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#include <drm/drm_colorop.h>
46
47#include "drm_crtc_internal.h"
48#include "drm_internal.h"
49
50void __drm_crtc_commit_free(struct kref *kref)
51{
52 struct drm_crtc_commit *commit =
53 container_of(kref, struct drm_crtc_commit, ref);
54
55 kfree(objp: commit);
56}
57EXPORT_SYMBOL(__drm_crtc_commit_free);
58
59/**
60 * drm_crtc_commit_wait - Waits for a commit to complete
61 * @commit: &drm_crtc_commit to wait for
62 *
63 * Waits for a given &drm_crtc_commit to be programmed into the
64 * hardware and flipped to.
65 *
66 * Returns:
67 * 0 on success, a negative error code otherwise.
68 */
69int drm_crtc_commit_wait(struct drm_crtc_commit *commit)
70{
71 unsigned long timeout = 10 * HZ;
72 int ret;
73
74 if (!commit)
75 return 0;
76
77 ret = wait_for_completion_timeout(x: &commit->hw_done, timeout);
78 if (!ret) {
79 drm_err(commit->crtc->dev, "hw_done timed out\n");
80 return -ETIMEDOUT;
81 }
82
83 /*
84 * Currently no support for overwriting flips, hence
85 * stall for previous one to execute completely.
86 */
87 ret = wait_for_completion_timeout(x: &commit->flip_done, timeout);
88 if (!ret) {
89 drm_err(commit->crtc->dev, "flip_done timed out\n");
90 return -ETIMEDOUT;
91 }
92
93 return 0;
94}
95EXPORT_SYMBOL(drm_crtc_commit_wait);
96
97/**
98 * drm_atomic_state_default_release -
99 * release memory initialized by drm_atomic_state_init
100 * @state: atomic state
101 *
102 * Free all the memory allocated by drm_atomic_state_init.
103 * This should only be used by drivers which are still subclassing
104 * &drm_atomic_state and haven't switched to &drm_private_state yet.
105 */
106void drm_atomic_state_default_release(struct drm_atomic_state *state)
107{
108 kfree(objp: state->connectors);
109 kfree(objp: state->crtcs);
110 kfree(objp: state->planes);
111 kfree(objp: state->colorops);
112 kfree(objp: state->private_objs);
113}
114EXPORT_SYMBOL(drm_atomic_state_default_release);
115
116/**
117 * drm_atomic_state_init - init new atomic state
118 * @dev: DRM device
119 * @state: atomic state
120 *
121 * Default implementation for filling in a new atomic state.
122 * This should only be used by drivers which are still subclassing
123 * &drm_atomic_state and haven't switched to &drm_private_state yet.
124 */
125int
126drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
127{
128 kref_init(kref: &state->ref);
129
130 /* TODO legacy paths should maybe do a better job about
131 * setting this appropriately?
132 */
133 state->allow_modeset = true;
134
135 state->crtcs = kcalloc(dev->mode_config.num_crtc,
136 sizeof(*state->crtcs), GFP_KERNEL);
137 if (!state->crtcs)
138 goto fail;
139 state->planes = kcalloc(dev->mode_config.num_total_plane,
140 sizeof(*state->planes), GFP_KERNEL);
141 if (!state->planes)
142 goto fail;
143 state->colorops = kcalloc(dev->mode_config.num_colorop,
144 sizeof(*state->colorops), GFP_KERNEL);
145 if (!state->colorops)
146 goto fail;
147
148 /*
149 * Because drm_atomic_state can be committed asynchronously we need our
150 * own reference and cannot rely on the on implied by drm_file in the
151 * ioctl call.
152 */
153 drm_dev_get(dev);
154 state->dev = dev;
155
156 drm_dbg_atomic(dev, "Allocated atomic state %p\n", state);
157
158 return 0;
159fail:
160 drm_atomic_state_default_release(state);
161 return -ENOMEM;
162}
163EXPORT_SYMBOL(drm_atomic_state_init);
164
165/**
166 * drm_atomic_state_alloc - allocate atomic state
167 * @dev: DRM device
168 *
169 * This allocates an empty atomic state to track updates.
170 */
171struct drm_atomic_state *
172drm_atomic_state_alloc(struct drm_device *dev)
173{
174 struct drm_mode_config *config = &dev->mode_config;
175
176 if (!config->funcs->atomic_state_alloc) {
177 struct drm_atomic_state *state;
178
179 state = kzalloc(sizeof(*state), GFP_KERNEL);
180 if (!state)
181 return NULL;
182 if (drm_atomic_state_init(dev, state) < 0) {
183 kfree(objp: state);
184 return NULL;
185 }
186 return state;
187 }
188
189 return config->funcs->atomic_state_alloc(dev);
190}
191EXPORT_SYMBOL(drm_atomic_state_alloc);
192
193/**
194 * drm_atomic_state_default_clear - clear base atomic state
195 * @state: atomic state
196 *
197 * Default implementation for clearing atomic state.
198 * This should only be used by drivers which are still subclassing
199 * &drm_atomic_state and haven't switched to &drm_private_state yet.
200 */
201void drm_atomic_state_default_clear(struct drm_atomic_state *state)
202{
203 struct drm_device *dev = state->dev;
204 struct drm_mode_config *config = &dev->mode_config;
205 int i;
206
207 drm_dbg_atomic(dev, "Clearing atomic state %p\n", state);
208
209 state->checked = false;
210
211 for (i = 0; i < state->num_connector; i++) {
212 struct drm_connector *connector = state->connectors[i].ptr;
213
214 if (!connector)
215 continue;
216
217 connector->funcs->atomic_destroy_state(connector,
218 state->connectors[i].state_to_destroy);
219 state->connectors[i].ptr = NULL;
220 state->connectors[i].state_to_destroy = NULL;
221 state->connectors[i].old_state = NULL;
222 state->connectors[i].new_state = NULL;
223 drm_connector_put(connector);
224 }
225
226 for (i = 0; i < config->num_crtc; i++) {
227 struct drm_crtc *crtc = state->crtcs[i].ptr;
228
229 if (!crtc)
230 continue;
231
232 crtc->funcs->atomic_destroy_state(crtc,
233 state->crtcs[i].state_to_destroy);
234
235 state->crtcs[i].ptr = NULL;
236 state->crtcs[i].state_to_destroy = NULL;
237 state->crtcs[i].old_state = NULL;
238 state->crtcs[i].new_state = NULL;
239
240 if (state->crtcs[i].commit) {
241 drm_crtc_commit_put(commit: state->crtcs[i].commit);
242 state->crtcs[i].commit = NULL;
243 }
244 }
245
246 for (i = 0; i < config->num_total_plane; i++) {
247 struct drm_plane *plane = state->planes[i].ptr;
248
249 if (!plane)
250 continue;
251
252 plane->funcs->atomic_destroy_state(plane,
253 state->planes[i].state_to_destroy);
254 state->planes[i].ptr = NULL;
255 state->planes[i].state_to_destroy = NULL;
256 state->planes[i].old_state = NULL;
257 state->planes[i].new_state = NULL;
258 }
259
260 for (i = 0; i < config->num_colorop; i++) {
261 struct drm_colorop *colorop = state->colorops[i].ptr;
262
263 if (!colorop)
264 continue;
265
266 drm_colorop_atomic_destroy_state(colorop,
267 state: state->colorops[i].state);
268 state->colorops[i].ptr = NULL;
269 state->colorops[i].state = NULL;
270 state->colorops[i].old_state = NULL;
271 state->colorops[i].new_state = NULL;
272 }
273
274 for (i = 0; i < state->num_private_objs; i++) {
275 struct drm_private_obj *obj = state->private_objs[i].ptr;
276
277 obj->funcs->atomic_destroy_state(obj,
278 state->private_objs[i].state_to_destroy);
279 state->private_objs[i].ptr = NULL;
280 state->private_objs[i].state_to_destroy = NULL;
281 state->private_objs[i].old_state = NULL;
282 state->private_objs[i].new_state = NULL;
283 }
284 state->num_private_objs = 0;
285
286 if (state->fake_commit) {
287 drm_crtc_commit_put(commit: state->fake_commit);
288 state->fake_commit = NULL;
289 }
290}
291EXPORT_SYMBOL(drm_atomic_state_default_clear);
292
293/**
294 * drm_atomic_state_clear - clear state object
295 * @state: atomic state
296 *
297 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
298 * all locks. So someone else could sneak in and change the current modeset
299 * configuration. Which means that all the state assembled in @state is no
300 * longer an atomic update to the current state, but to some arbitrary earlier
301 * state. Which could break assumptions the driver's
302 * &drm_mode_config_funcs.atomic_check likely relies on.
303 *
304 * Hence we must clear all cached state and completely start over, using this
305 * function.
306 */
307void drm_atomic_state_clear(struct drm_atomic_state *state)
308{
309 struct drm_device *dev = state->dev;
310 struct drm_mode_config *config = &dev->mode_config;
311
312 if (config->funcs->atomic_state_clear)
313 config->funcs->atomic_state_clear(state);
314 else
315 drm_atomic_state_default_clear(state);
316}
317EXPORT_SYMBOL(drm_atomic_state_clear);
318
319/**
320 * __drm_atomic_state_free - free all memory for an atomic state
321 * @ref: This atomic state to deallocate
322 *
323 * This frees all memory associated with an atomic state, including all the
324 * per-object state for planes, CRTCs and connectors.
325 */
326void __drm_atomic_state_free(struct kref *ref)
327{
328 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
329 struct drm_device *dev = state->dev;
330 struct drm_mode_config *config = &dev->mode_config;
331
332 drm_atomic_state_clear(state);
333
334 drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state);
335
336 if (config->funcs->atomic_state_free) {
337 config->funcs->atomic_state_free(state);
338 } else {
339 drm_atomic_state_default_release(state);
340 kfree(objp: state);
341 }
342
343 drm_dev_put(dev);
344}
345EXPORT_SYMBOL(__drm_atomic_state_free);
346
347/**
348 * drm_atomic_get_crtc_state - get CRTC state
349 * @state: global atomic state object
350 * @crtc: CRTC to get state object for
351 *
352 * This function returns the CRTC state for the given CRTC, allocating it if
353 * needed. It will also grab the relevant CRTC lock to make sure that the state
354 * is consistent.
355 *
356 * WARNING: Drivers may only add new CRTC states to a @state if
357 * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit
358 * not created by userspace through an IOCTL call.
359 *
360 * Returns:
361 * Either the allocated state or the error code encoded into the pointer. When
362 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
363 * entire atomic sequence must be restarted. All other errors are fatal.
364 */
365struct drm_crtc_state *
366drm_atomic_get_crtc_state(struct drm_atomic_state *state,
367 struct drm_crtc *crtc)
368{
369 int ret, index = drm_crtc_index(crtc);
370 struct drm_crtc_state *crtc_state;
371
372 WARN_ON(!state->acquire_ctx);
373 drm_WARN_ON(state->dev, state->checked);
374
375 crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
376 if (crtc_state)
377 return crtc_state;
378
379 ret = drm_modeset_lock(lock: &crtc->mutex, ctx: state->acquire_ctx);
380 if (ret)
381 return ERR_PTR(error: ret);
382
383 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
384 if (!crtc_state)
385 return ERR_PTR(error: -ENOMEM);
386
387 state->crtcs[index].state_to_destroy = crtc_state;
388 state->crtcs[index].old_state = crtc->state;
389 state->crtcs[index].new_state = crtc_state;
390 state->crtcs[index].ptr = crtc;
391 crtc_state->state = state;
392
393 drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n",
394 crtc->base.id, crtc->name, crtc_state, state);
395
396 return crtc_state;
397}
398EXPORT_SYMBOL(drm_atomic_get_crtc_state);
399
400static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
401 const struct drm_crtc_state *new_crtc_state)
402{
403 struct drm_crtc *crtc = new_crtc_state->crtc;
404
405 /* NOTE: we explicitly don't enforce constraints such as primary
406 * layer covering entire screen, since that is something we want
407 * to allow (on hw that supports it). For hw that does not, it
408 * should be checked in driver's crtc->atomic_check() vfunc.
409 *
410 * TODO: Add generic modeset state checks once we support those.
411 */
412
413 if (new_crtc_state->active && !new_crtc_state->enable) {
414 drm_dbg_atomic(crtc->dev,
415 "[CRTC:%d:%s] active without enabled\n",
416 crtc->base.id, crtc->name);
417 return -EINVAL;
418 }
419
420 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
421 * as this is a kernel-internal detail that userspace should never
422 * be able to trigger.
423 */
424 if (drm_core_check_feature(dev: crtc->dev, feature: DRIVER_ATOMIC) &&
425 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
426 drm_dbg_atomic(crtc->dev,
427 "[CRTC:%d:%s] enabled without mode blob\n",
428 crtc->base.id, crtc->name);
429 return -EINVAL;
430 }
431
432 if (drm_core_check_feature(dev: crtc->dev, feature: DRIVER_ATOMIC) &&
433 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
434 drm_dbg_atomic(crtc->dev,
435 "[CRTC:%d:%s] disabled with mode blob\n",
436 crtc->base.id, crtc->name);
437 return -EINVAL;
438 }
439
440 /*
441 * Reject event generation for when a CRTC is off and stays off.
442 * It wouldn't be hard to implement this, but userspace has a track
443 * record of happily burning through 100% cpu (or worse, crash) when the
444 * display pipe is suspended. To avoid all that fun just reject updates
445 * that ask for events since likely that indicates a bug in the
446 * compositor's drawing loop. This is consistent with the vblank IOCTL
447 * and legacy page_flip IOCTL which also reject service on a disabled
448 * pipe.
449 */
450 if (new_crtc_state->event &&
451 !new_crtc_state->active && !old_crtc_state->active) {
452 drm_dbg_atomic(crtc->dev,
453 "[CRTC:%d:%s] requesting event but off\n",
454 crtc->base.id, crtc->name);
455 return -EINVAL;
456 }
457
458 return 0;
459}
460
461static void drm_atomic_crtc_print_state(struct drm_printer *p,
462 const struct drm_crtc_state *state)
463{
464 struct drm_crtc *crtc = state->crtc;
465
466 drm_printf(p, f: "crtc[%u]: %s\n", crtc->base.id, crtc->name);
467 drm_printf(p, f: "\tenable=%d\n", state->enable);
468 drm_printf(p, f: "\tactive=%d\n", state->active);
469 drm_printf(p, f: "\tself_refresh_active=%d\n", state->self_refresh_active);
470 drm_printf(p, f: "\tplanes_changed=%d\n", state->planes_changed);
471 drm_printf(p, f: "\tmode_changed=%d\n", state->mode_changed);
472 drm_printf(p, f: "\tactive_changed=%d\n", state->active_changed);
473 drm_printf(p, f: "\tconnectors_changed=%d\n", state->connectors_changed);
474 drm_printf(p, f: "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
475 drm_printf(p, f: "\tplane_mask=%x\n", state->plane_mask);
476 drm_printf(p, f: "\tconnector_mask=%x\n", state->connector_mask);
477 drm_printf(p, f: "\tencoder_mask=%x\n", state->encoder_mask);
478 drm_printf(p, f: "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
479
480 if (crtc->funcs->atomic_print_state)
481 crtc->funcs->atomic_print_state(p, state);
482}
483
484static int drm_atomic_connector_check(struct drm_connector *connector,
485 struct drm_connector_state *state)
486{
487 struct drm_crtc_state *crtc_state;
488 struct drm_writeback_job *writeback_job = state->writeback_job;
489 const struct drm_display_info *info = &connector->display_info;
490
491 state->max_bpc = info->bpc ? info->bpc : 8;
492 if (connector->max_bpc_property)
493 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
494
495 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
496 return 0;
497
498 if (writeback_job->fb && !state->crtc) {
499 drm_dbg_atomic(connector->dev,
500 "[CONNECTOR:%d:%s] framebuffer without CRTC\n",
501 connector->base.id, connector->name);
502 return -EINVAL;
503 }
504
505 if (state->crtc)
506 crtc_state = drm_atomic_get_new_crtc_state(state: state->state,
507 crtc: state->crtc);
508
509 if (writeback_job->fb && !crtc_state->active) {
510 drm_dbg_atomic(connector->dev,
511 "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
512 connector->base.id, connector->name,
513 state->crtc->base.id);
514 return -EINVAL;
515 }
516
517 if (!writeback_job->fb) {
518 if (writeback_job->out_fence) {
519 drm_dbg_atomic(connector->dev,
520 "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
521 connector->base.id, connector->name);
522 return -EINVAL;
523 }
524
525 drm_writeback_cleanup_job(job: writeback_job);
526 state->writeback_job = NULL;
527 }
528
529 return 0;
530}
531
532/**
533 * drm_atomic_get_plane_state - get plane state
534 * @state: global atomic state object
535 * @plane: plane to get state object for
536 *
537 * This function returns the plane state for the given plane, allocating it if
538 * needed. It will also grab the relevant plane lock to make sure that the state
539 * is consistent.
540 *
541 * Returns:
542 * Either the allocated state or the error code encoded into the pointer. When
543 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
544 * entire atomic sequence must be restarted. All other errors are fatal.
545 */
546struct drm_plane_state *
547drm_atomic_get_plane_state(struct drm_atomic_state *state,
548 struct drm_plane *plane)
549{
550 int ret, index = drm_plane_index(plane);
551 struct drm_plane_state *plane_state;
552
553 WARN_ON(!state->acquire_ctx);
554 drm_WARN_ON(state->dev, state->checked);
555
556 /* the legacy pointers should never be set */
557 WARN_ON(plane->fb);
558 WARN_ON(plane->old_fb);
559 WARN_ON(plane->crtc);
560
561 plane_state = drm_atomic_get_new_plane_state(state, plane);
562 if (plane_state)
563 return plane_state;
564
565 ret = drm_modeset_lock(lock: &plane->mutex, ctx: state->acquire_ctx);
566 if (ret)
567 return ERR_PTR(error: ret);
568
569 plane_state = plane->funcs->atomic_duplicate_state(plane);
570 if (!plane_state)
571 return ERR_PTR(error: -ENOMEM);
572
573 state->planes[index].state_to_destroy = plane_state;
574 state->planes[index].ptr = plane;
575 state->planes[index].old_state = plane->state;
576 state->planes[index].new_state = plane_state;
577 plane_state->state = state;
578
579 drm_dbg_atomic(plane->dev, "Added [PLANE:%d:%s] %p state to %p\n",
580 plane->base.id, plane->name, plane_state, state);
581
582 if (plane_state->crtc) {
583 struct drm_crtc_state *crtc_state;
584
585 crtc_state = drm_atomic_get_crtc_state(state,
586 plane_state->crtc);
587 if (IS_ERR(ptr: crtc_state))
588 return ERR_CAST(ptr: crtc_state);
589 }
590
591 return plane_state;
592}
593EXPORT_SYMBOL(drm_atomic_get_plane_state);
594
595/**
596 * drm_atomic_get_colorop_state - get colorop state
597 * @state: global atomic state object
598 * @colorop: colorop to get state object for
599 *
600 * This function returns the colorop state for the given colorop, allocating it
601 * if needed. It will also grab the relevant plane lock to make sure that the
602 * state is consistent.
603 *
604 * Returns:
605 *
606 * Either the allocated state or the error code encoded into the pointer. When
607 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
608 * entire atomic sequence must be restarted. All other errors are fatal.
609 */
610struct drm_colorop_state *
611drm_atomic_get_colorop_state(struct drm_atomic_state *state,
612 struct drm_colorop *colorop)
613{
614 int ret, index = drm_colorop_index(colorop);
615 struct drm_colorop_state *colorop_state;
616
617 WARN_ON(!state->acquire_ctx);
618
619 colorop_state = drm_atomic_get_new_colorop_state(state, colorop);
620 if (colorop_state)
621 return colorop_state;
622
623 ret = drm_modeset_lock(lock: &colorop->plane->mutex, ctx: state->acquire_ctx);
624 if (ret)
625 return ERR_PTR(error: ret);
626
627 colorop_state = drm_atomic_helper_colorop_duplicate_state(colorop);
628 if (!colorop_state)
629 return ERR_PTR(error: -ENOMEM);
630
631 state->colorops[index].state = colorop_state;
632 state->colorops[index].ptr = colorop;
633 state->colorops[index].old_state = colorop->state;
634 state->colorops[index].new_state = colorop_state;
635 colorop_state->state = state;
636
637 drm_dbg_atomic(colorop->dev, "Added [COLOROP:%d:%d] %p state to %p\n",
638 colorop->base.id, colorop->type, colorop_state, state);
639
640 return colorop_state;
641}
642EXPORT_SYMBOL(drm_atomic_get_colorop_state);
643
644static bool
645plane_switching_crtc(const struct drm_plane_state *old_plane_state,
646 const struct drm_plane_state *new_plane_state)
647{
648 if (!old_plane_state->crtc || !new_plane_state->crtc)
649 return false;
650
651 if (old_plane_state->crtc == new_plane_state->crtc)
652 return false;
653
654 /* This could be refined, but currently there's no helper or driver code
655 * to implement direct switching of active planes nor userspace to take
656 * advantage of more direct plane switching without the intermediate
657 * full OFF state.
658 */
659 return true;
660}
661
662/**
663 * drm_atomic_plane_check - check plane state
664 * @old_plane_state: old plane state to check
665 * @new_plane_state: new plane state to check
666 *
667 * Provides core sanity checks for plane state.
668 *
669 * RETURNS:
670 * Zero on success, error code on failure
671 */
672static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
673 const struct drm_plane_state *new_plane_state)
674{
675 struct drm_plane *plane = new_plane_state->plane;
676 struct drm_crtc *crtc = new_plane_state->crtc;
677 const struct drm_framebuffer *fb = new_plane_state->fb;
678 unsigned int fb_width, fb_height;
679 struct drm_mode_rect *clips;
680 uint32_t num_clips;
681
682 /* either *both* CRTC and FB must be set, or neither */
683 if (crtc && !fb) {
684 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n",
685 plane->base.id, plane->name);
686 return -EINVAL;
687 } else if (fb && !crtc) {
688 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] FB set but no CRTC\n",
689 plane->base.id, plane->name);
690 return -EINVAL;
691 }
692
693 /* if disabled, we don't care about the rest of the state: */
694 if (!crtc)
695 return 0;
696
697 /* Check whether this plane is usable on this CRTC */
698 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
699 drm_dbg_atomic(plane->dev,
700 "Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
701 crtc->base.id, crtc->name,
702 plane->base.id, plane->name);
703 return -EINVAL;
704 }
705
706 /* Check whether this plane supports the fb pixel format. */
707 if (!drm_plane_has_format(plane, format: fb->format->format, modifier: fb->modifier)) {
708 drm_dbg_atomic(plane->dev,
709 "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
710 plane->base.id, plane->name,
711 &fb->format->format, fb->modifier);
712 return -EINVAL;
713 }
714
715 /* Give drivers some help against integer overflows */
716 if (new_plane_state->crtc_w > INT_MAX ||
717 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
718 new_plane_state->crtc_h > INT_MAX ||
719 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
720 drm_dbg_atomic(plane->dev,
721 "[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
722 plane->base.id, plane->name,
723 new_plane_state->crtc_w, new_plane_state->crtc_h,
724 new_plane_state->crtc_x, new_plane_state->crtc_y);
725 return -ERANGE;
726 }
727
728 fb_width = fb->width << 16;
729 fb_height = fb->height << 16;
730
731 /* Make sure source coordinates are inside the fb. */
732 if (new_plane_state->src_w > fb_width ||
733 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
734 new_plane_state->src_h > fb_height ||
735 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
736 drm_dbg_atomic(plane->dev,
737 "[PLANE:%d:%s] invalid source coordinates "
738 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
739 plane->base.id, plane->name,
740 new_plane_state->src_w >> 16,
741 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
742 new_plane_state->src_h >> 16,
743 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
744 new_plane_state->src_x >> 16,
745 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
746 new_plane_state->src_y >> 16,
747 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
748 fb->width, fb->height);
749 return -ENOSPC;
750 }
751
752 clips = __drm_plane_get_damage_clips(state: new_plane_state);
753 num_clips = drm_plane_get_damage_clips_count(state: new_plane_state);
754
755 /* Make sure damage clips are valid and inside the fb. */
756 while (num_clips > 0) {
757 if (clips->x1 >= clips->x2 ||
758 clips->y1 >= clips->y2 ||
759 clips->x1 < 0 ||
760 clips->y1 < 0 ||
761 clips->x2 > fb_width ||
762 clips->y2 > fb_height) {
763 drm_dbg_atomic(plane->dev,
764 "[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
765 plane->base.id, plane->name, clips->x1,
766 clips->y1, clips->x2, clips->y2);
767 return -EINVAL;
768 }
769 clips++;
770 num_clips--;
771 }
772
773 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
774 drm_dbg_atomic(plane->dev,
775 "[PLANE:%d:%s] switching CRTC directly\n",
776 plane->base.id, plane->name);
777 return -EINVAL;
778 }
779
780 return 0;
781}
782
783static void drm_atomic_colorop_print_state(struct drm_printer *p,
784 const struct drm_colorop_state *state)
785{
786 struct drm_colorop *colorop = state->colorop;
787
788 drm_printf(p, f: "colorop[%u]:\n", colorop->base.id);
789 drm_printf(p, f: "\ttype=%s\n", drm_get_colorop_type_name(type: colorop->type));
790 if (colorop->bypass_property)
791 drm_printf(p, f: "\tbypass=%u\n", state->bypass);
792
793 switch (colorop->type) {
794 case DRM_COLOROP_1D_CURVE:
795 drm_printf(p, f: "\tcurve_1d_type=%s\n",
796 drm_get_colorop_curve_1d_type_name(type: state->curve_1d_type));
797 break;
798 case DRM_COLOROP_1D_LUT:
799 drm_printf(p, f: "\tsize=%d\n", colorop->size);
800 drm_printf(p, f: "\tinterpolation=%s\n",
801 drm_get_colorop_lut1d_interpolation_name(type: colorop->lut1d_interpolation));
802 drm_printf(p, f: "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
803 break;
804 case DRM_COLOROP_CTM_3X4:
805 drm_printf(p, f: "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
806 break;
807 case DRM_COLOROP_MULTIPLIER:
808 drm_printf(p, f: "\tmultiplier=%llu\n", state->multiplier);
809 break;
810 case DRM_COLOROP_3D_LUT:
811 drm_printf(p, f: "\tsize=%d\n", colorop->size);
812 drm_printf(p, f: "\tinterpolation=%s\n",
813 drm_get_colorop_lut3d_interpolation_name(type: colorop->lut3d_interpolation));
814 drm_printf(p, f: "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
815 break;
816 default:
817 break;
818 }
819
820 drm_printf(p, f: "\tnext=%d\n", colorop->next ? colorop->next->base.id : 0);
821}
822
823static void drm_atomic_plane_print_state(struct drm_printer *p,
824 const struct drm_plane_state *state)
825{
826 struct drm_plane *plane = state->plane;
827 struct drm_rect src = drm_plane_state_src(state);
828 struct drm_rect dest = drm_plane_state_dest(state);
829
830 drm_printf(p, f: "plane[%u]: %s\n", plane->base.id, plane->name);
831 drm_printf(p, f: "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
832 drm_printf(p, f: "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
833 if (state->fb)
834 drm_framebuffer_print_info(p, indent: 2, fb: state->fb);
835 drm_printf(p, f: "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
836 drm_printf(p, f: "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
837 drm_printf(p, f: "\trotation=%x\n", state->rotation);
838 drm_printf(p, f: "\tnormalized-zpos=%x\n", state->normalized_zpos);
839 drm_printf(p, f: "\tcolor-encoding=%s\n",
840 drm_get_color_encoding_name(encoding: state->color_encoding));
841 drm_printf(p, f: "\tcolor-range=%s\n",
842 drm_get_color_range_name(range: state->color_range));
843 drm_printf(p, f: "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
844 drm_printf(p, f: "\tcolor-pipeline=%d\n",
845 state->color_pipeline ? state->color_pipeline->base.id : 0);
846 if (plane->funcs->atomic_print_state)
847 plane->funcs->atomic_print_state(p, state);
848}
849
850/**
851 * DOC: handling driver private state
852 *
853 * Very often the DRM objects exposed to userspace in the atomic modeset api
854 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
855 * underlying hardware. Especially for any kind of shared resources (e.g. shared
856 * clocks, scaler units, bandwidth and fifo limits shared among a group of
857 * planes or CRTCs, and so on) it makes sense to model these as independent
858 * objects. Drivers then need to do similar state tracking and commit ordering for
859 * such private (since not exposed to userspace) objects as the atomic core and
860 * helpers already provide for connectors, planes and CRTCs.
861 *
862 * To make this easier on drivers the atomic core provides some support to track
863 * driver private state objects using struct &drm_private_obj, with the
864 * associated state struct &drm_private_state.
865 *
866 * Similar to userspace-exposed objects, private state structures can be
867 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care
868 * of locking, hence drivers should not have a need to call drm_modeset_lock()
869 * directly. Sequence of the actual hardware state commit is not handled,
870 * drivers might need to keep track of struct drm_crtc_commit within subclassed
871 * structure of &drm_private_state as necessary, e.g. similar to
872 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
873 *
874 * All private state structures contained in a &drm_atomic_state update can be
875 * iterated using for_each_oldnew_private_obj_in_state(),
876 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
877 * Drivers are recommended to wrap these for each type of driver private state
878 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
879 * least if they want to iterate over all objects of a given type.
880 *
881 * An earlier way to handle driver private state was by subclassing struct
882 * &drm_atomic_state. But since that encourages non-standard ways to implement
883 * the check/commit split atomic requires (by using e.g. "check and rollback or
884 * commit instead" of "duplicate state, check, then either commit or release
885 * duplicated state) it is deprecated in favour of using &drm_private_state.
886 */
887
888/**
889 * drm_atomic_private_obj_init - initialize private object
890 * @dev: DRM device this object will be attached to
891 * @obj: private object
892 * @state: initial private object state
893 * @funcs: pointer to the struct of function pointers that identify the object
894 * type
895 *
896 * Initialize the private object, which can be embedded into any
897 * driver private object that needs its own atomic state.
898 */
899void
900drm_atomic_private_obj_init(struct drm_device *dev,
901 struct drm_private_obj *obj,
902 struct drm_private_state *state,
903 const struct drm_private_state_funcs *funcs)
904{
905 memset(obj, 0, sizeof(*obj));
906
907 drm_modeset_lock_init(lock: &obj->lock);
908
909 obj->state = state;
910 obj->funcs = funcs;
911 list_add_tail(new: &obj->head, head: &dev->mode_config.privobj_list);
912
913 state->obj = obj;
914}
915EXPORT_SYMBOL(drm_atomic_private_obj_init);
916
917/**
918 * drm_atomic_private_obj_fini - finalize private object
919 * @obj: private object
920 *
921 * Finalize the private object.
922 */
923void
924drm_atomic_private_obj_fini(struct drm_private_obj *obj)
925{
926 list_del(entry: &obj->head);
927 obj->funcs->atomic_destroy_state(obj, obj->state);
928 drm_modeset_lock_fini(lock: &obj->lock);
929}
930EXPORT_SYMBOL(drm_atomic_private_obj_fini);
931
932/**
933 * drm_atomic_get_private_obj_state - get private object state
934 * @state: global atomic state
935 * @obj: private object to get the state for
936 *
937 * This function returns the private object state for the given private object,
938 * allocating the state if needed. It will also grab the relevant private
939 * object lock to make sure that the state is consistent.
940 *
941 * RETURNS:
942 * Either the allocated state or the error code encoded into a pointer.
943 */
944struct drm_private_state *
945drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
946 struct drm_private_obj *obj)
947{
948 int index, num_objs, ret;
949 size_t size;
950 struct __drm_private_objs_state *arr;
951 struct drm_private_state *obj_state;
952
953 WARN_ON(!state->acquire_ctx);
954 drm_WARN_ON(state->dev, state->checked);
955
956 obj_state = drm_atomic_get_new_private_obj_state(state, obj);
957 if (obj_state)
958 return obj_state;
959
960 ret = drm_modeset_lock(lock: &obj->lock, ctx: state->acquire_ctx);
961 if (ret)
962 return ERR_PTR(error: ret);
963
964 num_objs = state->num_private_objs + 1;
965 size = sizeof(*state->private_objs) * num_objs;
966 arr = krealloc(state->private_objs, size, GFP_KERNEL);
967 if (!arr)
968 return ERR_PTR(error: -ENOMEM);
969
970 state->private_objs = arr;
971 index = state->num_private_objs;
972 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
973
974 obj_state = obj->funcs->atomic_duplicate_state(obj);
975 if (!obj_state)
976 return ERR_PTR(error: -ENOMEM);
977
978 state->private_objs[index].state_to_destroy = obj_state;
979 state->private_objs[index].old_state = obj->state;
980 state->private_objs[index].new_state = obj_state;
981 state->private_objs[index].ptr = obj;
982 obj_state->state = state;
983
984 state->num_private_objs = num_objs;
985
986 drm_dbg_atomic(state->dev,
987 "Added new private object %p state %p to %p\n",
988 obj, obj_state, state);
989
990 return obj_state;
991}
992EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
993
994/**
995 * drm_atomic_get_old_private_obj_state
996 * @state: global atomic state object
997 * @obj: private_obj to grab
998 *
999 * This function returns the old private object state for the given private_obj,
1000 * or NULL if the private_obj is not part of the global atomic state.
1001 */
1002struct drm_private_state *
1003drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state,
1004 struct drm_private_obj *obj)
1005{
1006 int i;
1007
1008 for (i = 0; i < state->num_private_objs; i++)
1009 if (obj == state->private_objs[i].ptr)
1010 return state->private_objs[i].old_state;
1011
1012 return NULL;
1013}
1014EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
1015
1016/**
1017 * drm_atomic_get_new_private_obj_state
1018 * @state: global atomic state object
1019 * @obj: private_obj to grab
1020 *
1021 * This function returns the new private object state for the given private_obj,
1022 * or NULL if the private_obj is not part of the global atomic state.
1023 */
1024struct drm_private_state *
1025drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state,
1026 struct drm_private_obj *obj)
1027{
1028 int i;
1029
1030 for (i = 0; i < state->num_private_objs; i++)
1031 if (obj == state->private_objs[i].ptr)
1032 return state->private_objs[i].new_state;
1033
1034 return NULL;
1035}
1036EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
1037
1038/**
1039 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
1040 * @state: Atomic state
1041 * @encoder: The encoder to fetch the connector state for
1042 *
1043 * This function finds and returns the connector that was connected to @encoder
1044 * as specified by the @state.
1045 *
1046 * If there is no connector in @state which previously had @encoder connected to
1047 * it, this function will return NULL. While this may seem like an invalid use
1048 * case, it is sometimes useful to differentiate commits which had no prior
1049 * connectors attached to @encoder vs ones that did (and to inspect their
1050 * state). This is especially true in enable hooks because the pipeline has
1051 * changed.
1052 *
1053 * If you don't have access to the atomic state, see
1054 * drm_atomic_get_connector_for_encoder().
1055 *
1056 * Returns: The old connector connected to @encoder, or NULL if the encoder is
1057 * not connected.
1058 */
1059struct drm_connector *
1060drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state,
1061 struct drm_encoder *encoder)
1062{
1063 struct drm_connector_state *conn_state;
1064 struct drm_connector *connector;
1065 unsigned int i;
1066
1067 for_each_old_connector_in_state(state, connector, conn_state, i) {
1068 if (conn_state->best_encoder == encoder)
1069 return connector;
1070 }
1071
1072 return NULL;
1073}
1074EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
1075
1076/**
1077 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
1078 * @state: Atomic state
1079 * @encoder: The encoder to fetch the connector state for
1080 *
1081 * This function finds and returns the connector that will be connected to
1082 * @encoder as specified by the @state.
1083 *
1084 * If there is no connector in @state which will have @encoder connected to it,
1085 * this function will return NULL. While this may seem like an invalid use case,
1086 * it is sometimes useful to differentiate commits which have no connectors
1087 * attached to @encoder vs ones that do (and to inspect their state). This is
1088 * especially true in disable hooks because the pipeline will change.
1089 *
1090 * If you don't have access to the atomic state, see
1091 * drm_atomic_get_connector_for_encoder().
1092 *
1093 * Returns: The new connector connected to @encoder, or NULL if the encoder is
1094 * not connected.
1095 */
1096struct drm_connector *
1097drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,
1098 struct drm_encoder *encoder)
1099{
1100 struct drm_connector_state *conn_state;
1101 struct drm_connector *connector;
1102 unsigned int i;
1103
1104 for_each_new_connector_in_state(state, connector, conn_state, i) {
1105 if (conn_state->best_encoder == encoder)
1106 return connector;
1107 }
1108
1109 return NULL;
1110}
1111EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
1112
1113/**
1114 * drm_atomic_get_connector_for_encoder - Get connector currently assigned to an encoder
1115 * @encoder: The encoder to find the connector of
1116 * @ctx: Modeset locking context
1117 *
1118 * This function finds and returns the connector currently assigned to
1119 * an @encoder.
1120 *
1121 * It is similar to the drm_atomic_get_old_connector_for_encoder() and
1122 * drm_atomic_get_new_connector_for_encoder() helpers, but doesn't
1123 * require access to the atomic state. If you have access to it, prefer
1124 * using these. This helper is typically useful in situations where you
1125 * don't have access to the atomic state, like detect, link repair,
1126 * threaded interrupt handlers, or hooks from other frameworks (ALSA,
1127 * CEC, etc.).
1128 *
1129 * Returns:
1130 * The connector connected to @encoder, or an error pointer otherwise.
1131 * When the error is EDEADLK, a deadlock has been detected and the
1132 * sequence must be restarted.
1133 */
1134struct drm_connector *
1135drm_atomic_get_connector_for_encoder(const struct drm_encoder *encoder,
1136 struct drm_modeset_acquire_ctx *ctx)
1137{
1138 struct drm_connector_list_iter conn_iter;
1139 struct drm_connector *out_connector = ERR_PTR(error: -EINVAL);
1140 struct drm_connector *connector;
1141 struct drm_device *dev = encoder->dev;
1142 int ret;
1143
1144 ret = drm_modeset_lock(lock: &dev->mode_config.connection_mutex, ctx);
1145 if (ret)
1146 return ERR_PTR(error: ret);
1147
1148 drm_connector_list_iter_begin(dev, iter: &conn_iter);
1149 drm_for_each_connector_iter(connector, &conn_iter) {
1150 if (!connector->state)
1151 continue;
1152
1153 if (encoder == connector->state->best_encoder) {
1154 out_connector = connector;
1155 break;
1156 }
1157 }
1158 drm_connector_list_iter_end(iter: &conn_iter);
1159 drm_modeset_unlock(lock: &dev->mode_config.connection_mutex);
1160
1161 return out_connector;
1162}
1163EXPORT_SYMBOL(drm_atomic_get_connector_for_encoder);
1164
1165
1166/**
1167 * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder
1168 * @state: Atomic state
1169 * @encoder: The encoder to fetch the crtc state for
1170 *
1171 * This function finds and returns the crtc that was connected to @encoder
1172 * as specified by the @state.
1173 *
1174 * Returns: The old crtc connected to @encoder, or NULL if the encoder is
1175 * not connected.
1176 */
1177struct drm_crtc *
1178drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_state *state,
1179 struct drm_encoder *encoder)
1180{
1181 struct drm_connector *connector;
1182 struct drm_connector_state *conn_state;
1183
1184 connector = drm_atomic_get_old_connector_for_encoder(state, encoder);
1185 if (!connector)
1186 return NULL;
1187
1188 conn_state = drm_atomic_get_old_connector_state(state, connector);
1189 if (!conn_state)
1190 return NULL;
1191
1192 return conn_state->crtc;
1193}
1194EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder);
1195
1196/**
1197 * drm_atomic_get_new_crtc_for_encoder - Get new crtc for an encoder
1198 * @state: Atomic state
1199 * @encoder: The encoder to fetch the crtc state for
1200 *
1201 * This function finds and returns the crtc that will be connected to @encoder
1202 * as specified by the @state.
1203 *
1204 * Returns: The new crtc connected to @encoder, or NULL if the encoder is
1205 * not connected.
1206 */
1207struct drm_crtc *
1208drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_state *state,
1209 struct drm_encoder *encoder)
1210{
1211 struct drm_connector *connector;
1212 struct drm_connector_state *conn_state;
1213
1214 connector = drm_atomic_get_new_connector_for_encoder(state, encoder);
1215 if (!connector)
1216 return NULL;
1217
1218 conn_state = drm_atomic_get_new_connector_state(state, connector);
1219 if (!conn_state)
1220 return NULL;
1221
1222 return conn_state->crtc;
1223}
1224EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder);
1225
1226/**
1227 * drm_atomic_get_connector_state - get connector state
1228 * @state: global atomic state object
1229 * @connector: connector to get state object for
1230 *
1231 * This function returns the connector state for the given connector,
1232 * allocating it if needed. It will also grab the relevant connector lock to
1233 * make sure that the state is consistent.
1234 *
1235 * Returns:
1236 * Either the allocated state or the error code encoded into the pointer. When
1237 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1238 * entire atomic sequence must be restarted. All other errors are fatal.
1239 */
1240struct drm_connector_state *
1241drm_atomic_get_connector_state(struct drm_atomic_state *state,
1242 struct drm_connector *connector)
1243{
1244 int ret, index;
1245 struct drm_mode_config *config = &connector->dev->mode_config;
1246 struct drm_connector_state *connector_state;
1247
1248 WARN_ON(!state->acquire_ctx);
1249 drm_WARN_ON(state->dev, state->checked);
1250
1251 ret = drm_modeset_lock(lock: &config->connection_mutex, ctx: state->acquire_ctx);
1252 if (ret)
1253 return ERR_PTR(error: ret);
1254
1255 index = drm_connector_index(connector);
1256
1257 if (index >= state->num_connector) {
1258 struct __drm_connnectors_state *c;
1259 int alloc = max(index + 1, config->num_connector);
1260
1261 c = krealloc_array(state->connectors, alloc,
1262 sizeof(*state->connectors), GFP_KERNEL);
1263 if (!c)
1264 return ERR_PTR(error: -ENOMEM);
1265
1266 state->connectors = c;
1267 memset(&state->connectors[state->num_connector], 0,
1268 sizeof(*state->connectors) * (alloc - state->num_connector));
1269
1270 state->num_connector = alloc;
1271 }
1272
1273 connector_state = drm_atomic_get_new_connector_state(state, connector);
1274 if (connector_state)
1275 return connector_state;
1276
1277 connector_state = connector->funcs->atomic_duplicate_state(connector);
1278 if (!connector_state)
1279 return ERR_PTR(error: -ENOMEM);
1280
1281 drm_connector_get(connector);
1282 state->connectors[index].state_to_destroy = connector_state;
1283 state->connectors[index].old_state = connector->state;
1284 state->connectors[index].new_state = connector_state;
1285 state->connectors[index].ptr = connector;
1286 connector_state->state = state;
1287
1288 drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n",
1289 connector->base.id, connector->name,
1290 connector_state, state);
1291
1292 if (connector_state->crtc) {
1293 struct drm_crtc_state *crtc_state;
1294
1295 crtc_state = drm_atomic_get_crtc_state(state,
1296 connector_state->crtc);
1297 if (IS_ERR(ptr: crtc_state))
1298 return ERR_CAST(ptr: crtc_state);
1299 }
1300
1301 return connector_state;
1302}
1303EXPORT_SYMBOL(drm_atomic_get_connector_state);
1304
1305static void drm_atomic_connector_print_state(struct drm_printer *p,
1306 const struct drm_connector_state *state)
1307{
1308 struct drm_connector *connector = state->connector;
1309
1310 drm_printf(p, f: "connector[%u]: %s\n", connector->base.id, connector->name);
1311 drm_printf(p, f: "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1312 drm_printf(p, f: "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1313 drm_printf(p, f: "\tinterlace_allowed=%d\n", connector->interlace_allowed);
1314 drm_printf(p, f: "\tycbcr_420_allowed=%d\n", connector->ycbcr_420_allowed);
1315 drm_printf(p, f: "\tmax_requested_bpc=%d\n", state->max_requested_bpc);
1316 drm_printf(p, f: "\tcolorspace=%s\n", drm_get_colorspace_name(colorspace: state->colorspace));
1317
1318 if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
1319 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
1320 drm_printf(p, f: "\tbroadcast_rgb=%s\n",
1321 drm_hdmi_connector_get_broadcast_rgb_name(broadcast_rgb: state->hdmi.broadcast_rgb));
1322 drm_printf(p, f: "\tis_limited_range=%c\n", state->hdmi.is_limited_range ? 'y' : 'n');
1323 drm_printf(p, f: "\toutput_bpc=%u\n", state->hdmi.output_bpc);
1324 drm_printf(p, f: "\toutput_format=%s\n",
1325 drm_hdmi_connector_get_output_format_name(fmt: state->hdmi.output_format));
1326 drm_printf(p, f: "\ttmds_char_rate=%llu\n", state->hdmi.tmds_char_rate);
1327 }
1328
1329 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1330 if (state->writeback_job && state->writeback_job->fb)
1331 drm_printf(p, f: "\tfb=%d\n", state->writeback_job->fb->base.id);
1332
1333 if (connector->funcs->atomic_print_state)
1334 connector->funcs->atomic_print_state(p, state);
1335}
1336
1337/**
1338 * drm_atomic_get_bridge_state - get bridge state
1339 * @state: global atomic state object
1340 * @bridge: bridge to get state object for
1341 *
1342 * This function returns the bridge state for the given bridge, allocating it
1343 * if needed. It will also grab the relevant bridge lock to make sure that the
1344 * state is consistent.
1345 *
1346 * Returns:
1347 * Either the allocated state or the error code encoded into the pointer. When
1348 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1349 * entire atomic sequence must be restarted.
1350 */
1351struct drm_bridge_state *
1352drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1353 struct drm_bridge *bridge)
1354{
1355 struct drm_private_state *obj_state;
1356
1357 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
1358 if (IS_ERR(ptr: obj_state))
1359 return ERR_CAST(ptr: obj_state);
1360
1361 return drm_priv_to_bridge_state(priv: obj_state);
1362}
1363EXPORT_SYMBOL(drm_atomic_get_bridge_state);
1364
1365/**
1366 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
1367 * @state: global atomic state object
1368 * @bridge: bridge to grab
1369 *
1370 * This function returns the old bridge state for the given bridge, or NULL if
1371 * the bridge is not part of the global atomic state.
1372 */
1373struct drm_bridge_state *
1374drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,
1375 struct drm_bridge *bridge)
1376{
1377 struct drm_private_state *obj_state;
1378
1379 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
1380 if (!obj_state)
1381 return NULL;
1382
1383 return drm_priv_to_bridge_state(priv: obj_state);
1384}
1385EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
1386
1387/**
1388 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
1389 * @state: global atomic state object
1390 * @bridge: bridge to grab
1391 *
1392 * This function returns the new bridge state for the given bridge, or NULL if
1393 * the bridge is not part of the global atomic state.
1394 */
1395struct drm_bridge_state *
1396drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state,
1397 struct drm_bridge *bridge)
1398{
1399 struct drm_private_state *obj_state;
1400
1401 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
1402 if (!obj_state)
1403 return NULL;
1404
1405 return drm_priv_to_bridge_state(priv: obj_state);
1406}
1407EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
1408
1409/**
1410 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder
1411 * @state: atomic state
1412 * @encoder: DRM encoder
1413 *
1414 * This function adds all bridges attached to @encoder. This is needed to add
1415 * bridge states to @state and make them available when
1416 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),
1417 * &drm_bridge_funcs.atomic_enable(),
1418 * &drm_bridge_funcs.atomic_disable_post_disable() are called.
1419 *
1420 * Returns:
1421 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1422 * then the w/w mutex code has detected a deadlock and the entire atomic
1423 * sequence must be restarted. All other errors are fatal.
1424 */
1425int
1426drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
1427 struct drm_encoder *encoder)
1428{
1429 struct drm_bridge_state *bridge_state;
1430
1431 if (!encoder)
1432 return 0;
1433
1434 drm_dbg_atomic(encoder->dev,
1435 "Adding all bridges for [encoder:%d:%s] to %p\n",
1436 encoder->base.id, encoder->name, state);
1437
1438 drm_for_each_bridge_in_chain_scoped(encoder, bridge) {
1439 /* Skip bridges that don't implement the atomic state hooks. */
1440 if (!bridge->funcs->atomic_duplicate_state)
1441 continue;
1442
1443 bridge_state = drm_atomic_get_bridge_state(state, bridge);
1444 if (IS_ERR(ptr: bridge_state))
1445 return PTR_ERR(ptr: bridge_state);
1446 }
1447
1448 return 0;
1449}
1450EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
1451
1452/**
1453 * drm_atomic_add_affected_connectors - add connectors for CRTC
1454 * @state: atomic state
1455 * @crtc: DRM CRTC
1456 *
1457 * This function walks the current configuration and adds all connectors
1458 * currently using @crtc to the atomic configuration @state. Note that this
1459 * function must acquire the connection mutex. This can potentially cause
1460 * unneeded serialization if the update is just for the planes on one CRTC. Hence
1461 * drivers and helpers should only call this when really needed (e.g. when a
1462 * full modeset needs to happen due to some change).
1463 *
1464 * Returns:
1465 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1466 * then the w/w mutex code has detected a deadlock and the entire atomic
1467 * sequence must be restarted. All other errors are fatal.
1468 */
1469int
1470drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1471 struct drm_crtc *crtc)
1472{
1473 struct drm_mode_config *config = &state->dev->mode_config;
1474 struct drm_connector *connector;
1475 struct drm_connector_state *conn_state;
1476 struct drm_connector_list_iter conn_iter;
1477 struct drm_crtc_state *crtc_state;
1478 int ret;
1479
1480 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1481 if (IS_ERR(ptr: crtc_state))
1482 return PTR_ERR(ptr: crtc_state);
1483
1484 ret = drm_modeset_lock(lock: &config->connection_mutex, ctx: state->acquire_ctx);
1485 if (ret)
1486 return ret;
1487
1488 drm_dbg_atomic(crtc->dev,
1489 "Adding all current connectors for [CRTC:%d:%s] to %p\n",
1490 crtc->base.id, crtc->name, state);
1491
1492 /*
1493 * Changed connectors are already in @state, so only need to look
1494 * at the connector_mask in crtc_state.
1495 */
1496 drm_connector_list_iter_begin(dev: state->dev, iter: &conn_iter);
1497 drm_for_each_connector_iter(connector, &conn_iter) {
1498 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1499 continue;
1500
1501 conn_state = drm_atomic_get_connector_state(state, connector);
1502 if (IS_ERR(ptr: conn_state)) {
1503 drm_connector_list_iter_end(iter: &conn_iter);
1504 return PTR_ERR(ptr: conn_state);
1505 }
1506 }
1507 drm_connector_list_iter_end(iter: &conn_iter);
1508
1509 return 0;
1510}
1511EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1512
1513/**
1514 * drm_atomic_add_affected_planes - add planes for CRTC
1515 * @state: atomic state
1516 * @crtc: DRM CRTC
1517 *
1518 * This function walks the current configuration and adds all planes
1519 * currently used by @crtc to the atomic configuration @state. This is useful
1520 * when an atomic commit also needs to check all currently enabled plane on
1521 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1522 * to avoid special code to force-enable all planes.
1523 *
1524 * Since acquiring a plane state will always also acquire the w/w mutex of the
1525 * current CRTC for that plane (if there is any) adding all the plane states for
1526 * a CRTC will not reduce parallelism of atomic updates.
1527 *
1528 * Returns:
1529 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1530 * then the w/w mutex code has detected a deadlock and the entire atomic
1531 * sequence must be restarted. All other errors are fatal.
1532 */
1533int
1534drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1535 struct drm_crtc *crtc)
1536{
1537 const struct drm_crtc_state *old_crtc_state =
1538 drm_atomic_get_old_crtc_state(state, crtc);
1539 struct drm_plane *plane;
1540
1541 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1542
1543 drm_dbg_atomic(crtc->dev,
1544 "Adding all current planes for [CRTC:%d:%s] to %p\n",
1545 crtc->base.id, crtc->name, state);
1546
1547 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1548 struct drm_plane_state *plane_state =
1549 drm_atomic_get_plane_state(state, plane);
1550
1551 if (IS_ERR(ptr: plane_state))
1552 return PTR_ERR(ptr: plane_state);
1553 }
1554 return 0;
1555}
1556EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1557
1558/**
1559 * drm_atomic_add_affected_colorops - add colorops for plane
1560 * @state: atomic state
1561 * @plane: DRM plane
1562 *
1563 * This function walks the current configuration and adds all colorops
1564 * currently used by @plane to the atomic configuration @state. This is useful
1565 * when an atomic commit also needs to check all currently enabled colorop on
1566 * @plane, e.g. when changing the mode. It's also useful when re-enabling a plane
1567 * to avoid special code to force-enable all colorops.
1568 *
1569 * Since acquiring a colorop state will always also acquire the w/w mutex of the
1570 * current plane for that colorop (if there is any) adding all the colorop states for
1571 * a plane will not reduce parallelism of atomic updates.
1572 *
1573 * Returns:
1574 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1575 * then the w/w mutex code has detected a deadlock and the entire atomic
1576 * sequence must be restarted. All other errors are fatal.
1577 */
1578int
1579drm_atomic_add_affected_colorops(struct drm_atomic_state *state,
1580 struct drm_plane *plane)
1581{
1582 struct drm_colorop *colorop;
1583 struct drm_colorop_state *colorop_state;
1584
1585 WARN_ON(!drm_atomic_get_new_plane_state(state, plane));
1586
1587 drm_dbg_atomic(plane->dev,
1588 "Adding all current colorops for [PLANE:%d:%s] to %p\n",
1589 plane->base.id, plane->name, state);
1590
1591 drm_for_each_colorop(colorop, plane->dev) {
1592 if (colorop->plane != plane)
1593 continue;
1594
1595 colorop_state = drm_atomic_get_colorop_state(state, colorop);
1596 if (IS_ERR(ptr: colorop_state))
1597 return PTR_ERR(ptr: colorop_state);
1598 }
1599
1600 return 0;
1601}
1602EXPORT_SYMBOL(drm_atomic_add_affected_colorops);
1603
1604/**
1605 * drm_atomic_check_only - check whether a given config would work
1606 * @state: atomic configuration to check
1607 *
1608 * Note that this function can return -EDEADLK if the driver needed to acquire
1609 * more locks but encountered a deadlock. The caller must then do the usual w/w
1610 * backoff dance and restart. All other errors are fatal.
1611 *
1612 * Returns:
1613 * 0 on success, negative error code on failure.
1614 */
1615int drm_atomic_check_only(struct drm_atomic_state *state)
1616{
1617 struct drm_device *dev = state->dev;
1618 struct drm_mode_config *config = &dev->mode_config;
1619 struct drm_plane *plane;
1620 struct drm_plane_state *old_plane_state;
1621 struct drm_plane_state *new_plane_state;
1622 struct drm_crtc *crtc;
1623 struct drm_crtc_state *old_crtc_state;
1624 struct drm_crtc_state *new_crtc_state;
1625 struct drm_connector *conn;
1626 struct drm_connector_state *conn_state;
1627 unsigned int requested_crtc = 0;
1628 unsigned int affected_crtc = 0;
1629 int i, ret = 0;
1630
1631 drm_dbg_atomic(dev, "checking %p\n", state);
1632
1633 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1634 if (new_crtc_state->enable)
1635 requested_crtc |= drm_crtc_mask(crtc);
1636 }
1637
1638 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1639 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1640 if (ret) {
1641 drm_dbg_atomic(dev, "[PLANE:%d:%s] atomic core check failed\n",
1642 plane->base.id, plane->name);
1643 return ret;
1644 }
1645 }
1646
1647 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1648 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1649 if (ret) {
1650 drm_dbg_atomic(dev, "[CRTC:%d:%s] atomic core check failed\n",
1651 crtc->base.id, crtc->name);
1652 return ret;
1653 }
1654 }
1655
1656 for_each_new_connector_in_state(state, conn, conn_state, i) {
1657 ret = drm_atomic_connector_check(connector: conn, state: conn_state);
1658 if (ret) {
1659 drm_dbg_atomic(dev, "[CONNECTOR:%d:%s] atomic core check failed\n",
1660 conn->base.id, conn->name);
1661 return ret;
1662 }
1663 }
1664
1665 if (config->funcs->atomic_check) {
1666 ret = config->funcs->atomic_check(state->dev, state);
1667
1668 if (ret) {
1669 drm_dbg_atomic(dev, "atomic driver check for %p failed: %d\n",
1670 state, ret);
1671 return ret;
1672 }
1673 }
1674
1675 if (!state->allow_modeset) {
1676 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1677 if (drm_atomic_crtc_needs_modeset(state: new_crtc_state)) {
1678 drm_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n",
1679 crtc->base.id, crtc->name);
1680 return -EINVAL;
1681 }
1682 }
1683 }
1684
1685 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1686 if (new_crtc_state->enable)
1687 affected_crtc |= drm_crtc_mask(crtc);
1688 }
1689
1690 /*
1691 * For commits that allow modesets drivers can add other CRTCs to the
1692 * atomic commit, e.g. when they need to reallocate global resources.
1693 * This can cause spurious EBUSY, which robs compositors of a very
1694 * effective sanity check for their drawing loop. Therefor only allow
1695 * drivers to add unrelated CRTC states for modeset commits.
1696 *
1697 * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output
1698 * so compositors know what's going on.
1699 */
1700 if (affected_crtc != requested_crtc) {
1701 drm_dbg_atomic(dev,
1702 "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n",
1703 requested_crtc, affected_crtc);
1704 WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n",
1705 requested_crtc, affected_crtc);
1706 }
1707
1708 state->checked = true;
1709
1710 return 0;
1711}
1712EXPORT_SYMBOL(drm_atomic_check_only);
1713
1714/**
1715 * drm_atomic_commit - commit configuration atomically
1716 * @state: atomic configuration to check
1717 *
1718 * Note that this function can return -EDEADLK if the driver needed to acquire
1719 * more locks but encountered a deadlock. The caller must then do the usual w/w
1720 * backoff dance and restart. All other errors are fatal.
1721 *
1722 * This function will take its own reference on @state.
1723 * Callers should always release their reference with drm_atomic_state_put().
1724 *
1725 * Returns:
1726 * 0 on success, negative error code on failure.
1727 */
1728int drm_atomic_commit(struct drm_atomic_state *state)
1729{
1730 struct drm_mode_config *config = &state->dev->mode_config;
1731 struct drm_printer p = drm_info_printer(dev: state->dev->dev);
1732 int ret;
1733
1734 if (drm_debug_enabled(DRM_UT_STATE))
1735 drm_atomic_print_new_state(state, p: &p);
1736
1737 ret = drm_atomic_check_only(state);
1738 if (ret)
1739 return ret;
1740
1741 drm_dbg_atomic(state->dev, "committing %p\n", state);
1742
1743 return config->funcs->atomic_commit(state->dev, state, false);
1744}
1745EXPORT_SYMBOL(drm_atomic_commit);
1746
1747/**
1748 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1749 * @state: atomic configuration to check
1750 *
1751 * Note that this function can return -EDEADLK if the driver needed to acquire
1752 * more locks but encountered a deadlock. The caller must then do the usual w/w
1753 * backoff dance and restart. All other errors are fatal.
1754 *
1755 * This function will take its own reference on @state.
1756 * Callers should always release their reference with drm_atomic_state_put().
1757 *
1758 * Returns:
1759 * 0 on success, negative error code on failure.
1760 */
1761int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1762{
1763 struct drm_mode_config *config = &state->dev->mode_config;
1764 int ret;
1765
1766 ret = drm_atomic_check_only(state);
1767 if (ret)
1768 return ret;
1769
1770 drm_dbg_atomic(state->dev, "committing %p nonblocking\n", state);
1771
1772 return config->funcs->atomic_commit(state->dev, state, true);
1773}
1774EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1775
1776/* just used from drm-client and atomic-helper: */
1777int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1778 struct drm_plane_state *plane_state)
1779{
1780 int ret;
1781
1782 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1783 if (ret != 0)
1784 return ret;
1785
1786 drm_atomic_set_fb_for_plane(plane_state, NULL);
1787 plane_state->crtc_x = 0;
1788 plane_state->crtc_y = 0;
1789 plane_state->crtc_w = 0;
1790 plane_state->crtc_h = 0;
1791 plane_state->src_x = 0;
1792 plane_state->src_y = 0;
1793 plane_state->src_w = 0;
1794 plane_state->src_h = 0;
1795
1796 return 0;
1797}
1798EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1799
1800static int update_output_state(struct drm_atomic_state *state,
1801 struct drm_mode_set *set)
1802{
1803 struct drm_device *dev = set->crtc->dev;
1804 struct drm_crtc *crtc;
1805 struct drm_crtc_state *new_crtc_state;
1806 struct drm_connector *connector;
1807 struct drm_connector_state *new_conn_state;
1808 int ret, i;
1809
1810 ret = drm_modeset_lock(lock: &dev->mode_config.connection_mutex,
1811 ctx: state->acquire_ctx);
1812 if (ret)
1813 return ret;
1814
1815 /* First disable all connectors on the target crtc. */
1816 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1817 if (ret)
1818 return ret;
1819
1820 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1821 if (new_conn_state->crtc == set->crtc) {
1822 ret = drm_atomic_set_crtc_for_connector(conn_state: new_conn_state,
1823 NULL);
1824 if (ret)
1825 return ret;
1826
1827 /* Make sure legacy setCrtc always re-trains */
1828 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1829 }
1830 }
1831
1832 /* Then set all connectors from set->connectors on the target crtc */
1833 for (i = 0; i < set->num_connectors; i++) {
1834 new_conn_state = drm_atomic_get_connector_state(state,
1835 set->connectors[i]);
1836 if (IS_ERR(ptr: new_conn_state))
1837 return PTR_ERR(ptr: new_conn_state);
1838
1839 ret = drm_atomic_set_crtc_for_connector(conn_state: new_conn_state,
1840 crtc: set->crtc);
1841 if (ret)
1842 return ret;
1843 }
1844
1845 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1846 /*
1847 * Don't update ->enable for the CRTC in the set_config request,
1848 * since a mismatch would indicate a bug in the upper layers.
1849 * The actual modeset code later on will catch any
1850 * inconsistencies here.
1851 */
1852 if (crtc == set->crtc)
1853 continue;
1854
1855 if (!new_crtc_state->connector_mask) {
1856 ret = drm_atomic_set_mode_prop_for_crtc(state: new_crtc_state,
1857 NULL);
1858 if (ret < 0)
1859 return ret;
1860
1861 new_crtc_state->active = false;
1862 }
1863 }
1864
1865 return 0;
1866}
1867
1868/* just used from drm-client and atomic-helper: */
1869int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1870 struct drm_atomic_state *state)
1871{
1872 struct drm_crtc_state *crtc_state;
1873 struct drm_plane_state *primary_state;
1874 struct drm_crtc *crtc = set->crtc;
1875 int hdisplay, vdisplay;
1876 int ret;
1877
1878 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1879 if (IS_ERR(ptr: crtc_state))
1880 return PTR_ERR(ptr: crtc_state);
1881
1882 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1883 if (IS_ERR(ptr: primary_state))
1884 return PTR_ERR(ptr: primary_state);
1885
1886 if (!set->mode) {
1887 WARN_ON(set->fb);
1888 WARN_ON(set->num_connectors);
1889
1890 ret = drm_atomic_set_mode_for_crtc(state: crtc_state, NULL);
1891 if (ret != 0)
1892 return ret;
1893
1894 crtc_state->active = false;
1895
1896 ret = drm_atomic_set_crtc_for_plane(plane_state: primary_state, NULL);
1897 if (ret != 0)
1898 return ret;
1899
1900 drm_atomic_set_fb_for_plane(plane_state: primary_state, NULL);
1901
1902 goto commit;
1903 }
1904
1905 WARN_ON(!set->fb);
1906 WARN_ON(!set->num_connectors);
1907
1908 ret = drm_atomic_set_mode_for_crtc(state: crtc_state, mode: set->mode);
1909 if (ret != 0)
1910 return ret;
1911
1912 crtc_state->active = true;
1913
1914 ret = drm_atomic_set_crtc_for_plane(plane_state: primary_state, crtc);
1915 if (ret != 0)
1916 return ret;
1917
1918 drm_mode_get_hv_timing(mode: set->mode, hdisplay: &hdisplay, vdisplay: &vdisplay);
1919
1920 drm_atomic_set_fb_for_plane(plane_state: primary_state, fb: set->fb);
1921 primary_state->crtc_x = 0;
1922 primary_state->crtc_y = 0;
1923 primary_state->crtc_w = hdisplay;
1924 primary_state->crtc_h = vdisplay;
1925 primary_state->src_x = set->x << 16;
1926 primary_state->src_y = set->y << 16;
1927 if (drm_rotation_90_or_270(rotation: primary_state->rotation)) {
1928 primary_state->src_w = vdisplay << 16;
1929 primary_state->src_h = hdisplay << 16;
1930 } else {
1931 primary_state->src_w = hdisplay << 16;
1932 primary_state->src_h = vdisplay << 16;
1933 }
1934
1935commit:
1936 ret = update_output_state(state, set);
1937 if (ret)
1938 return ret;
1939
1940 return 0;
1941}
1942EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1943
1944static void drm_atomic_private_obj_print_state(struct drm_printer *p,
1945 const struct drm_private_state *state)
1946{
1947 struct drm_private_obj *obj = state->obj;
1948
1949 if (obj->funcs->atomic_print_state)
1950 obj->funcs->atomic_print_state(p, state);
1951}
1952
1953/**
1954 * drm_atomic_print_new_state - prints drm atomic state
1955 * @state: atomic configuration to check
1956 * @p: drm printer
1957 *
1958 * This functions prints the drm atomic state snapshot using the drm printer
1959 * which is passed to it. This snapshot can be used for debugging purposes.
1960 *
1961 * Note that this function looks into the new state objects and hence its not
1962 * safe to be used after the call to drm_atomic_helper_commit_hw_done().
1963 */
1964void drm_atomic_print_new_state(const struct drm_atomic_state *state,
1965 struct drm_printer *p)
1966{
1967 struct drm_plane *plane;
1968 struct drm_plane_state *plane_state;
1969 struct drm_crtc *crtc;
1970 struct drm_crtc_state *crtc_state;
1971 struct drm_connector *connector;
1972 struct drm_connector_state *connector_state;
1973 struct drm_private_obj *obj;
1974 struct drm_private_state *obj_state;
1975 int i;
1976
1977 if (!p) {
1978 drm_err(state->dev, "invalid drm printer\n");
1979 return;
1980 }
1981
1982 drm_dbg_atomic(state->dev, "checking %p\n", state);
1983
1984 for_each_new_plane_in_state(state, plane, plane_state, i)
1985 drm_atomic_plane_print_state(p, state: plane_state);
1986
1987 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1988 drm_atomic_crtc_print_state(p, state: crtc_state);
1989
1990 for_each_new_connector_in_state(state, connector, connector_state, i)
1991 drm_atomic_connector_print_state(p, state: connector_state);
1992
1993 for_each_new_private_obj_in_state(state, obj, obj_state, i)
1994 drm_atomic_private_obj_print_state(p, state: obj_state);
1995}
1996EXPORT_SYMBOL(drm_atomic_print_new_state);
1997
1998static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1999 bool take_locks)
2000{
2001 struct drm_mode_config *config = &dev->mode_config;
2002 struct drm_colorop *colorop;
2003 struct drm_plane *plane;
2004 struct drm_crtc *crtc;
2005 struct drm_connector *connector;
2006 struct drm_connector_list_iter conn_iter;
2007 struct drm_private_obj *obj;
2008
2009 if (!drm_drv_uses_atomic_modeset(dev))
2010 return;
2011
2012 list_for_each_entry(colorop, &config->colorop_list, head) {
2013 if (take_locks)
2014 drm_modeset_lock(lock: &colorop->plane->mutex, NULL);
2015 drm_atomic_colorop_print_state(p, state: colorop->state);
2016 if (take_locks)
2017 drm_modeset_unlock(lock: &colorop->plane->mutex);
2018 }
2019
2020 list_for_each_entry(plane, &config->plane_list, head) {
2021 if (take_locks)
2022 drm_modeset_lock(lock: &plane->mutex, NULL);
2023 drm_atomic_plane_print_state(p, state: plane->state);
2024 if (take_locks)
2025 drm_modeset_unlock(lock: &plane->mutex);
2026 }
2027
2028 list_for_each_entry(crtc, &config->crtc_list, head) {
2029 if (take_locks)
2030 drm_modeset_lock(lock: &crtc->mutex, NULL);
2031 drm_atomic_crtc_print_state(p, state: crtc->state);
2032 if (take_locks)
2033 drm_modeset_unlock(lock: &crtc->mutex);
2034 }
2035
2036 drm_connector_list_iter_begin(dev, iter: &conn_iter);
2037 if (take_locks)
2038 drm_modeset_lock(lock: &dev->mode_config.connection_mutex, NULL);
2039 drm_for_each_connector_iter(connector, &conn_iter)
2040 drm_atomic_connector_print_state(p, state: connector->state);
2041 if (take_locks)
2042 drm_modeset_unlock(lock: &dev->mode_config.connection_mutex);
2043 drm_connector_list_iter_end(iter: &conn_iter);
2044
2045 list_for_each_entry(obj, &config->privobj_list, head) {
2046 if (take_locks)
2047 drm_modeset_lock(lock: &obj->lock, NULL);
2048 drm_atomic_private_obj_print_state(p, state: obj->state);
2049 if (take_locks)
2050 drm_modeset_unlock(lock: &obj->lock);
2051 }
2052}
2053
2054/**
2055 * drm_state_dump - dump entire device atomic state
2056 * @dev: the drm device
2057 * @p: where to print the state to
2058 *
2059 * Just for debugging. Drivers might want an option to dump state
2060 * to dmesg in case of error irq's. (Hint, you probably want to
2061 * ratelimit this!)
2062 *
2063 * The caller must wrap this drm_modeset_lock_all_ctx() and
2064 * drm_modeset_drop_locks(). If this is called from error irq handler, it should
2065 * not be enabled by default - if you are debugging errors you might
2066 * not care that this is racey, but calling this without all modeset locks held
2067 * is inherently unsafe.
2068 */
2069void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
2070{
2071 __drm_state_dump(dev, p, take_locks: false);
2072}
2073EXPORT_SYMBOL(drm_state_dump);
2074
2075#ifdef CONFIG_DEBUG_FS
2076static int drm_state_info(struct seq_file *m, void *data)
2077{
2078 struct drm_debugfs_entry *entry = m->private;
2079 struct drm_device *dev = entry->dev;
2080 struct drm_printer p = drm_seq_file_printer(f: m);
2081
2082 __drm_state_dump(dev, p: &p, take_locks: true);
2083
2084 return 0;
2085}
2086
2087/* any use in debugfs files to dump individual planes/crtc/etc? */
2088static const struct drm_debugfs_info drm_atomic_debugfs_list[] = {
2089 {"state", drm_state_info, 0},
2090};
2091
2092void drm_atomic_debugfs_init(struct drm_device *dev)
2093{
2094 drm_debugfs_add_files(dev, files: drm_atomic_debugfs_list,
2095 ARRAY_SIZE(drm_atomic_debugfs_list));
2096}
2097#endif
2098

source code of linux/drivers/gpu/drm/drm_atomic.c