Commit | Line | Data |
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785b93ef DA |
1 | /* |
2 | * Copyright (c) 2006-2009 Red Hat Inc. | |
3 | * Copyright (c) 2006-2008 Intel Corporation | |
4 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
5 | * | |
6 | * DRM framebuffer helper 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 | * Dave Airlie <airlied@linux.ie> | |
28 | * Jesse Barnes <jesse.barnes@intel.com> | |
29 | */ | |
d56b1b9d SK |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
3b40a443 | 32 | #include <linux/kernel.h> |
785b93ef | 33 | #include <linux/sysrq.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
785b93ef | 35 | #include <linux/fb.h> |
e0cd3608 | 36 | #include <linux/module.h> |
760285e7 DH |
37 | #include <drm/drmP.h> |
38 | #include <drm/drm_crtc.h> | |
39 | #include <drm/drm_fb_helper.h> | |
40 | #include <drm/drm_crtc_helper.h> | |
bbb1e524 RC |
41 | #include <drm/drm_atomic.h> |
42 | #include <drm/drm_atomic_helper.h> | |
785b93ef | 43 | |
f64c5573 DV |
44 | static bool drm_fbdev_emulation = true; |
45 | module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); | |
46 | MODULE_PARM_DESC(fbdev_emulation, | |
47 | "Enable legacy fbdev emulation [default=true]"); | |
48 | ||
785b93ef DA |
49 | static LIST_HEAD(kernel_fb_helper_list); |
50 | ||
d0ddc033 DV |
51 | /** |
52 | * DOC: fbdev helpers | |
53 | * | |
54 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 55 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
56 | * helper functions used by many drivers to implement the kernel mode setting |
57 | * interfaces. | |
207fd329 | 58 | * |
10a23102 TR |
59 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
60 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
61 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
62 | * default behaviour can override the third step with their own code. | |
63 | * Teardown is done with drm_fb_helper_fini(). | |
207fd329 DV |
64 | * |
65 | * At runtime drivers should restore the fbdev console by calling | |
3d9e35a9 GU |
66 | * drm_fb_helper_restore_fbdev_mode_unlocked() from their ->lastclose callback. |
67 | * They should also notify the fb helper code from updates to the output | |
207fd329 DV |
68 | * configuration by calling drm_fb_helper_hotplug_event(). For easier |
69 | * integration with the output polling code in drm_crtc_helper.c the modeset | |
83c617c5 | 70 | * code provides a ->output_poll_changed callback. |
207fd329 DV |
71 | * |
72 | * All other functions exported by the fb helper library can be used to | |
73 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
74 | * |
75 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
76 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
77 | * helper must be called first to initialize the minimum required to make | |
78 | * hotplug detection work. Drivers also need to make sure to properly set up | |
79 | * the dev->mode_config.funcs member. After calling drm_kms_helper_poll_init() | |
80 | * it is safe to enable interrupts and start processing hotplug events. At the | |
81 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
82 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
83 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
84 | * and set up an initial configuration using the detected hardware, drivers | |
85 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
86 | * drm_fb_helper_initial_config(). | |
d0ddc033 DV |
87 | */ |
88 | ||
207fd329 DV |
89 | /** |
90 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
91 | * emulation helper | |
92 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
93 | * | |
94 | * This functions adds all the available connectors for use with the given | |
95 | * fb_helper. This is a separate step to allow drivers to freely assign | |
96 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
97 | * not adequate to be used for the fbcon. | |
98 | * | |
169faeca DV |
99 | * This function is protected against concurrent connector hotadds/removals |
100 | * using drm_fb_helper_add_one_connector() and | |
101 | * drm_fb_helper_remove_one_connector(). | |
207fd329 | 102 | */ |
0b4c0f3f | 103 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 104 | { |
0b4c0f3f DA |
105 | struct drm_device *dev = fb_helper->dev; |
106 | struct drm_connector *connector; | |
15fce29d | 107 | int i, ret; |
d50ba256 | 108 | |
f64c5573 DV |
109 | if (!drm_fbdev_emulation) |
110 | return 0; | |
111 | ||
169faeca | 112 | mutex_lock(&dev->mode_config.mutex); |
6295d607 | 113 | drm_for_each_connector(connector, dev) { |
15fce29d | 114 | ret = drm_fb_helper_add_one_connector(fb_helper, connector); |
0b4c0f3f | 115 | |
15fce29d | 116 | if (ret) |
0b4c0f3f | 117 | goto fail; |
0b4c0f3f | 118 | } |
169faeca | 119 | mutex_unlock(&dev->mode_config.mutex); |
d50ba256 | 120 | return 0; |
0b4c0f3f DA |
121 | fail: |
122 | for (i = 0; i < fb_helper->connector_count; i++) { | |
123 | kfree(fb_helper->connector_info[i]); | |
124 | fb_helper->connector_info[i] = NULL; | |
125 | } | |
126 | fb_helper->connector_count = 0; | |
169faeca DV |
127 | mutex_unlock(&dev->mode_config.mutex); |
128 | ||
15fce29d | 129 | return ret; |
d50ba256 | 130 | } |
0b4c0f3f | 131 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 132 | |
65c2a89c DA |
133 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
134 | { | |
135 | struct drm_fb_helper_connector **temp; | |
136 | struct drm_fb_helper_connector *fb_helper_connector; | |
137 | ||
f64c5573 DV |
138 | if (!drm_fbdev_emulation) |
139 | return 0; | |
140 | ||
65c2a89c DA |
141 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
142 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { | |
14f476fa | 143 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
65c2a89c DA |
144 | if (!temp) |
145 | return -ENOMEM; | |
146 | ||
147 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; | |
148 | fb_helper->connector_info = temp; | |
149 | } | |
150 | ||
151 | ||
152 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
153 | if (!fb_helper_connector) | |
154 | return -ENOMEM; | |
155 | ||
156 | fb_helper_connector->connector = connector; | |
157 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
158 | return 0; | |
159 | } | |
160 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
161 | ||
2148f18f RC |
162 | static void remove_from_modeset(struct drm_mode_set *set, |
163 | struct drm_connector *connector) | |
164 | { | |
165 | int i, j; | |
166 | ||
167 | for (i = 0; i < set->num_connectors; i++) { | |
168 | if (set->connectors[i] == connector) | |
169 | break; | |
170 | } | |
171 | ||
172 | if (i == set->num_connectors) | |
173 | return; | |
174 | ||
175 | for (j = i + 1; j < set->num_connectors; j++) { | |
176 | set->connectors[j - 1] = set->connectors[j]; | |
177 | } | |
178 | set->num_connectors--; | |
179 | ||
cebbb739 | 180 | /* |
2148f18f RC |
181 | * TODO maybe need to makes sure we set it back to !=NULL somewhere? |
182 | */ | |
cebbb739 | 183 | if (set->num_connectors == 0) { |
2148f18f | 184 | set->fb = NULL; |
cebbb739 ML |
185 | drm_mode_destroy(connector->dev, set->mode); |
186 | set->mode = NULL; | |
187 | } | |
2148f18f RC |
188 | } |
189 | ||
65c2a89c DA |
190 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, |
191 | struct drm_connector *connector) | |
192 | { | |
193 | struct drm_fb_helper_connector *fb_helper_connector; | |
194 | int i, j; | |
195 | ||
f64c5573 DV |
196 | if (!drm_fbdev_emulation) |
197 | return 0; | |
198 | ||
65c2a89c DA |
199 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
200 | ||
201 | for (i = 0; i < fb_helper->connector_count; i++) { | |
202 | if (fb_helper->connector_info[i]->connector == connector) | |
203 | break; | |
204 | } | |
205 | ||
206 | if (i == fb_helper->connector_count) | |
207 | return -EINVAL; | |
208 | fb_helper_connector = fb_helper->connector_info[i]; | |
209 | ||
210 | for (j = i + 1; j < fb_helper->connector_count; j++) { | |
211 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; | |
212 | } | |
213 | fb_helper->connector_count--; | |
214 | kfree(fb_helper_connector); | |
2148f18f RC |
215 | |
216 | /* also cleanup dangling references to the connector: */ | |
217 | for (i = 0; i < fb_helper->crtc_count; i++) | |
218 | remove_from_modeset(&fb_helper->crtc_info[i].mode_set, connector); | |
219 | ||
65c2a89c DA |
220 | return 0; |
221 | } | |
222 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
223 | ||
99231028 JW |
224 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
225 | { | |
226 | uint16_t *r_base, *g_base, *b_base; | |
227 | int i; | |
228 | ||
04c0c569 VS |
229 | if (helper->funcs->gamma_get == NULL) |
230 | return; | |
231 | ||
99231028 JW |
232 | r_base = crtc->gamma_store; |
233 | g_base = r_base + crtc->gamma_size; | |
234 | b_base = g_base + crtc->gamma_size; | |
235 | ||
236 | for (i = 0; i < crtc->gamma_size; i++) | |
237 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
238 | } | |
239 | ||
240 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
241 | { | |
242 | uint16_t *r_base, *g_base, *b_base; | |
243 | ||
ebe0f244 LP |
244 | if (crtc->funcs->gamma_set == NULL) |
245 | return; | |
246 | ||
99231028 JW |
247 | r_base = crtc->gamma_store; |
248 | g_base = r_base + crtc->gamma_size; | |
249 | b_base = g_base + crtc->gamma_size; | |
250 | ||
251 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); | |
252 | } | |
253 | ||
207fd329 DV |
254 | /** |
255 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
256 | * @info: fbdev registered by the helper | |
257 | */ | |
1a7aba7f JB |
258 | int drm_fb_helper_debug_enter(struct fb_info *info) |
259 | { | |
260 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 261 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
262 | int i; |
263 | ||
1a7aba7f JB |
264 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
265 | for (i = 0; i < helper->crtc_count; i++) { | |
266 | struct drm_mode_set *mode_set = | |
267 | &helper->crtc_info[i].mode_set; | |
268 | ||
269 | if (!mode_set->crtc->enabled) | |
270 | continue; | |
271 | ||
272 | funcs = mode_set->crtc->helper_private; | |
99231028 | 273 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
274 | funcs->mode_set_base_atomic(mode_set->crtc, |
275 | mode_set->fb, | |
276 | mode_set->x, | |
413d45d3 | 277 | mode_set->y, |
21c74a8e | 278 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
279 | } |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
284 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
285 | ||
286 | /* Find the real fb for a given fb helper CRTC */ | |
287 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
288 | { | |
289 | struct drm_device *dev = crtc->dev; | |
290 | struct drm_crtc *c; | |
291 | ||
6295d607 | 292 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 293 | if (crtc->base.id == c->base.id) |
f4510a27 | 294 | return c->primary->fb; |
1a7aba7f JB |
295 | } |
296 | ||
297 | return NULL; | |
298 | } | |
299 | ||
207fd329 DV |
300 | /** |
301 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
302 | * @info: fbdev registered by the helper | |
303 | */ | |
1a7aba7f JB |
304 | int drm_fb_helper_debug_leave(struct fb_info *info) |
305 | { | |
306 | struct drm_fb_helper *helper = info->par; | |
307 | struct drm_crtc *crtc; | |
be26a66d | 308 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
309 | struct drm_framebuffer *fb; |
310 | int i; | |
311 | ||
312 | for (i = 0; i < helper->crtc_count; i++) { | |
313 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
314 | crtc = mode_set->crtc; | |
315 | funcs = crtc->helper_private; | |
316 | fb = drm_mode_config_fb(crtc); | |
317 | ||
318 | if (!crtc->enabled) | |
319 | continue; | |
320 | ||
321 | if (!fb) { | |
322 | DRM_ERROR("no fb to restore??\n"); | |
323 | continue; | |
324 | } | |
325 | ||
99231028 | 326 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 327 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 328 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
329 | } |
330 | ||
331 | return 0; | |
332 | } | |
333 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
334 | ||
bbb1e524 RC |
335 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
336 | { | |
337 | struct drm_device *dev = fb_helper->dev; | |
338 | struct drm_plane *plane; | |
339 | struct drm_atomic_state *state; | |
340 | int i, ret; | |
f72c6b33 | 341 | unsigned plane_mask; |
bbb1e524 RC |
342 | |
343 | state = drm_atomic_state_alloc(dev); | |
344 | if (!state) | |
345 | return -ENOMEM; | |
346 | ||
347 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
348 | retry: | |
f72c6b33 | 349 | plane_mask = 0; |
bbb1e524 RC |
350 | drm_for_each_plane(plane, dev) { |
351 | struct drm_plane_state *plane_state; | |
352 | ||
353 | plane_state = drm_atomic_get_plane_state(state, plane); | |
354 | if (IS_ERR(plane_state)) { | |
355 | ret = PTR_ERR(plane_state); | |
356 | goto fail; | |
357 | } | |
358 | ||
16e910df | 359 | plane_state->rotation = BIT(DRM_ROTATE_0); |
bbb1e524 | 360 | |
f72c6b33 ML |
361 | plane->old_fb = plane->fb; |
362 | plane_mask |= 1 << drm_plane_index(plane); | |
363 | ||
bbb1e524 RC |
364 | /* disable non-primary: */ |
365 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
366 | continue; | |
367 | ||
368 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
369 | if (ret != 0) | |
370 | goto fail; | |
371 | } | |
372 | ||
373 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
374 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
375 | ||
376 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
377 | if (ret != 0) | |
378 | goto fail; | |
379 | } | |
380 | ||
381 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
382 | |
383 | fail: | |
f72c6b33 | 384 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 385 | |
bbb1e524 RC |
386 | if (ret == -EDEADLK) |
387 | goto backoff; | |
388 | ||
94284037 MR |
389 | if (ret != 0) |
390 | drm_atomic_state_free(state); | |
bbb1e524 RC |
391 | |
392 | return ret; | |
393 | ||
394 | backoff: | |
395 | drm_atomic_state_clear(state); | |
396 | drm_atomic_legacy_backoff(state); | |
397 | ||
398 | goto retry; | |
399 | } | |
400 | ||
b7bdf0a8 | 401 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 402 | { |
3858bc5d VS |
403 | struct drm_device *dev = fb_helper->dev; |
404 | struct drm_plane *plane; | |
3858bc5d VS |
405 | int i; |
406 | ||
407 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 408 | |
bbb1e524 RC |
409 | if (fb_helper->atomic) |
410 | return restore_fbdev_mode_atomic(fb_helper); | |
411 | ||
6295d607 | 412 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
413 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
414 | drm_plane_force_disable(plane); | |
6aed8ec3 | 415 | |
9783de20 | 416 | if (dev->mode_config.rotation_property) { |
3a5f87c2 TW |
417 | drm_mode_plane_set_obj_prop(plane, |
418 | dev->mode_config.rotation_property, | |
419 | BIT(DRM_ROTATE_0)); | |
9783de20 SJ |
420 | } |
421 | } | |
422 | ||
e8e7a2b8 DA |
423 | for (i = 0; i < fb_helper->crtc_count; i++) { |
424 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
425 | struct drm_crtc *crtc = mode_set->crtc; |
426 | int ret; | |
427 | ||
03f9abb2 AD |
428 | if (crtc->funcs->cursor_set2) { |
429 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
430 | if (ret) | |
48f87dd1 | 431 | return ret; |
03f9abb2 | 432 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
433 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
434 | if (ret) | |
b7bdf0a8 | 435 | return ret; |
3858bc5d VS |
436 | } |
437 | ||
2d13b679 | 438 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 439 | if (ret) |
b7bdf0a8 | 440 | return ret; |
e8e7a2b8 | 441 | } |
b7bdf0a8 DV |
442 | |
443 | return 0; | |
e8e7a2b8 | 444 | } |
5ea1f752 RC |
445 | |
446 | /** | |
447 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
448 | * @fb_helper: fbcon to restore | |
449 | * | |
450 | * This should be called from driver's drm ->lastclose callback | |
451 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
452 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
453 | * |
454 | * RETURNS: | |
455 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 456 | */ |
b7bdf0a8 | 457 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
458 | { |
459 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
460 | bool do_delayed; |
461 | int ret; | |
e2809c7d | 462 | |
f64c5573 DV |
463 | if (!drm_fbdev_emulation) |
464 | return -ENODEV; | |
465 | ||
5ea1f752 RC |
466 | drm_modeset_lock_all(dev); |
467 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
468 | |
469 | do_delayed = fb_helper->delayed_hotplug; | |
470 | if (do_delayed) | |
471 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 472 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
473 | |
474 | if (do_delayed) | |
475 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
476 | return ret; |
477 | } | |
478 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 479 | |
2c4124fd GU |
480 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
481 | { | |
482 | struct drm_device *dev = fb_helper->dev; | |
483 | struct drm_crtc *crtc; | |
484 | int bound = 0, crtcs_bound = 0; | |
485 | ||
486 | /* Sometimes user space wants everything disabled, so don't steal the | |
487 | * display if there's a master. */ | |
488 | if (dev->primary->master) | |
489 | return false; | |
490 | ||
491 | drm_for_each_crtc(crtc, dev) { | |
492 | if (crtc->primary->fb) | |
493 | crtcs_bound++; | |
494 | if (crtc->primary->fb == fb_helper->fb) | |
495 | bound++; | |
496 | } | |
497 | ||
498 | if (bound < crtcs_bound) | |
499 | return false; | |
500 | ||
501 | return true; | |
502 | } | |
503 | ||
504 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
505 | /* |
506 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
507 | * and panic handling. | |
508 | */ | |
78b9c353 | 509 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 510 | { |
785b93ef DA |
511 | bool ret, error = false; |
512 | struct drm_fb_helper *helper; | |
513 | ||
514 | if (list_empty(&kernel_fb_helper_list)) | |
515 | return false; | |
516 | ||
517 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
518 | struct drm_device *dev = helper->dev; |
519 | ||
520 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
521 | continue; | |
522 | ||
dd908c86 | 523 | drm_modeset_lock_all(dev); |
3d9e35a9 | 524 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
525 | if (ret) |
526 | error = true; | |
cb597bb3 | 527 | drm_modeset_unlock_all(dev); |
785b93ef DA |
528 | } |
529 | return error; | |
530 | } | |
531 | ||
785b93ef DA |
532 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
533 | { | |
d21bf469 DV |
534 | bool ret; |
535 | ret = drm_fb_helper_force_kernel_mode(); | |
536 | if (ret == true) | |
537 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
538 | } |
539 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
540 | ||
1495cc9d | 541 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
542 | { |
543 | schedule_work(&drm_fb_helper_restore_work); | |
544 | } | |
545 | ||
546 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
547 | .handler = drm_fb_helper_sysrq, | |
548 | .help_msg = "force-fb(V)", | |
549 | .action_msg = "Restore framebuffer console", | |
550 | }; | |
b8c40d62 RD |
551 | #else |
552 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 553 | #endif |
785b93ef | 554 | |
3a8148c5 | 555 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
556 | { |
557 | struct drm_fb_helper *fb_helper = info->par; | |
558 | struct drm_device *dev = fb_helper->dev; | |
559 | struct drm_crtc *crtc; | |
023eb571 | 560 | struct drm_connector *connector; |
023eb571 | 561 | int i, j; |
785b93ef DA |
562 | |
563 | /* | |
3a8148c5 | 564 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 565 | */ |
84849903 | 566 | drm_modeset_lock_all(dev); |
20c60c35 DV |
567 | if (!drm_fb_helper_is_bound(fb_helper)) { |
568 | drm_modeset_unlock_all(dev); | |
569 | return; | |
570 | } | |
571 | ||
e87b2c42 | 572 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 573 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 574 | |
8be48d92 DA |
575 | if (!crtc->enabled) |
576 | continue; | |
577 | ||
3a8148c5 | 578 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
579 | for (j = 0; j < fb_helper->connector_count; j++) { |
580 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 581 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 582 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 583 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 584 | } |
785b93ef | 585 | } |
84849903 | 586 | drm_modeset_unlock_all(dev); |
785b93ef DA |
587 | } |
588 | ||
207fd329 DV |
589 | /** |
590 | * drm_fb_helper_blank - implementation for ->fb_blank | |
591 | * @blank: desired blanking state | |
592 | * @info: fbdev registered by the helper | |
593 | */ | |
785b93ef DA |
594 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
595 | { | |
c50bfd08 DV |
596 | if (oops_in_progress) |
597 | return -EBUSY; | |
598 | ||
785b93ef | 599 | switch (blank) { |
731b5a15 | 600 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 601 | case FB_BLANK_UNBLANK: |
3a8148c5 | 602 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 603 | break; |
731b5a15 | 604 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 605 | case FB_BLANK_NORMAL: |
3a8148c5 | 606 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 607 | break; |
731b5a15 | 608 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 609 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 610 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 611 | break; |
731b5a15 | 612 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 613 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 614 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 615 | break; |
731b5a15 | 616 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 617 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 618 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
619 | break; |
620 | } | |
621 | return 0; | |
622 | } | |
623 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
624 | ||
625 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
626 | { | |
627 | int i; | |
628 | ||
0b4c0f3f DA |
629 | for (i = 0; i < helper->connector_count; i++) |
630 | kfree(helper->connector_info[i]); | |
631 | kfree(helper->connector_info); | |
a1b7736d | 632 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 633 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
634 | if (helper->crtc_info[i].mode_set.mode) |
635 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
636 | } | |
785b93ef DA |
637 | kfree(helper->crtc_info); |
638 | } | |
639 | ||
10a23102 TR |
640 | /** |
641 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
642 | * @dev: DRM device | |
643 | * @helper: driver-allocated fbdev helper structure to set up | |
644 | * @funcs: pointer to structure of functions associate with this helper | |
645 | * | |
646 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
647 | * useful to implement race-free initialization of the polling helpers. | |
648 | */ | |
649 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
650 | const struct drm_fb_helper_funcs *funcs) | |
651 | { | |
652 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
653 | helper->funcs = funcs; | |
654 | helper->dev = dev; | |
655 | } | |
656 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
657 | ||
207fd329 DV |
658 | /** |
659 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
660 | * @dev: drm device | |
661 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
662 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
663 | * @max_conn_count: max connector count | |
664 | * | |
665 | * This allocates the structures for the fbdev helper with the given limits. | |
666 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
667 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
668 | * to allow driver writes more control over the exact init sequence. | |
669 | * | |
10a23102 | 670 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
671 | * |
672 | * RETURNS: | |
673 | * Zero if everything went ok, nonzero otherwise. | |
674 | */ | |
4abe3520 DA |
675 | int drm_fb_helper_init(struct drm_device *dev, |
676 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 677 | int crtc_count, int max_conn_count) |
785b93ef | 678 | { |
785b93ef | 679 | struct drm_crtc *crtc; |
785b93ef DA |
680 | int i; |
681 | ||
f64c5573 DV |
682 | if (!drm_fbdev_emulation) |
683 | return 0; | |
684 | ||
04cfe97e XL |
685 | if (!max_conn_count) |
686 | return -EINVAL; | |
687 | ||
4abe3520 DA |
688 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
689 | if (!fb_helper->crtc_info) | |
785b93ef DA |
690 | return -ENOMEM; |
691 | ||
4abe3520 DA |
692 | fb_helper->crtc_count = crtc_count; |
693 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
694 | if (!fb_helper->connector_info) { | |
695 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
696 | return -ENOMEM; |
697 | } | |
65c2a89c | 698 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 699 | fb_helper->connector_count = 0; |
785b93ef DA |
700 | |
701 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 702 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
703 | kcalloc(max_conn_count, |
704 | sizeof(struct drm_connector *), | |
705 | GFP_KERNEL); | |
706 | ||
4a1b0714 | 707 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 708 | goto out_free; |
4abe3520 | 709 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
710 | } |
711 | ||
712 | i = 0; | |
6295d607 | 713 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 714 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
715 | i++; |
716 | } | |
e9ad3181 | 717 | |
bbb1e524 RC |
718 | fb_helper->atomic = !!drm_core_check_feature(dev, DRIVER_ATOMIC); |
719 | ||
785b93ef DA |
720 | return 0; |
721 | out_free: | |
4abe3520 | 722 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
723 | return -ENOMEM; |
724 | } | |
4abe3520 DA |
725 | EXPORT_SYMBOL(drm_fb_helper_init); |
726 | ||
b8017d6c AT |
727 | /** |
728 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
729 | * @fb_helper: driver-allocated fbdev helper | |
730 | * | |
731 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
732 | * by the driver within the fb_probe fb_helper callback function. | |
733 | * | |
734 | * RETURNS: | |
735 | * fb_info pointer if things went okay, pointer containing error code | |
736 | * otherwise | |
737 | */ | |
738 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
739 | { | |
740 | struct device *dev = fb_helper->dev->dev; | |
741 | struct fb_info *info; | |
742 | int ret; | |
743 | ||
744 | info = framebuffer_alloc(0, dev); | |
745 | if (!info) | |
746 | return ERR_PTR(-ENOMEM); | |
747 | ||
748 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
749 | if (ret) | |
750 | goto err_release; | |
751 | ||
752 | info->apertures = alloc_apertures(1); | |
753 | if (!info->apertures) { | |
754 | ret = -ENOMEM; | |
755 | goto err_free_cmap; | |
756 | } | |
757 | ||
758 | fb_helper->fbdev = info; | |
759 | ||
760 | return info; | |
761 | ||
762 | err_free_cmap: | |
763 | fb_dealloc_cmap(&info->cmap); | |
764 | err_release: | |
765 | framebuffer_release(info); | |
766 | return ERR_PTR(ret); | |
767 | } | |
768 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
769 | ||
770 | /** | |
771 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
772 | * @fb_helper: driver-allocated fbdev helper | |
773 | * | |
774 | * A wrapper around unregister_framebuffer, to release the fb_info | |
775 | * framebuffer device | |
776 | */ | |
777 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
778 | { | |
779 | if (fb_helper && fb_helper->fbdev) | |
780 | unregister_framebuffer(fb_helper->fbdev); | |
781 | } | |
782 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
783 | ||
784 | /** | |
785 | * drm_fb_helper_release_fbi - dealloc fb_info and its members | |
786 | * @fb_helper: driver-allocated fbdev helper | |
787 | * | |
788 | * A helper to free memory taken by fb_info and the members cmap and | |
789 | * apertures | |
790 | */ | |
791 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
792 | { | |
793 | if (fb_helper) { | |
794 | struct fb_info *info = fb_helper->fbdev; | |
795 | ||
796 | if (info) { | |
797 | if (info->cmap.len) | |
798 | fb_dealloc_cmap(&info->cmap); | |
799 | framebuffer_release(info); | |
800 | } | |
801 | ||
802 | fb_helper->fbdev = NULL; | |
803 | } | |
804 | } | |
805 | EXPORT_SYMBOL(drm_fb_helper_release_fbi); | |
806 | ||
4abe3520 DA |
807 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
808 | { | |
f64c5573 DV |
809 | if (!drm_fbdev_emulation) |
810 | return; | |
811 | ||
4abe3520 DA |
812 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
813 | list_del(&fb_helper->kernel_fb_list); | |
814 | if (list_empty(&kernel_fb_helper_list)) { | |
4abe3520 DA |
815 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
816 | } | |
817 | } | |
818 | ||
819 | drm_fb_helper_crtc_free(fb_helper); | |
820 | ||
4abe3520 DA |
821 | } |
822 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 823 | |
47074ab7 AT |
824 | /** |
825 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
826 | * @fb_helper: driver-allocated fbdev helper | |
827 | * | |
828 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
829 | */ | |
830 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
831 | { | |
832 | if (fb_helper && fb_helper->fbdev) | |
833 | unlink_framebuffer(fb_helper->fbdev); | |
834 | } | |
835 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
836 | ||
cbb1a82e AT |
837 | /** |
838 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
839 | * @info: fb_info struct pointer | |
840 | * @buf: userspace buffer to read from framebuffer memory | |
841 | * @count: number of bytes to read from framebuffer memory | |
842 | * @ppos: read offset within framebuffer memory | |
843 | * | |
844 | * A wrapper around fb_sys_read implemented by fbdev core | |
845 | */ | |
846 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
847 | size_t count, loff_t *ppos) | |
848 | { | |
849 | return fb_sys_read(info, buf, count, ppos); | |
850 | } | |
851 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
852 | ||
853 | /** | |
854 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
855 | * @info: fb_info struct pointer | |
856 | * @buf: userspace buffer to write to framebuffer memory | |
857 | * @count: number of bytes to write to framebuffer memory | |
858 | * @ppos: write offset within framebuffer memory | |
859 | * | |
860 | * A wrapper around fb_sys_write implemented by fbdev core | |
861 | */ | |
862 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
863 | size_t count, loff_t *ppos) | |
864 | { | |
865 | return fb_sys_write(info, buf, count, ppos); | |
866 | } | |
867 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
868 | ||
742547b7 AT |
869 | /** |
870 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
871 | * @info: fbdev registered by the helper | |
872 | * @rect: info about rectangle to fill | |
873 | * | |
874 | * A wrapper around sys_fillrect implemented by fbdev core | |
875 | */ | |
876 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
877 | const struct fb_fillrect *rect) | |
878 | { | |
879 | sys_fillrect(info, rect); | |
880 | } | |
881 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
882 | ||
883 | /** | |
884 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
885 | * @info: fbdev registered by the helper | |
886 | * @area: info about area to copy | |
887 | * | |
888 | * A wrapper around sys_copyarea implemented by fbdev core | |
889 | */ | |
890 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
891 | const struct fb_copyarea *area) | |
892 | { | |
893 | sys_copyarea(info, area); | |
894 | } | |
895 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
896 | ||
897 | /** | |
898 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
899 | * @info: fbdev registered by the helper | |
900 | * @image: info about image to blit | |
901 | * | |
902 | * A wrapper around sys_imageblit implemented by fbdev core | |
903 | */ | |
904 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
905 | const struct fb_image *image) | |
906 | { | |
907 | sys_imageblit(info, image); | |
908 | } | |
909 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
910 | ||
911 | /** | |
912 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
913 | * @info: fbdev registered by the helper | |
914 | * @rect: info about rectangle to fill | |
915 | * | |
916 | * A wrapper around cfb_imageblit implemented by fbdev core | |
917 | */ | |
918 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
919 | const struct fb_fillrect *rect) | |
920 | { | |
921 | cfb_fillrect(info, rect); | |
922 | } | |
923 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
924 | ||
925 | /** | |
926 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
927 | * @info: fbdev registered by the helper | |
928 | * @area: info about area to copy | |
929 | * | |
930 | * A wrapper around cfb_copyarea implemented by fbdev core | |
931 | */ | |
932 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
933 | const struct fb_copyarea *area) | |
934 | { | |
935 | cfb_copyarea(info, area); | |
936 | } | |
937 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
938 | ||
939 | /** | |
940 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
941 | * @info: fbdev registered by the helper | |
942 | * @image: info about image to blit | |
943 | * | |
944 | * A wrapper around cfb_imageblit implemented by fbdev core | |
945 | */ | |
946 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
947 | const struct fb_image *image) | |
948 | { | |
949 | cfb_imageblit(info, image); | |
950 | } | |
951 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
952 | ||
fdefa58a AT |
953 | /** |
954 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
955 | * @fb_helper: driver-allocated fbdev helper | |
956 | * @state: desired state, zero to resume, non-zero to suspend | |
957 | * | |
958 | * A wrapper around fb_set_suspend implemented by fbdev core | |
959 | */ | |
960 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state) | |
961 | { | |
962 | if (fb_helper && fb_helper->fbdev) | |
963 | fb_set_suspend(fb_helper->fbdev, state); | |
964 | } | |
965 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
966 | ||
c850cb78 | 967 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
968 | u16 blue, u16 regno, struct fb_info *info) |
969 | { | |
970 | struct drm_fb_helper *fb_helper = info->par; | |
971 | struct drm_framebuffer *fb = fb_helper->fb; | |
972 | int pindex; | |
973 | ||
c850cb78 DA |
974 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
975 | u32 *palette; | |
976 | u32 value; | |
977 | /* place color in psuedopalette */ | |
978 | if (regno > 16) | |
979 | return -EINVAL; | |
980 | palette = (u32 *)info->pseudo_palette; | |
981 | red >>= (16 - info->var.red.length); | |
982 | green >>= (16 - info->var.green.length); | |
983 | blue >>= (16 - info->var.blue.length); | |
984 | value = (red << info->var.red.offset) | | |
985 | (green << info->var.green.offset) | | |
986 | (blue << info->var.blue.offset); | |
9da12b6a RC |
987 | if (info->var.transp.length > 0) { |
988 | u32 mask = (1 << info->var.transp.length) - 1; | |
989 | mask <<= info->var.transp.offset; | |
990 | value |= mask; | |
991 | } | |
c850cb78 DA |
992 | palette[regno] = value; |
993 | return 0; | |
994 | } | |
995 | ||
04c0c569 VS |
996 | /* |
997 | * The driver really shouldn't advertise pseudo/directcolor | |
998 | * visuals if it can't deal with the palette. | |
999 | */ | |
1000 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1001 | !fb_helper->funcs->gamma_get)) | |
1002 | return -EINVAL; | |
1003 | ||
b8c00ac5 DA |
1004 | pindex = regno; |
1005 | ||
1006 | if (fb->bits_per_pixel == 16) { | |
1007 | pindex = regno << 3; | |
1008 | ||
1009 | if (fb->depth == 16 && regno > 63) | |
c850cb78 | 1010 | return -EINVAL; |
b8c00ac5 | 1011 | if (fb->depth == 15 && regno > 31) |
c850cb78 | 1012 | return -EINVAL; |
b8c00ac5 DA |
1013 | |
1014 | if (fb->depth == 16) { | |
1015 | u16 r, g, b; | |
1016 | int i; | |
1017 | if (regno < 32) { | |
1018 | for (i = 0; i < 8; i++) | |
1019 | fb_helper->funcs->gamma_set(crtc, red, | |
1020 | green, blue, pindex + i); | |
1021 | } | |
1022 | ||
1023 | fb_helper->funcs->gamma_get(crtc, &r, | |
1024 | &g, &b, | |
1025 | pindex >> 1); | |
1026 | ||
1027 | for (i = 0; i < 4; i++) | |
1028 | fb_helper->funcs->gamma_set(crtc, r, | |
1029 | green, b, | |
1030 | (pindex >> 1) + i); | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | if (fb->depth != 16) | |
1035 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); | |
c850cb78 | 1036 | return 0; |
b8c00ac5 DA |
1037 | } |
1038 | ||
207fd329 DV |
1039 | /** |
1040 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
1041 | * @cmap: cmap to set | |
1042 | * @info: fbdev registered by the helper | |
1043 | */ | |
068143d3 DA |
1044 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1045 | { | |
1046 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1047 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1048 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1049 | u16 *red, *green, *blue, *transp; |
1050 | struct drm_crtc *crtc; | |
062ac622 | 1051 | int i, j, rc = 0; |
068143d3 DA |
1052 | int start; |
1053 | ||
c50bfd08 | 1054 | if (oops_in_progress) |
9aa609e1 | 1055 | return -EBUSY; |
c50bfd08 DV |
1056 | |
1057 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1058 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1059 | drm_modeset_unlock_all(dev); | |
1060 | return -EBUSY; | |
1061 | } | |
1062 | ||
8be48d92 DA |
1063 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1064 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1065 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1066 | |
1067 | red = cmap->red; | |
1068 | green = cmap->green; | |
1069 | blue = cmap->blue; | |
1070 | transp = cmap->transp; | |
1071 | start = cmap->start; | |
1072 | ||
062ac622 | 1073 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1074 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1075 | ||
1076 | hred = *red++; | |
1077 | hgreen = *green++; | |
1078 | hblue = *blue++; | |
1079 | ||
1080 | if (transp) | |
1081 | htransp = *transp++; | |
1082 | ||
c850cb78 DA |
1083 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1084 | if (rc) | |
8391a3d5 | 1085 | goto out; |
068143d3 | 1086 | } |
04c0c569 VS |
1087 | if (crtc_funcs->load_lut) |
1088 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1089 | } |
8391a3d5 VS |
1090 | out: |
1091 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1092 | return rc; |
1093 | } | |
1094 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1095 | ||
207fd329 DV |
1096 | /** |
1097 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
1098 | * @var: screeninfo to check | |
1099 | * @info: fbdev registered by the helper | |
1100 | */ | |
785b93ef DA |
1101 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1102 | struct fb_info *info) | |
1103 | { | |
1104 | struct drm_fb_helper *fb_helper = info->par; | |
1105 | struct drm_framebuffer *fb = fb_helper->fb; | |
1106 | int depth; | |
1107 | ||
f90ebd9e | 1108 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1109 | return -EINVAL; |
1110 | ||
1111 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
1112 | if (var->bits_per_pixel > fb->bits_per_pixel || |
1113 | var->xres > fb->width || var->yres > fb->height || | |
1114 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 1115 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
1116 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1117 | var->xres, var->yres, var->bits_per_pixel, | |
1118 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 1119 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
1120 | return -EINVAL; |
1121 | } | |
1122 | ||
1123 | switch (var->bits_per_pixel) { | |
1124 | case 16: | |
1125 | depth = (var->green.length == 6) ? 16 : 15; | |
1126 | break; | |
1127 | case 32: | |
1128 | depth = (var->transp.length > 0) ? 32 : 24; | |
1129 | break; | |
1130 | default: | |
1131 | depth = var->bits_per_pixel; | |
1132 | break; | |
1133 | } | |
1134 | ||
1135 | switch (depth) { | |
1136 | case 8: | |
1137 | var->red.offset = 0; | |
1138 | var->green.offset = 0; | |
1139 | var->blue.offset = 0; | |
1140 | var->red.length = 8; | |
1141 | var->green.length = 8; | |
1142 | var->blue.length = 8; | |
1143 | var->transp.length = 0; | |
1144 | var->transp.offset = 0; | |
1145 | break; | |
1146 | case 15: | |
1147 | var->red.offset = 10; | |
1148 | var->green.offset = 5; | |
1149 | var->blue.offset = 0; | |
1150 | var->red.length = 5; | |
1151 | var->green.length = 5; | |
1152 | var->blue.length = 5; | |
1153 | var->transp.length = 1; | |
1154 | var->transp.offset = 15; | |
1155 | break; | |
1156 | case 16: | |
1157 | var->red.offset = 11; | |
1158 | var->green.offset = 5; | |
1159 | var->blue.offset = 0; | |
1160 | var->red.length = 5; | |
1161 | var->green.length = 6; | |
1162 | var->blue.length = 5; | |
1163 | var->transp.length = 0; | |
1164 | var->transp.offset = 0; | |
1165 | break; | |
1166 | case 24: | |
1167 | var->red.offset = 16; | |
1168 | var->green.offset = 8; | |
1169 | var->blue.offset = 0; | |
1170 | var->red.length = 8; | |
1171 | var->green.length = 8; | |
1172 | var->blue.length = 8; | |
1173 | var->transp.length = 0; | |
1174 | var->transp.offset = 0; | |
1175 | break; | |
1176 | case 32: | |
1177 | var->red.offset = 16; | |
1178 | var->green.offset = 8; | |
1179 | var->blue.offset = 0; | |
1180 | var->red.length = 8; | |
1181 | var->green.length = 8; | |
1182 | var->blue.length = 8; | |
1183 | var->transp.length = 8; | |
1184 | var->transp.offset = 24; | |
1185 | break; | |
1186 | default: | |
1187 | return -EINVAL; | |
1188 | } | |
1189 | return 0; | |
1190 | } | |
1191 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1192 | ||
207fd329 DV |
1193 | /** |
1194 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
1195 | * @info: fbdev registered by the helper | |
1196 | * | |
1197 | * This will let fbcon do the mode init and is called at initialization time by | |
1198 | * the fbdev core when registering the driver, and later on through the hotplug | |
1199 | * callback. | |
1200 | */ | |
785b93ef DA |
1201 | int drm_fb_helper_set_par(struct fb_info *info) |
1202 | { | |
1203 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1204 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1205 | |
c50bfd08 DV |
1206 | if (oops_in_progress) |
1207 | return -EBUSY; | |
1208 | ||
5349ef31 | 1209 | if (var->pixclock != 0) { |
172e91f5 | 1210 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1211 | return -EINVAL; |
1212 | } | |
1213 | ||
5ea1f752 | 1214 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1215 | |
785b93ef DA |
1216 | return 0; |
1217 | } | |
1218 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1219 | ||
1edf0269 | 1220 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1221 | struct fb_info *info) |
1edf0269 RC |
1222 | { |
1223 | struct drm_fb_helper *fb_helper = info->par; | |
1224 | struct drm_device *dev = fb_helper->dev; | |
1225 | struct drm_atomic_state *state; | |
07d3bad6 | 1226 | struct drm_plane *plane; |
1edf0269 | 1227 | int i, ret; |
07d3bad6 | 1228 | unsigned plane_mask; |
1edf0269 RC |
1229 | |
1230 | state = drm_atomic_state_alloc(dev); | |
1231 | if (!state) | |
1232 | return -ENOMEM; | |
1233 | ||
1234 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1235 | retry: | |
07d3bad6 | 1236 | plane_mask = 0; |
1edf0269 RC |
1237 | for(i = 0; i < fb_helper->crtc_count; i++) { |
1238 | struct drm_mode_set *mode_set; | |
1239 | ||
1240 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1241 | ||
1242 | mode_set->x = var->xoffset; | |
1243 | mode_set->y = var->yoffset; | |
1244 | ||
1245 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1246 | if (ret != 0) | |
1247 | goto fail; | |
07d3bad6 ML |
1248 | |
1249 | plane = mode_set->crtc->primary; | |
7118fd9b | 1250 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1251 | plane->old_fb = plane->fb; |
1edf0269 RC |
1252 | } |
1253 | ||
1254 | ret = drm_atomic_commit(state); | |
1255 | if (ret != 0) | |
1256 | goto fail; | |
1257 | ||
1258 | info->var.xoffset = var->xoffset; | |
1259 | info->var.yoffset = var->yoffset; | |
1260 | ||
1edf0269 RC |
1261 | |
1262 | fail: | |
07d3bad6 | 1263 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1264 | |
1edf0269 RC |
1265 | if (ret == -EDEADLK) |
1266 | goto backoff; | |
1267 | ||
a0fb6ad7 DV |
1268 | if (ret != 0) |
1269 | drm_atomic_state_free(state); | |
1edf0269 RC |
1270 | |
1271 | return ret; | |
1272 | ||
1273 | backoff: | |
1274 | drm_atomic_state_clear(state); | |
1275 | drm_atomic_legacy_backoff(state); | |
1276 | ||
1277 | goto retry; | |
1278 | } | |
1279 | ||
207fd329 DV |
1280 | /** |
1281 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
1282 | * @var: updated screen information | |
1283 | * @info: fbdev registered by the helper | |
1284 | */ | |
785b93ef DA |
1285 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1286 | struct fb_info *info) | |
1287 | { | |
1288 | struct drm_fb_helper *fb_helper = info->par; | |
1289 | struct drm_device *dev = fb_helper->dev; | |
1290 | struct drm_mode_set *modeset; | |
785b93ef DA |
1291 | int ret = 0; |
1292 | int i; | |
1293 | ||
c50bfd08 | 1294 | if (oops_in_progress) |
9aa609e1 | 1295 | return -EBUSY; |
c50bfd08 DV |
1296 | |
1297 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1298 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1299 | drm_modeset_unlock_all(dev); | |
1300 | return -EBUSY; | |
1301 | } | |
1302 | ||
1edf0269 RC |
1303 | if (fb_helper->atomic) { |
1304 | ret = pan_display_atomic(var, info); | |
1305 | goto unlock; | |
1306 | } | |
1307 | ||
8be48d92 | 1308 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1309 | modeset = &fb_helper->crtc_info[i].mode_set; |
1310 | ||
1311 | modeset->x = var->xoffset; | |
1312 | modeset->y = var->yoffset; | |
1313 | ||
1314 | if (modeset->num_connectors) { | |
2d13b679 | 1315 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1316 | if (!ret) { |
1317 | info->var.xoffset = var->xoffset; | |
1318 | info->var.yoffset = var->yoffset; | |
1319 | } | |
1320 | } | |
1321 | } | |
1edf0269 | 1322 | unlock: |
84849903 | 1323 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1324 | return ret; |
1325 | } | |
1326 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1327 | ||
8acf658a | 1328 | /* |
207fd329 DV |
1329 | * Allocates the backing storage and sets up the fbdev info structure through |
1330 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1331 | * notifier. | |
8acf658a | 1332 | */ |
de1ace5b DV |
1333 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1334 | int preferred_bpp) | |
785b93ef | 1335 | { |
8acf658a | 1336 | int ret = 0; |
785b93ef | 1337 | int crtc_count = 0; |
4abe3520 | 1338 | int i; |
785b93ef | 1339 | struct fb_info *info; |
38651674 | 1340 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1341 | int gamma_size = 0; |
38651674 DA |
1342 | |
1343 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1344 | sizes.surface_depth = 24; | |
1345 | sizes.surface_bpp = 32; | |
1346 | sizes.fb_width = (unsigned)-1; | |
1347 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 1348 | |
b8c00ac5 DA |
1349 | /* if driver picks 8 or 16 by default use that |
1350 | for both depth/bpp */ | |
96081cdf | 1351 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1352 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1353 | |
785b93ef | 1354 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
1355 | for (i = 0; i < fb_helper->connector_count; i++) { |
1356 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 1357 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1358 | |
eaf99c74 | 1359 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1360 | |
1361 | if (cmdline_mode->bpp_specified) { | |
1362 | switch (cmdline_mode->bpp) { | |
1363 | case 8: | |
38651674 | 1364 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1365 | break; |
1366 | case 15: | |
38651674 DA |
1367 | sizes.surface_depth = 15; |
1368 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1369 | break; |
1370 | case 16: | |
38651674 | 1371 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1372 | break; |
1373 | case 24: | |
38651674 | 1374 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1375 | break; |
1376 | case 32: | |
38651674 DA |
1377 | sizes.surface_depth = 24; |
1378 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1379 | break; |
1380 | } | |
1381 | break; | |
1382 | } | |
1383 | } | |
1384 | ||
8be48d92 DA |
1385 | crtc_count = 0; |
1386 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1387 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1388 | struct drm_mode_set *mode_set; |
1389 | int x, y, j; | |
1390 | /* in case of tile group, are we the last tile vert or horiz? | |
1391 | * If no tile group you are always the last one both vertically | |
1392 | * and horizontally | |
1393 | */ | |
1394 | bool lastv = true, lasth = true; | |
675c8328 | 1395 | |
8be48d92 | 1396 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1397 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1398 | |
1399 | if (!desired_mode) | |
1400 | continue; | |
1401 | ||
1402 | crtc_count++; | |
1403 | ||
b0ee9e7f DA |
1404 | x = fb_helper->crtc_info[i].x; |
1405 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1406 | |
1407 | if (gamma_size == 0) | |
1408 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1409 | ||
1410 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1411 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1412 | |
1413 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1414 | struct drm_connector *connector = mode_set->connectors[j]; | |
1415 | if (connector->has_tile) { | |
1416 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1417 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1418 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1419 | break; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | if (lasth) | |
1424 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1425 | if (lastv) | |
1426 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1427 | } |
1428 | ||
38651674 | 1429 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1430 | /* hmm everyone went away - assume VGA cable just fell out |
1431 | and will come back later. */ | |
eb1f8e4f | 1432 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1433 | sizes.fb_width = sizes.surface_width = 1024; |
1434 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1435 | } |
1436 | ||
38651674 | 1437 | /* push down into drivers */ |
8acf658a DV |
1438 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1439 | if (ret < 0) | |
1440 | return ret; | |
785b93ef | 1441 | |
38651674 | 1442 | info = fb_helper->fbdev; |
785b93ef | 1443 | |
7e53f3a4 DV |
1444 | /* |
1445 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1446 | * events, but at init time drm_setup_crtcs needs to be called before | |
1447 | * the fb is allocated (since we need to figure out the desired size of | |
1448 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1449 | * here again. | |
1450 | */ | |
96081cdf | 1451 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1452 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1453 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1454 | ||
785b93ef | 1455 | |
8acf658a DV |
1456 | info->var.pixclock = 0; |
1457 | if (register_framebuffer(info) < 0) | |
1458 | return -EINVAL; | |
38651674 | 1459 | |
8acf658a DV |
1460 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1461 | info->node, info->fix.id); | |
785b93ef | 1462 | |
785b93ef | 1463 | if (list_empty(&kernel_fb_helper_list)) { |
785b93ef DA |
1464 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
1465 | } | |
8acf658a DV |
1466 | |
1467 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1468 | |
785b93ef DA |
1469 | return 0; |
1470 | } | |
785b93ef | 1471 | |
207fd329 DV |
1472 | /** |
1473 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1474 | * @info: fbdev registered by the helper | |
1475 | * @pitch: desired pitch | |
1476 | * @depth: desired depth | |
1477 | * | |
1478 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1479 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1480 | * additional constraints need to set up their own limits. | |
1481 | * | |
1482 | * Drivers should call this (or their equivalent setup code) from their | |
1483 | * ->fb_probe callback. | |
1484 | */ | |
3632ef89 DA |
1485 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1486 | uint32_t depth) | |
1487 | { | |
1488 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1489 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1490 | FB_VISUAL_TRUECOLOR; | |
1491 | info->fix.mmio_start = 0; | |
1492 | info->fix.mmio_len = 0; | |
1493 | info->fix.type_aux = 0; | |
1494 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1495 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1496 | info->fix.ywrapstep = 0; | |
1497 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1498 | |
1499 | info->fix.line_length = pitch; | |
1500 | return; | |
1501 | } | |
1502 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1503 | ||
207fd329 DV |
1504 | /** |
1505 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1506 | * @info: fbdev instance to set up | |
1507 | * @fb_helper: fb helper instance to use as template | |
1508 | * @fb_width: desired fb width | |
1509 | * @fb_height: desired fb height | |
1510 | * | |
1511 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1512 | * and the drm framebuffer allocated in fb_helper->fb. | |
1513 | * | |
1514 | * Drivers should call this (or their equivalent setup code) from their | |
1515 | * ->fb_probe callback after having allocated the fbdev backing | |
1516 | * storage framebuffer. | |
1517 | */ | |
38651674 | 1518 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1519 | uint32_t fb_width, uint32_t fb_height) |
1520 | { | |
38651674 DA |
1521 | struct drm_framebuffer *fb = fb_helper->fb; |
1522 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1523 | info->var.xres_virtual = fb->width; |
1524 | info->var.yres_virtual = fb->height; | |
1525 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1526 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1527 | info->var.xoffset = 0; |
1528 | info->var.yoffset = 0; | |
1529 | info->var.activate = FB_ACTIVATE_NOW; | |
1530 | info->var.height = -1; | |
1531 | info->var.width = -1; | |
1532 | ||
1533 | switch (fb->depth) { | |
1534 | case 8: | |
1535 | info->var.red.offset = 0; | |
1536 | info->var.green.offset = 0; | |
1537 | info->var.blue.offset = 0; | |
1538 | info->var.red.length = 8; /* 8bit DAC */ | |
1539 | info->var.green.length = 8; | |
1540 | info->var.blue.length = 8; | |
1541 | info->var.transp.offset = 0; | |
1542 | info->var.transp.length = 0; | |
1543 | break; | |
1544 | case 15: | |
1545 | info->var.red.offset = 10; | |
1546 | info->var.green.offset = 5; | |
1547 | info->var.blue.offset = 0; | |
1548 | info->var.red.length = 5; | |
1549 | info->var.green.length = 5; | |
1550 | info->var.blue.length = 5; | |
1551 | info->var.transp.offset = 15; | |
1552 | info->var.transp.length = 1; | |
1553 | break; | |
1554 | case 16: | |
1555 | info->var.red.offset = 11; | |
1556 | info->var.green.offset = 5; | |
1557 | info->var.blue.offset = 0; | |
1558 | info->var.red.length = 5; | |
1559 | info->var.green.length = 6; | |
1560 | info->var.blue.length = 5; | |
1561 | info->var.transp.offset = 0; | |
1562 | break; | |
1563 | case 24: | |
1564 | info->var.red.offset = 16; | |
1565 | info->var.green.offset = 8; | |
1566 | info->var.blue.offset = 0; | |
1567 | info->var.red.length = 8; | |
1568 | info->var.green.length = 8; | |
1569 | info->var.blue.length = 8; | |
1570 | info->var.transp.offset = 0; | |
1571 | info->var.transp.length = 0; | |
1572 | break; | |
1573 | case 32: | |
1574 | info->var.red.offset = 16; | |
1575 | info->var.green.offset = 8; | |
1576 | info->var.blue.offset = 0; | |
1577 | info->var.red.length = 8; | |
1578 | info->var.green.length = 8; | |
1579 | info->var.blue.length = 8; | |
1580 | info->var.transp.offset = 24; | |
1581 | info->var.transp.length = 8; | |
1582 | break; | |
1583 | default: | |
1584 | break; | |
1585 | } | |
1586 | ||
1587 | info->var.xres = fb_width; | |
1588 | info->var.yres = fb_height; | |
1589 | } | |
1590 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1591 | |
0b4c0f3f DA |
1592 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1593 | uint32_t maxX, | |
1594 | uint32_t maxY) | |
38651674 DA |
1595 | { |
1596 | struct drm_connector *connector; | |
1597 | int count = 0; | |
0b4c0f3f | 1598 | int i; |
38651674 | 1599 | |
0b4c0f3f DA |
1600 | for (i = 0; i < fb_helper->connector_count; i++) { |
1601 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1602 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1603 | } | |
1604 | ||
1605 | return count; | |
1606 | } | |
1607 | ||
2f1046f3 | 1608 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1609 | { |
1610 | struct drm_display_mode *mode; | |
1611 | ||
0b4c0f3f | 1612 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1613 | if (mode->hdisplay > width || |
1614 | mode->vdisplay > height) | |
38651674 DA |
1615 | continue; |
1616 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1617 | return mode; | |
1618 | } | |
1619 | return NULL; | |
1620 | } | |
2f1046f3 | 1621 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1622 | |
0b4c0f3f | 1623 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1624 | { |
eaf99c74 | 1625 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1626 | } |
1627 | ||
2f1046f3 | 1628 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1629 | int width, int height) |
38651674 | 1630 | { |
1794d257 | 1631 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1632 | struct drm_display_mode *mode; |
c683f427 | 1633 | bool prefer_non_interlace; |
38651674 | 1634 | |
eaf99c74 | 1635 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1636 | if (cmdline_mode->specified == false) |
f3af5c7d | 1637 | return NULL; |
38651674 DA |
1638 | |
1639 | /* attempt to find a matching mode in the list of modes | |
1640 | * we have gotten so far, if not add a CVT mode that conforms | |
1641 | */ | |
1642 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1643 | goto create_mode; | |
1644 | ||
c683f427 | 1645 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1646 | again: |
0b4c0f3f | 1647 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1648 | /* check width/height */ |
1649 | if (mode->hdisplay != cmdline_mode->xres || | |
1650 | mode->vdisplay != cmdline_mode->yres) | |
1651 | continue; | |
1652 | ||
1653 | if (cmdline_mode->refresh_specified) { | |
1654 | if (mode->vrefresh != cmdline_mode->refresh) | |
1655 | continue; | |
1656 | } | |
1657 | ||
1658 | if (cmdline_mode->interlace) { | |
1659 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1660 | continue; | |
c683f427 TI |
1661 | } else if (prefer_non_interlace) { |
1662 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1663 | continue; | |
38651674 DA |
1664 | } |
1665 | return mode; | |
1666 | } | |
1667 | ||
c683f427 TI |
1668 | if (prefer_non_interlace) { |
1669 | prefer_non_interlace = false; | |
1670 | goto again; | |
1671 | } | |
1672 | ||
38651674 | 1673 | create_mode: |
1794d257 CW |
1674 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1675 | cmdline_mode); | |
0b4c0f3f | 1676 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1677 | return mode; |
1678 | } | |
2f1046f3 | 1679 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1680 | |
1681 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1682 | { | |
1683 | bool enable; | |
1684 | ||
96081cdf | 1685 | if (strict) |
38651674 | 1686 | enable = connector->status == connector_status_connected; |
96081cdf | 1687 | else |
38651674 | 1688 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1689 | |
38651674 DA |
1690 | return enable; |
1691 | } | |
1692 | ||
0b4c0f3f DA |
1693 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1694 | bool *enabled) | |
38651674 DA |
1695 | { |
1696 | bool any_enabled = false; | |
1697 | struct drm_connector *connector; | |
1698 | int i = 0; | |
1699 | ||
0b4c0f3f DA |
1700 | for (i = 0; i < fb_helper->connector_count; i++) { |
1701 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1702 | enabled[i] = drm_connector_enabled(connector, true); |
1703 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1704 | enabled[i] ? "yes" : "no"); | |
1705 | any_enabled |= enabled[i]; | |
38651674 DA |
1706 | } |
1707 | ||
1708 | if (any_enabled) | |
1709 | return; | |
1710 | ||
0b4c0f3f DA |
1711 | for (i = 0; i < fb_helper->connector_count; i++) { |
1712 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1713 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1714 | } |
1715 | } | |
1716 | ||
1d42bbc8 DA |
1717 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1718 | struct drm_display_mode **modes, | |
b0ee9e7f | 1719 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1720 | bool *enabled, int width, int height) |
1721 | { | |
1722 | int count, i, j; | |
1723 | bool can_clone = false; | |
1724 | struct drm_fb_helper_connector *fb_helper_conn; | |
1725 | struct drm_display_mode *dmt_mode, *mode; | |
1726 | ||
1727 | /* only contemplate cloning in the single crtc case */ | |
1728 | if (fb_helper->crtc_count > 1) | |
1729 | return false; | |
1730 | ||
1731 | count = 0; | |
1732 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1733 | if (enabled[i]) | |
1734 | count++; | |
1735 | } | |
1736 | ||
1737 | /* only contemplate cloning if more than one connector is enabled */ | |
1738 | if (count <= 1) | |
1739 | return false; | |
1740 | ||
1741 | /* check the command line or if nothing common pick 1024x768 */ | |
1742 | can_clone = true; | |
1743 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1744 | if (!enabled[i]) | |
1745 | continue; | |
1746 | fb_helper_conn = fb_helper->connector_info[i]; | |
1747 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1748 | if (!modes[i]) { | |
1749 | can_clone = false; | |
1750 | break; | |
1751 | } | |
1752 | for (j = 0; j < i; j++) { | |
1753 | if (!enabled[j]) | |
1754 | continue; | |
1755 | if (!drm_mode_equal(modes[j], modes[i])) | |
1756 | can_clone = false; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | if (can_clone) { | |
1761 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1762 | return true; | |
1763 | } | |
1764 | ||
1765 | /* try and find a 1024x768 mode on each connector */ | |
1766 | can_clone = true; | |
f6e252ba | 1767 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1768 | |
1769 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1770 | ||
1771 | if (!enabled[i]) | |
1772 | continue; | |
1773 | ||
1774 | fb_helper_conn = fb_helper->connector_info[i]; | |
1775 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1776 | if (drm_mode_equal(mode, dmt_mode)) | |
1777 | modes[i] = mode; | |
1778 | } | |
1779 | if (!modes[i]) | |
1780 | can_clone = false; | |
1781 | } | |
1782 | ||
1783 | if (can_clone) { | |
1784 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1785 | return true; | |
1786 | } | |
1787 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1788 | return false; | |
1789 | } | |
1790 | ||
b0ee9e7f DA |
1791 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1792 | struct drm_display_mode **modes, | |
1793 | struct drm_fb_offset *offsets, | |
1794 | int idx, | |
1795 | int h_idx, int v_idx) | |
1796 | { | |
1797 | struct drm_fb_helper_connector *fb_helper_conn; | |
1798 | int i; | |
1799 | int hoffset = 0, voffset = 0; | |
1800 | ||
1801 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1802 | fb_helper_conn = fb_helper->connector_info[i]; | |
1803 | if (!fb_helper_conn->connector->has_tile) | |
1804 | continue; | |
1805 | ||
1806 | if (!modes[i] && (h_idx || v_idx)) { | |
1807 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1808 | fb_helper_conn->connector->base.id); | |
1809 | continue; | |
1810 | } | |
1811 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1812 | hoffset += modes[i]->hdisplay; | |
1813 | ||
1814 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1815 | voffset += modes[i]->vdisplay; | |
1816 | } | |
1817 | offsets[idx].x = hoffset; | |
1818 | offsets[idx].y = voffset; | |
1819 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1820 | return 0; | |
1821 | } | |
1822 | ||
0b4c0f3f | 1823 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1824 | struct drm_display_mode **modes, |
b0ee9e7f | 1825 | struct drm_fb_offset *offsets, |
38651674 DA |
1826 | bool *enabled, int width, int height) |
1827 | { | |
0b4c0f3f DA |
1828 | struct drm_fb_helper_connector *fb_helper_conn; |
1829 | int i; | |
b0ee9e7f DA |
1830 | uint64_t conn_configured = 0, mask; |
1831 | int tile_pass = 0; | |
1832 | mask = (1 << fb_helper->connector_count) - 1; | |
1833 | retry: | |
0b4c0f3f DA |
1834 | for (i = 0; i < fb_helper->connector_count; i++) { |
1835 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1836 | |
b0ee9e7f DA |
1837 | if (conn_configured & (1 << i)) |
1838 | continue; | |
1839 | ||
1840 | if (enabled[i] == false) { | |
1841 | conn_configured |= (1 << i); | |
1842 | continue; | |
1843 | } | |
1844 | ||
1845 | /* first pass over all the untiled connectors */ | |
1846 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1847 | continue; |
38651674 | 1848 | |
b0ee9e7f DA |
1849 | if (tile_pass == 1) { |
1850 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1851 | fb_helper_conn->connector->tile_v_loc != 0) | |
1852 | continue; | |
1853 | ||
1854 | } else { | |
1855 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1856 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1857 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1858 | continue; | |
1859 | ||
1860 | /* find the tile offsets for this pass - need | |
1861 | to find all tiles left and above */ | |
1862 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1863 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1864 | } | |
38651674 | 1865 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1866 | fb_helper_conn->connector->base.id); |
38651674 DA |
1867 | |
1868 | /* got for command line mode first */ | |
0b4c0f3f | 1869 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 | 1870 | if (!modes[i]) { |
b0ee9e7f DA |
1871 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
1872 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 1873 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
1874 | } |
1875 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1876 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1877 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1878 | break; |
1879 | } | |
1880 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1881 | "none"); | |
b0ee9e7f DA |
1882 | conn_configured |= (1 << i); |
1883 | } | |
1884 | ||
1885 | if ((conn_configured & mask) != mask) { | |
1886 | tile_pass++; | |
1887 | goto retry; | |
38651674 DA |
1888 | } |
1889 | return true; | |
1890 | } | |
1891 | ||
8be48d92 DA |
1892 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1893 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1894 | struct drm_display_mode **modes, |
1895 | int n, int width, int height) | |
1896 | { | |
1897 | int c, o; | |
8be48d92 | 1898 | struct drm_device *dev = fb_helper->dev; |
38651674 | 1899 | struct drm_connector *connector; |
be26a66d | 1900 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 1901 | struct drm_encoder *encoder; |
38651674 | 1902 | int my_score, best_score, score; |
8be48d92 | 1903 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1904 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1905 | |
0b4c0f3f | 1906 | if (n == fb_helper->connector_count) |
38651674 | 1907 | return 0; |
0b4c0f3f DA |
1908 | |
1909 | fb_helper_conn = fb_helper->connector_info[n]; | |
1910 | connector = fb_helper_conn->connector; | |
38651674 DA |
1911 | |
1912 | best_crtcs[n] = NULL; | |
8be48d92 | 1913 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1914 | if (modes[n] == NULL) |
1915 | return best_score; | |
1916 | ||
8be48d92 DA |
1917 | crtcs = kzalloc(dev->mode_config.num_connector * |
1918 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); | |
38651674 DA |
1919 | if (!crtcs) |
1920 | return best_score; | |
1921 | ||
1922 | my_score = 1; | |
1923 | if (connector->status == connector_status_connected) | |
1924 | my_score++; | |
0b4c0f3f | 1925 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1926 | my_score++; |
0b4c0f3f | 1927 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1928 | my_score++; |
1929 | ||
1930 | connector_funcs = connector->helper_private; | |
1931 | encoder = connector_funcs->best_encoder(connector); | |
1932 | if (!encoder) | |
1933 | goto out; | |
1934 | ||
38651674 DA |
1935 | /* select a crtc for this connector and then attempt to configure |
1936 | remaining connectors */ | |
8be48d92 DA |
1937 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1938 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1939 | |
96081cdf | 1940 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1941 | continue; |
38651674 DA |
1942 | |
1943 | for (o = 0; o < n; o++) | |
1944 | if (best_crtcs[o] == crtc) | |
1945 | break; | |
1946 | ||
1947 | if (o < n) { | |
1d42bbc8 DA |
1948 | /* ignore cloning unless only a single crtc */ |
1949 | if (fb_helper->crtc_count > 1) | |
1950 | continue; | |
1951 | ||
1952 | if (!drm_mode_equal(modes[o], modes[n])) | |
1953 | continue; | |
38651674 DA |
1954 | } |
1955 | ||
1956 | crtcs[n] = crtc; | |
8be48d92 DA |
1957 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
1958 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
1959 | width, height); |
1960 | if (score > best_score) { | |
38651674 DA |
1961 | best_score = score; |
1962 | memcpy(best_crtcs, crtcs, | |
1963 | dev->mode_config.num_connector * | |
8be48d92 | 1964 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 1965 | } |
38651674 DA |
1966 | } |
1967 | out: | |
1968 | kfree(crtcs); | |
1969 | return best_score; | |
1970 | } | |
1971 | ||
8be48d92 | 1972 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 1973 | { |
8be48d92 DA |
1974 | struct drm_device *dev = fb_helper->dev; |
1975 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 1976 | struct drm_display_mode **modes; |
b0ee9e7f | 1977 | struct drm_fb_offset *offsets; |
8be48d92 | 1978 | struct drm_mode_set *modeset; |
38651674 DA |
1979 | bool *enabled; |
1980 | int width, height; | |
11e17a08 | 1981 | int i; |
38651674 DA |
1982 | |
1983 | DRM_DEBUG_KMS("\n"); | |
1984 | ||
1985 | width = dev->mode_config.max_width; | |
1986 | height = dev->mode_config.max_height; | |
1987 | ||
383b2e57 | 1988 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 1989 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 1990 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 1991 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 1992 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 1993 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 1994 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 1995 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 1996 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
1997 | DRM_ERROR("Memory allocation failed\n"); |
1998 | goto out; | |
1999 | } | |
2000 | ||
38651674 | 2001 | |
0b4c0f3f | 2002 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2003 | |
11e17a08 JB |
2004 | if (!(fb_helper->funcs->initial_config && |
2005 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2006 | offsets, |
11e17a08 | 2007 | enabled, width, height))) { |
383b2e57 ML |
2008 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2009 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2010 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2011 | |
b0ee9e7f DA |
2012 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2013 | enabled, width, height) && | |
2014 | !drm_target_preferred(fb_helper, modes, offsets, | |
2015 | enabled, width, height)) | |
1d42bbc8 | 2016 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2017 | |
11e17a08 JB |
2018 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2019 | width, height); | |
38651674 | 2020 | |
11e17a08 JB |
2021 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2022 | } | |
8be48d92 DA |
2023 | |
2024 | /* need to set the modesets up here for use later */ | |
2025 | /* fill out the connector<->crtc mappings into the modesets */ | |
2026 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2027 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2028 | modeset->num_connectors = 0; | |
7e53f3a4 | 2029 | modeset->fb = NULL; |
8be48d92 | 2030 | } |
38651674 | 2031 | |
0b4c0f3f | 2032 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 2033 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2034 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2035 | struct drm_fb_offset *offset = &offsets[i]; |
8be48d92 | 2036 | modeset = &fb_crtc->mode_set; |
38651674 | 2037 | |
8be48d92 | 2038 | if (mode && fb_crtc) { |
b0ee9e7f DA |
2039 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2040 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
8be48d92 | 2041 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2042 | fb_crtc->x = offset->x; |
2043 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2044 | if (modeset->mode) |
2045 | drm_mode_destroy(dev, modeset->mode); | |
2046 | modeset->mode = drm_mode_duplicate(dev, | |
2047 | fb_crtc->desired_mode); | |
0b4c0f3f | 2048 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 2049 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2050 | modeset->x = offset->x; |
2051 | modeset->y = offset->y; | |
38651674 | 2052 | } |
38651674 DA |
2053 | } |
2054 | ||
7e53f3a4 DV |
2055 | /* Clear out any old modes if there are no more connected outputs. */ |
2056 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2057 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2058 | if (modeset->num_connectors == 0) { | |
2059 | BUG_ON(modeset->fb); | |
7e53f3a4 DV |
2060 | if (modeset->mode) |
2061 | drm_mode_destroy(dev, modeset->mode); | |
2062 | modeset->mode = NULL; | |
2063 | } | |
2064 | } | |
8c5eaca0 | 2065 | out: |
38651674 DA |
2066 | kfree(crtcs); |
2067 | kfree(modes); | |
b0ee9e7f | 2068 | kfree(offsets); |
38651674 DA |
2069 | kfree(enabled); |
2070 | } | |
2071 | ||
2072 | /** | |
207fd329 | 2073 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2074 | * @fb_helper: fb_helper device struct |
2075 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2076 | * |
d0ddc033 | 2077 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2078 | * At the moment, this is a cloned configuration across all heads with |
2079 | * a new framebuffer object as the backing store. | |
2080 | * | |
207fd329 DV |
2081 | * Note that this also registers the fbdev and so allows userspace to call into |
2082 | * the driver through the fbdev interfaces. | |
2083 | * | |
2084 | * This function will call down into the ->fb_probe callback to let | |
2085 | * the driver allocate and initialize the fbdev info structure and the drm | |
2086 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
2087 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
2088 | * values for the fbdev info structure. | |
2089 | * | |
40f8cf4b DV |
2090 | * HANG DEBUGGING: |
2091 | * | |
2092 | * When you have fbcon support built-in or already loaded, this function will do | |
2093 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2094 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2095 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2096 | * to consoles, not even serial console. This means when your driver crashes, | |
2097 | * you will see absolutely nothing else but a system stuck in this function, | |
2098 | * with no further output. Any kind of printk() you place within your own driver | |
2099 | * or in the drm core modeset code will also never show up. | |
2100 | * | |
2101 | * Standard debug practice is to run the fbcon setup without taking the | |
2102 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2103 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2104 | * cmdline option. | |
2105 | * | |
2106 | * The other option is to just disable fbdev emulation since very likely the | |
2107 | * first modest from userspace will crash in the same way, and is even easier to | |
2108 | * debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
2109 | * kernel cmdline option. | |
2110 | * | |
38651674 DA |
2111 | * RETURNS: |
2112 | * Zero if everything went ok, nonzero otherwise. | |
2113 | */ | |
01934c2a | 2114 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2115 | { |
8be48d92 | 2116 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
2117 | int count = 0; |
2118 | ||
f64c5573 DV |
2119 | if (!drm_fbdev_emulation) |
2120 | return 0; | |
2121 | ||
53f1904b | 2122 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
2123 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
2124 | dev->mode_config.max_width, | |
2125 | dev->mode_config.max_height); | |
53f1904b | 2126 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
2127 | /* |
2128 | * we shouldn't end up with no modes here. | |
2129 | */ | |
96081cdf | 2130 | if (count == 0) |
d56b1b9d | 2131 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 2132 | |
8be48d92 | 2133 | drm_setup_crtcs(fb_helper); |
38651674 | 2134 | |
4abe3520 | 2135 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 2136 | } |
8be48d92 | 2137 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2138 | |
7394371d CW |
2139 | /** |
2140 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2141 | * probing all the outputs attached to the fb |
7394371d CW |
2142 | * @fb_helper: the drm_fb_helper |
2143 | * | |
7394371d CW |
2144 | * Scan the connectors attached to the fb_helper and try to put together a |
2145 | * setup after *notification of a change in output configuration. | |
2146 | * | |
207fd329 DV |
2147 | * Called at runtime, takes the mode config locks to be able to check/change the |
2148 | * modeset configuration. Must be run from process context (which usually means | |
2149 | * either the output polling work or a work item launched from the driver's | |
2150 | * hotplug interrupt). | |
2151 | * | |
50c3dc97 DV |
2152 | * Note that drivers may call this even before calling |
2153 | * drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows | |
2154 | * for a race-free fbcon setup and will make sure that the fbdev emulation will | |
2155 | * not miss any hotplug events. | |
207fd329 | 2156 | * |
7394371d CW |
2157 | * RETURNS: |
2158 | * 0 on success and a non-zero error code otherwise. | |
2159 | */ | |
2160 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2161 | { |
7394371d | 2162 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 2163 | u32 max_width, max_height; |
5c4426a7 | 2164 | |
f64c5573 DV |
2165 | if (!drm_fbdev_emulation) |
2166 | return 0; | |
2167 | ||
89ced125 | 2168 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 2169 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2170 | fb_helper->delayed_hotplug = true; |
89ced125 | 2171 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 2172 | return 0; |
4abe3520 | 2173 | } |
eb1f8e4f | 2174 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2175 | |
eb1f8e4f DA |
2176 | max_width = fb_helper->fb->width; |
2177 | max_height = fb_helper->fb->height; | |
5c4426a7 | 2178 | |
51bbd276 | 2179 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
2180 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
2181 | ||
2182 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 2183 | drm_setup_crtcs(fb_helper); |
84849903 | 2184 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
2185 | drm_fb_helper_set_par(fb_helper->fbdev); |
2186 | ||
2187 | return 0; | |
5c4426a7 | 2188 | } |
eb1f8e4f | 2189 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2190 | |
6a108a14 | 2191 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2192 | * but the module doesn't depend on any fb console symbols. At least |
2193 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2194 | */ | |
70412cfa | 2195 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2196 | { |
70412cfa | 2197 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2198 | const char *name = "fbcon"; |
2199 | struct module *fbcon; | |
2200 | ||
2201 | mutex_lock(&module_mutex); | |
2202 | fbcon = find_module(name); | |
2203 | mutex_unlock(&module_mutex); | |
2204 | ||
2205 | if (!fbcon) | |
2206 | request_module_nowait(name); | |
70412cfa | 2207 | #endif |
3ce05168 DF |
2208 | return 0; |
2209 | } | |
70412cfa | 2210 | EXPORT_SYMBOL(drm_fb_helper_modinit); |