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