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#include <linux/export.h>
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
49void __drm_crtc_commit_free(struct kref *kref)
50{
51 struct drm_crtc_commit *commit =
52 container_of(kref, struct drm_crtc_commit, ref);
53
54 kfree(objp: commit);
55}
56EXPORT_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 * 0 on success, a negative error code otherwise.
67 */
68int drm_crtc_commit_wait(struct drm_crtc_commit *commit)
69{
70 unsigned long timeout = 10 * HZ;
71 int ret;
72
73 if (!commit)
74 return 0;
75
76 ret = wait_for_completion_timeout(x: &commit->hw_done, timeout);
77 if (!ret) {
78 drm_err(commit->crtc->dev, "hw_done timed out\n");
79 return -ETIMEDOUT;
80 }
81
82 /*
83 * Currently no support for overwriting flips, hence
84 * stall for previous one to execute completely.
85 */
86 ret = wait_for_completion_timeout(x: &commit->flip_done, timeout);
87 if (!ret) {
88 drm_err(commit->crtc->dev, "flip_done timed out\n");
89 return -ETIMEDOUT;
90 }
91
92 return 0;
93}
94EXPORT_SYMBOL(drm_crtc_commit_wait);
95
96/**
97 * drm_atomic_state_default_release -
98 * release memory initialized by drm_atomic_state_init
99 * @state: atomic state
100 *
101 * Free all the memory allocated by drm_atomic_state_init.
102 * This should only be used by drivers which are still subclassing
103 * &drm_atomic_state and haven't switched to &drm_private_state yet.
104 */
105void drm_atomic_state_default_release(struct drm_atomic_state *state)
106{
107 kfree(objp: state->connectors);
108 kfree(objp: state->crtcs);
109 kfree(objp: state->planes);
110 kfree(objp: state->private_objs);
111}
112EXPORT_SYMBOL(drm_atomic_state_default_release);
113
114/**
115 * drm_atomic_state_init - init new atomic state
116 * @dev: DRM device
117 * @state: atomic state
118 *
119 * Default implementation for filling in a new atomic state.
120 * This should only be used by drivers which are still subclassing
121 * &drm_atomic_state and haven't switched to &drm_private_state yet.
122 */
123int
124drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
125{
126 kref_init(kref: &state->ref);
127
128 /* TODO legacy paths should maybe do a better job about
129 * setting this appropriately?
130 */
131 state->allow_modeset = true;
132
133 state->crtcs = kcalloc(dev->mode_config.num_crtc,
134 sizeof(*state->crtcs), GFP_KERNEL);
135 if (!state->crtcs)
136 goto fail;
137 state->planes = kcalloc(dev->mode_config.num_total_plane,
138 sizeof(*state->planes), GFP_KERNEL);
139 if (!state->planes)
140 goto fail;
141
142 /*
143 * Because drm_atomic_state can be committed asynchronously we need our
144 * own reference and cannot rely on the on implied by drm_file in the
145 * ioctl call.
146 */
147 drm_dev_get(dev);
148 state->dev = dev;
149
150 drm_dbg_atomic(dev, "Allocated atomic state %p\n", state);
151
152 return 0;
153fail:
154 drm_atomic_state_default_release(state);
155 return -ENOMEM;
156}
157EXPORT_SYMBOL(drm_atomic_state_init);
158
159/**
160 * drm_atomic_state_alloc - allocate atomic state
161 * @dev: DRM device
162 *
163 * This allocates an empty atomic state to track updates.
164 */
165struct drm_atomic_state *
166drm_atomic_state_alloc(struct drm_device *dev)
167{
168 struct drm_mode_config *config = &dev->mode_config;
169
170 if (!config->funcs->atomic_state_alloc) {
171 struct drm_atomic_state *state;
172
173 state = kzalloc(sizeof(*state), GFP_KERNEL);
174 if (!state)
175 return NULL;
176 if (drm_atomic_state_init(dev, state) < 0) {
177 kfree(objp: state);
178 return NULL;
179 }
180 return state;
181 }
182
183 return config->funcs->atomic_state_alloc(dev);
184}
185EXPORT_SYMBOL(drm_atomic_state_alloc);
186
187/**
188 * drm_atomic_state_default_clear - clear base atomic state
189 * @state: atomic state
190 *
191 * Default implementation for clearing atomic state.
192 * This should only be used by drivers which are still subclassing
193 * &drm_atomic_state and haven't switched to &drm_private_state yet.
194 */
195void drm_atomic_state_default_clear(struct drm_atomic_state *state)
196{
197 struct drm_device *dev = state->dev;
198 struct drm_mode_config *config = &dev->mode_config;
199 int i;
200
201 drm_dbg_atomic(dev, "Clearing atomic state %p\n", state);
202
203 for (i = 0; i < state->num_connector; i++) {
204 struct drm_connector *connector = state->connectors[i].ptr;
205
206 if (!connector)
207 continue;
208
209 connector->funcs->atomic_destroy_state(connector,
210 state->connectors[i].state);
211 state->connectors[i].ptr = NULL;
212 state->connectors[i].state = NULL;
213 state->connectors[i].old_state = NULL;
214 state->connectors[i].new_state = NULL;
215 drm_connector_put(connector);
216 }
217
218 for (i = 0; i < config->num_crtc; i++) {
219 struct drm_crtc *crtc = state->crtcs[i].ptr;
220
221 if (!crtc)
222 continue;
223
224 crtc->funcs->atomic_destroy_state(crtc,
225 state->crtcs[i].state);
226
227 state->crtcs[i].ptr = NULL;
228 state->crtcs[i].state = NULL;
229 state->crtcs[i].old_state = NULL;
230 state->crtcs[i].new_state = NULL;
231
232 if (state->crtcs[i].commit) {
233 drm_crtc_commit_put(commit: state->crtcs[i].commit);
234 state->crtcs[i].commit = NULL;
235 }
236 }
237
238 for (i = 0; i < config->num_total_plane; i++) {
239 struct drm_plane *plane = state->planes[i].ptr;
240
241 if (!plane)
242 continue;
243
244 plane->funcs->atomic_destroy_state(plane,
245 state->planes[i].state);
246 state->planes[i].ptr = NULL;
247 state->planes[i].state = NULL;
248 state->planes[i].old_state = NULL;
249 state->planes[i].new_state = NULL;
250 }
251
252 for (i = 0; i < state->num_private_objs; i++) {
253 struct drm_private_obj *obj = state->private_objs[i].ptr;
254
255 obj->funcs->atomic_destroy_state(obj,
256 state->private_objs[i].state);
257 state->private_objs[i].ptr = NULL;
258 state->private_objs[i].state = NULL;
259 state->private_objs[i].old_state = NULL;
260 state->private_objs[i].new_state = NULL;
261 }
262 state->num_private_objs = 0;
263
264 if (state->fake_commit) {
265 drm_crtc_commit_put(commit: state->fake_commit);
266 state->fake_commit = NULL;
267 }
268}
269EXPORT_SYMBOL(drm_atomic_state_default_clear);
270
271/**
272 * drm_atomic_state_clear - clear state object
273 * @state: atomic state
274 *
275 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
276 * all locks. So someone else could sneak in and change the current modeset
277 * configuration. Which means that all the state assembled in @state is no
278 * longer an atomic update to the current state, but to some arbitrary earlier
279 * state. Which could break assumptions the driver's
280 * &drm_mode_config_funcs.atomic_check likely relies on.
281 *
282 * Hence we must clear all cached state and completely start over, using this
283 * function.
284 */
285void drm_atomic_state_clear(struct drm_atomic_state *state)
286{
287 struct drm_device *dev = state->dev;
288 struct drm_mode_config *config = &dev->mode_config;
289
290 if (config->funcs->atomic_state_clear)
291 config->funcs->atomic_state_clear(state);
292 else
293 drm_atomic_state_default_clear(state);
294}
295EXPORT_SYMBOL(drm_atomic_state_clear);
296
297/**
298 * __drm_atomic_state_free - free all memory for an atomic state
299 * @ref: This atomic state to deallocate
300 *
301 * This frees all memory associated with an atomic state, including all the
302 * per-object state for planes, CRTCs and connectors.
303 */
304void __drm_atomic_state_free(struct kref *ref)
305{
306 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
307 struct drm_device *dev = state->dev;
308 struct drm_mode_config *config = &dev->mode_config;
309
310 drm_atomic_state_clear(state);
311
312 drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state);
313
314 if (config->funcs->atomic_state_free) {
315 config->funcs->atomic_state_free(state);
316 } else {
317 drm_atomic_state_default_release(state);
318 kfree(objp: state);
319 }
320
321 drm_dev_put(dev);
322}
323EXPORT_SYMBOL(__drm_atomic_state_free);
324
325/**
326 * drm_atomic_get_crtc_state - get CRTC state
327 * @state: global atomic state object
328 * @crtc: CRTC to get state object for
329 *
330 * This function returns the CRTC state for the given CRTC, allocating it if
331 * needed. It will also grab the relevant CRTC lock to make sure that the state
332 * is consistent.
333 *
334 * WARNING: Drivers may only add new CRTC states to a @state if
335 * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit
336 * not created by userspace through an IOCTL call.
337 *
338 * Returns:
339 * Either the allocated state or the error code encoded into the pointer. When
340 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
341 * entire atomic sequence must be restarted. All other errors are fatal.
342 */
343struct drm_crtc_state *
344drm_atomic_get_crtc_state(struct drm_atomic_state *state,
345 struct drm_crtc *crtc)
346{
347 int ret, index = drm_crtc_index(crtc);
348 struct drm_crtc_state *crtc_state;
349
350 WARN_ON(!state->acquire_ctx);
351
352 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
353 if (crtc_state)
354 return crtc_state;
355
356 ret = drm_modeset_lock(lock: &crtc->mutex, ctx: state->acquire_ctx);
357 if (ret)
358 return ERR_PTR(error: ret);
359
360 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
361 if (!crtc_state)
362 return ERR_PTR(error: -ENOMEM);
363
364 state->crtcs[index].state = crtc_state;
365 state->crtcs[index].old_state = crtc->state;
366 state->crtcs[index].new_state = crtc_state;
367 state->crtcs[index].ptr = crtc;
368 crtc_state->state = state;
369
370 drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n",
371 crtc->base.id, crtc->name, crtc_state, state);
372
373 return crtc_state;
374}
375EXPORT_SYMBOL(drm_atomic_get_crtc_state);
376
377static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
378 const struct drm_crtc_state *new_crtc_state)
379{
380 struct drm_crtc *crtc = new_crtc_state->crtc;
381
382 /* NOTE: we explicitly don't enforce constraints such as primary
383 * layer covering entire screen, since that is something we want
384 * to allow (on hw that supports it). For hw that does not, it
385 * should be checked in driver's crtc->atomic_check() vfunc.
386 *
387 * TODO: Add generic modeset state checks once we support those.
388 */
389
390 if (new_crtc_state->active && !new_crtc_state->enable) {
391 drm_dbg_atomic(crtc->dev,
392 "[CRTC:%d:%s] active without enabled\n",
393 crtc->base.id, crtc->name);
394 return -EINVAL;
395 }
396
397 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
398 * as this is a kernel-internal detail that userspace should never
399 * be able to trigger.
400 */
401 if (drm_core_check_feature(dev: crtc->dev, feature: DRIVER_ATOMIC) &&
402 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
403 drm_dbg_atomic(crtc->dev,
404 "[CRTC:%d:%s] enabled without mode blob\n",
405 crtc->base.id, crtc->name);
406 return -EINVAL;
407 }
408
409 if (drm_core_check_feature(dev: crtc->dev, feature: DRIVER_ATOMIC) &&
410 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
411 drm_dbg_atomic(crtc->dev,
412 "[CRTC:%d:%s] disabled with mode blob\n",
413 crtc->base.id, crtc->name);
414 return -EINVAL;
415 }
416
417 /*
418 * Reject event generation for when a CRTC is off and stays off.
419 * It wouldn't be hard to implement this, but userspace has a track
420 * record of happily burning through 100% cpu (or worse, crash) when the
421 * display pipe is suspended. To avoid all that fun just reject updates
422 * that ask for events since likely that indicates a bug in the
423 * compositor's drawing loop. This is consistent with the vblank IOCTL
424 * and legacy page_flip IOCTL which also reject service on a disabled
425 * pipe.
426 */
427 if (new_crtc_state->event &&
428 !new_crtc_state->active && !old_crtc_state->active) {
429 drm_dbg_atomic(crtc->dev,
430 "[CRTC:%d:%s] requesting event but off\n",
431 crtc->base.id, crtc->name);
432 return -EINVAL;
433 }
434
435 return 0;
436}
437
438static void drm_atomic_crtc_print_state(struct drm_printer *p,
439 const struct drm_crtc_state *state)
440{
441 struct drm_crtc *crtc = state->crtc;
442
443 drm_printf(p, f: "crtc[%u]: %s\n", crtc->base.id, crtc->name);
444 drm_printf(p, f: "\tenable=%d\n", state->enable);
445 drm_printf(p, f: "\tactive=%d\n", state->active);
446 drm_printf(p, f: "\tself_refresh_active=%d\n", state->self_refresh_active);
447 drm_printf(p, f: "\tplanes_changed=%d\n", state->planes_changed);
448 drm_printf(p, f: "\tmode_changed=%d\n", state->mode_changed);
449 drm_printf(p, f: "\tactive_changed=%d\n", state->active_changed);
450 drm_printf(p, f: "\tconnectors_changed=%d\n", state->connectors_changed);
451 drm_printf(p, f: "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
452 drm_printf(p, f: "\tplane_mask=%x\n", state->plane_mask);
453 drm_printf(p, f: "\tconnector_mask=%x\n", state->connector_mask);
454 drm_printf(p, f: "\tencoder_mask=%x\n", state->encoder_mask);
455 drm_printf(p, f: "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
456
457 if (crtc->funcs->atomic_print_state)
458 crtc->funcs->atomic_print_state(p, state);
459}
460
461static int drm_atomic_connector_check(struct drm_connector *connector,
462 struct drm_connector_state *state)
463{
464 struct drm_crtc_state *crtc_state;
465 struct drm_writeback_job *writeback_job = state->writeback_job;
466 const struct drm_display_info *info = &connector->display_info;
467
468 state->max_bpc = info->bpc ? info->bpc : 8;
469 if (connector->max_bpc_property)
470 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
471
472 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
473 return 0;
474
475 if (writeback_job->fb && !state->crtc) {
476 drm_dbg_atomic(connector->dev,
477 "[CONNECTOR:%d:%s] framebuffer without CRTC\n",
478 connector->base.id, connector->name);
479 return -EINVAL;
480 }
481
482 if (state->crtc)
483 crtc_state = drm_atomic_get_existing_crtc_state(state: state->state,
484 crtc: state->crtc);
485
486 if (writeback_job->fb && !crtc_state->active) {
487 drm_dbg_atomic(connector->dev,
488 "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
489 connector->base.id, connector->name,
490 state->crtc->base.id);
491 return -EINVAL;
492 }
493
494 if (!writeback_job->fb) {
495 if (writeback_job->out_fence) {
496 drm_dbg_atomic(connector->dev,
497 "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
498 connector->base.id, connector->name);
499 return -EINVAL;
500 }
501
502 drm_writeback_cleanup_job(job: writeback_job);
503 state->writeback_job = NULL;
504 }
505
506 return 0;
507}
508
509/**
510 * drm_atomic_get_plane_state - get plane state
511 * @state: global atomic state object
512 * @plane: plane to get state object for
513 *
514 * This function returns the plane state for the given plane, allocating it if
515 * needed. It will also grab the relevant plane lock to make sure that the state
516 * is consistent.
517 *
518 * Returns:
519 * Either the allocated state or the error code encoded into the pointer. When
520 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
521 * entire atomic sequence must be restarted. All other errors are fatal.
522 */
523struct drm_plane_state *
524drm_atomic_get_plane_state(struct drm_atomic_state *state,
525 struct drm_plane *plane)
526{
527 int ret, index = drm_plane_index(plane);
528 struct drm_plane_state *plane_state;
529
530 WARN_ON(!state->acquire_ctx);
531
532 /* the legacy pointers should never be set */
533 WARN_ON(plane->fb);
534 WARN_ON(plane->old_fb);
535 WARN_ON(plane->crtc);
536
537 plane_state = drm_atomic_get_existing_plane_state(state, plane);
538 if (plane_state)
539 return plane_state;
540
541 ret = drm_modeset_lock(lock: &plane->mutex, ctx: state->acquire_ctx);
542 if (ret)
543 return ERR_PTR(error: ret);
544
545 plane_state = plane->funcs->atomic_duplicate_state(plane);
546 if (!plane_state)
547 return ERR_PTR(error: -ENOMEM);
548
549 state->planes[index].state = plane_state;
550 state->planes[index].ptr = plane;
551 state->planes[index].old_state = plane->state;
552 state->planes[index].new_state = plane_state;
553 plane_state->state = state;
554
555 drm_dbg_atomic(plane->dev, "Added [PLANE:%d:%s] %p state to %p\n",
556 plane->base.id, plane->name, plane_state, state);
557
558 if (plane_state->crtc) {
559 struct drm_crtc_state *crtc_state;
560
561 crtc_state = drm_atomic_get_crtc_state(state,
562 plane_state->crtc);
563 if (IS_ERR(ptr: crtc_state))
564 return ERR_CAST(ptr: crtc_state);
565 }
566
567 return plane_state;
568}
569EXPORT_SYMBOL(drm_atomic_get_plane_state);
570
571static bool
572plane_switching_crtc(const struct drm_plane_state *old_plane_state,
573 const struct drm_plane_state *new_plane_state)
574{
575 if (!old_plane_state->crtc || !new_plane_state->crtc)
576 return false;
577
578 if (old_plane_state->crtc == new_plane_state->crtc)
579 return false;
580
581 /* This could be refined, but currently there's no helper or driver code
582 * to implement direct switching of active planes nor userspace to take
583 * advantage of more direct plane switching without the intermediate
584 * full OFF state.
585 */
586 return true;
587}
588
589/**
590 * drm_atomic_plane_check - check plane state
591 * @old_plane_state: old plane state to check
592 * @new_plane_state: new plane state to check
593 *
594 * Provides core sanity checks for plane state.
595 *
596 * RETURNS:
597 * Zero on success, error code on failure
598 */
599static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
600 const struct drm_plane_state *new_plane_state)
601{
602 struct drm_plane *plane = new_plane_state->plane;
603 struct drm_crtc *crtc = new_plane_state->crtc;
604 const struct drm_framebuffer *fb = new_plane_state->fb;
605 unsigned int fb_width, fb_height;
606 struct drm_mode_rect *clips;
607 uint32_t num_clips;
608
609 /* either *both* CRTC and FB must be set, or neither */
610 if (crtc && !fb) {
611 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n",
612 plane->base.id, plane->name);
613 return -EINVAL;
614 } else if (fb && !crtc) {
615 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] FB set but no CRTC\n",
616 plane->base.id, plane->name);
617 return -EINVAL;
618 }
619
620 /* if disabled, we don't care about the rest of the state: */
621 if (!crtc)
622 return 0;
623
624 /* Check whether this plane is usable on this CRTC */
625 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
626 drm_dbg_atomic(plane->dev,
627 "Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
628 crtc->base.id, crtc->name,
629 plane->base.id, plane->name);
630 return -EINVAL;
631 }
632
633 /* Check whether this plane supports the fb pixel format. */
634 if (!drm_plane_has_format(plane, format: fb->format->format, modifier: fb->modifier)) {
635 drm_dbg_atomic(plane->dev,
636 "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
637 plane->base.id, plane->name,
638 &fb->format->format, fb->modifier);
639 return -EINVAL;
640 }
641
642 /* Give drivers some help against integer overflows */
643 if (new_plane_state->crtc_w > INT_MAX ||
644 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
645 new_plane_state->crtc_h > INT_MAX ||
646 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
647 drm_dbg_atomic(plane->dev,
648 "[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
649 plane->base.id, plane->name,
650 new_plane_state->crtc_w, new_plane_state->crtc_h,
651 new_plane_state->crtc_x, new_plane_state->crtc_y);
652 return -ERANGE;
653 }
654
655 fb_width = fb->width << 16;
656 fb_height = fb->height << 16;
657
658 /* Make sure source coordinates are inside the fb. */
659 if (new_plane_state->src_w > fb_width ||
660 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
661 new_plane_state->src_h > fb_height ||
662 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
663 drm_dbg_atomic(plane->dev,
664 "[PLANE:%d:%s] invalid source coordinates "
665 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
666 plane->base.id, plane->name,
667 new_plane_state->src_w >> 16,
668 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
669 new_plane_state->src_h >> 16,
670 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
671 new_plane_state->src_x >> 16,
672 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
673 new_plane_state->src_y >> 16,
674 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
675 fb->width, fb->height);
676 return -ENOSPC;
677 }
678
679 clips = __drm_plane_get_damage_clips(state: new_plane_state);
680 num_clips = drm_plane_get_damage_clips_count(state: new_plane_state);
681
682 /* Make sure damage clips are valid and inside the fb. */
683 while (num_clips > 0) {
684 if (clips->x1 >= clips->x2 ||
685 clips->y1 >= clips->y2 ||
686 clips->x1 < 0 ||
687 clips->y1 < 0 ||
688 clips->x2 > fb_width ||
689 clips->y2 > fb_height) {
690 drm_dbg_atomic(plane->dev,
691 "[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
692 plane->base.id, plane->name, clips->x1,
693 clips->y1, clips->x2, clips->y2);
694 return -EINVAL;
695 }
696 clips++;
697 num_clips--;
698 }
699
700 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
701 drm_dbg_atomic(plane->dev,
702 "[PLANE:%d:%s] switching CRTC directly\n",
703 plane->base.id, plane->name);
704 return -EINVAL;
705 }
706
707 return 0;
708}
709
710static void drm_atomic_plane_print_state(struct drm_printer *p,
711 const struct drm_plane_state *state)
712{
713 struct drm_plane *plane = state->plane;
714 struct drm_rect src = drm_plane_state_src(state);
715 struct drm_rect dest = drm_plane_state_dest(state);
716
717 drm_printf(p, f: "plane[%u]: %s\n", plane->base.id, plane->name);
718 drm_printf(p, f: "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
719 drm_printf(p, f: "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
720 if (state->fb)
721 drm_framebuffer_print_info(p, indent: 2, fb: state->fb);
722 drm_printf(p, f: "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
723 drm_printf(p, f: "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
724 drm_printf(p, f: "\trotation=%x\n", state->rotation);
725 drm_printf(p, f: "\tnormalized-zpos=%x\n", state->normalized_zpos);
726 drm_printf(p, f: "\tcolor-encoding=%s\n",
727 drm_get_color_encoding_name(encoding: state->color_encoding));
728 drm_printf(p, f: "\tcolor-range=%s\n",
729 drm_get_color_range_name(range: state->color_range));
730 drm_printf(p, f: "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
731
732 if (plane->funcs->atomic_print_state)
733 plane->funcs->atomic_print_state(p, state);
734}
735
736/**
737 * DOC: handling driver private state
738 *
739 * Very often the DRM objects exposed to userspace in the atomic modeset api
740 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
741 * underlying hardware. Especially for any kind of shared resources (e.g. shared
742 * clocks, scaler units, bandwidth and fifo limits shared among a group of
743 * planes or CRTCs, and so on) it makes sense to model these as independent
744 * objects. Drivers then need to do similar state tracking and commit ordering for
745 * such private (since not exposed to userspace) objects as the atomic core and
746 * helpers already provide for connectors, planes and CRTCs.
747 *
748 * To make this easier on drivers the atomic core provides some support to track
749 * driver private state objects using struct &drm_private_obj, with the
750 * associated state struct &drm_private_state.
751 *
752 * Similar to userspace-exposed objects, private state structures can be
753 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care
754 * of locking, hence drivers should not have a need to call drm_modeset_lock()
755 * directly. Sequence of the actual hardware state commit is not handled,
756 * drivers might need to keep track of struct drm_crtc_commit within subclassed
757 * structure of &drm_private_state as necessary, e.g. similar to
758 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
759 *
760 * All private state structures contained in a &drm_atomic_state update can be
761 * iterated using for_each_oldnew_private_obj_in_state(),
762 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
763 * Drivers are recommended to wrap these for each type of driver private state
764 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
765 * least if they want to iterate over all objects of a given type.
766 *
767 * An earlier way to handle driver private state was by subclassing struct
768 * &drm_atomic_state. But since that encourages non-standard ways to implement
769 * the check/commit split atomic requires (by using e.g. "check and rollback or
770 * commit instead" of "duplicate state, check, then either commit or release
771 * duplicated state) it is deprecated in favour of using &drm_private_state.
772 */
773
774/**
775 * drm_atomic_private_obj_init - initialize private object
776 * @dev: DRM device this object will be attached to
777 * @obj: private object
778 * @state: initial private object state
779 * @funcs: pointer to the struct of function pointers that identify the object
780 * type
781 *
782 * Initialize the private object, which can be embedded into any
783 * driver private object that needs its own atomic state.
784 */
785void
786drm_atomic_private_obj_init(struct drm_device *dev,
787 struct drm_private_obj *obj,
788 struct drm_private_state *state,
789 const struct drm_private_state_funcs *funcs)
790{
791 memset(s: obj, c: 0, n: sizeof(*obj));
792
793 drm_modeset_lock_init(lock: &obj->lock);
794
795 obj->state = state;
796 obj->funcs = funcs;
797 list_add_tail(new: &obj->head, head: &dev->mode_config.privobj_list);
798
799 state->obj = obj;
800}
801EXPORT_SYMBOL(drm_atomic_private_obj_init);
802
803/**
804 * drm_atomic_private_obj_fini - finalize private object
805 * @obj: private object
806 *
807 * Finalize the private object.
808 */
809void
810drm_atomic_private_obj_fini(struct drm_private_obj *obj)
811{
812 list_del(entry: &obj->head);
813 obj->funcs->atomic_destroy_state(obj, obj->state);
814 drm_modeset_lock_fini(lock: &obj->lock);
815}
816EXPORT_SYMBOL(drm_atomic_private_obj_fini);
817
818/**
819 * drm_atomic_get_private_obj_state - get private object state
820 * @state: global atomic state
821 * @obj: private object to get the state for
822 *
823 * This function returns the private object state for the given private object,
824 * allocating the state if needed. It will also grab the relevant private
825 * object lock to make sure that the state is consistent.
826 *
827 * RETURNS:
828 * Either the allocated state or the error code encoded into a pointer.
829 */
830struct drm_private_state *
831drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
832 struct drm_private_obj *obj)
833{
834 int index, num_objs, i, ret;
835 size_t size;
836 struct __drm_private_objs_state *arr;
837 struct drm_private_state *obj_state;
838
839 for (i = 0; i < state->num_private_objs; i++)
840 if (obj == state->private_objs[i].ptr)
841 return state->private_objs[i].state;
842
843 ret = drm_modeset_lock(lock: &obj->lock, ctx: state->acquire_ctx);
844 if (ret)
845 return ERR_PTR(error: ret);
846
847 num_objs = state->num_private_objs + 1;
848 size = sizeof(*state->private_objs) * num_objs;
849 arr = krealloc(state->private_objs, size, GFP_KERNEL);
850 if (!arr)
851 return ERR_PTR(error: -ENOMEM);
852
853 state->private_objs = arr;
854 index = state->num_private_objs;
855 memset(s: &state->private_objs[index], c: 0, n: sizeof(*state->private_objs));
856
857 obj_state = obj->funcs->atomic_duplicate_state(obj);
858 if (!obj_state)
859 return ERR_PTR(error: -ENOMEM);
860
861 state->private_objs[index].state = obj_state;
862 state->private_objs[index].old_state = obj->state;
863 state->private_objs[index].new_state = obj_state;
864 state->private_objs[index].ptr = obj;
865 obj_state->state = state;
866
867 state->num_private_objs = num_objs;
868
869 drm_dbg_atomic(state->dev,
870 "Added new private object %p state %p to %p\n",
871 obj, obj_state, state);
872
873 return obj_state;
874}
875EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
876
877/**
878 * drm_atomic_get_old_private_obj_state
879 * @state: global atomic state object
880 * @obj: private_obj to grab
881 *
882 * This function returns the old private object state for the given private_obj,
883 * or NULL if the private_obj is not part of the global atomic state.
884 */
885struct drm_private_state *
886drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state,
887 struct drm_private_obj *obj)
888{
889 int i;
890
891 for (i = 0; i < state->num_private_objs; i++)
892 if (obj == state->private_objs[i].ptr)
893 return state->private_objs[i].old_state;
894
895 return NULL;
896}
897EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
898
899/**
900 * drm_atomic_get_new_private_obj_state
901 * @state: global atomic state object
902 * @obj: private_obj to grab
903 *
904 * This function returns the new private object state for the given private_obj,
905 * or NULL if the private_obj is not part of the global atomic state.
906 */
907struct drm_private_state *
908drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state,
909 struct drm_private_obj *obj)
910{
911 int i;
912
913 for (i = 0; i < state->num_private_objs; i++)
914 if (obj == state->private_objs[i].ptr)
915 return state->private_objs[i].new_state;
916
917 return NULL;
918}
919EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
920
921/**
922 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
923 * @state: Atomic state
924 * @encoder: The encoder to fetch the connector state for
925 *
926 * This function finds and returns the connector that was connected to @encoder
927 * as specified by the @state.
928 *
929 * If there is no connector in @state which previously had @encoder connected to
930 * it, this function will return NULL. While this may seem like an invalid use
931 * case, it is sometimes useful to differentiate commits which had no prior
932 * connectors attached to @encoder vs ones that did (and to inspect their
933 * state). This is especially true in enable hooks because the pipeline has
934 * changed.
935 *
936 * If you don't have access to the atomic state, see
937 * drm_atomic_get_connector_for_encoder().
938 *
939 * Returns: The old connector connected to @encoder, or NULL if the encoder is
940 * not connected.
941 */
942struct drm_connector *
943drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state,
944 struct drm_encoder *encoder)
945{
946 struct drm_connector_state *conn_state;
947 struct drm_connector *connector;
948 unsigned int i;
949
950 for_each_old_connector_in_state(state, connector, conn_state, i) {
951 if (conn_state->best_encoder == encoder)
952 return connector;
953 }
954
955 return NULL;
956}
957EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
958
959/**
960 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
961 * @state: Atomic state
962 * @encoder: The encoder to fetch the connector state for
963 *
964 * This function finds and returns the connector that will be connected to
965 * @encoder as specified by the @state.
966 *
967 * If there is no connector in @state which will have @encoder connected to it,
968 * this function will return NULL. While this may seem like an invalid use case,
969 * it is sometimes useful to differentiate commits which have no connectors
970 * attached to @encoder vs ones that do (and to inspect their state). This is
971 * especially true in disable hooks because the pipeline will change.
972 *
973 * If you don't have access to the atomic state, see
974 * drm_atomic_get_connector_for_encoder().
975 *
976 * Returns: The new connector connected to @encoder, or NULL if the encoder is
977 * not connected.
978 */
979struct drm_connector *
980drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,
981 struct drm_encoder *encoder)
982{
983 struct drm_connector_state *conn_state;
984 struct drm_connector *connector;
985 unsigned int i;
986
987 for_each_new_connector_in_state(state, connector, conn_state, i) {
988 if (conn_state->best_encoder == encoder)
989 return connector;
990 }
991
992 return NULL;
993}
994EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
995
996/**
997 * drm_atomic_get_connector_for_encoder - Get connector currently assigned to an encoder
998 * @encoder: The encoder to find the connector of
999 * @ctx: Modeset locking context
1000 *
1001 * This function finds and returns the connector currently assigned to
1002 * an @encoder.
1003 *
1004 * It is similar to the drm_atomic_get_old_connector_for_encoder() and
1005 * drm_atomic_get_new_connector_for_encoder() helpers, but doesn't
1006 * require access to the atomic state. If you have access to it, prefer
1007 * using these. This helper is typically useful in situations where you
1008 * don't have access to the atomic state, like detect, link repair,
1009 * threaded interrupt handlers, or hooks from other frameworks (ALSA,
1010 * CEC, etc.).
1011 *
1012 * Returns:
1013 * The connector connected to @encoder, or an error pointer otherwise.
1014 * When the error is EDEADLK, a deadlock has been detected and the
1015 * sequence must be restarted.
1016 */
1017struct drm_connector *
1018drm_atomic_get_connector_for_encoder(const struct drm_encoder *encoder,
1019 struct drm_modeset_acquire_ctx *ctx)
1020{
1021 struct drm_connector_list_iter conn_iter;
1022 struct drm_connector *out_connector = ERR_PTR(error: -EINVAL);
1023 struct drm_connector *connector;
1024 struct drm_device *dev = encoder->dev;
1025 int ret;
1026
1027 ret = drm_modeset_lock(lock: &dev->mode_config.connection_mutex, ctx);
1028 if (ret)
1029 return ERR_PTR(error: ret);
1030
1031 drm_connector_list_iter_begin(dev, iter: &conn_iter);
1032 drm_for_each_connector_iter(connector, &conn_iter) {
1033 if (!connector->state)
1034 continue;
1035
1036 if (encoder == connector->state->best_encoder) {
1037 out_connector = connector;
1038 break;
1039 }
1040 }
1041 drm_connector_list_iter_end(iter: &conn_iter);
1042 drm_modeset_unlock(lock: &dev->mode_config.connection_mutex);
1043
1044 return out_connector;
1045}
1046EXPORT_SYMBOL(drm_atomic_get_connector_for_encoder);
1047
1048
1049/**
1050 * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder
1051 * @state: Atomic state
1052 * @encoder: The encoder to fetch the crtc state for
1053 *
1054 * This function finds and returns the crtc that was connected to @encoder
1055 * as specified by the @state.
1056 *
1057 * Returns: The old crtc connected to @encoder, or NULL if the encoder is
1058 * not connected.
1059 */
1060struct drm_crtc *
1061drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_state *state,
1062 struct drm_encoder *encoder)
1063{
1064 struct drm_connector *connector;
1065 struct drm_connector_state *conn_state;
1066
1067 connector = drm_atomic_get_old_connector_for_encoder(state, encoder);
1068 if (!connector)
1069 return NULL;
1070
1071 conn_state = drm_atomic_get_old_connector_state(state, connector);
1072 if (!conn_state)
1073 return NULL;
1074
1075 return conn_state->crtc;
1076}
1077EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder);
1078
1079/**
1080 * drm_atomic_get_new_crtc_for_encoder - Get new crtc for an encoder
1081 * @state: Atomic state
1082 * @encoder: The encoder to fetch the crtc state for
1083 *
1084 * This function finds and returns the crtc that will be connected to @encoder
1085 * as specified by the @state.
1086 *
1087 * Returns: The new crtc connected to @encoder, or NULL if the encoder is
1088 * not connected.
1089 */
1090struct drm_crtc *
1091drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_state *state,
1092 struct drm_encoder *encoder)
1093{
1094 struct drm_connector *connector;
1095 struct drm_connector_state *conn_state;
1096
1097 connector = drm_atomic_get_new_connector_for_encoder(state, encoder);
1098 if (!connector)
1099 return NULL;
1100
1101 conn_state = drm_atomic_get_new_connector_state(state, connector);
1102 if (!conn_state)
1103 return NULL;
1104
1105 return conn_state->crtc;
1106}
1107EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder);
1108
1109/**
1110 * drm_atomic_get_connector_state - get connector state
1111 * @state: global atomic state object
1112 * @connector: connector to get state object for
1113 *
1114 * This function returns the connector state for the given connector,
1115 * allocating it if needed. It will also grab the relevant connector lock to
1116 * make sure that the state is consistent.
1117 *
1118 * Returns:
1119 * Either the allocated state or the error code encoded into the pointer. When
1120 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1121 * entire atomic sequence must be restarted. All other errors are fatal.
1122 */
1123struct drm_connector_state *
1124drm_atomic_get_connector_state(struct drm_atomic_state *state,
1125 struct drm_connector *connector)
1126{
1127 int ret, index;
1128 struct drm_mode_config *config = &connector->dev->mode_config;
1129 struct drm_connector_state *connector_state;
1130
1131 WARN_ON(!state->acquire_ctx);
1132
1133 ret = drm_modeset_lock(lock: &config->connection_mutex, ctx: state->acquire_ctx);
1134 if (ret)
1135 return ERR_PTR(error: ret);
1136
1137 index = drm_connector_index(connector);
1138
1139 if (index >= state->num_connector) {
1140 struct __drm_connnectors_state *c;
1141 int alloc = max(index + 1, config->num_connector);
1142
1143 c = krealloc_array(state->connectors, alloc,
1144 sizeof(*state->connectors), GFP_KERNEL);
1145 if (!c)
1146 return ERR_PTR(error: -ENOMEM);
1147
1148 state->connectors = c;
1149 memset(s: &state->connectors[state->num_connector], c: 0,
1150 n: sizeof(*state->connectors) * (alloc - state->num_connector));
1151
1152 state->num_connector = alloc;
1153 }
1154
1155 if (state->connectors[index].state)
1156 return state->connectors[index].state;
1157
1158 connector_state = connector->funcs->atomic_duplicate_state(connector);
1159 if (!connector_state)
1160 return ERR_PTR(error: -ENOMEM);
1161
1162 drm_connector_get(connector);
1163 state->connectors[index].state = connector_state;
1164 state->connectors[index].old_state = connector->state;
1165 state->connectors[index].new_state = connector_state;
1166 state->connectors[index].ptr = connector;
1167 connector_state->state = state;
1168
1169 drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n",
1170 connector->base.id, connector->name,
1171 connector_state, state);
1172
1173 if (connector_state->crtc) {
1174 struct drm_crtc_state *crtc_state;
1175
1176 crtc_state = drm_atomic_get_crtc_state(state,
1177 connector_state->crtc);
1178 if (IS_ERR(ptr: crtc_state))
1179 return ERR_CAST(ptr: crtc_state);
1180 }
1181
1182 return connector_state;
1183}
1184EXPORT_SYMBOL(drm_atomic_get_connector_state);
1185
1186static void drm_atomic_connector_print_state(struct drm_printer *p,
1187 const struct drm_connector_state *state)
1188{
1189 struct drm_connector *connector = state->connector;
1190
1191 drm_printf(p, f: "connector[%u]: %s\n", connector->base.id, connector->name);
1192 drm_printf(p, f: "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1193 drm_printf(p, f: "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1194 drm_printf(p, f: "\tinterlace_allowed=%d\n", connector->interlace_allowed);
1195 drm_printf(p, f: "\tycbcr_420_allowed=%d\n", connector->ycbcr_420_allowed);
1196 drm_printf(p, f: "\tmax_requested_bpc=%d\n", state->max_requested_bpc);
1197 drm_printf(p, f: "\tcolorspace=%s\n", drm_get_colorspace_name(colorspace: state->colorspace));
1198
1199 if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
1200 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
1201 drm_printf(p, f: "\tbroadcast_rgb=%s\n",
1202 drm_hdmi_connector_get_broadcast_rgb_name(broadcast_rgb: state->hdmi.broadcast_rgb));
1203 drm_printf(p, f: "\tis_limited_range=%c\n", state->hdmi.is_limited_range ? 'y' : 'n');
1204 drm_printf(p, f: "\toutput_bpc=%u\n", state->hdmi.output_bpc);
1205 drm_printf(p, f: "\toutput_format=%s\n",
1206 drm_hdmi_connector_get_output_format_name(fmt: state->hdmi.output_format));
1207 drm_printf(p, f: "\ttmds_char_rate=%llu\n", state->hdmi.tmds_char_rate);
1208 }
1209
1210 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1211 if (state->writeback_job && state->writeback_job->fb)
1212 drm_printf(p, f: "\tfb=%d\n", state->writeback_job->fb->base.id);
1213
1214 if (connector->funcs->atomic_print_state)
1215 connector->funcs->atomic_print_state(p, state);
1216}
1217
1218/**
1219 * drm_atomic_get_bridge_state - get bridge state
1220 * @state: global atomic state object
1221 * @bridge: bridge to get state object for
1222 *
1223 * This function returns the bridge state for the given bridge, allocating it
1224 * if needed. It will also grab the relevant bridge lock to make sure that the
1225 * state is consistent.
1226 *
1227 * Returns:
1228 * Either the allocated state or the error code encoded into the pointer. When
1229 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1230 * entire atomic sequence must be restarted.
1231 */
1232struct drm_bridge_state *
1233drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1234 struct drm_bridge *bridge)
1235{
1236 struct drm_private_state *obj_state;
1237
1238 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
1239 if (IS_ERR(ptr: obj_state))
1240 return ERR_CAST(ptr: obj_state);
1241
1242 return drm_priv_to_bridge_state(priv: obj_state);
1243}
1244EXPORT_SYMBOL(drm_atomic_get_bridge_state);
1245
1246/**
1247 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
1248 * @state: global atomic state object
1249 * @bridge: bridge to grab
1250 *
1251 * This function returns the old bridge state for the given bridge, or NULL if
1252 * the bridge is not part of the global atomic state.
1253 */
1254struct drm_bridge_state *
1255drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,
1256 struct drm_bridge *bridge)
1257{
1258 struct drm_private_state *obj_state;
1259
1260 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
1261 if (!obj_state)
1262 return NULL;
1263
1264 return drm_priv_to_bridge_state(priv: obj_state);
1265}
1266EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
1267
1268/**
1269 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
1270 * @state: global atomic state object
1271 * @bridge: bridge to grab
1272 *
1273 * This function returns the new bridge state for the given bridge, or NULL if
1274 * the bridge is not part of the global atomic state.
1275 */
1276struct drm_bridge_state *
1277drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state,
1278 struct drm_bridge *bridge)
1279{
1280 struct drm_private_state *obj_state;
1281
1282 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
1283 if (!obj_state)
1284 return NULL;
1285
1286 return drm_priv_to_bridge_state(priv: obj_state);
1287}
1288EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
1289
1290/**
1291 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder
1292 * @state: atomic state
1293 * @encoder: DRM encoder
1294 *
1295 * This function adds all bridges attached to @encoder. This is needed to add
1296 * bridge states to @state and make them available when
1297 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),
1298 * &drm_bridge_funcs.atomic_enable(),
1299 * &drm_bridge_funcs.atomic_disable_post_disable() are called.
1300 *
1301 * Returns:
1302 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1303 * then the w/w mutex code has detected a deadlock and the entire atomic
1304 * sequence must be restarted. All other errors are fatal.
1305 */
1306int
1307drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
1308 struct drm_encoder *encoder)
1309{
1310 struct drm_bridge_state *bridge_state;
1311 struct drm_bridge *bridge;
1312
1313 if (!encoder)
1314 return 0;
1315
1316 drm_dbg_atomic(encoder->dev,
1317 "Adding all bridges for [encoder:%d:%s] to %p\n",
1318 encoder->base.id, encoder->name, state);
1319
1320 drm_for_each_bridge_in_chain(encoder, bridge) {
1321 /* Skip bridges that don't implement the atomic state hooks. */
1322 if (!bridge->funcs->atomic_duplicate_state)
1323 continue;
1324
1325 bridge_state = drm_atomic_get_bridge_state(state, bridge);
1326 if (IS_ERR(ptr: bridge_state))
1327 return PTR_ERR(ptr: bridge_state);
1328 }
1329
1330 return 0;
1331}
1332EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
1333
1334/**
1335 * drm_atomic_add_affected_connectors - add connectors for CRTC
1336 * @state: atomic state
1337 * @crtc: DRM CRTC
1338 *
1339 * This function walks the current configuration and adds all connectors
1340 * currently using @crtc to the atomic configuration @state. Note that this
1341 * function must acquire the connection mutex. This can potentially cause
1342 * unneeded serialization if the update is just for the planes on one CRTC. Hence
1343 * drivers and helpers should only call this when really needed (e.g. when a
1344 * full modeset needs to happen due to some change).
1345 *
1346 * Returns:
1347 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1348 * then the w/w mutex code has detected a deadlock and the entire atomic
1349 * sequence must be restarted. All other errors are fatal.
1350 */
1351int
1352drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1353 struct drm_crtc *crtc)
1354{
1355 struct drm_mode_config *config = &state->dev->mode_config;
1356 struct drm_connector *connector;
1357 struct drm_connector_state *conn_state;
1358 struct drm_connector_list_iter conn_iter;
1359 struct drm_crtc_state *crtc_state;
1360 int ret;
1361
1362 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1363 if (IS_ERR(ptr: crtc_state))
1364 return PTR_ERR(ptr: crtc_state);
1365
1366 ret = drm_modeset_lock(lock: &config->connection_mutex, ctx: state->acquire_ctx);
1367 if (ret)
1368 return ret;
1369
1370 drm_dbg_atomic(crtc->dev,
1371 "Adding all current connectors for [CRTC:%d:%s] to %p\n",
1372 crtc->base.id, crtc->name, state);
1373
1374 /*
1375 * Changed connectors are already in @state, so only need to look
1376 * at the connector_mask in crtc_state.
1377 */
1378 drm_connector_list_iter_begin(dev: state->dev, iter: &conn_iter);
1379 drm_for_each_connector_iter(connector, &conn_iter) {
1380 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1381 continue;
1382
1383 conn_state = drm_atomic_get_connector_state(state, connector);
1384 if (IS_ERR(ptr: conn_state)) {
1385 drm_connector_list_iter_end(iter: &conn_iter);
1386 return PTR_ERR(ptr: conn_state);
1387 }
1388 }
1389 drm_connector_list_iter_end(iter: &conn_iter);
1390
1391 return 0;
1392}
1393EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1394
1395/**
1396 * drm_atomic_add_affected_planes - add planes for CRTC
1397 * @state: atomic state
1398 * @crtc: DRM CRTC
1399 *
1400 * This function walks the current configuration and adds all planes
1401 * currently used by @crtc to the atomic configuration @state. This is useful
1402 * when an atomic commit also needs to check all currently enabled plane on
1403 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1404 * to avoid special code to force-enable all planes.
1405 *
1406 * Since acquiring a plane state will always also acquire the w/w mutex of the
1407 * current CRTC for that plane (if there is any) adding all the plane states for
1408 * a CRTC will not reduce parallelism of atomic updates.
1409 *
1410 * Returns:
1411 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1412 * then the w/w mutex code has detected a deadlock and the entire atomic
1413 * sequence must be restarted. All other errors are fatal.
1414 */
1415int
1416drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1417 struct drm_crtc *crtc)
1418{
1419 const struct drm_crtc_state *old_crtc_state =
1420 drm_atomic_get_old_crtc_state(state, crtc);
1421 struct drm_plane *plane;
1422
1423 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1424
1425 drm_dbg_atomic(crtc->dev,
1426 "Adding all current planes for [CRTC:%d:%s] to %p\n",
1427 crtc->base.id, crtc->name, state);
1428
1429 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1430 struct drm_plane_state *plane_state =
1431 drm_atomic_get_plane_state(state, plane);
1432
1433 if (IS_ERR(ptr: plane_state))
1434 return PTR_ERR(ptr: plane_state);
1435 }
1436 return 0;
1437}
1438EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1439
1440/**
1441 * drm_atomic_check_only - check whether a given config would work
1442 * @state: atomic configuration to check
1443 *
1444 * Note that this function can return -EDEADLK if the driver needed to acquire
1445 * more locks but encountered a deadlock. The caller must then do the usual w/w
1446 * backoff dance and restart. All other errors are fatal.
1447 *
1448 * Returns:
1449 * 0 on success, negative error code on failure.
1450 */
1451int drm_atomic_check_only(struct drm_atomic_state *state)
1452{
1453 struct drm_device *dev = state->dev;
1454 struct drm_mode_config *config = &dev->mode_config;
1455 struct drm_plane *plane;
1456 struct drm_plane_state *old_plane_state;
1457 struct drm_plane_state *new_plane_state;
1458 struct drm_crtc *crtc;
1459 struct drm_crtc_state *old_crtc_state;
1460 struct drm_crtc_state *new_crtc_state;
1461 struct drm_connector *conn;
1462 struct drm_connector_state *conn_state;
1463 unsigned int requested_crtc = 0;
1464 unsigned int affected_crtc = 0;
1465 int i, ret = 0;
1466
1467 drm_dbg_atomic(dev, "checking %p\n", state);
1468
1469 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1470 if (new_crtc_state->enable)
1471 requested_crtc |= drm_crtc_mask(crtc);
1472 }
1473
1474 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1475 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1476 if (ret) {
1477 drm_dbg_atomic(dev, "[PLANE:%d:%s] atomic core check failed\n",
1478 plane->base.id, plane->name);
1479 return ret;
1480 }
1481 }
1482
1483 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1484 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1485 if (ret) {
1486 drm_dbg_atomic(dev, "[CRTC:%d:%s] atomic core check failed\n",
1487 crtc->base.id, crtc->name);
1488 return ret;
1489 }
1490 }
1491
1492 for_each_new_connector_in_state(state, conn, conn_state, i) {
1493 ret = drm_atomic_connector_check(connector: conn, state: conn_state);
1494 if (ret) {
1495 drm_dbg_atomic(dev, "[CONNECTOR:%d:%s] atomic core check failed\n",
1496 conn->base.id, conn->name);
1497 return ret;
1498 }
1499 }
1500
1501 if (config->funcs->atomic_check) {
1502 ret = config->funcs->atomic_check(state->dev, state);
1503
1504 if (ret) {
1505 drm_dbg_atomic(dev, "atomic driver check for %p failed: %d\n",
1506 state, ret);
1507 return ret;
1508 }
1509 }
1510
1511 if (!state->allow_modeset) {
1512 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1513 if (drm_atomic_crtc_needs_modeset(state: new_crtc_state)) {
1514 drm_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n",
1515 crtc->base.id, crtc->name);
1516 return -EINVAL;
1517 }
1518 }
1519 }
1520
1521 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1522 if (new_crtc_state->enable)
1523 affected_crtc |= drm_crtc_mask(crtc);
1524 }
1525
1526 /*
1527 * For commits that allow modesets drivers can add other CRTCs to the
1528 * atomic commit, e.g. when they need to reallocate global resources.
1529 * This can cause spurious EBUSY, which robs compositors of a very
1530 * effective sanity check for their drawing loop. Therefor only allow
1531 * drivers to add unrelated CRTC states for modeset commits.
1532 *
1533 * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output
1534 * so compositors know what's going on.
1535 */
1536 if (affected_crtc != requested_crtc) {
1537 drm_dbg_atomic(dev,
1538 "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n",
1539 requested_crtc, affected_crtc);
1540 WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n",
1541 requested_crtc, affected_crtc);
1542 }
1543
1544 return 0;
1545}
1546EXPORT_SYMBOL(drm_atomic_check_only);
1547
1548/**
1549 * drm_atomic_commit - commit configuration atomically
1550 * @state: atomic configuration to check
1551 *
1552 * Note that this function can return -EDEADLK if the driver needed to acquire
1553 * more locks but encountered a deadlock. The caller must then do the usual w/w
1554 * backoff dance and restart. All other errors are fatal.
1555 *
1556 * This function will take its own reference on @state.
1557 * Callers should always release their reference with drm_atomic_state_put().
1558 *
1559 * Returns:
1560 * 0 on success, negative error code on failure.
1561 */
1562int drm_atomic_commit(struct drm_atomic_state *state)
1563{
1564 struct drm_mode_config *config = &state->dev->mode_config;
1565 struct drm_printer p = drm_info_printer(dev: state->dev->dev);
1566 int ret;
1567
1568 if (drm_debug_enabled(DRM_UT_STATE))
1569 drm_atomic_print_new_state(state, p: &p);
1570
1571 ret = drm_atomic_check_only(state);
1572 if (ret)
1573 return ret;
1574
1575 drm_dbg_atomic(state->dev, "committing %p\n", state);
1576
1577 return config->funcs->atomic_commit(state->dev, state, false);
1578}
1579EXPORT_SYMBOL(drm_atomic_commit);
1580
1581/**
1582 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1583 * @state: atomic configuration to check
1584 *
1585 * Note that this function can return -EDEADLK if the driver needed to acquire
1586 * more locks but encountered a deadlock. The caller must then do the usual w/w
1587 * backoff dance and restart. All other errors are fatal.
1588 *
1589 * This function will take its own reference on @state.
1590 * Callers should always release their reference with drm_atomic_state_put().
1591 *
1592 * Returns:
1593 * 0 on success, negative error code on failure.
1594 */
1595int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1596{
1597 struct drm_mode_config *config = &state->dev->mode_config;
1598 int ret;
1599
1600 ret = drm_atomic_check_only(state);
1601 if (ret)
1602 return ret;
1603
1604 drm_dbg_atomic(state->dev, "committing %p nonblocking\n", state);
1605
1606 return config->funcs->atomic_commit(state->dev, state, true);
1607}
1608EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1609
1610/* just used from drm-client and atomic-helper: */
1611int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1612 struct drm_plane_state *plane_state)
1613{
1614 int ret;
1615
1616 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1617 if (ret != 0)
1618 return ret;
1619
1620 drm_atomic_set_fb_for_plane(plane_state, NULL);
1621 plane_state->crtc_x = 0;
1622 plane_state->crtc_y = 0;
1623 plane_state->crtc_w = 0;
1624 plane_state->crtc_h = 0;
1625 plane_state->src_x = 0;
1626 plane_state->src_y = 0;
1627 plane_state->src_w = 0;
1628 plane_state->src_h = 0;
1629
1630 return 0;
1631}
1632EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1633
1634static int update_output_state(struct drm_atomic_state *state,
1635 struct drm_mode_set *set)
1636{
1637 struct drm_device *dev = set->crtc->dev;
1638 struct drm_crtc *crtc;
1639 struct drm_crtc_state *new_crtc_state;
1640 struct drm_connector *connector;
1641 struct drm_connector_state *new_conn_state;
1642 int ret, i;
1643
1644 ret = drm_modeset_lock(lock: &dev->mode_config.connection_mutex,
1645 ctx: state->acquire_ctx);
1646 if (ret)
1647 return ret;
1648
1649 /* First disable all connectors on the target crtc. */
1650 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1651 if (ret)
1652 return ret;
1653
1654 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1655 if (new_conn_state->crtc == set->crtc) {
1656 ret = drm_atomic_set_crtc_for_connector(conn_state: new_conn_state,
1657 NULL);
1658 if (ret)
1659 return ret;
1660
1661 /* Make sure legacy setCrtc always re-trains */
1662 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1663 }
1664 }
1665
1666 /* Then set all connectors from set->connectors on the target crtc */
1667 for (i = 0; i < set->num_connectors; i++) {
1668 new_conn_state = drm_atomic_get_connector_state(state,
1669 set->connectors[i]);
1670 if (IS_ERR(ptr: new_conn_state))
1671 return PTR_ERR(ptr: new_conn_state);
1672
1673 ret = drm_atomic_set_crtc_for_connector(conn_state: new_conn_state,
1674 crtc: set->crtc);
1675 if (ret)
1676 return ret;
1677 }
1678
1679 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1680 /*
1681 * Don't update ->enable for the CRTC in the set_config request,
1682 * since a mismatch would indicate a bug in the upper layers.
1683 * The actual modeset code later on will catch any
1684 * inconsistencies here.
1685 */
1686 if (crtc == set->crtc)
1687 continue;
1688
1689 if (!new_crtc_state->connector_mask) {
1690 ret = drm_atomic_set_mode_prop_for_crtc(state: new_crtc_state,
1691 NULL);
1692 if (ret < 0)
1693 return ret;
1694
1695 new_crtc_state->active = false;
1696 }
1697 }
1698
1699 return 0;
1700}
1701
1702/* just used from drm-client and atomic-helper: */
1703int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1704 struct drm_atomic_state *state)
1705{
1706 struct drm_crtc_state *crtc_state;
1707 struct drm_plane_state *primary_state;
1708 struct drm_crtc *crtc = set->crtc;
1709 int hdisplay, vdisplay;
1710 int ret;
1711
1712 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1713 if (IS_ERR(ptr: crtc_state))
1714 return PTR_ERR(ptr: crtc_state);
1715
1716 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1717 if (IS_ERR(ptr: primary_state))
1718 return PTR_ERR(ptr: primary_state);
1719
1720 if (!set->mode) {
1721 WARN_ON(set->fb);
1722 WARN_ON(set->num_connectors);
1723
1724 ret = drm_atomic_set_mode_for_crtc(state: crtc_state, NULL);
1725 if (ret != 0)
1726 return ret;
1727
1728 crtc_state->active = false;
1729
1730 ret = drm_atomic_set_crtc_for_plane(plane_state: primary_state, NULL);
1731 if (ret != 0)
1732 return ret;
1733
1734 drm_atomic_set_fb_for_plane(plane_state: primary_state, NULL);
1735
1736 goto commit;
1737 }
1738
1739 WARN_ON(!set->fb);
1740 WARN_ON(!set->num_connectors);
1741
1742 ret = drm_atomic_set_mode_for_crtc(state: crtc_state, mode: set->mode);
1743 if (ret != 0)
1744 return ret;
1745
1746 crtc_state->active = true;
1747
1748 ret = drm_atomic_set_crtc_for_plane(plane_state: primary_state, crtc);
1749 if (ret != 0)
1750 return ret;
1751
1752 drm_mode_get_hv_timing(mode: set->mode, hdisplay: &hdisplay, vdisplay: &vdisplay);
1753
1754 drm_atomic_set_fb_for_plane(plane_state: primary_state, fb: set->fb);
1755 primary_state->crtc_x = 0;
1756 primary_state->crtc_y = 0;
1757 primary_state->crtc_w = hdisplay;
1758 primary_state->crtc_h = vdisplay;
1759 primary_state->src_x = set->x << 16;
1760 primary_state->src_y = set->y << 16;
1761 if (drm_rotation_90_or_270(rotation: primary_state->rotation)) {
1762 primary_state->src_w = vdisplay << 16;
1763 primary_state->src_h = hdisplay << 16;
1764 } else {
1765 primary_state->src_w = hdisplay << 16;
1766 primary_state->src_h = vdisplay << 16;
1767 }
1768
1769commit:
1770 ret = update_output_state(state, set);
1771 if (ret)
1772 return ret;
1773
1774 return 0;
1775}
1776EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1777
1778static void drm_atomic_private_obj_print_state(struct drm_printer *p,
1779 const struct drm_private_state *state)
1780{
1781 struct drm_private_obj *obj = state->obj;
1782
1783 if (obj->funcs->atomic_print_state)
1784 obj->funcs->atomic_print_state(p, state);
1785}
1786
1787/**
1788 * drm_atomic_print_new_state - prints drm atomic state
1789 * @state: atomic configuration to check
1790 * @p: drm printer
1791 *
1792 * This functions prints the drm atomic state snapshot using the drm printer
1793 * which is passed to it. This snapshot can be used for debugging purposes.
1794 *
1795 * Note that this function looks into the new state objects and hence its not
1796 * safe to be used after the call to drm_atomic_helper_commit_hw_done().
1797 */
1798void drm_atomic_print_new_state(const struct drm_atomic_state *state,
1799 struct drm_printer *p)
1800{
1801 struct drm_plane *plane;
1802 struct drm_plane_state *plane_state;
1803 struct drm_crtc *crtc;
1804 struct drm_crtc_state *crtc_state;
1805 struct drm_connector *connector;
1806 struct drm_connector_state *connector_state;
1807 struct drm_private_obj *obj;
1808 struct drm_private_state *obj_state;
1809 int i;
1810
1811 if (!p) {
1812 drm_err(state->dev, "invalid drm printer\n");
1813 return;
1814 }
1815
1816 drm_dbg_atomic(state->dev, "checking %p\n", state);
1817
1818 for_each_new_plane_in_state(state, plane, plane_state, i)
1819 drm_atomic_plane_print_state(p, state: plane_state);
1820
1821 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1822 drm_atomic_crtc_print_state(p, state: crtc_state);
1823
1824 for_each_new_connector_in_state(state, connector, connector_state, i)
1825 drm_atomic_connector_print_state(p, state: connector_state);
1826
1827 for_each_new_private_obj_in_state(state, obj, obj_state, i)
1828 drm_atomic_private_obj_print_state(p, state: obj_state);
1829}
1830EXPORT_SYMBOL(drm_atomic_print_new_state);
1831
1832static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1833 bool take_locks)
1834{
1835 struct drm_mode_config *config = &dev->mode_config;
1836 struct drm_plane *plane;
1837 struct drm_crtc *crtc;
1838 struct drm_connector *connector;
1839 struct drm_connector_list_iter conn_iter;
1840 struct drm_private_obj *obj;
1841
1842 if (!drm_drv_uses_atomic_modeset(dev))
1843 return;
1844
1845 list_for_each_entry(plane, &config->plane_list, head) {
1846 if (take_locks)
1847 drm_modeset_lock(lock: &plane->mutex, NULL);
1848 drm_atomic_plane_print_state(p, state: plane->state);
1849 if (take_locks)
1850 drm_modeset_unlock(lock: &plane->mutex);
1851 }
1852
1853 list_for_each_entry(crtc, &config->crtc_list, head) {
1854 if (take_locks)
1855 drm_modeset_lock(lock: &crtc->mutex, NULL);
1856 drm_atomic_crtc_print_state(p, state: crtc->state);
1857 if (take_locks)
1858 drm_modeset_unlock(lock: &crtc->mutex);
1859 }
1860
1861 drm_connector_list_iter_begin(dev, iter: &conn_iter);
1862 if (take_locks)
1863 drm_modeset_lock(lock: &dev->mode_config.connection_mutex, NULL);
1864 drm_for_each_connector_iter(connector, &conn_iter)
1865 drm_atomic_connector_print_state(p, state: connector->state);
1866 if (take_locks)
1867 drm_modeset_unlock(lock: &dev->mode_config.connection_mutex);
1868 drm_connector_list_iter_end(iter: &conn_iter);
1869
1870 list_for_each_entry(obj, &config->privobj_list, head) {
1871 if (take_locks)
1872 drm_modeset_lock(lock: &obj->lock, NULL);
1873 drm_atomic_private_obj_print_state(p, state: obj->state);
1874 if (take_locks)
1875 drm_modeset_unlock(lock: &obj->lock);
1876 }
1877}
1878
1879/**
1880 * drm_state_dump - dump entire device atomic state
1881 * @dev: the drm device
1882 * @p: where to print the state to
1883 *
1884 * Just for debugging. Drivers might want an option to dump state
1885 * to dmesg in case of error irq's. (Hint, you probably want to
1886 * ratelimit this!)
1887 *
1888 * The caller must wrap this drm_modeset_lock_all_ctx() and
1889 * drm_modeset_drop_locks(). If this is called from error irq handler, it should
1890 * not be enabled by default - if you are debugging errors you might
1891 * not care that this is racey, but calling this without all modeset locks held
1892 * is inherently unsafe.
1893 */
1894void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1895{
1896 __drm_state_dump(dev, p, take_locks: false);
1897}
1898EXPORT_SYMBOL(drm_state_dump);
1899
1900#ifdef CONFIG_DEBUG_FS
1901static int drm_state_info(struct seq_file *m, void *data)
1902{
1903 struct drm_debugfs_entry *entry = m->private;
1904 struct drm_device *dev = entry->dev;
1905 struct drm_printer p = drm_seq_file_printer(f: m);
1906
1907 __drm_state_dump(dev, p: &p, take_locks: true);
1908
1909 return 0;
1910}
1911
1912/* any use in debugfs files to dump individual planes/crtc/etc? */
1913static const struct drm_debugfs_info drm_atomic_debugfs_list[] = {
1914 {"state", drm_state_info, 0},
1915};
1916
1917void drm_atomic_debugfs_init(struct drm_device *dev)
1918{
1919 drm_debugfs_add_files(dev, files: drm_atomic_debugfs_list,
1920 ARRAY_SIZE(drm_atomic_debugfs_list));
1921}
1922#endif
1923