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drm: Add DRM_ROTATE_MASK and DRM_REFLECT_MASK
[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:
f453ba04
DA		 309 * New unique (relative to other objects in @dev) integer identifier for the
310 * object.
311 */
8bd441b2
DV		 312int drm_mode_object_get(struct drm_device *dev,
313 struct drm_mode_object *obj, uint32_t obj_type)
f453ba04 314{
2ee39452
DA		 315 return drm_mode_object_get_reg(dev, obj, obj_type, true);
316}
f453ba04 317
2ee39452
DA		 318static void drm_mode_object_register(struct drm_device *dev,
319 struct drm_mode_object *obj)
320{
ad2563c2 321 mutex_lock(&dev->mode_config.idr_mutex);
2ee39452 322 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
ad2563c2 323 mutex_unlock(&dev->mode_config.idr_mutex);
f453ba04
DA		 324}
325
326/**
065a50ed 327 * drm_mode_object_put - free a modeset identifer
f453ba04 328 * @dev: DRM device
065a50ed 329 * @object: object to free
f453ba04 330 *
c8e32cc1
DV		 331 * Free @id from @dev's unique identifier pool. Note that despite the _get
332 * postfix modeset identifiers are _not_ reference counted. Hence don't use this
333 * for reference counted modeset objects like framebuffers.
f453ba04 334 */
8bd441b2
DV		 335void drm_mode_object_put(struct drm_device *dev,
336 struct drm_mode_object *object)
f453ba04 337{
ad2563c2 338 mutex_lock(&dev->mode_config.idr_mutex);
f453ba04 339 idr_remove(&dev->mode_config.crtc_idr, object->id);
ad2563c2 340 mutex_unlock(&dev->mode_config.idr_mutex);
f453ba04
DA		 341}
342
98f75de4
RC		 343static struct drm_mode_object *_object_find(struct drm_device *dev,
344 uint32_t id, uint32_t type)
345{
346 struct drm_mode_object *obj = NULL;
347
348 mutex_lock(&dev->mode_config.idr_mutex);
349 obj = idr_find(&dev->mode_config.crtc_idr, id);
168c02ec
DV		 350 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
351 obj = NULL;
352 if (obj && obj->id != id)
353 obj = NULL;
354 /* don't leak out unref'd fb's */
6bcacf51
DS		 355 if (obj &&
356 (obj->type == DRM_MODE_OBJECT_FB ||
357 obj->type == DRM_MODE_OBJECT_BLOB))
98f75de4
RC		 358 obj = NULL;
359 mutex_unlock(&dev->mode_config.idr_mutex);
360
361 return obj;
362}
363
786b99ed
DV		 364/**
365 * drm_mode_object_find - look up a drm object with static lifetime
366 * @dev: drm device
367 * @id: id of the mode object
368 * @type: type of the mode object
369 *
370 * Note that framebuffers cannot be looked up with this functions - since those
98f75de4
RC		 371 * are reference counted, they need special treatment. Even with
372 * DRM_MODE_OBJECT_ANY (although that will simply return NULL
373 * rather than WARN_ON()).
786b99ed 374 */
7a9c9060
DV		 375struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
376 uint32_t id, uint32_t type)
f453ba04 377{
ad2563c2 378 struct drm_mode_object *obj = NULL;
f453ba04 379
786b99ed
DV		 380 /* Framebuffers are reference counted and need their own lookup
381 * function.*/
6bcacf51 382 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB);
98f75de4 383 obj = _object_find(dev, id, type);
f453ba04
DA		 384 return obj;
385}
386EXPORT_SYMBOL(drm_mode_object_find);
387
f453ba04
DA		 388/**
389 * drm_framebuffer_init - initialize a framebuffer
390 * @dev: DRM device
065a50ed
DV		 391 * @fb: framebuffer to be initialized
392 * @funcs: ... with these functions
f453ba04 393 *
f453ba04
DA		 394 * Allocates an ID for the framebuffer's parent mode object, sets its mode
395 * functions & device file and adds it to the master fd list.
396 *
4b096ac1
DV		 397 * IMPORTANT:
398 * This functions publishes the fb and makes it available for concurrent access
399 * by other users. Which means by this point the fb _must_ be fully set up -
400 * since all the fb attributes are invariant over its lifetime, no further
401 * locking but only correct reference counting is required.
402 *
c8e32cc1 403 * Returns:
af901ca1 404 * Zero on success, error code on failure.
f453ba04
DA		 405 */
406int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
407 const struct drm_framebuffer_funcs *funcs)
408{
409 int ret;
410
4b096ac1 411 mutex_lock(&dev->mode_config.fb_lock);
f7eff60e 412 kref_init(&fb->refcount);
4b096ac1
DV		 413 INIT_LIST_HEAD(&fb->filp_head);
414 fb->dev = dev;
415 fb->funcs = funcs;
f7eff60e 416
f453ba04 417 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
6bfc56aa 418 if (ret)
4b096ac1 419 goto out;
f453ba04 420
f453ba04
DA		 421 dev->mode_config.num_fb++;
422 list_add(&fb->head, &dev->mode_config.fb_list);
4b096ac1
DV		 423out:
424 mutex_unlock(&dev->mode_config.fb_lock);
f453ba04
DA		 425
426 return 0;
427}
428EXPORT_SYMBOL(drm_framebuffer_init);
429
83f45fc3
DV		 430/* dev->mode_config.fb_lock must be held! */
431static void __drm_framebuffer_unregister(struct drm_device *dev,
432 struct drm_framebuffer *fb)
433{
434 mutex_lock(&dev->mode_config.idr_mutex);
435 idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
436 mutex_unlock(&dev->mode_config.idr_mutex);
437
438 fb->base.id = 0;
439}
440
f7eff60e
RC		 441static void drm_framebuffer_free(struct kref *kref)
442{
443 struct drm_framebuffer *fb =
444 container_of(kref, struct drm_framebuffer, refcount);
83f45fc3
DV		 445 struct drm_device *dev = fb->dev;
446
447 /*
448 * The lookup idr holds a weak reference, which has not necessarily been
449 * removed at this point. Check for that.
450 */
451 mutex_lock(&dev->mode_config.fb_lock);
452 if (fb->base.id) {
453 /* Mark fb as reaped and drop idr ref. */
454 __drm_framebuffer_unregister(dev, fb);
455 }
456 mutex_unlock(&dev->mode_config.fb_lock);
457
f7eff60e
RC		 458 fb->funcs->destroy(fb);
459}
460
2b677e8c
DV		 461static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
462 uint32_t id)
463{
464 struct drm_mode_object *obj = NULL;
465 struct drm_framebuffer *fb;
466
467 mutex_lock(&dev->mode_config.idr_mutex);
468 obj = idr_find(&dev->mode_config.crtc_idr, id);
469 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
470 fb = NULL;
471 else
472 fb = obj_to_fb(obj);
473 mutex_unlock(&dev->mode_config.idr_mutex);
474
475 return fb;
476}
477
786b99ed
DV		 478/**
479 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
480 * @dev: drm device
481 * @id: id of the fb object
482 *
483 * If successful, this grabs an additional reference to the framebuffer -
484 * callers need to make sure to eventually unreference the returned framebuffer
c8e32cc1 485 * again, using @drm_framebuffer_unreference.
786b99ed
DV		 486 */
487struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
488 uint32_t id)
489{
786b99ed
DV		 490 struct drm_framebuffer *fb;
491
492 mutex_lock(&dev->mode_config.fb_lock);
2b677e8c 493 fb = __drm_framebuffer_lookup(dev, id);
83f45fc3
DV		 494 if (fb) {
495 if (!kref_get_unless_zero(&fb->refcount))
496 fb = NULL;
497 }
786b99ed
DV		 498 mutex_unlock(&dev->mode_config.fb_lock);
499
500 return fb;
501}
502EXPORT_SYMBOL(drm_framebuffer_lookup);
503
f7eff60e
RC		 504/**
505 * drm_framebuffer_unreference - unref a framebuffer
065a50ed
DV		 506 * @fb: framebuffer to unref
507 *
508 * This functions decrements the fb's refcount and frees it if it drops to zero.
f7eff60e
RC		 509 */
510void drm_framebuffer_unreference(struct drm_framebuffer *fb)
511{
8291272a 512 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
f7eff60e
RC		 513 kref_put(&fb->refcount, drm_framebuffer_free);
514}
515EXPORT_SYMBOL(drm_framebuffer_unreference);
516
517/**
518 * drm_framebuffer_reference - incr the fb refcnt
065a50ed 519 * @fb: framebuffer
c8e32cc1
DV		 520 *
521 * This functions increments the fb's refcount.
f7eff60e
RC		 522 */
523void drm_framebuffer_reference(struct drm_framebuffer *fb)
524{
8291272a 525 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
f7eff60e
RC		 526 kref_get(&fb->refcount);
527}
528EXPORT_SYMBOL(drm_framebuffer_reference);
529
36206361
DV		 530/**
531 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
532 * @fb: fb to unregister
533 *
534 * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
535 * those used for fbdev. Note that the caller must hold a reference of it's own,
536 * i.e. the object may not be destroyed through this call (since it'll lead to a
537 * locking inversion).
538 */
539void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
540{
a39a357c
DV		 541 struct drm_device *dev;
542
543 if (!fb)
544 return;
545
546 dev = fb->dev;
2b677e8c
DV		 547
548 mutex_lock(&dev->mode_config.fb_lock);
549 /* Mark fb as reaped and drop idr ref. */
550 __drm_framebuffer_unregister(dev, fb);
551 mutex_unlock(&dev->mode_config.fb_lock);
36206361
DV		 552}
553EXPORT_SYMBOL(drm_framebuffer_unregister_private);
554
f453ba04
DA		 555/**
556 * drm_framebuffer_cleanup - remove a framebuffer object
557 * @fb: framebuffer to remove
558 *
c8e32cc1
DV		 559 * Cleanup framebuffer. This function is intended to be used from the drivers
560 * ->destroy callback. It can also be used to clean up driver private
561 * framebuffers embedded into a larger structure.
36206361
DV		 562 *
563 * Note that this function does not remove the fb from active usuage - if it is
564 * still used anywhere, hilarity can ensue since userspace could call getfb on
565 * the id and get back -EINVAL. Obviously no concern at driver unload time.
566 *
567 * Also, the framebuffer will not be removed from the lookup idr - for
568 * user-created framebuffers this will happen in in the rmfb ioctl. For
569 * driver-private objects (e.g. for fbdev) drivers need to explicitly call
570 * drm_framebuffer_unregister_private.
f453ba04
DA		 571 */
572void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
f7eff60e
RC		 573{
574 struct drm_device *dev = fb->dev;
8faf6b18 575
4b096ac1 576 mutex_lock(&dev->mode_config.fb_lock);
f7eff60e
RC		 577 list_del(&fb->head);
578 dev->mode_config.num_fb--;
4b096ac1 579 mutex_unlock(&dev->mode_config.fb_lock);
f7eff60e
RC		 580}
581EXPORT_SYMBOL(drm_framebuffer_cleanup);
582
583/**
584 * drm_framebuffer_remove - remove and unreference a framebuffer object
585 * @fb: framebuffer to remove
586 *
f7eff60e 587 * Scans all the CRTCs and planes in @dev's mode_config. If they're
36206361 588 * using @fb, removes it, setting it to NULL. Then drops the reference to the
b62584e3
DV		 589 * passed-in framebuffer. Might take the modeset locks.
590 *
591 * Note that this function optimizes the cleanup away if the caller holds the
592 * last reference to the framebuffer. It is also guaranteed to not take the
593 * modeset locks in this case.
f7eff60e
RC		 594 */
595void drm_framebuffer_remove(struct drm_framebuffer *fb)
f453ba04 596{
a39a357c 597 struct drm_device *dev;
f453ba04 598 struct drm_crtc *crtc;
8cf5c917 599 struct drm_plane *plane;
5ef5f72f
DA		 600 struct drm_mode_set set;
601 int ret;
f453ba04 602
a39a357c
DV		 603 if (!fb)
604 return;
605
606 dev = fb->dev;
607
4b096ac1 608 WARN_ON(!list_empty(&fb->filp_head));
8faf6b18 609
b62584e3
DV		 610 /*
611 * drm ABI mandates that we remove any deleted framebuffers from active
612 * useage. But since most sane clients only remove framebuffers they no
613 * longer need, try to optimize this away.
614 *
615 * Since we're holding a reference ourselves, observing a refcount of 1
616 * means that we're the last holder and can skip it. Also, the refcount
617 * can never increase from 1 again, so we don't need any barriers or
618 * locks.
619 *
620 * Note that userspace could try to race with use and instate a new
621 * usage _after_ we've cleared all current ones. End result will be an
622 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
623 * in this manner.
624 */
625 if (atomic_read(&fb->refcount.refcount) > 1) {
626 drm_modeset_lock_all(dev);
627 /* remove from any CRTC */
6295d607 628 drm_for_each_crtc(crtc, dev) {
f4510a27 629 if (crtc->primary->fb == fb) {
b62584e3
DV		 630 /* should turn off the crtc */
631 memset(&set, 0, sizeof(struct drm_mode_set));
632 set.crtc = crtc;
633 set.fb = NULL;
634 ret = drm_mode_set_config_internal(&set);
635 if (ret)
636 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
637 }
5ef5f72f 638 }
f453ba04 639
6295d607 640 drm_for_each_plane(plane, dev) {
9125e618
VS		 641 if (plane->fb == fb)
642 drm_plane_force_disable(plane);
8cf5c917 643 }
b62584e3 644 drm_modeset_unlock_all(dev);
8cf5c917
JB		 645 }
646
f7eff60e 647 drm_framebuffer_unreference(fb);
f453ba04 648}
f7eff60e 649EXPORT_SYMBOL(drm_framebuffer_remove);
f453ba04 650
51fd371b
RC		 651DEFINE_WW_CLASS(crtc_ww_class);
652
f453ba04 653/**
e13161af
MR		 654 * drm_crtc_init_with_planes - Initialise a new CRTC object with
655 * specified primary and cursor planes.
f453ba04
DA		 656 * @dev: DRM device
657 * @crtc: CRTC object to init
e13161af
MR		 658 * @primary: Primary plane for CRTC
659 * @cursor: Cursor plane for CRTC
f453ba04
DA		 660 * @funcs: callbacks for the new CRTC
661 *
ad6f5c34 662 * Inits a new object created as base part of a driver crtc object.
6bfc56aa 663 *
c8e32cc1 664 * Returns:
6bfc56aa 665 * Zero on success, error code on failure.
f453ba04 666 */
e13161af
MR		 667int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
668 struct drm_plane *primary,
fc1d3e44 669 struct drm_plane *cursor,
e13161af 670 const struct drm_crtc_funcs *funcs)
f453ba04 671{
51fd371b 672 struct drm_mode_config *config = &dev->mode_config;
6bfc56aa
VS		 673 int ret;
674
522cf91f
BG		 675 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
676 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
677
f453ba04
DA		 678 crtc->dev = dev;
679 crtc->funcs = funcs;
7c80e128 680 crtc->invert_dimensions = false;
f453ba04 681
51fd371b 682 drm_modeset_lock_init(&crtc->mutex);
6bfc56aa
VS		 683 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
684 if (ret)
baf698b0 685 return ret;
f453ba04 686
bffd9de0
PZ		 687 crtc->base.properties = &crtc->properties;
688
51fd371b
RC		 689 list_add_tail(&crtc->head, &config->crtc_list);
690 config->num_crtc++;
6bfc56aa 691
e13161af 692 crtc->primary = primary;
fc1d3e44 693 crtc->cursor = cursor;
e13161af
MR		 694 if (primary)
695 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
fc1d3e44
MR		 696 if (cursor)
697 cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
e13161af 698
eab3bbef
DV		 699 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
700 drm_object_attach_property(&crtc->base, config->prop_active, 0);
955f3c33 701 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
eab3bbef
DV		 702 }
703
baf698b0 704 return 0;
f453ba04 705}
e13161af 706EXPORT_SYMBOL(drm_crtc_init_with_planes);
f453ba04
DA		 707
708/**
ad6f5c34 709 * drm_crtc_cleanup - Clean up the core crtc usage
f453ba04
DA		 710 * @crtc: CRTC to cleanup
711 *
ad6f5c34
VS		 712 * This function cleans up @crtc and removes it from the DRM mode setting
713 * core. Note that the function does *not* free the crtc structure itself,
714 * this is the responsibility of the caller.
f453ba04
DA		 715 */
716void drm_crtc_cleanup(struct drm_crtc *crtc)
717{
718 struct drm_device *dev = crtc->dev;
719
9e1c156f
SK		 720 kfree(crtc->gamma_store);
721 crtc->gamma_store = NULL;
f453ba04 722
51fd371b
RC		 723 drm_modeset_lock_fini(&crtc->mutex);
724
f453ba04
DA		 725 drm_mode_object_put(dev, &crtc->base);
726 list_del(&crtc->head);
727 dev->mode_config.num_crtc--;
3009c037
TR		 728
729 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
730 if (crtc->state && crtc->funcs->atomic_destroy_state)
731 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
a18c0af1
TR		 732
733 memset(crtc, 0, sizeof(*crtc));
f453ba04
DA		 734}
735EXPORT_SYMBOL(drm_crtc_cleanup);
736
db5f7a6e
RK		 737/**
738 * drm_crtc_index - find the index of a registered CRTC
739 * @crtc: CRTC to find index for
740 *
741 * Given a registered CRTC, return the index of that CRTC within a DRM
742 * device's list of CRTCs.
743 */
744unsigned int drm_crtc_index(struct drm_crtc *crtc)
745{
746 unsigned int index = 0;
747 struct drm_crtc *tmp;
748
e4f62546 749 drm_for_each_crtc(tmp, crtc->dev) {
db5f7a6e
RK		 750 if (tmp == crtc)
751 return index;
752
753 index++;
754 }
755
756 BUG();
757}
758EXPORT_SYMBOL(drm_crtc_index);
759
86f422d5 760/*
f453ba04
DA		 761 * drm_mode_remove - remove and free a mode
762 * @connector: connector list to modify
763 * @mode: mode to remove
764 *
f453ba04
DA		 765 * Remove @mode from @connector's mode list, then free it.
766 */
86f422d5
LD		 767static void drm_mode_remove(struct drm_connector *connector,
768 struct drm_display_mode *mode)
f453ba04
DA		 769{
770 list_del(&mode->head);
554f1d78 771 drm_mode_destroy(connector->dev, mode);
f453ba04 772}
f453ba04 773
b5571e9d
BB		 774/**
775 * drm_display_info_set_bus_formats - set the supported bus formats
776 * @info: display info to store bus formats in
e37bfa1a
BB		 777 * @formats: array containing the supported bus formats
778 * @num_formats: the number of entries in the fmts array
b5571e9d
BB		 779 *
780 * Store the supported bus formats in display info structure.
781 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
782 * a full list of available formats.
783 */
784int drm_display_info_set_bus_formats(struct drm_display_info *info,
785 const u32 *formats,
786 unsigned int num_formats)
787{
788 u32 *fmts = NULL;
789
790 if (!formats && num_formats)
791 return -EINVAL;
792
793 if (formats && num_formats) {
794 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
795 GFP_KERNEL);
944579c5 796 if (!fmts)
b5571e9d
BB		 797 return -ENOMEM;
798 }
799
800 kfree(info->bus_formats);
801 info->bus_formats = fmts;
802 info->num_bus_formats = num_formats;
803
804 return 0;
805}
806EXPORT_SYMBOL(drm_display_info_set_bus_formats);
807
eaf99c74
CW		 808/**
809 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
810 * @connector: connector to quwery
eaf99c74
CW		 811 *
812 * The kernel supports per-connector configration of its consoles through
813 * use of the video= parameter. This function parses that option and
814 * extracts the user's specified mode (or enable/disable status) for a
815 * particular connector. This is typically only used during the early fbdev
816 * setup.
817 */
818static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
819{
820 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
821 char *option = NULL;
822
823 if (fb_get_options(connector->name, &option))
824 return;
825
826 if (!drm_mode_parse_command_line_for_connector(option,
827 connector,
828 mode))
829 return;
830
831 if (mode->force) {
832 const char *s;
833
834 switch (mode->force) {
835 case DRM_FORCE_OFF:
836 s = "OFF";
837 break;
838 case DRM_FORCE_ON_DIGITAL:
839 s = "ON - dig";
840 break;
841 default:
842 case DRM_FORCE_ON:
843 s = "ON";
844 break;
845 }
846
847 DRM_INFO("forcing %s connector %s\n", connector->name, s);
848 connector->force = mode->force;
849 }
850
851 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
852 connector->name,
853 mode->xres, mode->yres,
854 mode->refresh_specified ? mode->refresh : 60,
855 mode->rb ? " reduced blanking" : "",
856 mode->margins ? " with margins" : "",
857 mode->interlace ? " interlaced" : "");
858}
859
f453ba04
DA		 860/**
861 * drm_connector_init - Init a preallocated connector
862 * @dev: DRM device
863 * @connector: the connector to init
864 * @funcs: callbacks for this connector
065a50ed 865 * @connector_type: user visible type of the connector
f453ba04 866 *
f453ba04
DA		 867 * Initialises a preallocated connector. Connectors should be
868 * subclassed as part of driver connector objects.
6bfc56aa 869 *
c8e32cc1 870 * Returns:
6bfc56aa 871 * Zero on success, error code on failure.
f453ba04 872 */
6bfc56aa
VS		 873int drm_connector_init(struct drm_device *dev,
874 struct drm_connector *connector,
875 const struct drm_connector_funcs *funcs,
876 int connector_type)
f453ba04 877{
ae16c597 878 struct drm_mode_config *config = &dev->mode_config;
6bfc56aa 879 int ret;
b21e3afe
IM		 880 struct ida *connector_ida =
881 &drm_connector_enum_list[connector_type].ida;
6bfc56aa 882
84849903 883 drm_modeset_lock_all(dev);
f453ba04 884
2ee39452 885 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
6bfc56aa 886 if (ret)
2abdd313 887 goto out_unlock;
6bfc56aa 888
7e3bdf4a 889 connector->base.properties = &connector->properties;
f453ba04
DA		 890 connector->dev = dev;
891 connector->funcs = funcs;
f453ba04
DA		 892 connector->connector_type = connector_type;
893 connector->connector_type_id =
b21e3afe
IM		 894 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
895 if (connector->connector_type_id < 0) {
896 ret = connector->connector_type_id;
2abdd313 897 goto out_put;
b21e3afe 898 }
2abdd313
JN		 899 connector->name =
900 kasprintf(GFP_KERNEL, "%s-%d",
901 drm_connector_enum_list[connector_type].name,
902 connector->connector_type_id);
903 if (!connector->name) {
904 ret = -ENOMEM;
905 goto out_put;
906 }
907
f453ba04
DA		 908 INIT_LIST_HEAD(&connector->probed_modes);
909 INIT_LIST_HEAD(&connector->modes);
910 connector->edid_blob_ptr = NULL;
5e2cb2f6 911 connector->status = connector_status_unknown;
f453ba04 912
eaf99c74
CW		 913 drm_connector_get_cmdline_mode(connector);
914
c7eb76f4
DV		 915 /* We should add connectors at the end to avoid upsetting the connector
916 * index too much. */
ae16c597
RC		 917 list_add_tail(&connector->head, &config->connector_list);
918 config->num_connector++;
f453ba04 919
a7331e5c 920 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
58495563 921 drm_object_attach_property(&connector->base,
ae16c597 922 config->edid_property,
a7331e5c 923 0);
f453ba04 924
58495563 925 drm_object_attach_property(&connector->base,
ae16c597
RC		 926 config->dpms_property, 0);
927
928 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
929 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
930 }
f453ba04 931
30f65707
TW		 932 connector->debugfs_entry = NULL;
933
2abdd313
JN		 934out_put:
935 if (ret)
936 drm_mode_object_put(dev, &connector->base);
937
938out_unlock:
84849903 939 drm_modeset_unlock_all(dev);
6bfc56aa
VS		 940
941 return ret;
f453ba04
DA		 942}
943EXPORT_SYMBOL(drm_connector_init);
944
945/**
946 * drm_connector_cleanup - cleans up an initialised connector
947 * @connector: connector to cleanup
948 *
f453ba04
DA		 949 * Cleans up the connector but doesn't free the object.
950 */
951void drm_connector_cleanup(struct drm_connector *connector)
952{
953 struct drm_device *dev = connector->dev;
954 struct drm_display_mode *mode, *t;
955
40d9b043
DA		 956 if (connector->tile_group) {
957 drm_mode_put_tile_group(dev, connector->tile_group);
958 connector->tile_group = NULL;
959 }
960
f453ba04
DA		 961 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
962 drm_mode_remove(connector, mode);
963
964 list_for_each_entry_safe(mode, t, &connector->modes, head)
965 drm_mode_remove(connector, mode);
966
b21e3afe
IM		 967 ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
968 connector->connector_type_id);
969
b5571e9d 970 kfree(connector->display_info.bus_formats);
f453ba04 971 drm_mode_object_put(dev, &connector->base);
2abdd313
JN		 972 kfree(connector->name);
973 connector->name = NULL;
f453ba04 974 list_del(&connector->head);
6380c509 975 dev->mode_config.num_connector--;
3009c037
TR		 976
977 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
978 if (connector->state && connector->funcs->atomic_destroy_state)
979 connector->funcs->atomic_destroy_state(connector,
980 connector->state);
a18c0af1
TR		 981
982 memset(connector, 0, sizeof(*connector));
f453ba04
DA		 983}
984EXPORT_SYMBOL(drm_connector_cleanup);
985
10f637bf
DV		 986/**
987 * drm_connector_index - find the index of a registered connector
988 * @connector: connector to find index for
989 *
990 * Given a registered connector, return the index of that connector within a DRM
991 * device's list of connectors.
992 */
993unsigned int drm_connector_index(struct drm_connector *connector)
994{
995 unsigned int index = 0;
996 struct drm_connector *tmp;
c7eb76f4
DV		 997 struct drm_mode_config *config = &connector->dev->mode_config;
998
999 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
10f637bf 1000
9a9f5ce8 1001 drm_for_each_connector(tmp, connector->dev) {
10f637bf
DV		 1002 if (tmp == connector)
1003 return index;
1004
1005 index++;
1006 }
1007
1008 BUG();
1009}
1010EXPORT_SYMBOL(drm_connector_index);
1011
34ea3d38
TW		 1012/**
1013 * drm_connector_register - register a connector
1014 * @connector: the connector to register
1015 *
1016 * Register userspace interfaces for a connector
1017 *
1018 * Returns:
1019 * Zero on success, error code on failure.
1020 */
1021int drm_connector_register(struct drm_connector *connector)
1022{
30f65707
TW		 1023 int ret;
1024
2ee39452
DA		 1025 drm_mode_object_register(connector->dev, &connector->base);
1026
30f65707
TW		 1027 ret = drm_sysfs_connector_add(connector);
1028 if (ret)
1029 return ret;
1030
1031 ret = drm_debugfs_connector_add(connector);
1032 if (ret) {
1033 drm_sysfs_connector_remove(connector);
1034 return ret;
1035 }
1036
1037 return 0;
34ea3d38
TW		 1038}
1039EXPORT_SYMBOL(drm_connector_register);
1040
1041/**
1042 * drm_connector_unregister - unregister a connector
1043 * @connector: the connector to unregister
1044 *
1045 * Unregister userspace interfaces for a connector
1046 */
1047void drm_connector_unregister(struct drm_connector *connector)
1048{
1049 drm_sysfs_connector_remove(connector);
30f65707 1050 drm_debugfs_connector_remove(connector);
34ea3d38
TW		 1051}
1052EXPORT_SYMBOL(drm_connector_unregister);
1053
1054
c8e32cc1
DV		 1055/**
1056 * drm_connector_unplug_all - unregister connector userspace interfaces
1057 * @dev: drm device
1058 *
1059 * This function unregisters all connector userspace interfaces in sysfs. Should
1060 * be call when the device is disconnected, e.g. from an usb driver's
1061 * ->disconnect callback.
1062 */
cbc7e221
DA		 1063void drm_connector_unplug_all(struct drm_device *dev)
1064{
1065 struct drm_connector *connector;
1066
9a9f5ce8 1067 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
cbc7e221 1068 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
34ea3d38 1069 drm_connector_unregister(connector);
cbc7e221
DA		 1070
1071}
1072EXPORT_SYMBOL(drm_connector_unplug_all);
1073
c8e32cc1
DV		 1074/**
1075 * drm_encoder_init - Init a preallocated encoder
1076 * @dev: drm device
1077 * @encoder: the encoder to init
1078 * @funcs: callbacks for this encoder
1079 * @encoder_type: user visible type of the encoder
1080 *
1081 * Initialises a preallocated encoder. Encoder should be
1082 * subclassed as part of driver encoder objects.
1083 *
1084 * Returns:
1085 * Zero on success, error code on failure.
1086 */
6bfc56aa 1087int drm_encoder_init(struct drm_device *dev,
cbc7e221
DA		 1088 struct drm_encoder *encoder,
1089 const struct drm_encoder_funcs *funcs,
1090 int encoder_type)
f453ba04 1091{
6bfc56aa
VS		 1092 int ret;
1093
84849903 1094 drm_modeset_lock_all(dev);
f453ba04 1095
6bfc56aa
VS		 1096 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
1097 if (ret)
e5748946 1098 goto out_unlock;
f453ba04 1099
6bfc56aa 1100 encoder->dev = dev;
f453ba04
DA		 1101 encoder->encoder_type = encoder_type;
1102 encoder->funcs = funcs;
e5748946
JN		 1103 encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
1104 drm_encoder_enum_list[encoder_type].name,
1105 encoder->base.id);
1106 if (!encoder->name) {
1107 ret = -ENOMEM;
1108 goto out_put;
1109 }
f453ba04
DA		 1110
1111 list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
1112 dev->mode_config.num_encoder++;
1113
e5748946
JN		 1114out_put:
1115 if (ret)
1116 drm_mode_object_put(dev, &encoder->base);
1117
1118out_unlock:
84849903 1119 drm_modeset_unlock_all(dev);
6bfc56aa
VS		 1120
1121 return ret;
f453ba04
DA		 1122}
1123EXPORT_SYMBOL(drm_encoder_init);
1124
c8e32cc1
DV		 1125/**
1126 * drm_encoder_cleanup - cleans up an initialised encoder
1127 * @encoder: encoder to cleanup
1128 *
1129 * Cleans up the encoder but doesn't free the object.
1130 */
f453ba04
DA		 1131void drm_encoder_cleanup(struct drm_encoder *encoder)
1132{
1133 struct drm_device *dev = encoder->dev;
4dfd909f 1134
84849903 1135 drm_modeset_lock_all(dev);
f453ba04 1136 drm_mode_object_put(dev, &encoder->base);
e5748946 1137 kfree(encoder->name);
f453ba04 1138 list_del(&encoder->head);
6380c509 1139 dev->mode_config.num_encoder--;
84849903 1140 drm_modeset_unlock_all(dev);
a18c0af1
TR		 1141
1142 memset(encoder, 0, sizeof(*encoder));
f453ba04
DA		 1143}
1144EXPORT_SYMBOL(drm_encoder_cleanup);
1145
35f2c3ae 1146/**
dc415ff9 1147 * drm_universal_plane_init - Initialize a new universal plane object
35f2c3ae
VS		 1148 * @dev: DRM device
1149 * @plane: plane object to init
1150 * @possible_crtcs: bitmask of possible CRTCs
1151 * @funcs: callbacks for the new plane
1152 * @formats: array of supported formats (%DRM_FORMAT_*)
1153 * @format_count: number of elements in @formats
dc415ff9 1154 * @type: type of plane (overlay, primary, cursor)
35f2c3ae 1155 *
dc415ff9 1156 * Initializes a plane object of type @type.
35f2c3ae 1157 *
c8e32cc1 1158 * Returns:
35f2c3ae
VS		 1159 * Zero on success, error code on failure.
1160 */
dc415ff9
MR		 1161int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
1162 unsigned long possible_crtcs,
1163 const struct drm_plane_funcs *funcs,
45e3743a 1164 const uint32_t *formats, unsigned int format_count,
dc415ff9 1165 enum drm_plane_type type)
8cf5c917 1166{
6b4959f4 1167 struct drm_mode_config *config = &dev->mode_config;
6bfc56aa
VS		 1168 int ret;
1169
6bfc56aa
VS		 1170 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
1171 if (ret)
baf698b0 1172 return ret;
6bfc56aa 1173
4d02e2de
DV		 1174 drm_modeset_lock_init(&plane->mutex);
1175
4d93914a 1176 plane->base.properties = &plane->properties;
8cf5c917 1177 plane->dev = dev;
8cf5c917 1178 plane->funcs = funcs;
2f6c5389
TR		 1179 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
1180 GFP_KERNEL);
8cf5c917
JB		 1181 if (!plane->format_types) {
1182 DRM_DEBUG_KMS("out of memory when allocating plane\n");
1183 drm_mode_object_put(dev, &plane->base);
baf698b0 1184 return -ENOMEM;
8cf5c917
JB		 1185 }
1186
308e5bcb 1187 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
8cf5c917
JB		 1188 plane->format_count = format_count;
1189 plane->possible_crtcs = possible_crtcs;
dc415ff9 1190 plane->type = type;
8cf5c917 1191
6b4959f4
RC		 1192 list_add_tail(&plane->head, &config->plane_list);
1193 config->num_total_plane++;
dc415ff9 1194 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
6b4959f4 1195 config->num_overlay_plane++;
8cf5c917 1196
9922ab5a 1197 drm_object_attach_property(&plane->base,
6b4959f4 1198 config->plane_type_property,
9922ab5a
RC		 1199 plane->type);
1200
6b4959f4
RC		 1201 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
1202 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
1203 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
1204 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
1205 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
1206 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
1207 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
1208 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
1209 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
1210 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
1211 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
1212 }
1213
baf698b0 1214 return 0;
8cf5c917 1215}
dc415ff9
MR		 1216EXPORT_SYMBOL(drm_universal_plane_init);
1217
1218/**
1219 * drm_plane_init - Initialize a legacy plane
1220 * @dev: DRM device
1221 * @plane: plane object to init
1222 * @possible_crtcs: bitmask of possible CRTCs
1223 * @funcs: callbacks for the new plane
1224 * @formats: array of supported formats (%DRM_FORMAT_*)
1225 * @format_count: number of elements in @formats
1226 * @is_primary: plane type (primary vs overlay)
1227 *
1228 * Legacy API to initialize a DRM plane.
1229 *
1230 * New drivers should call drm_universal_plane_init() instead.
1231 *
1232 * Returns:
1233 * Zero on success, error code on failure.
1234 */
1235int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
1236 unsigned long possible_crtcs,
1237 const struct drm_plane_funcs *funcs,
45e3743a 1238 const uint32_t *formats, unsigned int format_count,
dc415ff9
MR		 1239 bool is_primary)
1240{
1241 enum drm_plane_type type;
1242
1243 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1244 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
1245 formats, format_count, type);
1246}
8cf5c917
JB		 1247EXPORT_SYMBOL(drm_plane_init);
1248
35f2c3ae
VS		 1249/**
1250 * drm_plane_cleanup - Clean up the core plane usage
1251 * @plane: plane to cleanup
1252 *
1253 * This function cleans up @plane and removes it from the DRM mode setting
1254 * core. Note that the function does *not* free the plane structure itself,
1255 * this is the responsibility of the caller.
1256 */
8cf5c917
JB		 1257void drm_plane_cleanup(struct drm_plane *plane)
1258{
1259 struct drm_device *dev = plane->dev;
1260
84849903 1261 drm_modeset_lock_all(dev);
8cf5c917
JB		 1262 kfree(plane->format_types);
1263 drm_mode_object_put(dev, &plane->base);
dc415ff9
MR		 1264
1265 BUG_ON(list_empty(&plane->head));
1266
1267 list_del(&plane->head);
1268 dev->mode_config.num_total_plane--;
1269 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1270 dev->mode_config.num_overlay_plane--;
84849903 1271 drm_modeset_unlock_all(dev);
3009c037
TR		 1272
1273 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
1274 if (plane->state && plane->funcs->atomic_destroy_state)
1275 plane->funcs->atomic_destroy_state(plane, plane->state);
a18c0af1
TR		 1276
1277 memset(plane, 0, sizeof(*plane));
8cf5c917
JB		 1278}
1279EXPORT_SYMBOL(drm_plane_cleanup);
1280
10f637bf
DV		 1281/**
1282 * drm_plane_index - find the index of a registered plane
1283 * @plane: plane to find index for
1284 *
1285 * Given a registered plane, return the index of that CRTC within a DRM
1286 * device's list of planes.
1287 */
1288unsigned int drm_plane_index(struct drm_plane *plane)
1289{
1290 unsigned int index = 0;
1291 struct drm_plane *tmp;
1292
e4f62546 1293 drm_for_each_plane(tmp, plane->dev) {
10f637bf
DV		 1294 if (tmp == plane)
1295 return index;
1296
1297 index++;
1298 }
1299
1300 BUG();
1301}
1302EXPORT_SYMBOL(drm_plane_index);
1303
f81338a5
CK		 1304/**
1305 * drm_plane_from_index - find the registered plane at an index
1306 * @dev: DRM device
1307 * @idx: index of registered plane to find for
1308 *
1309 * Given a plane index, return the registered plane from DRM device's
1310 * list of planes with matching index.
1311 */
1312struct drm_plane *
1313drm_plane_from_index(struct drm_device *dev, int idx)
1314{
1315 struct drm_plane *plane;
1316 unsigned int i = 0;
1317
6295d607 1318 drm_for_each_plane(plane, dev) {
f81338a5
CK		 1319 if (i == idx)
1320 return plane;
1321 i++;
1322 }
1323 return NULL;
1324}
1325EXPORT_SYMBOL(drm_plane_from_index);
1326
35f2c3ae
VS		 1327/**
1328 * drm_plane_force_disable - Forcibly disable a plane
1329 * @plane: plane to disable
1330 *
1331 * Forces the plane to be disabled.
1332 *
1333 * Used when the plane's current framebuffer is destroyed,
1334 * and when restoring fbdev mode.
1335 */
9125e618
VS		 1336void drm_plane_force_disable(struct drm_plane *plane)
1337{
1338 int ret;
1339
3d30a59b 1340 if (!plane->fb)
9125e618
VS		 1341 return;
1342
3d30a59b 1343 plane->old_fb = plane->fb;
9125e618 1344 ret = plane->funcs->disable_plane(plane);
731cce48 1345 if (ret) {
9125e618 1346 DRM_ERROR("failed to disable plane with busy fb\n");
3d30a59b 1347 plane->old_fb = NULL;
731cce48
DV		 1348 return;
1349 }
9125e618 1350 /* disconnect the plane from the fb and crtc: */
220dd2bc 1351 drm_framebuffer_unreference(plane->old_fb);
3d30a59b 1352 plane->old_fb = NULL;
9125e618
VS		 1353 plane->fb = NULL;
1354 plane->crtc = NULL;
1355}
1356EXPORT_SYMBOL(drm_plane_force_disable);
1357
6b4959f4 1358static int drm_mode_create_standard_properties(struct drm_device *dev)
f453ba04 1359{
356af0e1 1360 struct drm_property *prop;
f453ba04
DA		 1361
1362 /*
1363 * Standard properties (apply to all connectors)
1364 */
356af0e1 1365 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
f453ba04
DA		 1366 DRM_MODE_PROP_IMMUTABLE,
1367 "EDID", 0);
356af0e1
RC		 1368 if (!prop)
1369 return -ENOMEM;
1370 dev->mode_config.edid_property = prop;
f453ba04 1371
356af0e1 1372 prop = drm_property_create_enum(dev, 0,
4a67d391
SH		 1373 "DPMS", drm_dpms_enum_list,
1374 ARRAY_SIZE(drm_dpms_enum_list));
356af0e1
RC		 1375 if (!prop)
1376 return -ENOMEM;
1377 dev->mode_config.dpms_property = prop;
6f134d7b 1378
356af0e1
RC		 1379 prop = drm_property_create(dev,
1380 DRM_MODE_PROP_BLOB |
1381 DRM_MODE_PROP_IMMUTABLE,
1382 "PATH", 0);
1383 if (!prop)
1384 return -ENOMEM;
1385 dev->mode_config.path_property = prop;
f453ba04 1386
356af0e1
RC		 1387 prop = drm_property_create(dev,
1388 DRM_MODE_PROP_BLOB |
1389 DRM_MODE_PROP_IMMUTABLE,
1390 "TILE", 0);
1391 if (!prop)
1392 return -ENOMEM;
1393 dev->mode_config.tile_property = prop;
9922ab5a 1394
6b4959f4 1395 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
9922ab5a
RC		 1396 "type", drm_plane_type_enum_list,
1397 ARRAY_SIZE(drm_plane_type_enum_list));
6b4959f4
RC		 1398 if (!prop)
1399 return -ENOMEM;
1400 dev->mode_config.plane_type_property = prop;
1401
1402 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1403 "SRC_X", 0, UINT_MAX);
1404 if (!prop)
1405 return -ENOMEM;
1406 dev->mode_config.prop_src_x = prop;
1407
1408 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1409 "SRC_Y", 0, UINT_MAX);
1410 if (!prop)
1411 return -ENOMEM;
1412 dev->mode_config.prop_src_y = prop;
1413
1414 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1415 "SRC_W", 0, UINT_MAX);
1416 if (!prop)
1417 return -ENOMEM;
1418 dev->mode_config.prop_src_w = prop;
1419
1420 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1421 "SRC_H", 0, UINT_MAX);
1422 if (!prop)
1423 return -ENOMEM;
1424 dev->mode_config.prop_src_h = prop;
1425
1426 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1427 "CRTC_X", INT_MIN, INT_MAX);
1428 if (!prop)
1429 return -ENOMEM;
1430 dev->mode_config.prop_crtc_x = prop;
1431
1432 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1433 "CRTC_Y", INT_MIN, INT_MAX);
1434 if (!prop)
1435 return -ENOMEM;
1436 dev->mode_config.prop_crtc_y = prop;
1437
1438 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1439 "CRTC_W", 0, INT_MAX);
1440 if (!prop)
1441 return -ENOMEM;
1442 dev->mode_config.prop_crtc_w = prop;
1443
1444 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1445 "CRTC_H", 0, INT_MAX);
1446 if (!prop)
1447 return -ENOMEM;
1448 dev->mode_config.prop_crtc_h = prop;
1449
1450 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1451 "FB_ID", DRM_MODE_OBJECT_FB);
1452 if (!prop)
1453 return -ENOMEM;
1454 dev->mode_config.prop_fb_id = prop;
1455
1456 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1457 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
1458 if (!prop)
1459 return -ENOMEM;
1460 dev->mode_config.prop_crtc_id = prop;
9922ab5a 1461
eab3bbef
DV		 1462 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
1463 "ACTIVE");
1464 if (!prop)
1465 return -ENOMEM;
1466 dev->mode_config.prop_active = prop;
1467
955f3c33
DS		 1468 prop = drm_property_create(dev,
1469 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
1470 "MODE_ID", 0);
1471 if (!prop)
1472 return -ENOMEM;
1473 dev->mode_config.prop_mode_id = prop;
1474
9922ab5a
RC		 1475 return 0;
1476}
1477
f453ba04
DA		 1478/**
1479 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1480 * @dev: DRM device
1481 *
1482 * Called by a driver the first time a DVI-I connector is made.
1483 */
1484int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1485{
1486 struct drm_property *dvi_i_selector;
1487 struct drm_property *dvi_i_subconnector;
f453ba04
DA		 1488
1489 if (dev->mode_config.dvi_i_select_subconnector_property)
1490 return 0;
1491
1492 dvi_i_selector =
4a67d391 1493 drm_property_create_enum(dev, 0,
f453ba04 1494 "select subconnector",
4a67d391 1495 drm_dvi_i_select_enum_list,
f453ba04 1496 ARRAY_SIZE(drm_dvi_i_select_enum_list));
f453ba04
DA		 1497 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1498
4a67d391 1499 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
f453ba04 1500 "subconnector",
4a67d391 1501 drm_dvi_i_subconnector_enum_list,
f453ba04 1502 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
f453ba04
DA		 1503 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1504
1505 return 0;
1506}
1507EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1508
1509/**
1510 * drm_create_tv_properties - create TV specific connector properties
1511 * @dev: DRM device
1512 * @num_modes: number of different TV formats (modes) supported
1513 * @modes: array of pointers to strings containing name of each format
1514 *
1515 * Called by a driver's TV initialization routine, this function creates
1516 * the TV specific connector properties for a given device. Caller is
1517 * responsible for allocating a list of format names and passing them to
1518 * this routine.
1519 */
2f763312
TR		 1520int drm_mode_create_tv_properties(struct drm_device *dev,
1521 unsigned int num_modes,
b7c914b3 1522 const char * const modes[])
f453ba04
DA		 1523{
1524 struct drm_property *tv_selector;
1525 struct drm_property *tv_subconnector;
2f763312 1526 unsigned int i;
f453ba04
DA		 1527
1528 if (dev->mode_config.tv_select_subconnector_property)
1529 return 0;
1530
1531 /*
1532 * Basic connector properties
1533 */
4a67d391 1534 tv_selector = drm_property_create_enum(dev, 0,
f453ba04 1535 "select subconnector",
4a67d391 1536 drm_tv_select_enum_list,
f453ba04 1537 ARRAY_SIZE(drm_tv_select_enum_list));
f453ba04
DA		 1538 dev->mode_config.tv_select_subconnector_property = tv_selector;
1539
1540 tv_subconnector =
4a67d391
SH		 1541 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1542 "subconnector",
1543 drm_tv_subconnector_enum_list,
f453ba04 1544 ARRAY_SIZE(drm_tv_subconnector_enum_list));
f453ba04
DA		 1545 dev->mode_config.tv_subconnector_property = tv_subconnector;
1546
1547 /*
1548 * Other, TV specific properties: margins & TV modes.
1549 */
1550 dev->mode_config.tv_left_margin_property =
d9bc3c02 1551 drm_property_create_range(dev, 0, "left margin", 0, 100);
f453ba04
DA		 1552
1553 dev->mode_config.tv_right_margin_property =
d9bc3c02 1554 drm_property_create_range(dev, 0, "right margin", 0, 100);
f453ba04
DA		 1555
1556 dev->mode_config.tv_top_margin_property =
d9bc3c02 1557 drm_property_create_range(dev, 0, "top margin", 0, 100);
f453ba04
DA		 1558
1559 dev->mode_config.tv_bottom_margin_property =
d9bc3c02 1560 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
f453ba04
DA		 1561
1562 dev->mode_config.tv_mode_property =
1563 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1564 "mode", num_modes);
1565 for (i = 0; i < num_modes; i++)
1566 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1567 i, modes[i]);
1568
b6b7902e 1569 dev->mode_config.tv_brightness_property =
d9bc3c02 1570 drm_property_create_range(dev, 0, "brightness", 0, 100);
b6b7902e
FJ		 1571
1572 dev->mode_config.tv_contrast_property =
d9bc3c02 1573 drm_property_create_range(dev, 0, "contrast", 0, 100);
b6b7902e
FJ		 1574
1575 dev->mode_config.tv_flicker_reduction_property =
d9bc3c02 1576 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
b6b7902e 1577
a75f0236 1578 dev->mode_config.tv_overscan_property =
d9bc3c02 1579 drm_property_create_range(dev, 0, "overscan", 0, 100);
a75f0236
FJ		 1580
1581 dev->mode_config.tv_saturation_property =
d9bc3c02 1582 drm_property_create_range(dev, 0, "saturation", 0, 100);
a75f0236
FJ		 1583
1584 dev->mode_config.tv_hue_property =
d9bc3c02 1585 drm_property_create_range(dev, 0, "hue", 0, 100);
a75f0236 1586
f453ba04
DA		 1587 return 0;
1588}
1589EXPORT_SYMBOL(drm_mode_create_tv_properties);
1590
1591/**
1592 * drm_mode_create_scaling_mode_property - create scaling mode property
1593 * @dev: DRM device
1594 *
1595 * Called by a driver the first time it's needed, must be attached to desired
1596 * connectors.
1597 */
1598int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1599{
1600 struct drm_property *scaling_mode;
f453ba04
DA		 1601
1602 if (dev->mode_config.scaling_mode_property)
1603 return 0;
1604
1605 scaling_mode =
4a67d391
SH		 1606 drm_property_create_enum(dev, 0, "scaling mode",
1607 drm_scaling_mode_enum_list,
f453ba04 1608 ARRAY_SIZE(drm_scaling_mode_enum_list));
f453ba04
DA		 1609
1610 dev->mode_config.scaling_mode_property = scaling_mode;
1611
1612 return 0;
1613}
1614EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1615
ff587e45
VK		 1616/**
1617 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1618 * @dev: DRM device
1619 *
1620 * Called by a driver the first time it's needed, must be attached to desired
1621 * connectors.
1622 *
1623 * Returns:
1a498633 1624 * Zero on success, negative errno on failure.
ff587e45
VK		 1625 */
1626int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1627{
1628 if (dev->mode_config.aspect_ratio_property)
1629 return 0;
1630
1631 dev->mode_config.aspect_ratio_property =
1632 drm_property_create_enum(dev, 0, "aspect ratio",
1633 drm_aspect_ratio_enum_list,
1634 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1635
1636 if (dev->mode_config.aspect_ratio_property == NULL)
1637 return -ENOMEM;
1638
1639 return 0;
1640}
1641EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1642
884840aa
JB		 1643/**
1644 * drm_mode_create_dirty_property - create dirty property
1645 * @dev: DRM device
1646 *
1647 * Called by a driver the first time it's needed, must be attached to desired
1648 * connectors.
1649 */
1650int drm_mode_create_dirty_info_property(struct drm_device *dev)
1651{
1652 struct drm_property *dirty_info;
884840aa
JB		 1653
1654 if (dev->mode_config.dirty_info_property)
1655 return 0;
1656
1657 dirty_info =
4a67d391 1658 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
884840aa 1659 "dirty",
4a67d391 1660 drm_dirty_info_enum_list,
884840aa 1661 ARRAY_SIZE(drm_dirty_info_enum_list));
884840aa
JB		 1662 dev->mode_config.dirty_info_property = dirty_info;
1663
1664 return 0;
1665}
1666EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1667
5bb2bbf5
DA		 1668/**
1669 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1670 * @dev: DRM device
1671 *
1672 * Create the the suggested x/y offset property for connectors.
1673 */
1674int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1675{
1676 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1677 return 0;
1678
1679 dev->mode_config.suggested_x_property =
1680 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1681
1682 dev->mode_config.suggested_y_property =
1683 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1684
1685 if (dev->mode_config.suggested_x_property == NULL ||
1686 dev->mode_config.suggested_y_property == NULL)
1687 return -ENOMEM;
1688 return 0;
1689}
1690EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1691
f453ba04
DA		 1692/**
1693 * drm_mode_getresources - get graphics configuration
065a50ed
DV		 1694 * @dev: drm device for the ioctl
1695 * @data: data pointer for the ioctl
1696 * @file_priv: drm file for the ioctl call
f453ba04 1697 *
f453ba04
DA		 1698 * Construct a set of configuration description structures and return
1699 * them to the user, including CRTC, connector and framebuffer configuration.
1700 *
1701 * Called by the user via ioctl.
1702 *
c8e32cc1 1703 * Returns:
1a498633 1704 * Zero on success, negative errno on failure.
f453ba04
DA		 1705 */
1706int drm_mode_getresources(struct drm_device *dev, void *data,
1707 struct drm_file *file_priv)
1708{
1709 struct drm_mode_card_res *card_res = data;
1710 struct list_head *lh;
1711 struct drm_framebuffer *fb;
1712 struct drm_connector *connector;
1713 struct drm_crtc *crtc;
1714 struct drm_encoder *encoder;
1715 int ret = 0;
1716 int connector_count = 0;
1717 int crtc_count = 0;
1718 int fb_count = 0;
1719 int encoder_count = 0;
9c7060f7 1720 int copied = 0;
f453ba04
DA		 1721 uint32_t __user *fb_id;
1722 uint32_t __user *crtc_id;
1723 uint32_t __user *connector_id;
1724 uint32_t __user *encoder_id;
f453ba04 1725
fb3b06c8
DA		 1726 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1727 return -EINVAL;
1728
f453ba04 1729
4b096ac1 1730 mutex_lock(&file_priv->fbs_lock);
f453ba04
DA		 1731 /*
1732 * For the non-control nodes we need to limit the list of resources
1733 * by IDs in the group list for this node
1734 */
1735 list_for_each(lh, &file_priv->fbs)
1736 fb_count++;
1737
4b096ac1
DV		 1738 /* handle this in 4 parts */
1739 /* FBs */
1740 if (card_res->count_fbs >= fb_count) {
1741 copied = 0;
1742 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1743 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1744 if (put_user(fb->base.id, fb_id + copied)) {
1745 mutex_unlock(&file_priv->fbs_lock);
1746 return -EFAULT;
1747 }
1748 copied++;
1749 }
1750 }
1751 card_res->count_fbs = fb_count;
1752 mutex_unlock(&file_priv->fbs_lock);
1753
fcf93f69
DV		 1754 /* mode_config.mutex protects the connector list against e.g. DP MST
1755 * connector hot-adding. CRTC/Plane lists are invariant. */
1756 mutex_lock(&dev->mode_config.mutex);
9c7060f7
DV		 1757 drm_for_each_crtc(crtc, dev)
1758 crtc_count++;
f453ba04 1759
9c7060f7
DV		 1760 drm_for_each_connector(connector, dev)
1761 connector_count++;
f453ba04 1762
9c7060f7
DV		 1763 drm_for_each_encoder(encoder, dev)
1764 encoder_count++;
f453ba04
DA		 1765
1766 card_res->max_height = dev->mode_config.max_height;
1767 card_res->min_height = dev->mode_config.min_height;
1768 card_res->max_width = dev->mode_config.max_width;
1769 card_res->min_width = dev->mode_config.min_width;
1770
f453ba04
DA		 1771 /* CRTCs */
1772 if (card_res->count_crtcs >= crtc_count) {
1773 copied = 0;
1774 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
9c7060f7
DV		 1775 drm_for_each_crtc(crtc, dev) {
1776 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1777 if (put_user(crtc->base.id, crtc_id + copied)) {
1778 ret = -EFAULT;
1779 goto out;
f453ba04 1780 }
9c7060f7 1781 copied++;
f453ba04
DA		 1782 }
1783 }
1784 card_res->count_crtcs = crtc_count;
1785
1786 /* Encoders */
1787 if (card_res->count_encoders >= encoder_count) {
1788 copied = 0;
1789 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
9c7060f7
DV		 1790 drm_for_each_encoder(encoder, dev) {
1791 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1792 encoder->name);
1793 if (put_user(encoder->base.id, encoder_id +
1794 copied)) {
1795 ret = -EFAULT;
1796 goto out;
f453ba04 1797 }
9c7060f7 1798 copied++;
f453ba04
DA		 1799 }
1800 }
1801 card_res->count_encoders = encoder_count;
1802
1803 /* Connectors */
1804 if (card_res->count_connectors >= connector_count) {
1805 copied = 0;
1806 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
9c7060f7
DV		 1807 drm_for_each_connector(connector, dev) {
1808 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1809 connector->base.id,
1810 connector->name);
1811 if (put_user(connector->base.id,
1812 connector_id + copied)) {
1813 ret = -EFAULT;
1814 goto out;
f453ba04 1815 }
9c7060f7 1816 copied++;
f453ba04
DA		 1817 }
1818 }
1819 card_res->count_connectors = connector_count;
1820
9440106b 1821 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
f453ba04
DA		 1822 card_res->count_connectors, card_res->count_encoders);
1823
1824out:
fcf93f69 1825 mutex_unlock(&dev->mode_config.mutex);
f453ba04
DA		 1826 return ret;
1827}
1828
1829/**
1830 * drm_mode_getcrtc - get CRTC configuration
065a50ed
DV		 1831 * @dev: drm device for the ioctl
1832 * @data: data pointer for the ioctl
1833 * @file_priv: drm file for the ioctl call
f453ba04 1834 *
f453ba04
DA		 1835 * Construct a CRTC configuration structure to return to the user.
1836 *
1837 * Called by the user via ioctl.
1838 *
c8e32cc1 1839 * Returns:
1a498633 1840 * Zero on success, negative errno on failure.
f453ba04
DA		 1841 */
1842int drm_mode_getcrtc(struct drm_device *dev,
1843 void *data, struct drm_file *file_priv)
1844{
1845 struct drm_mode_crtc *crtc_resp = data;
1846 struct drm_crtc *crtc;
f453ba04 1847
fb3b06c8
DA		 1848 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1849 return -EINVAL;
1850
a2b34e22 1851 crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
fcf93f69
DV		 1852 if (!crtc)
1853 return -ENOENT;
f453ba04 1854
fcf93f69 1855 drm_modeset_lock_crtc(crtc, crtc->primary);
f453ba04 1856 crtc_resp->gamma_size = crtc->gamma_size;
f4510a27
MR		 1857 if (crtc->primary->fb)
1858 crtc_resp->fb_id = crtc->primary->fb->base.id;
f453ba04
DA		 1859 else
1860 crtc_resp->fb_id = 0;
1861
31c946e8
DV		 1862 if (crtc->state) {
1863 crtc_resp->x = crtc->primary->state->src_x >> 16;
1864 crtc_resp->y = crtc->primary->state->src_y >> 16;
1865 if (crtc->state->enable) {
934a8a89 1866 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
31c946e8 1867 crtc_resp->mode_valid = 1;
f453ba04 1868
31c946e8
DV		 1869 } else {
1870 crtc_resp->mode_valid = 0;
1871 }
f453ba04 1872 } else {
31c946e8
DV		 1873 crtc_resp->x = crtc->x;
1874 crtc_resp->y = crtc->y;
1875 if (crtc->enabled) {
934a8a89 1876 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
31c946e8
DV		 1877 crtc_resp->mode_valid = 1;
1878
1879 } else {
1880 crtc_resp->mode_valid = 0;
1881 }
f453ba04 1882 }
fcf93f69 1883 drm_modeset_unlock_crtc(crtc);
f453ba04 1884
baf698b0 1885 return 0;
f453ba04
DA		 1886}
1887
61d8e328
DL		 1888static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1889 const struct drm_file *file_priv)
1890{
1891 /*
1892 * If user-space hasn't configured the driver to expose the stereo 3D
1893 * modes, don't expose them.
1894 */
1895 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1896 return false;
1897
1898 return true;
1899}
1900
abd69c55
DV		 1901static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1902{
1903 /* For atomic drivers only state objects are synchronously updated and
1904 * protected by modeset locks, so check those first. */
1905 if (connector->state)
1906 return connector->state->best_encoder;
1907 return connector->encoder;
1908}
1909
95cbf110 1910/* helper for getconnector and getproperties ioctls */
88a48e29 1911static int get_properties(struct drm_mode_object *obj, bool atomic,
95cbf110
RC		 1912 uint32_t __user *prop_ptr, uint64_t __user *prop_values,
1913 uint32_t *arg_count_props)
1914{
88a48e29
RC		 1915 int props_count;
1916 int i, ret, copied;
1917
1918 props_count = obj->properties->count;
1919 if (!atomic)
1920 props_count -= obj->properties->atomic_count;
95cbf110
RC		 1921
1922 if ((*arg_count_props >= props_count) && props_count) {
88a48e29 1923 for (i = 0, copied = 0; copied < props_count; i++) {
95cbf110
RC		 1924 struct drm_property *prop = obj->properties->properties[i];
1925 uint64_t val;
1926
88a48e29
RC		 1927 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
1928 continue;
1929
95cbf110
RC		 1930 ret = drm_object_property_get_value(obj, prop, &val);
1931 if (ret)
1932 return ret;
1933
1934 if (put_user(prop->base.id, prop_ptr + copied))
1935 return -EFAULT;
1936
1937 if (put_user(val, prop_values + copied))
1938 return -EFAULT;
1939
1940 copied++;
1941 }
1942 }
1943 *arg_count_props = props_count;
1944
1945 return 0;
1946}
1947
f453ba04
DA		 1948/**
1949 * drm_mode_getconnector - get connector configuration
065a50ed
DV		 1950 * @dev: drm device for the ioctl
1951 * @data: data pointer for the ioctl
1952 * @file_priv: drm file for the ioctl call
f453ba04 1953 *
f453ba04
DA		 1954 * Construct a connector configuration structure to return to the user.
1955 *
1956 * Called by the user via ioctl.
1957 *
c8e32cc1 1958 * Returns:
1a498633 1959 * Zero on success, negative errno on failure.
f453ba04
DA		 1960 */
1961int drm_mode_getconnector(struct drm_device *dev, void *data,
1962 struct drm_file *file_priv)
1963{
1964 struct drm_mode_get_connector *out_resp = data;
f453ba04 1965 struct drm_connector *connector;
abd69c55 1966 struct drm_encoder *encoder;
f453ba04
DA		 1967 struct drm_display_mode *mode;
1968 int mode_count = 0;
f453ba04
DA		 1969 int encoders_count = 0;
1970 int ret = 0;
1971 int copied = 0;
1972 int i;
1973 struct drm_mode_modeinfo u_mode;
1974 struct drm_mode_modeinfo __user *mode_ptr;
f453ba04
DA		 1975 uint32_t __user *encoder_ptr;
1976
fb3b06c8
DA		 1977 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1978 return -EINVAL;
1979
f453ba04
DA		 1980 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1981
9440106b 1982 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
f453ba04 1983
7b24056b 1984 mutex_lock(&dev->mode_config.mutex);
f453ba04 1985
a2b34e22
RC		 1986 connector = drm_connector_find(dev, out_resp->connector_id);
1987 if (!connector) {
f27657f2 1988 ret = -ENOENT;
04bdf441 1989 goto out_unlock;
f453ba04 1990 }
f453ba04 1991
01073b08
TR		 1992 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1993 if (connector->encoder_ids[i] != 0)
f453ba04 1994 encoders_count++;
f453ba04
DA		 1995
1996 if (out_resp->count_modes == 0) {
1997 connector->funcs->fill_modes(connector,
1998 dev->mode_config.max_width,
1999 dev->mode_config.max_height);
2000 }
2001
2002 /* delayed so we get modes regardless of pre-fill_modes state */
2003 list_for_each_entry(mode, &connector->modes, head)
61d8e328
DL		 2004 if (drm_mode_expose_to_userspace(mode, file_priv))
2005 mode_count++;
f453ba04
DA		 2006
2007 out_resp->connector_id = connector->base.id;
2008 out_resp->connector_type = connector->connector_type;
2009 out_resp->connector_type_id = connector->connector_type_id;
2010 out_resp->mm_width = connector->display_info.width_mm;
2011 out_resp->mm_height = connector->display_info.height_mm;
2012 out_resp->subpixel = connector->display_info.subpixel_order;
2013 out_resp->connection = connector->status;
2caa80e7
DV		 2014
2015 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
abd69c55
DV		 2016 encoder = drm_connector_get_encoder(connector);
2017 if (encoder)
2018 out_resp->encoder_id = encoder->base.id;
f453ba04
DA		 2019 else
2020 out_resp->encoder_id = 0;
2021
2022 /*
2023 * This ioctl is called twice, once to determine how much space is
2024 * needed, and the 2nd time to fill it.
2025 */
2026 if ((out_resp->count_modes >= mode_count) && mode_count) {
2027 copied = 0;
81f6c7f8 2028 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
f453ba04 2029 list_for_each_entry(mode, &connector->modes, head) {
61d8e328
DL		 2030 if (!drm_mode_expose_to_userspace(mode, file_priv))
2031 continue;
2032
934a8a89 2033 drm_mode_convert_to_umode(&u_mode, mode);
f453ba04
DA		 2034 if (copy_to_user(mode_ptr + copied,
2035 &u_mode, sizeof(u_mode))) {
2036 ret = -EFAULT;
2037 goto out;
2038 }
2039 copied++;
2040 }
2041 }
2042 out_resp->count_modes = mode_count;
2043
88a48e29 2044 ret = get_properties(&connector->base, file_priv->atomic,
95cbf110
RC		 2045 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2046 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2047 &out_resp->count_props);
2048 if (ret)
2049 goto out;
f453ba04
DA		 2050
2051 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2052 copied = 0;
81f6c7f8 2053 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
f453ba04
DA		 2054 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
2055 if (connector->encoder_ids[i] != 0) {
2056 if (put_user(connector->encoder_ids[i],
2057 encoder_ptr + copied)) {
2058 ret = -EFAULT;
2059 goto out;
2060 }
2061 copied++;
2062 }
2063 }
2064 }
2065 out_resp->count_encoders = encoders_count;
2066
2067out:
ccfc0865 2068 drm_modeset_unlock(&dev->mode_config.connection_mutex);
04bdf441
TR		 2069
2070out_unlock:
7b24056b
DV		 2071 mutex_unlock(&dev->mode_config.mutex);
2072
f453ba04
DA		 2073 return ret;
2074}
2075
abd69c55
DV		 2076static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
2077{
2078 struct drm_connector *connector;
2079 struct drm_device *dev = encoder->dev;
2080 bool uses_atomic = false;
2081
2082 /* For atomic drivers only state objects are synchronously updated and
2083 * protected by modeset locks, so check those first. */
6295d607 2084 drm_for_each_connector(connector, dev) {
abd69c55
DV		 2085 if (!connector->state)
2086 continue;
2087
2088 uses_atomic = true;
2089
2090 if (connector->state->best_encoder != encoder)
2091 continue;
2092
2093 return connector->state->crtc;
2094 }
2095
2096 /* Don't return stale data (e.g. pending async disable). */
2097 if (uses_atomic)
2098 return NULL;
2099
2100 return encoder->crtc;
2101}
2102
c8e32cc1
DV		 2103/**
2104 * drm_mode_getencoder - get encoder configuration
2105 * @dev: drm device for the ioctl
2106 * @data: data pointer for the ioctl
2107 * @file_priv: drm file for the ioctl call
2108 *
2109 * Construct a encoder configuration structure to return to the user.
2110 *
2111 * Called by the user via ioctl.
2112 *
2113 * Returns:
1a498633 2114 * Zero on success, negative errno on failure.
c8e32cc1 2115 */
f453ba04
DA		 2116int drm_mode_getencoder(struct drm_device *dev, void *data,
2117 struct drm_file *file_priv)
2118{
2119 struct drm_mode_get_encoder *enc_resp = data;
f453ba04 2120 struct drm_encoder *encoder;
abd69c55 2121 struct drm_crtc *crtc;
f453ba04 2122
fb3b06c8
DA		 2123 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2124 return -EINVAL;
2125
a2b34e22 2126 encoder = drm_encoder_find(dev, enc_resp->encoder_id);
fcf93f69
DV		 2127 if (!encoder)
2128 return -ENOENT;
f453ba04 2129
fcf93f69 2130 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
abd69c55
DV		 2131 crtc = drm_encoder_get_crtc(encoder);
2132 if (crtc)
2133 enc_resp->crtc_id = crtc->base.id;
f453ba04
DA		 2134 else
2135 enc_resp->crtc_id = 0;
fcf93f69
DV		 2136 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2137
f453ba04
DA		 2138 enc_resp->encoder_type = encoder->encoder_type;
2139 enc_resp->encoder_id = encoder->base.id;
2140 enc_resp->possible_crtcs = encoder->possible_crtcs;
2141 enc_resp->possible_clones = encoder->possible_clones;
2142
baf698b0 2143 return 0;
f453ba04
DA		 2144}
2145
8cf5c917 2146/**
c8e32cc1 2147 * drm_mode_getplane_res - enumerate all plane resources
8cf5c917
JB		 2148 * @dev: DRM device
2149 * @data: ioctl data
2150 * @file_priv: DRM file info
2151 *
c8e32cc1
DV		 2152 * Construct a list of plane ids to return to the user.
2153 *
2154 * Called by the user via ioctl.
2155 *
2156 * Returns:
1a498633 2157 * Zero on success, negative errno on failure.
8cf5c917
JB		 2158 */
2159int drm_mode_getplane_res(struct drm_device *dev, void *data,
c8e32cc1 2160 struct drm_file *file_priv)
8cf5c917
JB		 2161{
2162 struct drm_mode_get_plane_res *plane_resp = data;
2163 struct drm_mode_config *config;
2164 struct drm_plane *plane;
2165 uint32_t __user *plane_ptr;
fcf93f69 2166 int copied = 0;
681e7ec7 2167 unsigned num_planes;
8cf5c917
JB		 2168
2169 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2170 return -EINVAL;
2171
8cf5c917
JB		 2172 config = &dev->mode_config;
2173
681e7ec7
MR		 2174 if (file_priv->universal_planes)
2175 num_planes = config->num_total_plane;
2176 else
2177 num_planes = config->num_overlay_plane;
2178
8cf5c917
JB		 2179 /*
2180 * This ioctl is called twice, once to determine how much space is
2181 * needed, and the 2nd time to fill it.
2182 */
681e7ec7
MR		 2183 if (num_planes &&
2184 (plane_resp->count_planes >= num_planes)) {
81f6c7f8 2185 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
8cf5c917 2186
fcf93f69 2187 /* Plane lists are invariant, no locking needed. */
e4f62546 2188 drm_for_each_plane(plane, dev) {
681e7ec7
MR		 2189 /*
2190 * Unless userspace set the 'universal planes'
2191 * capability bit, only advertise overlays.
2192 */
2193 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
2194 !file_priv->universal_planes)
e27dde3e
MR		 2195 continue;
2196
fcf93f69
DV		 2197 if (put_user(plane->base.id, plane_ptr + copied))
2198 return -EFAULT;
8cf5c917
JB		 2199 copied++;
2200 }
2201 }
681e7ec7 2202 plane_resp->count_planes = num_planes;
8cf5c917 2203
fcf93f69 2204 return 0;
8cf5c917
JB		 2205}
2206
2207/**
c8e32cc1 2208 * drm_mode_getplane - get plane configuration
8cf5c917
JB		 2209 * @dev: DRM device
2210 * @data: ioctl data
2211 * @file_priv: DRM file info
2212 *
c8e32cc1
DV		 2213 * Construct a plane configuration structure to return to the user.
2214 *
2215 * Called by the user via ioctl.
2216 *
2217 * Returns:
1a498633 2218 * Zero on success, negative errno on failure.
8cf5c917
JB		 2219 */
2220int drm_mode_getplane(struct drm_device *dev, void *data,
c8e32cc1 2221 struct drm_file *file_priv)
8cf5c917
JB		 2222{
2223 struct drm_mode_get_plane *plane_resp = data;
8cf5c917
JB		 2224 struct drm_plane *plane;
2225 uint32_t __user *format_ptr;
8cf5c917
JB		 2226
2227 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2228 return -EINVAL;
2229
a2b34e22 2230 plane = drm_plane_find(dev, plane_resp->plane_id);
fcf93f69
DV		 2231 if (!plane)
2232 return -ENOENT;
8cf5c917 2233
fcf93f69 2234 drm_modeset_lock(&plane->mutex, NULL);
8cf5c917
JB		 2235 if (plane->crtc)
2236 plane_resp->crtc_id = plane->crtc->base.id;
2237 else
2238 plane_resp->crtc_id = 0;
2239
2240 if (plane->fb)
2241 plane_resp->fb_id = plane->fb->base.id;
2242 else
2243 plane_resp->fb_id = 0;
fcf93f69 2244 drm_modeset_unlock(&plane->mutex);
8cf5c917
JB		 2245
2246 plane_resp->plane_id = plane->base.id;
2247 plane_resp->possible_crtcs = plane->possible_crtcs;
778ad903 2248 plane_resp->gamma_size = 0;
8cf5c917
JB		 2249
2250 /*
2251 * This ioctl is called twice, once to determine how much space is
2252 * needed, and the 2nd time to fill it.
2253 */
2254 if (plane->format_count &&
2255 (plane_resp->count_format_types >= plane->format_count)) {
81f6c7f8 2256 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
8cf5c917
JB		 2257 if (copy_to_user(format_ptr,
2258 plane->format_types,
2259 sizeof(uint32_t) * plane->format_count)) {
fcf93f69 2260 return -EFAULT;
8cf5c917
JB		 2261 }
2262 }
2263 plane_resp->count_format_types = plane->format_count;
2264
baf698b0 2265 return 0;
8cf5c917
JB		 2266}
2267
ead8610d
LP		 2268/**
2269 * drm_plane_check_pixel_format - Check if the plane supports the pixel format
2270 * @plane: plane to check for format support
2271 * @format: the pixel format
2272 *
2273 * Returns:
2274 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL
2275 * otherwise.
2276 */
2277int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
2278{
2279 unsigned int i;
2280
2281 for (i = 0; i < plane->format_count; i++) {
2282 if (format == plane->format_types[i])
2283 return 0;
2284 }
2285
2286 return -EINVAL;
2287}
2288
b36552b3
MR		 2289/*
2290 * setplane_internal - setplane handler for internal callers
8cf5c917 2291 *
b36552b3
MR		 2292 * Note that we assume an extra reference has already been taken on fb. If the
2293 * update fails, this reference will be dropped before return; if it succeeds,
2294 * the previous framebuffer (if any) will be unreferenced instead.
c8e32cc1 2295 *
b36552b3 2296 * src_{x,y,w,h} are provided in 16.16 fixed point format
8cf5c917 2297 */
f2b50c11
DV		 2298static int __setplane_internal(struct drm_plane *plane,
2299 struct drm_crtc *crtc,
2300 struct drm_framebuffer *fb,
2301 int32_t crtc_x, int32_t crtc_y,
2302 uint32_t crtc_w, uint32_t crtc_h,
2303 /* src_{x,y,w,h} values are 16.16 fixed point */
2304 uint32_t src_x, uint32_t src_y,
2305 uint32_t src_w, uint32_t src_h)
8cf5c917 2306{
8cf5c917 2307 int ret = 0;
42ef8789 2308 unsigned int fb_width, fb_height;
8cf5c917 2309
8cf5c917 2310 /* No fb means shut it down */
b36552b3 2311 if (!fb) {
3d30a59b 2312 plane->old_fb = plane->fb;
731cce48
DV		 2313 ret = plane->funcs->disable_plane(plane);
2314 if (!ret) {
2315 plane->crtc = NULL;
2316 plane->fb = NULL;
2317 } else {
3d30a59b 2318 plane->old_fb = NULL;
731cce48 2319 }
8cf5c917
JB		 2320 goto out;
2321 }
2322
7f994f3f
MR		 2323 /* Check whether this plane is usable on this CRTC */
2324 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
2325 DRM_DEBUG_KMS("Invalid crtc for plane\n");
2326 ret = -EINVAL;
2327 goto out;
2328 }
2329
62443be6 2330 /* Check whether this plane supports the fb pixel format. */
ead8610d
LP		 2331 ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
2332 if (ret) {
6ba6d03e
VS		 2333 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2334 drm_get_format_name(fb->pixel_format));
62443be6
VS		 2335 goto out;
2336 }
2337
3968be94
MR		 2338 /* Give drivers some help against integer overflows */
2339 if (crtc_w > INT_MAX ||
2340 crtc_x > INT_MAX - (int32_t) crtc_w ||
2341 crtc_h > INT_MAX ||
2342 crtc_y > INT_MAX - (int32_t) crtc_h) {
2343 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2344 crtc_w, crtc_h, crtc_x, crtc_y);
2345 return -ERANGE;
2346 }
2347
2348
42ef8789
VS		 2349 fb_width = fb->width << 16;
2350 fb_height = fb->height << 16;
2351
2352 /* Make sure source coordinates are inside the fb. */
b36552b3
MR		 2353 if (src_w > fb_width ||
2354 src_x > fb_width - src_w ||
2355 src_h > fb_height ||
2356 src_y > fb_height - src_h) {
42ef8789
VS		 2357 DRM_DEBUG_KMS("Invalid source coordinates "
2358 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
b36552b3
MR		 2359 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
2360 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
2361 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
2362 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
42ef8789
VS		 2363 ret = -ENOSPC;
2364 goto out;
2365 }
2366
3d30a59b 2367 plane->old_fb = plane->fb;
8cf5c917 2368 ret = plane->funcs->update_plane(plane, crtc, fb,
b36552b3
MR		 2369 crtc_x, crtc_y, crtc_w, crtc_h,
2370 src_x, src_y, src_w, src_h);
8cf5c917
JB		 2371 if (!ret) {
2372 plane->crtc = crtc;
2373 plane->fb = fb;
35f8badc 2374 fb = NULL;
0fe27f06 2375 } else {
3d30a59b 2376 plane->old_fb = NULL;
8cf5c917
JB		 2377 }
2378
2379out:
6c2a7532
DV		 2380 if (fb)
2381 drm_framebuffer_unreference(fb);
3d30a59b
DV		 2382 if (plane->old_fb)
2383 drm_framebuffer_unreference(plane->old_fb);
2384 plane->old_fb = NULL;
8cf5c917
JB		 2385
2386 return ret;
f2b50c11 2387}
b36552b3 2388
f2b50c11
DV		 2389static int setplane_internal(struct drm_plane *plane,
2390 struct drm_crtc *crtc,
2391 struct drm_framebuffer *fb,
2392 int32_t crtc_x, int32_t crtc_y,
2393 uint32_t crtc_w, uint32_t crtc_h,
2394 /* src_{x,y,w,h} values are 16.16 fixed point */
2395 uint32_t src_x, uint32_t src_y,
2396 uint32_t src_w, uint32_t src_h)
2397{
2398 int ret;
2399
2400 drm_modeset_lock_all(plane->dev);
2401 ret = __setplane_internal(plane, crtc, fb,
2402 crtc_x, crtc_y, crtc_w, crtc_h,
2403 src_x, src_y, src_w, src_h);
2404 drm_modeset_unlock_all(plane->dev);
2405
2406 return ret;
b36552b3
MR		 2407}
2408
2409/**
2410 * drm_mode_setplane - configure a plane's configuration
2411 * @dev: DRM device
2412 * @data: ioctl data*
2413 * @file_priv: DRM file info
2414 *
2415 * Set plane configuration, including placement, fb, scaling, and other factors.
2416 * Or pass a NULL fb to disable (planes may be disabled without providing a
2417 * valid crtc).
2418 *
2419 * Returns:
1a498633 2420 * Zero on success, negative errno on failure.
b36552b3
MR		 2421 */
2422int drm_mode_setplane(struct drm_device *dev, void *data,
2423 struct drm_file *file_priv)
2424{
2425 struct drm_mode_set_plane *plane_req = data;
b36552b3
MR		 2426 struct drm_plane *plane;
2427 struct drm_crtc *crtc = NULL;
2428 struct drm_framebuffer *fb = NULL;
2429
2430 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2431 return -EINVAL;
2432
b36552b3
MR		 2433 /*
2434 * First, find the plane, crtc, and fb objects. If not available,
2435 * we don't bother to call the driver.
2436 */
933f622f
RC		 2437 plane = drm_plane_find(dev, plane_req->plane_id);
2438 if (!plane) {
b36552b3
MR		 2439 DRM_DEBUG_KMS("Unknown plane ID %d\n",
2440 plane_req->plane_id);
2441 return -ENOENT;
2442 }
b36552b3
MR		 2443
2444 if (plane_req->fb_id) {
2445 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
2446 if (!fb) {
2447 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
2448 plane_req->fb_id);
2449 return -ENOENT;
2450 }
2451
933f622f
RC		 2452 crtc = drm_crtc_find(dev, plane_req->crtc_id);
2453 if (!crtc) {
b36552b3
MR		 2454 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
2455 plane_req->crtc_id);
2456 return -ENOENT;
2457 }
b36552b3
MR		 2458 }
2459
161d0dc1
MR		 2460 /*
2461 * setplane_internal will take care of deref'ing either the old or new
2462 * framebuffer depending on success.
2463 */
17cfd91f 2464 return setplane_internal(plane, crtc, fb,
b36552b3
MR		 2465 plane_req->crtc_x, plane_req->crtc_y,
2466 plane_req->crtc_w, plane_req->crtc_h,
2467 plane_req->src_x, plane_req->src_y,
2468 plane_req->src_w, plane_req->src_h);
8cf5c917
JB		 2469}
2470
2d13b679
DV		 2471/**
2472 * drm_mode_set_config_internal - helper to call ->set_config
2473 * @set: modeset config to set
2474 *
2475 * This is a little helper to wrap internal calls to the ->set_config driver
2476 * interface. The only thing it adds is correct refcounting dance.
4dfd909f 2477 *
c8e32cc1 2478 * Returns:
1a498633 2479 * Zero on success, negative errno on failure.
2d13b679
DV		 2480 */
2481int drm_mode_set_config_internal(struct drm_mode_set *set)
2482{
2483 struct drm_crtc *crtc = set->crtc;
5cef29aa
DV		 2484 struct drm_framebuffer *fb;
2485 struct drm_crtc *tmp;
b0d12325
DV		 2486 int ret;
2487
5cef29aa
DV		 2488 /*
2489 * NOTE: ->set_config can also disable other crtcs (if we steal all
2490 * connectors from it), hence we need to refcount the fbs across all
2491 * crtcs. Atomic modeset will have saner semantics ...
2492 */
e4f62546 2493 drm_for_each_crtc(tmp, crtc->dev)
3d30a59b 2494 tmp->primary->old_fb = tmp->primary->fb;
5cef29aa 2495
b0d12325 2496 fb = set->fb;
2d13b679 2497
b0d12325
DV		 2498 ret = crtc->funcs->set_config(set);
2499 if (ret == 0) {
e13161af 2500 crtc->primary->crtc = crtc;
0fe27f06 2501 crtc->primary->fb = fb;
5cef29aa 2502 }
cc85e121 2503
e4f62546 2504 drm_for_each_crtc(tmp, crtc->dev) {
f4510a27
MR		 2505 if (tmp->primary->fb)
2506 drm_framebuffer_reference(tmp->primary->fb);
3d30a59b
DV		 2507 if (tmp->primary->old_fb)
2508 drm_framebuffer_unreference(tmp->primary->old_fb);
2509 tmp->primary->old_fb = NULL;
b0d12325
DV		 2510 }
2511
2512 return ret;
2d13b679
DV		 2513}
2514EXPORT_SYMBOL(drm_mode_set_config_internal);
2515
ecb7e16b
GP		 2516/**
2517 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
2518 * @mode: mode to query
2519 * @hdisplay: hdisplay value to fill in
2520 * @vdisplay: vdisplay value to fill in
2521 *
2522 * The vdisplay value will be doubled if the specified mode is a stereo mode of
2523 * the appropriate layout.
2524 */
2525void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
2526 int *hdisplay, int *vdisplay)
2527{
2528 struct drm_display_mode adjusted;
2529
2530 drm_mode_copy(&adjusted, mode);
2531 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
2532 *hdisplay = adjusted.crtc_hdisplay;
2533 *vdisplay = adjusted.crtc_vdisplay;
2534}
2535EXPORT_SYMBOL(drm_crtc_get_hv_timing);
2536
af93629d
MR		 2537/**
2538 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
2539 * CRTC viewport
2540 * @crtc: CRTC that framebuffer will be displayed on
2541 * @x: x panning
2542 * @y: y panning
2543 * @mode: mode that framebuffer will be displayed under
2544 * @fb: framebuffer to check size of
c11e9283 2545 */
af93629d
MR		 2546int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2547 int x, int y,
2548 const struct drm_display_mode *mode,
2549 const struct drm_framebuffer *fb)
c11e9283
DL		 2550
2551{
2552 int hdisplay, vdisplay;
2553
ecb7e16b 2554 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
a0c1bbb0 2555
c11e9283
DL		 2556 if (crtc->invert_dimensions)
2557 swap(hdisplay, vdisplay);
2558
2559 if (hdisplay > fb->width ||
2560 vdisplay > fb->height ||
2561 x > fb->width - hdisplay ||
2562 y > fb->height - vdisplay) {
2563 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
2564 fb->width, fb->height, hdisplay, vdisplay, x, y,
2565 crtc->invert_dimensions ? " (inverted)" : "");
2566 return -ENOSPC;
2567 }
2568
2569 return 0;
2570}
af93629d 2571EXPORT_SYMBOL(drm_crtc_check_viewport);
c11e9283 2572
f453ba04
DA		 2573/**
2574 * drm_mode_setcrtc - set CRTC configuration
065a50ed
DV		 2575 * @dev: drm device for the ioctl
2576 * @data: data pointer for the ioctl
2577 * @file_priv: drm file for the ioctl call
f453ba04 2578 *
f453ba04
DA		 2579 * Build a new CRTC configuration based on user request.
2580 *
2581 * Called by the user via ioctl.
2582 *
c8e32cc1 2583 * Returns:
1a498633 2584 * Zero on success, negative errno on failure.
f453ba04
DA		 2585 */
2586int drm_mode_setcrtc(struct drm_device *dev, void *data,
2587 struct drm_file *file_priv)
2588{
2589 struct drm_mode_config *config = &dev->mode_config;
2590 struct drm_mode_crtc *crtc_req = data;
6653cc8d 2591 struct drm_crtc *crtc;
f453ba04
DA		 2592 struct drm_connector **connector_set = NULL, *connector;
2593 struct drm_framebuffer *fb = NULL;
2594 struct drm_display_mode *mode = NULL;
2595 struct drm_mode_set set;
2596 uint32_t __user *set_connectors_ptr;
4a1b0714 2597 int ret;
f453ba04
DA		 2598 int i;
2599
fb3b06c8
DA		 2600 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2601 return -EINVAL;
2602
01447e9f
ZJ		 2603 /*
2604 * Universal plane src offsets are only 16.16, prevent havoc for
2605 * drivers using universal plane code internally.
2606 */
2607 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
1d97e915
VS		 2608 return -ERANGE;
2609
84849903 2610 drm_modeset_lock_all(dev);
a2b34e22
RC		 2611 crtc = drm_crtc_find(dev, crtc_req->crtc_id);
2612 if (!crtc) {
58367ed6 2613 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
f27657f2 2614 ret = -ENOENT;
f453ba04
DA		 2615 goto out;
2616 }
9440106b 2617 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
f453ba04
DA		 2618
2619 if (crtc_req->mode_valid) {
2620 /* If we have a mode we need a framebuffer. */
2621 /* If we pass -1, set the mode with the currently bound fb */
2622 if (crtc_req->fb_id == -1) {
f4510a27 2623 if (!crtc->primary->fb) {
6653cc8d
VS		 2624 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2625 ret = -EINVAL;
2626 goto out;
f453ba04 2627 }
f4510a27 2628 fb = crtc->primary->fb;
b0d12325
DV		 2629 /* Make refcounting symmetric with the lookup path. */
2630 drm_framebuffer_reference(fb);
f453ba04 2631 } else {
786b99ed
DV		 2632 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2633 if (!fb) {
58367ed6
ZY		 2634 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2635 crtc_req->fb_id);
37c4e705 2636 ret = -ENOENT;
f453ba04
DA		 2637 goto out;
2638 }
f453ba04
DA		 2639 }
2640
2641 mode = drm_mode_create(dev);
ee34ab5b
VS		 2642 if (!mode) {
2643 ret = -ENOMEM;
2644 goto out;
2645 }
2646
934a8a89 2647 ret = drm_mode_convert_umode(mode, &crtc_req->mode);
90367bf6
VS		 2648 if (ret) {
2649 DRM_DEBUG_KMS("Invalid mode\n");
2650 goto out;
2651 }
2652
f453ba04 2653 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
5f61bb42 2654
7eb5f302
LP		 2655 /*
2656 * Check whether the primary plane supports the fb pixel format.
2657 * Drivers not implementing the universal planes API use a
2658 * default formats list provided by the DRM core which doesn't
2659 * match real hardware capabilities. Skip the check in that
2660 * case.
2661 */
2662 if (!crtc->primary->format_default) {
2663 ret = drm_plane_check_pixel_format(crtc->primary,
2664 fb->pixel_format);
2665 if (ret) {
2666 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2667 drm_get_format_name(fb->pixel_format));
2668 goto out;
2669 }
2670 }
2671
c11e9283
DL		 2672 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2673 mode, fb);
2674 if (ret)
5f61bb42 2675 goto out;
c11e9283 2676
f453ba04
DA		 2677 }
2678
2679 if (crtc_req->count_connectors == 0 && mode) {
58367ed6 2680 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
f453ba04
DA		 2681 ret = -EINVAL;
2682 goto out;
2683 }
2684
7781de74 2685 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
58367ed6 2686 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
f453ba04
DA		 2687 crtc_req->count_connectors);
2688 ret = -EINVAL;
2689 goto out;
2690 }
2691
2692 if (crtc_req->count_connectors > 0) {
2693 u32 out_id;
2694
2695 /* Avoid unbounded kernel memory allocation */
2696 if (crtc_req->count_connectors > config->num_connector) {
2697 ret = -EINVAL;
2698 goto out;
2699 }
2700
2f6c5389
TR		 2701 connector_set = kmalloc_array(crtc_req->count_connectors,
2702 sizeof(struct drm_connector *),
2703 GFP_KERNEL);
f453ba04
DA		 2704 if (!connector_set) {
2705 ret = -ENOMEM;
2706 goto out;
2707 }
2708
2709 for (i = 0; i < crtc_req->count_connectors; i++) {
81f6c7f8 2710 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
f453ba04
DA		 2711 if (get_user(out_id, &set_connectors_ptr[i])) {
2712 ret = -EFAULT;
2713 goto out;
2714 }
2715
a2b34e22
RC		 2716 connector = drm_connector_find(dev, out_id);
2717 if (!connector) {
58367ed6
ZY		 2718 DRM_DEBUG_KMS("Connector id %d unknown\n",
2719 out_id);
f27657f2 2720 ret = -ENOENT;
f453ba04
DA		 2721 goto out;
2722 }
9440106b
JG		 2723 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2724 connector->base.id,
25933820 2725 connector->name);
f453ba04
DA		 2726
2727 connector_set[i] = connector;
2728 }
2729 }
2730
2731 set.crtc = crtc;
2732 set.x = crtc_req->x;
2733 set.y = crtc_req->y;
2734 set.mode = mode;
2735 set.connectors = connector_set;
2736 set.num_connectors = crtc_req->count_connectors;
5ef5f72f 2737 set.fb = fb;
2d13b679 2738 ret = drm_mode_set_config_internal(&set);
f453ba04
DA		 2739
2740out:
b0d12325
DV		 2741 if (fb)
2742 drm_framebuffer_unreference(fb);
2743
f453ba04 2744 kfree(connector_set);
ee34ab5b 2745 drm_mode_destroy(dev, mode);
84849903 2746 drm_modeset_unlock_all(dev);
f453ba04
DA		 2747 return ret;
2748}
2749
161d0dc1
MR		 2750/**
2751 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a
2752 * universal plane handler call
2753 * @crtc: crtc to update cursor for
2754 * @req: data pointer for the ioctl
2755 * @file_priv: drm file for the ioctl call
2756 *
2757 * Legacy cursor ioctl's work directly with driver buffer handles. To
2758 * translate legacy ioctl calls into universal plane handler calls, we need to
2759 * wrap the native buffer handle in a drm_framebuffer.
2760 *
2761 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB
2762 * buffer with a pitch of 4*width; the universal plane interface should be used
2763 * directly in cases where the hardware can support other buffer settings and
2764 * userspace wants to make use of these capabilities.
2765 *
2766 * Returns:
1a498633 2767 * Zero on success, negative errno on failure.
161d0dc1
MR		 2768 */
2769static int drm_mode_cursor_universal(struct drm_crtc *crtc,
2770 struct drm_mode_cursor2 *req,
2771 struct drm_file *file_priv)
2772{
2773 struct drm_device *dev = crtc->dev;
2774 struct drm_framebuffer *fb = NULL;
2775 struct drm_mode_fb_cmd2 fbreq = {
2776 .width = req->width,
2777 .height = req->height,
2778 .pixel_format = DRM_FORMAT_ARGB8888,
2779 .pitches = { req->width * 4 },
2780 .handles = { req->handle },
2781 };
2782 int32_t crtc_x, crtc_y;
2783 uint32_t crtc_w = 0, crtc_h = 0;
2784 uint32_t src_w = 0, src_h = 0;
2785 int ret = 0;
2786
2787 BUG_ON(!crtc->cursor);
f2b50c11 2788 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
161d0dc1
MR		 2789
2790 /*
2791 * Obtain fb we'll be using (either new or existing) and take an extra
2792 * reference to it if fb != null. setplane will take care of dropping
2793 * the reference if the plane update fails.
2794 */
2795 if (req->flags & DRM_MODE_CURSOR_BO) {
2796 if (req->handle) {
9a6f5130 2797 fb = internal_framebuffer_create(dev, &fbreq, file_priv);
161d0dc1
MR		 2798 if (IS_ERR(fb)) {
2799 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
2800 return PTR_ERR(fb);
2801 }
161d0dc1
MR		 2802 } else {
2803 fb = NULL;
2804 }
2805 } else {
161d0dc1
MR		 2806 fb = crtc->cursor->fb;
2807 if (fb)
2808 drm_framebuffer_reference(fb);
161d0dc1
MR		 2809 }
2810
2811 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2812 crtc_x = req->x;
2813 crtc_y = req->y;
2814 } else {
2815 crtc_x = crtc->cursor_x;
2816 crtc_y = crtc->cursor_y;
2817 }
2818
2819 if (fb) {
2820 crtc_w = fb->width;
2821 crtc_h = fb->height;
2822 src_w = fb->width << 16;
2823 src_h = fb->height << 16;
2824 }
2825
2826 /*
2827 * setplane_internal will take care of deref'ing either the old or new
2828 * framebuffer depending on success.
2829 */
f2b50c11 2830 ret = __setplane_internal(crtc->cursor, crtc, fb,
161d0dc1
MR		 2831 crtc_x, crtc_y, crtc_w, crtc_h,
2832 0, 0, src_w, src_h);
2833
2834 /* Update successful; save new cursor position, if necessary */
2835 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
2836 crtc->cursor_x = req->x;
2837 crtc->cursor_y = req->y;
2838 }
2839
2840 return ret;
2841}
2842
4c813d4d
DA		 2843static int drm_mode_cursor_common(struct drm_device *dev,
2844 struct drm_mode_cursor2 *req,
2845 struct drm_file *file_priv)
f453ba04 2846{
f453ba04
DA		 2847 struct drm_crtc *crtc;
2848 int ret = 0;
2849
fb3b06c8
DA		 2850 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2851 return -EINVAL;
2852
7c4eaca4 2853 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
f453ba04 2854 return -EINVAL;
f453ba04 2855
a2b34e22
RC		 2856 crtc = drm_crtc_find(dev, req->crtc_id);
2857 if (!crtc) {
58367ed6 2858 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
f27657f2 2859 return -ENOENT;
f453ba04 2860 }
f453ba04 2861
161d0dc1
MR		 2862 /*
2863 * If this crtc has a universal cursor plane, call that plane's update
2864 * handler rather than using legacy cursor handlers.
2865 */
4d02e2de 2866 drm_modeset_lock_crtc(crtc, crtc->cursor);
f2b50c11
DV		 2867 if (crtc->cursor) {
2868 ret = drm_mode_cursor_universal(crtc, req, file_priv);
2869 goto out;
2870 }
2871
f453ba04 2872 if (req->flags & DRM_MODE_CURSOR_BO) {
4c813d4d 2873 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
f453ba04
DA		 2874 ret = -ENXIO;
2875 goto out;
2876 }
2877 /* Turns off the cursor if handle is 0 */
4c813d4d
DA		 2878 if (crtc->funcs->cursor_set2)
2879 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
2880 req->width, req->height, req->hot_x, req->hot_y);
2881 else
2882 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2883 req->width, req->height);
f453ba04
DA		 2884 }
2885
2886 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2887 if (crtc->funcs->cursor_move) {
2888 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2889 } else {
f453ba04
DA		 2890 ret = -EFAULT;
2891 goto out;
2892 }
2893 }
2894out:
d059f652 2895 drm_modeset_unlock_crtc(crtc);
dac35663 2896
f453ba04 2897 return ret;
4c813d4d
DA		 2898
2899}
c8e32cc1
DV		 2900
2901
2902/**
2903 * drm_mode_cursor_ioctl - set CRTC's cursor configuration
2904 * @dev: drm device for the ioctl
2905 * @data: data pointer for the ioctl
2906 * @file_priv: drm file for the ioctl call
2907 *
2908 * Set the cursor configuration based on user request.
2909 *
2910 * Called by the user via ioctl.
2911 *
2912 * Returns:
1a498633 2913 * Zero on success, negative errno on failure.
c8e32cc1 2914 */
4c813d4d 2915int drm_mode_cursor_ioctl(struct drm_device *dev,
c8e32cc1 2916 void *data, struct drm_file *file_priv)
4c813d4d
DA		 2917{
2918 struct drm_mode_cursor *req = data;
2919 struct drm_mode_cursor2 new_req;
2920
2921 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
2922 new_req.hot_x = new_req.hot_y = 0;
2923
2924 return drm_mode_cursor_common(dev, &new_req, file_priv);
2925}
2926
c8e32cc1
DV		 2927/**
2928 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
2929 * @dev: drm device for the ioctl
2930 * @data: data pointer for the ioctl
2931 * @file_priv: drm file for the ioctl call
2932 *
2933 * Set the cursor configuration based on user request. This implements the 2nd
2934 * version of the cursor ioctl, which allows userspace to additionally specify
2935 * the hotspot of the pointer.
2936 *
2937 * Called by the user via ioctl.
2938 *
2939 * Returns:
1a498633 2940 * Zero on success, negative errno on failure.
c8e32cc1 2941 */
4c813d4d
DA		 2942int drm_mode_cursor2_ioctl(struct drm_device *dev,
2943 void *data, struct drm_file *file_priv)
2944{
2945 struct drm_mode_cursor2 *req = data;
4dfd909f 2946
4c813d4d 2947 return drm_mode_cursor_common(dev, req, file_priv);
f453ba04
DA		 2948}
2949
c8e32cc1
DV		 2950/**
2951 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
2952 * @bpp: bits per pixels
2953 * @depth: bit depth per pixel
2954 *
2955 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
2956 * Useful in fbdev emulation code, since that deals in those values.
2957 */
308e5bcb
JB		 2958uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2959{
2960 uint32_t fmt;
2961
2962 switch (bpp) {
2963 case 8:
d84f031b 2964 fmt = DRM_FORMAT_C8;
308e5bcb
JB		 2965 break;
2966 case 16:
2967 if (depth == 15)
04b3924d 2968 fmt = DRM_FORMAT_XRGB1555;
308e5bcb 2969 else
04b3924d 2970 fmt = DRM_FORMAT_RGB565;
308e5bcb
JB		 2971 break;
2972 case 24:
04b3924d 2973 fmt = DRM_FORMAT_RGB888;
308e5bcb
JB		 2974 break;
2975 case 32:
2976 if (depth == 24)
04b3924d 2977 fmt = DRM_FORMAT_XRGB8888;
308e5bcb 2978 else if (depth == 30)
04b3924d 2979 fmt = DRM_FORMAT_XRGB2101010;
308e5bcb 2980 else
04b3924d 2981 fmt = DRM_FORMAT_ARGB8888;
308e5bcb
JB		 2982 break;
2983 default:
04b3924d
VS		 2984 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
2985 fmt = DRM_FORMAT_XRGB8888;
308e5bcb
JB		 2986 break;
2987 }
2988
2989 return fmt;
2990}
2991EXPORT_SYMBOL(drm_mode_legacy_fb_format);
2992
f453ba04
DA		 2993/**
2994 * drm_mode_addfb - add an FB to the graphics configuration
065a50ed
DV		 2995 * @dev: drm device for the ioctl
2996 * @data: data pointer for the ioctl
2997 * @file_priv: drm file for the ioctl call
f453ba04 2998 *
c8e32cc1 2999 * Add a new FB to the specified CRTC, given a user request. This is the
209f5527 3000 * original addfb ioctl which only supported RGB formats.
f453ba04
DA		 3001 *
3002 * Called by the user via ioctl.
3003 *
c8e32cc1 3004 * Returns:
1a498633 3005 * Zero on success, negative errno on failure.
f453ba04
DA		 3006 */
3007int drm_mode_addfb(struct drm_device *dev,
3008 void *data, struct drm_file *file_priv)
3009{
308e5bcb
JB		 3010 struct drm_mode_fb_cmd *or = data;
3011 struct drm_mode_fb_cmd2 r = {};
228f2cb3 3012 int ret;
308e5bcb 3013
228f2cb3 3014 /* convert to new format and call new ioctl */
308e5bcb
JB		 3015 r.fb_id = or->fb_id;
3016 r.width = or->width;
3017 r.height = or->height;
3018 r.pitches[0] = or->pitch;
3019 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
3020 r.handles[0] = or->handle;
3021
228f2cb3
CE		 3022 ret = drm_mode_addfb2(dev, &r, file_priv);
3023 if (ret)
3024 return ret;
308e5bcb 3025
228f2cb3 3026 or->fb_id = r.fb_id;
4b096ac1 3027
baf698b0 3028 return 0;
308e5bcb
JB		 3029}
3030
cff91b62 3031static int format_check(const struct drm_mode_fb_cmd2 *r)
935b5977
VS		 3032{
3033 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
3034
3035 switch (format) {
3036 case DRM_FORMAT_C8:
3037 case DRM_FORMAT_RGB332:
3038 case DRM_FORMAT_BGR233:
3039 case DRM_FORMAT_XRGB4444:
3040 case DRM_FORMAT_XBGR4444:
3041 case DRM_FORMAT_RGBX4444:
3042 case DRM_FORMAT_BGRX4444:
3043 case DRM_FORMAT_ARGB4444:
3044 case DRM_FORMAT_ABGR4444:
3045 case DRM_FORMAT_RGBA4444:
3046 case DRM_FORMAT_BGRA4444:
3047 case DRM_FORMAT_XRGB1555:
3048 case DRM_FORMAT_XBGR1555:
3049 case DRM_FORMAT_RGBX5551:
3050 case DRM_FORMAT_BGRX5551:
3051 case DRM_FORMAT_ARGB1555:
3052 case DRM_FORMAT_ABGR1555:
3053 case DRM_FORMAT_RGBA5551:
3054 case DRM_FORMAT_BGRA5551:
3055 case DRM_FORMAT_RGB565:
3056 case DRM_FORMAT_BGR565:
3057 case DRM_FORMAT_RGB888:
3058 case DRM_FORMAT_BGR888:
3059 case DRM_FORMAT_XRGB8888:
3060 case DRM_FORMAT_XBGR8888:
3061 case DRM_FORMAT_RGBX8888:
3062 case DRM_FORMAT_BGRX8888:
3063 case DRM_FORMAT_ARGB8888:
3064 case DRM_FORMAT_ABGR8888:
3065 case DRM_FORMAT_RGBA8888:
3066 case DRM_FORMAT_BGRA8888:
3067 case DRM_FORMAT_XRGB2101010:
3068 case DRM_FORMAT_XBGR2101010:
3069 case DRM_FORMAT_RGBX1010102:
3070 case DRM_FORMAT_BGRX1010102:
3071 case DRM_FORMAT_ARGB2101010:
3072 case DRM_FORMAT_ABGR2101010:
3073 case DRM_FORMAT_RGBA1010102:
3074 case DRM_FORMAT_BGRA1010102:
3075 case DRM_FORMAT_YUYV:
3076 case DRM_FORMAT_YVYU:
3077 case DRM_FORMAT_UYVY:
3078 case DRM_FORMAT_VYUY:
3079 case DRM_FORMAT_AYUV:
3080 case DRM_FORMAT_NV12:
3081 case DRM_FORMAT_NV21:
3082 case DRM_FORMAT_NV16:
3083 case DRM_FORMAT_NV61:
ba623f6a
LP		 3084 case DRM_FORMAT_NV24:
3085 case DRM_FORMAT_NV42:
935b5977
VS		 3086 case DRM_FORMAT_YUV410:
3087 case DRM_FORMAT_YVU410:
3088 case DRM_FORMAT_YUV411:
3089 case DRM_FORMAT_YVU411:
3090 case DRM_FORMAT_YUV420:
3091 case DRM_FORMAT_YVU420:
3092 case DRM_FORMAT_YUV422:
3093 case DRM_FORMAT_YVU422:
3094 case DRM_FORMAT_YUV444:
3095 case DRM_FORMAT_YVU444:
3096 return 0;
3097 default:
23c453a4
VS		 3098 DRM_DEBUG_KMS("invalid pixel format %s\n",
3099 drm_get_format_name(r->pixel_format));
935b5977
VS		 3100 return -EINVAL;
3101 }
3102}
3103
cff91b62 3104static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
d1b45d5f
VS		 3105{
3106 int ret, hsub, vsub, num_planes, i;
3107
3108 ret = format_check(r);
3109 if (ret) {
6ba6d03e
VS		 3110 DRM_DEBUG_KMS("bad framebuffer format %s\n",
3111 drm_get_format_name(r->pixel_format));
d1b45d5f
VS		 3112 return ret;
3113 }
3114
3115 hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
3116 vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
3117 num_planes = drm_format_num_planes(r->pixel_format);
3118
3119 if (r->width == 0 || r->width % hsub) {
209f5527 3120 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
d1b45d5f
VS		 3121 return -EINVAL;
3122 }
3123
3124 if (r->height == 0 || r->height % vsub) {
1aa1b11c 3125 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
d1b45d5f
VS		 3126 return -EINVAL;
3127 }
3128
3129 for (i = 0; i < num_planes; i++) {
3130 unsigned int width = r->width / (i != 0 ? hsub : 1);
b180b5d1
VS		 3131 unsigned int height = r->height / (i != 0 ? vsub : 1);
3132 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
d1b45d5f
VS		 3133
3134 if (!r->handles[i]) {
1aa1b11c 3135 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
d1b45d5f
VS		 3136 return -EINVAL;
3137 }
3138
b180b5d1
VS		 3139 if ((uint64_t) width * cpp > UINT_MAX)
3140 return -ERANGE;
3141
3142 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
3143 return -ERANGE;
3144
3145 if (r->pitches[i] < width * cpp) {
1aa1b11c 3146 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
d1b45d5f
VS		 3147 return -EINVAL;
3148 }
e3eb3250
RC		 3149
3150 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
3151 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
3152 r->modifier[i], i);
3153 return -EINVAL;
3154 }
570655b0
RC		 3155
3156 /* modifier specific checks: */
3157 switch (r->modifier[i]) {
3158 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
3159 /* NOTE: the pitch restriction may be lifted later if it turns
3160 * out that no hw has this restriction:
3161 */
3162 if (r->pixel_format != DRM_FORMAT_NV12 ||
3163 width % 128 || height % 32 ||
3164 r->pitches[i] % 128) {
3165 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
3166 return -EINVAL;
3167 }
3168 break;
3169
3170 default:
3171 break;
3172 }
d1b45d5f
VS		 3173 }
3174
bbe16a40
DV		 3175 for (i = num_planes; i < 4; i++) {
3176 if (r->modifier[i]) {
3177 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
3178 return -EINVAL;
3179 }
3180
3181 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
3182 if (!(r->flags & DRM_MODE_FB_MODIFIERS))
3183 continue;
3184
3185 if (r->handles[i]) {
3186 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
3187 return -EINVAL;
3188 }
3189
3190 if (r->pitches[i]) {
3191 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
3192 return -EINVAL;
3193 }
3194
3195 if (r->offsets[i]) {
3196 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
3197 return -EINVAL;
3198 }
3199 }
3200
d1b45d5f
VS		 3201 return 0;
3202}
3203
9a6f5130
CW		 3204static struct drm_framebuffer *
3205internal_framebuffer_create(struct drm_device *dev,
3206 struct drm_mode_fb_cmd2 *r,
3207 struct drm_file *file_priv)
308e5bcb 3208{
f453ba04
DA		 3209 struct drm_mode_config *config = &dev->mode_config;
3210 struct drm_framebuffer *fb;
4a1b0714 3211 int ret;
f453ba04 3212
e3eb3250 3213 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
e3cc3520 3214 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
c394c2b0 3215 return ERR_PTR(-EINVAL);
e3cc3520
VS		 3216 }
3217
f453ba04 3218 if ((config->min_width > r->width) || (r->width > config->max_width)) {
1aa1b11c 3219 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
8cf5c917 3220 r->width, config->min_width, config->max_width);
c394c2b0 3221 return ERR_PTR(-EINVAL);
f453ba04
DA		 3222 }
3223 if ((config->min_height > r->height) || (r->height > config->max_height)) {
1aa1b11c 3224 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
8cf5c917 3225 r->height, config->min_height, config->max_height);
c394c2b0 3226 return ERR_PTR(-EINVAL);
f453ba04
DA		 3227 }
3228
e3eb3250
RC		 3229 if (r->flags & DRM_MODE_FB_MODIFIERS &&
3230 !dev->mode_config.allow_fb_modifiers) {
3231 DRM_DEBUG_KMS("driver does not support fb modifiers\n");
3232 return ERR_PTR(-EINVAL);
3233 }
3234
d1b45d5f
VS		 3235 ret = framebuffer_check(r);
3236 if (ret)
c394c2b0 3237 return ERR_PTR(ret);
935b5977 3238
f453ba04 3239 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
cce13ff7 3240 if (IS_ERR(fb)) {
1aa1b11c 3241 DRM_DEBUG_KMS("could not create framebuffer\n");
c394c2b0 3242 return fb;
f453ba04
DA		 3243 }
3244
c394c2b0
MR		 3245 return fb;
3246}
4b096ac1 3247
c394c2b0
MR		 3248/**
3249 * drm_mode_addfb2 - add an FB to the graphics configuration
3250 * @dev: drm device for the ioctl
3251 * @data: data pointer for the ioctl
3252 * @file_priv: drm file for the ioctl call
3253 *
3254 * Add a new FB to the specified CRTC, given a user request with format. This is
3255 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
3256 * and uses fourcc codes as pixel format specifiers.
3257 *
3258 * Called by the user via ioctl.
3259 *
3260 * Returns:
1a498633 3261 * Zero on success, negative errno on failure.
c394c2b0
MR		 3262 */
3263int drm_mode_addfb2(struct drm_device *dev,
3264 void *data, struct drm_file *file_priv)
3265{
9a6f5130 3266 struct drm_mode_fb_cmd2 *r = data;
c394c2b0
MR		 3267 struct drm_framebuffer *fb;
3268
3269 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3270 return -EINVAL;
3271
9a6f5130 3272 fb = internal_framebuffer_create(dev, r, file_priv);
c394c2b0
MR		 3273 if (IS_ERR(fb))
3274 return PTR_ERR(fb);
3275
9a6f5130
CW		 3276 /* Transfer ownership to the filp for reaping on close */
3277
3278 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
3279 mutex_lock(&file_priv->fbs_lock);
3280 r->fb_id = fb->base.id;
3281 list_add(&fb->filp_head, &file_priv->fbs);
3282 mutex_unlock(&file_priv->fbs_lock);
3283
c394c2b0 3284 return 0;
f453ba04
DA		 3285}
3286
3287/**
3288 * drm_mode_rmfb - remove an FB from the configuration
065a50ed
DV		 3289 * @dev: drm device for the ioctl
3290 * @data: data pointer for the ioctl
3291 * @file_priv: drm file for the ioctl call
f453ba04 3292 *
f453ba04
DA		 3293 * Remove the FB specified by the user.
3294 *
3295 * Called by the user via ioctl.
3296 *
c8e32cc1 3297 * Returns:
1a498633 3298 * Zero on success, negative errno on failure.
f453ba04
DA		 3299 */
3300int drm_mode_rmfb(struct drm_device *dev,
3301 void *data, struct drm_file *file_priv)
3302{
f453ba04
DA		 3303 struct drm_framebuffer *fb = NULL;
3304 struct drm_framebuffer *fbl = NULL;
3305 uint32_t *id = data;
f453ba04
DA		 3306 int found = 0;
3307
fb3b06c8
DA		 3308 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3309 return -EINVAL;
3310
4b096ac1 3311 mutex_lock(&file_priv->fbs_lock);
2b677e8c
DV		 3312 mutex_lock(&dev->mode_config.fb_lock);
3313 fb = __drm_framebuffer_lookup(dev, *id);
3314 if (!fb)
3315 goto fail_lookup;
3316
f453ba04
DA		 3317 list_for_each_entry(fbl, &file_priv->fbs, filp_head)
3318 if (fb == fbl)
3319 found = 1;
2b677e8c
DV		 3320 if (!found)
3321 goto fail_lookup;
3322
4b096ac1 3323 list_del_init(&fb->filp_head);
2b677e8c 3324 mutex_unlock(&dev->mode_config.fb_lock);
4b096ac1 3325 mutex_unlock(&file_priv->fbs_lock);
f453ba04 3326
13803132 3327 drm_framebuffer_unreference(fb);
4b096ac1 3328
2b677e8c
DV		 3329 return 0;
3330
3331fail_lookup:
3332 mutex_unlock(&dev->mode_config.fb_lock);
3333 mutex_unlock(&file_priv->fbs_lock);
3334
37c4e705 3335 return -ENOENT;
f453ba04
DA		 3336}
3337
3338/**
3339 * drm_mode_getfb - get FB info
065a50ed
DV		 3340 * @dev: drm device for the ioctl
3341 * @data: data pointer for the ioctl
3342 * @file_priv: drm file for the ioctl call
f453ba04 3343 *
f453ba04
DA		 3344 * Lookup the FB given its ID and return info about it.
3345 *
3346 * Called by the user via ioctl.
3347 *
c8e32cc1 3348 * Returns:
1a498633 3349 * Zero on success, negative errno on failure.
f453ba04
DA		 3350 */
3351int drm_mode_getfb(struct drm_device *dev,
3352 void *data, struct drm_file *file_priv)
3353{
3354 struct drm_mode_fb_cmd *r = data;
f453ba04 3355 struct drm_framebuffer *fb;
58c0dca1 3356 int ret;
f453ba04 3357
fb3b06c8
DA		 3358 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3359 return -EINVAL;
3360
786b99ed 3361 fb = drm_framebuffer_lookup(dev, r->fb_id);
58c0dca1 3362 if (!fb)
37c4e705 3363 return -ENOENT;
f453ba04
DA		 3364
3365 r->height = fb->height;
3366 r->width = fb->width;
3367 r->depth = fb->depth;
3368 r->bpp = fb->bits_per_pixel;
01f2c773 3369 r->pitch = fb->pitches[0];
101b96f3 3370 if (fb->funcs->create_handle) {
09f308f7 3371 if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
43683057 3372 drm_is_control_client(file_priv)) {
101b96f3
DH		 3373 ret = fb->funcs->create_handle(fb, file_priv,
3374 &r->handle);
3375 } else {
3376 /* GET_FB() is an unprivileged ioctl so we must not
3377 * return a buffer-handle to non-master processes! For
3378 * backwards-compatibility reasons, we cannot make
3379 * GET_FB() privileged, so just return an invalid handle
3380 * for non-masters. */
3381 r->handle = 0;
3382 ret = 0;
3383 }
3384 } else {
af26ef3b 3385 ret = -ENODEV;
101b96f3 3386 }
f453ba04 3387
58c0dca1
DV		 3388 drm_framebuffer_unreference(fb);
3389
f453ba04
DA		 3390 return ret;
3391}
3392
c8e32cc1
DV		 3393/**
3394 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
3395 * @dev: drm device for the ioctl
3396 * @data: data pointer for the ioctl
3397 * @file_priv: drm file for the ioctl call
3398 *
3399 * Lookup the FB and flush out the damaged area supplied by userspace as a clip
3400 * rectangle list. Generic userspace which does frontbuffer rendering must call
3401 * this ioctl to flush out the changes on manual-update display outputs, e.g.
3402 * usb display-link, mipi manual update panels or edp panel self refresh modes.
3403 *
3404 * Modesetting drivers which always update the frontbuffer do not need to
3405 * implement the corresponding ->dirty framebuffer callback.
3406 *
3407 * Called by the user via ioctl.
3408 *
3409 * Returns:
1a498633 3410 * Zero on success, negative errno on failure.
c8e32cc1 3411 */
884840aa
JB		 3412int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
3413 void *data, struct drm_file *file_priv)
3414{
3415 struct drm_clip_rect __user *clips_ptr;
3416 struct drm_clip_rect *clips = NULL;
3417 struct drm_mode_fb_dirty_cmd *r = data;
884840aa
JB		 3418 struct drm_framebuffer *fb;
3419 unsigned flags;
3420 int num_clips;
4a1b0714 3421 int ret;
884840aa 3422
fb3b06c8
DA		 3423 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3424 return -EINVAL;
3425
786b99ed 3426 fb = drm_framebuffer_lookup(dev, r->fb_id);
4ccf097f 3427 if (!fb)
37c4e705 3428 return -ENOENT;
884840aa
JB		 3429
3430 num_clips = r->num_clips;
81f6c7f8 3431 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
884840aa
JB		 3432
3433 if (!num_clips != !clips_ptr) {
3434 ret = -EINVAL;
3435 goto out_err1;
3436 }
3437
3438 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
3439
3440 /* If userspace annotates copy, clips must come in pairs */
3441 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
3442 ret = -EINVAL;
3443 goto out_err1;
3444 }
3445
3446 if (num_clips && clips_ptr) {
a5cd3351
XW		 3447 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
3448 ret = -EINVAL;
3449 goto out_err1;
3450 }
bd3f0ff9 3451 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
884840aa
JB		 3452 if (!clips) {
3453 ret = -ENOMEM;
3454 goto out_err1;
3455 }
3456
3457 ret = copy_from_user(clips, clips_ptr,
3458 num_clips * sizeof(*clips));
e902a358
DC		 3459 if (ret) {
3460 ret = -EFAULT;
884840aa 3461 goto out_err2;
e902a358 3462 }
884840aa
JB		 3463 }
3464
3465 if (fb->funcs->dirty) {
02b00162
TH		 3466 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
3467 clips, num_clips);
884840aa
JB		 3468 } else {
3469 ret = -ENOSYS;
884840aa
JB		 3470 }
3471
3472out_err2:
3473 kfree(clips);
3474out_err1:
4ccf097f
DV		 3475 drm_framebuffer_unreference(fb);
3476
884840aa
JB		 3477 return ret;
3478}
3479
3480
f453ba04
DA		 3481/**
3482 * drm_fb_release - remove and free the FBs on this file
065a50ed 3483 * @priv: drm file for the ioctl
f453ba04 3484 *
f453ba04
DA		 3485 * Destroy all the FBs associated with @filp.
3486 *
3487 * Called by the user via ioctl.
3488 *
c8e32cc1 3489 * Returns:
1a498633 3490 * Zero on success, negative errno on failure.
f453ba04 3491 */
ea39f835 3492void drm_fb_release(struct drm_file *priv)
f453ba04 3493{
f453ba04
DA		 3494 struct drm_framebuffer *fb, *tfb;
3495
1b116297
DV		 3496 /*
3497 * When the file gets released that means no one else can access the fb
e2db726b 3498 * list any more, so no need to grab fpriv->fbs_lock. And we need to
1b116297
DV		 3499 * avoid upsetting lockdep since the universal cursor code adds a
3500 * framebuffer while holding mutex locks.
3501 *
3502 * Note that a real deadlock between fpriv->fbs_lock and the modeset
3503 * locks is impossible here since no one else but this function can get
3504 * at it any more.
3505 */
f453ba04 3506 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
4b096ac1 3507 list_del_init(&fb->filp_head);
2b677e8c 3508
73f7570b 3509 /* This drops the fpriv->fbs reference. */
13803132 3510 drm_framebuffer_unreference(fb);
f453ba04 3511 }
f453ba04
DA		 3512}
3513
c8e32cc1
DV		 3514/**
3515 * drm_property_create - create a new property type
3516 * @dev: drm device
3517 * @flags: flags specifying the property type
3518 * @name: name of the property
3519 * @num_values: number of pre-defined values
3520 *
3521 * This creates a new generic drm property which can then be attached to a drm
3522 * object with drm_object_attach_property. The returned property object must be
3523 * freed with drm_property_destroy.
3524 *
3b5b9932
DL		 3525 * Note that the DRM core keeps a per-device list of properties and that, if
3526 * drm_mode_config_cleanup() is called, it will destroy all properties created
3527 * by the driver.
3528 *
c8e32cc1
DV		 3529 * Returns:
3530 * A pointer to the newly created property on success, NULL on failure.
3531 */
f453ba04
DA		 3532struct drm_property *drm_property_create(struct drm_device *dev, int flags,
3533 const char *name, int num_values)
3534{
3535 struct drm_property *property = NULL;
6bfc56aa 3536 int ret;
f453ba04
DA		 3537
3538 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
3539 if (!property)
3540 return NULL;
3541
98f75de4
RC		 3542 property->dev = dev;
3543
f453ba04 3544 if (num_values) {
bd3f0ff9
TR		 3545 property->values = kcalloc(num_values, sizeof(uint64_t),
3546 GFP_KERNEL);
f453ba04
DA		 3547 if (!property->values)
3548 goto fail;
3549 }
3550
6bfc56aa
VS		 3551 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
3552 if (ret)
3553 goto fail;
3554
f453ba04
DA		 3555 property->flags = flags;
3556 property->num_values = num_values;
3758b341 3557 INIT_LIST_HEAD(&property->enum_list);
f453ba04 3558
471dd2ef 3559 if (name) {
f453ba04 3560 strncpy(property->name, name, DRM_PROP_NAME_LEN);
471dd2ef
VL		 3561 property->name[DRM_PROP_NAME_LEN-1] = '\0';
3562 }
f453ba04
DA		 3563
3564 list_add_tail(&property->head, &dev->mode_config.property_list);
5ea22f24
RC		 3565
3566 WARN_ON(!drm_property_type_valid(property));
3567
f453ba04
DA		 3568 return property;
3569fail:
6bfc56aa 3570 kfree(property->values);
f453ba04
DA		 3571 kfree(property);
3572 return NULL;
3573}
3574EXPORT_SYMBOL(drm_property_create);
3575
c8e32cc1 3576/**
2aa9d2bc 3577 * drm_property_create_enum - create a new enumeration property type
c8e32cc1
DV		 3578 * @dev: drm device
3579 * @flags: flags specifying the property type
3580 * @name: name of the property
3581 * @props: enumeration lists with property values
3582 * @num_values: number of pre-defined values
3583 *
3584 * This creates a new generic drm property which can then be attached to a drm
3585 * object with drm_object_attach_property. The returned property object must be
3586 * freed with drm_property_destroy.
3587 *
3588 * Userspace is only allowed to set one of the predefined values for enumeration
3589 * properties.
3590 *
3591 * Returns:
3592 * A pointer to the newly created property on success, NULL on failure.
3593 */
4a67d391
SH		 3594struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
3595 const char *name,
3596 const struct drm_prop_enum_list *props,
3597 int num_values)
3598{
3599 struct drm_property *property;
3600 int i, ret;
3601
3602 flags |= DRM_MODE_PROP_ENUM;
3603
3604 property = drm_property_create(dev, flags, name, num_values);
3605 if (!property)
3606 return NULL;
3607
3608 for (i = 0; i < num_values; i++) {
3609 ret = drm_property_add_enum(property, i,
3610 props[i].type,
3611 props[i].name);
3612 if (ret) {
3613 drm_property_destroy(dev, property);
3614 return NULL;
3615 }
3616 }
3617
3618 return property;
3619}
3620EXPORT_SYMBOL(drm_property_create_enum);
3621
c8e32cc1 3622/**
2aa9d2bc 3623 * drm_property_create_bitmask - create a new bitmask property type
c8e32cc1
DV		 3624 * @dev: drm device
3625 * @flags: flags specifying the property type
3626 * @name: name of the property
3627 * @props: enumeration lists with property bitflags
295ee853
DV		 3628 * @num_props: size of the @props array
3629 * @supported_bits: bitmask of all supported enumeration values
c8e32cc1 3630 *
295ee853 3631 * This creates a new bitmask drm property which can then be attached to a drm
c8e32cc1
DV		 3632 * object with drm_object_attach_property. The returned property object must be
3633 * freed with drm_property_destroy.
3634 *
3635 * Compared to plain enumeration properties userspace is allowed to set any
3636 * or'ed together combination of the predefined property bitflag values
3637 *
3638 * Returns:
3639 * A pointer to the newly created property on success, NULL on failure.
3640 */
49e27545
RC		 3641struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
3642 int flags, const char *name,
3643 const struct drm_prop_enum_list *props,
7689ffb3
VS		 3644 int num_props,
3645 uint64_t supported_bits)
49e27545
RC		 3646{
3647 struct drm_property *property;
7689ffb3
VS		 3648 int i, ret, index = 0;
3649 int num_values = hweight64(supported_bits);
49e27545
RC		 3650
3651 flags |= DRM_MODE_PROP_BITMASK;
3652
3653 property = drm_property_create(dev, flags, name, num_values);
3654 if (!property)
3655 return NULL;
7689ffb3
VS		 3656 for (i = 0; i < num_props; i++) {
3657 if (!(supported_bits & (1ULL << props[i].type)))
3658 continue;
49e27545 3659
7689ffb3
VS		 3660 if (WARN_ON(index >= num_values)) {
3661 drm_property_destroy(dev, property);
3662 return NULL;
3663 }
3664
3665 ret = drm_property_add_enum(property, index++,
49e27545
RC		 3666 props[i].type,
3667 props[i].name);
3668 if (ret) {
3669 drm_property_destroy(dev, property);
3670 return NULL;
3671 }
3672 }
3673
3674 return property;
3675}
3676EXPORT_SYMBOL(drm_property_create_bitmask);
3677
ebc44cf3
RC		 3678static struct drm_property *property_create_range(struct drm_device *dev,
3679 int flags, const char *name,
3680 uint64_t min, uint64_t max)
3681{
3682 struct drm_property *property;
3683
3684 property = drm_property_create(dev, flags, name, 2);
3685 if (!property)
3686 return NULL;
3687
3688 property->values[0] = min;
3689 property->values[1] = max;
3690
3691 return property;
3692}
3693
c8e32cc1 3694/**
960cd9d4 3695 * drm_property_create_range - create a new unsigned ranged property type
c8e32cc1
DV		 3696 * @dev: drm device
3697 * @flags: flags specifying the property type
3698 * @name: name of the property
3699 * @min: minimum value of the property
3700 * @max: maximum value of the property
3701 *
3702 * This creates a new generic drm property which can then be attached to a drm
3703 * object with drm_object_attach_property. The returned property object must be
3704 * freed with drm_property_destroy.
3705 *
960cd9d4
DV		 3706 * Userspace is allowed to set any unsigned integer value in the (min, max)
3707 * range inclusive.
c8e32cc1
DV		 3708 *
3709 * Returns:
3710 * A pointer to the newly created property on success, NULL on failure.
3711 */
d9bc3c02
SH		 3712struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
3713 const char *name,
3714 uint64_t min, uint64_t max)
3715{
ebc44cf3
RC		 3716 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags,
3717 name, min, max);
d9bc3c02
SH		 3718}
3719EXPORT_SYMBOL(drm_property_create_range);
3720
960cd9d4
DV		 3721/**
3722 * drm_property_create_signed_range - create a new signed ranged property type
3723 * @dev: drm device
3724 * @flags: flags specifying the property type
3725 * @name: name of the property
3726 * @min: minimum value of the property
3727 * @max: maximum value of the property
3728 *
3729 * This creates a new generic drm property which can then be attached to a drm
3730 * object with drm_object_attach_property. The returned property object must be
3731 * freed with drm_property_destroy.
3732 *
3733 * Userspace is allowed to set any signed integer value in the (min, max)
3734 * range inclusive.
3735 *
3736 * Returns:
3737 * A pointer to the newly created property on success, NULL on failure.
3738 */
ebc44cf3
RC		 3739struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
3740 int flags, const char *name,
3741 int64_t min, int64_t max)
3742{
3743 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags,
3744 name, I642U64(min), I642U64(max));
3745}
3746EXPORT_SYMBOL(drm_property_create_signed_range);
3747
960cd9d4
DV		 3748/**
3749 * drm_property_create_object - create a new object property type
3750 * @dev: drm device
3751 * @flags: flags specifying the property type
3752 * @name: name of the property
3753 * @type: object type from DRM_MODE_OBJECT_* defines
3754 *
3755 * This creates a new generic drm property which can then be attached to a drm
3756 * object with drm_object_attach_property. The returned property object must be
3757 * freed with drm_property_destroy.
3758 *
3759 * Userspace is only allowed to set this to any property value of the given
3760 * @type. Only useful for atomic properties, which is enforced.
3761 *
3762 * Returns:
3763 * A pointer to the newly created property on success, NULL on failure.
3764 */
98f75de4
RC		 3765struct drm_property *drm_property_create_object(struct drm_device *dev,
3766 int flags, const char *name, uint32_t type)
3767{
3768 struct drm_property *property;
3769
3770 flags |= DRM_MODE_PROP_OBJECT;
3771
960cd9d4
DV		 3772 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC)))
3773 return NULL;
3774
98f75de4
RC		 3775 property = drm_property_create(dev, flags, name, 1);
3776 if (!property)
3777 return NULL;
3778
3779 property->values[0] = type;
3780
3781 return property;
3782}
3783EXPORT_SYMBOL(drm_property_create_object);
3784
960cd9d4
DV		 3785/**
3786 * drm_property_create_bool - create a new boolean property type
3787 * @dev: drm device
3788 * @flags: flags specifying the property type
3789 * @name: name of the property
3790 *
3791 * This creates a new generic drm property which can then be attached to a drm
3792 * object with drm_object_attach_property. The returned property object must be
3793 * freed with drm_property_destroy.
3794 *
3795 * This is implemented as a ranged property with only {0, 1} as valid values.
3796 *
3797 * Returns:
3798 * A pointer to the newly created property on success, NULL on failure.
3799 */
3800struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags,
3801 const char *name)
3802{
3803 return drm_property_create_range(dev, flags, name, 0, 1);
3804}
3805EXPORT_SYMBOL(drm_property_create_bool);
3806
c8e32cc1
DV		 3807/**
3808 * drm_property_add_enum - add a possible value to an enumeration property
3809 * @property: enumeration property to change
3810 * @index: index of the new enumeration
3811 * @value: value of the new enumeration
3812 * @name: symbolic name of the new enumeration
3813 *
3814 * This functions adds enumerations to a property.
3815 *
3816 * It's use is deprecated, drivers should use one of the more specific helpers
3817 * to directly create the property with all enumerations already attached.
3818 *
3819 * Returns:
3820 * Zero on success, error code on failure.
3821 */
f453ba04
DA		 3822int drm_property_add_enum(struct drm_property *property, int index,
3823 uint64_t value, const char *name)
3824{
3825 struct drm_property_enum *prop_enum;
3826
5ea22f24
RC		 3827 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
3828 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
49e27545
RC		 3829 return -EINVAL;
3830
3831 /*
3832 * Bitmask enum properties have the additional constraint of values
3833 * from 0 to 63
3834 */
5ea22f24
RC		 3835 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
3836 (value > 63))
f453ba04
DA		 3837 return -EINVAL;
3838
3758b341
DV		 3839 if (!list_empty(&property->enum_list)) {
3840 list_for_each_entry(prop_enum, &property->enum_list, head) {
f453ba04
DA		 3841 if (prop_enum->value == value) {
3842 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3843 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3844 return 0;
3845 }
3846 }
3847 }
3848
3849 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
3850 if (!prop_enum)
3851 return -ENOMEM;
3852
3853 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3854 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3855 prop_enum->value = value;
3856
3857 property->values[index] = value;
3758b341 3858 list_add_tail(&prop_enum->head, &property->enum_list);
f453ba04
DA		 3859 return 0;
3860}
3861EXPORT_SYMBOL(drm_property_add_enum);
3862
c8e32cc1
DV		 3863/**
3864 * drm_property_destroy - destroy a drm property
3865 * @dev: drm device
3866 * @property: property to destry
3867 *
3868 * This function frees a property including any attached resources like
3869 * enumeration values.
3870 */
f453ba04
DA		 3871void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
3872{
3873 struct drm_property_enum *prop_enum, *pt;
3874
3758b341 3875 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) {
f453ba04
DA		 3876 list_del(&prop_enum->head);
3877 kfree(prop_enum);
3878 }
3879
3880 if (property->num_values)
3881 kfree(property->values);
3882 drm_mode_object_put(dev, &property->base);
3883 list_del(&property->head);
3884 kfree(property);
3885}
3886EXPORT_SYMBOL(drm_property_destroy);
3887
c8e32cc1
DV		 3888/**
3889 * drm_object_attach_property - attach a property to a modeset object
3890 * @obj: drm modeset object
3891 * @property: property to attach
3892 * @init_val: initial value of the property
3893 *
3894 * This attaches the given property to the modeset object with the given initial
3895 * value. Currently this function cannot fail since the properties are stored in
3896 * a statically sized array.
3897 */
c543188a
PZ		 3898void drm_object_attach_property(struct drm_mode_object *obj,
3899 struct drm_property *property,
3900 uint64_t init_val)
3901{
7f88a9be 3902 int count = obj->properties->count;
c543188a 3903
7f88a9be
PZ		 3904 if (count == DRM_OBJECT_MAX_PROPERTY) {
3905 WARN(1, "Failed to attach object property (type: 0x%x). Please "
3906 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
3907 "you see this message on the same object type.\n",
3908 obj->type);
3909 return;
c543188a
PZ		 3910 }
3911
b17cd757 3912 obj->properties->properties[count] = property;
7f88a9be
PZ		 3913 obj->properties->values[count] = init_val;
3914 obj->properties->count++;
88a48e29
RC		 3915 if (property->flags & DRM_MODE_PROP_ATOMIC)
3916 obj->properties->atomic_count++;
c543188a
PZ		 3917}
3918EXPORT_SYMBOL(drm_object_attach_property);
3919
c8e32cc1
DV		 3920/**
3921 * drm_object_property_set_value - set the value of a property
3922 * @obj: drm mode object to set property value for
3923 * @property: property to set
3924 * @val: value the property should be set to
3925 *
3926 * This functions sets a given property on a given object. This function only
3927 * changes the software state of the property, it does not call into the
3928 * driver's ->set_property callback.
3929 *
3930 * Returns:
3931 * Zero on success, error code on failure.
3932 */
c543188a
PZ		 3933int drm_object_property_set_value(struct drm_mode_object *obj,
3934 struct drm_property *property, uint64_t val)
3935{
3936 int i;
3937
7f88a9be 3938 for (i = 0; i < obj->properties->count; i++) {
b17cd757 3939 if (obj->properties->properties[i] == property) {
c543188a
PZ		 3940 obj->properties->values[i] = val;
3941 return 0;
3942 }
3943 }
3944
3945 return -EINVAL;
3946}
3947EXPORT_SYMBOL(drm_object_property_set_value);
3948
c8e32cc1
DV		 3949/**
3950 * drm_object_property_get_value - retrieve the value of a property
3951 * @obj: drm mode object to get property value from
3952 * @property: property to retrieve
3953 * @val: storage for the property value
3954 *
3955 * This function retrieves the softare state of the given property for the given
3956 * property. Since there is no driver callback to retrieve the current property
3957 * value this might be out of sync with the hardware, depending upon the driver
3958 * and property.
3959 *
3960 * Returns:
3961 * Zero on success, error code on failure.
3962 */
c543188a
PZ		 3963int drm_object_property_get_value(struct drm_mode_object *obj,
3964 struct drm_property *property, uint64_t *val)
3965{
3966 int i;
3967
88a48e29
RC		 3968 /* read-only properties bypass atomic mechanism and still store
3969 * their value in obj->properties->values[].. mostly to avoid
3970 * having to deal w/ EDID and similar props in atomic paths:
3971 */
3972 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
3973 !(property->flags & DRM_MODE_PROP_IMMUTABLE))
3974 return drm_atomic_get_property(obj, property, val);
3975
7f88a9be 3976 for (i = 0; i < obj->properties->count; i++) {
b17cd757 3977 if (obj->properties->properties[i] == property) {
c543188a
PZ		 3978 *val = obj->properties->values[i];
3979 return 0;
3980 }
3981 }
3982
3983 return -EINVAL;
3984}
3985EXPORT_SYMBOL(drm_object_property_get_value);
3986
c8e32cc1 3987/**
1a498633 3988 * drm_mode_getproperty_ioctl - get the property metadata
c8e32cc1
DV		 3989 * @dev: DRM device
3990 * @data: ioctl data
3991 * @file_priv: DRM file info
3992 *
1a498633
DV		 3993 * This function retrieves the metadata for a given property, like the different
3994 * possible values for an enum property or the limits for a range property.
3995 *
3996 * Blob properties are special
c8e32cc1
DV		 3997 *
3998 * Called by the user via ioctl.
3999 *
4000 * Returns:
1a498633 4001 * Zero on success, negative errno on failure.
c8e32cc1 4002 */
f453ba04
DA		 4003int drm_mode_getproperty_ioctl(struct drm_device *dev,
4004 void *data, struct drm_file *file_priv)
4005{
f453ba04
DA		 4006 struct drm_mode_get_property *out_resp = data;
4007 struct drm_property *property;
4008 int enum_count = 0;
f453ba04
DA		 4009 int value_count = 0;
4010 int ret = 0, i;
4011 int copied;
4012 struct drm_property_enum *prop_enum;
4013 struct drm_mode_property_enum __user *enum_ptr;
f453ba04 4014 uint64_t __user *values_ptr;
f453ba04 4015
fb3b06c8
DA		 4016 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4017 return -EINVAL;
4018
84849903 4019 drm_modeset_lock_all(dev);
a2b34e22
RC		 4020 property = drm_property_find(dev, out_resp->prop_id);
4021 if (!property) {
f27657f2 4022 ret = -ENOENT;
f453ba04
DA		 4023 goto done;
4024 }
f453ba04 4025
5ea22f24
RC		 4026 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4027 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
3758b341 4028 list_for_each_entry(prop_enum, &property->enum_list, head)
f453ba04 4029 enum_count++;
f453ba04
DA		 4030 }
4031
4032 value_count = property->num_values;
4033
4034 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
4035 out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
4036 out_resp->flags = property->flags;
4037
4038 if ((out_resp->count_values >= value_count) && value_count) {
81f6c7f8 4039 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
f453ba04
DA		 4040 for (i = 0; i < value_count; i++) {
4041 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
4042 ret = -EFAULT;
4043 goto done;
4044 }
4045 }
4046 }
4047 out_resp->count_values = value_count;
4048
5ea22f24
RC		 4049 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4050 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
f453ba04
DA		 4051 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
4052 copied = 0;
81f6c7f8 4053 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
3758b341 4054 list_for_each_entry(prop_enum, &property->enum_list, head) {
f453ba04
DA		 4055
4056 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
4057 ret = -EFAULT;
4058 goto done;
4059 }
4060
4061 if (copy_to_user(&enum_ptr[copied].name,
4062 &prop_enum->name, DRM_PROP_NAME_LEN)) {
4063 ret = -EFAULT;
4064 goto done;
4065 }
4066 copied++;
4067 }
4068 }
4069 out_resp->count_enum_blobs = enum_count;
4070 }
4071
3758b341
DV		 4072 /*
4073 * NOTE: The idea seems to have been to use this to read all the blob
4074 * property values. But nothing ever added them to the corresponding
4075 * list, userspace always used the special-purpose get_blob ioctl to
4076 * read the value for a blob property. It also doesn't make a lot of
4077 * sense to return values here when everything else is just metadata for
4078 * the property itself.
4079 */
4080 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4081 out_resp->count_enum_blobs = 0;
f453ba04 4082done:
84849903 4083 drm_modeset_unlock_all(dev);
f453ba04
DA		 4084 return ret;
4085}
4086
99531d9b
DS		 4087/**
4088 * drm_property_create_blob - Create new blob property
4089 *
4090 * Creates a new blob property for a specified DRM device, optionally
4091 * copying data.
4092 *
4093 * @dev: DRM device to create property for
4094 * @length: Length to allocate for blob data
4095 * @data: If specified, copies data into blob
10e8cb7e
DS		 4096 *
4097 * Returns:
4098 * New blob property with a single reference on success, or an ERR_PTR
4099 * value on failure.
99531d9b 4100 */
6bcacf51 4101struct drm_property_blob *
ecbbe59b 4102drm_property_create_blob(struct drm_device *dev, size_t length,
12e6cecd 4103 const void *data)
f453ba04
DA		 4104{
4105 struct drm_property_blob *blob;
6bfc56aa 4106 int ret;
f453ba04 4107
99531d9b 4108 if (!length)
10e8cb7e 4109 return ERR_PTR(-EINVAL);
f453ba04
DA		 4110
4111 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
4112 if (!blob)
10e8cb7e 4113 return ERR_PTR(-ENOMEM);
f453ba04 4114
e2f5d2ea
DS		 4115 /* This must be explicitly initialised, so we can safely call list_del
4116 * on it in the removal handler, even if it isn't in a file list. */
4117 INIT_LIST_HEAD(&blob->head_file);
8fb6e7a5 4118 blob->length = length;
6bcacf51 4119 blob->dev = dev;
8fb6e7a5 4120
99531d9b
DS		 4121 if (data)
4122 memcpy(blob->data, data, length);
8fb6e7a5
DS		 4123
4124 mutex_lock(&dev->mode_config.blob_lock);
4125
6bfc56aa
VS		 4126 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
4127 if (ret) {
4128 kfree(blob);
8fb6e7a5 4129 mutex_unlock(&dev->mode_config.blob_lock);
10e8cb7e 4130 return ERR_PTR(-EINVAL);
6bfc56aa
VS		 4131 }
4132
6bcacf51 4133 kref_init(&blob->refcount);
f453ba04 4134
e2f5d2ea
DS		 4135 list_add_tail(&blob->head_global,
4136 &dev->mode_config.property_blob_list);
f453ba04 4137
8fb6e7a5 4138 mutex_unlock(&dev->mode_config.blob_lock);
f453ba04 4139
f453ba04
DA		 4140 return blob;
4141}
6bcacf51 4142EXPORT_SYMBOL(drm_property_create_blob);
f453ba04 4143
6bcacf51
DS		 4144/**
4145 * drm_property_free_blob - Blob property destructor
4146 *
4147 * Internal free function for blob properties; must not be used directly.
4148 *
f102c16e 4149 * @kref: Reference
6bcacf51
DS		 4150 */
4151static void drm_property_free_blob(struct kref *kref)
f453ba04 4152{
6bcacf51
DS		 4153 struct drm_property_blob *blob =
4154 container_of(kref, struct drm_property_blob, refcount);
4155
4156 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock));
4157
e2f5d2ea
DS		 4158 list_del(&blob->head_global);
4159 list_del(&blob->head_file);
6bcacf51 4160 drm_mode_object_put(blob->dev, &blob->base);
8fb6e7a5 4161
f453ba04
DA		 4162 kfree(blob);
4163}
4164
6bcacf51
DS		 4165/**
4166 * drm_property_unreference_blob - Unreference a blob property
4167 *
4168 * Drop a reference on a blob property. May free the object.
4169 *
f102c16e 4170 * @blob: Pointer to blob property
6bcacf51
DS		 4171 */
4172void drm_property_unreference_blob(struct drm_property_blob *blob)
4173{
4174 struct drm_device *dev;
4175
4176 if (!blob)
4177 return;
4178
4179 dev = blob->dev;
4180
4181 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4182
4183 if (kref_put_mutex(&blob->refcount, drm_property_free_blob,
4184 &dev->mode_config.blob_lock))
4185 mutex_unlock(&dev->mode_config.blob_lock);
4186 else
4187 might_lock(&dev->mode_config.blob_lock);
6bcacf51
DS		 4188}
4189EXPORT_SYMBOL(drm_property_unreference_blob);
4190
4191/**
4192 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held
4193 *
4194 * Drop a reference on a blob property. May free the object. This must be
4195 * called with blob_lock held.
4196 *
f102c16e 4197 * @blob: Pointer to blob property
6bcacf51
DS		 4198 */
4199static void drm_property_unreference_blob_locked(struct drm_property_blob *blob)
4200{
4201 if (!blob)
4202 return;
4203
4204 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4205
4206 kref_put(&blob->refcount, drm_property_free_blob);
4207}
4208
e2f5d2ea
DS		 4209/**
4210 * drm_property_destroy_user_blobs - destroy all blobs created by this client
4211 * @dev: DRM device
4212 * @file_priv: destroy all blobs owned by this file handle
4213 */
4214void drm_property_destroy_user_blobs(struct drm_device *dev,
4215 struct drm_file *file_priv)
4216{
4217 struct drm_property_blob *blob, *bt;
4218
4219 mutex_lock(&dev->mode_config.blob_lock);
4220
4221 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) {
4222 list_del_init(&blob->head_file);
4223 drm_property_unreference_blob_locked(blob);
4224 }
4225
4226 mutex_unlock(&dev->mode_config.blob_lock);
4227}
4228
6bcacf51
DS		 4229/**
4230 * drm_property_reference_blob - Take a reference on an existing property
4231 *
4232 * Take a new reference on an existing blob property.
4233 *
f102c16e 4234 * @blob: Pointer to blob property
6bcacf51
DS		 4235 */
4236struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob)
4237{
4238 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4239 kref_get(&blob->refcount);
4240 return blob;
4241}
4242EXPORT_SYMBOL(drm_property_reference_blob);
4243
4244/*
4245 * Like drm_property_lookup_blob, but does not return an additional reference.
4246 * Must be called with blob_lock held.
4247 */
4248static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev,
4249 uint32_t id)
4250{
4251 struct drm_mode_object *obj = NULL;
4252 struct drm_property_blob *blob;
4253
4254 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock));
4255
4256 mutex_lock(&dev->mode_config.idr_mutex);
4257 obj = idr_find(&dev->mode_config.crtc_idr, id);
4258 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id))
4259 blob = NULL;
4260 else
4261 blob = obj_to_blob(obj);
4262 mutex_unlock(&dev->mode_config.idr_mutex);
4263
4264 return blob;
4265}
4266
4267/**
4268 * drm_property_lookup_blob - look up a blob property and take a reference
4269 * @dev: drm device
4270 * @id: id of the blob property
4271 *
4272 * If successful, this takes an additional reference to the blob property.
4273 * callers need to make sure to eventually unreference the returned property
4274 * again, using @drm_property_unreference_blob.
4275 */
4276struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev,
4277 uint32_t id)
4278{
4279 struct drm_property_blob *blob;
4280
4281 mutex_lock(&dev->mode_config.blob_lock);
4282 blob = __drm_property_lookup_blob(dev, id);
4283 if (blob) {
4284 if (!kref_get_unless_zero(&blob->refcount))
4285 blob = NULL;
4286 }
4287 mutex_unlock(&dev->mode_config.blob_lock);
4288
4289 return blob;
4290}
4291EXPORT_SYMBOL(drm_property_lookup_blob);
4292
d2ed3436
DS		 4293/**
4294 * drm_property_replace_global_blob - atomically replace existing blob property
4295 * @dev: drm device
4296 * @replace: location of blob property pointer to be replaced
4297 * @length: length of data for new blob, or 0 for no data
4298 * @data: content for new blob, or NULL for no data
4299 * @obj_holds_id: optional object for property holding blob ID
4300 * @prop_holds_id: optional property holding blob ID
4301 * @return 0 on success or error on failure
4302 *
4303 * This function will atomically replace a global property in the blob list,
4304 * optionally updating a property which holds the ID of that property. It is
4305 * guaranteed to be atomic: no caller will be allowed to see intermediate
4306 * results, and either the entire operation will succeed and clean up the
4307 * previous property, or it will fail and the state will be unchanged.
4308 *
4309 * If length is 0 or data is NULL, no new blob will be created, and the holding
4310 * property, if specified, will be set to 0.
4311 *
4312 * Access to the replace pointer is assumed to be protected by the caller, e.g.
4313 * by holding the relevant modesetting object lock for its parent.
4314 *
4315 * For example, a drm_connector has a 'PATH' property, which contains the ID
4316 * of a blob property with the value of the MST path information. Calling this
4317 * function with replace pointing to the connector's path_blob_ptr, length and
4318 * data set for the new path information, obj_holds_id set to the connector's
4319 * base object, and prop_holds_id set to the path property name, will perform
4320 * a completely atomic update. The access to path_blob_ptr is protected by the
4321 * caller holding a lock on the connector.
4322 */
4323static int drm_property_replace_global_blob(struct drm_device *dev,
4324 struct drm_property_blob **replace,
4325 size_t length,
4326 const void *data,
4327 struct drm_mode_object *obj_holds_id,
4328 struct drm_property *prop_holds_id)
4329{
4330 struct drm_property_blob *new_blob = NULL;
4331 struct drm_property_blob *old_blob = NULL;
4332 int ret;
4333
4334 WARN_ON(replace == NULL);
4335
4336 old_blob = *replace;
4337
4338 if (length && data) {
4339 new_blob = drm_property_create_blob(dev, length, data);
10e8cb7e
DS		 4340 if (IS_ERR(new_blob))
4341 return PTR_ERR(new_blob);
d2ed3436
DS		 4342 }
4343
4344 /* This does not need to be synchronised with blob_lock, as the
4345 * get_properties ioctl locks all modesetting objects, and
4346 * obj_holds_id must be locked before calling here, so we cannot
4347 * have its value out of sync with the list membership modified
4348 * below under blob_lock. */
4349 if (obj_holds_id) {
4350 ret = drm_object_property_set_value(obj_holds_id,
4351 prop_holds_id,
4352 new_blob ?
4353 new_blob->base.id : 0);
4354 if (ret != 0)
4355 goto err_created;
4356 }
4357
ec530829 4358 drm_property_unreference_blob(old_blob);
d2ed3436
DS		 4359 *replace = new_blob;
4360
4361 return 0;
4362
4363err_created:
6bcacf51 4364 drm_property_unreference_blob(new_blob);
d2ed3436
DS		 4365 return ret;
4366}
4367
c8e32cc1
DV		 4368/**
4369 * drm_mode_getblob_ioctl - get the contents of a blob property value
4370 * @dev: DRM device
4371 * @data: ioctl data
4372 * @file_priv: DRM file info
4373 *
4374 * This function retrieves the contents of a blob property. The value stored in
4375 * an object's blob property is just a normal modeset object id.
4376 *
4377 * Called by the user via ioctl.
4378 *
4379 * Returns:
1a498633 4380 * Zero on success, negative errno on failure.
c8e32cc1 4381 */
f453ba04
DA		 4382int drm_mode_getblob_ioctl(struct drm_device *dev,
4383 void *data, struct drm_file *file_priv)
4384{
f453ba04
DA		 4385 struct drm_mode_get_blob *out_resp = data;
4386 struct drm_property_blob *blob;
4387 int ret = 0;
81f6c7f8 4388 void __user *blob_ptr;
f453ba04 4389
fb3b06c8
DA		 4390 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4391 return -EINVAL;
4392
84849903 4393 drm_modeset_lock_all(dev);
8fb6e7a5 4394 mutex_lock(&dev->mode_config.blob_lock);
6bcacf51 4395 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
a2b34e22 4396 if (!blob) {
f27657f2 4397 ret = -ENOENT;
f453ba04
DA		 4398 goto done;
4399 }
f453ba04
DA		 4400
4401 if (out_resp->length == blob->length) {
81f6c7f8 4402 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4dfd909f 4403 if (copy_to_user(blob_ptr, blob->data, blob->length)) {
f453ba04
DA		 4404 ret = -EFAULT;
4405 goto done;
4406 }
4407 }
4408 out_resp->length = blob->length;
4409
4410done:
8fb6e7a5 4411 mutex_unlock(&dev->mode_config.blob_lock);
84849903 4412 drm_modeset_unlock_all(dev);
f453ba04
DA		 4413 return ret;
4414}
4415
e2f5d2ea
DS		 4416/**
4417 * drm_mode_createblob_ioctl - create a new blob property
4418 * @dev: DRM device
4419 * @data: ioctl data
4420 * @file_priv: DRM file info
4421 *
4422 * This function creates a new blob property with user-defined values. In order
4423 * to give us sensible validation and checking when creating, rather than at
4424 * every potential use, we also require a type to be provided upfront.
4425 *
4426 * Called by the user via ioctl.
4427 *
4428 * Returns:
4429 * Zero on success, negative errno on failure.
4430 */
4431int drm_mode_createblob_ioctl(struct drm_device *dev,
4432 void *data, struct drm_file *file_priv)
4433{
4434 struct drm_mode_create_blob *out_resp = data;
4435 struct drm_property_blob *blob;
4436 void __user *blob_ptr;
4437 int ret = 0;
4438
4439 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4440 return -EINVAL;
4441
4442 blob = drm_property_create_blob(dev, out_resp->length, NULL);
4443 if (IS_ERR(blob))
4444 return PTR_ERR(blob);
4445
4446 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4447 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) {
4448 ret = -EFAULT;
4449 goto out_blob;
4450 }
4451
4452 /* Dropping the lock between create_blob and our access here is safe
4453 * as only the same file_priv can remove the blob; at this point, it is
4454 * not associated with any file_priv. */
4455 mutex_lock(&dev->mode_config.blob_lock);
4456 out_resp->blob_id = blob->base.id;
4457 list_add_tail(&file_priv->blobs, &blob->head_file);
4458 mutex_unlock(&dev->mode_config.blob_lock);
4459
4460 return 0;
4461
4462out_blob:
4463 drm_property_unreference_blob(blob);
4464 return ret;
4465}
4466
4467/**
4468 * drm_mode_destroyblob_ioctl - destroy a user blob property
4469 * @dev: DRM device
4470 * @data: ioctl data
4471 * @file_priv: DRM file info
4472 *
4473 * Destroy an existing user-defined blob property.
4474 *
4475 * Called by the user via ioctl.
4476 *
4477 * Returns:
4478 * Zero on success, negative errno on failure.
4479 */
4480int drm_mode_destroyblob_ioctl(struct drm_device *dev,
4481 void *data, struct drm_file *file_priv)
4482{
4483 struct drm_mode_destroy_blob *out_resp = data;
4484 struct drm_property_blob *blob = NULL, *bt;
4485 bool found = false;
4486 int ret = 0;
4487
4488 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4489 return -EINVAL;
4490
4491 mutex_lock(&dev->mode_config.blob_lock);
4492 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4493 if (!blob) {
4494 ret = -ENOENT;
4495 goto err;
4496 }
4497
4498 /* Ensure the property was actually created by this user. */
4499 list_for_each_entry(bt, &file_priv->blobs, head_file) {
4500 if (bt == blob) {
4501 found = true;
4502 break;
4503 }
4504 }
4505
4506 if (!found) {
4507 ret = -EPERM;
4508 goto err;
4509 }
4510
4511 /* We must drop head_file here, because we may not be the last
4512 * reference on the blob. */
4513 list_del_init(&blob->head_file);
4514 drm_property_unreference_blob_locked(blob);
4515 mutex_unlock(&dev->mode_config.blob_lock);
4516
4517 return 0;
4518
4519err:
4520 mutex_unlock(&dev->mode_config.blob_lock);
4521 return ret;
4522}
4523
cc7096fb
DA		 4524/**
4525 * drm_mode_connector_set_path_property - set tile property on connector
4526 * @connector: connector to set property on.
d2ed3436 4527 * @path: path to use for property; must not be NULL.
cc7096fb
DA		 4528 *
4529 * This creates a property to expose to userspace to specify a
4530 * connector path. This is mainly used for DisplayPort MST where
4531 * connectors have a topology and we want to allow userspace to give
4532 * them more meaningful names.
4533 *
4534 * Returns:
1a498633 4535 * Zero on success, negative errno on failure.
cc7096fb 4536 */
43aba7eb 4537int drm_mode_connector_set_path_property(struct drm_connector *connector,
12e6cecd 4538 const char *path)
43aba7eb
DA		 4539{
4540 struct drm_device *dev = connector->dev;
ecbbe59b 4541 int ret;
43aba7eb 4542
d2ed3436
DS		 4543 ret = drm_property_replace_global_blob(dev,
4544 &connector->path_blob_ptr,
4545 strlen(path) + 1,
4546 path,
4547 &connector->base,
4548 dev->mode_config.path_property);
43aba7eb
DA		 4549 return ret;
4550}
4551EXPORT_SYMBOL(drm_mode_connector_set_path_property);
4552
6f134d7b
DA		 4553/**
4554 * drm_mode_connector_set_tile_property - set tile property on connector
4555 * @connector: connector to set property on.
4556 *
4557 * This looks up the tile information for a connector, and creates a
4558 * property for userspace to parse if it exists. The property is of
4559 * the form of 8 integers using ':' as a separator.
4560 *
4561 * Returns:
4562 * Zero on success, errno on failure.
4563 */
4564int drm_mode_connector_set_tile_property(struct drm_connector *connector)
4565{
4566 struct drm_device *dev = connector->dev;
6f134d7b 4567 char tile[256];
d2ed3436 4568 int ret;
6f134d7b
DA		 4569
4570 if (!connector->has_tile) {
d2ed3436
DS		 4571 ret = drm_property_replace_global_blob(dev,
4572 &connector->tile_blob_ptr,
4573 0,
4574 NULL,
4575 &connector->base,
4576 dev->mode_config.tile_property);
6f134d7b
DA		 4577 return ret;
4578 }
4579
4580 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
4581 connector->tile_group->id, connector->tile_is_single_monitor,
4582 connector->num_h_tile, connector->num_v_tile,
4583 connector->tile_h_loc, connector->tile_v_loc,
4584 connector->tile_h_size, connector->tile_v_size);
6f134d7b 4585
d2ed3436
DS		 4586 ret = drm_property_replace_global_blob(dev,
4587 &connector->tile_blob_ptr,
4588 strlen(tile) + 1,
4589 tile,
4590 &connector->base,
4591 dev->mode_config.tile_property);
6f134d7b
DA		 4592 return ret;
4593}
4594EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
4595
c8e32cc1
DV		 4596/**
4597 * drm_mode_connector_update_edid_property - update the edid property of a connector
4598 * @connector: drm connector
4599 * @edid: new value of the edid property
4600 *
4601 * This function creates a new blob modeset object and assigns its id to the
4602 * connector's edid property.
4603 *
4604 * Returns:
1a498633 4605 * Zero on success, negative errno on failure.
c8e32cc1 4606 */
f453ba04 4607int drm_mode_connector_update_edid_property(struct drm_connector *connector,
12e6cecd 4608 const struct edid *edid)
f453ba04
DA		 4609{
4610 struct drm_device *dev = connector->dev;
d2ed3436 4611 size_t size = 0;
ecbbe59b 4612 int ret;
f453ba04 4613
4cf2b281
TW		 4614 /* ignore requests to set edid when overridden */
4615 if (connector->override_edid)
4616 return 0;
4617
d2ed3436 4618 if (edid)
e24ff467 4619 size = EDID_LENGTH * (1 + edid->extensions);
f453ba04 4620
d2ed3436
DS		 4621 ret = drm_property_replace_global_blob(dev,
4622 &connector->edid_blob_ptr,
4623 size,
4624 edid,
4625 &connector->base,
4626 dev->mode_config.edid_property);
f453ba04
DA		 4627 return ret;
4628}
4629EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
4630
3843e71f
RC		 4631/* Some properties could refer to dynamic refcnt'd objects, or things that
4632 * need special locking to handle lifetime issues (ie. to ensure the prop
4633 * value doesn't become invalid part way through the property update due to
4634 * race). The value returned by reference via 'obj' should be passed back
4635 * to drm_property_change_valid_put() after the property is set (and the
4636 * object to which the property is attached has a chance to take it's own
4637 * reference).
4638 */
d34f20d6 4639bool drm_property_change_valid_get(struct drm_property *property,
3843e71f 4640 uint64_t value, struct drm_mode_object **ref)
26a34815 4641{
2ca651d1
TR		 4642 int i;
4643
26a34815
PZ		 4644 if (property->flags & DRM_MODE_PROP_IMMUTABLE)
4645 return false;
5ea22f24 4646
3843e71f
RC		 4647 *ref = NULL;
4648
5ea22f24 4649 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
26a34815
PZ		 4650 if (value < property->values[0] || value > property->values[1])
4651 return false;
4652 return true;
ebc44cf3
RC		 4653 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) {
4654 int64_t svalue = U642I64(value);
4dfd909f 4655
ebc44cf3
RC		 4656 if (svalue < U642I64(property->values[0]) ||
4657 svalue > U642I64(property->values[1]))
4658 return false;
4659 return true;
5ea22f24 4660 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
592c20ee 4661 uint64_t valid_mask = 0;
4dfd909f 4662
49e27545
RC		 4663 for (i = 0; i < property->num_values; i++)
4664 valid_mask |= (1ULL << property->values[i]);
4665 return !(value & ~valid_mask);
5ea22f24 4666 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
6bcacf51
DS		 4667 struct drm_property_blob *blob;
4668
4669 if (value == 0)
4670 return true;
4671
4672 blob = drm_property_lookup_blob(property->dev, value);
4673 if (blob) {
4674 *ref = &blob->base;
4675 return true;
4676 } else {
4677 return false;
4678 }
98f75de4 4679 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
98f75de4
RC		 4680 /* a zero value for an object property translates to null: */
4681 if (value == 0)
4682 return true;
3843e71f
RC		 4683
4684 /* handle refcnt'd objects specially: */
4685 if (property->values[0] == DRM_MODE_OBJECT_FB) {
4686 struct drm_framebuffer *fb;
4687 fb = drm_framebuffer_lookup(property->dev, value);
4688 if (fb) {
4689 *ref = &fb->base;
4690 return true;
4691 } else {
4692 return false;
4693 }
4694 } else {
4695 return _object_find(property->dev, value, property->values[0]) != NULL;
4696 }
26a34815 4697 }
2ca651d1
TR		 4698
4699 for (i = 0; i < property->num_values; i++)
4700 if (property->values[i] == value)
4701 return true;
4702 return false;
26a34815
PZ		 4703}
4704
d34f20d6 4705void drm_property_change_valid_put(struct drm_property *property,
3843e71f
RC		 4706 struct drm_mode_object *ref)
4707{
4708 if (!ref)
4709 return;
4710
4711 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4712 if (property->values[0] == DRM_MODE_OBJECT_FB)
4713 drm_framebuffer_unreference(obj_to_fb(ref));
da9b2a38
DS		 4714 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4715 drm_property_unreference_blob(obj_to_blob(ref));
3843e71f
RC		 4716}
4717
c8e32cc1
DV		 4718/**
4719 * drm_mode_connector_property_set_ioctl - set the current value of a connector property
4720 * @dev: DRM device
4721 * @data: ioctl data
4722 * @file_priv: DRM file info
4723 *
4724 * This function sets the current value for a connectors's property. It also
4725 * calls into a driver's ->set_property callback to update the hardware state
4726 *
4727 * Called by the user via ioctl.
4728 *
4729 * Returns:
1a498633 4730 * Zero on success, negative errno on failure.
c8e32cc1 4731 */
f453ba04
DA		 4732int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
4733 void *data, struct drm_file *file_priv)
4734{
0057d8dd
PZ		 4735 struct drm_mode_connector_set_property *conn_set_prop = data;
4736 struct drm_mode_obj_set_property obj_set_prop = {
4737 .value = conn_set_prop->value,
4738 .prop_id = conn_set_prop->prop_id,
4739 .obj_id = conn_set_prop->connector_id,
4740 .obj_type = DRM_MODE_OBJECT_CONNECTOR
4741 };
fb3b06c8 4742
0057d8dd
PZ		 4743 /* It does all the locking and checking we need */
4744 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
f453ba04
DA		 4745}
4746
c543188a
PZ		 4747static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
4748 struct drm_property *property,
4749 uint64_t value)
4750{
4751 int ret = -EINVAL;
4752 struct drm_connector *connector = obj_to_connector(obj);
4753
4754 /* Do DPMS ourselves */
4755 if (property == connector->dev->mode_config.dpms_property) {
c543188a 4756 ret = 0;
9a69a9ac
ML		 4757 if (connector->funcs->dpms)
4758 ret = (*connector->funcs->dpms)(connector, (int)value);
c543188a
PZ		 4759 } else if (connector->funcs->set_property)
4760 ret = connector->funcs->set_property(connector, property, value);
4761
4762 /* store the property value if successful */
4763 if (!ret)
58495563 4764 drm_object_property_set_value(&connector->base, property, value);
c543188a
PZ		 4765 return ret;
4766}
4767
bffd9de0
PZ		 4768static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
4769 struct drm_property *property,
4770 uint64_t value)
4771{
4772 int ret = -EINVAL;
4773 struct drm_crtc *crtc = obj_to_crtc(obj);
4774
4775 if (crtc->funcs->set_property)
4776 ret = crtc->funcs->set_property(crtc, property, value);
4777 if (!ret)
4778 drm_object_property_set_value(obj, property, value);
4779
4780 return ret;
4781}
4782
3a5f87c2
TW		 4783/**
4784 * drm_mode_plane_set_obj_prop - set the value of a property
4785 * @plane: drm plane object to set property value for
4786 * @property: property to set
4787 * @value: value the property should be set to
4788 *
4789 * This functions sets a given property on a given plane object. This function
4790 * calls the driver's ->set_property callback and changes the software state of
4791 * the property if the callback succeeds.
4792 *
4793 * Returns:
4794 * Zero on success, error code on failure.
4795 */
4796int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
4797 struct drm_property *property,
4798 uint64_t value)
4d93914a
RC		 4799{
4800 int ret = -EINVAL;
3a5f87c2 4801 struct drm_mode_object *obj = &plane->base;
4d93914a
RC		 4802
4803 if (plane->funcs->set_property)
4804 ret = plane->funcs->set_property(plane, property, value);
4805 if (!ret)
4806 drm_object_property_set_value(obj, property, value);
4807
4808 return ret;
4809}
3a5f87c2 4810EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
4d93914a 4811
c8e32cc1 4812/**
1a498633 4813 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
c8e32cc1
DV		 4814 * @dev: DRM device
4815 * @data: ioctl data
4816 * @file_priv: DRM file info
4817 *
4818 * This function retrieves the current value for an object's property. Compared
4819 * to the connector specific ioctl this one is extended to also work on crtc and
4820 * plane objects.
4821 *
4822 * Called by the user via ioctl.
4823 *
4824 * Returns:
1a498633 4825 * Zero on success, negative errno on failure.
c8e32cc1 4826 */
c543188a
PZ		 4827int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
4828 struct drm_file *file_priv)
4829{
4830 struct drm_mode_obj_get_properties *arg = data;
4831 struct drm_mode_object *obj;
4832 int ret = 0;
c543188a
PZ		 4833
4834 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4835 return -EINVAL;
4836
84849903 4837 drm_modeset_lock_all(dev);
c543188a
PZ		 4838
4839 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
4840 if (!obj) {
f27657f2 4841 ret = -ENOENT;
c543188a
PZ		 4842 goto out;
4843 }
4844 if (!obj->properties) {
4845 ret = -EINVAL;
4846 goto out;
4847 }
4848
88a48e29 4849 ret = get_properties(obj, file_priv->atomic,
95cbf110
RC		 4850 (uint32_t __user *)(unsigned long)(arg->props_ptr),
4851 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
4852 &arg->count_props);
c543188a 4853
c543188a 4854out:
84849903 4855 drm_modeset_unlock_all(dev);
c543188a
PZ		 4856 return ret;
4857}
4858
c8e32cc1
DV		 4859/**
4860 * drm_mode_obj_set_property_ioctl - set the current value of an object's property
4861 * @dev: DRM device
4862 * @data: ioctl data
4863 * @file_priv: DRM file info
4864 *
4865 * This function sets the current value for an object's property. It also calls
4866 * into a driver's ->set_property callback to update the hardware state.
4867 * Compared to the connector specific ioctl this one is extended to also work on
4868 * crtc and plane objects.
4869 *
4870 * Called by the user via ioctl.
4871 *
4872 * Returns:
1a498633 4873 * Zero on success, negative errno on failure.
c8e32cc1 4874 */
c543188a
PZ		 4875int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
4876 struct drm_file *file_priv)
4877{
4878 struct drm_mode_obj_set_property *arg = data;
4879 struct drm_mode_object *arg_obj;
4880 struct drm_mode_object *prop_obj;
4881 struct drm_property *property;
3843e71f
RC		 4882 int i, ret = -EINVAL;
4883 struct drm_mode_object *ref;
c543188a
PZ		 4884
4885 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4886 return -EINVAL;
4887
84849903 4888 drm_modeset_lock_all(dev);
c543188a
PZ		 4889
4890 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
f27657f2
VS		 4891 if (!arg_obj) {
4892 ret = -ENOENT;
c543188a 4893 goto out;
f27657f2 4894 }
c543188a
PZ		 4895 if (!arg_obj->properties)
4896 goto out;
4897
7f88a9be 4898 for (i = 0; i < arg_obj->properties->count; i++)
b17cd757 4899 if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
c543188a
PZ		 4900 break;
4901
7f88a9be 4902 if (i == arg_obj->properties->count)
c543188a
PZ		 4903 goto out;
4904
4905 prop_obj = drm_mode_object_find(dev, arg->prop_id,
4906 DRM_MODE_OBJECT_PROPERTY);
f27657f2
VS		 4907 if (!prop_obj) {
4908 ret = -ENOENT;
c543188a 4909 goto out;
f27657f2 4910 }
c543188a
PZ		 4911 property = obj_to_property(prop_obj);
4912
3843e71f 4913 if (!drm_property_change_valid_get(property, arg->value, &ref))
c543188a
PZ		 4914 goto out;
4915
4916 switch (arg_obj->type) {
4917 case DRM_MODE_OBJECT_CONNECTOR:
4918 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
4919 arg->value);
4920 break;
bffd9de0
PZ		 4921 case DRM_MODE_OBJECT_CRTC:
4922 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
4923 break;
4d93914a 4924 case DRM_MODE_OBJECT_PLANE:
3a5f87c2
TW		 4925 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
4926 property, arg->value);
4d93914a 4927 break;
c543188a
PZ		 4928 }
4929
3843e71f
RC		 4930 drm_property_change_valid_put(property, ref);
4931
c543188a 4932out:
84849903 4933 drm_modeset_unlock_all(dev);
c543188a
PZ		 4934 return ret;
4935}
4936
c8e32cc1
DV		 4937/**
4938 * drm_mode_connector_attach_encoder - attach a connector to an encoder
4939 * @connector: connector to attach
4940 * @encoder: encoder to attach @connector to
4941 *
4942 * This function links up a connector to an encoder. Note that the routing
4943 * restrictions between encoders and crtcs are exposed to userspace through the
4944 * possible_clones and possible_crtcs bitmasks.
4945 *
4946 * Returns:
1a498633 4947 * Zero on success, negative errno on failure.
c8e32cc1 4948 */
f453ba04
DA		 4949int drm_mode_connector_attach_encoder(struct drm_connector *connector,
4950 struct drm_encoder *encoder)
4951{
4952 int i;
4953
4954 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
4955 if (connector->encoder_ids[i] == 0) {
4956 connector->encoder_ids[i] = encoder->base.id;
4957 return 0;
4958 }
4959 }
4960 return -ENOMEM;
4961}
4962EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
4963
c8e32cc1
DV		 4964/**
4965 * drm_mode_crtc_set_gamma_size - set the gamma table size
4966 * @crtc: CRTC to set the gamma table size for
4967 * @gamma_size: size of the gamma table
4968 *
4969 * Drivers which support gamma tables should set this to the supported gamma
4970 * table size when initializing the CRTC. Currently the drm core only supports a
4971 * fixed gamma table size.
4972 *
4973 * Returns:
1a498633 4974 * Zero on success, negative errno on failure.
c8e32cc1 4975 */
4cae5b84 4976int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
c8e32cc1 4977 int gamma_size)
f453ba04
DA		 4978{
4979 crtc->gamma_size = gamma_size;
4980
bd3f0ff9
TR		 4981 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3,
4982 GFP_KERNEL);
f453ba04
DA		 4983 if (!crtc->gamma_store) {
4984 crtc->gamma_size = 0;
4cae5b84 4985 return -ENOMEM;
f453ba04
DA		 4986 }
4987
4cae5b84 4988 return 0;
f453ba04
DA		 4989}
4990EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
4991
c8e32cc1
DV		 4992/**
4993 * drm_mode_gamma_set_ioctl - set the gamma table
4994 * @dev: DRM device
4995 * @data: ioctl data
4996 * @file_priv: DRM file info
4997 *
4998 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
4999 * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
5000 *
5001 * Called by the user via ioctl.
5002 *
5003 * Returns:
1a498633 5004 * Zero on success, negative errno on failure.
c8e32cc1 5005 */
f453ba04
DA		 5006int drm_mode_gamma_set_ioctl(struct drm_device *dev,
5007 void *data, struct drm_file *file_priv)
5008{
5009 struct drm_mode_crtc_lut *crtc_lut = data;
f453ba04
DA		 5010 struct drm_crtc *crtc;
5011 void *r_base, *g_base, *b_base;
5012 int size;
5013 int ret = 0;
5014
fb3b06c8
DA		 5015 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5016 return -EINVAL;
5017
84849903 5018 drm_modeset_lock_all(dev);
a2b34e22
RC		 5019 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5020 if (!crtc) {
f27657f2 5021 ret = -ENOENT;
f453ba04
DA		 5022 goto out;
5023 }
f453ba04 5024
ebe0f244
LP		 5025 if (crtc->funcs->gamma_set == NULL) {
5026 ret = -ENOSYS;
5027 goto out;
5028 }
5029
f453ba04
DA		 5030 /* memcpy into gamma store */
5031 if (crtc_lut->gamma_size != crtc->gamma_size) {
5032 ret = -EINVAL;
5033 goto out;
5034 }
5035
5036 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5037 r_base = crtc->gamma_store;
5038 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
5039 ret = -EFAULT;
5040 goto out;
5041 }
5042
5043 g_base = r_base + size;
5044 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
5045 ret = -EFAULT;
5046 goto out;
5047 }
5048
5049 b_base = g_base + size;
5050 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
5051 ret = -EFAULT;
5052 goto out;
5053 }
5054
7203425a 5055 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
f453ba04
DA		 5056
5057out:
84849903 5058 drm_modeset_unlock_all(dev);
f453ba04
DA		 5059 return ret;
5060
5061}
5062
c8e32cc1
DV		 5063/**
5064 * drm_mode_gamma_get_ioctl - get the gamma table
5065 * @dev: DRM device
5066 * @data: ioctl data
5067 * @file_priv: DRM file info
5068 *
5069 * Copy the current gamma table into the storage provided. This also provides
5070 * the gamma table size the driver expects, which can be used to size the
5071 * allocated storage.
5072 *
5073 * Called by the user via ioctl.
5074 *
5075 * Returns:
1a498633 5076 * Zero on success, negative errno on failure.
c8e32cc1 5077 */
f453ba04
DA		 5078int drm_mode_gamma_get_ioctl(struct drm_device *dev,
5079 void *data, struct drm_file *file_priv)
5080{
5081 struct drm_mode_crtc_lut *crtc_lut = data;
f453ba04
DA		 5082 struct drm_crtc *crtc;
5083 void *r_base, *g_base, *b_base;
5084 int size;
5085 int ret = 0;
5086
fb3b06c8
DA		 5087 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5088 return -EINVAL;
5089
84849903 5090 drm_modeset_lock_all(dev);
a2b34e22
RC		 5091 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5092 if (!crtc) {
f27657f2 5093 ret = -ENOENT;
f453ba04
DA		 5094 goto out;
5095 }
f453ba04
DA		 5096
5097 /* memcpy into gamma store */
5098 if (crtc_lut->gamma_size != crtc->gamma_size) {
5099 ret = -EINVAL;
5100 goto out;
5101 }
5102
5103 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5104 r_base = crtc->gamma_store;
5105 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
5106 ret = -EFAULT;
5107 goto out;
5108 }
5109
5110 g_base = r_base + size;
5111 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
5112 ret = -EFAULT;
5113 goto out;
5114 }
5115
5116 b_base = g_base + size;
5117 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
5118 ret = -EFAULT;
5119 goto out;
5120 }
5121out:
84849903 5122 drm_modeset_unlock_all(dev);
f453ba04
DA		 5123 return ret;
5124}
d91d8a3f 5125
c8e32cc1
DV		 5126/**
5127 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
5128 * @dev: DRM device
5129 * @data: ioctl data
5130 * @file_priv: DRM file info
5131 *
5132 * This schedules an asynchronous update on a given CRTC, called page flip.
5133 * Optionally a drm event is generated to signal the completion of the event.
5134 * Generic drivers cannot assume that a pageflip with changed framebuffer
5135 * properties (including driver specific metadata like tiling layout) will work,
5136 * but some drivers support e.g. pixel format changes through the pageflip
5137 * ioctl.
5138 *
5139 * Called by the user via ioctl.
5140 *
5141 * Returns:
1a498633 5142 * Zero on success, negative errno on failure.
c8e32cc1 5143 */
d91d8a3f
KH		 5144int drm_mode_page_flip_ioctl(struct drm_device *dev,
5145 void *data, struct drm_file *file_priv)
5146{
5147 struct drm_mode_crtc_page_flip *page_flip = data;
d91d8a3f 5148 struct drm_crtc *crtc;
3d30a59b 5149 struct drm_framebuffer *fb = NULL;
d91d8a3f
KH		 5150 struct drm_pending_vblank_event *e = NULL;
5151 unsigned long flags;
5152 int ret = -EINVAL;
5153
5154 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
5155 page_flip->reserved != 0)
5156 return -EINVAL;
5157
62f2104f
KP		 5158 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
5159 return -EINVAL;
5160
a2b34e22
RC		 5161 crtc = drm_crtc_find(dev, page_flip->crtc_id);
5162 if (!crtc)
f27657f2 5163 return -ENOENT;
d91d8a3f 5164
4d02e2de 5165 drm_modeset_lock_crtc(crtc, crtc->primary);
f4510a27 5166 if (crtc->primary->fb == NULL) {
90c1efdd
CW		 5167 /* The framebuffer is currently unbound, presumably
5168 * due to a hotplug event, that userspace has not
5169 * yet discovered.
5170 */
5171 ret = -EBUSY;
5172 goto out;
5173 }
5174
d91d8a3f
KH		 5175 if (crtc->funcs->page_flip == NULL)
5176 goto out;
5177
786b99ed 5178 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
37c4e705
VS		 5179 if (!fb) {
5180 ret = -ENOENT;
d91d8a3f 5181 goto out;
37c4e705 5182 }
d91d8a3f 5183
c11e9283
DL		 5184 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
5185 if (ret)
5f61bb42 5186 goto out;
5f61bb42 5187
f4510a27 5188 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
909d9cda
LP		 5189 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
5190 ret = -EINVAL;
5191 goto out;
5192 }
5193
d91d8a3f
KH		 5194 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5195 ret = -ENOMEM;
5196 spin_lock_irqsave(&dev->event_lock, flags);
f76511b9 5197 if (file_priv->event_space < sizeof(e->event)) {
d91d8a3f
KH		 5198 spin_unlock_irqrestore(&dev->event_lock, flags);
5199 goto out;
5200 }
f76511b9 5201 file_priv->event_space -= sizeof(e->event);
d91d8a3f
KH		 5202 spin_unlock_irqrestore(&dev->event_lock, flags);
5203
f76511b9 5204 e = kzalloc(sizeof(*e), GFP_KERNEL);
d91d8a3f
KH		 5205 if (e == NULL) {
5206 spin_lock_irqsave(&dev->event_lock, flags);
f76511b9 5207 file_priv->event_space += sizeof(e->event);
d91d8a3f
KH		 5208 spin_unlock_irqrestore(&dev->event_lock, flags);
5209 goto out;
5210 }
5211
7bd4d7be 5212 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
f76511b9 5213 e->event.base.length = sizeof(e->event);
d91d8a3f
KH		 5214 e->event.user_data = page_flip->user_data;
5215 e->base.event = &e->event.base;
5216 e->base.file_priv = file_priv;
5217 e->base.destroy =
5218 (void (*) (struct drm_pending_event *)) kfree;
5219 }
5220
3d30a59b 5221 crtc->primary->old_fb = crtc->primary->fb;
ed8d1975 5222 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
d91d8a3f 5223 if (ret) {
aef6a7ee
JS		 5224 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5225 spin_lock_irqsave(&dev->event_lock, flags);
f76511b9 5226 file_priv->event_space += sizeof(e->event);
aef6a7ee
JS		 5227 spin_unlock_irqrestore(&dev->event_lock, flags);
5228 kfree(e);
5229 }
b0d12325 5230 /* Keep the old fb, don't unref it. */
3d30a59b 5231 crtc->primary->old_fb = NULL;
b0d12325 5232 } else {
3cb43cc0 5233 crtc->primary->fb = fb;
b0d12325
DV		 5234 /* Unref only the old framebuffer. */
5235 fb = NULL;
d91d8a3f
KH		 5236 }
5237
5238out:
b0d12325
DV		 5239 if (fb)
5240 drm_framebuffer_unreference(fb);
3d30a59b
DV		 5241 if (crtc->primary->old_fb)
5242 drm_framebuffer_unreference(crtc->primary->old_fb);
5243 crtc->primary->old_fb = NULL;
d059f652 5244 drm_modeset_unlock_crtc(crtc);
b4d5e7d1 5245
d91d8a3f
KH		 5246 return ret;
5247}
eb033556 5248
c8e32cc1
DV		 5249/**
5250 * drm_mode_config_reset - call ->reset callbacks
5251 * @dev: drm device
5252 *
5253 * This functions calls all the crtc's, encoder's and connector's ->reset
5254 * callback. Drivers can use this in e.g. their driver load or resume code to
5255 * reset hardware and software state.
5256 */
eb033556
CW		 5257void drm_mode_config_reset(struct drm_device *dev)
5258{
5259 struct drm_crtc *crtc;
2a0d7cfd 5260 struct drm_plane *plane;
eb033556
CW		 5261 struct drm_encoder *encoder;
5262 struct drm_connector *connector;
5263
e4f62546 5264 drm_for_each_plane(plane, dev)
2a0d7cfd
DV		 5265 if (plane->funcs->reset)
5266 plane->funcs->reset(plane);
5267
e4f62546 5268 drm_for_each_crtc(crtc, dev)
eb033556
CW		 5269 if (crtc->funcs->reset)
5270 crtc->funcs->reset(crtc);
5271
e4f62546 5272 drm_for_each_encoder(encoder, dev)
eb033556
CW		 5273 if (encoder->funcs->reset)
5274 encoder->funcs->reset(encoder);
5275
f8c2ba31 5276 mutex_lock(&dev->mode_config.mutex);
4eebf60b 5277 drm_for_each_connector(connector, dev)
eb033556
CW		 5278 if (connector->funcs->reset)
5279 connector->funcs->reset(connector);
f8c2ba31 5280 mutex_unlock(&dev->mode_config.mutex);
eb033556
CW		 5281}
5282EXPORT_SYMBOL(drm_mode_config_reset);
ff72145b 5283
c8e32cc1
DV		 5284/**
5285 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
5286 * @dev: DRM device
5287 * @data: ioctl data
5288 * @file_priv: DRM file info
5289 *
5290 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
5291 * TTM or something else entirely) and returns the resulting buffer handle. This
5292 * handle can then be wrapped up into a framebuffer modeset object.
5293 *
5294 * Note that userspace is not allowed to use such objects for render
5295 * acceleration - drivers must create their own private ioctls for such a use
5296 * case.
5297 *
5298 * Called by the user via ioctl.
5299 *
5300 * Returns:
1a498633 5301 * Zero on success, negative errno on failure.
c8e32cc1 5302 */
ff72145b
DA		 5303int drm_mode_create_dumb_ioctl(struct drm_device *dev,
5304 void *data, struct drm_file *file_priv)
5305{
5306 struct drm_mode_create_dumb *args = data;
b28cd41f 5307 u32 cpp, stride, size;
ff72145b
DA		 5308
5309 if (!dev->driver->dumb_create)
5310 return -ENOSYS;
b28cd41f
DH		 5311 if (!args->width || !args->height || !args->bpp)
5312 return -EINVAL;
5313
5314 /* overflow checks for 32bit size calculations */
00e72089 5315 /* NOTE: DIV_ROUND_UP() can overflow */
b28cd41f 5316 cpp = DIV_ROUND_UP(args->bpp, 8);
00e72089 5317 if (!cpp || cpp > 0xffffffffU / args->width)
b28cd41f
DH		 5318 return -EINVAL;
5319 stride = cpp * args->width;
5320 if (args->height > 0xffffffffU / stride)
5321 return -EINVAL;
5322
5323 /* test for wrap-around */
5324 size = args->height * stride;
5325 if (PAGE_ALIGN(size) == 0)
5326 return -EINVAL;
5327
f6085952
TR		 5328 /*
5329 * handle, pitch and size are output parameters. Zero them out to
5330 * prevent drivers from accidentally using uninitialized data. Since
5331 * not all existing userspace is clearing these fields properly we
5332 * cannot reject IOCTL with garbage in them.
5333 */
5334 args->handle = 0;
5335 args->pitch = 0;
5336 args->size = 0;
5337
ff72145b
DA		 5338 return dev->driver->dumb_create(file_priv, dev, args);
5339}
5340
c8e32cc1
DV		 5341/**
5342 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
5343 * @dev: DRM device
5344 * @data: ioctl data
5345 * @file_priv: DRM file info
5346 *
5347 * Allocate an offset in the drm device node's address space to be able to
5348 * memory map a dumb buffer.
5349 *
5350 * Called by the user via ioctl.
5351 *
5352 * Returns:
1a498633 5353 * Zero on success, negative errno on failure.
c8e32cc1 5354 */
ff72145b
DA		 5355int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
5356 void *data, struct drm_file *file_priv)
5357{
5358 struct drm_mode_map_dumb *args = data;
5359
5360 /* call driver ioctl to get mmap offset */
5361 if (!dev->driver->dumb_map_offset)
5362 return -ENOSYS;
5363
5364 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
5365}
5366
c8e32cc1
DV		 5367/**
5368 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
5369 * @dev: DRM device
5370 * @data: ioctl data
5371 * @file_priv: DRM file info
5372 *
5373 * This destroys the userspace handle for the given dumb backing storage buffer.
5374 * Since buffer objects must be reference counted in the kernel a buffer object
5375 * won't be immediately freed if a framebuffer modeset object still uses it.
5376 *
5377 * Called by the user via ioctl.
5378 *
5379 * Returns:
1a498633 5380 * Zero on success, negative errno on failure.
c8e32cc1 5381 */
ff72145b
DA		 5382int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
5383 void *data, struct drm_file *file_priv)
5384{
5385 struct drm_mode_destroy_dumb *args = data;
5386
5387 if (!dev->driver->dumb_destroy)
5388 return -ENOSYS;
5389
5390 return dev->driver->dumb_destroy(file_priv, dev, args->handle);
5391}
248dbc23 5392
c8e32cc1
DV		 5393/**
5394 * drm_fb_get_bpp_depth - get the bpp/depth values for format
5395 * @format: pixel format (DRM_FORMAT_*)
5396 * @depth: storage for the depth value
5397 * @bpp: storage for the bpp value
5398 *
5399 * This only supports RGB formats here for compat with code that doesn't use
5400 * pixel formats directly yet.
248dbc23
DA		 5401 */
5402void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
5403 int *bpp)
5404{
5405 switch (format) {
c51a6bc5 5406 case DRM_FORMAT_C8:
04b3924d
VS		 5407 case DRM_FORMAT_RGB332:
5408 case DRM_FORMAT_BGR233:
248dbc23
DA		 5409 *depth = 8;
5410 *bpp = 8;
5411 break;
04b3924d
VS		 5412 case DRM_FORMAT_XRGB1555:
5413 case DRM_FORMAT_XBGR1555:
5414 case DRM_FORMAT_RGBX5551:
5415 case DRM_FORMAT_BGRX5551:
5416 case DRM_FORMAT_ARGB1555:
5417 case DRM_FORMAT_ABGR1555:
5418 case DRM_FORMAT_RGBA5551:
5419 case DRM_FORMAT_BGRA5551:
248dbc23
DA		 5420 *depth = 15;
5421 *bpp = 16;
5422 break;
04b3924d
VS		 5423 case DRM_FORMAT_RGB565:
5424 case DRM_FORMAT_BGR565:
248dbc23
DA		 5425 *depth = 16;
5426 *bpp = 16;
5427 break;
04b3924d
VS		 5428 case DRM_FORMAT_RGB888:
5429 case DRM_FORMAT_BGR888:
5430 *depth = 24;
5431 *bpp = 24;
5432 break;
5433 case DRM_FORMAT_XRGB8888:
5434 case DRM_FORMAT_XBGR8888:
5435 case DRM_FORMAT_RGBX8888:
5436 case DRM_FORMAT_BGRX8888:
248dbc23
DA		 5437 *depth = 24;
5438 *bpp = 32;
5439 break;
04b3924d
VS		 5440 case DRM_FORMAT_XRGB2101010:
5441 case DRM_FORMAT_XBGR2101010:
5442 case DRM_FORMAT_RGBX1010102:
5443 case DRM_FORMAT_BGRX1010102:
5444 case DRM_FORMAT_ARGB2101010:
5445 case DRM_FORMAT_ABGR2101010:
5446 case DRM_FORMAT_RGBA1010102:
5447 case DRM_FORMAT_BGRA1010102:
248dbc23
DA		 5448 *depth = 30;
5449 *bpp = 32;
5450 break;
04b3924d
VS		 5451 case DRM_FORMAT_ARGB8888:
5452 case DRM_FORMAT_ABGR8888:
5453 case DRM_FORMAT_RGBA8888:
5454 case DRM_FORMAT_BGRA8888:
248dbc23
DA		 5455 *depth = 32;
5456 *bpp = 32;
5457 break;
5458 default:
23c453a4
VS		 5459 DRM_DEBUG_KMS("unsupported pixel format %s\n",
5460 drm_get_format_name(format));
248dbc23
DA		 5461 *depth = 0;
5462 *bpp = 0;
5463 break;
5464 }
5465}
5466EXPORT_SYMBOL(drm_fb_get_bpp_depth);
141670e9
VS		 5467
5468/**
5469 * drm_format_num_planes - get the number of planes for format
5470 * @format: pixel format (DRM_FORMAT_*)
5471 *
c8e32cc1 5472 * Returns:
141670e9
VS		 5473 * The number of planes used by the specified pixel format.
5474 */
5475int drm_format_num_planes(uint32_t format)
5476{
5477 switch (format) {
5478 case DRM_FORMAT_YUV410:
5479 case DRM_FORMAT_YVU410:
5480 case DRM_FORMAT_YUV411:
5481 case DRM_FORMAT_YVU411:
5482 case DRM_FORMAT_YUV420:
5483 case DRM_FORMAT_YVU420:
5484 case DRM_FORMAT_YUV422:
5485 case DRM_FORMAT_YVU422:
5486 case DRM_FORMAT_YUV444:
5487 case DRM_FORMAT_YVU444:
5488 return 3;
5489 case DRM_FORMAT_NV12:
5490 case DRM_FORMAT_NV21:
5491 case DRM_FORMAT_NV16:
5492 case DRM_FORMAT_NV61:
ba623f6a
LP		 5493 case DRM_FORMAT_NV24:
5494 case DRM_FORMAT_NV42:
141670e9
VS		 5495 return 2;
5496 default:
5497 return 1;
5498 }
5499}
5500EXPORT_SYMBOL(drm_format_num_planes);
5a86bd55
VS		 5501
5502/**
5503 * drm_format_plane_cpp - determine the bytes per pixel value
5504 * @format: pixel format (DRM_FORMAT_*)
5505 * @plane: plane index
5506 *
c8e32cc1 5507 * Returns:
5a86bd55
VS		 5508 * The bytes per pixel value for the specified plane.
5509 */
5510int drm_format_plane_cpp(uint32_t format, int plane)
5511{
5512 unsigned int depth;
5513 int bpp;
5514
5515 if (plane >= drm_format_num_planes(format))
5516 return 0;
5517
5518 switch (format) {
5519 case DRM_FORMAT_YUYV:
5520 case DRM_FORMAT_YVYU:
5521 case DRM_FORMAT_UYVY:
5522 case DRM_FORMAT_VYUY:
5523 return 2;
5524 case DRM_FORMAT_NV12:
5525 case DRM_FORMAT_NV21:
5526 case DRM_FORMAT_NV16:
5527 case DRM_FORMAT_NV61:
ba623f6a
LP		 5528 case DRM_FORMAT_NV24:
5529 case DRM_FORMAT_NV42:
5a86bd55
VS		 5530 return plane ? 2 : 1;
5531 case DRM_FORMAT_YUV410:
5532 case DRM_FORMAT_YVU410:
5533 case DRM_FORMAT_YUV411:
5534 case DRM_FORMAT_YVU411:
5535 case DRM_FORMAT_YUV420:
5536 case DRM_FORMAT_YVU420:
5537 case DRM_FORMAT_YUV422:
5538 case DRM_FORMAT_YVU422:
5539 case DRM_FORMAT_YUV444:
5540 case DRM_FORMAT_YVU444:
5541 return 1;
5542 default:
5543 drm_fb_get_bpp_depth(format, &depth, &bpp);
5544 return bpp >> 3;
5545 }
5546}
5547EXPORT_SYMBOL(drm_format_plane_cpp);
01b68b04
VS		 5548
5549/**
5550 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
5551 * @format: pixel format (DRM_FORMAT_*)
5552 *
c8e32cc1 5553 * Returns:
01b68b04
VS		 5554 * The horizontal chroma subsampling factor for the
5555 * specified pixel format.
5556 */
5557int drm_format_horz_chroma_subsampling(uint32_t format)
5558{
5559 switch (format) {
5560 case DRM_FORMAT_YUV411:
5561 case DRM_FORMAT_YVU411:
5562 case DRM_FORMAT_YUV410:
5563 case DRM_FORMAT_YVU410:
5564 return 4;
5565 case DRM_FORMAT_YUYV:
5566 case DRM_FORMAT_YVYU:
5567 case DRM_FORMAT_UYVY:
5568 case DRM_FORMAT_VYUY:
5569 case DRM_FORMAT_NV12:
5570 case DRM_FORMAT_NV21:
5571 case DRM_FORMAT_NV16:
5572 case DRM_FORMAT_NV61:
5573 case DRM_FORMAT_YUV422:
5574 case DRM_FORMAT_YVU422:
5575 case DRM_FORMAT_YUV420:
5576 case DRM_FORMAT_YVU420:
5577 return 2;
5578 default:
5579 return 1;
5580 }
5581}
5582EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
5583
5584/**
5585 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
5586 * @format: pixel format (DRM_FORMAT_*)
5587 *
c8e32cc1 5588 * Returns:
01b68b04
VS		 5589 * The vertical chroma subsampling factor for the
5590 * specified pixel format.
5591 */
5592int drm_format_vert_chroma_subsampling(uint32_t format)
5593{
5594 switch (format) {
5595 case DRM_FORMAT_YUV410:
5596 case DRM_FORMAT_YVU410:
5597 return 4;
5598 case DRM_FORMAT_YUV420:
5599 case DRM_FORMAT_YVU420:
5600 case DRM_FORMAT_NV12:
5601 case DRM_FORMAT_NV21:
5602 return 2;
5603 default:
5604 return 1;
5605 }
5606}
5607EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
87d24fc3 5608
3c9855f6
VS		 5609/**
5610 * drm_rotation_simplify() - Try to simplify the rotation
5611 * @rotation: Rotation to be simplified
5612 * @supported_rotations: Supported rotations
5613 *
5614 * Attempt to simplify the rotation to a form that is supported.
5615 * Eg. if the hardware supports everything except DRM_REFLECT_X
5616 * one could call this function like this:
5617 *
5618 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) |
5619 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) |
5620 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y));
5621 *
5622 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of
5623 * transforms the hardware supports, this function may not
5624 * be able to produce a supported transform, so the caller should
5625 * check the result afterwards.
5626 */
5627unsigned int drm_rotation_simplify(unsigned int rotation,
5628 unsigned int supported_rotations)
5629{
5630 if (rotation & ~supported_rotations) {
5631 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y);
5632 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4);
5633 }
5634
5635 return rotation;
5636}
5637EXPORT_SYMBOL(drm_rotation_simplify);
5638
87d24fc3
LP		 5639/**
5640 * drm_mode_config_init - initialize DRM mode_configuration structure
5641 * @dev: DRM device
5642 *
5643 * Initialize @dev's mode_config structure, used for tracking the graphics
5644 * configuration of @dev.
5645 *
5646 * Since this initializes the modeset locks, no locking is possible. Which is no
5647 * problem, since this should happen single threaded at init time. It is the
5648 * driver's problem to ensure this guarantee.
5649 *
5650 */
5651void drm_mode_config_init(struct drm_device *dev)
5652{
5653 mutex_init(&dev->mode_config.mutex);
51fd371b 5654 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
87d24fc3
LP		 5655 mutex_init(&dev->mode_config.idr_mutex);
5656 mutex_init(&dev->mode_config.fb_lock);
8fb6e7a5 5657 mutex_init(&dev->mode_config.blob_lock);
87d24fc3
LP		 5658 INIT_LIST_HEAD(&dev->mode_config.fb_list);
5659 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
5660 INIT_LIST_HEAD(&dev->mode_config.connector_list);
5661 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
5662 INIT_LIST_HEAD(&dev->mode_config.property_list);
5663 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
5664 INIT_LIST_HEAD(&dev->mode_config.plane_list);
5665 idr_init(&dev->mode_config.crtc_idr);
138f9ebb 5666 idr_init(&dev->mode_config.tile_idr);
87d24fc3
LP		 5667
5668 drm_modeset_lock_all(dev);
6b4959f4 5669 drm_mode_create_standard_properties(dev);
87d24fc3
LP		 5670 drm_modeset_unlock_all(dev);
5671
5672 /* Just to be sure */
5673 dev->mode_config.num_fb = 0;
5674 dev->mode_config.num_connector = 0;
5675 dev->mode_config.num_crtc = 0;
5676 dev->mode_config.num_encoder = 0;
e27dde3e
MR		 5677 dev->mode_config.num_overlay_plane = 0;
5678 dev->mode_config.num_total_plane = 0;
87d24fc3
LP		 5679}
5680EXPORT_SYMBOL(drm_mode_config_init);
5681
5682/**
5683 * drm_mode_config_cleanup - free up DRM mode_config info
5684 * @dev: DRM device
5685 *
5686 * Free up all the connectors and CRTCs associated with this DRM device, then
5687 * free up the framebuffers and associated buffer objects.
5688 *
5689 * Note that since this /should/ happen single-threaded at driver/device
5690 * teardown time, no locking is required. It's the driver's job to ensure that
5691 * this guarantee actually holds true.
5692 *
5693 * FIXME: cleanup any dangling user buffer objects too
5694 */
5695void drm_mode_config_cleanup(struct drm_device *dev)
5696{
5697 struct drm_connector *connector, *ot;
5698 struct drm_crtc *crtc, *ct;
5699 struct drm_encoder *encoder, *enct;
5700 struct drm_framebuffer *fb, *fbt;
5701 struct drm_property *property, *pt;
5702 struct drm_property_blob *blob, *bt;
5703 struct drm_plane *plane, *plt;
5704
5705 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
5706 head) {
5707 encoder->funcs->destroy(encoder);
5708 }
5709
5710 list_for_each_entry_safe(connector, ot,
5711 &dev->mode_config.connector_list, head) {
5712 connector->funcs->destroy(connector);
5713 }
5714
5715 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
5716 head) {
5717 drm_property_destroy(dev, property);
5718 }
5719
5720 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
e2f5d2ea 5721 head_global) {
6bcacf51 5722 drm_property_unreference_blob(blob);
87d24fc3
LP		 5723 }
5724
5725 /*
5726 * Single-threaded teardown context, so it's not required to grab the
5727 * fb_lock to protect against concurrent fb_list access. Contrary, it
5728 * would actually deadlock with the drm_framebuffer_cleanup function.
5729 *
5730 * Also, if there are any framebuffers left, that's a driver leak now,
5731 * so politely WARN about this.
5732 */
5733 WARN_ON(!list_empty(&dev->mode_config.fb_list));
5734 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
c099b55a 5735 drm_framebuffer_free(&fb->refcount);
87d24fc3
LP		 5736 }
5737
5738 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
5739 head) {
5740 plane->funcs->destroy(plane);
5741 }
5742
5743 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
5744 crtc->funcs->destroy(crtc);
5745 }
5746
138f9ebb 5747 idr_destroy(&dev->mode_config.tile_idr);
87d24fc3 5748 idr_destroy(&dev->mode_config.crtc_idr);
51fd371b 5749 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
87d24fc3
LP		 5750}
5751EXPORT_SYMBOL(drm_mode_config_cleanup);
c1df5f3c
VS		 5752
5753struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
5754 unsigned int supported_rotations)
5755{
5756 static const struct drm_prop_enum_list props[] = {
5757 { DRM_ROTATE_0, "rotate-0" },
5758 { DRM_ROTATE_90, "rotate-90" },
5759 { DRM_ROTATE_180, "rotate-180" },
5760 { DRM_ROTATE_270, "rotate-270" },
5761 { DRM_REFLECT_X, "reflect-x" },
5762 { DRM_REFLECT_Y, "reflect-y" },
5763 };
5764
5765 return drm_property_create_bitmask(dev, 0, "rotation",
5766 props, ARRAY_SIZE(props),
5767 supported_rotations);
5768}
5769EXPORT_SYMBOL(drm_mode_create_rotation_property);
138f9ebb
DA		 5770
5771/**
5772 * DOC: Tile group
5773 *
5774 * Tile groups are used to represent tiled monitors with a unique
5775 * integer identifier. Tiled monitors using DisplayID v1.3 have
5776 * a unique 8-byte handle, we store this in a tile group, so we
5777 * have a common identifier for all tiles in a monitor group.
5778 */
5779static void drm_tile_group_free(struct kref *kref)
5780{
5781 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
5782 struct drm_device *dev = tg->dev;
5783 mutex_lock(&dev->mode_config.idr_mutex);
5784 idr_remove(&dev->mode_config.tile_idr, tg->id);
5785 mutex_unlock(&dev->mode_config.idr_mutex);
5786 kfree(tg);
5787}
5788
5789/**
5790 * drm_mode_put_tile_group - drop a reference to a tile group.
5791 * @dev: DRM device
5792 * @tg: tile group to drop reference to.
5793 *
5794 * drop reference to tile group and free if 0.
5795 */
5796void drm_mode_put_tile_group(struct drm_device *dev,
5797 struct drm_tile_group *tg)
5798{
5799 kref_put(&tg->refcount, drm_tile_group_free);
5800}
5801
5802/**
5803 * drm_mode_get_tile_group - get a reference to an existing tile group
5804 * @dev: DRM device
5805 * @topology: 8-bytes unique per monitor.
5806 *
5807 * Use the unique bytes to get a reference to an existing tile group.
5808 *
5809 * RETURNS:
5810 * tile group or NULL if not found.
5811 */
5812struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
5813 char topology[8])
5814{
5815 struct drm_tile_group *tg;
5816 int id;
5817 mutex_lock(&dev->mode_config.idr_mutex);
5818 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
5819 if (!memcmp(tg->group_data, topology, 8)) {
5820 if (!kref_get_unless_zero(&tg->refcount))
5821 tg = NULL;
5822 mutex_unlock(&dev->mode_config.idr_mutex);
5823 return tg;
5824 }
5825 }
5826 mutex_unlock(&dev->mode_config.idr_mutex);
5827 return NULL;
5828}
81ddd1bc 5829EXPORT_SYMBOL(drm_mode_get_tile_group);
138f9ebb
DA		 5830
5831/**
5832 * drm_mode_create_tile_group - create a tile group from a displayid description
5833 * @dev: DRM device
5834 * @topology: 8-bytes unique per monitor.
5835 *
5836 * Create a tile group for the unique monitor, and get a unique
5837 * identifier for the tile group.
5838 *
5839 * RETURNS:
5840 * new tile group or error.
5841 */
5842struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
5843 char topology[8])
5844{
5845 struct drm_tile_group *tg;
5846 int ret;
5847
5848 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
5849 if (!tg)
5850 return ERR_PTR(-ENOMEM);
5851
5852 kref_init(&tg->refcount);
5853 memcpy(tg->group_data, topology, 8);
5854 tg->dev = dev;
5855
5856 mutex_lock(&dev->mode_config.idr_mutex);
5857 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
5858 if (ret >= 0) {
5859 tg->id = ret;
5860 } else {
5861 kfree(tg);
5862 tg = ERR_PTR(ret);
5863 }
5864
5865 mutex_unlock(&dev->mode_config.idr_mutex);
5866 return tg;
5867}
81ddd1bc 5868EXPORT_SYMBOL(drm_mode_create_tile_group);
Linux kernel - Deliverables
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