Line data Source code
1 : /*
2 : * Copyright (C) 2014 Red Hat
3 : * Copyright (C) 2014 Intel Corp.
4 : * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
5 : *
6 : * Permission is hereby granted, free of charge, to any person obtaining a
7 : * copy of this software and associated documentation files (the "Software"),
8 : * to deal in the Software without restriction, including without limitation
9 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 : * and/or sell copies of the Software, and to permit persons to whom the
11 : * Software is furnished to do so, subject to the following conditions:
12 : *
13 : * The above copyright notice and this permission notice shall be included in
14 : * all copies or substantial portions of the Software.
15 : *
16 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 : * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 : * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 : * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 : * OTHER DEALINGS IN THE SOFTWARE.
23 : *
24 : * Authors:
25 : * Rob Clark <robdclark@gmail.com>
26 : * Daniel Vetter <daniel.vetter@ffwll.ch>
27 : */
28 :
29 :
30 : #include <linux/sync_file.h>
31 :
32 : #include <drm/drm_atomic.h>
33 : #include <drm/drm_atomic_uapi.h>
34 : #include <drm/drm_blend.h>
35 : #include <drm/drm_bridge.h>
36 : #include <drm/drm_debugfs.h>
37 : #include <drm/drm_device.h>
38 : #include <drm/drm_drv.h>
39 : #include <drm/drm_file.h>
40 : #include <drm/drm_fourcc.h>
41 : #include <drm/drm_framebuffer.h>
42 : #include <drm/drm_mode.h>
43 : #include <drm/drm_print.h>
44 : #include <drm/drm_writeback.h>
45 :
46 : #include "drm_crtc_internal.h"
47 : #include "drm_internal.h"
48 :
49 0 : void __drm_crtc_commit_free(struct kref *kref)
50 : {
51 0 : struct drm_crtc_commit *commit =
52 0 : container_of(kref, struct drm_crtc_commit, ref);
53 :
54 0 : kfree(commit);
55 0 : }
56 : EXPORT_SYMBOL(__drm_crtc_commit_free);
57 :
58 : /**
59 : * drm_crtc_commit_wait - Waits for a commit to complete
60 : * @commit: &drm_crtc_commit to wait for
61 : *
62 : * Waits for a given &drm_crtc_commit to be programmed into the
63 : * hardware and flipped to.
64 : *
65 : * Returns:
66 : *
67 : * 0 on success, a negative error code otherwise.
68 : */
69 0 : int drm_crtc_commit_wait(struct drm_crtc_commit *commit)
70 : {
71 0 : unsigned long timeout = 10 * HZ;
72 : int ret;
73 :
74 0 : if (!commit)
75 : return 0;
76 :
77 0 : ret = wait_for_completion_timeout(&commit->hw_done, timeout);
78 0 : if (!ret) {
79 0 : drm_err(commit->crtc->dev, "hw_done timed out\n");
80 0 : return -ETIMEDOUT;
81 : }
82 :
83 : /*
84 : * Currently no support for overwriting flips, hence
85 : * stall for previous one to execute completely.
86 : */
87 0 : ret = wait_for_completion_timeout(&commit->flip_done, timeout);
88 0 : if (!ret) {
89 0 : drm_err(commit->crtc->dev, "flip_done timed out\n");
90 0 : return -ETIMEDOUT;
91 : }
92 :
93 : return 0;
94 : }
95 : EXPORT_SYMBOL(drm_crtc_commit_wait);
96 :
97 : /**
98 : * drm_atomic_state_default_release -
99 : * release memory initialized by drm_atomic_state_init
100 : * @state: atomic state
101 : *
102 : * Free all the memory allocated by drm_atomic_state_init.
103 : * This should only be used by drivers which are still subclassing
104 : * &drm_atomic_state and haven't switched to &drm_private_state yet.
105 : */
106 0 : void drm_atomic_state_default_release(struct drm_atomic_state *state)
107 : {
108 0 : kfree(state->connectors);
109 0 : kfree(state->crtcs);
110 0 : kfree(state->planes);
111 0 : kfree(state->private_objs);
112 0 : }
113 : EXPORT_SYMBOL(drm_atomic_state_default_release);
114 :
115 : /**
116 : * drm_atomic_state_init - init new atomic state
117 : * @dev: DRM device
118 : * @state: atomic state
119 : *
120 : * Default implementation for filling in a new atomic state.
121 : * This should only be used by drivers which are still subclassing
122 : * &drm_atomic_state and haven't switched to &drm_private_state yet.
123 : */
124 : int
125 0 : drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
126 : {
127 0 : kref_init(&state->ref);
128 :
129 : /* TODO legacy paths should maybe do a better job about
130 : * setting this appropriately?
131 : */
132 0 : state->allow_modeset = true;
133 :
134 0 : state->crtcs = kcalloc(dev->mode_config.num_crtc,
135 : sizeof(*state->crtcs), GFP_KERNEL);
136 0 : if (!state->crtcs)
137 : goto fail;
138 0 : state->planes = kcalloc(dev->mode_config.num_total_plane,
139 : sizeof(*state->planes), GFP_KERNEL);
140 0 : if (!state->planes)
141 : goto fail;
142 :
143 0 : state->dev = dev;
144 :
145 0 : drm_dbg_atomic(dev, "Allocated atomic state %p\n", state);
146 :
147 0 : return 0;
148 : fail:
149 0 : drm_atomic_state_default_release(state);
150 0 : return -ENOMEM;
151 : }
152 : EXPORT_SYMBOL(drm_atomic_state_init);
153 :
154 : /**
155 : * drm_atomic_state_alloc - allocate atomic state
156 : * @dev: DRM device
157 : *
158 : * This allocates an empty atomic state to track updates.
159 : */
160 : struct drm_atomic_state *
161 0 : drm_atomic_state_alloc(struct drm_device *dev)
162 : {
163 0 : struct drm_mode_config *config = &dev->mode_config;
164 :
165 0 : if (!config->funcs->atomic_state_alloc) {
166 : struct drm_atomic_state *state;
167 :
168 0 : state = kzalloc(sizeof(*state), GFP_KERNEL);
169 0 : if (!state)
170 : return NULL;
171 0 : if (drm_atomic_state_init(dev, state) < 0) {
172 0 : kfree(state);
173 0 : return NULL;
174 : }
175 : return state;
176 : }
177 :
178 0 : return config->funcs->atomic_state_alloc(dev);
179 : }
180 : EXPORT_SYMBOL(drm_atomic_state_alloc);
181 :
182 : /**
183 : * drm_atomic_state_default_clear - clear base atomic state
184 : * @state: atomic state
185 : *
186 : * Default implementation for clearing atomic state.
187 : * This should only be used by drivers which are still subclassing
188 : * &drm_atomic_state and haven't switched to &drm_private_state yet.
189 : */
190 0 : void drm_atomic_state_default_clear(struct drm_atomic_state *state)
191 : {
192 0 : struct drm_device *dev = state->dev;
193 0 : struct drm_mode_config *config = &dev->mode_config;
194 : int i;
195 :
196 0 : drm_dbg_atomic(dev, "Clearing atomic state %p\n", state);
197 :
198 0 : for (i = 0; i < state->num_connector; i++) {
199 0 : struct drm_connector *connector = state->connectors[i].ptr;
200 :
201 0 : if (!connector)
202 0 : continue;
203 :
204 0 : connector->funcs->atomic_destroy_state(connector,
205 : state->connectors[i].state);
206 0 : state->connectors[i].ptr = NULL;
207 0 : state->connectors[i].state = NULL;
208 0 : state->connectors[i].old_state = NULL;
209 0 : state->connectors[i].new_state = NULL;
210 : drm_connector_put(connector);
211 : }
212 :
213 0 : for (i = 0; i < config->num_crtc; i++) {
214 0 : struct drm_crtc *crtc = state->crtcs[i].ptr;
215 :
216 0 : if (!crtc)
217 0 : continue;
218 :
219 0 : crtc->funcs->atomic_destroy_state(crtc,
220 : state->crtcs[i].state);
221 :
222 0 : state->crtcs[i].ptr = NULL;
223 0 : state->crtcs[i].state = NULL;
224 0 : state->crtcs[i].old_state = NULL;
225 0 : state->crtcs[i].new_state = NULL;
226 :
227 0 : if (state->crtcs[i].commit) {
228 0 : drm_crtc_commit_put(state->crtcs[i].commit);
229 0 : state->crtcs[i].commit = NULL;
230 : }
231 : }
232 :
233 0 : for (i = 0; i < config->num_total_plane; i++) {
234 0 : struct drm_plane *plane = state->planes[i].ptr;
235 :
236 0 : if (!plane)
237 0 : continue;
238 :
239 0 : plane->funcs->atomic_destroy_state(plane,
240 : state->planes[i].state);
241 0 : state->planes[i].ptr = NULL;
242 0 : state->planes[i].state = NULL;
243 0 : state->planes[i].old_state = NULL;
244 0 : state->planes[i].new_state = NULL;
245 : }
246 :
247 0 : for (i = 0; i < state->num_private_objs; i++) {
248 0 : struct drm_private_obj *obj = state->private_objs[i].ptr;
249 :
250 0 : obj->funcs->atomic_destroy_state(obj,
251 : state->private_objs[i].state);
252 0 : state->private_objs[i].ptr = NULL;
253 0 : state->private_objs[i].state = NULL;
254 0 : state->private_objs[i].old_state = NULL;
255 0 : state->private_objs[i].new_state = NULL;
256 : }
257 0 : state->num_private_objs = 0;
258 :
259 0 : if (state->fake_commit) {
260 0 : drm_crtc_commit_put(state->fake_commit);
261 0 : state->fake_commit = NULL;
262 : }
263 0 : }
264 : EXPORT_SYMBOL(drm_atomic_state_default_clear);
265 :
266 : /**
267 : * drm_atomic_state_clear - clear state object
268 : * @state: atomic state
269 : *
270 : * When the w/w mutex algorithm detects a deadlock we need to back off and drop
271 : * all locks. So someone else could sneak in and change the current modeset
272 : * configuration. Which means that all the state assembled in @state is no
273 : * longer an atomic update to the current state, but to some arbitrary earlier
274 : * state. Which could break assumptions the driver's
275 : * &drm_mode_config_funcs.atomic_check likely relies on.
276 : *
277 : * Hence we must clear all cached state and completely start over, using this
278 : * function.
279 : */
280 0 : void drm_atomic_state_clear(struct drm_atomic_state *state)
281 : {
282 0 : struct drm_device *dev = state->dev;
283 0 : struct drm_mode_config *config = &dev->mode_config;
284 :
285 0 : if (config->funcs->atomic_state_clear)
286 0 : config->funcs->atomic_state_clear(state);
287 : else
288 0 : drm_atomic_state_default_clear(state);
289 0 : }
290 : EXPORT_SYMBOL(drm_atomic_state_clear);
291 :
292 : /**
293 : * __drm_atomic_state_free - free all memory for an atomic state
294 : * @ref: This atomic state to deallocate
295 : *
296 : * This frees all memory associated with an atomic state, including all the
297 : * per-object state for planes, CRTCs and connectors.
298 : */
299 0 : void __drm_atomic_state_free(struct kref *ref)
300 : {
301 0 : struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
302 0 : struct drm_mode_config *config = &state->dev->mode_config;
303 :
304 0 : drm_atomic_state_clear(state);
305 :
306 0 : drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state);
307 :
308 0 : if (config->funcs->atomic_state_free) {
309 0 : config->funcs->atomic_state_free(state);
310 : } else {
311 0 : drm_atomic_state_default_release(state);
312 0 : kfree(state);
313 : }
314 0 : }
315 : EXPORT_SYMBOL(__drm_atomic_state_free);
316 :
317 : /**
318 : * drm_atomic_get_crtc_state - get CRTC state
319 : * @state: global atomic state object
320 : * @crtc: CRTC to get state object for
321 : *
322 : * This function returns the CRTC state for the given CRTC, allocating it if
323 : * needed. It will also grab the relevant CRTC lock to make sure that the state
324 : * is consistent.
325 : *
326 : * WARNING: Drivers may only add new CRTC states to a @state if
327 : * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit
328 : * not created by userspace through an IOCTL call.
329 : *
330 : * Returns:
331 : *
332 : * Either the allocated state or the error code encoded into the pointer. When
333 : * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
334 : * entire atomic sequence must be restarted. All other errors are fatal.
335 : */
336 : struct drm_crtc_state *
337 0 : drm_atomic_get_crtc_state(struct drm_atomic_state *state,
338 : struct drm_crtc *crtc)
339 : {
340 0 : int ret, index = drm_crtc_index(crtc);
341 : struct drm_crtc_state *crtc_state;
342 :
343 0 : WARN_ON(!state->acquire_ctx);
344 :
345 0 : crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
346 0 : if (crtc_state)
347 : return crtc_state;
348 :
349 0 : ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
350 0 : if (ret)
351 0 : return ERR_PTR(ret);
352 :
353 0 : crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
354 0 : if (!crtc_state)
355 : return ERR_PTR(-ENOMEM);
356 :
357 0 : state->crtcs[index].state = crtc_state;
358 0 : state->crtcs[index].old_state = crtc->state;
359 0 : state->crtcs[index].new_state = crtc_state;
360 0 : state->crtcs[index].ptr = crtc;
361 0 : crtc_state->state = state;
362 :
363 0 : drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n",
364 : crtc->base.id, crtc->name, crtc_state, state);
365 :
366 0 : return crtc_state;
367 : }
368 : EXPORT_SYMBOL(drm_atomic_get_crtc_state);
369 :
370 0 : static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
371 : const struct drm_crtc_state *new_crtc_state)
372 : {
373 0 : struct drm_crtc *crtc = new_crtc_state->crtc;
374 :
375 : /* NOTE: we explicitly don't enforce constraints such as primary
376 : * layer covering entire screen, since that is something we want
377 : * to allow (on hw that supports it). For hw that does not, it
378 : * should be checked in driver's crtc->atomic_check() vfunc.
379 : *
380 : * TODO: Add generic modeset state checks once we support those.
381 : */
382 :
383 0 : if (new_crtc_state->active && !new_crtc_state->enable) {
384 0 : drm_dbg_atomic(crtc->dev,
385 : "[CRTC:%d:%s] active without enabled\n",
386 : crtc->base.id, crtc->name);
387 : return -EINVAL;
388 : }
389 :
390 : /* The state->enable vs. state->mode_blob checks can be WARN_ON,
391 : * as this is a kernel-internal detail that userspace should never
392 : * be able to trigger.
393 : */
394 0 : if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
395 0 : WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
396 0 : drm_dbg_atomic(crtc->dev,
397 : "[CRTC:%d:%s] enabled without mode blob\n",
398 : crtc->base.id, crtc->name);
399 : return -EINVAL;
400 : }
401 :
402 0 : if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
403 0 : WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
404 0 : drm_dbg_atomic(crtc->dev,
405 : "[CRTC:%d:%s] disabled with mode blob\n",
406 : crtc->base.id, crtc->name);
407 : return -EINVAL;
408 : }
409 :
410 : /*
411 : * Reject event generation for when a CRTC is off and stays off.
412 : * It wouldn't be hard to implement this, but userspace has a track
413 : * record of happily burning through 100% cpu (or worse, crash) when the
414 : * display pipe is suspended. To avoid all that fun just reject updates
415 : * that ask for events since likely that indicates a bug in the
416 : * compositor's drawing loop. This is consistent with the vblank IOCTL
417 : * and legacy page_flip IOCTL which also reject service on a disabled
418 : * pipe.
419 : */
420 0 : if (new_crtc_state->event &&
421 0 : !new_crtc_state->active && !old_crtc_state->active) {
422 0 : drm_dbg_atomic(crtc->dev,
423 : "[CRTC:%d:%s] requesting event but off\n",
424 : crtc->base.id, crtc->name);
425 : return -EINVAL;
426 : }
427 :
428 : return 0;
429 : }
430 :
431 0 : static void drm_atomic_crtc_print_state(struct drm_printer *p,
432 : const struct drm_crtc_state *state)
433 : {
434 0 : struct drm_crtc *crtc = state->crtc;
435 :
436 0 : drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
437 0 : drm_printf(p, "\tenable=%d\n", state->enable);
438 0 : drm_printf(p, "\tactive=%d\n", state->active);
439 0 : drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
440 0 : drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
441 0 : drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
442 0 : drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
443 0 : drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
444 0 : drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
445 0 : drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
446 0 : drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
447 0 : drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
448 0 : drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
449 :
450 0 : if (crtc->funcs->atomic_print_state)
451 0 : crtc->funcs->atomic_print_state(p, state);
452 0 : }
453 :
454 0 : static int drm_atomic_connector_check(struct drm_connector *connector,
455 : struct drm_connector_state *state)
456 : {
457 : struct drm_crtc_state *crtc_state;
458 0 : struct drm_writeback_job *writeback_job = state->writeback_job;
459 0 : const struct drm_display_info *info = &connector->display_info;
460 :
461 0 : state->max_bpc = info->bpc ? info->bpc : 8;
462 0 : if (connector->max_bpc_property)
463 0 : state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
464 :
465 0 : if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
466 : return 0;
467 :
468 0 : if (writeback_job->fb && !state->crtc) {
469 0 : drm_dbg_atomic(connector->dev,
470 : "[CONNECTOR:%d:%s] framebuffer without CRTC\n",
471 : connector->base.id, connector->name);
472 0 : return -EINVAL;
473 : }
474 :
475 0 : if (state->crtc)
476 0 : crtc_state = drm_atomic_get_existing_crtc_state(state->state,
477 : state->crtc);
478 :
479 0 : if (writeback_job->fb && !crtc_state->active) {
480 0 : drm_dbg_atomic(connector->dev,
481 : "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
482 : connector->base.id, connector->name,
483 : state->crtc->base.id);
484 0 : return -EINVAL;
485 : }
486 :
487 0 : if (!writeback_job->fb) {
488 0 : if (writeback_job->out_fence) {
489 0 : drm_dbg_atomic(connector->dev,
490 : "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
491 : connector->base.id, connector->name);
492 0 : return -EINVAL;
493 : }
494 :
495 0 : drm_writeback_cleanup_job(writeback_job);
496 0 : state->writeback_job = NULL;
497 : }
498 :
499 : return 0;
500 : }
501 :
502 : /**
503 : * drm_atomic_get_plane_state - get plane state
504 : * @state: global atomic state object
505 : * @plane: plane to get state object for
506 : *
507 : * This function returns the plane state for the given plane, allocating it if
508 : * needed. It will also grab the relevant plane lock to make sure that the state
509 : * is consistent.
510 : *
511 : * Returns:
512 : *
513 : * Either the allocated state or the error code encoded into the pointer. When
514 : * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
515 : * entire atomic sequence must be restarted. All other errors are fatal.
516 : */
517 : struct drm_plane_state *
518 0 : drm_atomic_get_plane_state(struct drm_atomic_state *state,
519 : struct drm_plane *plane)
520 : {
521 0 : int ret, index = drm_plane_index(plane);
522 : struct drm_plane_state *plane_state;
523 :
524 0 : WARN_ON(!state->acquire_ctx);
525 :
526 : /* the legacy pointers should never be set */
527 0 : WARN_ON(plane->fb);
528 0 : WARN_ON(plane->old_fb);
529 0 : WARN_ON(plane->crtc);
530 :
531 0 : plane_state = drm_atomic_get_existing_plane_state(state, plane);
532 0 : if (plane_state)
533 : return plane_state;
534 :
535 0 : ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
536 0 : if (ret)
537 0 : return ERR_PTR(ret);
538 :
539 0 : plane_state = plane->funcs->atomic_duplicate_state(plane);
540 0 : if (!plane_state)
541 : return ERR_PTR(-ENOMEM);
542 :
543 0 : state->planes[index].state = plane_state;
544 0 : state->planes[index].ptr = plane;
545 0 : state->planes[index].old_state = plane->state;
546 0 : state->planes[index].new_state = plane_state;
547 0 : plane_state->state = state;
548 :
549 0 : drm_dbg_atomic(plane->dev, "Added [PLANE:%d:%s] %p state to %p\n",
550 : plane->base.id, plane->name, plane_state, state);
551 :
552 0 : if (plane_state->crtc) {
553 : struct drm_crtc_state *crtc_state;
554 :
555 0 : crtc_state = drm_atomic_get_crtc_state(state,
556 : plane_state->crtc);
557 0 : if (IS_ERR(crtc_state))
558 : return ERR_CAST(crtc_state);
559 : }
560 :
561 : return plane_state;
562 : }
563 : EXPORT_SYMBOL(drm_atomic_get_plane_state);
564 :
565 : static bool
566 : plane_switching_crtc(const struct drm_plane_state *old_plane_state,
567 : const struct drm_plane_state *new_plane_state)
568 : {
569 0 : if (!old_plane_state->crtc || !new_plane_state->crtc)
570 : return false;
571 :
572 0 : if (old_plane_state->crtc == new_plane_state->crtc)
573 : return false;
574 :
575 : /* This could be refined, but currently there's no helper or driver code
576 : * to implement direct switching of active planes nor userspace to take
577 : * advantage of more direct plane switching without the intermediate
578 : * full OFF state.
579 : */
580 : return true;
581 : }
582 :
583 : /**
584 : * drm_atomic_plane_check - check plane state
585 : * @old_plane_state: old plane state to check
586 : * @new_plane_state: new plane state to check
587 : *
588 : * Provides core sanity checks for plane state.
589 : *
590 : * RETURNS:
591 : * Zero on success, error code on failure
592 : */
593 0 : static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
594 : const struct drm_plane_state *new_plane_state)
595 : {
596 0 : struct drm_plane *plane = new_plane_state->plane;
597 0 : struct drm_crtc *crtc = new_plane_state->crtc;
598 0 : const struct drm_framebuffer *fb = new_plane_state->fb;
599 : unsigned int fb_width, fb_height;
600 : struct drm_mode_rect *clips;
601 : uint32_t num_clips;
602 : int ret;
603 :
604 : /* either *both* CRTC and FB must be set, or neither */
605 0 : if (crtc && !fb) {
606 0 : drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n",
607 : plane->base.id, plane->name);
608 0 : return -EINVAL;
609 0 : } else if (fb && !crtc) {
610 0 : drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] FB set but no CRTC\n",
611 : plane->base.id, plane->name);
612 0 : return -EINVAL;
613 : }
614 :
615 : /* if disabled, we don't care about the rest of the state: */
616 0 : if (!crtc)
617 : return 0;
618 :
619 : /* Check whether this plane is usable on this CRTC */
620 0 : if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
621 0 : drm_dbg_atomic(plane->dev,
622 : "Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
623 : crtc->base.id, crtc->name,
624 : plane->base.id, plane->name);
625 0 : return -EINVAL;
626 : }
627 :
628 : /* Check whether this plane supports the fb pixel format. */
629 0 : ret = drm_plane_check_pixel_format(plane, fb->format->format,
630 : fb->modifier);
631 0 : if (ret) {
632 0 : drm_dbg_atomic(plane->dev,
633 : "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
634 : plane->base.id, plane->name,
635 : &fb->format->format, fb->modifier);
636 0 : return ret;
637 : }
638 :
639 : /* Give drivers some help against integer overflows */
640 0 : if (new_plane_state->crtc_w > INT_MAX ||
641 0 : new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
642 0 : new_plane_state->crtc_h > INT_MAX ||
643 0 : new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
644 0 : drm_dbg_atomic(plane->dev,
645 : "[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
646 : plane->base.id, plane->name,
647 : new_plane_state->crtc_w, new_plane_state->crtc_h,
648 : new_plane_state->crtc_x, new_plane_state->crtc_y);
649 0 : return -ERANGE;
650 : }
651 :
652 0 : fb_width = fb->width << 16;
653 0 : fb_height = fb->height << 16;
654 :
655 : /* Make sure source coordinates are inside the fb. */
656 0 : if (new_plane_state->src_w > fb_width ||
657 0 : new_plane_state->src_x > fb_width - new_plane_state->src_w ||
658 0 : new_plane_state->src_h > fb_height ||
659 0 : new_plane_state->src_y > fb_height - new_plane_state->src_h) {
660 0 : drm_dbg_atomic(plane->dev,
661 : "[PLANE:%d:%s] invalid source coordinates "
662 : "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
663 : plane->base.id, plane->name,
664 : new_plane_state->src_w >> 16,
665 : ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
666 : new_plane_state->src_h >> 16,
667 : ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
668 : new_plane_state->src_x >> 16,
669 : ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
670 : new_plane_state->src_y >> 16,
671 : ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
672 : fb->width, fb->height);
673 0 : return -ENOSPC;
674 : }
675 :
676 0 : clips = __drm_plane_get_damage_clips(new_plane_state);
677 0 : num_clips = drm_plane_get_damage_clips_count(new_plane_state);
678 :
679 : /* Make sure damage clips are valid and inside the fb. */
680 0 : while (num_clips > 0) {
681 0 : if (clips->x1 >= clips->x2 ||
682 0 : clips->y1 >= clips->y2 ||
683 0 : clips->x1 < 0 ||
684 0 : clips->y1 < 0 ||
685 0 : clips->x2 > fb_width ||
686 0 : clips->y2 > fb_height) {
687 0 : drm_dbg_atomic(plane->dev,
688 : "[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
689 : plane->base.id, plane->name, clips->x1,
690 : clips->y1, clips->x2, clips->y2);
691 0 : return -EINVAL;
692 : }
693 0 : clips++;
694 0 : num_clips--;
695 : }
696 :
697 0 : if (plane_switching_crtc(old_plane_state, new_plane_state)) {
698 0 : drm_dbg_atomic(plane->dev,
699 : "[PLANE:%d:%s] switching CRTC directly\n",
700 : plane->base.id, plane->name);
701 0 : return -EINVAL;
702 : }
703 :
704 : return 0;
705 : }
706 :
707 0 : static void drm_atomic_plane_print_state(struct drm_printer *p,
708 : const struct drm_plane_state *state)
709 : {
710 0 : struct drm_plane *plane = state->plane;
711 0 : struct drm_rect src = drm_plane_state_src(state);
712 0 : struct drm_rect dest = drm_plane_state_dest(state);
713 :
714 0 : drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
715 0 : drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
716 0 : drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
717 0 : if (state->fb)
718 0 : drm_framebuffer_print_info(p, 2, state->fb);
719 0 : drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
720 0 : drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
721 0 : drm_printf(p, "\trotation=%x\n", state->rotation);
722 0 : drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
723 0 : drm_printf(p, "\tcolor-encoding=%s\n",
724 : drm_get_color_encoding_name(state->color_encoding));
725 0 : drm_printf(p, "\tcolor-range=%s\n",
726 : drm_get_color_range_name(state->color_range));
727 :
728 0 : if (plane->funcs->atomic_print_state)
729 0 : plane->funcs->atomic_print_state(p, state);
730 0 : }
731 :
732 : /**
733 : * DOC: handling driver private state
734 : *
735 : * Very often the DRM objects exposed to userspace in the atomic modeset api
736 : * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
737 : * underlying hardware. Especially for any kind of shared resources (e.g. shared
738 : * clocks, scaler units, bandwidth and fifo limits shared among a group of
739 : * planes or CRTCs, and so on) it makes sense to model these as independent
740 : * objects. Drivers then need to do similar state tracking and commit ordering for
741 : * such private (since not exposed to userspace) objects as the atomic core and
742 : * helpers already provide for connectors, planes and CRTCs.
743 : *
744 : * To make this easier on drivers the atomic core provides some support to track
745 : * driver private state objects using struct &drm_private_obj, with the
746 : * associated state struct &drm_private_state.
747 : *
748 : * Similar to userspace-exposed objects, private state structures can be
749 : * acquired by calling drm_atomic_get_private_obj_state(). This also takes care
750 : * of locking, hence drivers should not have a need to call drm_modeset_lock()
751 : * directly. Sequence of the actual hardware state commit is not handled,
752 : * drivers might need to keep track of struct drm_crtc_commit within subclassed
753 : * structure of &drm_private_state as necessary, e.g. similar to
754 : * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
755 : *
756 : * All private state structures contained in a &drm_atomic_state update can be
757 : * iterated using for_each_oldnew_private_obj_in_state(),
758 : * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
759 : * Drivers are recommended to wrap these for each type of driver private state
760 : * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
761 : * least if they want to iterate over all objects of a given type.
762 : *
763 : * An earlier way to handle driver private state was by subclassing struct
764 : * &drm_atomic_state. But since that encourages non-standard ways to implement
765 : * the check/commit split atomic requires (by using e.g. "check and rollback or
766 : * commit instead" of "duplicate state, check, then either commit or release
767 : * duplicated state) it is deprecated in favour of using &drm_private_state.
768 : */
769 :
770 : /**
771 : * drm_atomic_private_obj_init - initialize private object
772 : * @dev: DRM device this object will be attached to
773 : * @obj: private object
774 : * @state: initial private object state
775 : * @funcs: pointer to the struct of function pointers that identify the object
776 : * type
777 : *
778 : * Initialize the private object, which can be embedded into any
779 : * driver private object that needs its own atomic state.
780 : */
781 : void
782 0 : drm_atomic_private_obj_init(struct drm_device *dev,
783 : struct drm_private_obj *obj,
784 : struct drm_private_state *state,
785 : const struct drm_private_state_funcs *funcs)
786 : {
787 0 : memset(obj, 0, sizeof(*obj));
788 :
789 0 : drm_modeset_lock_init(&obj->lock);
790 :
791 0 : obj->state = state;
792 0 : obj->funcs = funcs;
793 0 : list_add_tail(&obj->head, &dev->mode_config.privobj_list);
794 :
795 0 : state->obj = obj;
796 0 : }
797 : EXPORT_SYMBOL(drm_atomic_private_obj_init);
798 :
799 : /**
800 : * drm_atomic_private_obj_fini - finalize private object
801 : * @obj: private object
802 : *
803 : * Finalize the private object.
804 : */
805 : void
806 0 : drm_atomic_private_obj_fini(struct drm_private_obj *obj)
807 : {
808 0 : list_del(&obj->head);
809 0 : obj->funcs->atomic_destroy_state(obj, obj->state);
810 0 : drm_modeset_lock_fini(&obj->lock);
811 0 : }
812 : EXPORT_SYMBOL(drm_atomic_private_obj_fini);
813 :
814 : /**
815 : * drm_atomic_get_private_obj_state - get private object state
816 : * @state: global atomic state
817 : * @obj: private object to get the state for
818 : *
819 : * This function returns the private object state for the given private object,
820 : * allocating the state if needed. It will also grab the relevant private
821 : * object lock to make sure that the state is consistent.
822 : *
823 : * RETURNS:
824 : *
825 : * Either the allocated state or the error code encoded into a pointer.
826 : */
827 : struct drm_private_state *
828 0 : drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
829 : struct drm_private_obj *obj)
830 : {
831 : int index, num_objs, i, ret;
832 : size_t size;
833 : struct __drm_private_objs_state *arr;
834 : struct drm_private_state *obj_state;
835 :
836 0 : for (i = 0; i < state->num_private_objs; i++)
837 0 : if (obj == state->private_objs[i].ptr)
838 0 : return state->private_objs[i].state;
839 :
840 0 : ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
841 0 : if (ret)
842 0 : return ERR_PTR(ret);
843 :
844 0 : num_objs = state->num_private_objs + 1;
845 0 : size = sizeof(*state->private_objs) * num_objs;
846 0 : arr = krealloc(state->private_objs, size, GFP_KERNEL);
847 0 : if (!arr)
848 : return ERR_PTR(-ENOMEM);
849 :
850 0 : state->private_objs = arr;
851 0 : index = state->num_private_objs;
852 0 : memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
853 :
854 0 : obj_state = obj->funcs->atomic_duplicate_state(obj);
855 0 : if (!obj_state)
856 : return ERR_PTR(-ENOMEM);
857 :
858 0 : state->private_objs[index].state = obj_state;
859 0 : state->private_objs[index].old_state = obj->state;
860 0 : state->private_objs[index].new_state = obj_state;
861 0 : state->private_objs[index].ptr = obj;
862 0 : obj_state->state = state;
863 :
864 0 : state->num_private_objs = num_objs;
865 :
866 0 : drm_dbg_atomic(state->dev,
867 : "Added new private object %p state %p to %p\n",
868 : obj, obj_state, state);
869 :
870 0 : return obj_state;
871 : }
872 : EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
873 :
874 : /**
875 : * drm_atomic_get_old_private_obj_state
876 : * @state: global atomic state object
877 : * @obj: private_obj to grab
878 : *
879 : * This function returns the old private object state for the given private_obj,
880 : * or NULL if the private_obj is not part of the global atomic state.
881 : */
882 : struct drm_private_state *
883 0 : drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state,
884 : struct drm_private_obj *obj)
885 : {
886 : int i;
887 :
888 0 : for (i = 0; i < state->num_private_objs; i++)
889 0 : if (obj == state->private_objs[i].ptr)
890 0 : return state->private_objs[i].old_state;
891 :
892 : return NULL;
893 : }
894 : EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
895 :
896 : /**
897 : * drm_atomic_get_new_private_obj_state
898 : * @state: global atomic state object
899 : * @obj: private_obj to grab
900 : *
901 : * This function returns the new private object state for the given private_obj,
902 : * or NULL if the private_obj is not part of the global atomic state.
903 : */
904 : struct drm_private_state *
905 0 : drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state,
906 : struct drm_private_obj *obj)
907 : {
908 : int i;
909 :
910 0 : for (i = 0; i < state->num_private_objs; i++)
911 0 : if (obj == state->private_objs[i].ptr)
912 0 : return state->private_objs[i].new_state;
913 :
914 : return NULL;
915 : }
916 : EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
917 :
918 : /**
919 : * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
920 : * @state: Atomic state
921 : * @encoder: The encoder to fetch the connector state for
922 : *
923 : * This function finds and returns the connector that was connected to @encoder
924 : * as specified by the @state.
925 : *
926 : * If there is no connector in @state which previously had @encoder connected to
927 : * it, this function will return NULL. While this may seem like an invalid use
928 : * case, it is sometimes useful to differentiate commits which had no prior
929 : * connectors attached to @encoder vs ones that did (and to inspect their
930 : * state). This is especially true in enable hooks because the pipeline has
931 : * changed.
932 : *
933 : * Returns: The old connector connected to @encoder, or NULL if the encoder is
934 : * not connected.
935 : */
936 : struct drm_connector *
937 0 : drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state,
938 : struct drm_encoder *encoder)
939 : {
940 : struct drm_connector_state *conn_state;
941 : struct drm_connector *connector;
942 : unsigned int i;
943 :
944 0 : for_each_old_connector_in_state(state, connector, conn_state, i) {
945 0 : if (conn_state->best_encoder == encoder)
946 : return connector;
947 : }
948 :
949 : return NULL;
950 : }
951 : EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
952 :
953 : /**
954 : * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
955 : * @state: Atomic state
956 : * @encoder: The encoder to fetch the connector state for
957 : *
958 : * This function finds and returns the connector that will be connected to
959 : * @encoder as specified by the @state.
960 : *
961 : * If there is no connector in @state which will have @encoder connected to it,
962 : * this function will return NULL. While this may seem like an invalid use case,
963 : * it is sometimes useful to differentiate commits which have no connectors
964 : * attached to @encoder vs ones that do (and to inspect their state). This is
965 : * especially true in disable hooks because the pipeline will change.
966 : *
967 : * Returns: The new connector connected to @encoder, or NULL if the encoder is
968 : * not connected.
969 : */
970 : struct drm_connector *
971 0 : drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,
972 : struct drm_encoder *encoder)
973 : {
974 : struct drm_connector_state *conn_state;
975 : struct drm_connector *connector;
976 : unsigned int i;
977 :
978 0 : for_each_new_connector_in_state(state, connector, conn_state, i) {
979 0 : if (conn_state->best_encoder == encoder)
980 : return connector;
981 : }
982 :
983 : return NULL;
984 : }
985 : EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
986 :
987 : /**
988 : * drm_atomic_get_connector_state - get connector state
989 : * @state: global atomic state object
990 : * @connector: connector to get state object for
991 : *
992 : * This function returns the connector state for the given connector,
993 : * allocating it if needed. It will also grab the relevant connector lock to
994 : * make sure that the state is consistent.
995 : *
996 : * Returns:
997 : *
998 : * Either the allocated state or the error code encoded into the pointer. When
999 : * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1000 : * entire atomic sequence must be restarted. All other errors are fatal.
1001 : */
1002 : struct drm_connector_state *
1003 0 : drm_atomic_get_connector_state(struct drm_atomic_state *state,
1004 : struct drm_connector *connector)
1005 : {
1006 : int ret, index;
1007 0 : struct drm_mode_config *config = &connector->dev->mode_config;
1008 : struct drm_connector_state *connector_state;
1009 :
1010 0 : WARN_ON(!state->acquire_ctx);
1011 :
1012 0 : ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1013 0 : if (ret)
1014 0 : return ERR_PTR(ret);
1015 :
1016 0 : index = drm_connector_index(connector);
1017 :
1018 0 : if (index >= state->num_connector) {
1019 : struct __drm_connnectors_state *c;
1020 0 : int alloc = max(index + 1, config->num_connector);
1021 :
1022 0 : c = krealloc_array(state->connectors, alloc,
1023 : sizeof(*state->connectors), GFP_KERNEL);
1024 0 : if (!c)
1025 : return ERR_PTR(-ENOMEM);
1026 :
1027 0 : state->connectors = c;
1028 0 : memset(&state->connectors[state->num_connector], 0,
1029 0 : sizeof(*state->connectors) * (alloc - state->num_connector));
1030 :
1031 0 : state->num_connector = alloc;
1032 : }
1033 :
1034 0 : if (state->connectors[index].state)
1035 : return state->connectors[index].state;
1036 :
1037 0 : connector_state = connector->funcs->atomic_duplicate_state(connector);
1038 0 : if (!connector_state)
1039 : return ERR_PTR(-ENOMEM);
1040 :
1041 0 : drm_connector_get(connector);
1042 0 : state->connectors[index].state = connector_state;
1043 0 : state->connectors[index].old_state = connector->state;
1044 0 : state->connectors[index].new_state = connector_state;
1045 0 : state->connectors[index].ptr = connector;
1046 0 : connector_state->state = state;
1047 :
1048 0 : drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n",
1049 : connector->base.id, connector->name,
1050 : connector_state, state);
1051 :
1052 0 : if (connector_state->crtc) {
1053 : struct drm_crtc_state *crtc_state;
1054 :
1055 0 : crtc_state = drm_atomic_get_crtc_state(state,
1056 : connector_state->crtc);
1057 0 : if (IS_ERR(crtc_state))
1058 : return ERR_CAST(crtc_state);
1059 : }
1060 :
1061 : return connector_state;
1062 : }
1063 : EXPORT_SYMBOL(drm_atomic_get_connector_state);
1064 :
1065 0 : static void drm_atomic_connector_print_state(struct drm_printer *p,
1066 : const struct drm_connector_state *state)
1067 : {
1068 0 : struct drm_connector *connector = state->connector;
1069 :
1070 0 : drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1071 0 : drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1072 0 : drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1073 0 : drm_printf(p, "\tmax_requested_bpc=%d\n", state->max_requested_bpc);
1074 :
1075 0 : if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1076 0 : if (state->writeback_job && state->writeback_job->fb)
1077 0 : drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1078 :
1079 0 : if (connector->funcs->atomic_print_state)
1080 0 : connector->funcs->atomic_print_state(p, state);
1081 0 : }
1082 :
1083 : /**
1084 : * drm_atomic_get_bridge_state - get bridge state
1085 : * @state: global atomic state object
1086 : * @bridge: bridge to get state object for
1087 : *
1088 : * This function returns the bridge state for the given bridge, allocating it
1089 : * if needed. It will also grab the relevant bridge lock to make sure that the
1090 : * state is consistent.
1091 : *
1092 : * Returns:
1093 : *
1094 : * Either the allocated state or the error code encoded into the pointer. When
1095 : * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1096 : * entire atomic sequence must be restarted.
1097 : */
1098 : struct drm_bridge_state *
1099 0 : drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1100 : struct drm_bridge *bridge)
1101 : {
1102 : struct drm_private_state *obj_state;
1103 :
1104 0 : obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
1105 0 : if (IS_ERR(obj_state))
1106 : return ERR_CAST(obj_state);
1107 :
1108 : return drm_priv_to_bridge_state(obj_state);
1109 : }
1110 : EXPORT_SYMBOL(drm_atomic_get_bridge_state);
1111 :
1112 : /**
1113 : * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
1114 : * @state: global atomic state object
1115 : * @bridge: bridge to grab
1116 : *
1117 : * This function returns the old bridge state for the given bridge, or NULL if
1118 : * the bridge is not part of the global atomic state.
1119 : */
1120 : struct drm_bridge_state *
1121 0 : drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,
1122 : struct drm_bridge *bridge)
1123 : {
1124 : struct drm_private_state *obj_state;
1125 :
1126 0 : obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
1127 0 : if (!obj_state)
1128 : return NULL;
1129 :
1130 : return drm_priv_to_bridge_state(obj_state);
1131 : }
1132 : EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
1133 :
1134 : /**
1135 : * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
1136 : * @state: global atomic state object
1137 : * @bridge: bridge to grab
1138 : *
1139 : * This function returns the new bridge state for the given bridge, or NULL if
1140 : * the bridge is not part of the global atomic state.
1141 : */
1142 : struct drm_bridge_state *
1143 0 : drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state,
1144 : struct drm_bridge *bridge)
1145 : {
1146 : struct drm_private_state *obj_state;
1147 :
1148 0 : obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
1149 0 : if (!obj_state)
1150 : return NULL;
1151 :
1152 0 : return drm_priv_to_bridge_state(obj_state);
1153 : }
1154 : EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
1155 :
1156 : /**
1157 : * drm_atomic_add_encoder_bridges - add bridges attached to an encoder
1158 : * @state: atomic state
1159 : * @encoder: DRM encoder
1160 : *
1161 : * This function adds all bridges attached to @encoder. This is needed to add
1162 : * bridge states to @state and make them available when
1163 : * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),
1164 : * &drm_bridge_funcs.atomic_enable(),
1165 : * &drm_bridge_funcs.atomic_disable_post_disable() are called.
1166 : *
1167 : * Returns:
1168 : * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1169 : * then the w/w mutex code has detected a deadlock and the entire atomic
1170 : * sequence must be restarted. All other errors are fatal.
1171 : */
1172 : int
1173 0 : drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
1174 : struct drm_encoder *encoder)
1175 : {
1176 : struct drm_bridge_state *bridge_state;
1177 : struct drm_bridge *bridge;
1178 :
1179 0 : if (!encoder)
1180 : return 0;
1181 :
1182 0 : drm_dbg_atomic(encoder->dev,
1183 : "Adding all bridges for [encoder:%d:%s] to %p\n",
1184 : encoder->base.id, encoder->name, state);
1185 :
1186 0 : drm_for_each_bridge_in_chain(encoder, bridge) {
1187 : /* Skip bridges that don't implement the atomic state hooks. */
1188 0 : if (!bridge->funcs->atomic_duplicate_state)
1189 0 : continue;
1190 :
1191 0 : bridge_state = drm_atomic_get_bridge_state(state, bridge);
1192 0 : if (IS_ERR(bridge_state))
1193 0 : return PTR_ERR(bridge_state);
1194 : }
1195 :
1196 : return 0;
1197 : }
1198 : EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
1199 :
1200 : /**
1201 : * drm_atomic_add_affected_connectors - add connectors for CRTC
1202 : * @state: atomic state
1203 : * @crtc: DRM CRTC
1204 : *
1205 : * This function walks the current configuration and adds all connectors
1206 : * currently using @crtc to the atomic configuration @state. Note that this
1207 : * function must acquire the connection mutex. This can potentially cause
1208 : * unneeded serialization if the update is just for the planes on one CRTC. Hence
1209 : * drivers and helpers should only call this when really needed (e.g. when a
1210 : * full modeset needs to happen due to some change).
1211 : *
1212 : * Returns:
1213 : * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1214 : * then the w/w mutex code has detected a deadlock and the entire atomic
1215 : * sequence must be restarted. All other errors are fatal.
1216 : */
1217 : int
1218 0 : drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1219 : struct drm_crtc *crtc)
1220 : {
1221 0 : struct drm_mode_config *config = &state->dev->mode_config;
1222 : struct drm_connector *connector;
1223 : struct drm_connector_state *conn_state;
1224 : struct drm_connector_list_iter conn_iter;
1225 : struct drm_crtc_state *crtc_state;
1226 : int ret;
1227 :
1228 0 : crtc_state = drm_atomic_get_crtc_state(state, crtc);
1229 0 : if (IS_ERR(crtc_state))
1230 0 : return PTR_ERR(crtc_state);
1231 :
1232 0 : ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1233 0 : if (ret)
1234 : return ret;
1235 :
1236 0 : drm_dbg_atomic(crtc->dev,
1237 : "Adding all current connectors for [CRTC:%d:%s] to %p\n",
1238 : crtc->base.id, crtc->name, state);
1239 :
1240 : /*
1241 : * Changed connectors are already in @state, so only need to look
1242 : * at the connector_mask in crtc_state.
1243 : */
1244 0 : drm_connector_list_iter_begin(state->dev, &conn_iter);
1245 0 : drm_for_each_connector_iter(connector, &conn_iter) {
1246 0 : if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1247 0 : continue;
1248 :
1249 0 : conn_state = drm_atomic_get_connector_state(state, connector);
1250 0 : if (IS_ERR(conn_state)) {
1251 0 : drm_connector_list_iter_end(&conn_iter);
1252 0 : return PTR_ERR(conn_state);
1253 : }
1254 : }
1255 0 : drm_connector_list_iter_end(&conn_iter);
1256 :
1257 0 : return 0;
1258 : }
1259 : EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1260 :
1261 : /**
1262 : * drm_atomic_add_affected_planes - add planes for CRTC
1263 : * @state: atomic state
1264 : * @crtc: DRM CRTC
1265 : *
1266 : * This function walks the current configuration and adds all planes
1267 : * currently used by @crtc to the atomic configuration @state. This is useful
1268 : * when an atomic commit also needs to check all currently enabled plane on
1269 : * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1270 : * to avoid special code to force-enable all planes.
1271 : *
1272 : * Since acquiring a plane state will always also acquire the w/w mutex of the
1273 : * current CRTC for that plane (if there is any) adding all the plane states for
1274 : * a CRTC will not reduce parallelism of atomic updates.
1275 : *
1276 : * Returns:
1277 : * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1278 : * then the w/w mutex code has detected a deadlock and the entire atomic
1279 : * sequence must be restarted. All other errors are fatal.
1280 : */
1281 : int
1282 0 : drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1283 : struct drm_crtc *crtc)
1284 : {
1285 0 : const struct drm_crtc_state *old_crtc_state =
1286 : drm_atomic_get_old_crtc_state(state, crtc);
1287 : struct drm_plane *plane;
1288 :
1289 0 : WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1290 :
1291 0 : drm_dbg_atomic(crtc->dev,
1292 : "Adding all current planes for [CRTC:%d:%s] to %p\n",
1293 : crtc->base.id, crtc->name, state);
1294 :
1295 0 : drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1296 0 : struct drm_plane_state *plane_state =
1297 : drm_atomic_get_plane_state(state, plane);
1298 :
1299 0 : if (IS_ERR(plane_state))
1300 0 : return PTR_ERR(plane_state);
1301 : }
1302 : return 0;
1303 : }
1304 : EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1305 :
1306 : /**
1307 : * drm_atomic_check_only - check whether a given config would work
1308 : * @state: atomic configuration to check
1309 : *
1310 : * Note that this function can return -EDEADLK if the driver needed to acquire
1311 : * more locks but encountered a deadlock. The caller must then do the usual w/w
1312 : * backoff dance and restart. All other errors are fatal.
1313 : *
1314 : * Returns:
1315 : * 0 on success, negative error code on failure.
1316 : */
1317 0 : int drm_atomic_check_only(struct drm_atomic_state *state)
1318 : {
1319 0 : struct drm_device *dev = state->dev;
1320 0 : struct drm_mode_config *config = &dev->mode_config;
1321 : struct drm_plane *plane;
1322 : struct drm_plane_state *old_plane_state;
1323 : struct drm_plane_state *new_plane_state;
1324 : struct drm_crtc *crtc;
1325 : struct drm_crtc_state *old_crtc_state;
1326 : struct drm_crtc_state *new_crtc_state;
1327 : struct drm_connector *conn;
1328 : struct drm_connector_state *conn_state;
1329 0 : unsigned int requested_crtc = 0;
1330 0 : unsigned int affected_crtc = 0;
1331 0 : int i, ret = 0;
1332 :
1333 0 : drm_dbg_atomic(dev, "checking %p\n", state);
1334 :
1335 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1336 0 : if (new_crtc_state->enable)
1337 0 : requested_crtc |= drm_crtc_mask(crtc);
1338 : }
1339 :
1340 0 : for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1341 0 : ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1342 0 : if (ret) {
1343 0 : drm_dbg_atomic(dev, "[PLANE:%d:%s] atomic core check failed\n",
1344 : plane->base.id, plane->name);
1345 0 : return ret;
1346 : }
1347 : }
1348 :
1349 0 : for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1350 0 : ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1351 0 : if (ret) {
1352 0 : drm_dbg_atomic(dev, "[CRTC:%d:%s] atomic core check failed\n",
1353 : crtc->base.id, crtc->name);
1354 0 : return ret;
1355 : }
1356 : }
1357 :
1358 0 : for_each_new_connector_in_state(state, conn, conn_state, i) {
1359 0 : ret = drm_atomic_connector_check(conn, conn_state);
1360 0 : if (ret) {
1361 0 : drm_dbg_atomic(dev, "[CONNECTOR:%d:%s] atomic core check failed\n",
1362 : conn->base.id, conn->name);
1363 0 : return ret;
1364 : }
1365 : }
1366 :
1367 0 : if (config->funcs->atomic_check) {
1368 0 : ret = config->funcs->atomic_check(state->dev, state);
1369 :
1370 0 : if (ret) {
1371 0 : drm_dbg_atomic(dev, "atomic driver check for %p failed: %d\n",
1372 : state, ret);
1373 0 : return ret;
1374 : }
1375 : }
1376 :
1377 0 : if (!state->allow_modeset) {
1378 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1379 0 : if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1380 0 : drm_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n",
1381 : crtc->base.id, crtc->name);
1382 0 : return -EINVAL;
1383 : }
1384 : }
1385 : }
1386 :
1387 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1388 0 : if (new_crtc_state->enable)
1389 0 : affected_crtc |= drm_crtc_mask(crtc);
1390 : }
1391 :
1392 : /*
1393 : * For commits that allow modesets drivers can add other CRTCs to the
1394 : * atomic commit, e.g. when they need to reallocate global resources.
1395 : * This can cause spurious EBUSY, which robs compositors of a very
1396 : * effective sanity check for their drawing loop. Therefor only allow
1397 : * drivers to add unrelated CRTC states for modeset commits.
1398 : *
1399 : * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output
1400 : * so compositors know what's going on.
1401 : */
1402 0 : if (affected_crtc != requested_crtc) {
1403 0 : drm_dbg_atomic(dev,
1404 : "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n",
1405 : requested_crtc, affected_crtc);
1406 0 : WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n",
1407 : requested_crtc, affected_crtc);
1408 : }
1409 :
1410 : return 0;
1411 : }
1412 : EXPORT_SYMBOL(drm_atomic_check_only);
1413 :
1414 : /**
1415 : * drm_atomic_commit - commit configuration atomically
1416 : * @state: atomic configuration to check
1417 : *
1418 : * Note that this function can return -EDEADLK if the driver needed to acquire
1419 : * more locks but encountered a deadlock. The caller must then do the usual w/w
1420 : * backoff dance and restart. All other errors are fatal.
1421 : *
1422 : * This function will take its own reference on @state.
1423 : * Callers should always release their reference with drm_atomic_state_put().
1424 : *
1425 : * Returns:
1426 : * 0 on success, negative error code on failure.
1427 : */
1428 0 : int drm_atomic_commit(struct drm_atomic_state *state)
1429 : {
1430 0 : struct drm_mode_config *config = &state->dev->mode_config;
1431 0 : struct drm_printer p = drm_info_printer(state->dev->dev);
1432 : int ret;
1433 :
1434 0 : if (drm_debug_enabled(DRM_UT_STATE))
1435 0 : drm_atomic_print_new_state(state, &p);
1436 :
1437 0 : ret = drm_atomic_check_only(state);
1438 0 : if (ret)
1439 : return ret;
1440 :
1441 0 : drm_dbg_atomic(state->dev, "committing %p\n", state);
1442 :
1443 0 : return config->funcs->atomic_commit(state->dev, state, false);
1444 : }
1445 : EXPORT_SYMBOL(drm_atomic_commit);
1446 :
1447 : /**
1448 : * drm_atomic_nonblocking_commit - atomic nonblocking commit
1449 : * @state: atomic configuration to check
1450 : *
1451 : * Note that this function can return -EDEADLK if the driver needed to acquire
1452 : * more locks but encountered a deadlock. The caller must then do the usual w/w
1453 : * backoff dance and restart. All other errors are fatal.
1454 : *
1455 : * This function will take its own reference on @state.
1456 : * Callers should always release their reference with drm_atomic_state_put().
1457 : *
1458 : * Returns:
1459 : * 0 on success, negative error code on failure.
1460 : */
1461 0 : int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1462 : {
1463 0 : struct drm_mode_config *config = &state->dev->mode_config;
1464 : int ret;
1465 :
1466 0 : ret = drm_atomic_check_only(state);
1467 0 : if (ret)
1468 : return ret;
1469 :
1470 0 : drm_dbg_atomic(state->dev, "committing %p nonblocking\n", state);
1471 :
1472 0 : return config->funcs->atomic_commit(state->dev, state, true);
1473 : }
1474 : EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1475 :
1476 : /* just used from drm-client and atomic-helper: */
1477 0 : int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1478 : struct drm_plane_state *plane_state)
1479 : {
1480 : int ret;
1481 :
1482 0 : ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1483 0 : if (ret != 0)
1484 : return ret;
1485 :
1486 0 : drm_atomic_set_fb_for_plane(plane_state, NULL);
1487 0 : plane_state->crtc_x = 0;
1488 0 : plane_state->crtc_y = 0;
1489 0 : plane_state->crtc_w = 0;
1490 0 : plane_state->crtc_h = 0;
1491 0 : plane_state->src_x = 0;
1492 0 : plane_state->src_y = 0;
1493 0 : plane_state->src_w = 0;
1494 0 : plane_state->src_h = 0;
1495 :
1496 0 : return 0;
1497 : }
1498 : EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1499 :
1500 0 : static int update_output_state(struct drm_atomic_state *state,
1501 : struct drm_mode_set *set)
1502 : {
1503 0 : struct drm_device *dev = set->crtc->dev;
1504 : struct drm_crtc *crtc;
1505 : struct drm_crtc_state *new_crtc_state;
1506 : struct drm_connector *connector;
1507 : struct drm_connector_state *new_conn_state;
1508 : int ret, i;
1509 :
1510 0 : ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1511 : state->acquire_ctx);
1512 0 : if (ret)
1513 : return ret;
1514 :
1515 : /* First disable all connectors on the target crtc. */
1516 0 : ret = drm_atomic_add_affected_connectors(state, set->crtc);
1517 0 : if (ret)
1518 : return ret;
1519 :
1520 0 : for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1521 0 : if (new_conn_state->crtc == set->crtc) {
1522 0 : ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1523 : NULL);
1524 0 : if (ret)
1525 : return ret;
1526 :
1527 : /* Make sure legacy setCrtc always re-trains */
1528 0 : new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1529 : }
1530 : }
1531 :
1532 : /* Then set all connectors from set->connectors on the target crtc */
1533 0 : for (i = 0; i < set->num_connectors; i++) {
1534 0 : new_conn_state = drm_atomic_get_connector_state(state,
1535 0 : set->connectors[i]);
1536 0 : if (IS_ERR(new_conn_state))
1537 0 : return PTR_ERR(new_conn_state);
1538 :
1539 0 : ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1540 : set->crtc);
1541 0 : if (ret)
1542 : return ret;
1543 : }
1544 :
1545 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1546 : /*
1547 : * Don't update ->enable for the CRTC in the set_config request,
1548 : * since a mismatch would indicate a bug in the upper layers.
1549 : * The actual modeset code later on will catch any
1550 : * inconsistencies here.
1551 : */
1552 0 : if (crtc == set->crtc)
1553 0 : continue;
1554 :
1555 0 : if (!new_crtc_state->connector_mask) {
1556 0 : ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1557 : NULL);
1558 0 : if (ret < 0)
1559 : return ret;
1560 :
1561 0 : new_crtc_state->active = false;
1562 : }
1563 : }
1564 :
1565 : return 0;
1566 : }
1567 :
1568 : /* just used from drm-client and atomic-helper: */
1569 0 : int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1570 : struct drm_atomic_state *state)
1571 : {
1572 : struct drm_crtc_state *crtc_state;
1573 : struct drm_plane_state *primary_state;
1574 0 : struct drm_crtc *crtc = set->crtc;
1575 : int hdisplay, vdisplay;
1576 : int ret;
1577 :
1578 0 : crtc_state = drm_atomic_get_crtc_state(state, crtc);
1579 0 : if (IS_ERR(crtc_state))
1580 0 : return PTR_ERR(crtc_state);
1581 :
1582 0 : primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1583 0 : if (IS_ERR(primary_state))
1584 0 : return PTR_ERR(primary_state);
1585 :
1586 0 : if (!set->mode) {
1587 0 : WARN_ON(set->fb);
1588 0 : WARN_ON(set->num_connectors);
1589 :
1590 0 : ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1591 0 : if (ret != 0)
1592 : return ret;
1593 :
1594 0 : crtc_state->active = false;
1595 :
1596 0 : ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1597 0 : if (ret != 0)
1598 : return ret;
1599 :
1600 0 : drm_atomic_set_fb_for_plane(primary_state, NULL);
1601 :
1602 0 : goto commit;
1603 : }
1604 :
1605 0 : WARN_ON(!set->fb);
1606 0 : WARN_ON(!set->num_connectors);
1607 :
1608 0 : ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1609 0 : if (ret != 0)
1610 : return ret;
1611 :
1612 0 : crtc_state->active = true;
1613 :
1614 0 : ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1615 0 : if (ret != 0)
1616 : return ret;
1617 :
1618 0 : drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1619 :
1620 0 : drm_atomic_set_fb_for_plane(primary_state, set->fb);
1621 0 : primary_state->crtc_x = 0;
1622 0 : primary_state->crtc_y = 0;
1623 0 : primary_state->crtc_w = hdisplay;
1624 0 : primary_state->crtc_h = vdisplay;
1625 0 : primary_state->src_x = set->x << 16;
1626 0 : primary_state->src_y = set->y << 16;
1627 0 : if (drm_rotation_90_or_270(primary_state->rotation)) {
1628 0 : primary_state->src_w = vdisplay << 16;
1629 0 : primary_state->src_h = hdisplay << 16;
1630 : } else {
1631 0 : primary_state->src_w = hdisplay << 16;
1632 0 : primary_state->src_h = vdisplay << 16;
1633 : }
1634 :
1635 : commit:
1636 0 : ret = update_output_state(state, set);
1637 0 : if (ret)
1638 : return ret;
1639 :
1640 0 : return 0;
1641 : }
1642 : EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1643 :
1644 : static void drm_atomic_private_obj_print_state(struct drm_printer *p,
1645 : const struct drm_private_state *state)
1646 : {
1647 0 : struct drm_private_obj *obj = state->obj;
1648 :
1649 0 : if (obj->funcs->atomic_print_state)
1650 0 : obj->funcs->atomic_print_state(p, state);
1651 : }
1652 :
1653 : /**
1654 : * drm_atomic_print_new_state - prints drm atomic state
1655 : * @state: atomic configuration to check
1656 : * @p: drm printer
1657 : *
1658 : * This functions prints the drm atomic state snapshot using the drm printer
1659 : * which is passed to it. This snapshot can be used for debugging purposes.
1660 : *
1661 : * Note that this function looks into the new state objects and hence its not
1662 : * safe to be used after the call to drm_atomic_helper_commit_hw_done().
1663 : */
1664 0 : void drm_atomic_print_new_state(const struct drm_atomic_state *state,
1665 : struct drm_printer *p)
1666 : {
1667 : struct drm_plane *plane;
1668 : struct drm_plane_state *plane_state;
1669 : struct drm_crtc *crtc;
1670 : struct drm_crtc_state *crtc_state;
1671 : struct drm_connector *connector;
1672 : struct drm_connector_state *connector_state;
1673 : struct drm_private_obj *obj;
1674 : struct drm_private_state *obj_state;
1675 : int i;
1676 :
1677 0 : if (!p) {
1678 0 : drm_err(state->dev, "invalid drm printer\n");
1679 0 : return;
1680 : }
1681 :
1682 0 : drm_dbg_atomic(state->dev, "checking %p\n", state);
1683 :
1684 0 : for_each_new_plane_in_state(state, plane, plane_state, i)
1685 0 : drm_atomic_plane_print_state(p, plane_state);
1686 :
1687 0 : for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1688 0 : drm_atomic_crtc_print_state(p, crtc_state);
1689 :
1690 0 : for_each_new_connector_in_state(state, connector, connector_state, i)
1691 0 : drm_atomic_connector_print_state(p, connector_state);
1692 :
1693 0 : for_each_new_private_obj_in_state(state, obj, obj_state, i)
1694 0 : drm_atomic_private_obj_print_state(p, obj_state);
1695 : }
1696 : EXPORT_SYMBOL(drm_atomic_print_new_state);
1697 :
1698 0 : static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1699 : bool take_locks)
1700 : {
1701 0 : struct drm_mode_config *config = &dev->mode_config;
1702 : struct drm_plane *plane;
1703 : struct drm_crtc *crtc;
1704 : struct drm_connector *connector;
1705 : struct drm_connector_list_iter conn_iter;
1706 :
1707 0 : if (!drm_drv_uses_atomic_modeset(dev))
1708 0 : return;
1709 :
1710 0 : list_for_each_entry(plane, &config->plane_list, head) {
1711 0 : if (take_locks)
1712 0 : drm_modeset_lock(&plane->mutex, NULL);
1713 0 : drm_atomic_plane_print_state(p, plane->state);
1714 0 : if (take_locks)
1715 0 : drm_modeset_unlock(&plane->mutex);
1716 : }
1717 :
1718 0 : list_for_each_entry(crtc, &config->crtc_list, head) {
1719 0 : if (take_locks)
1720 0 : drm_modeset_lock(&crtc->mutex, NULL);
1721 0 : drm_atomic_crtc_print_state(p, crtc->state);
1722 0 : if (take_locks)
1723 0 : drm_modeset_unlock(&crtc->mutex);
1724 : }
1725 :
1726 0 : drm_connector_list_iter_begin(dev, &conn_iter);
1727 0 : if (take_locks)
1728 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1729 0 : drm_for_each_connector_iter(connector, &conn_iter)
1730 0 : drm_atomic_connector_print_state(p, connector->state);
1731 0 : if (take_locks)
1732 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
1733 0 : drm_connector_list_iter_end(&conn_iter);
1734 : }
1735 :
1736 : /**
1737 : * drm_state_dump - dump entire device atomic state
1738 : * @dev: the drm device
1739 : * @p: where to print the state to
1740 : *
1741 : * Just for debugging. Drivers might want an option to dump state
1742 : * to dmesg in case of error irq's. (Hint, you probably want to
1743 : * ratelimit this!)
1744 : *
1745 : * The caller must wrap this drm_modeset_lock_all_ctx() and
1746 : * drm_modeset_drop_locks(). If this is called from error irq handler, it should
1747 : * not be enabled by default - if you are debugging errors you might
1748 : * not care that this is racey, but calling this without all modeset locks held
1749 : * is inherently unsafe.
1750 : */
1751 0 : void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1752 : {
1753 0 : __drm_state_dump(dev, p, false);
1754 0 : }
1755 : EXPORT_SYMBOL(drm_state_dump);
1756 :
1757 : #ifdef CONFIG_DEBUG_FS
1758 : static int drm_state_info(struct seq_file *m, void *data)
1759 : {
1760 : struct drm_debugfs_entry *entry = m->private;
1761 : struct drm_device *dev = entry->dev;
1762 : struct drm_printer p = drm_seq_file_printer(m);
1763 :
1764 : __drm_state_dump(dev, &p, true);
1765 :
1766 : return 0;
1767 : }
1768 :
1769 : /* any use in debugfs files to dump individual planes/crtc/etc? */
1770 : static const struct drm_debugfs_info drm_atomic_debugfs_list[] = {
1771 : {"state", drm_state_info, 0},
1772 : };
1773 :
1774 : void drm_atomic_debugfs_init(struct drm_minor *minor)
1775 : {
1776 : drm_debugfs_add_files(minor->dev, drm_atomic_debugfs_list,
1777 : ARRAY_SIZE(drm_atomic_debugfs_list));
1778 : }
1779 : #endif
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