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drm: Check crtc viewport correctly with rotated primary plane on atomic drivers
[deliverable/linux.git] / drivers / gpu / drm / drm_crtc.c
CommitLineData
f453ba04
DA		 1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
5 *
6 * DRM core CRTC related functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Keith Packard
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
31 */
6ba6d03e 32#include <linux/ctype.h>
f453ba04 33#include <linux/list.h>
5a0e3ad6 34#include <linux/slab.h>
2d1a8a48 35#include <linux/export.h>
760285e7
DH		 36#include <drm/drmP.h>
37#include <drm/drm_crtc.h>
38#include <drm/drm_edid.h>
39#include <drm/drm_fourcc.h>
51fd371b 40#include <drm/drm_modeset_lock.h>
88a48e29 41#include <drm/drm_atomic.h>
f453ba04 42
8bd441b2 43#include "drm_crtc_internal.h"
67d0ec4e 44#include "drm_internal.h"
8bd441b2 45
9a6f5130
CW		 46static struct drm_framebuffer *
47internal_framebuffer_create(struct drm_device *dev,
48 struct drm_mode_fb_cmd2 *r,
49 struct drm_file *file_priv);
c394c2b0 50
f453ba04
DA		 51/* Avoid boilerplate. I'm tired of typing. */
52#define DRM_ENUM_NAME_FN(fnname, list) \
d20d3174 53 const char *fnname(int val) \
f453ba04
DA		 54 { \
55 int i; \
56 for (i = 0; i < ARRAY_SIZE(list); i++) { \
57 if (list[i].type == val) \
58 return list[i].name; \
59 } \
60 return "(unknown)"; \
61 }
62
63/*
64 * Global properties
65 */
4dfd909f
TR		 66static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
67 { DRM_MODE_DPMS_ON, "On" },
f453ba04
DA		 68 { DRM_MODE_DPMS_STANDBY, "Standby" },
69 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
70 { DRM_MODE_DPMS_OFF, "Off" }
71};
72
73DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
74
4dfd909f 75static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
9922ab5a
RC		 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
77 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
78 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
79};
80
f453ba04
DA		 81/*
82 * Optional properties
83 */
4dfd909f 84static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
53bd8389
JB		 85 { DRM_MODE_SCALE_NONE, "None" },
86 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
87 { DRM_MODE_SCALE_CENTER, "Center" },
88 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
f453ba04
DA		 89};
90
ff587e45
VK		 91static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
95};
96
f453ba04
DA		 97/*
98 * Non-global properties, but "required" for certain connectors.
99 */
4dfd909f 100static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
f453ba04
DA		 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
104};
105
106DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
107
4dfd909f 108static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
f453ba04
DA		 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
112};
113
114DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
115 drm_dvi_i_subconnector_enum_list)
116
4dfd909f 117static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
f453ba04
DA		 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
aeaa1ad3 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
f453ba04
DA		 123};
124
125DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
126
4dfd909f 127static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
f453ba04
DA		 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
aeaa1ad3 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
f453ba04
DA		 133};
134
135DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
136 drm_tv_subconnector_enum_list)
137
d20d3174 138static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
884840aa
JB		 139 { DRM_MODE_DIRTY_OFF, "Off" },
140 { DRM_MODE_DIRTY_ON, "On" },
141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
142};
143
f453ba04
DA		 144struct drm_conn_prop_enum_list {
145 int type;
d20d3174 146 const char *name;
b21e3afe 147 struct ida ida;
f453ba04
DA		 148};
149
150/*
151 * Connector and encoder types.
152 */
4dfd909f
TR		 153static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
b21e3afe
IM		 155 { DRM_MODE_CONNECTOR_VGA, "VGA" },
156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
159 { DRM_MODE_CONNECTOR_Composite, "Composite" },
160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
162 { DRM_MODE_CONNECTOR_Component, "Component" },
163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
167 { DRM_MODE_CONNECTOR_TV, "TV" },
168 { DRM_MODE_CONNECTOR_eDP, "eDP" },
169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
b8923273 170 { DRM_MODE_CONNECTOR_DSI, "DSI" },
f453ba04
DA		 171};
172
4dfd909f
TR		 173static const struct drm_prop_enum_list drm_encoder_enum_list[] = {
174 { DRM_MODE_ENCODER_NONE, "None" },
f453ba04
DA		 175 { DRM_MODE_ENCODER_DAC, "DAC" },
176 { DRM_MODE_ENCODER_TMDS, "TMDS" },
177 { DRM_MODE_ENCODER_LVDS, "LVDS" },
178 { DRM_MODE_ENCODER_TVDAC, "TV" },
a7331e5c 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
b8923273 180 { DRM_MODE_ENCODER_DSI, "DSI" },
182407a6 181 { DRM_MODE_ENCODER_DPMST, "DP MST" },
f453ba04
DA		 182};
183
4dfd909f 184static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
ac1bb36c
JB		 185 { SubPixelUnknown, "Unknown" },
186 { SubPixelHorizontalRGB, "Horizontal RGB" },
187 { SubPixelHorizontalBGR, "Horizontal BGR" },
188 { SubPixelVerticalRGB, "Vertical RGB" },
189 { SubPixelVerticalBGR, "Vertical BGR" },
190 { SubPixelNone, "None" },
191};
192
b21e3afe
IM		 193void drm_connector_ida_init(void)
194{
195 int i;
196
197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
198 ida_init(&drm_connector_enum_list[i].ida);
199}
200
201void drm_connector_ida_destroy(void)
202{
203 int i;
204
205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
206 ida_destroy(&drm_connector_enum_list[i].ida);
207}
208
c8e32cc1
DV		 209/**
210 * drm_get_connector_status_name - return a string for connector status
211 * @status: connector status to compute name of
212 *
213 * In contrast to the other drm_get_*_name functions this one here returns a
214 * const pointer and hence is threadsafe.
215 */
d20d3174 216const char *drm_get_connector_status_name(enum drm_connector_status status)
f453ba04
DA		 217{
218 if (status == connector_status_connected)
219 return "connected";
220 else if (status == connector_status_disconnected)
221 return "disconnected";
222 else
223 return "unknown";
224}
ed7951dc 225EXPORT_SYMBOL(drm_get_connector_status_name);
f453ba04 226
ac1bb36c
JB		 227/**
228 * drm_get_subpixel_order_name - return a string for a given subpixel enum
229 * @order: enum of subpixel_order
230 *
231 * Note you could abuse this and return something out of bounds, but that
232 * would be a caller error. No unscrubbed user data should make it here.
233 */
234const char *drm_get_subpixel_order_name(enum subpixel_order order)
235{
236 return drm_subpixel_enum_list[order].name;
237}
238EXPORT_SYMBOL(drm_get_subpixel_order_name);
239
6ba6d03e
VS		 240static char printable_char(int c)
241{
242 return isascii(c) && isprint(c) ? c : '?';
243}
244
c8e32cc1
DV		 245/**
246 * drm_get_format_name - return a string for drm fourcc format
247 * @format: format to compute name of
248 *
249 * Note that the buffer used by this function is globally shared and owned by
250 * the function itself.
251 *
252 * FIXME: This isn't really multithreading safe.
253 */
d20d3174 254const char *drm_get_format_name(uint32_t format)
6ba6d03e
VS		 255{
256 static char buf[32];
257
258 snprintf(buf, sizeof(buf),
259 "%c%c%c%c %s-endian (0x%08x)",
260 printable_char(format & 0xff),
261 printable_char((format >> 8) & 0xff),
262 printable_char((format >> 16) & 0xff),
263 printable_char((format >> 24) & 0x7f),
264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
265 format);
266
267 return buf;
268}
269EXPORT_SYMBOL(drm_get_format_name);
270
2ee39452
DA		 271/*
272 * Internal function to assign a slot in the object idr and optionally
273 * register the object into the idr.
274 */
275static int drm_mode_object_get_reg(struct drm_device *dev,
276 struct drm_mode_object *obj,
277 uint32_t obj_type,
278 bool register_obj)
279{
280 int ret;
281
282 mutex_lock(&dev->mode_config.idr_mutex);
283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
284 if (ret >= 0) {
285 /*
286 * Set up the object linking under the protection of the idr
287 * lock so that other users can't see inconsistent state.
288 */
289 obj->id = ret;
290 obj->type = obj_type;
291 }
292 mutex_unlock(&dev->mode_config.idr_mutex);
293
294 return ret < 0 ? ret : 0;
295}
296
f453ba04 297/**
065a50ed 298 * drm_mode_object_get - allocate a new modeset identifier
f453ba04 299 * @dev: DRM device
065a50ed
DV		 300 * @obj: object pointer, used to generate unique ID
301 * @obj_type: object type
f453ba04 302 *
f453ba04 303 * Create a unique identifier based on @ptr in @dev's identifier space. Used
c8e32cc1
DV		 304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
305 * modeset identifiers are _not_ reference counted. Hence don't use this for
306 * reference counted modeset objects like framebuffers.
f453ba04 307 *
c8e32cc1 308 * Returns:
3c67d839 309 * Zero on success, error code on failure.
f453ba04 310 */
8bd441b2
DV		 311int drm_mode_object_get(struct drm_device *dev,
312 struct drm_mode_object *obj, uint32_t obj_type)
f453ba04 313{
2ee39452
DA		 314 return drm_mode_object_get_reg(dev, obj, obj_type, true);
315}
f453ba04 316
2ee39452
DA		 317static void drm_mode_object_register(struct drm_device *dev,
318 struct drm_mode_object *obj)
319{
ad2563c2 320 mutex_lock(&dev->mode_config.idr_mutex);
2ee39452 321 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
ad2563c2 322 mutex_unlock(&dev->mode_config.idr_mutex);
f453ba04
DA		 323}
324
325/**
065a50ed 326 * drm_mode_object_put - free a modeset identifer
f453ba04 327 * @dev: DRM device
065a50ed 328 * @object: object to free
f453ba04 329 *
c8e32cc1
DV		 330 * Free @id from @dev's unique identifier pool. Note that despite the _get
331 * postfix modeset identifiers are _not_ reference counted. Hence don't use this
332 * for reference counted modeset objects like framebuffers.
f453ba04 333 */
8bd441b2
DV		 334void drm_mode_object_put(struct drm_device *dev,
335 struct drm_mode_object *object)
f453ba04 336{
ad2563c2 337 mutex_lock(&dev->mode_config.idr_mutex);
f453ba04 338 idr_remove(&dev->mode_config.crtc_idr, object->id);
ad2563c2 339 mutex_unlock(&dev->mode_config.idr_mutex);
f453ba04
DA		 340}
341
98f75de4
RC		 342static struct drm_mode_object *_object_find(struct drm_device *dev,
343 uint32_t id, uint32_t type)
344{
345 struct drm_mode_object *obj = NULL;
346
347 mutex_lock(&dev->mode_config.idr_mutex);
348 obj = idr_find(&dev->mode_config.crtc_idr, id);
168c02ec
DV		 349 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
350 obj = NULL;
351 if (obj && obj->id != id)
352 obj = NULL;
353 /* don't leak out unref'd fb's */
6bcacf51
DS		 354 if (obj &&
355 (obj->type == DRM_MODE_OBJECT_FB ||
356 obj->type == DRM_MODE_OBJECT_BLOB))
98f75de4
RC		 357 obj = NULL;
358 mutex_unlock(&dev->mode_config.idr_mutex);
359
360 return obj;
361}
362
786b99ed
DV		 363/**
364 * drm_mode_object_find - look up a drm object with static lifetime
365 * @dev: drm device
366 * @id: id of the mode object
367 * @type: type of the mode object
368 *
369 * Note that framebuffers cannot be looked up with this functions - since those
98f75de4
RC		 370 * are reference counted, they need special treatment. Even with
371 * DRM_MODE_OBJECT_ANY (although that will simply return NULL
372 * rather than WARN_ON()).
786b99ed 373 */
7a9c9060
DV		 374struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
375 uint32_t id, uint32_t type)
f453ba04 376{
ad2563c2 377 struct drm_mode_object *obj = NULL;
f453ba04 378
786b99ed
DV		 379 /* Framebuffers are reference counted and need their own lookup
380 * function.*/
6bcacf51 381 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB);
98f75de4 382 obj = _object_find(dev, id, type);
f453ba04
DA		 383 return obj;
384}
385EXPORT_SYMBOL(drm_mode_object_find);
386
f453ba04
DA		 387/**
388 * drm_framebuffer_init - initialize a framebuffer
389 * @dev: DRM device
065a50ed
DV		 390 * @fb: framebuffer to be initialized
391 * @funcs: ... with these functions
f453ba04 392 *
f453ba04
DA		 393 * Allocates an ID for the framebuffer's parent mode object, sets its mode
394 * functions & device file and adds it to the master fd list.
395 *
4b096ac1
DV		 396 * IMPORTANT:
397 * This functions publishes the fb and makes it available for concurrent access
398 * by other users. Which means by this point the fb _must_ be fully set up -
399 * since all the fb attributes are invariant over its lifetime, no further
400 * locking but only correct reference counting is required.
401 *
c8e32cc1 402 * Returns:
af901ca1 403 * Zero on success, error code on failure.
f453ba04
DA		 404 */
405int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
406 const struct drm_framebuffer_funcs *funcs)
407{
408 int ret;
409
4b096ac1 410 mutex_lock(&dev->mode_config.fb_lock);
f7eff60e 411 kref_init(&fb->refcount);
4b096ac1
DV		 412 INIT_LIST_HEAD(&fb->filp_head);
413 fb->dev = dev;
414 fb->funcs = funcs;
f7eff60e 415
f453ba04 416 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
6bfc56aa 417 if (ret)
4b096ac1 418 goto out;
f453ba04 419
f453ba04
DA		 420 dev->mode_config.num_fb++;
421 list_add(&fb->head, &dev->mode_config.fb_list);
4b096ac1
DV		 422out:
423 mutex_unlock(&dev->mode_config.fb_lock);
f453ba04 424
3c67d839 425 return ret;
f453ba04
DA		 426}
427EXPORT_SYMBOL(drm_framebuffer_init);
428
83f45fc3
DV		 429/* dev->mode_config.fb_lock must be held! */
430static void __drm_framebuffer_unregister(struct drm_device *dev,
431 struct drm_framebuffer *fb)
432{
433 mutex_lock(&dev->mode_config.idr_mutex);
434 idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
435 mutex_unlock(&dev->mode_config.idr_mutex);
436
437 fb->base.id = 0;
438}
439
f7eff60e
RC		 440static void drm_framebuffer_free(struct kref *kref)
441{
442 struct drm_framebuffer *fb =
443 container_of(kref, struct drm_framebuffer, refcount);
83f45fc3
DV		 444 struct drm_device *dev = fb->dev;
445
446 /*
447 * The lookup idr holds a weak reference, which has not necessarily been
448 * removed at this point. Check for that.
449 */
450 mutex_lock(&dev->mode_config.fb_lock);
451 if (fb->base.id) {
452 /* Mark fb as reaped and drop idr ref. */
453 __drm_framebuffer_unregister(dev, fb);
454 }
455 mutex_unlock(&dev->mode_config.fb_lock);
456
f7eff60e
RC		 457 fb->funcs->destroy(fb);
458}
459
2b677e8c
DV		 460static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
461 uint32_t id)
462{
463 struct drm_mode_object *obj = NULL;
464 struct drm_framebuffer *fb;
465
466 mutex_lock(&dev->mode_config.idr_mutex);
467 obj = idr_find(&dev->mode_config.crtc_idr, id);
468 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
469 fb = NULL;
470 else
471 fb = obj_to_fb(obj);
472 mutex_unlock(&dev->mode_config.idr_mutex);
473
474 return fb;
475}
476
786b99ed
DV		 477/**
478 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
479 * @dev: drm device
480 * @id: id of the fb object
481 *
482 * If successful, this grabs an additional reference to the framebuffer -
483 * callers need to make sure to eventually unreference the returned framebuffer
c8e32cc1 484 * again, using @drm_framebuffer_unreference.
786b99ed
DV		 485 */
486struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
487 uint32_t id)
488{
786b99ed
DV		 489 struct drm_framebuffer *fb;
490
491 mutex_lock(&dev->mode_config.fb_lock);
2b677e8c 492 fb = __drm_framebuffer_lookup(dev, id);
83f45fc3
DV		 493 if (fb) {
494 if (!kref_get_unless_zero(&fb->refcount))
495 fb = NULL;
496 }
786b99ed
DV		 497 mutex_unlock(&dev->mode_config.fb_lock);
498
499 return fb;
500}
501EXPORT_SYMBOL(drm_framebuffer_lookup);
502
f7eff60e
RC		 503/**
504 * drm_framebuffer_unreference - unref a framebuffer
065a50ed
DV		 505 * @fb: framebuffer to unref
506 *
507 * This functions decrements the fb's refcount and frees it if it drops to zero.
f7eff60e
RC		 508 */
509void drm_framebuffer_unreference(struct drm_framebuffer *fb)
510{
8291272a 511 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
f7eff60e
RC		 512 kref_put(&fb->refcount, drm_framebuffer_free);
513}
514EXPORT_SYMBOL(drm_framebuffer_unreference);
515
516/**
517 * drm_framebuffer_reference - incr the fb refcnt
065a50ed 518 * @fb: framebuffer
c8e32cc1
DV		 519 *
520 * This functions increments the fb's refcount.
f7eff60e
RC		 521 */
522void drm_framebuffer_reference(struct drm_framebuffer *fb)
523{
8291272a 524 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
f7eff60e
RC		 525 kref_get(&fb->refcount);
526}
527EXPORT_SYMBOL(drm_framebuffer_reference);
528
36206361
DV		 529/**
530 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
531 * @fb: fb to unregister
532 *
533 * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
534 * those used for fbdev. Note that the caller must hold a reference of it's own,
535 * i.e. the object may not be destroyed through this call (since it'll lead to a
536 * locking inversion).
537 */
538void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
539{
a39a357c
DV		 540 struct drm_device *dev;
541
542 if (!fb)
543 return;
544
545 dev = fb->dev;
2b677e8c
DV		 546
547 mutex_lock(&dev->mode_config.fb_lock);
548 /* Mark fb as reaped and drop idr ref. */
549 __drm_framebuffer_unregister(dev, fb);
550 mutex_unlock(&dev->mode_config.fb_lock);
36206361
DV		 551}
552EXPORT_SYMBOL(drm_framebuffer_unregister_private);
553
f453ba04
DA		 554/**
555 * drm_framebuffer_cleanup - remove a framebuffer object
556 * @fb: framebuffer to remove
557 *
c8e32cc1
DV		 558 * Cleanup framebuffer. This function is intended to be used from the drivers
559 * ->destroy callback. It can also be used to clean up driver private
560 * framebuffers embedded into a larger structure.
36206361
DV		 561 *
562 * Note that this function does not remove the fb from active usuage - if it is
563 * still used anywhere, hilarity can ensue since userspace could call getfb on
564 * the id and get back -EINVAL. Obviously no concern at driver unload time.
565 *
566 * Also, the framebuffer will not be removed from the lookup idr - for
567 * user-created framebuffers this will happen in in the rmfb ioctl. For
568 * driver-private objects (e.g. for fbdev) drivers need to explicitly call
569 * drm_framebuffer_unregister_private.
f453ba04
DA		 570 */
571void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
f7eff60e
RC		 572{
573 struct drm_device *dev = fb->dev;
8faf6b18 574
4b096ac1 575 mutex_lock(&dev->mode_config.fb_lock);
f7eff60e
RC		 576 list_del(&fb->head);
577 dev->mode_config.num_fb--;
4b096ac1 578 mutex_unlock(&dev->mode_config.fb_lock);
f7eff60e
RC		 579}
580EXPORT_SYMBOL(drm_framebuffer_cleanup);
581
582/**
583 * drm_framebuffer_remove - remove and unreference a framebuffer object
584 * @fb: framebuffer to remove
585 *
f7eff60e 586 * Scans all the CRTCs and planes in @dev's mode_config. If they're
36206361 587 * using @fb, removes it, setting it to NULL. Then drops the reference to the
b62584e3
DV		 588 * passed-in framebuffer. Might take the modeset locks.
589 *
590 * Note that this function optimizes the cleanup away if the caller holds the
591 * last reference to the framebuffer. It is also guaranteed to not take the
592 * modeset locks in this case.
f7eff60e
RC		 593 */
594void drm_framebuffer_remove(struct drm_framebuffer *fb)
f453ba04 595{
a39a357c 596 struct drm_device *dev;
f453ba04 597 struct drm_crtc *crtc;
8cf5c917 598 struct drm_plane *plane;
5ef5f72f
DA		 599 struct drm_mode_set set;
600 int ret;
f453ba04 601
a39a357c
DV		 602 if (!fb)
603 return;
604
605 dev = fb->dev;
606
4b096ac1 607 WARN_ON(!list_empty(&fb->filp_head));
8faf6b18 608
b62584e3
DV		 609 /*
610 * drm ABI mandates that we remove any deleted framebuffers from active
611 * useage. But since most sane clients only remove framebuffers they no
612 * longer need, try to optimize this away.
613 *
614 * Since we're holding a reference ourselves, observing a refcount of 1
615 * means that we're the last holder and can skip it. Also, the refcount
616 * can never increase from 1 again, so we don't need any barriers or
617 * locks.
618 *
619 * Note that userspace could try to race with use and instate a new
620 * usage _after_ we've cleared all current ones. End result will be an
621 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
622 * in this manner.
623 */
624 if (atomic_read(&fb->refcount.refcount) > 1) {
625 drm_modeset_lock_all(dev);
626 /* remove from any CRTC */
6295d607 627 drm_for_each_crtc(crtc, dev) {
f4510a27 628 if (crtc->primary->fb == fb) {
b62584e3
DV		 629 /* should turn off the crtc */
630 memset(&set, 0, sizeof(struct drm_mode_set));
631 set.crtc = crtc;
632 set.fb = NULL;
633 ret = drm_mode_set_config_internal(&set);
634 if (ret)
635 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
636 }
5ef5f72f 637 }
f453ba04 638
6295d607 639 drm_for_each_plane(plane, dev) {
9125e618
VS		 640 if (plane->fb == fb)
641 drm_plane_force_disable(plane);
8cf5c917 642 }
b62584e3 643 drm_modeset_unlock_all(dev);
8cf5c917
JB		 644 }
645
f7eff60e 646 drm_framebuffer_unreference(fb);
f453ba04 647}
f7eff60e 648EXPORT_SYMBOL(drm_framebuffer_remove);
f453ba04 649
51fd371b
RC		 650DEFINE_WW_CLASS(crtc_ww_class);
651
f453ba04 652/**
e13161af
MR		 653 * drm_crtc_init_with_planes - Initialise a new CRTC object with
654 * specified primary and cursor planes.
f453ba04
DA		 655 * @dev: DRM device
656 * @crtc: CRTC object to init
e13161af
MR		 657 * @primary: Primary plane for CRTC
658 * @cursor: Cursor plane for CRTC
f453ba04
DA		 659 * @funcs: callbacks for the new CRTC
660 *
ad6f5c34 661 * Inits a new object created as base part of a driver crtc object.
6bfc56aa 662 *
c8e32cc1 663 * Returns:
6bfc56aa 664 * Zero on success, error code on failure.
f453ba04 665 */
e13161af
MR		 666int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
667 struct drm_plane *primary,
fc1d3e44 668 struct drm_plane *cursor,
e13161af 669 const struct drm_crtc_funcs *funcs)
f453ba04 670{
51fd371b 671 struct drm_mode_config *config = &dev->mode_config;
6bfc56aa
VS		 672 int ret;
673
522cf91f
BG		 674 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
675 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
676
f453ba04
DA		 677 crtc->dev = dev;
678 crtc->funcs = funcs;
679
51fd371b 680 drm_modeset_lock_init(&crtc->mutex);
6bfc56aa
VS		 681 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
682 if (ret)
baf698b0 683 return ret;
f453ba04 684
bffd9de0
PZ		 685 crtc->base.properties = &crtc->properties;
686
51fd371b
RC		 687 list_add_tail(&crtc->head, &config->crtc_list);
688 config->num_crtc++;
6bfc56aa 689
e13161af 690 crtc->primary = primary;
fc1d3e44 691 crtc->cursor = cursor;
e13161af
MR		 692 if (primary)
693 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
fc1d3e44
MR		 694 if (cursor)
695 cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
e13161af 696
eab3bbef
DV		 697 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
698 drm_object_attach_property(&crtc->base, config->prop_active, 0);
955f3c33 699 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
eab3bbef
DV		 700 }
701
baf698b0 702 return 0;
f453ba04 703}
e13161af 704EXPORT_SYMBOL(drm_crtc_init_with_planes);
f453ba04
DA		 705
706/**
ad6f5c34 707 * drm_crtc_cleanup - Clean up the core crtc usage
f453ba04
DA		 708 * @crtc: CRTC to cleanup
709 *
ad6f5c34
VS		 710 * This function cleans up @crtc and removes it from the DRM mode setting
711 * core. Note that the function does *not* free the crtc structure itself,
712 * this is the responsibility of the caller.
f453ba04
DA		 713 */
714void drm_crtc_cleanup(struct drm_crtc *crtc)
715{
716 struct drm_device *dev = crtc->dev;
717
9e1c156f
SK		 718 kfree(crtc->gamma_store);
719 crtc->gamma_store = NULL;
f453ba04 720
51fd371b
RC		 721 drm_modeset_lock_fini(&crtc->mutex);
722
f453ba04
DA		 723 drm_mode_object_put(dev, &crtc->base);
724 list_del(&crtc->head);
725 dev->mode_config.num_crtc--;
3009c037
TR		 726
727 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
728 if (crtc->state && crtc->funcs->atomic_destroy_state)
729 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
a18c0af1
TR		 730
731 memset(crtc, 0, sizeof(*crtc));
f453ba04
DA		 732}
733EXPORT_SYMBOL(drm_crtc_cleanup);
734
db5f7a6e
RK		 735/**
736 * drm_crtc_index - find the index of a registered CRTC
737 * @crtc: CRTC to find index for
738 *
739 * Given a registered CRTC, return the index of that CRTC within a DRM
740 * device's list of CRTCs.
741 */
742unsigned int drm_crtc_index(struct drm_crtc *crtc)
743{
744 unsigned int index = 0;
745 struct drm_crtc *tmp;
746
e4f62546 747 drm_for_each_crtc(tmp, crtc->dev) {
db5f7a6e
RK		 748 if (tmp == crtc)
749 return index;
750
751 index++;
752 }
753
754 BUG();
755}
756EXPORT_SYMBOL(drm_crtc_index);
757
86f422d5 758/*
f453ba04
DA		 759 * drm_mode_remove - remove and free a mode
760 * @connector: connector list to modify
761 * @mode: mode to remove
762 *
f453ba04
DA		 763 * Remove @mode from @connector's mode list, then free it.
764 */
86f422d5
LD		 765static void drm_mode_remove(struct drm_connector *connector,
766 struct drm_display_mode *mode)
f453ba04
DA		 767{
768 list_del(&mode->head);
554f1d78 769 drm_mode_destroy(connector->dev, mode);
f453ba04 770}
f453ba04 771
b5571e9d
BB		 772/**
773 * drm_display_info_set_bus_formats - set the supported bus formats
774 * @info: display info to store bus formats in
e37bfa1a
BB		 775 * @formats: array containing the supported bus formats
776 * @num_formats: the number of entries in the fmts array
b5571e9d
BB		 777 *
778 * Store the supported bus formats in display info structure.
779 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
780 * a full list of available formats.
781 */
782int drm_display_info_set_bus_formats(struct drm_display_info *info,
783 const u32 *formats,
784 unsigned int num_formats)
785{
786 u32 *fmts = NULL;
787
788 if (!formats && num_formats)
789 return -EINVAL;
790
791 if (formats && num_formats) {
792 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
793 GFP_KERNEL);
944579c5 794 if (!fmts)
b5571e9d
BB		 795 return -ENOMEM;
796 }
797
798 kfree(info->bus_formats);
799 info->bus_formats = fmts;
800 info->num_bus_formats = num_formats;
801
802 return 0;
803}
804EXPORT_SYMBOL(drm_display_info_set_bus_formats);
805
eaf99c74
CW		 806/**
807 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
808 * @connector: connector to quwery
eaf99c74
CW		 809 *
810 * The kernel supports per-connector configration of its consoles through
811 * use of the video= parameter. This function parses that option and
812 * extracts the user's specified mode (or enable/disable status) for a
813 * particular connector. This is typically only used during the early fbdev
814 * setup.
815 */
816static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
817{
818 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
819 char *option = NULL;
820
821 if (fb_get_options(connector->name, &option))
822 return;
823
824 if (!drm_mode_parse_command_line_for_connector(option,
825 connector,
826 mode))
827 return;
828
829 if (mode->force) {
830 const char *s;
831
832 switch (mode->force) {
833 case DRM_FORCE_OFF:
834 s = "OFF";
835 break;
836 case DRM_FORCE_ON_DIGITAL:
837 s = "ON - dig";
838 break;
839 default:
840 case DRM_FORCE_ON:
841 s = "ON";
842 break;
843 }
844
845 DRM_INFO("forcing %s connector %s\n", connector->name, s);
846 connector->force = mode->force;
847 }
848
849 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
850 connector->name,
851 mode->xres, mode->yres,
852 mode->refresh_specified ? mode->refresh : 60,
853 mode->rb ? " reduced blanking" : "",
854 mode->margins ? " with margins" : "",
855 mode->interlace ? " interlaced" : "");
856}
857
f453ba04
DA		 858/**
859 * drm_connector_init - Init a preallocated connector
860 * @dev: DRM device
861 * @connector: the connector to init
862 * @funcs: callbacks for this connector
065a50ed 863 * @connector_type: user visible type of the connector
f453ba04 864 *
f453ba04
DA		 865 * Initialises a preallocated connector. Connectors should be
866 * subclassed as part of driver connector objects.
6bfc56aa 867 *
c8e32cc1 868 * Returns:
6bfc56aa 869 * Zero on success, error code on failure.
f453ba04 870 */
6bfc56aa
VS		 871int drm_connector_init(struct drm_device *dev,
872 struct drm_connector *connector,
873 const struct drm_connector_funcs *funcs,
874 int connector_type)
f453ba04 875{
ae16c597 876 struct drm_mode_config *config = &dev->mode_config;
6bfc56aa 877 int ret;
b21e3afe
IM		 878 struct ida *connector_ida =
879 &drm_connector_enum_list[connector_type].ida;
6bfc56aa 880
84849903 881 drm_modeset_lock_all(dev);
f453ba04 882
2ee39452 883 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
6bfc56aa 884 if (ret)
2abdd313 885 goto out_unlock;
6bfc56aa 886
7e3bdf4a 887 connector->base.properties = &connector->properties;
f453ba04
DA		 888 connector->dev = dev;
889 connector->funcs = funcs;
f453ba04
DA		 890 connector->connector_type = connector_type;
891 connector->connector_type_id =
b21e3afe
IM		 892 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
893 if (connector->connector_type_id < 0) {
894 ret = connector->connector_type_id;
2abdd313 895 goto out_put;
b21e3afe 896 }
2abdd313
JN		 897 connector->name =
898 kasprintf(GFP_KERNEL, "%s-%d",
899 drm_connector_enum_list[connector_type].name,
900 connector->connector_type_id);
901 if (!connector->name) {
902 ret = -ENOMEM;
903 goto out_put;
904 }
905
f453ba04
DA		 906 INIT_LIST_HEAD(&connector->probed_modes);
907 INIT_LIST_HEAD(&connector->modes);
908 connector->edid_blob_ptr = NULL;
5e2cb2f6 909 connector->status = connector_status_unknown;
f453ba04 910
eaf99c74
CW		 911 drm_connector_get_cmdline_mode(connector);
912
c7eb76f4
DV		 913 /* We should add connectors at the end to avoid upsetting the connector
914 * index too much. */
ae16c597
RC		 915 list_add_tail(&connector->head, &config->connector_list);
916 config->num_connector++;
f453ba04 917
a7331e5c 918 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
58495563 919 drm_object_attach_property(&connector->base,
ae16c597 920 config->edid_property,
a7331e5c 921 0);
f453ba04 922
58495563 923 drm_object_attach_property(&connector->base,
ae16c597
RC		 924 config->dpms_property, 0);
925
926 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
927 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
928 }
f453ba04 929
30f65707
TW		 930 connector->debugfs_entry = NULL;
931
2abdd313
JN		 932out_put:
933 if (ret)
934 drm_mode_object_put(dev, &connector->base);
935
936out_unlock:
84849903 937 drm_modeset_unlock_all(dev);
6bfc56aa
VS		 938
939 return ret;
f453ba04
DA		 940}
941EXPORT_SYMBOL(drm_connector_init);
942
943/**
944 * drm_connector_cleanup - cleans up an initialised connector
945 * @connector: connector to cleanup
946 *
f453ba04
DA		 947 * Cleans up the connector but doesn't free the object.
948 */
949void drm_connector_cleanup(struct drm_connector *connector)
950{
951 struct drm_device *dev = connector->dev;
952 struct drm_display_mode *mode, *t;
953
40d9b043
DA		 954 if (connector->tile_group) {
955 drm_mode_put_tile_group(dev, connector->tile_group);
956 connector->tile_group = NULL;
957 }
958
f453ba04
DA		 959 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
960 drm_mode_remove(connector, mode);
961
962 list_for_each_entry_safe(mode, t, &connector->modes, head)
963 drm_mode_remove(connector, mode);
964
b21e3afe
IM		 965 ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
966 connector->connector_type_id);
967
b5571e9d 968 kfree(connector->display_info.bus_formats);
f453ba04 969 drm_mode_object_put(dev, &connector->base);
2abdd313
JN		 970 kfree(connector->name);
971 connector->name = NULL;
f453ba04 972 list_del(&connector->head);
6380c509 973 dev->mode_config.num_connector--;
3009c037
TR		 974
975 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
976 if (connector->state && connector->funcs->atomic_destroy_state)
977 connector->funcs->atomic_destroy_state(connector,
978 connector->state);
a18c0af1
TR		 979
980 memset(connector, 0, sizeof(*connector));
f453ba04
DA		 981}
982EXPORT_SYMBOL(drm_connector_cleanup);
983
10f637bf
DV		 984/**
985 * drm_connector_index - find the index of a registered connector
986 * @connector: connector to find index for
987 *
988 * Given a registered connector, return the index of that connector within a DRM
989 * device's list of connectors.
990 */
991unsigned int drm_connector_index(struct drm_connector *connector)
992{
993 unsigned int index = 0;
994 struct drm_connector *tmp;
c7eb76f4
DV		 995 struct drm_mode_config *config = &connector->dev->mode_config;
996
997 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
10f637bf 998
9a9f5ce8 999 drm_for_each_connector(tmp, connector->dev) {
10f637bf
DV		 1000 if (tmp == connector)
1001 return index;
1002
1003 index++;
1004 }
1005
1006 BUG();
1007}
1008EXPORT_SYMBOL(drm_connector_index);
1009
34ea3d38
TW		 1010/**
1011 * drm_connector_register - register a connector
1012 * @connector: the connector to register
1013 *
1014 * Register userspace interfaces for a connector
1015 *
1016 * Returns:
1017 * Zero on success, error code on failure.
1018 */
1019int drm_connector_register(struct drm_connector *connector)
1020{
30f65707
TW		 1021 int ret;
1022
2ee39452
DA		 1023 drm_mode_object_register(connector->dev, &connector->base);
1024
30f65707
TW		 1025 ret = drm_sysfs_connector_add(connector);
1026 if (ret)
1027 return ret;
1028
1029 ret = drm_debugfs_connector_add(connector);
1030 if (ret) {
1031 drm_sysfs_connector_remove(connector);
1032 return ret;
1033 }
1034
1035 return 0;
34ea3d38
TW		 1036}
1037EXPORT_SYMBOL(drm_connector_register);
1038
1039/**
1040 * drm_connector_unregister - unregister a connector
1041 * @connector: the connector to unregister
1042 *
1043 * Unregister userspace interfaces for a connector
1044 */
1045void drm_connector_unregister(struct drm_connector *connector)
1046{
1047 drm_sysfs_connector_remove(connector);
30f65707 1048 drm_debugfs_connector_remove(connector);
34ea3d38
TW		 1049}
1050EXPORT_SYMBOL(drm_connector_unregister);
1051
1052
c8e32cc1
DV		 1053/**
1054 * drm_connector_unplug_all - unregister connector userspace interfaces
1055 * @dev: drm device
1056 *
1057 * This function unregisters all connector userspace interfaces in sysfs. Should
1058 * be call when the device is disconnected, e.g. from an usb driver's
1059 * ->disconnect callback.
1060 */
cbc7e221
DA		 1061void drm_connector_unplug_all(struct drm_device *dev)
1062{
1063 struct drm_connector *connector;
1064
9a9f5ce8 1065 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
cbc7e221 1066 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
34ea3d38 1067 drm_connector_unregister(connector);
cbc7e221
DA		 1068
1069}
1070EXPORT_SYMBOL(drm_connector_unplug_all);
1071
c8e32cc1
DV		 1072/**
1073 * drm_encoder_init - Init a preallocated encoder
1074 * @dev: drm device
1075 * @encoder: the encoder to init
1076 * @funcs: callbacks for this encoder
1077 * @encoder_type: user visible type of the encoder
1078 *
1079 * Initialises a preallocated encoder. Encoder should be
1080 * subclassed as part of driver encoder objects.
1081 *
1082 * Returns:
1083 * Zero on success, error code on failure.
1084 */
6bfc56aa 1085int drm_encoder_init(struct drm_device *dev,
cbc7e221
DA		 1086 struct drm_encoder *encoder,
1087 const struct drm_encoder_funcs *funcs,
1088 int encoder_type)
f453ba04 1089{
6bfc56aa
VS		 1090 int ret;
1091
84849903 1092 drm_modeset_lock_all(dev);
f453ba04 1093
6bfc56aa
VS		 1094 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
1095 if (ret)
e5748946 1096 goto out_unlock;
f453ba04 1097
6bfc56aa 1098 encoder->dev = dev;
f453ba04
DA		 1099 encoder->encoder_type = encoder_type;
1100 encoder->funcs = funcs;
e5748946
JN		 1101 encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
1102 drm_encoder_enum_list[encoder_type].name,
1103 encoder->base.id);
1104 if (!encoder->name) {
1105 ret = -ENOMEM;
1106 goto out_put;
1107 }
f453ba04
DA		 1108
1109 list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
1110 dev->mode_config.num_encoder++;
1111
e5748946
JN		 1112out_put:
1113 if (ret)
1114 drm_mode_object_put(dev, &encoder->base);
1115
1116out_unlock:
84849903 1117 drm_modeset_unlock_all(dev);
6bfc56aa
VS		 1118
1119 return ret;
f453ba04
DA		 1120}
1121EXPORT_SYMBOL(drm_encoder_init);
1122
c8e32cc1
DV		 1123/**
1124 * drm_encoder_cleanup - cleans up an initialised encoder
1125 * @encoder: encoder to cleanup
1126 *
1127 * Cleans up the encoder but doesn't free the object.
1128 */
f453ba04
DA		 1129void drm_encoder_cleanup(struct drm_encoder *encoder)
1130{
1131 struct drm_device *dev = encoder->dev;
4dfd909f 1132
84849903 1133 drm_modeset_lock_all(dev);
f453ba04 1134 drm_mode_object_put(dev, &encoder->base);
e5748946 1135 kfree(encoder->name);
f453ba04 1136 list_del(&encoder->head);
6380c509 1137 dev->mode_config.num_encoder--;
84849903 1138 drm_modeset_unlock_all(dev);
a18c0af1
TR		 1139
1140 memset(encoder, 0, sizeof(*encoder));
f453ba04
DA		 1141}
1142EXPORT_SYMBOL(drm_encoder_cleanup);
1143
35f2c3ae 1144/**
dc415ff9 1145 * drm_universal_plane_init - Initialize a new universal plane object
35f2c3ae
VS		 1146 * @dev: DRM device
1147 * @plane: plane object to init
1148 * @possible_crtcs: bitmask of possible CRTCs
1149 * @funcs: callbacks for the new plane
1150 * @formats: array of supported formats (%DRM_FORMAT_*)
1151 * @format_count: number of elements in @formats
dc415ff9 1152 * @type: type of plane (overlay, primary, cursor)
35f2c3ae 1153 *
dc415ff9 1154 * Initializes a plane object of type @type.
35f2c3ae 1155 *
c8e32cc1 1156 * Returns:
35f2c3ae
VS		 1157 * Zero on success, error code on failure.
1158 */
dc415ff9
MR		 1159int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
1160 unsigned long possible_crtcs,
1161 const struct drm_plane_funcs *funcs,
45e3743a 1162 const uint32_t *formats, unsigned int format_count,
dc415ff9 1163 enum drm_plane_type type)
8cf5c917 1164{
6b4959f4 1165 struct drm_mode_config *config = &dev->mode_config;
6bfc56aa
VS		 1166 int ret;
1167
6bfc56aa
VS		 1168 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
1169 if (ret)
baf698b0 1170 return ret;
6bfc56aa 1171
4d02e2de
DV		 1172 drm_modeset_lock_init(&plane->mutex);
1173
4d93914a 1174 plane->base.properties = &plane->properties;
8cf5c917 1175 plane->dev = dev;
8cf5c917 1176 plane->funcs = funcs;
2f6c5389
TR		 1177 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
1178 GFP_KERNEL);
8cf5c917
JB		 1179 if (!plane->format_types) {
1180 DRM_DEBUG_KMS("out of memory when allocating plane\n");
1181 drm_mode_object_put(dev, &plane->base);
baf698b0 1182 return -ENOMEM;
8cf5c917
JB		 1183 }
1184
308e5bcb 1185 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
8cf5c917
JB		 1186 plane->format_count = format_count;
1187 plane->possible_crtcs = possible_crtcs;
dc415ff9 1188 plane->type = type;
8cf5c917 1189
6b4959f4
RC		 1190 list_add_tail(&plane->head, &config->plane_list);
1191 config->num_total_plane++;
dc415ff9 1192 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
6b4959f4 1193 config->num_overlay_plane++;
8cf5c917 1194
9922ab5a 1195 drm_object_attach_property(&plane->base,
6b4959f4 1196 config->plane_type_property,
9922ab5a
RC		 1197 plane->type);
1198
6b4959f4
RC		 1199 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
1200 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
1201 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
1202 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
1203 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
1204 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
1205 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
1206 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
1207 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
1208 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
1209 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
1210 }
1211
baf698b0 1212 return 0;
8cf5c917 1213}
dc415ff9
MR		 1214EXPORT_SYMBOL(drm_universal_plane_init);
1215
1216/**
1217 * drm_plane_init - Initialize a legacy plane
1218 * @dev: DRM device
1219 * @plane: plane object to init
1220 * @possible_crtcs: bitmask of possible CRTCs
1221 * @funcs: callbacks for the new plane
1222 * @formats: array of supported formats (%DRM_FORMAT_*)
1223 * @format_count: number of elements in @formats
1224 * @is_primary: plane type (primary vs overlay)
1225 *
1226 * Legacy API to initialize a DRM plane.
1227 *
1228 * New drivers should call drm_universal_plane_init() instead.
1229 *
1230 * Returns:
1231 * Zero on success, error code on failure.
1232 */
1233int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
1234 unsigned long possible_crtcs,
1235 const struct drm_plane_funcs *funcs,
45e3743a 1236 const uint32_t *formats, unsigned int format_count,
dc415ff9
MR		 1237 bool is_primary)
1238{
1239 enum drm_plane_type type;
1240
1241 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1242 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
1243 formats, format_count, type);
1244}
8cf5c917
JB		 1245EXPORT_SYMBOL(drm_plane_init);
1246
35f2c3ae
VS		 1247/**
1248 * drm_plane_cleanup - Clean up the core plane usage
1249 * @plane: plane to cleanup
1250 *
1251 * This function cleans up @plane and removes it from the DRM mode setting
1252 * core. Note that the function does *not* free the plane structure itself,
1253 * this is the responsibility of the caller.
1254 */
8cf5c917
JB		 1255void drm_plane_cleanup(struct drm_plane *plane)
1256{
1257 struct drm_device *dev = plane->dev;
1258
84849903 1259 drm_modeset_lock_all(dev);
8cf5c917
JB		 1260 kfree(plane->format_types);
1261 drm_mode_object_put(dev, &plane->base);
dc415ff9
MR		 1262
1263 BUG_ON(list_empty(&plane->head));
1264
1265 list_del(&plane->head);
1266 dev->mode_config.num_total_plane--;
1267 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1268 dev->mode_config.num_overlay_plane--;
84849903 1269 drm_modeset_unlock_all(dev);
3009c037
TR		 1270
1271 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
1272 if (plane->state && plane->funcs->atomic_destroy_state)
1273 plane->funcs->atomic_destroy_state(plane, plane->state);
a18c0af1
TR		 1274
1275 memset(plane, 0, sizeof(*plane));
8cf5c917
JB		 1276}
1277EXPORT_SYMBOL(drm_plane_cleanup);
1278
10f637bf
DV		 1279/**
1280 * drm_plane_index - find the index of a registered plane
1281 * @plane: plane to find index for
1282 *
1283 * Given a registered plane, return the index of that CRTC within a DRM
1284 * device's list of planes.
1285 */
1286unsigned int drm_plane_index(struct drm_plane *plane)
1287{
1288 unsigned int index = 0;
1289 struct drm_plane *tmp;
1290
e4f62546 1291 drm_for_each_plane(tmp, plane->dev) {
10f637bf
DV		 1292 if (tmp == plane)
1293 return index;
1294
1295 index++;
1296 }
1297
1298 BUG();
1299}
1300EXPORT_SYMBOL(drm_plane_index);
1301
f81338a5
CK		 1302/**
1303 * drm_plane_from_index - find the registered plane at an index
1304 * @dev: DRM device
1305 * @idx: index of registered plane to find for
1306 *
1307 * Given a plane index, return the registered plane from DRM device's
1308 * list of planes with matching index.
1309 */
1310struct drm_plane *
1311drm_plane_from_index(struct drm_device *dev, int idx)
1312{
1313 struct drm_plane *plane;
1314 unsigned int i = 0;
1315
6295d607 1316 drm_for_each_plane(plane, dev) {
f81338a5
CK		 1317 if (i == idx)
1318 return plane;
1319 i++;
1320 }
1321 return NULL;
1322}
1323EXPORT_SYMBOL(drm_plane_from_index);
1324
35f2c3ae
VS		 1325/**
1326 * drm_plane_force_disable - Forcibly disable a plane
1327 * @plane: plane to disable
1328 *
1329 * Forces the plane to be disabled.
1330 *
1331 * Used when the plane's current framebuffer is destroyed,
1332 * and when restoring fbdev mode.
1333 */
9125e618
VS		 1334void drm_plane_force_disable(struct drm_plane *plane)
1335{
1336 int ret;
1337
3d30a59b 1338 if (!plane->fb)
9125e618
VS		 1339 return;
1340
3d30a59b 1341 plane->old_fb = plane->fb;
9125e618 1342 ret = plane->funcs->disable_plane(plane);
731cce48 1343 if (ret) {
9125e618 1344 DRM_ERROR("failed to disable plane with busy fb\n");
3d30a59b 1345 plane->old_fb = NULL;
731cce48
DV		 1346 return;
1347 }
9125e618 1348 /* disconnect the plane from the fb and crtc: */
220dd2bc 1349 drm_framebuffer_unreference(plane->old_fb);
3d30a59b 1350 plane->old_fb = NULL;
9125e618
VS		 1351 plane->fb = NULL;
1352 plane->crtc = NULL;
1353}
1354EXPORT_SYMBOL(drm_plane_force_disable);
1355
6b4959f4 1356static int drm_mode_create_standard_properties(struct drm_device *dev)
f453ba04 1357{
356af0e1 1358 struct drm_property *prop;
f453ba04
DA		 1359
1360 /*
1361 * Standard properties (apply to all connectors)
1362 */
356af0e1 1363 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
f453ba04
DA		 1364 DRM_MODE_PROP_IMMUTABLE,
1365 "EDID", 0);
356af0e1
RC		 1366 if (!prop)
1367 return -ENOMEM;
1368 dev->mode_config.edid_property = prop;
f453ba04 1369
356af0e1 1370 prop = drm_property_create_enum(dev, 0,
4a67d391
SH		 1371 "DPMS", drm_dpms_enum_list,
1372 ARRAY_SIZE(drm_dpms_enum_list));
356af0e1
RC		 1373 if (!prop)
1374 return -ENOMEM;
1375 dev->mode_config.dpms_property = prop;
6f134d7b 1376
356af0e1
RC		 1377 prop = drm_property_create(dev,
1378 DRM_MODE_PROP_BLOB |
1379 DRM_MODE_PROP_IMMUTABLE,
1380 "PATH", 0);
1381 if (!prop)
1382 return -ENOMEM;
1383 dev->mode_config.path_property = prop;
f453ba04 1384
356af0e1
RC		 1385 prop = drm_property_create(dev,
1386 DRM_MODE_PROP_BLOB |
1387 DRM_MODE_PROP_IMMUTABLE,
1388 "TILE", 0);
1389 if (!prop)
1390 return -ENOMEM;
1391 dev->mode_config.tile_property = prop;
9922ab5a 1392
6b4959f4 1393 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
9922ab5a
RC		 1394 "type", drm_plane_type_enum_list,
1395 ARRAY_SIZE(drm_plane_type_enum_list));
6b4959f4
RC		 1396 if (!prop)
1397 return -ENOMEM;
1398 dev->mode_config.plane_type_property = prop;
1399
1400 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1401 "SRC_X", 0, UINT_MAX);
1402 if (!prop)
1403 return -ENOMEM;
1404 dev->mode_config.prop_src_x = prop;
1405
1406 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1407 "SRC_Y", 0, UINT_MAX);
1408 if (!prop)
1409 return -ENOMEM;
1410 dev->mode_config.prop_src_y = prop;
1411
1412 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1413 "SRC_W", 0, UINT_MAX);
1414 if (!prop)
1415 return -ENOMEM;
1416 dev->mode_config.prop_src_w = prop;
1417
1418 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1419 "SRC_H", 0, UINT_MAX);
1420 if (!prop)
1421 return -ENOMEM;
1422 dev->mode_config.prop_src_h = prop;
1423
1424 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1425 "CRTC_X", INT_MIN, INT_MAX);
1426 if (!prop)
1427 return -ENOMEM;
1428 dev->mode_config.prop_crtc_x = prop;
1429
1430 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1431 "CRTC_Y", INT_MIN, INT_MAX);
1432 if (!prop)
1433 return -ENOMEM;
1434 dev->mode_config.prop_crtc_y = prop;
1435
1436 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1437 "CRTC_W", 0, INT_MAX);
1438 if (!prop)
1439 return -ENOMEM;
1440 dev->mode_config.prop_crtc_w = prop;
1441
1442 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1443 "CRTC_H", 0, INT_MAX);
1444 if (!prop)
1445 return -ENOMEM;
1446 dev->mode_config.prop_crtc_h = prop;
1447
1448 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1449 "FB_ID", DRM_MODE_OBJECT_FB);
1450 if (!prop)
1451 return -ENOMEM;
1452 dev->mode_config.prop_fb_id = prop;
1453
1454 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1455 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
1456 if (!prop)
1457 return -ENOMEM;
1458 dev->mode_config.prop_crtc_id = prop;
9922ab5a 1459
eab3bbef
DV		 1460 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
1461 "ACTIVE");
1462 if (!prop)
1463 return -ENOMEM;
1464 dev->mode_config.prop_active = prop;
1465
955f3c33
DS		 1466 prop = drm_property_create(dev,
1467 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
1468 "MODE_ID", 0);
1469 if (!prop)
1470 return -ENOMEM;
1471 dev->mode_config.prop_mode_id = prop;
1472
9922ab5a
RC		 1473 return 0;
1474}
1475
f453ba04
DA		 1476/**
1477 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1478 * @dev: DRM device
1479 *
1480 * Called by a driver the first time a DVI-I connector is made.
1481 */
1482int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1483{
1484 struct drm_property *dvi_i_selector;
1485 struct drm_property *dvi_i_subconnector;
f453ba04
DA		 1486
1487 if (dev->mode_config.dvi_i_select_subconnector_property)
1488 return 0;
1489
1490 dvi_i_selector =
4a67d391 1491 drm_property_create_enum(dev, 0,
f453ba04 1492 "select subconnector",
4a67d391 1493 drm_dvi_i_select_enum_list,
f453ba04 1494 ARRAY_SIZE(drm_dvi_i_select_enum_list));
f453ba04
DA		 1495 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1496
4a67d391 1497 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
f453ba04 1498 "subconnector",
4a67d391 1499 drm_dvi_i_subconnector_enum_list,
f453ba04 1500 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
f453ba04
DA		 1501 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1502
1503 return 0;
1504}
1505EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1506
1507/**
1508 * drm_create_tv_properties - create TV specific connector properties
1509 * @dev: DRM device
1510 * @num_modes: number of different TV formats (modes) supported
1511 * @modes: array of pointers to strings containing name of each format
1512 *
1513 * Called by a driver's TV initialization routine, this function creates
1514 * the TV specific connector properties for a given device. Caller is
1515 * responsible for allocating a list of format names and passing them to
1516 * this routine.
1517 */
2f763312
TR		 1518int drm_mode_create_tv_properties(struct drm_device *dev,
1519 unsigned int num_modes,
b7c914b3 1520 const char * const modes[])
f453ba04
DA		 1521{
1522 struct drm_property *tv_selector;
1523 struct drm_property *tv_subconnector;
2f763312 1524 unsigned int i;
f453ba04
DA		 1525
1526 if (dev->mode_config.tv_select_subconnector_property)
1527 return 0;
1528
1529 /*
1530 * Basic connector properties
1531 */
4a67d391 1532 tv_selector = drm_property_create_enum(dev, 0,
f453ba04 1533 "select subconnector",
4a67d391 1534 drm_tv_select_enum_list,
f453ba04 1535 ARRAY_SIZE(drm_tv_select_enum_list));
f453ba04
DA		 1536 dev->mode_config.tv_select_subconnector_property = tv_selector;
1537
1538 tv_subconnector =
4a67d391
SH		 1539 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1540 "subconnector",
1541 drm_tv_subconnector_enum_list,
f453ba04 1542 ARRAY_SIZE(drm_tv_subconnector_enum_list));
f453ba04
DA		 1543 dev->mode_config.tv_subconnector_property = tv_subconnector;
1544
1545 /*
1546 * Other, TV specific properties: margins & TV modes.
1547 */
1548 dev->mode_config.tv_left_margin_property =
d9bc3c02 1549 drm_property_create_range(dev, 0, "left margin", 0, 100);
f453ba04
DA		 1550
1551 dev->mode_config.tv_right_margin_property =
d9bc3c02 1552 drm_property_create_range(dev, 0, "right margin", 0, 100);
f453ba04
DA		 1553
1554 dev->mode_config.tv_top_margin_property =
d9bc3c02 1555 drm_property_create_range(dev, 0, "top margin", 0, 100);
f453ba04
DA		 1556
1557 dev->mode_config.tv_bottom_margin_property =
d9bc3c02 1558 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
f453ba04
DA		 1559
1560 dev->mode_config.tv_mode_property =
1561 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1562 "mode", num_modes);
1563 for (i = 0; i < num_modes; i++)
1564 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1565 i, modes[i]);
1566
b6b7902e 1567 dev->mode_config.tv_brightness_property =
d9bc3c02 1568 drm_property_create_range(dev, 0, "brightness", 0, 100);
b6b7902e
FJ		 1569
1570 dev->mode_config.tv_contrast_property =
d9bc3c02 1571 drm_property_create_range(dev, 0, "contrast", 0, 100);
b6b7902e
FJ		 1572
1573 dev->mode_config.tv_flicker_reduction_property =
d9bc3c02 1574 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
b6b7902e 1575
a75f0236 1576 dev->mode_config.tv_overscan_property =
d9bc3c02 1577 drm_property_create_range(dev, 0, "overscan", 0, 100);
a75f0236
FJ		 1578
1579 dev->mode_config.tv_saturation_property =
d9bc3c02 1580 drm_property_create_range(dev, 0, "saturation", 0, 100);
a75f0236
FJ		 1581
1582 dev->mode_config.tv_hue_property =
d9bc3c02 1583 drm_property_create_range(dev, 0, "hue", 0, 100);
a75f0236 1584
f453ba04
DA		 1585 return 0;
1586}
1587EXPORT_SYMBOL(drm_mode_create_tv_properties);
1588
1589/**
1590 * drm_mode_create_scaling_mode_property - create scaling mode property
1591 * @dev: DRM device
1592 *
1593 * Called by a driver the first time it's needed, must be attached to desired
1594 * connectors.
1595 */
1596int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1597{
1598 struct drm_property *scaling_mode;
f453ba04
DA		 1599
1600 if (dev->mode_config.scaling_mode_property)
1601 return 0;
1602
1603 scaling_mode =
4a67d391
SH		 1604 drm_property_create_enum(dev, 0, "scaling mode",
1605 drm_scaling_mode_enum_list,
f453ba04 1606 ARRAY_SIZE(drm_scaling_mode_enum_list));
f453ba04
DA		 1607
1608 dev->mode_config.scaling_mode_property = scaling_mode;
1609
1610 return 0;
1611}
1612EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1613
ff587e45
VK		 1614/**
1615 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1616 * @dev: DRM device
1617 *
1618 * Called by a driver the first time it's needed, must be attached to desired
1619 * connectors.
1620 *
1621 * Returns:
1a498633 1622 * Zero on success, negative errno on failure.
ff587e45
VK		 1623 */
1624int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1625{
1626 if (dev->mode_config.aspect_ratio_property)
1627 return 0;
1628
1629 dev->mode_config.aspect_ratio_property =
1630 drm_property_create_enum(dev, 0, "aspect ratio",
1631 drm_aspect_ratio_enum_list,
1632 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1633
1634 if (dev->mode_config.aspect_ratio_property == NULL)
1635 return -ENOMEM;
1636
1637 return 0;
1638}
1639EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1640
884840aa
JB		 1641/**
1642 * drm_mode_create_dirty_property - create dirty property
1643 * @dev: DRM device
1644 *
1645 * Called by a driver the first time it's needed, must be attached to desired
1646 * connectors.
1647 */
1648int drm_mode_create_dirty_info_property(struct drm_device *dev)
1649{
1650 struct drm_property *dirty_info;
884840aa
JB		 1651
1652 if (dev->mode_config.dirty_info_property)
1653 return 0;
1654
1655 dirty_info =
4a67d391 1656 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
884840aa 1657 "dirty",
4a67d391 1658 drm_dirty_info_enum_list,
884840aa 1659 ARRAY_SIZE(drm_dirty_info_enum_list));
884840aa
JB		 1660 dev->mode_config.dirty_info_property = dirty_info;
1661
1662 return 0;
1663}
1664EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1665
5bb2bbf5
DA		 1666/**
1667 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1668 * @dev: DRM device
1669 *
1670 * Create the the suggested x/y offset property for connectors.
1671 */
1672int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1673{
1674 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1675 return 0;
1676
1677 dev->mode_config.suggested_x_property =
1678 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1679
1680 dev->mode_config.suggested_y_property =
1681 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1682
1683 if (dev->mode_config.suggested_x_property == NULL ||
1684 dev->mode_config.suggested_y_property == NULL)
1685 return -ENOMEM;
1686 return 0;
1687}
1688EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1689
f453ba04
DA		 1690/**
1691 * drm_mode_getresources - get graphics configuration
065a50ed
DV		 1692 * @dev: drm device for the ioctl
1693 * @data: data pointer for the ioctl
1694 * @file_priv: drm file for the ioctl call
f453ba04 1695 *
f453ba04
DA		 1696 * Construct a set of configuration description structures and return
1697 * them to the user, including CRTC, connector and framebuffer configuration.
1698 *
1699 * Called by the user via ioctl.
1700 *
c8e32cc1 1701 * Returns:
1a498633 1702 * Zero on success, negative errno on failure.
f453ba04
DA		 1703 */
1704int drm_mode_getresources(struct drm_device *dev, void *data,
1705 struct drm_file *file_priv)
1706{
1707 struct drm_mode_card_res *card_res = data;
1708 struct list_head *lh;
1709 struct drm_framebuffer *fb;
1710 struct drm_connector *connector;
1711 struct drm_crtc *crtc;
1712 struct drm_encoder *encoder;
1713 int ret = 0;
1714 int connector_count = 0;
1715 int crtc_count = 0;
1716 int fb_count = 0;
1717 int encoder_count = 0;
9c7060f7 1718 int copied = 0;
f453ba04
DA		 1719 uint32_t __user *fb_id;
1720 uint32_t __user *crtc_id;
1721 uint32_t __user *connector_id;
1722 uint32_t __user *encoder_id;
f453ba04 1723
fb3b06c8
DA		 1724 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1725 return -EINVAL;
1726
f453ba04 1727
4b096ac1 1728 mutex_lock(&file_priv->fbs_lock);
f453ba04
DA		 1729 /*
1730 * For the non-control nodes we need to limit the list of resources
1731 * by IDs in the group list for this node
1732 */
1733 list_for_each(lh, &file_priv->fbs)
1734 fb_count++;
1735
4b096ac1
DV		 1736 /* handle this in 4 parts */
1737 /* FBs */
1738 if (card_res->count_fbs >= fb_count) {
1739 copied = 0;
1740 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1741 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1742 if (put_user(fb->base.id, fb_id + copied)) {
1743 mutex_unlock(&file_priv->fbs_lock);
1744 return -EFAULT;
1745 }
1746 copied++;
1747 }
1748 }
1749 card_res->count_fbs = fb_count;
1750 mutex_unlock(&file_priv->fbs_lock);
1751
fcf93f69
DV		 1752 /* mode_config.mutex protects the connector list against e.g. DP MST
1753 * connector hot-adding. CRTC/Plane lists are invariant. */
1754 mutex_lock(&dev->mode_config.mutex);
9c7060f7
DV		 1755 drm_for_each_crtc(crtc, dev)
1756 crtc_count++;
f453ba04 1757
9c7060f7
DV		 1758 drm_for_each_connector(connector, dev)
1759 connector_count++;
f453ba04 1760
9c7060f7
DV		 1761 drm_for_each_encoder(encoder, dev)
1762 encoder_count++;
f453ba04
DA		 1763
1764 card_res->max_height = dev->mode_config.max_height;
1765 card_res->min_height = dev->mode_config.min_height;
1766 card_res->max_width = dev->mode_config.max_width;
1767 card_res->min_width = dev->mode_config.min_width;
1768
f453ba04
DA		 1769 /* CRTCs */
1770 if (card_res->count_crtcs >= crtc_count) {
1771 copied = 0;
1772 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
9c7060f7
DV		 1773 drm_for_each_crtc(crtc, dev) {
1774 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1775 if (put_user(crtc->base.id, crtc_id + copied)) {
1776 ret = -EFAULT;
1777 goto out;
f453ba04 1778 }
9c7060f7 1779 copied++;
f453ba04
DA		 1780 }
1781 }
1782 card_res->count_crtcs = crtc_count;
1783
1784 /* Encoders */
1785 if (card_res->count_encoders >= encoder_count) {
1786 copied = 0;
1787 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
9c7060f7
DV		 1788 drm_for_each_encoder(encoder, dev) {
1789 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1790 encoder->name);
1791 if (put_user(encoder->base.id, encoder_id +
1792 copied)) {
1793 ret = -EFAULT;
1794 goto out;
f453ba04 1795 }
9c7060f7 1796 copied++;
f453ba04
DA		 1797 }
1798 }
1799 card_res->count_encoders = encoder_count;
1800
1801 /* Connectors */
1802 if (card_res->count_connectors >= connector_count) {
1803 copied = 0;
1804 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
9c7060f7
DV		 1805 drm_for_each_connector(connector, dev) {
1806 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1807 connector->base.id,
1808 connector->name);
1809 if (put_user(connector->base.id,
1810 connector_id + copied)) {
1811 ret = -EFAULT;
1812 goto out;
f453ba04 1813 }
9c7060f7 1814 copied++;
f453ba04
DA		 1815 }
1816 }
1817 card_res->count_connectors = connector_count;
1818
9440106b 1819 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
f453ba04
DA		 1820 card_res->count_connectors, card_res->count_encoders);
1821
1822out:
fcf93f69 1823 mutex_unlock(&dev->mode_config.mutex);
f453ba04
DA		 1824 return ret;
1825}
1826
1827/**
1828 * drm_mode_getcrtc - get CRTC configuration
065a50ed
DV		 1829 * @dev: drm device for the ioctl
1830 * @data: data pointer for the ioctl
1831 * @file_priv: drm file for the ioctl call
f453ba04 1832 *
f453ba04
DA		 1833 * Construct a CRTC configuration structure to return to the user.
1834 *
1835 * Called by the user via ioctl.
1836 *
c8e32cc1 1837 * Returns:
1a498633 1838 * Zero on success, negative errno on failure.
f453ba04
DA		 1839 */
1840int drm_mode_getcrtc(struct drm_device *dev,
1841 void *data, struct drm_file *file_priv)
1842{
1843 struct drm_mode_crtc *crtc_resp = data;
1844 struct drm_crtc *crtc;
f453ba04 1845
fb3b06c8
DA		 1846 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1847 return -EINVAL;
1848
a2b34e22 1849 crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
fcf93f69
DV		 1850 if (!crtc)
1851 return -ENOENT;
f453ba04 1852
fcf93f69 1853 drm_modeset_lock_crtc(crtc, crtc->primary);
f453ba04 1854 crtc_resp->gamma_size = crtc->gamma_size;
f4510a27
MR		 1855 if (crtc->primary->fb)
1856 crtc_resp->fb_id = crtc->primary->fb->base.id;
f453ba04
DA		 1857 else
1858 crtc_resp->fb_id = 0;
1859
31c946e8
DV		 1860 if (crtc->state) {
1861 crtc_resp->x = crtc->primary->state->src_x >> 16;
1862 crtc_resp->y = crtc->primary->state->src_y >> 16;
1863 if (crtc->state->enable) {
934a8a89 1864 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
31c946e8 1865 crtc_resp->mode_valid = 1;
f453ba04 1866
31c946e8
DV		 1867 } else {
1868 crtc_resp->mode_valid = 0;
1869 }
f453ba04 1870 } else {
31c946e8
DV		 1871 crtc_resp->x = crtc->x;
1872 crtc_resp->y = crtc->y;
1873 if (crtc->enabled) {
934a8a89 1874 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
31c946e8
DV		 1875 crtc_resp->mode_valid = 1;
1876
1877 } else {
1878 crtc_resp->mode_valid = 0;
1879 }
f453ba04 1880 }
fcf93f69 1881 drm_modeset_unlock_crtc(crtc);
f453ba04 1882
baf698b0 1883 return 0;
f453ba04
DA		 1884}
1885
61d8e328
DL		 1886static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1887 const struct drm_file *file_priv)
1888{
1889 /*
1890 * If user-space hasn't configured the driver to expose the stereo 3D
1891 * modes, don't expose them.
1892 */
1893 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1894 return false;
1895
1896 return true;
1897}
1898
abd69c55
DV		 1899static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1900{
1901 /* For atomic drivers only state objects are synchronously updated and
1902 * protected by modeset locks, so check those first. */
1903 if (connector->state)
1904 return connector->state->best_encoder;
1905 return connector->encoder;
1906}
1907
95cbf110 1908/* helper for getconnector and getproperties ioctls */
88a48e29 1909static int get_properties(struct drm_mode_object *obj, bool atomic,
95cbf110
RC		 1910 uint32_t __user *prop_ptr, uint64_t __user *prop_values,
1911 uint32_t *arg_count_props)
1912{
88a48e29
RC		 1913 int props_count;
1914 int i, ret, copied;
1915
1916 props_count = obj->properties->count;
1917 if (!atomic)
1918 props_count -= obj->properties->atomic_count;
95cbf110
RC		 1919
1920 if ((*arg_count_props >= props_count) && props_count) {
88a48e29 1921 for (i = 0, copied = 0; copied < props_count; i++) {
95cbf110
RC		 1922 struct drm_property *prop = obj->properties->properties[i];
1923 uint64_t val;
1924
88a48e29
RC		 1925 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
1926 continue;
1927
95cbf110
RC		 1928 ret = drm_object_property_get_value(obj, prop, &val);
1929 if (ret)
1930 return ret;
1931
1932 if (put_user(prop->base.id, prop_ptr + copied))
1933 return -EFAULT;
1934
1935 if (put_user(val, prop_values + copied))
1936 return -EFAULT;
1937
1938 copied++;
1939 }
1940 }
1941 *arg_count_props = props_count;
1942
1943 return 0;
1944}
1945
f453ba04
DA		 1946/**
1947 * drm_mode_getconnector - get connector configuration
065a50ed
DV		 1948 * @dev: drm device for the ioctl
1949 * @data: data pointer for the ioctl
1950 * @file_priv: drm file for the ioctl call
f453ba04 1951 *
f453ba04
DA		 1952 * Construct a connector configuration structure to return to the user.
1953 *
1954 * Called by the user via ioctl.
1955 *
c8e32cc1 1956 * Returns:
1a498633 1957 * Zero on success, negative errno on failure.
f453ba04
DA		 1958 */
1959int drm_mode_getconnector(struct drm_device *dev, void *data,
1960 struct drm_file *file_priv)
1961{
1962 struct drm_mode_get_connector *out_resp = data;
f453ba04 1963 struct drm_connector *connector;
abd69c55 1964 struct drm_encoder *encoder;
f453ba04
DA		 1965 struct drm_display_mode *mode;
1966 int mode_count = 0;
f453ba04
DA		 1967 int encoders_count = 0;
1968 int ret = 0;
1969 int copied = 0;
1970 int i;
1971 struct drm_mode_modeinfo u_mode;
1972 struct drm_mode_modeinfo __user *mode_ptr;
f453ba04
DA		 1973 uint32_t __user *encoder_ptr;
1974
fb3b06c8
DA		 1975 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1976 return -EINVAL;
1977
f453ba04
DA		 1978 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1979
9440106b 1980 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
f453ba04 1981
7b24056b 1982 mutex_lock(&dev->mode_config.mutex);
f453ba04 1983
a2b34e22
RC		 1984 connector = drm_connector_find(dev, out_resp->connector_id);
1985 if (!connector) {
f27657f2 1986 ret = -ENOENT;
04bdf441 1987 goto out_unlock;
f453ba04 1988 }
f453ba04 1989
01073b08
TR		 1990 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1991 if (connector->encoder_ids[i] != 0)
f453ba04 1992 encoders_count++;
f453ba04
DA		 1993
1994 if (out_resp->count_modes == 0) {
1995 connector->funcs->fill_modes(connector,
1996 dev->mode_config.max_width,
1997 dev->mode_config.max_height);
1998 }
1999
2000 /* delayed so we get modes regardless of pre-fill_modes state */
2001 list_for_each_entry(mode, &connector->modes, head)
61d8e328
DL		 2002 if (drm_mode_expose_to_userspace(mode, file_priv))
2003 mode_count++;
f453ba04
DA		 2004
2005 out_resp->connector_id = connector->base.id;
2006 out_resp->connector_type = connector->connector_type;
2007 out_resp->connector_type_id = connector->connector_type_id;
2008 out_resp->mm_width = connector->display_info.width_mm;
2009 out_resp->mm_height = connector->display_info.height_mm;
2010 out_resp->subpixel = connector->display_info.subpixel_order;
2011 out_resp->connection = connector->status;
2caa80e7
DV		 2012
2013 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
abd69c55
DV		 2014 encoder = drm_connector_get_encoder(connector);
2015 if (encoder)
2016 out_resp->encoder_id = encoder->base.id;
f453ba04
DA		 2017 else
2018 out_resp->encoder_id = 0;
2019
2020 /*
2021 * This ioctl is called twice, once to determine how much space is
2022 * needed, and the 2nd time to fill it.
2023 */
2024 if ((out_resp->count_modes >= mode_count) && mode_count) {
2025 copied = 0;
81f6c7f8 2026 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
f453ba04 2027 list_for_each_entry(mode, &connector->modes, head) {
61d8e328
DL		 2028 if (!drm_mode_expose_to_userspace(mode, file_priv))
2029 continue;
2030
934a8a89 2031 drm_mode_convert_to_umode(&u_mode, mode);
f453ba04
DA		 2032 if (copy_to_user(mode_ptr + copied,
2033 &u_mode, sizeof(u_mode))) {
2034 ret = -EFAULT;
2035 goto out;
2036 }
2037 copied++;
2038 }
2039 }
2040 out_resp->count_modes = mode_count;
2041
88a48e29 2042 ret = get_properties(&connector->base, file_priv->atomic,
95cbf110
RC		 2043 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2044 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2045 &out_resp->count_props);
2046 if (ret)
2047 goto out;
f453ba04
DA		 2048
2049 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2050 copied = 0;
81f6c7f8 2051 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
f453ba04
DA		 2052 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
2053 if (connector->encoder_ids[i] != 0) {
2054 if (put_user(connector->encoder_ids[i],
2055 encoder_ptr + copied)) {
2056 ret = -EFAULT;
2057 goto out;
2058 }
2059 copied++;
2060 }
2061 }
2062 }
2063 out_resp->count_encoders = encoders_count;
2064
2065out:
ccfc0865 2066 drm_modeset_unlock(&dev->mode_config.connection_mutex);
04bdf441
TR		 2067
2068out_unlock:
7b24056b
DV		 2069 mutex_unlock(&dev->mode_config.mutex);
2070
f453ba04
DA		 2071 return ret;
2072}
2073
abd69c55
DV		 2074static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
2075{
2076 struct drm_connector *connector;
2077 struct drm_device *dev = encoder->dev;
2078 bool uses_atomic = false;
2079
2080 /* For atomic drivers only state objects are synchronously updated and
2081 * protected by modeset locks, so check those first. */
6295d607 2082 drm_for_each_connector(connector, dev) {
abd69c55
DV		 2083 if (!connector->state)
2084 continue;
2085
2086 uses_atomic = true;
2087
2088 if (connector->state->best_encoder != encoder)
2089 continue;
2090
2091 return connector->state->crtc;
2092 }
2093
2094 /* Don't return stale data (e.g. pending async disable). */
2095 if (uses_atomic)
2096 return NULL;
2097
2098 return encoder->crtc;
2099}
2100
c8e32cc1
DV		 2101/**
2102 * drm_mode_getencoder - get encoder configuration
2103 * @dev: drm device for the ioctl
2104 * @data: data pointer for the ioctl
2105 * @file_priv: drm file for the ioctl call
2106 *
2107 * Construct a encoder configuration structure to return to the user.
2108 *
2109 * Called by the user via ioctl.
2110 *
2111 * Returns:
1a498633 2112 * Zero on success, negative errno on failure.
c8e32cc1 2113 */
f453ba04
DA		 2114int drm_mode_getencoder(struct drm_device *dev, void *data,
2115 struct drm_file *file_priv)
2116{
2117 struct drm_mode_get_encoder *enc_resp = data;
f453ba04 2118 struct drm_encoder *encoder;
abd69c55 2119 struct drm_crtc *crtc;
f453ba04 2120
fb3b06c8
DA		 2121 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2122 return -EINVAL;
2123
a2b34e22 2124 encoder = drm_encoder_find(dev, enc_resp->encoder_id);
fcf93f69
DV		 2125 if (!encoder)
2126 return -ENOENT;
f453ba04 2127
fcf93f69 2128 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
abd69c55
DV		 2129 crtc = drm_encoder_get_crtc(encoder);
2130 if (crtc)
2131 enc_resp->crtc_id = crtc->base.id;
f453ba04
DA		 2132 else
2133 enc_resp->crtc_id = 0;
fcf93f69
DV		 2134 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2135
f453ba04
DA		 2136 enc_resp->encoder_type = encoder->encoder_type;
2137 enc_resp->encoder_id = encoder->base.id;
2138 enc_resp->possible_crtcs = encoder->possible_crtcs;
2139 enc_resp->possible_clones = encoder->possible_clones;
2140
baf698b0 2141 return 0;
f453ba04
DA		 2142}
2143
8cf5c917 2144/**
c8e32cc1 2145 * drm_mode_getplane_res - enumerate all plane resources
8cf5c917
JB		 2146 * @dev: DRM device
2147 * @data: ioctl data
2148 * @file_priv: DRM file info
2149 *
c8e32cc1
DV		 2150 * Construct a list of plane ids to return to the user.
2151 *
2152 * Called by the user via ioctl.
2153 *
2154 * Returns:
1a498633 2155 * Zero on success, negative errno on failure.
8cf5c917
JB		 2156 */
2157int drm_mode_getplane_res(struct drm_device *dev, void *data,
c8e32cc1 2158 struct drm_file *file_priv)
8cf5c917
JB		 2159{
2160 struct drm_mode_get_plane_res *plane_resp = data;
2161 struct drm_mode_config *config;
2162 struct drm_plane *plane;
2163 uint32_t __user *plane_ptr;
fcf93f69 2164 int copied = 0;
681e7ec7 2165 unsigned num_planes;
8cf5c917
JB		 2166
2167 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2168 return -EINVAL;
2169
8cf5c917
JB		 2170 config = &dev->mode_config;
2171
681e7ec7
MR		 2172 if (file_priv->universal_planes)
2173 num_planes = config->num_total_plane;
2174 else
2175 num_planes = config->num_overlay_plane;
2176
8cf5c917
JB		 2177 /*
2178 * This ioctl is called twice, once to determine how much space is
2179 * needed, and the 2nd time to fill it.
2180 */
681e7ec7
MR		 2181 if (num_planes &&
2182 (plane_resp->count_planes >= num_planes)) {
81f6c7f8 2183 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
8cf5c917 2184
fcf93f69 2185 /* Plane lists are invariant, no locking needed. */
e4f62546 2186 drm_for_each_plane(plane, dev) {
681e7ec7
MR		 2187 /*
2188 * Unless userspace set the 'universal planes'
2189 * capability bit, only advertise overlays.
2190 */
2191 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
2192 !file_priv->universal_planes)
e27dde3e
MR		 2193 continue;
2194
fcf93f69
DV		 2195 if (put_user(plane->base.id, plane_ptr + copied))
2196 return -EFAULT;
8cf5c917
JB		 2197 copied++;
2198 }
2199 }
681e7ec7 2200 plane_resp->count_planes = num_planes;
8cf5c917 2201
fcf93f69 2202 return 0;
8cf5c917
JB		 2203}
2204
2205/**
c8e32cc1 2206 * drm_mode_getplane - get plane configuration
8cf5c917
JB		 2207 * @dev: DRM device
2208 * @data: ioctl data
2209 * @file_priv: DRM file info
2210 *
c8e32cc1
DV		 2211 * Construct a plane configuration structure to return to the user.
2212 *
2213 * Called by the user via ioctl.
2214 *
2215 * Returns:
1a498633 2216 * Zero on success, negative errno on failure.
8cf5c917
JB		 2217 */
2218int drm_mode_getplane(struct drm_device *dev, void *data,
c8e32cc1 2219 struct drm_file *file_priv)
8cf5c917
JB		 2220{
2221 struct drm_mode_get_plane *plane_resp = data;
8cf5c917
JB		 2222 struct drm_plane *plane;
2223 uint32_t __user *format_ptr;
8cf5c917
JB		 2224
2225 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2226 return -EINVAL;
2227
a2b34e22 2228 plane = drm_plane_find(dev, plane_resp->plane_id);
fcf93f69
DV		 2229 if (!plane)
2230 return -ENOENT;
8cf5c917 2231
fcf93f69 2232 drm_modeset_lock(&plane->mutex, NULL);
8cf5c917
JB		 2233 if (plane->crtc)
2234 plane_resp->crtc_id = plane->crtc->base.id;
2235 else
2236 plane_resp->crtc_id = 0;
2237
2238 if (plane->fb)
2239 plane_resp->fb_id = plane->fb->base.id;
2240 else
2241 plane_resp->fb_id = 0;
fcf93f69 2242 drm_modeset_unlock(&plane->mutex);
8cf5c917
JB		 2243
2244 plane_resp->plane_id = plane->base.id;
2245 plane_resp->possible_crtcs = plane->possible_crtcs;
778ad903 2246 plane_resp->gamma_size = 0;
8cf5c917
JB		 2247
2248 /*
2249 * This ioctl is called twice, once to determine how much space is
2250 * needed, and the 2nd time to fill it.
2251 */
2252 if (plane->format_count &&
2253 (plane_resp->count_format_types >= plane->format_count)) {
81f6c7f8 2254 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
8cf5c917
JB		 2255 if (copy_to_user(format_ptr,
2256 plane->format_types,
2257 sizeof(uint32_t) * plane->format_count)) {
fcf93f69 2258 return -EFAULT;
8cf5c917
JB		 2259 }
2260 }
2261 plane_resp->count_format_types = plane->format_count;
2262
baf698b0 2263 return 0;
8cf5c917
JB		 2264}
2265
ead8610d
LP		 2266/**
2267 * drm_plane_check_pixel_format - Check if the plane supports the pixel format
2268 * @plane: plane to check for format support
2269 * @format: the pixel format
2270 *
2271 * Returns:
2272 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL
2273 * otherwise.
2274 */
2275int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
2276{
2277 unsigned int i;
2278
2279 for (i = 0; i < plane->format_count; i++) {
2280 if (format == plane->format_types[i])
2281 return 0;
2282 }
2283
2284 return -EINVAL;
2285}
2286
ce8d9ecc
VS		 2287static int check_src_coords(uint32_t src_x, uint32_t src_y,
2288 uint32_t src_w, uint32_t src_h,
2289 const struct drm_framebuffer *fb)
2290{
2291 unsigned int fb_width, fb_height;
2292
2293 fb_width = fb->width << 16;
2294 fb_height = fb->height << 16;
2295
2296 /* Make sure source coordinates are inside the fb. */
2297 if (src_w > fb_width ||
2298 src_x > fb_width - src_w ||
2299 src_h > fb_height ||
2300 src_y > fb_height - src_h) {
2301 DRM_DEBUG_KMS("Invalid source coordinates "
2302 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
2303 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
2304 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
2305 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
2306 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
2307 return -ENOSPC;
2308 }
2309
2310 return 0;
2311}
2312
b36552b3
MR		 2313/*
2314 * setplane_internal - setplane handler for internal callers
8cf5c917 2315 *
b36552b3
MR		 2316 * Note that we assume an extra reference has already been taken on fb. If the
2317 * update fails, this reference will be dropped before return; if it succeeds,
2318 * the previous framebuffer (if any) will be unreferenced instead.
c8e32cc1 2319 *
b36552b3 2320 * src_{x,y,w,h} are provided in 16.16 fixed point format
8cf5c917 2321 */
f2b50c11
DV		 2322static int __setplane_internal(struct drm_plane *plane,
2323 struct drm_crtc *crtc,
2324 struct drm_framebuffer *fb,
2325 int32_t crtc_x, int32_t crtc_y,
2326 uint32_t crtc_w, uint32_t crtc_h,
2327 /* src_{x,y,w,h} values are 16.16 fixed point */
2328 uint32_t src_x, uint32_t src_y,
2329 uint32_t src_w, uint32_t src_h)
8cf5c917 2330{
8cf5c917
JB		 2331 int ret = 0;
2332
8cf5c917 2333 /* No fb means shut it down */
b36552b3 2334 if (!fb) {
3d30a59b 2335 plane->old_fb = plane->fb;
731cce48
DV		 2336 ret = plane->funcs->disable_plane(plane);
2337 if (!ret) {
2338 plane->crtc = NULL;
2339 plane->fb = NULL;
2340 } else {
3d30a59b 2341 plane->old_fb = NULL;
731cce48 2342 }
8cf5c917
JB		 2343 goto out;
2344 }
2345
7f994f3f
MR		 2346 /* Check whether this plane is usable on this CRTC */
2347 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
2348 DRM_DEBUG_KMS("Invalid crtc for plane\n");
2349 ret = -EINVAL;
2350 goto out;
2351 }
2352
62443be6 2353 /* Check whether this plane supports the fb pixel format. */
ead8610d
LP		 2354 ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
2355 if (ret) {
6ba6d03e
VS		 2356 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2357 drm_get_format_name(fb->pixel_format));
62443be6
VS		 2358 goto out;
2359 }
2360
3968be94
MR		 2361 /* Give drivers some help against integer overflows */
2362 if (crtc_w > INT_MAX ||
2363 crtc_x > INT_MAX - (int32_t) crtc_w ||
2364 crtc_h > INT_MAX ||
2365 crtc_y > INT_MAX - (int32_t) crtc_h) {
2366 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2367 crtc_w, crtc_h, crtc_x, crtc_y);
c390eed0
VS		 2368 ret = -ERANGE;
2369 goto out;
3968be94
MR		 2370 }
2371
ce8d9ecc
VS		 2372 ret = check_src_coords(src_x, src_y, src_w, src_h, fb);
2373 if (ret)
42ef8789 2374 goto out;
42ef8789 2375
3d30a59b 2376 plane->old_fb = plane->fb;
8cf5c917 2377 ret = plane->funcs->update_plane(plane, crtc, fb,
b36552b3
MR		 2378 crtc_x, crtc_y, crtc_w, crtc_h,
2379 src_x, src_y, src_w, src_h);
8cf5c917
JB		 2380 if (!ret) {
2381 plane->crtc = crtc;
2382 plane->fb = fb;
35f8badc 2383 fb = NULL;
0fe27f06 2384 } else {
3d30a59b 2385 plane->old_fb = NULL;
8cf5c917
JB		 2386 }
2387
2388out:
6c2a7532
DV		 2389 if (fb)
2390 drm_framebuffer_unreference(fb);
3d30a59b
DV		 2391 if (plane->old_fb)
2392 drm_framebuffer_unreference(plane->old_fb);
2393 plane->old_fb = NULL;
8cf5c917
JB		 2394
2395 return ret;
f2b50c11 2396}
b36552b3 2397
f2b50c11
DV		 2398static int setplane_internal(struct drm_plane *plane,
2399 struct drm_crtc *crtc,
2400 struct drm_framebuffer *fb,
2401 int32_t crtc_x, int32_t crtc_y,
2402 uint32_t crtc_w, uint32_t crtc_h,
2403 /* src_{x,y,w,h} values are 16.16 fixed point */
2404 uint32_t src_x, uint32_t src_y,
2405 uint32_t src_w, uint32_t src_h)
2406{
2407 int ret;
2408
2409 drm_modeset_lock_all(plane->dev);
2410 ret = __setplane_internal(plane, crtc, fb,
2411 crtc_x, crtc_y, crtc_w, crtc_h,
2412 src_x, src_y, src_w, src_h);
2413 drm_modeset_unlock_all(plane->dev);
2414
2415 return ret;
b36552b3
MR		 2416}
2417
2418/**
2419 * drm_mode_setplane - configure a plane's configuration
2420 * @dev: DRM device
2421 * @data: ioctl data*
2422 * @file_priv: DRM file info
2423 *
2424 * Set plane configuration, including placement, fb, scaling, and other factors.
2425 * Or pass a NULL fb to disable (planes may be disabled without providing a
2426 * valid crtc).
2427 *
2428 * Returns:
1a498633 2429 * Zero on success, negative errno on failure.
b36552b3
MR		 2430 */
2431int drm_mode_setplane(struct drm_device *dev, void *data,
2432 struct drm_file *file_priv)
2433{
2434 struct drm_mode_set_plane *plane_req = data;
b36552b3
MR		 2435 struct drm_plane *plane;
2436 struct drm_crtc *crtc = NULL;
2437 struct drm_framebuffer *fb = NULL;
2438
2439 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2440 return -EINVAL;
2441
b36552b3
MR		 2442 /*
2443 * First, find the plane, crtc, and fb objects. If not available,
2444 * we don't bother to call the driver.
2445 */
933f622f
RC		 2446 plane = drm_plane_find(dev, plane_req->plane_id);
2447 if (!plane) {
b36552b3
MR		 2448 DRM_DEBUG_KMS("Unknown plane ID %d\n",
2449 plane_req->plane_id);
2450 return -ENOENT;
2451 }
b36552b3
MR		 2452
2453 if (plane_req->fb_id) {
2454 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
2455 if (!fb) {
2456 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
2457 plane_req->fb_id);
2458 return -ENOENT;
2459 }
2460
933f622f
RC		 2461 crtc = drm_crtc_find(dev, plane_req->crtc_id);
2462 if (!crtc) {
b36552b3
MR		 2463 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
2464 plane_req->crtc_id);
2465 return -ENOENT;
2466 }
b36552b3
MR		 2467 }
2468
161d0dc1
MR		 2469 /*
2470 * setplane_internal will take care of deref'ing either the old or new
2471 * framebuffer depending on success.
2472 */
17cfd91f 2473 return setplane_internal(plane, crtc, fb,
b36552b3
MR		 2474 plane_req->crtc_x, plane_req->crtc_y,
2475 plane_req->crtc_w, plane_req->crtc_h,
2476 plane_req->src_x, plane_req->src_y,
2477 plane_req->src_w, plane_req->src_h);
8cf5c917
JB		 2478}
2479
2d13b679
DV		 2480/**
2481 * drm_mode_set_config_internal - helper to call ->set_config
2482 * @set: modeset config to set
2483 *
2484 * This is a little helper to wrap internal calls to the ->set_config driver
2485 * interface. The only thing it adds is correct refcounting dance.
4dfd909f 2486 *
c8e32cc1 2487 * Returns:
1a498633 2488 * Zero on success, negative errno on failure.
2d13b679
DV		 2489 */
2490int drm_mode_set_config_internal(struct drm_mode_set *set)
2491{
2492 struct drm_crtc *crtc = set->crtc;
5cef29aa
DV		 2493 struct drm_framebuffer *fb;
2494 struct drm_crtc *tmp;
b0d12325
DV		 2495 int ret;
2496
5cef29aa
DV		 2497 /*
2498 * NOTE: ->set_config can also disable other crtcs (if we steal all
2499 * connectors from it), hence we need to refcount the fbs across all
2500 * crtcs. Atomic modeset will have saner semantics ...
2501 */
e4f62546 2502 drm_for_each_crtc(tmp, crtc->dev)
3d30a59b 2503 tmp->primary->old_fb = tmp->primary->fb;
5cef29aa 2504
b0d12325 2505 fb = set->fb;
2d13b679 2506
b0d12325
DV		 2507 ret = crtc->funcs->set_config(set);
2508 if (ret == 0) {
e13161af 2509 crtc->primary->crtc = crtc;
0fe27f06 2510 crtc->primary->fb = fb;
5cef29aa 2511 }
cc85e121 2512
e4f62546 2513 drm_for_each_crtc(tmp, crtc->dev) {
f4510a27
MR		 2514 if (tmp->primary->fb)
2515 drm_framebuffer_reference(tmp->primary->fb);
3d30a59b
DV		 2516 if (tmp->primary->old_fb)
2517 drm_framebuffer_unreference(tmp->primary->old_fb);
2518 tmp->primary->old_fb = NULL;
b0d12325
DV		 2519 }
2520
2521 return ret;
2d13b679
DV		 2522}
2523EXPORT_SYMBOL(drm_mode_set_config_internal);
2524
ecb7e16b
GP		 2525/**
2526 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
2527 * @mode: mode to query
2528 * @hdisplay: hdisplay value to fill in
2529 * @vdisplay: vdisplay value to fill in
2530 *
2531 * The vdisplay value will be doubled if the specified mode is a stereo mode of
2532 * the appropriate layout.
2533 */
2534void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
2535 int *hdisplay, int *vdisplay)
2536{
2537 struct drm_display_mode adjusted;
2538
2539 drm_mode_copy(&adjusted, mode);
2540 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
2541 *hdisplay = adjusted.crtc_hdisplay;
2542 *vdisplay = adjusted.crtc_vdisplay;
2543}
2544EXPORT_SYMBOL(drm_crtc_get_hv_timing);
2545
af93629d
MR		 2546/**
2547 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
2548 * CRTC viewport
2549 * @crtc: CRTC that framebuffer will be displayed on
2550 * @x: x panning
2551 * @y: y panning
2552 * @mode: mode that framebuffer will be displayed under
2553 * @fb: framebuffer to check size of
c11e9283 2554 */
af93629d
MR		 2555int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2556 int x, int y,
2557 const struct drm_display_mode *mode,
2558 const struct drm_framebuffer *fb)
c11e9283
DL		 2559
2560{
2561 int hdisplay, vdisplay;
2562
ecb7e16b 2563 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
a0c1bbb0 2564
33e0be63
VS		 2565 if (crtc->state &&
2566 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) |
2567 BIT(DRM_ROTATE_270)))
c11e9283
DL		 2568 swap(hdisplay, vdisplay);
2569
ce8d9ecc
VS		 2570 return check_src_coords(x << 16, y << 16,
2571 hdisplay << 16, vdisplay << 16, fb);
c11e9283 2572}
af93629d 2573EXPORT_SYMBOL(drm_crtc_check_viewport);
c11e9283 2574
f453ba04
DA		 2575/**
2576 * drm_mode_setcrtc - set CRTC configuration
065a50ed
DV		 2577 * @dev: drm device for the ioctl
2578 * @data: data pointer for the ioctl
2579 * @file_priv: drm file for the ioctl call
f453ba04 2580 *
f453ba04
DA		 2581 * Build a new CRTC configuration based on user request.
2582 *
2583 * Called by the user via ioctl.
2584 *
c8e32cc1 2585 * Returns:
1a498633 2586 * Zero on success, negative errno on failure.
f453ba04
DA		 2587 */
2588int drm_mode_setcrtc(struct drm_device *dev, void *data,
2589 struct drm_file *file_priv)
2590{
2591 struct drm_mode_config *config = &dev->mode_config;
2592 struct drm_mode_crtc *crtc_req = data;
6653cc8d 2593 struct drm_crtc *crtc;
f453ba04
DA		 2594 struct drm_connector **connector_set = NULL, *connector;
2595 struct drm_framebuffer *fb = NULL;
2596 struct drm_display_mode *mode = NULL;
2597 struct drm_mode_set set;
2598 uint32_t __user *set_connectors_ptr;
4a1b0714 2599 int ret;
f453ba04
DA		 2600 int i;
2601
fb3b06c8
DA		 2602 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2603 return -EINVAL;
2604
01447e9f
ZJ		 2605 /*
2606 * Universal plane src offsets are only 16.16, prevent havoc for
2607 * drivers using universal plane code internally.
2608 */
2609 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
1d97e915
VS		 2610 return -ERANGE;
2611
84849903 2612 drm_modeset_lock_all(dev);
a2b34e22
RC		 2613 crtc = drm_crtc_find(dev, crtc_req->crtc_id);
2614 if (!crtc) {
58367ed6 2615 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
f27657f2 2616 ret = -ENOENT;
f453ba04
DA		 2617 goto out;
2618 }
9440106b 2619 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
f453ba04
DA		 2620
2621 if (crtc_req->mode_valid) {
2622 /* If we have a mode we need a framebuffer. */
2623 /* If we pass -1, set the mode with the currently bound fb */
2624 if (crtc_req->fb_id == -1) {
f4510a27 2625 if (!crtc->primary->fb) {
6653cc8d
VS		 2626 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2627 ret = -EINVAL;
2628 goto out;
f453ba04 2629 }
f4510a27 2630 fb = crtc->primary->fb;
b0d12325
DV		 2631 /* Make refcounting symmetric with the lookup path. */
2632 drm_framebuffer_reference(fb);
f453ba04 2633 } else {
786b99ed
DV		 2634 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2635 if (!fb) {
58367ed6
ZY		 2636 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2637 crtc_req->fb_id);
37c4e705 2638 ret = -ENOENT;
f453ba04
DA		 2639 goto out;
2640 }
f453ba04
DA		 2641 }
2642
2643 mode = drm_mode_create(dev);
ee34ab5b
VS		 2644 if (!mode) {
2645 ret = -ENOMEM;
2646 goto out;
2647 }
2648
934a8a89 2649 ret = drm_mode_convert_umode(mode, &crtc_req->mode);
90367bf6
VS		 2650 if (ret) {
2651 DRM_DEBUG_KMS("Invalid mode\n");
2652 goto out;
2653 }
2654
f453ba04 2655 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
5f61bb42 2656
7eb5f302
LP		 2657 /*
2658 * Check whether the primary plane supports the fb pixel format.
2659 * Drivers not implementing the universal planes API use a
2660 * default formats list provided by the DRM core which doesn't
2661 * match real hardware capabilities. Skip the check in that
2662 * case.
2663 */
2664 if (!crtc->primary->format_default) {
2665 ret = drm_plane_check_pixel_format(crtc->primary,
2666 fb->pixel_format);
2667 if (ret) {
2668 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2669 drm_get_format_name(fb->pixel_format));
2670 goto out;
2671 }
2672 }
2673
c11e9283
DL		 2674 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2675 mode, fb);
2676 if (ret)
5f61bb42 2677 goto out;
c11e9283 2678
f453ba04
DA		 2679 }
2680
2681 if (crtc_req->count_connectors == 0 && mode) {
58367ed6 2682 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
f453ba04
DA		 2683 ret = -EINVAL;
2684 goto out;
2685 }
2686
7781de74 2687 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
58367ed6 2688 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
f453ba04
DA		 2689 crtc_req->count_connectors);
2690 ret = -EINVAL;
2691 goto out;
2692 }
2693
2694 if (crtc_req->count_connectors > 0) {
2695 u32 out_id;
2696
2697 /* Avoid unbounded kernel memory allocation */
2698 if (crtc_req->count_connectors > config->num_connector) {
2699 ret = -EINVAL;
2700 goto out;
2701 }
2702
2f6c5389
TR		 2703 connector_set = kmalloc_array(crtc_req->count_connectors,
2704 sizeof(struct drm_connector *),
2705 GFP_KERNEL);
f453ba04
DA		 2706 if (!connector_set) {
2707 ret = -ENOMEM;
2708 goto out;
2709 }
2710
2711 for (i = 0; i < crtc_req->count_connectors; i++) {
81f6c7f8 2712 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
f453ba04
DA		 2713 if (get_user(out_id, &set_connectors_ptr[i])) {
2714 ret = -EFAULT;
2715 goto out;
2716 }
2717
a2b34e22
RC		 2718 connector = drm_connector_find(dev, out_id);
2719 if (!connector) {
58367ed6
ZY		 2720 DRM_DEBUG_KMS("Connector id %d unknown\n",
2721 out_id);
f27657f2 2722 ret = -ENOENT;
f453ba04
DA		 2723 goto out;
2724 }
9440106b
JG		 2725 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2726 connector->base.id,
25933820 2727 connector->name);
f453ba04
DA		 2728
2729 connector_set[i] = connector;
2730 }
2731 }
2732
2733 set.crtc = crtc;
2734 set.x = crtc_req->x;
2735 set.y = crtc_req->y;
2736 set.mode = mode;
2737 set.connectors = connector_set;
2738 set.num_connectors = crtc_req->count_connectors;
5ef5f72f 2739 set.fb = fb;
2d13b679 2740 ret = drm_mode_set_config_internal(&set);
f453ba04
DA		 2741
2742out:
b0d12325
DV		 2743 if (fb)
2744 drm_framebuffer_unreference(fb);
2745
f453ba04 2746 kfree(connector_set);
ee34ab5b 2747 drm_mode_destroy(dev, mode);
84849903 2748 drm_modeset_unlock_all(dev);
f453ba04
DA		 2749 return ret;
2750}
2751
161d0dc1
MR		 2752/**
2753 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a
2754 * universal plane handler call
2755 * @crtc: crtc to update cursor for
2756 * @req: data pointer for the ioctl
2757 * @file_priv: drm file for the ioctl call
2758 *
2759 * Legacy cursor ioctl's work directly with driver buffer handles. To
2760 * translate legacy ioctl calls into universal plane handler calls, we need to
2761 * wrap the native buffer handle in a drm_framebuffer.
2762 *
2763 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB
2764 * buffer with a pitch of 4*width; the universal plane interface should be used
2765 * directly in cases where the hardware can support other buffer settings and
2766 * userspace wants to make use of these capabilities.
2767 *
2768 * Returns:
1a498633 2769 * Zero on success, negative errno on failure.
161d0dc1
MR		 2770 */
2771static int drm_mode_cursor_universal(struct drm_crtc *crtc,
2772 struct drm_mode_cursor2 *req,
2773 struct drm_file *file_priv)
2774{
2775 struct drm_device *dev = crtc->dev;
2776 struct drm_framebuffer *fb = NULL;
2777 struct drm_mode_fb_cmd2 fbreq = {
2778 .width = req->width,
2779 .height = req->height,
2780 .pixel_format = DRM_FORMAT_ARGB8888,
2781 .pitches = { req->width * 4 },
2782 .handles = { req->handle },
2783 };
2784 int32_t crtc_x, crtc_y;
2785 uint32_t crtc_w = 0, crtc_h = 0;
2786 uint32_t src_w = 0, src_h = 0;
2787 int ret = 0;
2788
2789 BUG_ON(!crtc->cursor);
f2b50c11 2790 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
161d0dc1
MR		 2791
2792 /*
2793 * Obtain fb we'll be using (either new or existing) and take an extra
2794 * reference to it if fb != null. setplane will take care of dropping
2795 * the reference if the plane update fails.
2796 */
2797 if (req->flags & DRM_MODE_CURSOR_BO) {
2798 if (req->handle) {
9a6f5130 2799 fb = internal_framebuffer_create(dev, &fbreq, file_priv);
161d0dc1
MR		 2800 if (IS_ERR(fb)) {
2801 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
2802 return PTR_ERR(fb);
2803 }
161d0dc1
MR		 2804 } else {
2805 fb = NULL;
2806 }
2807 } else {
161d0dc1
MR		 2808 fb = crtc->cursor->fb;
2809 if (fb)
2810 drm_framebuffer_reference(fb);
161d0dc1
MR		 2811 }
2812
2813 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2814 crtc_x = req->x;
2815 crtc_y = req->y;
2816 } else {
2817 crtc_x = crtc->cursor_x;
2818 crtc_y = crtc->cursor_y;
2819 }
2820
2821 if (fb) {
2822 crtc_w = fb->width;
2823 crtc_h = fb->height;
2824 src_w = fb->width << 16;
2825 src_h = fb->height << 16;
2826 }
2827
2828 /*
2829 * setplane_internal will take care of deref'ing either the old or new
2830 * framebuffer depending on success.
2831 */
f2b50c11 2832 ret = __setplane_internal(crtc->cursor, crtc, fb,
161d0dc1
MR		 2833 crtc_x, crtc_y, crtc_w, crtc_h,
2834 0, 0, src_w, src_h);
2835
2836 /* Update successful; save new cursor position, if necessary */
2837 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
2838 crtc->cursor_x = req->x;
2839 crtc->cursor_y = req->y;
2840 }
2841
2842 return ret;
2843}
2844
4c813d4d
DA		 2845static int drm_mode_cursor_common(struct drm_device *dev,
2846 struct drm_mode_cursor2 *req,
2847 struct drm_file *file_priv)
f453ba04 2848{
f453ba04
DA		 2849 struct drm_crtc *crtc;
2850 int ret = 0;
2851
fb3b06c8
DA		 2852 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2853 return -EINVAL;
2854
7c4eaca4 2855 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
f453ba04 2856 return -EINVAL;
f453ba04 2857
a2b34e22
RC		 2858 crtc = drm_crtc_find(dev, req->crtc_id);
2859 if (!crtc) {
58367ed6 2860 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
f27657f2 2861 return -ENOENT;
f453ba04 2862 }
f453ba04 2863
161d0dc1
MR		 2864 /*
2865 * If this crtc has a universal cursor plane, call that plane's update
2866 * handler rather than using legacy cursor handlers.
2867 */
4d02e2de 2868 drm_modeset_lock_crtc(crtc, crtc->cursor);
f2b50c11
DV		 2869 if (crtc->cursor) {
2870 ret = drm_mode_cursor_universal(crtc, req, file_priv);
2871 goto out;
2872 }
2873
f453ba04 2874 if (req->flags & DRM_MODE_CURSOR_BO) {
4c813d4d 2875 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
f453ba04
DA		 2876 ret = -ENXIO;
2877 goto out;
2878 }
2879 /* Turns off the cursor if handle is 0 */
4c813d4d
DA		 2880 if (crtc->funcs->cursor_set2)
2881 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
2882 req->width, req->height, req->hot_x, req->hot_y);
2883 else
2884 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2885 req->width, req->height);
f453ba04
DA		 2886 }
2887
2888 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2889 if (crtc->funcs->cursor_move) {
2890 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2891 } else {
f453ba04
DA		 2892 ret = -EFAULT;
2893 goto out;
2894 }
2895 }
2896out:
d059f652 2897 drm_modeset_unlock_crtc(crtc);
dac35663 2898
f453ba04 2899 return ret;
4c813d4d
DA		 2900
2901}
c8e32cc1
DV		 2902
2903
2904/**
2905 * drm_mode_cursor_ioctl - set CRTC's cursor configuration
2906 * @dev: drm device for the ioctl
2907 * @data: data pointer for the ioctl
2908 * @file_priv: drm file for the ioctl call
2909 *
2910 * Set the cursor configuration based on user request.
2911 *
2912 * Called by the user via ioctl.
2913 *
2914 * Returns:
1a498633 2915 * Zero on success, negative errno on failure.
c8e32cc1 2916 */
4c813d4d 2917int drm_mode_cursor_ioctl(struct drm_device *dev,
c8e32cc1 2918 void *data, struct drm_file *file_priv)
4c813d4d
DA		 2919{
2920 struct drm_mode_cursor *req = data;
2921 struct drm_mode_cursor2 new_req;
2922
2923 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
2924 new_req.hot_x = new_req.hot_y = 0;
2925
2926 return drm_mode_cursor_common(dev, &new_req, file_priv);
2927}
2928
c8e32cc1
DV		 2929/**
2930 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
2931 * @dev: drm device for the ioctl
2932 * @data: data pointer for the ioctl
2933 * @file_priv: drm file for the ioctl call
2934 *
2935 * Set the cursor configuration based on user request. This implements the 2nd
2936 * version of the cursor ioctl, which allows userspace to additionally specify
2937 * the hotspot of the pointer.
2938 *
2939 * Called by the user via ioctl.
2940 *
2941 * Returns:
1a498633 2942 * Zero on success, negative errno on failure.
c8e32cc1 2943 */
4c813d4d
DA		 2944int drm_mode_cursor2_ioctl(struct drm_device *dev,
2945 void *data, struct drm_file *file_priv)
2946{
2947 struct drm_mode_cursor2 *req = data;
4dfd909f 2948
4c813d4d 2949 return drm_mode_cursor_common(dev, req, file_priv);
f453ba04
DA		 2950}
2951
c8e32cc1
DV		 2952/**
2953 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
2954 * @bpp: bits per pixels
2955 * @depth: bit depth per pixel
2956 *
2957 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
2958 * Useful in fbdev emulation code, since that deals in those values.
2959 */
308e5bcb
JB		 2960uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2961{
2962 uint32_t fmt;
2963
2964 switch (bpp) {
2965 case 8:
d84f031b 2966 fmt = DRM_FORMAT_C8;
308e5bcb
JB		 2967 break;
2968 case 16:
2969 if (depth == 15)
04b3924d 2970 fmt = DRM_FORMAT_XRGB1555;
308e5bcb 2971 else
04b3924d 2972 fmt = DRM_FORMAT_RGB565;
308e5bcb
JB		 2973 break;
2974 case 24:
04b3924d 2975 fmt = DRM_FORMAT_RGB888;
308e5bcb
JB		 2976 break;
2977 case 32:
2978 if (depth == 24)
04b3924d 2979 fmt = DRM_FORMAT_XRGB8888;
308e5bcb 2980 else if (depth == 30)
04b3924d 2981 fmt = DRM_FORMAT_XRGB2101010;
308e5bcb 2982 else
04b3924d 2983 fmt = DRM_FORMAT_ARGB8888;
308e5bcb
JB		 2984 break;
2985 default:
04b3924d
VS		 2986 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
2987 fmt = DRM_FORMAT_XRGB8888;
308e5bcb
JB		 2988 break;
2989 }
2990
2991 return fmt;
2992}
2993EXPORT_SYMBOL(drm_mode_legacy_fb_format);
2994
f453ba04
DA		 2995/**
2996 * drm_mode_addfb - add an FB to the graphics configuration
065a50ed
DV		 2997 * @dev: drm device for the ioctl
2998 * @data: data pointer for the ioctl
2999 * @file_priv: drm file for the ioctl call
f453ba04 3000 *
c8e32cc1 3001 * Add a new FB to the specified CRTC, given a user request. This is the
209f5527 3002 * original addfb ioctl which only supported RGB formats.
f453ba04
DA		 3003 *
3004 * Called by the user via ioctl.
3005 *
c8e32cc1 3006 * Returns:
1a498633 3007 * Zero on success, negative errno on failure.
f453ba04
DA		 3008 */
3009int drm_mode_addfb(struct drm_device *dev,
3010 void *data, struct drm_file *file_priv)
3011{
308e5bcb
JB		 3012 struct drm_mode_fb_cmd *or = data;
3013 struct drm_mode_fb_cmd2 r = {};
228f2cb3 3014 int ret;
308e5bcb 3015
228f2cb3 3016 /* convert to new format and call new ioctl */
308e5bcb
JB		 3017 r.fb_id = or->fb_id;
3018 r.width = or->width;
3019 r.height = or->height;
3020 r.pitches[0] = or->pitch;
3021 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
3022 r.handles[0] = or->handle;
3023
228f2cb3
CE		 3024 ret = drm_mode_addfb2(dev, &r, file_priv);
3025 if (ret)
3026 return ret;
308e5bcb 3027
228f2cb3 3028 or->fb_id = r.fb_id;
4b096ac1 3029
baf698b0 3030 return 0;
308e5bcb
JB		 3031}
3032
cff91b62 3033static int format_check(const struct drm_mode_fb_cmd2 *r)
935b5977
VS		 3034{
3035 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
3036
3037 switch (format) {
3038 case DRM_FORMAT_C8:
3039 case DRM_FORMAT_RGB332:
3040 case DRM_FORMAT_BGR233:
3041 case DRM_FORMAT_XRGB4444:
3042 case DRM_FORMAT_XBGR4444:
3043 case DRM_FORMAT_RGBX4444:
3044 case DRM_FORMAT_BGRX4444:
3045 case DRM_FORMAT_ARGB4444:
3046 case DRM_FORMAT_ABGR4444:
3047 case DRM_FORMAT_RGBA4444:
3048 case DRM_FORMAT_BGRA4444:
3049 case DRM_FORMAT_XRGB1555:
3050 case DRM_FORMAT_XBGR1555:
3051 case DRM_FORMAT_RGBX5551:
3052 case DRM_FORMAT_BGRX5551:
3053 case DRM_FORMAT_ARGB1555:
3054 case DRM_FORMAT_ABGR1555:
3055 case DRM_FORMAT_RGBA5551:
3056 case DRM_FORMAT_BGRA5551:
3057 case DRM_FORMAT_RGB565:
3058 case DRM_FORMAT_BGR565:
3059 case DRM_FORMAT_RGB888:
3060 case DRM_FORMAT_BGR888:
3061 case DRM_FORMAT_XRGB8888:
3062 case DRM_FORMAT_XBGR8888:
3063 case DRM_FORMAT_RGBX8888:
3064 case DRM_FORMAT_BGRX8888:
3065 case DRM_FORMAT_ARGB8888:
3066 case DRM_FORMAT_ABGR8888:
3067 case DRM_FORMAT_RGBA8888:
3068 case DRM_FORMAT_BGRA8888:
3069 case DRM_FORMAT_XRGB2101010:
3070 case DRM_FORMAT_XBGR2101010:
3071 case DRM_FORMAT_RGBX1010102:
3072 case DRM_FORMAT_BGRX1010102:
3073 case DRM_FORMAT_ARGB2101010:
3074 case DRM_FORMAT_ABGR2101010:
3075 case DRM_FORMAT_RGBA1010102:
3076 case DRM_FORMAT_BGRA1010102:
3077 case DRM_FORMAT_YUYV:
3078 case DRM_FORMAT_YVYU:
3079 case DRM_FORMAT_UYVY:
3080 case DRM_FORMAT_VYUY:
3081 case DRM_FORMAT_AYUV:
3082 case DRM_FORMAT_NV12:
3083 case DRM_FORMAT_NV21:
3084 case DRM_FORMAT_NV16:
3085 case DRM_FORMAT_NV61:
ba623f6a
LP		 3086 case DRM_FORMAT_NV24:
3087 case DRM_FORMAT_NV42:
935b5977
VS		 3088 case DRM_FORMAT_YUV410:
3089 case DRM_FORMAT_YVU410:
3090 case DRM_FORMAT_YUV411:
3091 case DRM_FORMAT_YVU411:
3092 case DRM_FORMAT_YUV420:
3093 case DRM_FORMAT_YVU420:
3094 case DRM_FORMAT_YUV422:
3095 case DRM_FORMAT_YVU422:
3096 case DRM_FORMAT_YUV444:
3097 case DRM_FORMAT_YVU444:
3098 return 0;
3099 default:
23c453a4
VS		 3100 DRM_DEBUG_KMS("invalid pixel format %s\n",
3101 drm_get_format_name(r->pixel_format));
935b5977
VS		 3102 return -EINVAL;
3103 }
3104}
3105
cff91b62 3106static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
d1b45d5f
VS		 3107{
3108 int ret, hsub, vsub, num_planes, i;
3109
3110 ret = format_check(r);
3111 if (ret) {
6ba6d03e
VS		 3112 DRM_DEBUG_KMS("bad framebuffer format %s\n",
3113 drm_get_format_name(r->pixel_format));
d1b45d5f
VS		 3114 return ret;
3115 }
3116
3117 hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
3118 vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
3119 num_planes = drm_format_num_planes(r->pixel_format);
3120
3121 if (r->width == 0 || r->width % hsub) {
209f5527 3122 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
d1b45d5f
VS		 3123 return -EINVAL;
3124 }
3125
3126 if (r->height == 0 || r->height % vsub) {
1aa1b11c 3127 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
d1b45d5f
VS		 3128 return -EINVAL;
3129 }
3130
3131 for (i = 0; i < num_planes; i++) {
3132 unsigned int width = r->width / (i != 0 ? hsub : 1);
b180b5d1
VS		 3133 unsigned int height = r->height / (i != 0 ? vsub : 1);
3134 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
d1b45d5f
VS		 3135
3136 if (!r->handles[i]) {
1aa1b11c 3137 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
d1b45d5f
VS		 3138 return -EINVAL;
3139 }
3140
b180b5d1
VS		 3141 if ((uint64_t) width * cpp > UINT_MAX)
3142 return -ERANGE;
3143
3144 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
3145 return -ERANGE;
3146
3147 if (r->pitches[i] < width * cpp) {
1aa1b11c 3148 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
d1b45d5f
VS		 3149 return -EINVAL;
3150 }
e3eb3250
RC		 3151
3152 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
3153 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
3154 r->modifier[i], i);
3155 return -EINVAL;
3156 }
570655b0
RC		 3157
3158 /* modifier specific checks: */
3159 switch (r->modifier[i]) {
3160 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
3161 /* NOTE: the pitch restriction may be lifted later if it turns
3162 * out that no hw has this restriction:
3163 */
3164 if (r->pixel_format != DRM_FORMAT_NV12 ||
3165 width % 128 || height % 32 ||
3166 r->pitches[i] % 128) {
3167 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
3168 return -EINVAL;
3169 }
3170 break;
3171
3172 default:
3173 break;
3174 }
d1b45d5f
VS		 3175 }
3176
bbe16a40
DV		 3177 for (i = num_planes; i < 4; i++) {
3178 if (r->modifier[i]) {
3179 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
3180 return -EINVAL;
3181 }
3182
3183 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
3184 if (!(r->flags & DRM_MODE_FB_MODIFIERS))
3185 continue;
3186
3187 if (r->handles[i]) {
3188 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
3189 return -EINVAL;
3190 }
3191
3192 if (r->pitches[i]) {
3193 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
3194 return -EINVAL;
3195 }
3196
3197 if (r->offsets[i]) {
3198 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
3199 return -EINVAL;
3200 }
3201 }
3202
d1b45d5f
VS		 3203 return 0;
3204}
3205
9a6f5130
CW		 3206static struct drm_framebuffer *
3207internal_framebuffer_create(struct drm_device *dev,
3208 struct drm_mode_fb_cmd2 *r,
3209 struct drm_file *file_priv)
308e5bcb 3210{
f453ba04
DA		 3211 struct drm_mode_config *config = &dev->mode_config;
3212 struct drm_framebuffer *fb;
4a1b0714 3213 int ret;
f453ba04 3214
e3eb3250 3215 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
e3cc3520 3216 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
c394c2b0 3217 return ERR_PTR(-EINVAL);
e3cc3520
VS		 3218 }
3219
f453ba04 3220 if ((config->min_width > r->width) || (r->width > config->max_width)) {
1aa1b11c 3221 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
8cf5c917 3222 r->width, config->min_width, config->max_width);
c394c2b0 3223 return ERR_PTR(-EINVAL);
f453ba04
DA		 3224 }
3225 if ((config->min_height > r->height) || (r->height > config->max_height)) {
1aa1b11c 3226 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
8cf5c917 3227 r->height, config->min_height, config->max_height);
c394c2b0 3228 return ERR_PTR(-EINVAL);
f453ba04
DA		 3229 }
3230
e3eb3250
RC		 3231 if (r->flags & DRM_MODE_FB_MODIFIERS &&
3232 !dev->mode_config.allow_fb_modifiers) {
3233 DRM_DEBUG_KMS("driver does not support fb modifiers\n");
3234 return ERR_PTR(-EINVAL);
3235 }
3236
d1b45d5f
VS		 3237 ret = framebuffer_check(r);
3238 if (ret)
c394c2b0 3239 return ERR_PTR(ret);
935b5977 3240
f453ba04 3241 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
cce13ff7 3242 if (IS_ERR(fb)) {
1aa1b11c 3243 DRM_DEBUG_KMS("could not create framebuffer\n");
c394c2b0 3244 return fb;
f453ba04
DA		 3245 }
3246
c394c2b0
MR		 3247 return fb;
3248}
4b096ac1 3249
c394c2b0
MR		 3250/**
3251 * drm_mode_addfb2 - add an FB to the graphics configuration
3252 * @dev: drm device for the ioctl
3253 * @data: data pointer for the ioctl
3254 * @file_priv: drm file for the ioctl call
3255 *
3256 * Add a new FB to the specified CRTC, given a user request with format. This is
3257 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
3258 * and uses fourcc codes as pixel format specifiers.
3259 *
3260 * Called by the user via ioctl.
3261 *
3262 * Returns:
1a498633 3263 * Zero on success, negative errno on failure.
c394c2b0
MR		 3264 */
3265int drm_mode_addfb2(struct drm_device *dev,
3266 void *data, struct drm_file *file_priv)
3267{
9a6f5130 3268 struct drm_mode_fb_cmd2 *r = data;
c394c2b0
MR		 3269 struct drm_framebuffer *fb;
3270
3271 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3272 return -EINVAL;
3273
9a6f5130 3274 fb = internal_framebuffer_create(dev, r, file_priv);
c394c2b0
MR		 3275 if (IS_ERR(fb))
3276 return PTR_ERR(fb);
3277
9a6f5130
CW		 3278 /* Transfer ownership to the filp for reaping on close */
3279
3280 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
3281 mutex_lock(&file_priv->fbs_lock);
3282 r->fb_id = fb->base.id;
3283 list_add(&fb->filp_head, &file_priv->fbs);
3284 mutex_unlock(&file_priv->fbs_lock);
3285
c394c2b0 3286 return 0;
f453ba04
DA		 3287}
3288
3289/**
3290 * drm_mode_rmfb - remove an FB from the configuration
065a50ed
DV		 3291 * @dev: drm device for the ioctl
3292 * @data: data pointer for the ioctl
3293 * @file_priv: drm file for the ioctl call
f453ba04 3294 *
f453ba04
DA		 3295 * Remove the FB specified by the user.
3296 *
3297 * Called by the user via ioctl.
3298 *
c8e32cc1 3299 * Returns:
1a498633 3300 * Zero on success, negative errno on failure.
f453ba04
DA		 3301 */
3302int drm_mode_rmfb(struct drm_device *dev,
3303 void *data, struct drm_file *file_priv)
3304{
f453ba04
DA		 3305 struct drm_framebuffer *fb = NULL;
3306 struct drm_framebuffer *fbl = NULL;
3307 uint32_t *id = data;
f453ba04
DA		 3308 int found = 0;
3309
fb3b06c8
DA		 3310 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3311 return -EINVAL;
3312
4b096ac1 3313 mutex_lock(&file_priv->fbs_lock);
2b677e8c
DV		 3314 mutex_lock(&dev->mode_config.fb_lock);
3315 fb = __drm_framebuffer_lookup(dev, *id);
3316 if (!fb)
3317 goto fail_lookup;
3318
f453ba04
DA		 3319 list_for_each_entry(fbl, &file_priv->fbs, filp_head)
3320 if (fb == fbl)
3321 found = 1;
2b677e8c
DV		 3322 if (!found)
3323 goto fail_lookup;
3324
4b096ac1 3325 list_del_init(&fb->filp_head);
2b677e8c 3326 mutex_unlock(&dev->mode_config.fb_lock);
4b096ac1 3327 mutex_unlock(&file_priv->fbs_lock);
f453ba04 3328
13803132 3329 drm_framebuffer_unreference(fb);
4b096ac1 3330
2b677e8c
DV		 3331 return 0;
3332
3333fail_lookup:
3334 mutex_unlock(&dev->mode_config.fb_lock);
3335 mutex_unlock(&file_priv->fbs_lock);
3336
37c4e705 3337 return -ENOENT;
f453ba04
DA		 3338}
3339
3340/**
3341 * drm_mode_getfb - get FB info
065a50ed
DV		 3342 * @dev: drm device for the ioctl
3343 * @data: data pointer for the ioctl
3344 * @file_priv: drm file for the ioctl call
f453ba04 3345 *
f453ba04
DA		 3346 * Lookup the FB given its ID and return info about it.
3347 *
3348 * Called by the user via ioctl.
3349 *
c8e32cc1 3350 * Returns:
1a498633 3351 * Zero on success, negative errno on failure.
f453ba04
DA		 3352 */
3353int drm_mode_getfb(struct drm_device *dev,
3354 void *data, struct drm_file *file_priv)
3355{
3356 struct drm_mode_fb_cmd *r = data;
f453ba04 3357 struct drm_framebuffer *fb;
58c0dca1 3358 int ret;
f453ba04 3359
fb3b06c8
DA		 3360 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3361 return -EINVAL;
3362
786b99ed 3363 fb = drm_framebuffer_lookup(dev, r->fb_id);
58c0dca1 3364 if (!fb)
37c4e705 3365 return -ENOENT;
f453ba04
DA		 3366
3367 r->height = fb->height;
3368 r->width = fb->width;
3369 r->depth = fb->depth;
3370 r->bpp = fb->bits_per_pixel;
01f2c773 3371 r->pitch = fb->pitches[0];
101b96f3 3372 if (fb->funcs->create_handle) {
09f308f7 3373 if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
43683057 3374 drm_is_control_client(file_priv)) {
101b96f3
DH		 3375 ret = fb->funcs->create_handle(fb, file_priv,
3376 &r->handle);
3377 } else {
3378 /* GET_FB() is an unprivileged ioctl so we must not
3379 * return a buffer-handle to non-master processes! For
3380 * backwards-compatibility reasons, we cannot make
3381 * GET_FB() privileged, so just return an invalid handle
3382 * for non-masters. */
3383 r->handle = 0;
3384 ret = 0;
3385 }
3386 } else {
af26ef3b 3387 ret = -ENODEV;
101b96f3 3388 }
f453ba04 3389
58c0dca1
DV		 3390 drm_framebuffer_unreference(fb);
3391
f453ba04
DA		 3392 return ret;
3393}
3394
c8e32cc1
DV		 3395/**
3396 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
3397 * @dev: drm device for the ioctl
3398 * @data: data pointer for the ioctl
3399 * @file_priv: drm file for the ioctl call
3400 *
3401 * Lookup the FB and flush out the damaged area supplied by userspace as a clip
3402 * rectangle list. Generic userspace which does frontbuffer rendering must call
3403 * this ioctl to flush out the changes on manual-update display outputs, e.g.
3404 * usb display-link, mipi manual update panels or edp panel self refresh modes.
3405 *
3406 * Modesetting drivers which always update the frontbuffer do not need to
3407 * implement the corresponding ->dirty framebuffer callback.
3408 *
3409 * Called by the user via ioctl.
3410 *
3411 * Returns:
1a498633 3412 * Zero on success, negative errno on failure.
c8e32cc1 3413 */
884840aa
JB		 3414int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
3415 void *data, struct drm_file *file_priv)
3416{
3417 struct drm_clip_rect __user *clips_ptr;
3418 struct drm_clip_rect *clips = NULL;
3419 struct drm_mode_fb_dirty_cmd *r = data;
884840aa
JB		 3420 struct drm_framebuffer *fb;
3421 unsigned flags;
3422 int num_clips;
4a1b0714 3423 int ret;
884840aa 3424
fb3b06c8
DA		 3425 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3426 return -EINVAL;
3427
786b99ed 3428 fb = drm_framebuffer_lookup(dev, r->fb_id);
4ccf097f 3429 if (!fb)
37c4e705 3430 return -ENOENT;
884840aa
JB		 3431
3432 num_clips = r->num_clips;
81f6c7f8 3433 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
884840aa
JB		 3434
3435 if (!num_clips != !clips_ptr) {
3436 ret = -EINVAL;
3437 goto out_err1;
3438 }
3439
3440 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
3441
3442 /* If userspace annotates copy, clips must come in pairs */
3443 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
3444 ret = -EINVAL;
3445 goto out_err1;
3446 }
3447
3448 if (num_clips && clips_ptr) {
a5cd3351
XW		 3449 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
3450 ret = -EINVAL;
3451 goto out_err1;
3452 }
bd3f0ff9 3453 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
884840aa
JB		 3454 if (!clips) {
3455 ret = -ENOMEM;
3456 goto out_err1;
3457 }
3458
3459 ret = copy_from_user(clips, clips_ptr,
3460 num_clips * sizeof(*clips));
e902a358
DC		 3461 if (ret) {
3462 ret = -EFAULT;
884840aa 3463 goto out_err2;
e902a358 3464 }
884840aa
JB		 3465 }
3466
3467 if (fb->funcs->dirty) {
02b00162
TH		 3468 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
3469 clips, num_clips);
884840aa
JB		 3470 } else {
3471 ret = -ENOSYS;
884840aa
JB		 3472 }
3473
3474out_err2:
3475 kfree(clips);
3476out_err1:
4ccf097f
DV		 3477 drm_framebuffer_unreference(fb);
3478
884840aa
JB		 3479 return ret;
3480}
3481
3482
f453ba04
DA		 3483/**
3484 * drm_fb_release - remove and free the FBs on this file
065a50ed 3485 * @priv: drm file for the ioctl
f453ba04 3486 *
f453ba04
DA		 3487 * Destroy all the FBs associated with @filp.
3488 *
3489 * Called by the user via ioctl.
3490 *
c8e32cc1 3491 * Returns:
1a498633 3492 * Zero on success, negative errno on failure.
f453ba04 3493 */
ea39f835 3494void drm_fb_release(struct drm_file *priv)
f453ba04 3495{
f453ba04
DA		 3496 struct drm_framebuffer *fb, *tfb;
3497
1b116297
DV		 3498 /*
3499 * When the file gets released that means no one else can access the fb
e2db726b 3500 * list any more, so no need to grab fpriv->fbs_lock. And we need to
1b116297
DV		 3501 * avoid upsetting lockdep since the universal cursor code adds a
3502 * framebuffer while holding mutex locks.
3503 *
3504 * Note that a real deadlock between fpriv->fbs_lock and the modeset
3505 * locks is impossible here since no one else but this function can get
3506 * at it any more.
3507 */
f453ba04 3508 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
4b096ac1 3509 list_del_init(&fb->filp_head);
2b677e8c 3510
73f7570b 3511 /* This drops the fpriv->fbs reference. */
13803132 3512 drm_framebuffer_unreference(fb);
f453ba04 3513 }
f453ba04
DA		 3514}
3515
c8e32cc1
DV		 3516/**
3517 * drm_property_create - create a new property type
3518 * @dev: drm device
3519 * @flags: flags specifying the property type
3520 * @name: name of the property
3521 * @num_values: number of pre-defined values
3522 *
3523 * This creates a new generic drm property which can then be attached to a drm
3524 * object with drm_object_attach_property. The returned property object must be
3525 * freed with drm_property_destroy.
3526 *
3b5b9932
DL		 3527 * Note that the DRM core keeps a per-device list of properties and that, if
3528 * drm_mode_config_cleanup() is called, it will destroy all properties created
3529 * by the driver.
3530 *
c8e32cc1
DV		 3531 * Returns:
3532 * A pointer to the newly created property on success, NULL on failure.
3533 */
f453ba04
DA		 3534struct drm_property *drm_property_create(struct drm_device *dev, int flags,
3535 const char *name, int num_values)
3536{
3537 struct drm_property *property = NULL;
6bfc56aa 3538 int ret;
f453ba04
DA		 3539
3540 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
3541 if (!property)
3542 return NULL;
3543
98f75de4
RC		 3544 property->dev = dev;
3545
f453ba04 3546 if (num_values) {
bd3f0ff9
TR		 3547 property->values = kcalloc(num_values, sizeof(uint64_t),
3548 GFP_KERNEL);
f453ba04
DA		 3549 if (!property->values)
3550 goto fail;
3551 }
3552
6bfc56aa
VS		 3553 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
3554 if (ret)
3555 goto fail;
3556
f453ba04
DA		 3557 property->flags = flags;
3558 property->num_values = num_values;
3758b341 3559 INIT_LIST_HEAD(&property->enum_list);
f453ba04 3560
471dd2ef 3561 if (name) {
f453ba04 3562 strncpy(property->name, name, DRM_PROP_NAME_LEN);
471dd2ef
VL		 3563 property->name[DRM_PROP_NAME_LEN-1] = '\0';
3564 }
f453ba04
DA		 3565
3566 list_add_tail(&property->head, &dev->mode_config.property_list);
5ea22f24
RC		 3567
3568 WARN_ON(!drm_property_type_valid(property));
3569
f453ba04
DA		 3570 return property;
3571fail:
6bfc56aa 3572 kfree(property->values);
f453ba04
DA		 3573 kfree(property);
3574 return NULL;
3575}
3576EXPORT_SYMBOL(drm_property_create);
3577
c8e32cc1 3578/**
2aa9d2bc 3579 * drm_property_create_enum - create a new enumeration property type
c8e32cc1
DV		 3580 * @dev: drm device
3581 * @flags: flags specifying the property type
3582 * @name: name of the property
3583 * @props: enumeration lists with property values
3584 * @num_values: number of pre-defined values
3585 *
3586 * This creates a new generic drm property which can then be attached to a drm
3587 * object with drm_object_attach_property. The returned property object must be
3588 * freed with drm_property_destroy.
3589 *
3590 * Userspace is only allowed to set one of the predefined values for enumeration
3591 * properties.
3592 *
3593 * Returns:
3594 * A pointer to the newly created property on success, NULL on failure.
3595 */
4a67d391
SH		 3596struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
3597 const char *name,
3598 const struct drm_prop_enum_list *props,
3599 int num_values)
3600{
3601 struct drm_property *property;
3602 int i, ret;
3603
3604 flags |= DRM_MODE_PROP_ENUM;
3605
3606 property = drm_property_create(dev, flags, name, num_values);
3607 if (!property)
3608 return NULL;
3609
3610 for (i = 0; i < num_values; i++) {
3611 ret = drm_property_add_enum(property, i,
3612 props[i].type,
3613 props[i].name);
3614 if (ret) {
3615 drm_property_destroy(dev, property);
3616 return NULL;
3617 }
3618 }
3619
3620 return property;
3621}
3622EXPORT_SYMBOL(drm_property_create_enum);
3623
c8e32cc1 3624/**
2aa9d2bc 3625 * drm_property_create_bitmask - create a new bitmask property type
c8e32cc1
DV		 3626 * @dev: drm device
3627 * @flags: flags specifying the property type
3628 * @name: name of the property
3629 * @props: enumeration lists with property bitflags
295ee853
DV		 3630 * @num_props: size of the @props array
3631 * @supported_bits: bitmask of all supported enumeration values
c8e32cc1 3632 *
295ee853 3633 * This creates a new bitmask drm property which can then be attached to a drm
c8e32cc1
DV		 3634 * object with drm_object_attach_property. The returned property object must be
3635 * freed with drm_property_destroy.
3636 *
3637 * Compared to plain enumeration properties userspace is allowed to set any
3638 * or'ed together combination of the predefined property bitflag values
3639 *
3640 * Returns:
3641 * A pointer to the newly created property on success, NULL on failure.
3642 */
49e27545
RC		 3643struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
3644 int flags, const char *name,
3645 const struct drm_prop_enum_list *props,
7689ffb3
VS		 3646 int num_props,
3647 uint64_t supported_bits)
49e27545
RC		 3648{
3649 struct drm_property *property;
7689ffb3
VS		 3650 int i, ret, index = 0;
3651 int num_values = hweight64(supported_bits);
49e27545
RC		 3652
3653 flags |= DRM_MODE_PROP_BITMASK;
3654
3655 property = drm_property_create(dev, flags, name, num_values);
3656 if (!property)
3657 return NULL;
7689ffb3
VS		 3658 for (i = 0; i < num_props; i++) {
3659 if (!(supported_bits & (1ULL << props[i].type)))
3660 continue;
49e27545 3661
7689ffb3
VS		 3662 if (WARN_ON(index >= num_values)) {
3663 drm_property_destroy(dev, property);
3664 return NULL;
3665 }
3666
3667 ret = drm_property_add_enum(property, index++,
49e27545
RC		 3668 props[i].type,
3669 props[i].name);
3670 if (ret) {
3671 drm_property_destroy(dev, property);
3672 return NULL;
3673 }
3674 }
3675
3676 return property;
3677}
3678EXPORT_SYMBOL(drm_property_create_bitmask);
3679
ebc44cf3
RC		 3680static struct drm_property *property_create_range(struct drm_device *dev,
3681 int flags, const char *name,
3682 uint64_t min, uint64_t max)
3683{
3684 struct drm_property *property;
3685
3686 property = drm_property_create(dev, flags, name, 2);
3687 if (!property)
3688 return NULL;
3689
3690 property->values[0] = min;
3691 property->values[1] = max;
3692
3693 return property;
3694}
3695
c8e32cc1 3696/**
960cd9d4 3697 * drm_property_create_range - create a new unsigned ranged property type
c8e32cc1
DV		 3698 * @dev: drm device
3699 * @flags: flags specifying the property type
3700 * @name: name of the property
3701 * @min: minimum value of the property
3702 * @max: maximum value of the property
3703 *
3704 * This creates a new generic drm property which can then be attached to a drm
3705 * object with drm_object_attach_property. The returned property object must be
3706 * freed with drm_property_destroy.
3707 *
960cd9d4
DV		 3708 * Userspace is allowed to set any unsigned integer value in the (min, max)
3709 * range inclusive.
c8e32cc1
DV		 3710 *
3711 * Returns:
3712 * A pointer to the newly created property on success, NULL on failure.
3713 */
d9bc3c02
SH		 3714struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
3715 const char *name,
3716 uint64_t min, uint64_t max)
3717{
ebc44cf3
RC		 3718 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags,
3719 name, min, max);
d9bc3c02
SH		 3720}
3721EXPORT_SYMBOL(drm_property_create_range);
3722
960cd9d4
DV		 3723/**
3724 * drm_property_create_signed_range - create a new signed ranged property type
3725 * @dev: drm device
3726 * @flags: flags specifying the property type
3727 * @name: name of the property
3728 * @min: minimum value of the property
3729 * @max: maximum value of the property
3730 *
3731 * This creates a new generic drm property which can then be attached to a drm
3732 * object with drm_object_attach_property. The returned property object must be
3733 * freed with drm_property_destroy.
3734 *
3735 * Userspace is allowed to set any signed integer value in the (min, max)
3736 * range inclusive.
3737 *
3738 * Returns:
3739 * A pointer to the newly created property on success, NULL on failure.
3740 */
ebc44cf3
RC		 3741struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
3742 int flags, const char *name,
3743 int64_t min, int64_t max)
3744{
3745 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags,
3746 name, I642U64(min), I642U64(max));
3747}
3748EXPORT_SYMBOL(drm_property_create_signed_range);
3749
960cd9d4
DV		 3750/**
3751 * drm_property_create_object - create a new object property type
3752 * @dev: drm device
3753 * @flags: flags specifying the property type
3754 * @name: name of the property
3755 * @type: object type from DRM_MODE_OBJECT_* defines
3756 *
3757 * This creates a new generic drm property which can then be attached to a drm
3758 * object with drm_object_attach_property. The returned property object must be
3759 * freed with drm_property_destroy.
3760 *
3761 * Userspace is only allowed to set this to any property value of the given
3762 * @type. Only useful for atomic properties, which is enforced.
3763 *
3764 * Returns:
3765 * A pointer to the newly created property on success, NULL on failure.
3766 */
98f75de4
RC		 3767struct drm_property *drm_property_create_object(struct drm_device *dev,
3768 int flags, const char *name, uint32_t type)
3769{
3770 struct drm_property *property;
3771
3772 flags |= DRM_MODE_PROP_OBJECT;
3773
960cd9d4
DV		 3774 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC)))
3775 return NULL;
3776
98f75de4
RC		 3777 property = drm_property_create(dev, flags, name, 1);
3778 if (!property)
3779 return NULL;
3780
3781 property->values[0] = type;
3782
3783 return property;
3784}
3785EXPORT_SYMBOL(drm_property_create_object);
3786
960cd9d4
DV		 3787/**
3788 * drm_property_create_bool - create a new boolean property type
3789 * @dev: drm device
3790 * @flags: flags specifying the property type
3791 * @name: name of the property
3792 *
3793 * This creates a new generic drm property which can then be attached to a drm
3794 * object with drm_object_attach_property. The returned property object must be
3795 * freed with drm_property_destroy.
3796 *
3797 * This is implemented as a ranged property with only {0, 1} as valid values.
3798 *
3799 * Returns:
3800 * A pointer to the newly created property on success, NULL on failure.
3801 */
3802struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags,
3803 const char *name)
3804{
3805 return drm_property_create_range(dev, flags, name, 0, 1);
3806}
3807EXPORT_SYMBOL(drm_property_create_bool);
3808
c8e32cc1
DV		 3809/**
3810 * drm_property_add_enum - add a possible value to an enumeration property
3811 * @property: enumeration property to change
3812 * @index: index of the new enumeration
3813 * @value: value of the new enumeration
3814 * @name: symbolic name of the new enumeration
3815 *
3816 * This functions adds enumerations to a property.
3817 *
3818 * It's use is deprecated, drivers should use one of the more specific helpers
3819 * to directly create the property with all enumerations already attached.
3820 *
3821 * Returns:
3822 * Zero on success, error code on failure.
3823 */
f453ba04
DA		 3824int drm_property_add_enum(struct drm_property *property, int index,
3825 uint64_t value, const char *name)
3826{
3827 struct drm_property_enum *prop_enum;
3828
5ea22f24
RC		 3829 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
3830 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
49e27545
RC		 3831 return -EINVAL;
3832
3833 /*
3834 * Bitmask enum properties have the additional constraint of values
3835 * from 0 to 63
3836 */
5ea22f24
RC		 3837 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
3838 (value > 63))
f453ba04
DA		 3839 return -EINVAL;
3840
3758b341
DV		 3841 if (!list_empty(&property->enum_list)) {
3842 list_for_each_entry(prop_enum, &property->enum_list, head) {
f453ba04
DA		 3843 if (prop_enum->value == value) {
3844 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3845 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3846 return 0;
3847 }
3848 }
3849 }
3850
3851 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
3852 if (!prop_enum)
3853 return -ENOMEM;
3854
3855 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3856 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3857 prop_enum->value = value;
3858
3859 property->values[index] = value;
3758b341 3860 list_add_tail(&prop_enum->head, &property->enum_list);
f453ba04
DA		 3861 return 0;
3862}
3863EXPORT_SYMBOL(drm_property_add_enum);
3864
c8e32cc1
DV		 3865/**
3866 * drm_property_destroy - destroy a drm property
3867 * @dev: drm device
3868 * @property: property to destry
3869 *
3870 * This function frees a property including any attached resources like
3871 * enumeration values.
3872 */
f453ba04
DA		 3873void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
3874{
3875 struct drm_property_enum *prop_enum, *pt;
3876
3758b341 3877 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) {
f453ba04
DA		 3878 list_del(&prop_enum->head);
3879 kfree(prop_enum);
3880 }
3881
3882 if (property->num_values)
3883 kfree(property->values);
3884 drm_mode_object_put(dev, &property->base);
3885 list_del(&property->head);
3886 kfree(property);
3887}
3888EXPORT_SYMBOL(drm_property_destroy);
3889
c8e32cc1
DV		 3890/**
3891 * drm_object_attach_property - attach a property to a modeset object
3892 * @obj: drm modeset object
3893 * @property: property to attach
3894 * @init_val: initial value of the property
3895 *
3896 * This attaches the given property to the modeset object with the given initial
3897 * value. Currently this function cannot fail since the properties are stored in
3898 * a statically sized array.
3899 */
c543188a
PZ		 3900void drm_object_attach_property(struct drm_mode_object *obj,
3901 struct drm_property *property,
3902 uint64_t init_val)
3903{
7f88a9be 3904 int count = obj->properties->count;
c543188a 3905
7f88a9be
PZ		 3906 if (count == DRM_OBJECT_MAX_PROPERTY) {
3907 WARN(1, "Failed to attach object property (type: 0x%x). Please "
3908 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
3909 "you see this message on the same object type.\n",
3910 obj->type);
3911 return;
c543188a
PZ		 3912 }
3913
b17cd757 3914 obj->properties->properties[count] = property;
7f88a9be
PZ		 3915 obj->properties->values[count] = init_val;
3916 obj->properties->count++;
88a48e29
RC		 3917 if (property->flags & DRM_MODE_PROP_ATOMIC)
3918 obj->properties->atomic_count++;
c543188a
PZ		 3919}
3920EXPORT_SYMBOL(drm_object_attach_property);
3921
c8e32cc1
DV		 3922/**
3923 * drm_object_property_set_value - set the value of a property
3924 * @obj: drm mode object to set property value for
3925 * @property: property to set
3926 * @val: value the property should be set to
3927 *
3928 * This functions sets a given property on a given object. This function only
3929 * changes the software state of the property, it does not call into the
3930 * driver's ->set_property callback.
3931 *
3932 * Returns:
3933 * Zero on success, error code on failure.
3934 */
c543188a
PZ		 3935int drm_object_property_set_value(struct drm_mode_object *obj,
3936 struct drm_property *property, uint64_t val)
3937{
3938 int i;
3939
7f88a9be 3940 for (i = 0; i < obj->properties->count; i++) {
b17cd757 3941 if (obj->properties->properties[i] == property) {
c543188a
PZ		 3942 obj->properties->values[i] = val;
3943 return 0;
3944 }
3945 }
3946
3947 return -EINVAL;
3948}
3949EXPORT_SYMBOL(drm_object_property_set_value);
3950
c8e32cc1
DV		 3951/**
3952 * drm_object_property_get_value - retrieve the value of a property
3953 * @obj: drm mode object to get property value from
3954 * @property: property to retrieve
3955 * @val: storage for the property value
3956 *
3957 * This function retrieves the softare state of the given property for the given
3958 * property. Since there is no driver callback to retrieve the current property
3959 * value this might be out of sync with the hardware, depending upon the driver
3960 * and property.
3961 *
3962 * Returns:
3963 * Zero on success, error code on failure.
3964 */
c543188a
PZ		 3965int drm_object_property_get_value(struct drm_mode_object *obj,
3966 struct drm_property *property, uint64_t *val)
3967{
3968 int i;
3969
88a48e29
RC		 3970 /* read-only properties bypass atomic mechanism and still store
3971 * their value in obj->properties->values[].. mostly to avoid
3972 * having to deal w/ EDID and similar props in atomic paths:
3973 */
3974 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
3975 !(property->flags & DRM_MODE_PROP_IMMUTABLE))
3976 return drm_atomic_get_property(obj, property, val);
3977
7f88a9be 3978 for (i = 0; i < obj->properties->count; i++) {
b17cd757 3979 if (obj->properties->properties[i] == property) {
c543188a
PZ		 3980 *val = obj->properties->values[i];
3981 return 0;
3982 }
3983 }
3984
3985 return -EINVAL;
3986}
3987EXPORT_SYMBOL(drm_object_property_get_value);
3988
c8e32cc1 3989/**
1a498633 3990 * drm_mode_getproperty_ioctl - get the property metadata
c8e32cc1
DV		 3991 * @dev: DRM device
3992 * @data: ioctl data
3993 * @file_priv: DRM file info
3994 *
1a498633
DV		 3995 * This function retrieves the metadata for a given property, like the different
3996 * possible values for an enum property or the limits for a range property.
3997 *
3998 * Blob properties are special
c8e32cc1
DV		 3999 *
4000 * Called by the user via ioctl.
4001 *
4002 * Returns:
1a498633 4003 * Zero on success, negative errno on failure.
c8e32cc1 4004 */
f453ba04
DA		 4005int drm_mode_getproperty_ioctl(struct drm_device *dev,
4006 void *data, struct drm_file *file_priv)
4007{
f453ba04
DA		 4008 struct drm_mode_get_property *out_resp = data;
4009 struct drm_property *property;
4010 int enum_count = 0;
f453ba04
DA		 4011 int value_count = 0;
4012 int ret = 0, i;
4013 int copied;
4014 struct drm_property_enum *prop_enum;
4015 struct drm_mode_property_enum __user *enum_ptr;
f453ba04 4016 uint64_t __user *values_ptr;
f453ba04 4017
fb3b06c8
DA		 4018 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4019 return -EINVAL;
4020
84849903 4021 drm_modeset_lock_all(dev);
a2b34e22
RC		 4022 property = drm_property_find(dev, out_resp->prop_id);
4023 if (!property) {
f27657f2 4024 ret = -ENOENT;
f453ba04
DA		 4025 goto done;
4026 }
f453ba04 4027
5ea22f24
RC		 4028 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4029 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
3758b341 4030 list_for_each_entry(prop_enum, &property->enum_list, head)
f453ba04 4031 enum_count++;
f453ba04
DA		 4032 }
4033
4034 value_count = property->num_values;
4035
4036 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
4037 out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
4038 out_resp->flags = property->flags;
4039
4040 if ((out_resp->count_values >= value_count) && value_count) {
81f6c7f8 4041 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
f453ba04
DA		 4042 for (i = 0; i < value_count; i++) {
4043 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
4044 ret = -EFAULT;
4045 goto done;
4046 }
4047 }
4048 }
4049 out_resp->count_values = value_count;
4050
5ea22f24
RC		 4051 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4052 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
f453ba04
DA		 4053 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
4054 copied = 0;
81f6c7f8 4055 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
3758b341 4056 list_for_each_entry(prop_enum, &property->enum_list, head) {
f453ba04
DA		 4057
4058 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
4059 ret = -EFAULT;
4060 goto done;
4061 }
4062
4063 if (copy_to_user(&enum_ptr[copied].name,
4064 &prop_enum->name, DRM_PROP_NAME_LEN)) {
4065 ret = -EFAULT;
4066 goto done;
4067 }
4068 copied++;
4069 }
4070 }
4071 out_resp->count_enum_blobs = enum_count;
4072 }
4073
3758b341
DV		 4074 /*
4075 * NOTE: The idea seems to have been to use this to read all the blob
4076 * property values. But nothing ever added them to the corresponding
4077 * list, userspace always used the special-purpose get_blob ioctl to
4078 * read the value for a blob property. It also doesn't make a lot of
4079 * sense to return values here when everything else is just metadata for
4080 * the property itself.
4081 */
4082 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4083 out_resp->count_enum_blobs = 0;
f453ba04 4084done:
84849903 4085 drm_modeset_unlock_all(dev);
f453ba04
DA		 4086 return ret;
4087}
4088
99531d9b
DS		 4089/**
4090 * drm_property_create_blob - Create new blob property
4091 *
4092 * Creates a new blob property for a specified DRM device, optionally
4093 * copying data.
4094 *
4095 * @dev: DRM device to create property for
4096 * @length: Length to allocate for blob data
4097 * @data: If specified, copies data into blob
10e8cb7e
DS		 4098 *
4099 * Returns:
4100 * New blob property with a single reference on success, or an ERR_PTR
4101 * value on failure.
99531d9b 4102 */
6bcacf51 4103struct drm_property_blob *
ecbbe59b 4104drm_property_create_blob(struct drm_device *dev, size_t length,
12e6cecd 4105 const void *data)
f453ba04
DA		 4106{
4107 struct drm_property_blob *blob;
6bfc56aa 4108 int ret;
f453ba04 4109
99531d9b 4110 if (!length)
10e8cb7e 4111 return ERR_PTR(-EINVAL);
f453ba04
DA		 4112
4113 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
4114 if (!blob)
10e8cb7e 4115 return ERR_PTR(-ENOMEM);
f453ba04 4116
e2f5d2ea
DS		 4117 /* This must be explicitly initialised, so we can safely call list_del
4118 * on it in the removal handler, even if it isn't in a file list. */
4119 INIT_LIST_HEAD(&blob->head_file);
8fb6e7a5 4120 blob->length = length;
6bcacf51 4121 blob->dev = dev;
8fb6e7a5 4122
99531d9b
DS		 4123 if (data)
4124 memcpy(blob->data, data, length);
8fb6e7a5
DS		 4125
4126 mutex_lock(&dev->mode_config.blob_lock);
4127
6bfc56aa
VS		 4128 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
4129 if (ret) {
4130 kfree(blob);
8fb6e7a5 4131 mutex_unlock(&dev->mode_config.blob_lock);
10e8cb7e 4132 return ERR_PTR(-EINVAL);
6bfc56aa
VS		 4133 }
4134
6bcacf51 4135 kref_init(&blob->refcount);
f453ba04 4136
e2f5d2ea
DS		 4137 list_add_tail(&blob->head_global,
4138 &dev->mode_config.property_blob_list);
f453ba04 4139
8fb6e7a5 4140 mutex_unlock(&dev->mode_config.blob_lock);
f453ba04 4141
f453ba04
DA		 4142 return blob;
4143}
6bcacf51 4144EXPORT_SYMBOL(drm_property_create_blob);
f453ba04 4145
6bcacf51
DS		 4146/**
4147 * drm_property_free_blob - Blob property destructor
4148 *
4149 * Internal free function for blob properties; must not be used directly.
4150 *
f102c16e 4151 * @kref: Reference
6bcacf51
DS		 4152 */
4153static void drm_property_free_blob(struct kref *kref)
f453ba04 4154{
6bcacf51
DS		 4155 struct drm_property_blob *blob =
4156 container_of(kref, struct drm_property_blob, refcount);
4157
4158 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock));
4159
e2f5d2ea
DS		 4160 list_del(&blob->head_global);
4161 list_del(&blob->head_file);
6bcacf51 4162 drm_mode_object_put(blob->dev, &blob->base);
8fb6e7a5 4163
f453ba04
DA		 4164 kfree(blob);
4165}
4166
6bcacf51
DS		 4167/**
4168 * drm_property_unreference_blob - Unreference a blob property
4169 *
4170 * Drop a reference on a blob property. May free the object.
4171 *
f102c16e 4172 * @blob: Pointer to blob property
6bcacf51
DS		 4173 */
4174void drm_property_unreference_blob(struct drm_property_blob *blob)
4175{
4176 struct drm_device *dev;
4177
4178 if (!blob)
4179 return;
4180
4181 dev = blob->dev;
4182
4183 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4184
4185 if (kref_put_mutex(&blob->refcount, drm_property_free_blob,
4186 &dev->mode_config.blob_lock))
4187 mutex_unlock(&dev->mode_config.blob_lock);
4188 else
4189 might_lock(&dev->mode_config.blob_lock);
6bcacf51
DS		 4190}
4191EXPORT_SYMBOL(drm_property_unreference_blob);
4192
4193/**
4194 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held
4195 *
4196 * Drop a reference on a blob property. May free the object. This must be
4197 * called with blob_lock held.
4198 *
f102c16e 4199 * @blob: Pointer to blob property
6bcacf51
DS		 4200 */
4201static void drm_property_unreference_blob_locked(struct drm_property_blob *blob)
4202{
4203 if (!blob)
4204 return;
4205
4206 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4207
4208 kref_put(&blob->refcount, drm_property_free_blob);
4209}
4210
e2f5d2ea
DS		 4211/**
4212 * drm_property_destroy_user_blobs - destroy all blobs created by this client
4213 * @dev: DRM device
4214 * @file_priv: destroy all blobs owned by this file handle
4215 */
4216void drm_property_destroy_user_blobs(struct drm_device *dev,
4217 struct drm_file *file_priv)
4218{
4219 struct drm_property_blob *blob, *bt;
4220
4221 mutex_lock(&dev->mode_config.blob_lock);
4222
4223 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) {
4224 list_del_init(&blob->head_file);
4225 drm_property_unreference_blob_locked(blob);
4226 }
4227
4228 mutex_unlock(&dev->mode_config.blob_lock);
4229}
4230
6bcacf51
DS		 4231/**
4232 * drm_property_reference_blob - Take a reference on an existing property
4233 *
4234 * Take a new reference on an existing blob property.
4235 *
f102c16e 4236 * @blob: Pointer to blob property
6bcacf51
DS		 4237 */
4238struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob)
4239{
4240 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4241 kref_get(&blob->refcount);
4242 return blob;
4243}
4244EXPORT_SYMBOL(drm_property_reference_blob);
4245
4246/*
4247 * Like drm_property_lookup_blob, but does not return an additional reference.
4248 * Must be called with blob_lock held.
4249 */
4250static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev,
4251 uint32_t id)
4252{
4253 struct drm_mode_object *obj = NULL;
4254 struct drm_property_blob *blob;
4255
4256 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock));
4257
4258 mutex_lock(&dev->mode_config.idr_mutex);
4259 obj = idr_find(&dev->mode_config.crtc_idr, id);
4260 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id))
4261 blob = NULL;
4262 else
4263 blob = obj_to_blob(obj);
4264 mutex_unlock(&dev->mode_config.idr_mutex);
4265
4266 return blob;
4267}
4268
4269/**
4270 * drm_property_lookup_blob - look up a blob property and take a reference
4271 * @dev: drm device
4272 * @id: id of the blob property
4273 *
4274 * If successful, this takes an additional reference to the blob property.
4275 * callers need to make sure to eventually unreference the returned property
4276 * again, using @drm_property_unreference_blob.
4277 */
4278struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev,
4279 uint32_t id)
4280{
4281 struct drm_property_blob *blob;
4282
4283 mutex_lock(&dev->mode_config.blob_lock);
4284 blob = __drm_property_lookup_blob(dev, id);
4285 if (blob) {
4286 if (!kref_get_unless_zero(&blob->refcount))
4287 blob = NULL;
4288 }
4289 mutex_unlock(&dev->mode_config.blob_lock);
4290
4291 return blob;
4292}
4293EXPORT_SYMBOL(drm_property_lookup_blob);
4294
d2ed3436
DS		 4295/**
4296 * drm_property_replace_global_blob - atomically replace existing blob property
4297 * @dev: drm device
4298 * @replace: location of blob property pointer to be replaced
4299 * @length: length of data for new blob, or 0 for no data
4300 * @data: content for new blob, or NULL for no data
4301 * @obj_holds_id: optional object for property holding blob ID
4302 * @prop_holds_id: optional property holding blob ID
4303 * @return 0 on success or error on failure
4304 *
4305 * This function will atomically replace a global property in the blob list,
4306 * optionally updating a property which holds the ID of that property. It is
4307 * guaranteed to be atomic: no caller will be allowed to see intermediate
4308 * results, and either the entire operation will succeed and clean up the
4309 * previous property, or it will fail and the state will be unchanged.
4310 *
4311 * If length is 0 or data is NULL, no new blob will be created, and the holding
4312 * property, if specified, will be set to 0.
4313 *
4314 * Access to the replace pointer is assumed to be protected by the caller, e.g.
4315 * by holding the relevant modesetting object lock for its parent.
4316 *
4317 * For example, a drm_connector has a 'PATH' property, which contains the ID
4318 * of a blob property with the value of the MST path information. Calling this
4319 * function with replace pointing to the connector's path_blob_ptr, length and
4320 * data set for the new path information, obj_holds_id set to the connector's
4321 * base object, and prop_holds_id set to the path property name, will perform
4322 * a completely atomic update. The access to path_blob_ptr is protected by the
4323 * caller holding a lock on the connector.
4324 */
4325static int drm_property_replace_global_blob(struct drm_device *dev,
4326 struct drm_property_blob **replace,
4327 size_t length,
4328 const void *data,
4329 struct drm_mode_object *obj_holds_id,
4330 struct drm_property *prop_holds_id)
4331{
4332 struct drm_property_blob *new_blob = NULL;
4333 struct drm_property_blob *old_blob = NULL;
4334 int ret;
4335
4336 WARN_ON(replace == NULL);
4337
4338 old_blob = *replace;
4339
4340 if (length && data) {
4341 new_blob = drm_property_create_blob(dev, length, data);
10e8cb7e
DS		 4342 if (IS_ERR(new_blob))
4343 return PTR_ERR(new_blob);
d2ed3436
DS		 4344 }
4345
4346 /* This does not need to be synchronised with blob_lock, as the
4347 * get_properties ioctl locks all modesetting objects, and
4348 * obj_holds_id must be locked before calling here, so we cannot
4349 * have its value out of sync with the list membership modified
4350 * below under blob_lock. */
4351 if (obj_holds_id) {
4352 ret = drm_object_property_set_value(obj_holds_id,
4353 prop_holds_id,
4354 new_blob ?
4355 new_blob->base.id : 0);
4356 if (ret != 0)
4357 goto err_created;
4358 }
4359
ec530829 4360 drm_property_unreference_blob(old_blob);
d2ed3436
DS		 4361 *replace = new_blob;
4362
4363 return 0;
4364
4365err_created:
6bcacf51 4366 drm_property_unreference_blob(new_blob);
d2ed3436
DS		 4367 return ret;
4368}
4369
c8e32cc1
DV		 4370/**
4371 * drm_mode_getblob_ioctl - get the contents of a blob property value
4372 * @dev: DRM device
4373 * @data: ioctl data
4374 * @file_priv: DRM file info
4375 *
4376 * This function retrieves the contents of a blob property. The value stored in
4377 * an object's blob property is just a normal modeset object id.
4378 *
4379 * Called by the user via ioctl.
4380 *
4381 * Returns:
1a498633 4382 * Zero on success, negative errno on failure.
c8e32cc1 4383 */
f453ba04
DA		 4384int drm_mode_getblob_ioctl(struct drm_device *dev,
4385 void *data, struct drm_file *file_priv)
4386{
f453ba04
DA		 4387 struct drm_mode_get_blob *out_resp = data;
4388 struct drm_property_blob *blob;
4389 int ret = 0;
81f6c7f8 4390 void __user *blob_ptr;
f453ba04 4391
fb3b06c8
DA		 4392 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4393 return -EINVAL;
4394
84849903 4395 drm_modeset_lock_all(dev);
8fb6e7a5 4396 mutex_lock(&dev->mode_config.blob_lock);
6bcacf51 4397 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
a2b34e22 4398 if (!blob) {
f27657f2 4399 ret = -ENOENT;
f453ba04
DA		 4400 goto done;
4401 }
f453ba04
DA		 4402
4403 if (out_resp->length == blob->length) {
81f6c7f8 4404 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4dfd909f 4405 if (copy_to_user(blob_ptr, blob->data, blob->length)) {
f453ba04
DA		 4406 ret = -EFAULT;
4407 goto done;
4408 }
4409 }
4410 out_resp->length = blob->length;
4411
4412done:
8fb6e7a5 4413 mutex_unlock(&dev->mode_config.blob_lock);
84849903 4414 drm_modeset_unlock_all(dev);
f453ba04
DA		 4415 return ret;
4416}
4417
e2f5d2ea
DS		 4418/**
4419 * drm_mode_createblob_ioctl - create a new blob property
4420 * @dev: DRM device
4421 * @data: ioctl data
4422 * @file_priv: DRM file info
4423 *
4424 * This function creates a new blob property with user-defined values. In order
4425 * to give us sensible validation and checking when creating, rather than at
4426 * every potential use, we also require a type to be provided upfront.
4427 *
4428 * Called by the user via ioctl.
4429 *
4430 * Returns:
4431 * Zero on success, negative errno on failure.
4432 */
4433int drm_mode_createblob_ioctl(struct drm_device *dev,
4434 void *data, struct drm_file *file_priv)
4435{
4436 struct drm_mode_create_blob *out_resp = data;
4437 struct drm_property_blob *blob;
4438 void __user *blob_ptr;
4439 int ret = 0;
4440
4441 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4442 return -EINVAL;
4443
4444 blob = drm_property_create_blob(dev, out_resp->length, NULL);
4445 if (IS_ERR(blob))
4446 return PTR_ERR(blob);
4447
4448 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4449 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) {
4450 ret = -EFAULT;
4451 goto out_blob;
4452 }
4453
4454 /* Dropping the lock between create_blob and our access here is safe
4455 * as only the same file_priv can remove the blob; at this point, it is
4456 * not associated with any file_priv. */
4457 mutex_lock(&dev->mode_config.blob_lock);
4458 out_resp->blob_id = blob->base.id;
4459 list_add_tail(&file_priv->blobs, &blob->head_file);
4460 mutex_unlock(&dev->mode_config.blob_lock);
4461
4462 return 0;
4463
4464out_blob:
4465 drm_property_unreference_blob(blob);
4466 return ret;
4467}
4468
4469/**
4470 * drm_mode_destroyblob_ioctl - destroy a user blob property
4471 * @dev: DRM device
4472 * @data: ioctl data
4473 * @file_priv: DRM file info
4474 *
4475 * Destroy an existing user-defined blob property.
4476 *
4477 * Called by the user via ioctl.
4478 *
4479 * Returns:
4480 * Zero on success, negative errno on failure.
4481 */
4482int drm_mode_destroyblob_ioctl(struct drm_device *dev,
4483 void *data, struct drm_file *file_priv)
4484{
4485 struct drm_mode_destroy_blob *out_resp = data;
4486 struct drm_property_blob *blob = NULL, *bt;
4487 bool found = false;
4488 int ret = 0;
4489
4490 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4491 return -EINVAL;
4492
4493 mutex_lock(&dev->mode_config.blob_lock);
4494 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4495 if (!blob) {
4496 ret = -ENOENT;
4497 goto err;
4498 }
4499
4500 /* Ensure the property was actually created by this user. */
4501 list_for_each_entry(bt, &file_priv->blobs, head_file) {
4502 if (bt == blob) {
4503 found = true;
4504 break;
4505 }
4506 }
4507
4508 if (!found) {
4509 ret = -EPERM;
4510 goto err;
4511 }
4512
4513 /* We must drop head_file here, because we may not be the last
4514 * reference on the blob. */
4515 list_del_init(&blob->head_file);
4516 drm_property_unreference_blob_locked(blob);
4517 mutex_unlock(&dev->mode_config.blob_lock);
4518
4519 return 0;
4520
4521err:
4522 mutex_unlock(&dev->mode_config.blob_lock);
4523 return ret;
4524}
4525
cc7096fb
DA		 4526/**
4527 * drm_mode_connector_set_path_property - set tile property on connector
4528 * @connector: connector to set property on.
d2ed3436 4529 * @path: path to use for property; must not be NULL.
cc7096fb
DA		 4530 *
4531 * This creates a property to expose to userspace to specify a
4532 * connector path. This is mainly used for DisplayPort MST where
4533 * connectors have a topology and we want to allow userspace to give
4534 * them more meaningful names.
4535 *
4536 * Returns:
1a498633 4537 * Zero on success, negative errno on failure.
cc7096fb 4538 */
43aba7eb 4539int drm_mode_connector_set_path_property(struct drm_connector *connector,
12e6cecd 4540 const char *path)
43aba7eb
DA		 4541{
4542 struct drm_device *dev = connector->dev;
ecbbe59b 4543 int ret;
43aba7eb 4544
d2ed3436
DS		 4545 ret = drm_property_replace_global_blob(dev,
4546 &connector->path_blob_ptr,
4547 strlen(path) + 1,
4548 path,
4549 &connector->base,
4550 dev->mode_config.path_property);
43aba7eb
DA		 4551 return ret;
4552}
4553EXPORT_SYMBOL(drm_mode_connector_set_path_property);
4554
6f134d7b
DA		 4555/**
4556 * drm_mode_connector_set_tile_property - set tile property on connector
4557 * @connector: connector to set property on.
4558 *
4559 * This looks up the tile information for a connector, and creates a
4560 * property for userspace to parse if it exists. The property is of
4561 * the form of 8 integers using ':' as a separator.
4562 *
4563 * Returns:
4564 * Zero on success, errno on failure.
4565 */
4566int drm_mode_connector_set_tile_property(struct drm_connector *connector)
4567{
4568 struct drm_device *dev = connector->dev;
6f134d7b 4569 char tile[256];
d2ed3436 4570 int ret;
6f134d7b
DA		 4571
4572 if (!connector->has_tile) {
d2ed3436
DS		 4573 ret = drm_property_replace_global_blob(dev,
4574 &connector->tile_blob_ptr,
4575 0,
4576 NULL,
4577 &connector->base,
4578 dev->mode_config.tile_property);
6f134d7b
DA		 4579 return ret;
4580 }
4581
4582 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
4583 connector->tile_group->id, connector->tile_is_single_monitor,
4584 connector->num_h_tile, connector->num_v_tile,
4585 connector->tile_h_loc, connector->tile_v_loc,
4586 connector->tile_h_size, connector->tile_v_size);
6f134d7b 4587
d2ed3436
DS		 4588 ret = drm_property_replace_global_blob(dev,
4589 &connector->tile_blob_ptr,
4590 strlen(tile) + 1,
4591 tile,
4592 &connector->base,
4593 dev->mode_config.tile_property);
6f134d7b
DA		 4594 return ret;
4595}
4596EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
4597
c8e32cc1
DV		 4598/**
4599 * drm_mode_connector_update_edid_property - update the edid property of a connector
4600 * @connector: drm connector
4601 * @edid: new value of the edid property
4602 *
4603 * This function creates a new blob modeset object and assigns its id to the
4604 * connector's edid property.
4605 *
4606 * Returns:
1a498633 4607 * Zero on success, negative errno on failure.
c8e32cc1 4608 */
f453ba04 4609int drm_mode_connector_update_edid_property(struct drm_connector *connector,
12e6cecd 4610 const struct edid *edid)
f453ba04
DA		 4611{
4612 struct drm_device *dev = connector->dev;
d2ed3436 4613 size_t size = 0;
ecbbe59b 4614 int ret;
f453ba04 4615
4cf2b281
TW		 4616 /* ignore requests to set edid when overridden */
4617 if (connector->override_edid)
4618 return 0;
4619
d2ed3436 4620 if (edid)
e24ff467 4621 size = EDID_LENGTH * (1 + edid->extensions);
f453ba04 4622
d2ed3436
DS		 4623 ret = drm_property_replace_global_blob(dev,
4624 &connector->edid_blob_ptr,
4625 size,
4626 edid,
4627 &connector->base,
4628 dev->mode_config.edid_property);
f453ba04
DA		 4629 return ret;
4630}
4631EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
4632
3843e71f
RC		 4633/* Some properties could refer to dynamic refcnt'd objects, or things that
4634 * need special locking to handle lifetime issues (ie. to ensure the prop
4635 * value doesn't become invalid part way through the property update due to
4636 * race). The value returned by reference via 'obj' should be passed back
4637 * to drm_property_change_valid_put() after the property is set (and the
4638 * object to which the property is attached has a chance to take it's own
4639 * reference).
4640 */
d34f20d6 4641bool drm_property_change_valid_get(struct drm_property *property,
3843e71f 4642 uint64_t value, struct drm_mode_object **ref)
26a34815 4643{
2ca651d1
TR		 4644 int i;
4645
26a34815
PZ		 4646 if (property->flags & DRM_MODE_PROP_IMMUTABLE)
4647 return false;
5ea22f24 4648
3843e71f
RC		 4649 *ref = NULL;
4650
5ea22f24 4651 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
26a34815
PZ		 4652 if (value < property->values[0] || value > property->values[1])
4653 return false;
4654 return true;
ebc44cf3
RC		 4655 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) {
4656 int64_t svalue = U642I64(value);
4dfd909f 4657
ebc44cf3
RC		 4658 if (svalue < U642I64(property->values[0]) ||
4659 svalue > U642I64(property->values[1]))
4660 return false;
4661 return true;
5ea22f24 4662 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
592c20ee 4663 uint64_t valid_mask = 0;
4dfd909f 4664
49e27545
RC		 4665 for (i = 0; i < property->num_values; i++)
4666 valid_mask |= (1ULL << property->values[i]);
4667 return !(value & ~valid_mask);
5ea22f24 4668 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
6bcacf51
DS		 4669 struct drm_property_blob *blob;
4670
4671 if (value == 0)
4672 return true;
4673
4674 blob = drm_property_lookup_blob(property->dev, value);
4675 if (blob) {
4676 *ref = &blob->base;
4677 return true;
4678 } else {
4679 return false;
4680 }
98f75de4 4681 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
98f75de4
RC		 4682 /* a zero value for an object property translates to null: */
4683 if (value == 0)
4684 return true;
3843e71f
RC		 4685
4686 /* handle refcnt'd objects specially: */
4687 if (property->values[0] == DRM_MODE_OBJECT_FB) {
4688 struct drm_framebuffer *fb;
4689 fb = drm_framebuffer_lookup(property->dev, value);
4690 if (fb) {
4691 *ref = &fb->base;
4692 return true;
4693 } else {
4694 return false;
4695 }
4696 } else {
4697 return _object_find(property->dev, value, property->values[0]) != NULL;
4698 }
26a34815 4699 }
2ca651d1
TR		 4700
4701 for (i = 0; i < property->num_values; i++)
4702 if (property->values[i] == value)
4703 return true;
4704 return false;
26a34815
PZ		 4705}
4706
d34f20d6 4707void drm_property_change_valid_put(struct drm_property *property,
3843e71f
RC		 4708 struct drm_mode_object *ref)
4709{
4710 if (!ref)
4711 return;
4712
4713 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4714 if (property->values[0] == DRM_MODE_OBJECT_FB)
4715 drm_framebuffer_unreference(obj_to_fb(ref));
da9b2a38
DS		 4716 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4717 drm_property_unreference_blob(obj_to_blob(ref));
3843e71f
RC		 4718}
4719
c8e32cc1
DV		 4720/**
4721 * drm_mode_connector_property_set_ioctl - set the current value of a connector property
4722 * @dev: DRM device
4723 * @data: ioctl data
4724 * @file_priv: DRM file info
4725 *
4726 * This function sets the current value for a connectors's property. It also
4727 * calls into a driver's ->set_property callback to update the hardware state
4728 *
4729 * Called by the user via ioctl.
4730 *
4731 * Returns:
1a498633 4732 * Zero on success, negative errno on failure.
c8e32cc1 4733 */
f453ba04
DA		 4734int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
4735 void *data, struct drm_file *file_priv)
4736{
0057d8dd
PZ		 4737 struct drm_mode_connector_set_property *conn_set_prop = data;
4738 struct drm_mode_obj_set_property obj_set_prop = {
4739 .value = conn_set_prop->value,
4740 .prop_id = conn_set_prop->prop_id,
4741 .obj_id = conn_set_prop->connector_id,
4742 .obj_type = DRM_MODE_OBJECT_CONNECTOR
4743 };
fb3b06c8 4744
0057d8dd
PZ		 4745 /* It does all the locking and checking we need */
4746 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
f453ba04
DA		 4747}
4748
c543188a
PZ		 4749static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
4750 struct drm_property *property,
4751 uint64_t value)
4752{
4753 int ret = -EINVAL;
4754 struct drm_connector *connector = obj_to_connector(obj);
4755
4756 /* Do DPMS ourselves */
4757 if (property == connector->dev->mode_config.dpms_property) {
c543188a 4758 ret = 0;
9a69a9ac
ML		 4759 if (connector->funcs->dpms)
4760 ret = (*connector->funcs->dpms)(connector, (int)value);
c543188a
PZ		 4761 } else if (connector->funcs->set_property)
4762 ret = connector->funcs->set_property(connector, property, value);
4763
4764 /* store the property value if successful */
4765 if (!ret)
58495563 4766 drm_object_property_set_value(&connector->base, property, value);
c543188a
PZ		 4767 return ret;
4768}
4769
bffd9de0
PZ		 4770static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
4771 struct drm_property *property,
4772 uint64_t value)
4773{
4774 int ret = -EINVAL;
4775 struct drm_crtc *crtc = obj_to_crtc(obj);
4776
4777 if (crtc->funcs->set_property)
4778 ret = crtc->funcs->set_property(crtc, property, value);
4779 if (!ret)
4780 drm_object_property_set_value(obj, property, value);
4781
4782 return ret;
4783}
4784
3a5f87c2
TW		 4785/**
4786 * drm_mode_plane_set_obj_prop - set the value of a property
4787 * @plane: drm plane object to set property value for
4788 * @property: property to set
4789 * @value: value the property should be set to
4790 *
4791 * This functions sets a given property on a given plane object. This function
4792 * calls the driver's ->set_property callback and changes the software state of
4793 * the property if the callback succeeds.
4794 *
4795 * Returns:
4796 * Zero on success, error code on failure.
4797 */
4798int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
4799 struct drm_property *property,
4800 uint64_t value)
4d93914a
RC		 4801{
4802 int ret = -EINVAL;
3a5f87c2 4803 struct drm_mode_object *obj = &plane->base;
4d93914a
RC		 4804
4805 if (plane->funcs->set_property)
4806 ret = plane->funcs->set_property(plane, property, value);
4807 if (!ret)
4808 drm_object_property_set_value(obj, property, value);
4809
4810 return ret;
4811}
3a5f87c2 4812EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
4d93914a 4813
c8e32cc1 4814/**
1a498633 4815 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
c8e32cc1
DV		 4816 * @dev: DRM device
4817 * @data: ioctl data
4818 * @file_priv: DRM file info
4819 *
4820 * This function retrieves the current value for an object's property. Compared
4821 * to the connector specific ioctl this one is extended to also work on crtc and
4822 * plane objects.
4823 *
4824 * Called by the user via ioctl.
4825 *
4826 * Returns:
1a498633 4827 * Zero on success, negative errno on failure.
c8e32cc1 4828 */
c543188a
PZ		 4829int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
4830 struct drm_file *file_priv)
4831{
4832 struct drm_mode_obj_get_properties *arg = data;
4833 struct drm_mode_object *obj;
4834 int ret = 0;
c543188a
PZ		 4835
4836 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4837 return -EINVAL;
4838
84849903 4839 drm_modeset_lock_all(dev);
c543188a
PZ		 4840
4841 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
4842 if (!obj) {
f27657f2 4843 ret = -ENOENT;
c543188a
PZ		 4844 goto out;
4845 }
4846 if (!obj->properties) {
4847 ret = -EINVAL;
4848 goto out;
4849 }
4850
88a48e29 4851 ret = get_properties(obj, file_priv->atomic,
95cbf110
RC		 4852 (uint32_t __user *)(unsigned long)(arg->props_ptr),
4853 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
4854 &arg->count_props);
c543188a 4855
c543188a 4856out:
84849903 4857 drm_modeset_unlock_all(dev);
c543188a
PZ		 4858 return ret;
4859}
4860
c8e32cc1
DV		 4861/**
4862 * drm_mode_obj_set_property_ioctl - set the current value of an object's property
4863 * @dev: DRM device
4864 * @data: ioctl data
4865 * @file_priv: DRM file info
4866 *
4867 * This function sets the current value for an object's property. It also calls
4868 * into a driver's ->set_property callback to update the hardware state.
4869 * Compared to the connector specific ioctl this one is extended to also work on
4870 * crtc and plane objects.
4871 *
4872 * Called by the user via ioctl.
4873 *
4874 * Returns:
1a498633 4875 * Zero on success, negative errno on failure.
c8e32cc1 4876 */
c543188a
PZ		 4877int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
4878 struct drm_file *file_priv)
4879{
4880 struct drm_mode_obj_set_property *arg = data;
4881 struct drm_mode_object *arg_obj;
4882 struct drm_mode_object *prop_obj;
4883 struct drm_property *property;
3843e71f
RC		 4884 int i, ret = -EINVAL;
4885 struct drm_mode_object *ref;
c543188a
PZ		 4886
4887 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4888 return -EINVAL;
4889
84849903 4890 drm_modeset_lock_all(dev);
c543188a
PZ		 4891
4892 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
f27657f2
VS		 4893 if (!arg_obj) {
4894 ret = -ENOENT;
c543188a 4895 goto out;
f27657f2 4896 }
c543188a
PZ		 4897 if (!arg_obj->properties)
4898 goto out;
4899
7f88a9be 4900 for (i = 0; i < arg_obj->properties->count; i++)
b17cd757 4901 if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
c543188a
PZ		 4902 break;
4903
7f88a9be 4904 if (i == arg_obj->properties->count)
c543188a
PZ		 4905 goto out;
4906
4907 prop_obj = drm_mode_object_find(dev, arg->prop_id,
4908 DRM_MODE_OBJECT_PROPERTY);
f27657f2
VS		 4909 if (!prop_obj) {
4910 ret = -ENOENT;
c543188a 4911 goto out;
f27657f2 4912 }
c543188a
PZ		 4913 property = obj_to_property(prop_obj);
4914
3843e71f 4915 if (!drm_property_change_valid_get(property, arg->value, &ref))
c543188a
PZ		 4916 goto out;
4917
4918 switch (arg_obj->type) {
4919 case DRM_MODE_OBJECT_CONNECTOR:
4920 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
4921 arg->value);
4922 break;
bffd9de0
PZ		 4923 case DRM_MODE_OBJECT_CRTC:
4924 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
4925 break;
4d93914a 4926 case DRM_MODE_OBJECT_PLANE:
3a5f87c2
TW		 4927 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
4928 property, arg->value);
4d93914a 4929 break;
c543188a
PZ		 4930 }
4931
3843e71f
RC		 4932 drm_property_change_valid_put(property, ref);
4933
c543188a 4934out:
84849903 4935 drm_modeset_unlock_all(dev);
c543188a
PZ		 4936 return ret;
4937}
4938
c8e32cc1
DV		 4939/**
4940 * drm_mode_connector_attach_encoder - attach a connector to an encoder
4941 * @connector: connector to attach
4942 * @encoder: encoder to attach @connector to
4943 *
4944 * This function links up a connector to an encoder. Note that the routing
4945 * restrictions between encoders and crtcs are exposed to userspace through the
4946 * possible_clones and possible_crtcs bitmasks.
4947 *
4948 * Returns:
1a498633 4949 * Zero on success, negative errno on failure.
c8e32cc1 4950 */
f453ba04
DA		 4951int drm_mode_connector_attach_encoder(struct drm_connector *connector,
4952 struct drm_encoder *encoder)
4953{
4954 int i;
4955
4956 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
4957 if (connector->encoder_ids[i] == 0) {
4958 connector->encoder_ids[i] = encoder->base.id;
4959 return 0;
4960 }
4961 }
4962 return -ENOMEM;
4963}
4964EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
4965
c8e32cc1
DV		 4966/**
4967 * drm_mode_crtc_set_gamma_size - set the gamma table size
4968 * @crtc: CRTC to set the gamma table size for
4969 * @gamma_size: size of the gamma table
4970 *
4971 * Drivers which support gamma tables should set this to the supported gamma
4972 * table size when initializing the CRTC. Currently the drm core only supports a
4973 * fixed gamma table size.
4974 *
4975 * Returns:
1a498633 4976 * Zero on success, negative errno on failure.
c8e32cc1 4977 */
4cae5b84 4978int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
c8e32cc1 4979 int gamma_size)
f453ba04
DA		 4980{
4981 crtc->gamma_size = gamma_size;
4982
bd3f0ff9
TR		 4983 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3,
4984 GFP_KERNEL);
f453ba04
DA		 4985 if (!crtc->gamma_store) {
4986 crtc->gamma_size = 0;
4cae5b84 4987 return -ENOMEM;
f453ba04
DA		 4988 }
4989
4cae5b84 4990 return 0;
f453ba04
DA		 4991}
4992EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
4993
c8e32cc1
DV		 4994/**
4995 * drm_mode_gamma_set_ioctl - set the gamma table
4996 * @dev: DRM device
4997 * @data: ioctl data
4998 * @file_priv: DRM file info
4999 *
5000 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
5001 * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
5002 *
5003 * Called by the user via ioctl.
5004 *
5005 * Returns:
1a498633 5006 * Zero on success, negative errno on failure.
c8e32cc1 5007 */
f453ba04
DA		 5008int drm_mode_gamma_set_ioctl(struct drm_device *dev,
5009 void *data, struct drm_file *file_priv)
5010{
5011 struct drm_mode_crtc_lut *crtc_lut = data;
f453ba04
DA		 5012 struct drm_crtc *crtc;
5013 void *r_base, *g_base, *b_base;
5014 int size;
5015 int ret = 0;
5016
fb3b06c8
DA		 5017 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5018 return -EINVAL;
5019
84849903 5020 drm_modeset_lock_all(dev);
a2b34e22
RC		 5021 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5022 if (!crtc) {
f27657f2 5023 ret = -ENOENT;
f453ba04
DA		 5024 goto out;
5025 }
f453ba04 5026
ebe0f244
LP		 5027 if (crtc->funcs->gamma_set == NULL) {
5028 ret = -ENOSYS;
5029 goto out;
5030 }
5031
f453ba04
DA		 5032 /* memcpy into gamma store */
5033 if (crtc_lut->gamma_size != crtc->gamma_size) {
5034 ret = -EINVAL;
5035 goto out;
5036 }
5037
5038 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5039 r_base = crtc->gamma_store;
5040 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
5041 ret = -EFAULT;
5042 goto out;
5043 }
5044
5045 g_base = r_base + size;
5046 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
5047 ret = -EFAULT;
5048 goto out;
5049 }
5050
5051 b_base = g_base + size;
5052 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
5053 ret = -EFAULT;
5054 goto out;
5055 }
5056
7203425a 5057 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
f453ba04
DA		 5058
5059out:
84849903 5060 drm_modeset_unlock_all(dev);
f453ba04
DA		 5061 return ret;
5062
5063}
5064
c8e32cc1
DV		 5065/**
5066 * drm_mode_gamma_get_ioctl - get the gamma table
5067 * @dev: DRM device
5068 * @data: ioctl data
5069 * @file_priv: DRM file info
5070 *
5071 * Copy the current gamma table into the storage provided. This also provides
5072 * the gamma table size the driver expects, which can be used to size the
5073 * allocated storage.
5074 *
5075 * Called by the user via ioctl.
5076 *
5077 * Returns:
1a498633 5078 * Zero on success, negative errno on failure.
c8e32cc1 5079 */
f453ba04
DA		 5080int drm_mode_gamma_get_ioctl(struct drm_device *dev,
5081 void *data, struct drm_file *file_priv)
5082{
5083 struct drm_mode_crtc_lut *crtc_lut = data;
f453ba04
DA		 5084 struct drm_crtc *crtc;
5085 void *r_base, *g_base, *b_base;
5086 int size;
5087 int ret = 0;
5088
fb3b06c8
DA		 5089 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5090 return -EINVAL;
5091
84849903 5092 drm_modeset_lock_all(dev);
a2b34e22
RC		 5093 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5094 if (!crtc) {
f27657f2 5095 ret = -ENOENT;
f453ba04
DA		 5096 goto out;
5097 }
f453ba04
DA		 5098
5099 /* memcpy into gamma store */
5100 if (crtc_lut->gamma_size != crtc->gamma_size) {
5101 ret = -EINVAL;
5102 goto out;
5103 }
5104
5105 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5106 r_base = crtc->gamma_store;
5107 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
5108 ret = -EFAULT;
5109 goto out;
5110 }
5111
5112 g_base = r_base + size;
5113 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
5114 ret = -EFAULT;
5115 goto out;
5116 }
5117
5118 b_base = g_base + size;
5119 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
5120 ret = -EFAULT;
5121 goto out;
5122 }
5123out:
84849903 5124 drm_modeset_unlock_all(dev);
f453ba04
DA		 5125 return ret;
5126}
d91d8a3f 5127
c8e32cc1
DV		 5128/**
5129 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
5130 * @dev: DRM device
5131 * @data: ioctl data
5132 * @file_priv: DRM file info
5133 *
5134 * This schedules an asynchronous update on a given CRTC, called page flip.
5135 * Optionally a drm event is generated to signal the completion of the event.
5136 * Generic drivers cannot assume that a pageflip with changed framebuffer
5137 * properties (including driver specific metadata like tiling layout) will work,
5138 * but some drivers support e.g. pixel format changes through the pageflip
5139 * ioctl.
5140 *
5141 * Called by the user via ioctl.
5142 *
5143 * Returns:
1a498633 5144 * Zero on success, negative errno on failure.
c8e32cc1 5145 */
d91d8a3f
KH		 5146int drm_mode_page_flip_ioctl(struct drm_device *dev,
5147 void *data, struct drm_file *file_priv)
5148{
5149 struct drm_mode_crtc_page_flip *page_flip = data;
d91d8a3f 5150 struct drm_crtc *crtc;
3d30a59b 5151 struct drm_framebuffer *fb = NULL;
d91d8a3f
KH		 5152 struct drm_pending_vblank_event *e = NULL;
5153 unsigned long flags;
5154 int ret = -EINVAL;
5155
5156 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
5157 page_flip->reserved != 0)
5158 return -EINVAL;
5159
62f2104f
KP		 5160 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
5161 return -EINVAL;
5162
a2b34e22
RC		 5163 crtc = drm_crtc_find(dev, page_flip->crtc_id);
5164 if (!crtc)
f27657f2 5165 return -ENOENT;
d91d8a3f 5166
4d02e2de 5167 drm_modeset_lock_crtc(crtc, crtc->primary);
f4510a27 5168 if (crtc->primary->fb == NULL) {
90c1efdd
CW		 5169 /* The framebuffer is currently unbound, presumably
5170 * due to a hotplug event, that userspace has not
5171 * yet discovered.
5172 */
5173 ret = -EBUSY;
5174 goto out;
5175 }
5176
d91d8a3f
KH		 5177 if (crtc->funcs->page_flip == NULL)
5178 goto out;
5179
786b99ed 5180 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
37c4e705
VS		 5181 if (!fb) {
5182 ret = -ENOENT;
d91d8a3f 5183 goto out;
37c4e705 5184 }
d91d8a3f 5185
c11e9283
DL		 5186 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
5187 if (ret)
5f61bb42 5188 goto out;
5f61bb42 5189
f4510a27 5190 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
909d9cda
LP		 5191 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
5192 ret = -EINVAL;
5193 goto out;
5194 }
5195
d91d8a3f
KH		 5196 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5197 ret = -ENOMEM;
5198 spin_lock_irqsave(&dev->event_lock, flags);
f76511b9 5199 if (file_priv->event_space < sizeof(e->event)) {
d91d8a3f
KH		 5200 spin_unlock_irqrestore(&dev->event_lock, flags);
5201 goto out;
5202 }
f76511b9 5203 file_priv->event_space -= sizeof(e->event);
d91d8a3f
KH		 5204 spin_unlock_irqrestore(&dev->event_lock, flags);
5205
f76511b9 5206 e = kzalloc(sizeof(*e), GFP_KERNEL);
d91d8a3f
KH		 5207 if (e == NULL) {
5208 spin_lock_irqsave(&dev->event_lock, flags);
f76511b9 5209 file_priv->event_space += sizeof(e->event);
d91d8a3f
KH		 5210 spin_unlock_irqrestore(&dev->event_lock, flags);
5211 goto out;
5212 }
5213
7bd4d7be 5214 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
f76511b9 5215 e->event.base.length = sizeof(e->event);
d91d8a3f
KH		 5216 e->event.user_data = page_flip->user_data;
5217 e->base.event = &e->event.base;
5218 e->base.file_priv = file_priv;
5219 e->base.destroy =
5220 (void (*) (struct drm_pending_event *)) kfree;
5221 }
5222
3d30a59b 5223 crtc->primary->old_fb = crtc->primary->fb;
ed8d1975 5224 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
d91d8a3f 5225 if (ret) {
aef6a7ee
JS		 5226 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5227 spin_lock_irqsave(&dev->event_lock, flags);
f76511b9 5228 file_priv->event_space += sizeof(e->event);
aef6a7ee
JS		 5229 spin_unlock_irqrestore(&dev->event_lock, flags);
5230 kfree(e);
5231 }
b0d12325 5232 /* Keep the old fb, don't unref it. */
3d30a59b 5233 crtc->primary->old_fb = NULL;
b0d12325 5234 } else {
3cb43cc0 5235 crtc->primary->fb = fb;
b0d12325
DV		 5236 /* Unref only the old framebuffer. */
5237 fb = NULL;
d91d8a3f
KH		 5238 }
5239
5240out:
b0d12325
DV		 5241 if (fb)
5242 drm_framebuffer_unreference(fb);
3d30a59b
DV		 5243 if (crtc->primary->old_fb)
5244 drm_framebuffer_unreference(crtc->primary->old_fb);
5245 crtc->primary->old_fb = NULL;
d059f652 5246 drm_modeset_unlock_crtc(crtc);
b4d5e7d1 5247
d91d8a3f
KH		 5248 return ret;
5249}
eb033556 5250
c8e32cc1
DV		 5251/**
5252 * drm_mode_config_reset - call ->reset callbacks
5253 * @dev: drm device
5254 *
5255 * This functions calls all the crtc's, encoder's and connector's ->reset
5256 * callback. Drivers can use this in e.g. their driver load or resume code to
5257 * reset hardware and software state.
5258 */
eb033556
CW		 5259void drm_mode_config_reset(struct drm_device *dev)
5260{
5261 struct drm_crtc *crtc;
2a0d7cfd 5262 struct drm_plane *plane;
eb033556
CW		 5263 struct drm_encoder *encoder;
5264 struct drm_connector *connector;
5265
e4f62546 5266 drm_for_each_plane(plane, dev)
2a0d7cfd
DV		 5267 if (plane->funcs->reset)
5268 plane->funcs->reset(plane);
5269
e4f62546 5270 drm_for_each_crtc(crtc, dev)
eb033556
CW		 5271 if (crtc->funcs->reset)
5272 crtc->funcs->reset(crtc);
5273
e4f62546 5274 drm_for_each_encoder(encoder, dev)
eb033556
CW		 5275 if (encoder->funcs->reset)
5276 encoder->funcs->reset(encoder);
5277
f8c2ba31 5278 mutex_lock(&dev->mode_config.mutex);
4eebf60b 5279 drm_for_each_connector(connector, dev)
eb033556
CW		 5280 if (connector->funcs->reset)
5281 connector->funcs->reset(connector);
f8c2ba31 5282 mutex_unlock(&dev->mode_config.mutex);
eb033556
CW		 5283}
5284EXPORT_SYMBOL(drm_mode_config_reset);
ff72145b 5285
c8e32cc1
DV		 5286/**
5287 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
5288 * @dev: DRM device
5289 * @data: ioctl data
5290 * @file_priv: DRM file info
5291 *
5292 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
5293 * TTM or something else entirely) and returns the resulting buffer handle. This
5294 * handle can then be wrapped up into a framebuffer modeset object.
5295 *
5296 * Note that userspace is not allowed to use such objects for render
5297 * acceleration - drivers must create their own private ioctls for such a use
5298 * case.
5299 *
5300 * Called by the user via ioctl.
5301 *
5302 * Returns:
1a498633 5303 * Zero on success, negative errno on failure.
c8e32cc1 5304 */
ff72145b
DA		 5305int drm_mode_create_dumb_ioctl(struct drm_device *dev,
5306 void *data, struct drm_file *file_priv)
5307{
5308 struct drm_mode_create_dumb *args = data;
b28cd41f 5309 u32 cpp, stride, size;
ff72145b
DA		 5310
5311 if (!dev->driver->dumb_create)
5312 return -ENOSYS;
b28cd41f
DH		 5313 if (!args->width || !args->height || !args->bpp)
5314 return -EINVAL;
5315
5316 /* overflow checks for 32bit size calculations */
00e72089 5317 /* NOTE: DIV_ROUND_UP() can overflow */
b28cd41f 5318 cpp = DIV_ROUND_UP(args->bpp, 8);
00e72089 5319 if (!cpp || cpp > 0xffffffffU / args->width)
b28cd41f
DH		 5320 return -EINVAL;
5321 stride = cpp * args->width;
5322 if (args->height > 0xffffffffU / stride)
5323 return -EINVAL;
5324
5325 /* test for wrap-around */
5326 size = args->height * stride;
5327 if (PAGE_ALIGN(size) == 0)
5328 return -EINVAL;
5329
f6085952
TR		 5330 /*
5331 * handle, pitch and size are output parameters. Zero them out to
5332 * prevent drivers from accidentally using uninitialized data. Since
5333 * not all existing userspace is clearing these fields properly we
5334 * cannot reject IOCTL with garbage in them.
5335 */
5336 args->handle = 0;
5337 args->pitch = 0;
5338 args->size = 0;
5339
ff72145b
DA		 5340 return dev->driver->dumb_create(file_priv, dev, args);
5341}
5342
c8e32cc1
DV		 5343/**
5344 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
5345 * @dev: DRM device
5346 * @data: ioctl data
5347 * @file_priv: DRM file info
5348 *
5349 * Allocate an offset in the drm device node's address space to be able to
5350 * memory map a dumb buffer.
5351 *
5352 * Called by the user via ioctl.
5353 *
5354 * Returns:
1a498633 5355 * Zero on success, negative errno on failure.
c8e32cc1 5356 */
ff72145b
DA		 5357int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
5358 void *data, struct drm_file *file_priv)
5359{
5360 struct drm_mode_map_dumb *args = data;
5361
5362 /* call driver ioctl to get mmap offset */
5363 if (!dev->driver->dumb_map_offset)
5364 return -ENOSYS;
5365
5366 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
5367}
5368
c8e32cc1
DV		 5369/**
5370 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
5371 * @dev: DRM device
5372 * @data: ioctl data
5373 * @file_priv: DRM file info
5374 *
5375 * This destroys the userspace handle for the given dumb backing storage buffer.
5376 * Since buffer objects must be reference counted in the kernel a buffer object
5377 * won't be immediately freed if a framebuffer modeset object still uses it.
5378 *
5379 * Called by the user via ioctl.
5380 *
5381 * Returns:
1a498633 5382 * Zero on success, negative errno on failure.
c8e32cc1 5383 */
ff72145b
DA		 5384int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
5385 void *data, struct drm_file *file_priv)
5386{
5387 struct drm_mode_destroy_dumb *args = data;
5388
5389 if (!dev->driver->dumb_destroy)
5390 return -ENOSYS;
5391
5392 return dev->driver->dumb_destroy(file_priv, dev, args->handle);
5393}
248dbc23 5394
c8e32cc1
DV		 5395/**
5396 * drm_fb_get_bpp_depth - get the bpp/depth values for format
5397 * @format: pixel format (DRM_FORMAT_*)
5398 * @depth: storage for the depth value
5399 * @bpp: storage for the bpp value
5400 *
5401 * This only supports RGB formats here for compat with code that doesn't use
5402 * pixel formats directly yet.
248dbc23
DA		 5403 */
5404void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
5405 int *bpp)
5406{
5407 switch (format) {
c51a6bc5 5408 case DRM_FORMAT_C8:
04b3924d
VS		 5409 case DRM_FORMAT_RGB332:
5410 case DRM_FORMAT_BGR233:
248dbc23
DA		 5411 *depth = 8;
5412 *bpp = 8;
5413 break;
04b3924d
VS		 5414 case DRM_FORMAT_XRGB1555:
5415 case DRM_FORMAT_XBGR1555:
5416 case DRM_FORMAT_RGBX5551:
5417 case DRM_FORMAT_BGRX5551:
5418 case DRM_FORMAT_ARGB1555:
5419 case DRM_FORMAT_ABGR1555:
5420 case DRM_FORMAT_RGBA5551:
5421 case DRM_FORMAT_BGRA5551:
248dbc23
DA		 5422 *depth = 15;
5423 *bpp = 16;
5424 break;
04b3924d
VS		 5425 case DRM_FORMAT_RGB565:
5426 case DRM_FORMAT_BGR565:
248dbc23
DA		 5427 *depth = 16;
5428 *bpp = 16;
5429 break;
04b3924d
VS		 5430 case DRM_FORMAT_RGB888:
5431 case DRM_FORMAT_BGR888:
5432 *depth = 24;
5433 *bpp = 24;
5434 break;
5435 case DRM_FORMAT_XRGB8888:
5436 case DRM_FORMAT_XBGR8888:
5437 case DRM_FORMAT_RGBX8888:
5438 case DRM_FORMAT_BGRX8888:
248dbc23
DA		 5439 *depth = 24;
5440 *bpp = 32;
5441 break;
04b3924d
VS		 5442 case DRM_FORMAT_XRGB2101010:
5443 case DRM_FORMAT_XBGR2101010:
5444 case DRM_FORMAT_RGBX1010102:
5445 case DRM_FORMAT_BGRX1010102:
5446 case DRM_FORMAT_ARGB2101010:
5447 case DRM_FORMAT_ABGR2101010:
5448 case DRM_FORMAT_RGBA1010102:
5449 case DRM_FORMAT_BGRA1010102:
248dbc23
DA		 5450 *depth = 30;
5451 *bpp = 32;
5452 break;
04b3924d
VS		 5453 case DRM_FORMAT_ARGB8888:
5454 case DRM_FORMAT_ABGR8888:
5455 case DRM_FORMAT_RGBA8888:
5456 case DRM_FORMAT_BGRA8888:
248dbc23
DA		 5457 *depth = 32;
5458 *bpp = 32;
5459 break;
5460 default:
23c453a4
VS		 5461 DRM_DEBUG_KMS("unsupported pixel format %s\n",
5462 drm_get_format_name(format));
248dbc23
DA		 5463 *depth = 0;
5464 *bpp = 0;
5465 break;
5466 }
5467}
5468EXPORT_SYMBOL(drm_fb_get_bpp_depth);
141670e9
VS		 5469
5470/**
5471 * drm_format_num_planes - get the number of planes for format
5472 * @format: pixel format (DRM_FORMAT_*)
5473 *
c8e32cc1 5474 * Returns:
141670e9
VS		 5475 * The number of planes used by the specified pixel format.
5476 */
5477int drm_format_num_planes(uint32_t format)
5478{
5479 switch (format) {
5480 case DRM_FORMAT_YUV410:
5481 case DRM_FORMAT_YVU410:
5482 case DRM_FORMAT_YUV411:
5483 case DRM_FORMAT_YVU411:
5484 case DRM_FORMAT_YUV420:
5485 case DRM_FORMAT_YVU420:
5486 case DRM_FORMAT_YUV422:
5487 case DRM_FORMAT_YVU422:
5488 case DRM_FORMAT_YUV444:
5489 case DRM_FORMAT_YVU444:
5490 return 3;
5491 case DRM_FORMAT_NV12:
5492 case DRM_FORMAT_NV21:
5493 case DRM_FORMAT_NV16:
5494 case DRM_FORMAT_NV61:
ba623f6a
LP		 5495 case DRM_FORMAT_NV24:
5496 case DRM_FORMAT_NV42:
141670e9
VS		 5497 return 2;
5498 default:
5499 return 1;
5500 }
5501}
5502EXPORT_SYMBOL(drm_format_num_planes);
5a86bd55
VS		 5503
5504/**
5505 * drm_format_plane_cpp - determine the bytes per pixel value
5506 * @format: pixel format (DRM_FORMAT_*)
5507 * @plane: plane index
5508 *
c8e32cc1 5509 * Returns:
5a86bd55
VS		 5510 * The bytes per pixel value for the specified plane.
5511 */
5512int drm_format_plane_cpp(uint32_t format, int plane)
5513{
5514 unsigned int depth;
5515 int bpp;
5516
5517 if (plane >= drm_format_num_planes(format))
5518 return 0;
5519
5520 switch (format) {
5521 case DRM_FORMAT_YUYV:
5522 case DRM_FORMAT_YVYU:
5523 case DRM_FORMAT_UYVY:
5524 case DRM_FORMAT_VYUY:
5525 return 2;
5526 case DRM_FORMAT_NV12:
5527 case DRM_FORMAT_NV21:
5528 case DRM_FORMAT_NV16:
5529 case DRM_FORMAT_NV61:
ba623f6a
LP		 5530 case DRM_FORMAT_NV24:
5531 case DRM_FORMAT_NV42:
5a86bd55
VS		 5532 return plane ? 2 : 1;
5533 case DRM_FORMAT_YUV410:
5534 case DRM_FORMAT_YVU410:
5535 case DRM_FORMAT_YUV411:
5536 case DRM_FORMAT_YVU411:
5537 case DRM_FORMAT_YUV420:
5538 case DRM_FORMAT_YVU420:
5539 case DRM_FORMAT_YUV422:
5540 case DRM_FORMAT_YVU422:
5541 case DRM_FORMAT_YUV444:
5542 case DRM_FORMAT_YVU444:
5543 return 1;
5544 default:
5545 drm_fb_get_bpp_depth(format, &depth, &bpp);
5546 return bpp >> 3;
5547 }
5548}
5549EXPORT_SYMBOL(drm_format_plane_cpp);
01b68b04
VS		 5550
5551/**
5552 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
5553 * @format: pixel format (DRM_FORMAT_*)
5554 *
c8e32cc1 5555 * Returns:
01b68b04
VS		 5556 * The horizontal chroma subsampling factor for the
5557 * specified pixel format.
5558 */
5559int drm_format_horz_chroma_subsampling(uint32_t format)
5560{
5561 switch (format) {
5562 case DRM_FORMAT_YUV411:
5563 case DRM_FORMAT_YVU411:
5564 case DRM_FORMAT_YUV410:
5565 case DRM_FORMAT_YVU410:
5566 return 4;
5567 case DRM_FORMAT_YUYV:
5568 case DRM_FORMAT_YVYU:
5569 case DRM_FORMAT_UYVY:
5570 case DRM_FORMAT_VYUY:
5571 case DRM_FORMAT_NV12:
5572 case DRM_FORMAT_NV21:
5573 case DRM_FORMAT_NV16:
5574 case DRM_FORMAT_NV61:
5575 case DRM_FORMAT_YUV422:
5576 case DRM_FORMAT_YVU422:
5577 case DRM_FORMAT_YUV420:
5578 case DRM_FORMAT_YVU420:
5579 return 2;
5580 default:
5581 return 1;
5582 }
5583}
5584EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
5585
5586/**
5587 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
5588 * @format: pixel format (DRM_FORMAT_*)
5589 *
c8e32cc1 5590 * Returns:
01b68b04
VS		 5591 * The vertical chroma subsampling factor for the
5592 * specified pixel format.
5593 */
5594int drm_format_vert_chroma_subsampling(uint32_t format)
5595{
5596 switch (format) {
5597 case DRM_FORMAT_YUV410:
5598 case DRM_FORMAT_YVU410:
5599 return 4;
5600 case DRM_FORMAT_YUV420:
5601 case DRM_FORMAT_YVU420:
5602 case DRM_FORMAT_NV12:
5603 case DRM_FORMAT_NV21:
5604 return 2;
5605 default:
5606 return 1;
5607 }
5608}
5609EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
87d24fc3 5610
3c9855f6
VS		 5611/**
5612 * drm_rotation_simplify() - Try to simplify the rotation
5613 * @rotation: Rotation to be simplified
5614 * @supported_rotations: Supported rotations
5615 *
5616 * Attempt to simplify the rotation to a form that is supported.
5617 * Eg. if the hardware supports everything except DRM_REFLECT_X
5618 * one could call this function like this:
5619 *
5620 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) |
5621 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) |
5622 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y));
5623 *
5624 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of
5625 * transforms the hardware supports, this function may not
5626 * be able to produce a supported transform, so the caller should
5627 * check the result afterwards.
5628 */
5629unsigned int drm_rotation_simplify(unsigned int rotation,
5630 unsigned int supported_rotations)
5631{
5632 if (rotation & ~supported_rotations) {
5633 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y);
14152c8d
JL		 5634 rotation = (rotation & DRM_REFLECT_MASK) |
5635 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4);
3c9855f6
VS		 5636 }
5637
5638 return rotation;
5639}
5640EXPORT_SYMBOL(drm_rotation_simplify);
5641
87d24fc3
LP		 5642/**
5643 * drm_mode_config_init - initialize DRM mode_configuration structure
5644 * @dev: DRM device
5645 *
5646 * Initialize @dev's mode_config structure, used for tracking the graphics
5647 * configuration of @dev.
5648 *
5649 * Since this initializes the modeset locks, no locking is possible. Which is no
5650 * problem, since this should happen single threaded at init time. It is the
5651 * driver's problem to ensure this guarantee.
5652 *
5653 */
5654void drm_mode_config_init(struct drm_device *dev)
5655{
5656 mutex_init(&dev->mode_config.mutex);
51fd371b 5657 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
87d24fc3
LP		 5658 mutex_init(&dev->mode_config.idr_mutex);
5659 mutex_init(&dev->mode_config.fb_lock);
8fb6e7a5 5660 mutex_init(&dev->mode_config.blob_lock);
87d24fc3
LP		 5661 INIT_LIST_HEAD(&dev->mode_config.fb_list);
5662 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
5663 INIT_LIST_HEAD(&dev->mode_config.connector_list);
5664 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
5665 INIT_LIST_HEAD(&dev->mode_config.property_list);
5666 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
5667 INIT_LIST_HEAD(&dev->mode_config.plane_list);
5668 idr_init(&dev->mode_config.crtc_idr);
138f9ebb 5669 idr_init(&dev->mode_config.tile_idr);
87d24fc3
LP		 5670
5671 drm_modeset_lock_all(dev);
6b4959f4 5672 drm_mode_create_standard_properties(dev);
87d24fc3
LP		 5673 drm_modeset_unlock_all(dev);
5674
5675 /* Just to be sure */
5676 dev->mode_config.num_fb = 0;
5677 dev->mode_config.num_connector = 0;
5678 dev->mode_config.num_crtc = 0;
5679 dev->mode_config.num_encoder = 0;
e27dde3e
MR		 5680 dev->mode_config.num_overlay_plane = 0;
5681 dev->mode_config.num_total_plane = 0;
87d24fc3
LP		 5682}
5683EXPORT_SYMBOL(drm_mode_config_init);
5684
5685/**
5686 * drm_mode_config_cleanup - free up DRM mode_config info
5687 * @dev: DRM device
5688 *
5689 * Free up all the connectors and CRTCs associated with this DRM device, then
5690 * free up the framebuffers and associated buffer objects.
5691 *
5692 * Note that since this /should/ happen single-threaded at driver/device
5693 * teardown time, no locking is required. It's the driver's job to ensure that
5694 * this guarantee actually holds true.
5695 *
5696 * FIXME: cleanup any dangling user buffer objects too
5697 */
5698void drm_mode_config_cleanup(struct drm_device *dev)
5699{
5700 struct drm_connector *connector, *ot;
5701 struct drm_crtc *crtc, *ct;
5702 struct drm_encoder *encoder, *enct;
5703 struct drm_framebuffer *fb, *fbt;
5704 struct drm_property *property, *pt;
5705 struct drm_property_blob *blob, *bt;
5706 struct drm_plane *plane, *plt;
5707
5708 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
5709 head) {
5710 encoder->funcs->destroy(encoder);
5711 }
5712
5713 list_for_each_entry_safe(connector, ot,
5714 &dev->mode_config.connector_list, head) {
5715 connector->funcs->destroy(connector);
5716 }
5717
5718 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
5719 head) {
5720 drm_property_destroy(dev, property);
5721 }
5722
5723 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
e2f5d2ea 5724 head_global) {
6bcacf51 5725 drm_property_unreference_blob(blob);
87d24fc3
LP		 5726 }
5727
5728 /*
5729 * Single-threaded teardown context, so it's not required to grab the
5730 * fb_lock to protect against concurrent fb_list access. Contrary, it
5731 * would actually deadlock with the drm_framebuffer_cleanup function.
5732 *
5733 * Also, if there are any framebuffers left, that's a driver leak now,
5734 * so politely WARN about this.
5735 */
5736 WARN_ON(!list_empty(&dev->mode_config.fb_list));
5737 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
c099b55a 5738 drm_framebuffer_free(&fb->refcount);
87d24fc3
LP		 5739 }
5740
5741 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
5742 head) {
5743 plane->funcs->destroy(plane);
5744 }
5745
5746 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
5747 crtc->funcs->destroy(crtc);
5748 }
5749
138f9ebb 5750 idr_destroy(&dev->mode_config.tile_idr);
87d24fc3 5751 idr_destroy(&dev->mode_config.crtc_idr);
51fd371b 5752 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
87d24fc3
LP		 5753}
5754EXPORT_SYMBOL(drm_mode_config_cleanup);
c1df5f3c
VS		 5755
5756struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
5757 unsigned int supported_rotations)
5758{
5759 static const struct drm_prop_enum_list props[] = {
5760 { DRM_ROTATE_0, "rotate-0" },
5761 { DRM_ROTATE_90, "rotate-90" },
5762 { DRM_ROTATE_180, "rotate-180" },
5763 { DRM_ROTATE_270, "rotate-270" },
5764 { DRM_REFLECT_X, "reflect-x" },
5765 { DRM_REFLECT_Y, "reflect-y" },
5766 };
5767
5768 return drm_property_create_bitmask(dev, 0, "rotation",
5769 props, ARRAY_SIZE(props),
5770 supported_rotations);
5771}
5772EXPORT_SYMBOL(drm_mode_create_rotation_property);
138f9ebb
DA		 5773
5774/**
5775 * DOC: Tile group
5776 *
5777 * Tile groups are used to represent tiled monitors with a unique
5778 * integer identifier. Tiled monitors using DisplayID v1.3 have
5779 * a unique 8-byte handle, we store this in a tile group, so we
5780 * have a common identifier for all tiles in a monitor group.
5781 */
5782static void drm_tile_group_free(struct kref *kref)
5783{
5784 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
5785 struct drm_device *dev = tg->dev;
5786 mutex_lock(&dev->mode_config.idr_mutex);
5787 idr_remove(&dev->mode_config.tile_idr, tg->id);
5788 mutex_unlock(&dev->mode_config.idr_mutex);
5789 kfree(tg);
5790}
5791
5792/**
5793 * drm_mode_put_tile_group - drop a reference to a tile group.
5794 * @dev: DRM device
5795 * @tg: tile group to drop reference to.
5796 *
5797 * drop reference to tile group and free if 0.
5798 */
5799void drm_mode_put_tile_group(struct drm_device *dev,
5800 struct drm_tile_group *tg)
5801{
5802 kref_put(&tg->refcount, drm_tile_group_free);
5803}
5804
5805/**
5806 * drm_mode_get_tile_group - get a reference to an existing tile group
5807 * @dev: DRM device
5808 * @topology: 8-bytes unique per monitor.
5809 *
5810 * Use the unique bytes to get a reference to an existing tile group.
5811 *
5812 * RETURNS:
5813 * tile group or NULL if not found.
5814 */
5815struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
5816 char topology[8])
5817{
5818 struct drm_tile_group *tg;
5819 int id;
5820 mutex_lock(&dev->mode_config.idr_mutex);
5821 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
5822 if (!memcmp(tg->group_data, topology, 8)) {
5823 if (!kref_get_unless_zero(&tg->refcount))
5824 tg = NULL;
5825 mutex_unlock(&dev->mode_config.idr_mutex);
5826 return tg;
5827 }
5828 }
5829 mutex_unlock(&dev->mode_config.idr_mutex);
5830 return NULL;
5831}
81ddd1bc 5832EXPORT_SYMBOL(drm_mode_get_tile_group);
138f9ebb
DA		 5833
5834/**
5835 * drm_mode_create_tile_group - create a tile group from a displayid description
5836 * @dev: DRM device
5837 * @topology: 8-bytes unique per monitor.
5838 *
5839 * Create a tile group for the unique monitor, and get a unique
5840 * identifier for the tile group.
5841 *
5842 * RETURNS:
5843 * new tile group or error.
5844 */
5845struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
5846 char topology[8])
5847{
5848 struct drm_tile_group *tg;
5849 int ret;
5850
5851 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
5852 if (!tg)
5853 return ERR_PTR(-ENOMEM);
5854
5855 kref_init(&tg->refcount);
5856 memcpy(tg->group_data, topology, 8);
5857 tg->dev = dev;
5858
5859 mutex_lock(&dev->mode_config.idr_mutex);
5860 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
5861 if (ret >= 0) {
5862 tg->id = ret;
5863 } else {
5864 kfree(tg);
5865 tg = ERR_PTR(ret);
5866 }
5867
5868 mutex_unlock(&dev->mode_config.idr_mutex);
5869 return tg;
5870}
81ddd1bc 5871EXPORT_SYMBOL(drm_mode_create_tile_group);
Linux kernel - Deliverables
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