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1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28
29#include <linux/sync_file.h>
30
31#include <drm/drm_atomic.h>
32#include <drm/drm_atomic_uapi.h>
33#include <drm/drm_bridge.h>
34#include <drm/drm_debugfs.h>
35#include <drm/drm_device.h>
36#include <drm/drm_drv.h>
37#include <drm/drm_file.h>
38#include <drm/drm_fourcc.h>
39#include <drm/drm_mode.h>
40#include <drm/drm_print.h>
41#include <drm/drm_writeback.h>
42
43#include "drm_crtc_internal.h"
44#include "drm_internal.h"
45
46void __drm_crtc_commit_free(struct kref *kref)
47{
48 struct drm_crtc_commit *commit =
49 container_of(kref, struct drm_crtc_commit, ref);
50
51 kfree(commit);
52}
53EXPORT_SYMBOL(__drm_crtc_commit_free);
54
55/**
56 * drm_atomic_state_default_release -
57 * release memory initialized by drm_atomic_state_init
58 * @state: atomic state
59 *
60 * Free all the memory allocated by drm_atomic_state_init.
61 * This should only be used by drivers which are still subclassing
62 * &drm_atomic_state and haven't switched to &drm_private_state yet.
63 */
64void drm_atomic_state_default_release(struct drm_atomic_state *state)
65{
66 kfree(state->connectors);
67 kfree(state->crtcs);
68 kfree(state->planes);
69 kfree(state->private_objs);
70}
71EXPORT_SYMBOL(drm_atomic_state_default_release);
72
73/**
74 * drm_atomic_state_init - init new atomic state
75 * @dev: DRM device
76 * @state: atomic state
77 *
78 * Default implementation for filling in a new atomic state.
79 * This should only be used by drivers which are still subclassing
80 * &drm_atomic_state and haven't switched to &drm_private_state yet.
81 */
82int
83drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
84{
85 kref_init(&state->ref);
86
87 /* TODO legacy paths should maybe do a better job about
88 * setting this appropriately?
89 */
90 state->allow_modeset = true;
91
92 state->crtcs = kcalloc(dev->mode_config.num_crtc,
93 sizeof(*state->crtcs), GFP_KERNEL);
94 if (!state->crtcs)
95 goto fail;
96 state->planes = kcalloc(dev->mode_config.num_total_plane,
97 sizeof(*state->planes), GFP_KERNEL);
98 if (!state->planes)
99 goto fail;
100
101 state->dev = dev;
102
103 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
104
105 return 0;
106fail:
107 drm_atomic_state_default_release(state);
108 return -ENOMEM;
109}
110EXPORT_SYMBOL(drm_atomic_state_init);
111
112/**
113 * drm_atomic_state_alloc - allocate atomic state
114 * @dev: DRM device
115 *
116 * This allocates an empty atomic state to track updates.
117 */
118struct drm_atomic_state *
119drm_atomic_state_alloc(struct drm_device *dev)
120{
121 struct drm_mode_config *config = &dev->mode_config;
122
123 if (!config->funcs->atomic_state_alloc) {
124 struct drm_atomic_state *state;
125
126 state = kzalloc(sizeof(*state), GFP_KERNEL);
127 if (!state)
128 return NULL;
129 if (drm_atomic_state_init(dev, state) < 0) {
130 kfree(state);
131 return NULL;
132 }
133 return state;
134 }
135
136 return config->funcs->atomic_state_alloc(dev);
137}
138EXPORT_SYMBOL(drm_atomic_state_alloc);
139
140/**
141 * drm_atomic_state_default_clear - clear base atomic state
142 * @state: atomic state
143 *
144 * Default implementation for clearing atomic state.
145 * This should only be used by drivers which are still subclassing
146 * &drm_atomic_state and haven't switched to &drm_private_state yet.
147 */
148void drm_atomic_state_default_clear(struct drm_atomic_state *state)
149{
150 struct drm_device *dev = state->dev;
151 struct drm_mode_config *config = &dev->mode_config;
152 int i;
153
154 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
155
156 for (i = 0; i < state->num_connector; i++) {
157 struct drm_connector *connector = state->connectors[i].ptr;
158
159 if (!connector)
160 continue;
161
162 connector->funcs->atomic_destroy_state(connector,
163 state->connectors[i].state);
164 state->connectors[i].ptr = NULL;
165 state->connectors[i].state = NULL;
166 state->connectors[i].old_state = NULL;
167 state->connectors[i].new_state = NULL;
168 drm_connector_put(connector);
169 }
170
171 for (i = 0; i < config->num_crtc; i++) {
172 struct drm_crtc *crtc = state->crtcs[i].ptr;
173
174 if (!crtc)
175 continue;
176
177 crtc->funcs->atomic_destroy_state(crtc,
178 state->crtcs[i].state);
179
180 state->crtcs[i].ptr = NULL;
181 state->crtcs[i].state = NULL;
182 state->crtcs[i].old_state = NULL;
183 state->crtcs[i].new_state = NULL;
184
185 if (state->crtcs[i].commit) {
186 drm_crtc_commit_put(state->crtcs[i].commit);
187 state->crtcs[i].commit = NULL;
188 }
189 }
190
191 for (i = 0; i < config->num_total_plane; i++) {
192 struct drm_plane *plane = state->planes[i].ptr;
193
194 if (!plane)
195 continue;
196
197 plane->funcs->atomic_destroy_state(plane,
198 state->planes[i].state);
199 state->planes[i].ptr = NULL;
200 state->planes[i].state = NULL;
201 state->planes[i].old_state = NULL;
202 state->planes[i].new_state = NULL;
203 }
204
205 for (i = 0; i < state->num_private_objs; i++) {
206 struct drm_private_obj *obj = state->private_objs[i].ptr;
207
208 obj->funcs->atomic_destroy_state(obj,
209 state->private_objs[i].state);
210 state->private_objs[i].ptr = NULL;
211 state->private_objs[i].state = NULL;
212 state->private_objs[i].old_state = NULL;
213 state->private_objs[i].new_state = NULL;
214 }
215 state->num_private_objs = 0;
216
217 if (state->fake_commit) {
218 drm_crtc_commit_put(state->fake_commit);
219 state->fake_commit = NULL;
220 }
221}
222EXPORT_SYMBOL(drm_atomic_state_default_clear);
223
224/**
225 * drm_atomic_state_clear - clear state object
226 * @state: atomic state
227 *
228 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
229 * all locks. So someone else could sneak in and change the current modeset
230 * configuration. Which means that all the state assembled in @state is no
231 * longer an atomic update to the current state, but to some arbitrary earlier
232 * state. Which could break assumptions the driver's
233 * &drm_mode_config_funcs.atomic_check likely relies on.
234 *
235 * Hence we must clear all cached state and completely start over, using this
236 * function.
237 */
238void drm_atomic_state_clear(struct drm_atomic_state *state)
239{
240 struct drm_device *dev = state->dev;
241 struct drm_mode_config *config = &dev->mode_config;
242
243 if (config->funcs->atomic_state_clear)
244 config->funcs->atomic_state_clear(state);
245 else
246 drm_atomic_state_default_clear(state);
247}
248EXPORT_SYMBOL(drm_atomic_state_clear);
249
250/**
251 * __drm_atomic_state_free - free all memory for an atomic state
252 * @ref: This atomic state to deallocate
253 *
254 * This frees all memory associated with an atomic state, including all the
255 * per-object state for planes, CRTCs and connectors.
256 */
257void __drm_atomic_state_free(struct kref *ref)
258{
259 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
260 struct drm_mode_config *config = &state->dev->mode_config;
261
262 drm_atomic_state_clear(state);
263
264 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
265
266 if (config->funcs->atomic_state_free) {
267 config->funcs->atomic_state_free(state);
268 } else {
269 drm_atomic_state_default_release(state);
270 kfree(state);
271 }
272}
273EXPORT_SYMBOL(__drm_atomic_state_free);
274
275/**
276 * drm_atomic_get_crtc_state - get CRTC state
277 * @state: global atomic state object
278 * @crtc: CRTC to get state object for
279 *
280 * This function returns the CRTC state for the given CRTC, allocating it if
281 * needed. It will also grab the relevant CRTC lock to make sure that the state
282 * is consistent.
283 *
284 * Returns:
285 *
286 * Either the allocated state or the error code encoded into the pointer. When
287 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
288 * entire atomic sequence must be restarted. All other errors are fatal.
289 */
290struct drm_crtc_state *
291drm_atomic_get_crtc_state(struct drm_atomic_state *state,
292 struct drm_crtc *crtc)
293{
294 int ret, index = drm_crtc_index(crtc);
295 struct drm_crtc_state *crtc_state;
296
297 WARN_ON(!state->acquire_ctx);
298
299 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
300 if (crtc_state)
301 return crtc_state;
302
303 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
304 if (ret)
305 return ERR_PTR(ret);
306
307 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
308 if (!crtc_state)
309 return ERR_PTR(-ENOMEM);
310
311 state->crtcs[index].state = crtc_state;
312 state->crtcs[index].old_state = crtc->state;
313 state->crtcs[index].new_state = crtc_state;
314 state->crtcs[index].ptr = crtc;
315 crtc_state->state = state;
316
317 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
318 crtc->base.id, crtc->name, crtc_state, state);
319
320 return crtc_state;
321}
322EXPORT_SYMBOL(drm_atomic_get_crtc_state);
323
324static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
325 const struct drm_crtc_state *new_crtc_state)
326{
327 struct drm_crtc *crtc = new_crtc_state->crtc;
328
329 /* NOTE: we explicitly don't enforce constraints such as primary
330 * layer covering entire screen, since that is something we want
331 * to allow (on hw that supports it). For hw that does not, it
332 * should be checked in driver's crtc->atomic_check() vfunc.
333 *
334 * TODO: Add generic modeset state checks once we support those.
335 */
336
337 if (new_crtc_state->active && !new_crtc_state->enable) {
338 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
339 crtc->base.id, crtc->name);
340 return -EINVAL;
341 }
342
343 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
344 * as this is a kernel-internal detail that userspace should never
345 * be able to trigger. */
346 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
347 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
348 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
349 crtc->base.id, crtc->name);
350 return -EINVAL;
351 }
352
353 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
354 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
355 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
356 crtc->base.id, crtc->name);
357 return -EINVAL;
358 }
359
360 /*
361 * Reject event generation for when a CRTC is off and stays off.
362 * It wouldn't be hard to implement this, but userspace has a track
363 * record of happily burning through 100% cpu (or worse, crash) when the
364 * display pipe is suspended. To avoid all that fun just reject updates
365 * that ask for events since likely that indicates a bug in the
366 * compositor's drawing loop. This is consistent with the vblank IOCTL
367 * and legacy page_flip IOCTL which also reject service on a disabled
368 * pipe.
369 */
370 if (new_crtc_state->event &&
371 !new_crtc_state->active && !old_crtc_state->active) {
372 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
373 crtc->base.id, crtc->name);
374 return -EINVAL;
375 }
376
377 return 0;
378}
379
380static void drm_atomic_crtc_print_state(struct drm_printer *p,
381 const struct drm_crtc_state *state)
382{
383 struct drm_crtc *crtc = state->crtc;
384
385 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
386 drm_printf(p, "\tenable=%d\n", state->enable);
387 drm_printf(p, "\tactive=%d\n", state->active);
388 drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
389 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
390 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
391 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
392 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
393 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
394 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
395 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
396 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
397 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
398
399 if (crtc->funcs->atomic_print_state)
400 crtc->funcs->atomic_print_state(p, state);
401}
402
403static int drm_atomic_connector_check(struct drm_connector *connector,
404 struct drm_connector_state *state)
405{
406 struct drm_crtc_state *crtc_state;
407 struct drm_writeback_job *writeback_job = state->writeback_job;
408 const struct drm_display_info *info = &connector->display_info;
409
410 state->max_bpc = info->bpc ? info->bpc : 8;
411 if (connector->max_bpc_property)
412 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
413
414 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
415 return 0;
416
417 if (writeback_job->fb && !state->crtc) {
418 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n",
419 connector->base.id, connector->name);
420 return -EINVAL;
421 }
422
423 if (state->crtc)
424 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
425 state->crtc);
426
427 if (writeback_job->fb && !crtc_state->active) {
428 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
429 connector->base.id, connector->name,
430 state->crtc->base.id);
431 return -EINVAL;
432 }
433
434 if (!writeback_job->fb) {
435 if (writeback_job->out_fence) {
436 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
437 connector->base.id, connector->name);
438 return -EINVAL;
439 }
440
441 drm_writeback_cleanup_job(writeback_job);
442 state->writeback_job = NULL;
443 }
444
445 return 0;
446}
447
448/**
449 * drm_atomic_get_plane_state - get plane state
450 * @state: global atomic state object
451 * @plane: plane to get state object for
452 *
453 * This function returns the plane state for the given plane, allocating it if
454 * needed. It will also grab the relevant plane lock to make sure that the state
455 * is consistent.
456 *
457 * Returns:
458 *
459 * Either the allocated state or the error code encoded into the pointer. When
460 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
461 * entire atomic sequence must be restarted. All other errors are fatal.
462 */
463struct drm_plane_state *
464drm_atomic_get_plane_state(struct drm_atomic_state *state,
465 struct drm_plane *plane)
466{
467 int ret, index = drm_plane_index(plane);
468 struct drm_plane_state *plane_state;
469
470 WARN_ON(!state->acquire_ctx);
471
472 /* the legacy pointers should never be set */
473 WARN_ON(plane->fb);
474 WARN_ON(plane->old_fb);
475 WARN_ON(plane->crtc);
476
477 plane_state = drm_atomic_get_existing_plane_state(state, plane);
478 if (plane_state)
479 return plane_state;
480
481 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
482 if (ret)
483 return ERR_PTR(ret);
484
485 plane_state = plane->funcs->atomic_duplicate_state(plane);
486 if (!plane_state)
487 return ERR_PTR(-ENOMEM);
488
489 state->planes[index].state = plane_state;
490 state->planes[index].ptr = plane;
491 state->planes[index].old_state = plane->state;
492 state->planes[index].new_state = plane_state;
493 plane_state->state = state;
494
495 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
496 plane->base.id, plane->name, plane_state, state);
497
498 if (plane_state->crtc) {
499 struct drm_crtc_state *crtc_state;
500
501 crtc_state = drm_atomic_get_crtc_state(state,
502 plane_state->crtc);
503 if (IS_ERR(crtc_state))
504 return ERR_CAST(crtc_state);
505 }
506
507 return plane_state;
508}
509EXPORT_SYMBOL(drm_atomic_get_plane_state);
510
511static bool
512plane_switching_crtc(const struct drm_plane_state *old_plane_state,
513 const struct drm_plane_state *new_plane_state)
514{
515 if (!old_plane_state->crtc || !new_plane_state->crtc)
516 return false;
517
518 if (old_plane_state->crtc == new_plane_state->crtc)
519 return false;
520
521 /* This could be refined, but currently there's no helper or driver code
522 * to implement direct switching of active planes nor userspace to take
523 * advantage of more direct plane switching without the intermediate
524 * full OFF state.
525 */
526 return true;
527}
528
529/**
530 * drm_atomic_plane_check - check plane state
531 * @old_plane_state: old plane state to check
532 * @new_plane_state: new plane state to check
533 *
534 * Provides core sanity checks for plane state.
535 *
536 * RETURNS:
537 * Zero on success, error code on failure
538 */
539static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
540 const struct drm_plane_state *new_plane_state)
541{
542 struct drm_plane *plane = new_plane_state->plane;
543 struct drm_crtc *crtc = new_plane_state->crtc;
544 const struct drm_framebuffer *fb = new_plane_state->fb;
545 unsigned int fb_width, fb_height;
546 struct drm_mode_rect *clips;
547 uint32_t num_clips;
548 int ret;
549
550 /* either *both* CRTC and FB must be set, or neither */
551 if (crtc && !fb) {
552 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
553 plane->base.id, plane->name);
554 return -EINVAL;
555 } else if (fb && !crtc) {
556 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
557 plane->base.id, plane->name);
558 return -EINVAL;
559 }
560
561 /* if disabled, we don't care about the rest of the state: */
562 if (!crtc)
563 return 0;
564
565 /* Check whether this plane is usable on this CRTC */
566 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
567 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
568 crtc->base.id, crtc->name,
569 plane->base.id, plane->name);
570 return -EINVAL;
571 }
572
573 /* Check whether this plane supports the fb pixel format. */
574 ret = drm_plane_check_pixel_format(plane, fb->format->format,
575 fb->modifier);
576 if (ret) {
577 struct drm_format_name_buf format_name;
578
579 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
580 plane->base.id, plane->name,
581 drm_get_format_name(fb->format->format,
582 &format_name),
583 fb->modifier);
584 return ret;
585 }
586
587 /* Give drivers some help against integer overflows */
588 if (new_plane_state->crtc_w > INT_MAX ||
589 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
590 new_plane_state->crtc_h > INT_MAX ||
591 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
592 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
593 plane->base.id, plane->name,
594 new_plane_state->crtc_w, new_plane_state->crtc_h,
595 new_plane_state->crtc_x, new_plane_state->crtc_y);
596 return -ERANGE;
597 }
598
599 fb_width = fb->width << 16;
600 fb_height = fb->height << 16;
601
602 /* Make sure source coordinates are inside the fb. */
603 if (new_plane_state->src_w > fb_width ||
604 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
605 new_plane_state->src_h > fb_height ||
606 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
607 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
608 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
609 plane->base.id, plane->name,
610 new_plane_state->src_w >> 16,
611 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
612 new_plane_state->src_h >> 16,
613 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
614 new_plane_state->src_x >> 16,
615 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
616 new_plane_state->src_y >> 16,
617 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
618 fb->width, fb->height);
619 return -ENOSPC;
620 }
621
622 clips = drm_plane_get_damage_clips(new_plane_state);
623 num_clips = drm_plane_get_damage_clips_count(new_plane_state);
624
625 /* Make sure damage clips are valid and inside the fb. */
626 while (num_clips > 0) {
627 if (clips->x1 >= clips->x2 ||
628 clips->y1 >= clips->y2 ||
629 clips->x1 < 0 ||
630 clips->y1 < 0 ||
631 clips->x2 > fb_width ||
632 clips->y2 > fb_height) {
633 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
634 plane->base.id, plane->name, clips->x1,
635 clips->y1, clips->x2, clips->y2);
636 return -EINVAL;
637 }
638 clips++;
639 num_clips--;
640 }
641
642 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
643 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
644 plane->base.id, plane->name);
645 return -EINVAL;
646 }
647
648 return 0;
649}
650
651static void drm_atomic_plane_print_state(struct drm_printer *p,
652 const struct drm_plane_state *state)
653{
654 struct drm_plane *plane = state->plane;
655 struct drm_rect src = drm_plane_state_src(state);
656 struct drm_rect dest = drm_plane_state_dest(state);
657
658 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
659 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
660 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
661 if (state->fb)
662 drm_framebuffer_print_info(p, 2, state->fb);
663 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
664 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
665 drm_printf(p, "\trotation=%x\n", state->rotation);
666 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
667 drm_printf(p, "\tcolor-encoding=%s\n",
668 drm_get_color_encoding_name(state->color_encoding));
669 drm_printf(p, "\tcolor-range=%s\n",
670 drm_get_color_range_name(state->color_range));
671
672 if (plane->funcs->atomic_print_state)
673 plane->funcs->atomic_print_state(p, state);
674}
675
676/**
677 * DOC: handling driver private state
678 *
679 * Very often the DRM objects exposed to userspace in the atomic modeset api
680 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
681 * underlying hardware. Especially for any kind of shared resources (e.g. shared
682 * clocks, scaler units, bandwidth and fifo limits shared among a group of
683 * planes or CRTCs, and so on) it makes sense to model these as independent
684 * objects. Drivers then need to do similar state tracking and commit ordering for
685 * such private (since not exposed to userpace) objects as the atomic core and
686 * helpers already provide for connectors, planes and CRTCs.
687 *
688 * To make this easier on drivers the atomic core provides some support to track
689 * driver private state objects using struct &drm_private_obj, with the
690 * associated state struct &drm_private_state.
691 *
692 * Similar to userspace-exposed objects, private state structures can be
693 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care
694 * of locking, hence drivers should not have a need to call drm_modeset_lock()
695 * directly. Sequence of the actual hardware state commit is not handled,
696 * drivers might need to keep track of struct drm_crtc_commit within subclassed
697 * structure of &drm_private_state as necessary, e.g. similar to
698 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
699 *
700 * All private state structures contained in a &drm_atomic_state update can be
701 * iterated using for_each_oldnew_private_obj_in_state(),
702 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
703 * Drivers are recommended to wrap these for each type of driver private state
704 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
705 * least if they want to iterate over all objects of a given type.
706 *
707 * An earlier way to handle driver private state was by subclassing struct
708 * &drm_atomic_state. But since that encourages non-standard ways to implement
709 * the check/commit split atomic requires (by using e.g. "check and rollback or
710 * commit instead" of "duplicate state, check, then either commit or release
711 * duplicated state) it is deprecated in favour of using &drm_private_state.
712 */
713
714/**
715 * drm_atomic_private_obj_init - initialize private object
716 * @dev: DRM device this object will be attached to
717 * @obj: private object
718 * @state: initial private object state
719 * @funcs: pointer to the struct of function pointers that identify the object
720 * type
721 *
722 * Initialize the private object, which can be embedded into any
723 * driver private object that needs its own atomic state.
724 */
725void
726drm_atomic_private_obj_init(struct drm_device *dev,
727 struct drm_private_obj *obj,
728 struct drm_private_state *state,
729 const struct drm_private_state_funcs *funcs)
730{
731 memset(obj, 0, sizeof(*obj));
732
733 drm_modeset_lock_init(&obj->lock);
734
735 obj->state = state;
736 obj->funcs = funcs;
737 list_add_tail(&obj->head, &dev->mode_config.privobj_list);
738}
739EXPORT_SYMBOL(drm_atomic_private_obj_init);
740
741/**
742 * drm_atomic_private_obj_fini - finalize private object
743 * @obj: private object
744 *
745 * Finalize the private object.
746 */
747void
748drm_atomic_private_obj_fini(struct drm_private_obj *obj)
749{
750 list_del(&obj->head);
751 obj->funcs->atomic_destroy_state(obj, obj->state);
752 drm_modeset_lock_fini(&obj->lock);
753}
754EXPORT_SYMBOL(drm_atomic_private_obj_fini);
755
756/**
757 * drm_atomic_get_private_obj_state - get private object state
758 * @state: global atomic state
759 * @obj: private object to get the state for
760 *
761 * This function returns the private object state for the given private object,
762 * allocating the state if needed. It will also grab the relevant private
763 * object lock to make sure that the state is consistent.
764 *
765 * RETURNS:
766 *
767 * Either the allocated state or the error code encoded into a pointer.
768 */
769struct drm_private_state *
770drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
771 struct drm_private_obj *obj)
772{
773 int index, num_objs, i, ret;
774 size_t size;
775 struct __drm_private_objs_state *arr;
776 struct drm_private_state *obj_state;
777
778 for (i = 0; i < state->num_private_objs; i++)
779 if (obj == state->private_objs[i].ptr)
780 return state->private_objs[i].state;
781
782 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
783 if (ret)
784 return ERR_PTR(ret);
785
786 num_objs = state->num_private_objs + 1;
787 size = sizeof(*state->private_objs) * num_objs;
788 arr = krealloc(state->private_objs, size, GFP_KERNEL);
789 if (!arr)
790 return ERR_PTR(-ENOMEM);
791
792 state->private_objs = arr;
793 index = state->num_private_objs;
794 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
795
796 obj_state = obj->funcs->atomic_duplicate_state(obj);
797 if (!obj_state)
798 return ERR_PTR(-ENOMEM);
799
800 state->private_objs[index].state = obj_state;
801 state->private_objs[index].old_state = obj->state;
802 state->private_objs[index].new_state = obj_state;
803 state->private_objs[index].ptr = obj;
804 obj_state->state = state;
805
806 state->num_private_objs = num_objs;
807
808 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
809 obj, obj_state, state);
810
811 return obj_state;
812}
813EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
814
815/**
816 * drm_atomic_get_old_private_obj_state
817 * @state: global atomic state object
818 * @obj: private_obj to grab
819 *
820 * This function returns the old private object state for the given private_obj,
821 * or NULL if the private_obj is not part of the global atomic state.
822 */
823struct drm_private_state *
824drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
825 struct drm_private_obj *obj)
826{
827 int i;
828
829 for (i = 0; i < state->num_private_objs; i++)
830 if (obj == state->private_objs[i].ptr)
831 return state->private_objs[i].old_state;
832
833 return NULL;
834}
835EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
836
837/**
838 * drm_atomic_get_new_private_obj_state
839 * @state: global atomic state object
840 * @obj: private_obj to grab
841 *
842 * This function returns the new private object state for the given private_obj,
843 * or NULL if the private_obj is not part of the global atomic state.
844 */
845struct drm_private_state *
846drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
847 struct drm_private_obj *obj)
848{
849 int i;
850
851 for (i = 0; i < state->num_private_objs; i++)
852 if (obj == state->private_objs[i].ptr)
853 return state->private_objs[i].new_state;
854
855 return NULL;
856}
857EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
858
859/**
860 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
861 * @state: Atomic state
862 * @encoder: The encoder to fetch the connector state for
863 *
864 * This function finds and returns the connector that was connected to @encoder
865 * as specified by the @state.
866 *
867 * If there is no connector in @state which previously had @encoder connected to
868 * it, this function will return NULL. While this may seem like an invalid use
869 * case, it is sometimes useful to differentiate commits which had no prior
870 * connectors attached to @encoder vs ones that did (and to inspect their
871 * state). This is especially true in enable hooks because the pipeline has
872 * changed.
873 *
874 * Returns: The old connector connected to @encoder, or NULL if the encoder is
875 * not connected.
876 */
877struct drm_connector *
878drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
879 struct drm_encoder *encoder)
880{
881 struct drm_connector_state *conn_state;
882 struct drm_connector *connector;
883 unsigned int i;
884
885 for_each_old_connector_in_state(state, connector, conn_state, i) {
886 if (conn_state->best_encoder == encoder)
887 return connector;
888 }
889
890 return NULL;
891}
892EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
893
894/**
895 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
896 * @state: Atomic state
897 * @encoder: The encoder to fetch the connector state for
898 *
899 * This function finds and returns the connector that will be connected to
900 * @encoder as specified by the @state.
901 *
902 * If there is no connector in @state which will have @encoder connected to it,
903 * this function will return NULL. While this may seem like an invalid use case,
904 * it is sometimes useful to differentiate commits which have no connectors
905 * attached to @encoder vs ones that do (and to inspect their state). This is
906 * especially true in disable hooks because the pipeline will change.
907 *
908 * Returns: The new connector connected to @encoder, or NULL if the encoder is
909 * not connected.
910 */
911struct drm_connector *
912drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
913 struct drm_encoder *encoder)
914{
915 struct drm_connector_state *conn_state;
916 struct drm_connector *connector;
917 unsigned int i;
918
919 for_each_new_connector_in_state(state, connector, conn_state, i) {
920 if (conn_state->best_encoder == encoder)
921 return connector;
922 }
923
924 return NULL;
925}
926EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
927
928/**
929 * drm_atomic_get_connector_state - get connector state
930 * @state: global atomic state object
931 * @connector: connector to get state object for
932 *
933 * This function returns the connector state for the given connector,
934 * allocating it if needed. It will also grab the relevant connector lock to
935 * make sure that the state is consistent.
936 *
937 * Returns:
938 *
939 * Either the allocated state or the error code encoded into the pointer. When
940 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
941 * entire atomic sequence must be restarted. All other errors are fatal.
942 */
943struct drm_connector_state *
944drm_atomic_get_connector_state(struct drm_atomic_state *state,
945 struct drm_connector *connector)
946{
947 int ret, index;
948 struct drm_mode_config *config = &connector->dev->mode_config;
949 struct drm_connector_state *connector_state;
950
951 WARN_ON(!state->acquire_ctx);
952
953 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
954 if (ret)
955 return ERR_PTR(ret);
956
957 index = drm_connector_index(connector);
958
959 if (index >= state->num_connector) {
960 struct __drm_connnectors_state *c;
961 int alloc = max(index + 1, config->num_connector);
962
963 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
964 if (!c)
965 return ERR_PTR(-ENOMEM);
966
967 state->connectors = c;
968 memset(&state->connectors[state->num_connector], 0,
969 sizeof(*state->connectors) * (alloc - state->num_connector));
970
971 state->num_connector = alloc;
972 }
973
974 if (state->connectors[index].state)
975 return state->connectors[index].state;
976
977 connector_state = connector->funcs->atomic_duplicate_state(connector);
978 if (!connector_state)
979 return ERR_PTR(-ENOMEM);
980
981 drm_connector_get(connector);
982 state->connectors[index].state = connector_state;
983 state->connectors[index].old_state = connector->state;
984 state->connectors[index].new_state = connector_state;
985 state->connectors[index].ptr = connector;
986 connector_state->state = state;
987
988 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
989 connector->base.id, connector->name,
990 connector_state, state);
991
992 if (connector_state->crtc) {
993 struct drm_crtc_state *crtc_state;
994
995 crtc_state = drm_atomic_get_crtc_state(state,
996 connector_state->crtc);
997 if (IS_ERR(crtc_state))
998 return ERR_CAST(crtc_state);
999 }
1000
1001 return connector_state;
1002}
1003EXPORT_SYMBOL(drm_atomic_get_connector_state);
1004
1005static void drm_atomic_connector_print_state(struct drm_printer *p,
1006 const struct drm_connector_state *state)
1007{
1008 struct drm_connector *connector = state->connector;
1009
1010 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1011 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1012 drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1013
1014 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1015 if (state->writeback_job && state->writeback_job->fb)
1016 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1017
1018 if (connector->funcs->atomic_print_state)
1019 connector->funcs->atomic_print_state(p, state);
1020}
1021
1022/**
1023 * drm_atomic_get_bridge_state - get bridge state
1024 * @state: global atomic state object
1025 * @bridge: bridge to get state object for
1026 *
1027 * This function returns the bridge state for the given bridge, allocating it
1028 * if needed. It will also grab the relevant bridge lock to make sure that the
1029 * state is consistent.
1030 *
1031 * Returns:
1032 *
1033 * Either the allocated state or the error code encoded into the pointer. When
1034 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1035 * entire atomic sequence must be restarted.
1036 */
1037struct drm_bridge_state *
1038drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1039 struct drm_bridge *bridge)
1040{
1041 struct drm_private_state *obj_state;
1042
1043 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
1044 if (IS_ERR(obj_state))
1045 return ERR_CAST(obj_state);
1046
1047 return drm_priv_to_bridge_state(obj_state);
1048}
1049EXPORT_SYMBOL(drm_atomic_get_bridge_state);
1050
1051/**
1052 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
1053 * @state: global atomic state object
1054 * @bridge: bridge to grab
1055 *
1056 * This function returns the old bridge state for the given bridge, or NULL if
1057 * the bridge is not part of the global atomic state.
1058 */
1059struct drm_bridge_state *
1060drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
1061 struct drm_bridge *bridge)
1062{
1063 struct drm_private_state *obj_state;
1064
1065 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
1066 if (!obj_state)
1067 return NULL;
1068
1069 return drm_priv_to_bridge_state(obj_state);
1070}
1071EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
1072
1073/**
1074 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
1075 * @state: global atomic state object
1076 * @bridge: bridge to grab
1077 *
1078 * This function returns the new bridge state for the given bridge, or NULL if
1079 * the bridge is not part of the global atomic state.
1080 */
1081struct drm_bridge_state *
1082drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
1083 struct drm_bridge *bridge)
1084{
1085 struct drm_private_state *obj_state;
1086
1087 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
1088 if (!obj_state)
1089 return NULL;
1090
1091 return drm_priv_to_bridge_state(obj_state);
1092}
1093EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
1094
1095/**
1096 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder
1097 * @state: atomic state
1098 * @encoder: DRM encoder
1099 *
1100 * This function adds all bridges attached to @encoder. This is needed to add
1101 * bridge states to @state and make them available when
1102 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),
1103 * &drm_bridge_funcs.atomic_enable(),
1104 * &drm_bridge_funcs.atomic_disable_post_disable() are called.
1105 *
1106 * Returns:
1107 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1108 * then the w/w mutex code has detected a deadlock and the entire atomic
1109 * sequence must be restarted. All other errors are fatal.
1110 */
1111int
1112drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
1113 struct drm_encoder *encoder)
1114{
1115 struct drm_bridge_state *bridge_state;
1116 struct drm_bridge *bridge;
1117
1118 if (!encoder)
1119 return 0;
1120
1121 DRM_DEBUG_ATOMIC("Adding all bridges for [encoder:%d:%s] to %p\n",
1122 encoder->base.id, encoder->name, state);
1123
1124 drm_for_each_bridge_in_chain(encoder, bridge) {
1125 /* Skip bridges that don't implement the atomic state hooks. */
1126 if (!bridge->funcs->atomic_duplicate_state)
1127 continue;
1128
1129 bridge_state = drm_atomic_get_bridge_state(state, bridge);
1130 if (IS_ERR(bridge_state))
1131 return PTR_ERR(bridge_state);
1132 }
1133
1134 return 0;
1135}
1136EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
1137
1138/**
1139 * drm_atomic_add_affected_connectors - add connectors for CRTC
1140 * @state: atomic state
1141 * @crtc: DRM CRTC
1142 *
1143 * This function walks the current configuration and adds all connectors
1144 * currently using @crtc to the atomic configuration @state. Note that this
1145 * function must acquire the connection mutex. This can potentially cause
1146 * unneeded seralization if the update is just for the planes on one CRTC. Hence
1147 * drivers and helpers should only call this when really needed (e.g. when a
1148 * full modeset needs to happen due to some change).
1149 *
1150 * Returns:
1151 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1152 * then the w/w mutex code has detected a deadlock and the entire atomic
1153 * sequence must be restarted. All other errors are fatal.
1154 */
1155int
1156drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1157 struct drm_crtc *crtc)
1158{
1159 struct drm_mode_config *config = &state->dev->mode_config;
1160 struct drm_connector *connector;
1161 struct drm_connector_state *conn_state;
1162 struct drm_connector_list_iter conn_iter;
1163 struct drm_crtc_state *crtc_state;
1164 int ret;
1165
1166 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1167 if (IS_ERR(crtc_state))
1168 return PTR_ERR(crtc_state);
1169
1170 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1171 if (ret)
1172 return ret;
1173
1174 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1175 crtc->base.id, crtc->name, state);
1176
1177 /*
1178 * Changed connectors are already in @state, so only need to look
1179 * at the connector_mask in crtc_state.
1180 */
1181 drm_connector_list_iter_begin(state->dev, &conn_iter);
1182 drm_for_each_connector_iter(connector, &conn_iter) {
1183 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1184 continue;
1185
1186 conn_state = drm_atomic_get_connector_state(state, connector);
1187 if (IS_ERR(conn_state)) {
1188 drm_connector_list_iter_end(&conn_iter);
1189 return PTR_ERR(conn_state);
1190 }
1191 }
1192 drm_connector_list_iter_end(&conn_iter);
1193
1194 return 0;
1195}
1196EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1197
1198/**
1199 * drm_atomic_add_affected_planes - add planes for CRTC
1200 * @state: atomic state
1201 * @crtc: DRM CRTC
1202 *
1203 * This function walks the current configuration and adds all planes
1204 * currently used by @crtc to the atomic configuration @state. This is useful
1205 * when an atomic commit also needs to check all currently enabled plane on
1206 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1207 * to avoid special code to force-enable all planes.
1208 *
1209 * Since acquiring a plane state will always also acquire the w/w mutex of the
1210 * current CRTC for that plane (if there is any) adding all the plane states for
1211 * a CRTC will not reduce parallism of atomic updates.
1212 *
1213 * Returns:
1214 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1215 * then the w/w mutex code has detected a deadlock and the entire atomic
1216 * sequence must be restarted. All other errors are fatal.
1217 */
1218int
1219drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1220 struct drm_crtc *crtc)
1221{
1222 const struct drm_crtc_state *old_crtc_state =
1223 drm_atomic_get_old_crtc_state(state, crtc);
1224 struct drm_plane *plane;
1225
1226 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1227
1228 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
1229 crtc->base.id, crtc->name, state);
1230
1231 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1232 struct drm_plane_state *plane_state =
1233 drm_atomic_get_plane_state(state, plane);
1234
1235 if (IS_ERR(plane_state))
1236 return PTR_ERR(plane_state);
1237 }
1238 return 0;
1239}
1240EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1241
1242/**
1243 * drm_atomic_check_only - check whether a given config would work
1244 * @state: atomic configuration to check
1245 *
1246 * Note that this function can return -EDEADLK if the driver needed to acquire
1247 * more locks but encountered a deadlock. The caller must then do the usual w/w
1248 * backoff dance and restart. All other errors are fatal.
1249 *
1250 * Returns:
1251 * 0 on success, negative error code on failure.
1252 */
1253int drm_atomic_check_only(struct drm_atomic_state *state)
1254{
1255 struct drm_device *dev = state->dev;
1256 struct drm_mode_config *config = &dev->mode_config;
1257 struct drm_plane *plane;
1258 struct drm_plane_state *old_plane_state;
1259 struct drm_plane_state *new_plane_state;
1260 struct drm_crtc *crtc;
1261 struct drm_crtc_state *old_crtc_state;
1262 struct drm_crtc_state *new_crtc_state;
1263 struct drm_connector *conn;
1264 struct drm_connector_state *conn_state;
1265 int i, ret = 0;
1266
1267 DRM_DEBUG_ATOMIC("checking %p\n", state);
1268
1269 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1270 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1271 if (ret) {
1272 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1273 plane->base.id, plane->name);
1274 return ret;
1275 }
1276 }
1277
1278 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1279 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1280 if (ret) {
1281 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1282 crtc->base.id, crtc->name);
1283 return ret;
1284 }
1285 }
1286
1287 for_each_new_connector_in_state(state, conn, conn_state, i) {
1288 ret = drm_atomic_connector_check(conn, conn_state);
1289 if (ret) {
1290 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n",
1291 conn->base.id, conn->name);
1292 return ret;
1293 }
1294 }
1295
1296 if (config->funcs->atomic_check) {
1297 ret = config->funcs->atomic_check(state->dev, state);
1298
1299 if (ret) {
1300 DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
1301 state, ret);
1302 return ret;
1303 }
1304 }
1305
1306 if (!state->allow_modeset) {
1307 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1308 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1309 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1310 crtc->base.id, crtc->name);
1311 return -EINVAL;
1312 }
1313 }
1314 }
1315
1316 return 0;
1317}
1318EXPORT_SYMBOL(drm_atomic_check_only);
1319
1320/**
1321 * drm_atomic_commit - commit configuration atomically
1322 * @state: atomic configuration to check
1323 *
1324 * Note that this function can return -EDEADLK if the driver needed to acquire
1325 * more locks but encountered a deadlock. The caller must then do the usual w/w
1326 * backoff dance and restart. All other errors are fatal.
1327 *
1328 * This function will take its own reference on @state.
1329 * Callers should always release their reference with drm_atomic_state_put().
1330 *
1331 * Returns:
1332 * 0 on success, negative error code on failure.
1333 */
1334int drm_atomic_commit(struct drm_atomic_state *state)
1335{
1336 struct drm_mode_config *config = &state->dev->mode_config;
1337 int ret;
1338
1339 ret = drm_atomic_check_only(state);
1340 if (ret)
1341 return ret;
1342
1343 DRM_DEBUG_ATOMIC("committing %p\n", state);
1344
1345 return config->funcs->atomic_commit(state->dev, state, false);
1346}
1347EXPORT_SYMBOL(drm_atomic_commit);
1348
1349/**
1350 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1351 * @state: atomic configuration to check
1352 *
1353 * Note that this function can return -EDEADLK if the driver needed to acquire
1354 * more locks but encountered a deadlock. The caller must then do the usual w/w
1355 * backoff dance and restart. All other errors are fatal.
1356 *
1357 * This function will take its own reference on @state.
1358 * Callers should always release their reference with drm_atomic_state_put().
1359 *
1360 * Returns:
1361 * 0 on success, negative error code on failure.
1362 */
1363int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1364{
1365 struct drm_mode_config *config = &state->dev->mode_config;
1366 int ret;
1367
1368 ret = drm_atomic_check_only(state);
1369 if (ret)
1370 return ret;
1371
1372 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1373
1374 return config->funcs->atomic_commit(state->dev, state, true);
1375}
1376EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1377
1378/* just used from drm-client and atomic-helper: */
1379int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1380 struct drm_plane_state *plane_state)
1381{
1382 int ret;
1383
1384 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1385 if (ret != 0)
1386 return ret;
1387
1388 drm_atomic_set_fb_for_plane(plane_state, NULL);
1389 plane_state->crtc_x = 0;
1390 plane_state->crtc_y = 0;
1391 plane_state->crtc_w = 0;
1392 plane_state->crtc_h = 0;
1393 plane_state->src_x = 0;
1394 plane_state->src_y = 0;
1395 plane_state->src_w = 0;
1396 plane_state->src_h = 0;
1397
1398 return 0;
1399}
1400EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1401
1402static int update_output_state(struct drm_atomic_state *state,
1403 struct drm_mode_set *set)
1404{
1405 struct drm_device *dev = set->crtc->dev;
1406 struct drm_crtc *crtc;
1407 struct drm_crtc_state *new_crtc_state;
1408 struct drm_connector *connector;
1409 struct drm_connector_state *new_conn_state;
1410 int ret, i;
1411
1412 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1413 state->acquire_ctx);
1414 if (ret)
1415 return ret;
1416
1417 /* First disable all connectors on the target crtc. */
1418 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1419 if (ret)
1420 return ret;
1421
1422 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1423 if (new_conn_state->crtc == set->crtc) {
1424 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1425 NULL);
1426 if (ret)
1427 return ret;
1428
1429 /* Make sure legacy setCrtc always re-trains */
1430 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1431 }
1432 }
1433
1434 /* Then set all connectors from set->connectors on the target crtc */
1435 for (i = 0; i < set->num_connectors; i++) {
1436 new_conn_state = drm_atomic_get_connector_state(state,
1437 set->connectors[i]);
1438 if (IS_ERR(new_conn_state))
1439 return PTR_ERR(new_conn_state);
1440
1441 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1442 set->crtc);
1443 if (ret)
1444 return ret;
1445 }
1446
1447 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1448 /*
1449 * Don't update ->enable for the CRTC in the set_config request,
1450 * since a mismatch would indicate a bug in the upper layers.
1451 * The actual modeset code later on will catch any
1452 * inconsistencies here.
1453 */
1454 if (crtc == set->crtc)
1455 continue;
1456
1457 if (!new_crtc_state->connector_mask) {
1458 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1459 NULL);
1460 if (ret < 0)
1461 return ret;
1462
1463 new_crtc_state->active = false;
1464 }
1465 }
1466
1467 return 0;
1468}
1469
1470/* just used from drm-client and atomic-helper: */
1471int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1472 struct drm_atomic_state *state)
1473{
1474 struct drm_crtc_state *crtc_state;
1475 struct drm_plane_state *primary_state;
1476 struct drm_crtc *crtc = set->crtc;
1477 int hdisplay, vdisplay;
1478 int ret;
1479
1480 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1481 if (IS_ERR(crtc_state))
1482 return PTR_ERR(crtc_state);
1483
1484 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1485 if (IS_ERR(primary_state))
1486 return PTR_ERR(primary_state);
1487
1488 if (!set->mode) {
1489 WARN_ON(set->fb);
1490 WARN_ON(set->num_connectors);
1491
1492 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1493 if (ret != 0)
1494 return ret;
1495
1496 crtc_state->active = false;
1497
1498 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1499 if (ret != 0)
1500 return ret;
1501
1502 drm_atomic_set_fb_for_plane(primary_state, NULL);
1503
1504 goto commit;
1505 }
1506
1507 WARN_ON(!set->fb);
1508 WARN_ON(!set->num_connectors);
1509
1510 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1511 if (ret != 0)
1512 return ret;
1513
1514 crtc_state->active = true;
1515
1516 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1517 if (ret != 0)
1518 return ret;
1519
1520 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1521
1522 drm_atomic_set_fb_for_plane(primary_state, set->fb);
1523 primary_state->crtc_x = 0;
1524 primary_state->crtc_y = 0;
1525 primary_state->crtc_w = hdisplay;
1526 primary_state->crtc_h = vdisplay;
1527 primary_state->src_x = set->x << 16;
1528 primary_state->src_y = set->y << 16;
1529 if (drm_rotation_90_or_270(primary_state->rotation)) {
1530 primary_state->src_w = vdisplay << 16;
1531 primary_state->src_h = hdisplay << 16;
1532 } else {
1533 primary_state->src_w = hdisplay << 16;
1534 primary_state->src_h = vdisplay << 16;
1535 }
1536
1537commit:
1538 ret = update_output_state(state, set);
1539 if (ret)
1540 return ret;
1541
1542 return 0;
1543}
1544EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1545
1546void drm_atomic_print_state(const struct drm_atomic_state *state)
1547{
1548 struct drm_printer p = drm_info_printer(state->dev->dev);
1549 struct drm_plane *plane;
1550 struct drm_plane_state *plane_state;
1551 struct drm_crtc *crtc;
1552 struct drm_crtc_state *crtc_state;
1553 struct drm_connector *connector;
1554 struct drm_connector_state *connector_state;
1555 int i;
1556
1557 DRM_DEBUG_ATOMIC("checking %p\n", state);
1558
1559 for_each_new_plane_in_state(state, plane, plane_state, i)
1560 drm_atomic_plane_print_state(&p, plane_state);
1561
1562 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1563 drm_atomic_crtc_print_state(&p, crtc_state);
1564
1565 for_each_new_connector_in_state(state, connector, connector_state, i)
1566 drm_atomic_connector_print_state(&p, connector_state);
1567}
1568
1569static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1570 bool take_locks)
1571{
1572 struct drm_mode_config *config = &dev->mode_config;
1573 struct drm_plane *plane;
1574 struct drm_crtc *crtc;
1575 struct drm_connector *connector;
1576 struct drm_connector_list_iter conn_iter;
1577
1578 if (!drm_drv_uses_atomic_modeset(dev))
1579 return;
1580
1581 list_for_each_entry(plane, &config->plane_list, head) {
1582 if (take_locks)
1583 drm_modeset_lock(&plane->mutex, NULL);
1584 drm_atomic_plane_print_state(p, plane->state);
1585 if (take_locks)
1586 drm_modeset_unlock(&plane->mutex);
1587 }
1588
1589 list_for_each_entry(crtc, &config->crtc_list, head) {
1590 if (take_locks)
1591 drm_modeset_lock(&crtc->mutex, NULL);
1592 drm_atomic_crtc_print_state(p, crtc->state);
1593 if (take_locks)
1594 drm_modeset_unlock(&crtc->mutex);
1595 }
1596
1597 drm_connector_list_iter_begin(dev, &conn_iter);
1598 if (take_locks)
1599 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1600 drm_for_each_connector_iter(connector, &conn_iter)
1601 drm_atomic_connector_print_state(p, connector->state);
1602 if (take_locks)
1603 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1604 drm_connector_list_iter_end(&conn_iter);
1605}
1606
1607/**
1608 * drm_state_dump - dump entire device atomic state
1609 * @dev: the drm device
1610 * @p: where to print the state to
1611 *
1612 * Just for debugging. Drivers might want an option to dump state
1613 * to dmesg in case of error irq's. (Hint, you probably want to
1614 * ratelimit this!)
1615 *
1616 * The caller must drm_modeset_lock_all(), or if this is called
1617 * from error irq handler, it should not be enabled by default.
1618 * (Ie. if you are debugging errors you might not care that this
1619 * is racey. But calling this without all modeset locks held is
1620 * not inherently safe.)
1621 */
1622void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1623{
1624 __drm_state_dump(dev, p, false);
1625}
1626EXPORT_SYMBOL(drm_state_dump);
1627
1628#ifdef CONFIG_DEBUG_FS
1629static int drm_state_info(struct seq_file *m, void *data)
1630{
1631 struct drm_info_node *node = (struct drm_info_node *) m->private;
1632 struct drm_device *dev = node->minor->dev;
1633 struct drm_printer p = drm_seq_file_printer(m);
1634
1635 __drm_state_dump(dev, &p, true);
1636
1637 return 0;
1638}
1639
1640/* any use in debugfs files to dump individual planes/crtc/etc? */
1641static const struct drm_info_list drm_atomic_debugfs_list[] = {
1642 {"state", drm_state_info, 0},
1643};
1644
1645void drm_atomic_debugfs_init(struct drm_minor *minor)
1646{
1647 drm_debugfs_create_files(drm_atomic_debugfs_list,
1648 ARRAY_SIZE(drm_atomic_debugfs_list),
1649 minor->debugfs_root, minor);
1650}
1651#endif
1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28
29#include <drm/drmP.h>
30#include <drm/drm_atomic.h>
31#include <drm/drm_mode.h>
32#include <drm/drm_plane_helper.h>
33
34/**
35 * drm_atomic_state_default_release -
36 * release memory initialized by drm_atomic_state_init
37 * @state: atomic state
38 *
39 * Free all the memory allocated by drm_atomic_state_init.
40 * This is useful for drivers that subclass the atomic state.
41 */
42void drm_atomic_state_default_release(struct drm_atomic_state *state)
43{
44 kfree(state->connectors);
45 kfree(state->connector_states);
46 kfree(state->crtcs);
47 kfree(state->crtc_states);
48 kfree(state->planes);
49 kfree(state->plane_states);
50}
51EXPORT_SYMBOL(drm_atomic_state_default_release);
52
53/**
54 * drm_atomic_state_init - init new atomic state
55 * @dev: DRM device
56 * @state: atomic state
57 *
58 * Default implementation for filling in a new atomic state.
59 * This is useful for drivers that subclass the atomic state.
60 */
61int
62drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
63{
64 /* TODO legacy paths should maybe do a better job about
65 * setting this appropriately?
66 */
67 state->allow_modeset = true;
68
69 state->crtcs = kcalloc(dev->mode_config.num_crtc,
70 sizeof(*state->crtcs), GFP_KERNEL);
71 if (!state->crtcs)
72 goto fail;
73 state->crtc_states = kcalloc(dev->mode_config.num_crtc,
74 sizeof(*state->crtc_states), GFP_KERNEL);
75 if (!state->crtc_states)
76 goto fail;
77 state->planes = kcalloc(dev->mode_config.num_total_plane,
78 sizeof(*state->planes), GFP_KERNEL);
79 if (!state->planes)
80 goto fail;
81 state->plane_states = kcalloc(dev->mode_config.num_total_plane,
82 sizeof(*state->plane_states), GFP_KERNEL);
83 if (!state->plane_states)
84 goto fail;
85
86 state->dev = dev;
87
88 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
89
90 return 0;
91fail:
92 drm_atomic_state_default_release(state);
93 return -ENOMEM;
94}
95EXPORT_SYMBOL(drm_atomic_state_init);
96
97/**
98 * drm_atomic_state_alloc - allocate atomic state
99 * @dev: DRM device
100 *
101 * This allocates an empty atomic state to track updates.
102 */
103struct drm_atomic_state *
104drm_atomic_state_alloc(struct drm_device *dev)
105{
106 struct drm_mode_config *config = &dev->mode_config;
107 struct drm_atomic_state *state;
108
109 if (!config->funcs->atomic_state_alloc) {
110 state = kzalloc(sizeof(*state), GFP_KERNEL);
111 if (!state)
112 return NULL;
113 if (drm_atomic_state_init(dev, state) < 0) {
114 kfree(state);
115 return NULL;
116 }
117 return state;
118 }
119
120 return config->funcs->atomic_state_alloc(dev);
121}
122EXPORT_SYMBOL(drm_atomic_state_alloc);
123
124/**
125 * drm_atomic_state_default_clear - clear base atomic state
126 * @state: atomic state
127 *
128 * Default implementation for clearing atomic state.
129 * This is useful for drivers that subclass the atomic state.
130 */
131void drm_atomic_state_default_clear(struct drm_atomic_state *state)
132{
133 struct drm_device *dev = state->dev;
134 struct drm_mode_config *config = &dev->mode_config;
135 int i;
136
137 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
138
139 for (i = 0; i < state->num_connector; i++) {
140 struct drm_connector *connector = state->connectors[i];
141
142 if (!connector)
143 continue;
144
145 /*
146 * FIXME: Async commits can race with connector unplugging and
147 * there's currently nothing that prevents cleanup up state for
148 * deleted connectors. As long as the callback doesn't look at
149 * the connector we'll be fine though, so make sure that's the
150 * case by setting all connector pointers to NULL.
151 */
152 state->connector_states[i]->connector = NULL;
153 connector->funcs->atomic_destroy_state(NULL,
154 state->connector_states[i]);
155 state->connectors[i] = NULL;
156 state->connector_states[i] = NULL;
157 }
158
159 for (i = 0; i < config->num_crtc; i++) {
160 struct drm_crtc *crtc = state->crtcs[i];
161
162 if (!crtc)
163 continue;
164
165 crtc->funcs->atomic_destroy_state(crtc,
166 state->crtc_states[i]);
167 state->crtcs[i] = NULL;
168 state->crtc_states[i] = NULL;
169 }
170
171 for (i = 0; i < config->num_total_plane; i++) {
172 struct drm_plane *plane = state->planes[i];
173
174 if (!plane)
175 continue;
176
177 plane->funcs->atomic_destroy_state(plane,
178 state->plane_states[i]);
179 state->planes[i] = NULL;
180 state->plane_states[i] = NULL;
181 }
182}
183EXPORT_SYMBOL(drm_atomic_state_default_clear);
184
185/**
186 * drm_atomic_state_clear - clear state object
187 * @state: atomic state
188 *
189 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
190 * all locks. So someone else could sneak in and change the current modeset
191 * configuration. Which means that all the state assembled in @state is no
192 * longer an atomic update to the current state, but to some arbitrary earlier
193 * state. Which could break assumptions the driver's ->atomic_check likely
194 * relies on.
195 *
196 * Hence we must clear all cached state and completely start over, using this
197 * function.
198 */
199void drm_atomic_state_clear(struct drm_atomic_state *state)
200{
201 struct drm_device *dev = state->dev;
202 struct drm_mode_config *config = &dev->mode_config;
203
204 if (config->funcs->atomic_state_clear)
205 config->funcs->atomic_state_clear(state);
206 else
207 drm_atomic_state_default_clear(state);
208}
209EXPORT_SYMBOL(drm_atomic_state_clear);
210
211/**
212 * drm_atomic_state_free - free all memory for an atomic state
213 * @state: atomic state to deallocate
214 *
215 * This frees all memory associated with an atomic state, including all the
216 * per-object state for planes, crtcs and connectors.
217 */
218void drm_atomic_state_free(struct drm_atomic_state *state)
219{
220 struct drm_device *dev;
221 struct drm_mode_config *config;
222
223 if (!state)
224 return;
225
226 dev = state->dev;
227 config = &dev->mode_config;
228
229 drm_atomic_state_clear(state);
230
231 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
232
233 if (config->funcs->atomic_state_free) {
234 config->funcs->atomic_state_free(state);
235 } else {
236 drm_atomic_state_default_release(state);
237 kfree(state);
238 }
239}
240EXPORT_SYMBOL(drm_atomic_state_free);
241
242/**
243 * drm_atomic_get_crtc_state - get crtc state
244 * @state: global atomic state object
245 * @crtc: crtc to get state object for
246 *
247 * This function returns the crtc state for the given crtc, allocating it if
248 * needed. It will also grab the relevant crtc lock to make sure that the state
249 * is consistent.
250 *
251 * Returns:
252 *
253 * Either the allocated state or the error code encoded into the pointer. When
254 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
255 * entire atomic sequence must be restarted. All other errors are fatal.
256 */
257struct drm_crtc_state *
258drm_atomic_get_crtc_state(struct drm_atomic_state *state,
259 struct drm_crtc *crtc)
260{
261 int ret, index = drm_crtc_index(crtc);
262 struct drm_crtc_state *crtc_state;
263
264 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
265 if (crtc_state)
266 return crtc_state;
267
268 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
269 if (ret)
270 return ERR_PTR(ret);
271
272 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
273 if (!crtc_state)
274 return ERR_PTR(-ENOMEM);
275
276 state->crtc_states[index] = crtc_state;
277 state->crtcs[index] = crtc;
278 crtc_state->state = state;
279
280 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
281 crtc->base.id, crtc->name, crtc_state, state);
282
283 return crtc_state;
284}
285EXPORT_SYMBOL(drm_atomic_get_crtc_state);
286
287/**
288 * drm_atomic_set_mode_for_crtc - set mode for CRTC
289 * @state: the CRTC whose incoming state to update
290 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
291 *
292 * Set a mode (originating from the kernel) on the desired CRTC state. Does
293 * not change any other state properties, including enable, active, or
294 * mode_changed.
295 *
296 * RETURNS:
297 * Zero on success, error code on failure. Cannot return -EDEADLK.
298 */
299int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
300 struct drm_display_mode *mode)
301{
302 struct drm_mode_modeinfo umode;
303
304 /* Early return for no change. */
305 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
306 return 0;
307
308 drm_property_unreference_blob(state->mode_blob);
309 state->mode_blob = NULL;
310
311 if (mode) {
312 drm_mode_convert_to_umode(&umode, mode);
313 state->mode_blob =
314 drm_property_create_blob(state->crtc->dev,
315 sizeof(umode),
316 &umode);
317 if (IS_ERR(state->mode_blob))
318 return PTR_ERR(state->mode_blob);
319
320 drm_mode_copy(&state->mode, mode);
321 state->enable = true;
322 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
323 mode->name, state);
324 } else {
325 memset(&state->mode, 0, sizeof(state->mode));
326 state->enable = false;
327 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
328 state);
329 }
330
331 return 0;
332}
333EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
334
335/**
336 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
337 * @state: the CRTC whose incoming state to update
338 * @blob: pointer to blob property to use for mode
339 *
340 * Set a mode (originating from a blob property) on the desired CRTC state.
341 * This function will take a reference on the blob property for the CRTC state,
342 * and release the reference held on the state's existing mode property, if any
343 * was set.
344 *
345 * RETURNS:
346 * Zero on success, error code on failure. Cannot return -EDEADLK.
347 */
348int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
349 struct drm_property_blob *blob)
350{
351 if (blob == state->mode_blob)
352 return 0;
353
354 drm_property_unreference_blob(state->mode_blob);
355 state->mode_blob = NULL;
356
357 if (blob) {
358 if (blob->length != sizeof(struct drm_mode_modeinfo) ||
359 drm_mode_convert_umode(&state->mode,
360 (const struct drm_mode_modeinfo *)
361 blob->data))
362 return -EINVAL;
363
364 state->mode_blob = drm_property_reference_blob(blob);
365 state->enable = true;
366 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
367 state->mode.name, state);
368 } else {
369 memset(&state->mode, 0, sizeof(state->mode));
370 state->enable = false;
371 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
372 state);
373 }
374
375 return 0;
376}
377EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
378
379/**
380 * drm_atomic_replace_property_blob - replace a blob property
381 * @blob: a pointer to the member blob to be replaced
382 * @new_blob: the new blob to replace with
383 * @replaced: whether the blob has been replaced
384 *
385 * RETURNS:
386 * Zero on success, error code on failure
387 */
388static void
389drm_atomic_replace_property_blob(struct drm_property_blob **blob,
390 struct drm_property_blob *new_blob,
391 bool *replaced)
392{
393 struct drm_property_blob *old_blob = *blob;
394
395 if (old_blob == new_blob)
396 return;
397
398 if (old_blob)
399 drm_property_unreference_blob(old_blob);
400 if (new_blob)
401 drm_property_reference_blob(new_blob);
402 *blob = new_blob;
403 *replaced = true;
404
405 return;
406}
407
408static int
409drm_atomic_replace_property_blob_from_id(struct drm_crtc *crtc,
410 struct drm_property_blob **blob,
411 uint64_t blob_id,
412 ssize_t expected_size,
413 bool *replaced)
414{
415 struct drm_device *dev = crtc->dev;
416 struct drm_property_blob *new_blob = NULL;
417
418 if (blob_id != 0) {
419 new_blob = drm_property_lookup_blob(dev, blob_id);
420 if (new_blob == NULL)
421 return -EINVAL;
422 if (expected_size > 0 && expected_size != new_blob->length)
423 return -EINVAL;
424 }
425
426 drm_atomic_replace_property_blob(blob, new_blob, replaced);
427
428 return 0;
429}
430
431/**
432 * drm_atomic_crtc_set_property - set property on CRTC
433 * @crtc: the drm CRTC to set a property on
434 * @state: the state object to update with the new property value
435 * @property: the property to set
436 * @val: the new property value
437 *
438 * Use this instead of calling crtc->atomic_set_property directly.
439 * This function handles generic/core properties and calls out to
440 * driver's ->atomic_set_property() for driver properties. To ensure
441 * consistent behavior you must call this function rather than the
442 * driver hook directly.
443 *
444 * RETURNS:
445 * Zero on success, error code on failure
446 */
447int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
448 struct drm_crtc_state *state, struct drm_property *property,
449 uint64_t val)
450{
451 struct drm_device *dev = crtc->dev;
452 struct drm_mode_config *config = &dev->mode_config;
453 bool replaced = false;
454 int ret;
455
456 if (property == config->prop_active)
457 state->active = val;
458 else if (property == config->prop_mode_id) {
459 struct drm_property_blob *mode =
460 drm_property_lookup_blob(dev, val);
461 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
462 drm_property_unreference_blob(mode);
463 return ret;
464 } else if (property == config->degamma_lut_property) {
465 ret = drm_atomic_replace_property_blob_from_id(crtc,
466 &state->degamma_lut,
467 val,
468 -1,
469 &replaced);
470 state->color_mgmt_changed = replaced;
471 return ret;
472 } else if (property == config->ctm_property) {
473 ret = drm_atomic_replace_property_blob_from_id(crtc,
474 &state->ctm,
475 val,
476 sizeof(struct drm_color_ctm),
477 &replaced);
478 state->color_mgmt_changed = replaced;
479 return ret;
480 } else if (property == config->gamma_lut_property) {
481 ret = drm_atomic_replace_property_blob_from_id(crtc,
482 &state->gamma_lut,
483 val,
484 -1,
485 &replaced);
486 state->color_mgmt_changed = replaced;
487 return ret;
488 } else if (crtc->funcs->atomic_set_property)
489 return crtc->funcs->atomic_set_property(crtc, state, property, val);
490 else
491 return -EINVAL;
492
493 return 0;
494}
495EXPORT_SYMBOL(drm_atomic_crtc_set_property);
496
497/**
498 * drm_atomic_crtc_get_property - get property value from CRTC state
499 * @crtc: the drm CRTC to set a property on
500 * @state: the state object to get the property value from
501 * @property: the property to set
502 * @val: return location for the property value
503 *
504 * This function handles generic/core properties and calls out to
505 * driver's ->atomic_get_property() for driver properties. To ensure
506 * consistent behavior you must call this function rather than the
507 * driver hook directly.
508 *
509 * RETURNS:
510 * Zero on success, error code on failure
511 */
512static int
513drm_atomic_crtc_get_property(struct drm_crtc *crtc,
514 const struct drm_crtc_state *state,
515 struct drm_property *property, uint64_t *val)
516{
517 struct drm_device *dev = crtc->dev;
518 struct drm_mode_config *config = &dev->mode_config;
519
520 if (property == config->prop_active)
521 *val = state->active;
522 else if (property == config->prop_mode_id)
523 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
524 else if (property == config->degamma_lut_property)
525 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
526 else if (property == config->ctm_property)
527 *val = (state->ctm) ? state->ctm->base.id : 0;
528 else if (property == config->gamma_lut_property)
529 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
530 else if (crtc->funcs->atomic_get_property)
531 return crtc->funcs->atomic_get_property(crtc, state, property, val);
532 else
533 return -EINVAL;
534
535 return 0;
536}
537
538/**
539 * drm_atomic_crtc_check - check crtc state
540 * @crtc: crtc to check
541 * @state: crtc state to check
542 *
543 * Provides core sanity checks for crtc state.
544 *
545 * RETURNS:
546 * Zero on success, error code on failure
547 */
548static int drm_atomic_crtc_check(struct drm_crtc *crtc,
549 struct drm_crtc_state *state)
550{
551 /* NOTE: we explicitly don't enforce constraints such as primary
552 * layer covering entire screen, since that is something we want
553 * to allow (on hw that supports it). For hw that does not, it
554 * should be checked in driver's crtc->atomic_check() vfunc.
555 *
556 * TODO: Add generic modeset state checks once we support those.
557 */
558
559 if (state->active && !state->enable) {
560 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
561 crtc->base.id, crtc->name);
562 return -EINVAL;
563 }
564
565 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
566 * as this is a kernel-internal detail that userspace should never
567 * be able to trigger. */
568 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
569 WARN_ON(state->enable && !state->mode_blob)) {
570 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
571 crtc->base.id, crtc->name);
572 return -EINVAL;
573 }
574
575 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
576 WARN_ON(!state->enable && state->mode_blob)) {
577 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
578 crtc->base.id, crtc->name);
579 return -EINVAL;
580 }
581
582 /*
583 * Reject event generation for when a CRTC is off and stays off.
584 * It wouldn't be hard to implement this, but userspace has a track
585 * record of happily burning through 100% cpu (or worse, crash) when the
586 * display pipe is suspended. To avoid all that fun just reject updates
587 * that ask for events since likely that indicates a bug in the
588 * compositor's drawing loop. This is consistent with the vblank IOCTL
589 * and legacy page_flip IOCTL which also reject service on a disabled
590 * pipe.
591 */
592 if (state->event && !state->active && !crtc->state->active) {
593 DRM_DEBUG_ATOMIC("[CRTC:%d] requesting event but off\n",
594 crtc->base.id);
595 return -EINVAL;
596 }
597
598 return 0;
599}
600
601/**
602 * drm_atomic_get_plane_state - get plane state
603 * @state: global atomic state object
604 * @plane: plane to get state object for
605 *
606 * This function returns the plane state for the given plane, allocating it if
607 * needed. It will also grab the relevant plane lock to make sure that the state
608 * is consistent.
609 *
610 * Returns:
611 *
612 * Either the allocated state or the error code encoded into the pointer. When
613 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
614 * entire atomic sequence must be restarted. All other errors are fatal.
615 */
616struct drm_plane_state *
617drm_atomic_get_plane_state(struct drm_atomic_state *state,
618 struct drm_plane *plane)
619{
620 int ret, index = drm_plane_index(plane);
621 struct drm_plane_state *plane_state;
622
623 plane_state = drm_atomic_get_existing_plane_state(state, plane);
624 if (plane_state)
625 return plane_state;
626
627 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
628 if (ret)
629 return ERR_PTR(ret);
630
631 plane_state = plane->funcs->atomic_duplicate_state(plane);
632 if (!plane_state)
633 return ERR_PTR(-ENOMEM);
634
635 state->plane_states[index] = plane_state;
636 state->planes[index] = plane;
637 plane_state->state = state;
638
639 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
640 plane->base.id, plane->name, plane_state, state);
641
642 if (plane_state->crtc) {
643 struct drm_crtc_state *crtc_state;
644
645 crtc_state = drm_atomic_get_crtc_state(state,
646 plane_state->crtc);
647 if (IS_ERR(crtc_state))
648 return ERR_CAST(crtc_state);
649 }
650
651 return plane_state;
652}
653EXPORT_SYMBOL(drm_atomic_get_plane_state);
654
655/**
656 * drm_atomic_plane_set_property - set property on plane
657 * @plane: the drm plane to set a property on
658 * @state: the state object to update with the new property value
659 * @property: the property to set
660 * @val: the new property value
661 *
662 * Use this instead of calling plane->atomic_set_property directly.
663 * This function handles generic/core properties and calls out to
664 * driver's ->atomic_set_property() for driver properties. To ensure
665 * consistent behavior you must call this function rather than the
666 * driver hook directly.
667 *
668 * RETURNS:
669 * Zero on success, error code on failure
670 */
671int drm_atomic_plane_set_property(struct drm_plane *plane,
672 struct drm_plane_state *state, struct drm_property *property,
673 uint64_t val)
674{
675 struct drm_device *dev = plane->dev;
676 struct drm_mode_config *config = &dev->mode_config;
677
678 if (property == config->prop_fb_id) {
679 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val);
680 drm_atomic_set_fb_for_plane(state, fb);
681 if (fb)
682 drm_framebuffer_unreference(fb);
683 } else if (property == config->prop_crtc_id) {
684 struct drm_crtc *crtc = drm_crtc_find(dev, val);
685 return drm_atomic_set_crtc_for_plane(state, crtc);
686 } else if (property == config->prop_crtc_x) {
687 state->crtc_x = U642I64(val);
688 } else if (property == config->prop_crtc_y) {
689 state->crtc_y = U642I64(val);
690 } else if (property == config->prop_crtc_w) {
691 state->crtc_w = val;
692 } else if (property == config->prop_crtc_h) {
693 state->crtc_h = val;
694 } else if (property == config->prop_src_x) {
695 state->src_x = val;
696 } else if (property == config->prop_src_y) {
697 state->src_y = val;
698 } else if (property == config->prop_src_w) {
699 state->src_w = val;
700 } else if (property == config->prop_src_h) {
701 state->src_h = val;
702 } else if (property == config->rotation_property) {
703 state->rotation = val;
704 } else if (plane->funcs->atomic_set_property) {
705 return plane->funcs->atomic_set_property(plane, state,
706 property, val);
707 } else {
708 return -EINVAL;
709 }
710
711 return 0;
712}
713EXPORT_SYMBOL(drm_atomic_plane_set_property);
714
715/**
716 * drm_atomic_plane_get_property - get property value from plane state
717 * @plane: the drm plane to set a property on
718 * @state: the state object to get the property value from
719 * @property: the property to set
720 * @val: return location for the property value
721 *
722 * This function handles generic/core properties and calls out to
723 * driver's ->atomic_get_property() for driver properties. To ensure
724 * consistent behavior you must call this function rather than the
725 * driver hook directly.
726 *
727 * RETURNS:
728 * Zero on success, error code on failure
729 */
730static int
731drm_atomic_plane_get_property(struct drm_plane *plane,
732 const struct drm_plane_state *state,
733 struct drm_property *property, uint64_t *val)
734{
735 struct drm_device *dev = plane->dev;
736 struct drm_mode_config *config = &dev->mode_config;
737
738 if (property == config->prop_fb_id) {
739 *val = (state->fb) ? state->fb->base.id : 0;
740 } else if (property == config->prop_crtc_id) {
741 *val = (state->crtc) ? state->crtc->base.id : 0;
742 } else if (property == config->prop_crtc_x) {
743 *val = I642U64(state->crtc_x);
744 } else if (property == config->prop_crtc_y) {
745 *val = I642U64(state->crtc_y);
746 } else if (property == config->prop_crtc_w) {
747 *val = state->crtc_w;
748 } else if (property == config->prop_crtc_h) {
749 *val = state->crtc_h;
750 } else if (property == config->prop_src_x) {
751 *val = state->src_x;
752 } else if (property == config->prop_src_y) {
753 *val = state->src_y;
754 } else if (property == config->prop_src_w) {
755 *val = state->src_w;
756 } else if (property == config->prop_src_h) {
757 *val = state->src_h;
758 } else if (property == config->rotation_property) {
759 *val = state->rotation;
760 } else if (plane->funcs->atomic_get_property) {
761 return plane->funcs->atomic_get_property(plane, state, property, val);
762 } else {
763 return -EINVAL;
764 }
765
766 return 0;
767}
768
769static bool
770plane_switching_crtc(struct drm_atomic_state *state,
771 struct drm_plane *plane,
772 struct drm_plane_state *plane_state)
773{
774 if (!plane->state->crtc || !plane_state->crtc)
775 return false;
776
777 if (plane->state->crtc == plane_state->crtc)
778 return false;
779
780 /* This could be refined, but currently there's no helper or driver code
781 * to implement direct switching of active planes nor userspace to take
782 * advantage of more direct plane switching without the intermediate
783 * full OFF state.
784 */
785 return true;
786}
787
788/**
789 * drm_atomic_plane_check - check plane state
790 * @plane: plane to check
791 * @state: plane state to check
792 *
793 * Provides core sanity checks for plane state.
794 *
795 * RETURNS:
796 * Zero on success, error code on failure
797 */
798static int drm_atomic_plane_check(struct drm_plane *plane,
799 struct drm_plane_state *state)
800{
801 unsigned int fb_width, fb_height;
802 int ret;
803
804 /* either *both* CRTC and FB must be set, or neither */
805 if (WARN_ON(state->crtc && !state->fb)) {
806 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
807 return -EINVAL;
808 } else if (WARN_ON(state->fb && !state->crtc)) {
809 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
810 return -EINVAL;
811 }
812
813 /* if disabled, we don't care about the rest of the state: */
814 if (!state->crtc)
815 return 0;
816
817 /* Check whether this plane is usable on this CRTC */
818 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
819 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
820 return -EINVAL;
821 }
822
823 /* Check whether this plane supports the fb pixel format. */
824 ret = drm_plane_check_pixel_format(plane, state->fb->pixel_format);
825 if (ret) {
826 DRM_DEBUG_ATOMIC("Invalid pixel format %s\n",
827 drm_get_format_name(state->fb->pixel_format));
828 return ret;
829 }
830
831 /* Give drivers some help against integer overflows */
832 if (state->crtc_w > INT_MAX ||
833 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
834 state->crtc_h > INT_MAX ||
835 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
836 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
837 state->crtc_w, state->crtc_h,
838 state->crtc_x, state->crtc_y);
839 return -ERANGE;
840 }
841
842 fb_width = state->fb->width << 16;
843 fb_height = state->fb->height << 16;
844
845 /* Make sure source coordinates are inside the fb. */
846 if (state->src_w > fb_width ||
847 state->src_x > fb_width - state->src_w ||
848 state->src_h > fb_height ||
849 state->src_y > fb_height - state->src_h) {
850 DRM_DEBUG_ATOMIC("Invalid source coordinates "
851 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
852 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
853 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
854 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
855 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10);
856 return -ENOSPC;
857 }
858
859 if (plane_switching_crtc(state->state, plane, state)) {
860 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
861 plane->base.id, plane->name);
862 return -EINVAL;
863 }
864
865 return 0;
866}
867
868/**
869 * drm_atomic_get_connector_state - get connector state
870 * @state: global atomic state object
871 * @connector: connector to get state object for
872 *
873 * This function returns the connector state for the given connector,
874 * allocating it if needed. It will also grab the relevant connector lock to
875 * make sure that the state is consistent.
876 *
877 * Returns:
878 *
879 * Either the allocated state or the error code encoded into the pointer. When
880 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
881 * entire atomic sequence must be restarted. All other errors are fatal.
882 */
883struct drm_connector_state *
884drm_atomic_get_connector_state(struct drm_atomic_state *state,
885 struct drm_connector *connector)
886{
887 int ret, index;
888 struct drm_mode_config *config = &connector->dev->mode_config;
889 struct drm_connector_state *connector_state;
890
891 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
892 if (ret)
893 return ERR_PTR(ret);
894
895 index = drm_connector_index(connector);
896
897 if (index >= state->num_connector) {
898 struct drm_connector **c;
899 struct drm_connector_state **cs;
900 int alloc = max(index + 1, config->num_connector);
901
902 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
903 if (!c)
904 return ERR_PTR(-ENOMEM);
905
906 state->connectors = c;
907 memset(&state->connectors[state->num_connector], 0,
908 sizeof(*state->connectors) * (alloc - state->num_connector));
909
910 cs = krealloc(state->connector_states, alloc * sizeof(*state->connector_states), GFP_KERNEL);
911 if (!cs)
912 return ERR_PTR(-ENOMEM);
913
914 state->connector_states = cs;
915 memset(&state->connector_states[state->num_connector], 0,
916 sizeof(*state->connector_states) * (alloc - state->num_connector));
917 state->num_connector = alloc;
918 }
919
920 if (state->connector_states[index])
921 return state->connector_states[index];
922
923 connector_state = connector->funcs->atomic_duplicate_state(connector);
924 if (!connector_state)
925 return ERR_PTR(-ENOMEM);
926
927 state->connector_states[index] = connector_state;
928 state->connectors[index] = connector;
929 connector_state->state = state;
930
931 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d] %p state to %p\n",
932 connector->base.id, connector_state, state);
933
934 if (connector_state->crtc) {
935 struct drm_crtc_state *crtc_state;
936
937 crtc_state = drm_atomic_get_crtc_state(state,
938 connector_state->crtc);
939 if (IS_ERR(crtc_state))
940 return ERR_CAST(crtc_state);
941 }
942
943 return connector_state;
944}
945EXPORT_SYMBOL(drm_atomic_get_connector_state);
946
947/**
948 * drm_atomic_connector_set_property - set property on connector.
949 * @connector: the drm connector to set a property on
950 * @state: the state object to update with the new property value
951 * @property: the property to set
952 * @val: the new property value
953 *
954 * Use this instead of calling connector->atomic_set_property directly.
955 * This function handles generic/core properties and calls out to
956 * driver's ->atomic_set_property() for driver properties. To ensure
957 * consistent behavior you must call this function rather than the
958 * driver hook directly.
959 *
960 * RETURNS:
961 * Zero on success, error code on failure
962 */
963int drm_atomic_connector_set_property(struct drm_connector *connector,
964 struct drm_connector_state *state, struct drm_property *property,
965 uint64_t val)
966{
967 struct drm_device *dev = connector->dev;
968 struct drm_mode_config *config = &dev->mode_config;
969
970 if (property == config->prop_crtc_id) {
971 struct drm_crtc *crtc = drm_crtc_find(dev, val);
972 return drm_atomic_set_crtc_for_connector(state, crtc);
973 } else if (property == config->dpms_property) {
974 /* setting DPMS property requires special handling, which
975 * is done in legacy setprop path for us. Disallow (for
976 * now?) atomic writes to DPMS property:
977 */
978 return -EINVAL;
979 } else if (connector->funcs->atomic_set_property) {
980 return connector->funcs->atomic_set_property(connector,
981 state, property, val);
982 } else {
983 return -EINVAL;
984 }
985}
986EXPORT_SYMBOL(drm_atomic_connector_set_property);
987
988/**
989 * drm_atomic_connector_get_property - get property value from connector state
990 * @connector: the drm connector to set a property on
991 * @state: the state object to get the property value from
992 * @property: the property to set
993 * @val: return location for the property value
994 *
995 * This function handles generic/core properties and calls out to
996 * driver's ->atomic_get_property() for driver properties. To ensure
997 * consistent behavior you must call this function rather than the
998 * driver hook directly.
999 *
1000 * RETURNS:
1001 * Zero on success, error code on failure
1002 */
1003static int
1004drm_atomic_connector_get_property(struct drm_connector *connector,
1005 const struct drm_connector_state *state,
1006 struct drm_property *property, uint64_t *val)
1007{
1008 struct drm_device *dev = connector->dev;
1009 struct drm_mode_config *config = &dev->mode_config;
1010
1011 if (property == config->prop_crtc_id) {
1012 *val = (state->crtc) ? state->crtc->base.id : 0;
1013 } else if (property == config->dpms_property) {
1014 *val = connector->dpms;
1015 } else if (connector->funcs->atomic_get_property) {
1016 return connector->funcs->atomic_get_property(connector,
1017 state, property, val);
1018 } else {
1019 return -EINVAL;
1020 }
1021
1022 return 0;
1023}
1024
1025int drm_atomic_get_property(struct drm_mode_object *obj,
1026 struct drm_property *property, uint64_t *val)
1027{
1028 struct drm_device *dev = property->dev;
1029 int ret;
1030
1031 switch (obj->type) {
1032 case DRM_MODE_OBJECT_CONNECTOR: {
1033 struct drm_connector *connector = obj_to_connector(obj);
1034 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1035 ret = drm_atomic_connector_get_property(connector,
1036 connector->state, property, val);
1037 break;
1038 }
1039 case DRM_MODE_OBJECT_CRTC: {
1040 struct drm_crtc *crtc = obj_to_crtc(obj);
1041 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1042 ret = drm_atomic_crtc_get_property(crtc,
1043 crtc->state, property, val);
1044 break;
1045 }
1046 case DRM_MODE_OBJECT_PLANE: {
1047 struct drm_plane *plane = obj_to_plane(obj);
1048 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1049 ret = drm_atomic_plane_get_property(plane,
1050 plane->state, property, val);
1051 break;
1052 }
1053 default:
1054 ret = -EINVAL;
1055 break;
1056 }
1057
1058 return ret;
1059}
1060
1061/**
1062 * drm_atomic_set_crtc_for_plane - set crtc for plane
1063 * @plane_state: the plane whose incoming state to update
1064 * @crtc: crtc to use for the plane
1065 *
1066 * Changing the assigned crtc for a plane requires us to grab the lock and state
1067 * for the new crtc, as needed. This function takes care of all these details
1068 * besides updating the pointer in the state object itself.
1069 *
1070 * Returns:
1071 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1072 * then the w/w mutex code has detected a deadlock and the entire atomic
1073 * sequence must be restarted. All other errors are fatal.
1074 */
1075int
1076drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1077 struct drm_crtc *crtc)
1078{
1079 struct drm_plane *plane = plane_state->plane;
1080 struct drm_crtc_state *crtc_state;
1081
1082 if (plane_state->crtc) {
1083 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1084 plane_state->crtc);
1085 if (WARN_ON(IS_ERR(crtc_state)))
1086 return PTR_ERR(crtc_state);
1087
1088 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
1089 }
1090
1091 plane_state->crtc = crtc;
1092
1093 if (crtc) {
1094 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1095 crtc);
1096 if (IS_ERR(crtc_state))
1097 return PTR_ERR(crtc_state);
1098 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
1099 }
1100
1101 if (crtc)
1102 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1103 plane_state, crtc->base.id, crtc->name);
1104 else
1105 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1106 plane_state);
1107
1108 return 0;
1109}
1110EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1111
1112/**
1113 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1114 * @plane_state: atomic state object for the plane
1115 * @fb: fb to use for the plane
1116 *
1117 * Changing the assigned framebuffer for a plane requires us to grab a reference
1118 * to the new fb and drop the reference to the old fb, if there is one. This
1119 * function takes care of all these details besides updating the pointer in the
1120 * state object itself.
1121 */
1122void
1123drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1124 struct drm_framebuffer *fb)
1125{
1126 if (plane_state->fb)
1127 drm_framebuffer_unreference(plane_state->fb);
1128 if (fb)
1129 drm_framebuffer_reference(fb);
1130 plane_state->fb = fb;
1131
1132 if (fb)
1133 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1134 fb->base.id, plane_state);
1135 else
1136 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1137 plane_state);
1138}
1139EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1140
1141/**
1142 * drm_atomic_set_crtc_for_connector - set crtc for connector
1143 * @conn_state: atomic state object for the connector
1144 * @crtc: crtc to use for the connector
1145 *
1146 * Changing the assigned crtc for a connector requires us to grab the lock and
1147 * state for the new crtc, as needed. This function takes care of all these
1148 * details besides updating the pointer in the state object itself.
1149 *
1150 * Returns:
1151 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1152 * then the w/w mutex code has detected a deadlock and the entire atomic
1153 * sequence must be restarted. All other errors are fatal.
1154 */
1155int
1156drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1157 struct drm_crtc *crtc)
1158{
1159 struct drm_crtc_state *crtc_state;
1160
1161 if (conn_state->crtc && conn_state->crtc != crtc) {
1162 crtc_state = drm_atomic_get_existing_crtc_state(conn_state->state,
1163 conn_state->crtc);
1164
1165 crtc_state->connector_mask &=
1166 ~(1 << drm_connector_index(conn_state->connector));
1167 }
1168
1169 if (crtc) {
1170 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1171 if (IS_ERR(crtc_state))
1172 return PTR_ERR(crtc_state);
1173
1174 crtc_state->connector_mask |=
1175 1 << drm_connector_index(conn_state->connector);
1176 }
1177
1178 conn_state->crtc = crtc;
1179
1180 if (crtc)
1181 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1182 conn_state, crtc->base.id, crtc->name);
1183 else
1184 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1185 conn_state);
1186
1187 return 0;
1188}
1189EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1190
1191/**
1192 * drm_atomic_add_affected_connectors - add connectors for crtc
1193 * @state: atomic state
1194 * @crtc: DRM crtc
1195 *
1196 * This function walks the current configuration and adds all connectors
1197 * currently using @crtc to the atomic configuration @state. Note that this
1198 * function must acquire the connection mutex. This can potentially cause
1199 * unneeded seralization if the update is just for the planes on one crtc. Hence
1200 * drivers and helpers should only call this when really needed (e.g. when a
1201 * full modeset needs to happen due to some change).
1202 *
1203 * Returns:
1204 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1205 * then the w/w mutex code has detected a deadlock and the entire atomic
1206 * sequence must be restarted. All other errors are fatal.
1207 */
1208int
1209drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1210 struct drm_crtc *crtc)
1211{
1212 struct drm_mode_config *config = &state->dev->mode_config;
1213 struct drm_connector *connector;
1214 struct drm_connector_state *conn_state;
1215 int ret;
1216
1217 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1218 if (ret)
1219 return ret;
1220
1221 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1222 crtc->base.id, crtc->name, state);
1223
1224 /*
1225 * Changed connectors are already in @state, so only need to look at the
1226 * current configuration.
1227 */
1228 drm_for_each_connector(connector, state->dev) {
1229 if (connector->state->crtc != crtc)
1230 continue;
1231
1232 conn_state = drm_atomic_get_connector_state(state, connector);
1233 if (IS_ERR(conn_state))
1234 return PTR_ERR(conn_state);
1235 }
1236
1237 return 0;
1238}
1239EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1240
1241/**
1242 * drm_atomic_add_affected_planes - add planes for crtc
1243 * @state: atomic state
1244 * @crtc: DRM crtc
1245 *
1246 * This function walks the current configuration and adds all planes
1247 * currently used by @crtc to the atomic configuration @state. This is useful
1248 * when an atomic commit also needs to check all currently enabled plane on
1249 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1250 * to avoid special code to force-enable all planes.
1251 *
1252 * Since acquiring a plane state will always also acquire the w/w mutex of the
1253 * current CRTC for that plane (if there is any) adding all the plane states for
1254 * a CRTC will not reduce parallism of atomic updates.
1255 *
1256 * Returns:
1257 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1258 * then the w/w mutex code has detected a deadlock and the entire atomic
1259 * sequence must be restarted. All other errors are fatal.
1260 */
1261int
1262drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1263 struct drm_crtc *crtc)
1264{
1265 struct drm_plane *plane;
1266
1267 WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc));
1268
1269 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1270 struct drm_plane_state *plane_state =
1271 drm_atomic_get_plane_state(state, plane);
1272
1273 if (IS_ERR(plane_state))
1274 return PTR_ERR(plane_state);
1275 }
1276 return 0;
1277}
1278EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1279
1280/**
1281 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls
1282 * @state: atomic state
1283 *
1284 * This function should be used by legacy entry points which don't understand
1285 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after
1286 * the slowpath completed.
1287 */
1288void drm_atomic_legacy_backoff(struct drm_atomic_state *state)
1289{
1290 int ret;
1291
1292retry:
1293 drm_modeset_backoff(state->acquire_ctx);
1294
1295 ret = drm_modeset_lock_all_ctx(state->dev, state->acquire_ctx);
1296 if (ret)
1297 goto retry;
1298}
1299EXPORT_SYMBOL(drm_atomic_legacy_backoff);
1300
1301/**
1302 * drm_atomic_check_only - check whether a given config would work
1303 * @state: atomic configuration to check
1304 *
1305 * Note that this function can return -EDEADLK if the driver needed to acquire
1306 * more locks but encountered a deadlock. The caller must then do the usual w/w
1307 * backoff dance and restart. All other errors are fatal.
1308 *
1309 * Returns:
1310 * 0 on success, negative error code on failure.
1311 */
1312int drm_atomic_check_only(struct drm_atomic_state *state)
1313{
1314 struct drm_device *dev = state->dev;
1315 struct drm_mode_config *config = &dev->mode_config;
1316 struct drm_plane *plane;
1317 struct drm_plane_state *plane_state;
1318 struct drm_crtc *crtc;
1319 struct drm_crtc_state *crtc_state;
1320 int i, ret = 0;
1321
1322 DRM_DEBUG_ATOMIC("checking %p\n", state);
1323
1324 for_each_plane_in_state(state, plane, plane_state, i) {
1325 ret = drm_atomic_plane_check(plane, plane_state);
1326 if (ret) {
1327 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1328 plane->base.id, plane->name);
1329 return ret;
1330 }
1331 }
1332
1333 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1334 ret = drm_atomic_crtc_check(crtc, crtc_state);
1335 if (ret) {
1336 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1337 crtc->base.id, crtc->name);
1338 return ret;
1339 }
1340 }
1341
1342 if (config->funcs->atomic_check)
1343 ret = config->funcs->atomic_check(state->dev, state);
1344
1345 if (!state->allow_modeset) {
1346 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1347 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1348 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1349 crtc->base.id, crtc->name);
1350 return -EINVAL;
1351 }
1352 }
1353 }
1354
1355 return ret;
1356}
1357EXPORT_SYMBOL(drm_atomic_check_only);
1358
1359/**
1360 * drm_atomic_commit - commit configuration atomically
1361 * @state: atomic configuration to check
1362 *
1363 * Note that this function can return -EDEADLK if the driver needed to acquire
1364 * more locks but encountered a deadlock. The caller must then do the usual w/w
1365 * backoff dance and restart. All other errors are fatal.
1366 *
1367 * Also note that on successful execution ownership of @state is transferred
1368 * from the caller of this function to the function itself. The caller must not
1369 * free or in any other way access @state. If the function fails then the caller
1370 * must clean up @state itself.
1371 *
1372 * Returns:
1373 * 0 on success, negative error code on failure.
1374 */
1375int drm_atomic_commit(struct drm_atomic_state *state)
1376{
1377 struct drm_mode_config *config = &state->dev->mode_config;
1378 int ret;
1379
1380 ret = drm_atomic_check_only(state);
1381 if (ret)
1382 return ret;
1383
1384 DRM_DEBUG_ATOMIC("commiting %p\n", state);
1385
1386 return config->funcs->atomic_commit(state->dev, state, false);
1387}
1388EXPORT_SYMBOL(drm_atomic_commit);
1389
1390/**
1391 * drm_atomic_async_commit - atomic&async configuration commit
1392 * @state: atomic configuration to check
1393 *
1394 * Note that this function can return -EDEADLK if the driver needed to acquire
1395 * more locks but encountered a deadlock. The caller must then do the usual w/w
1396 * backoff dance and restart. All other errors are fatal.
1397 *
1398 * Also note that on successful execution ownership of @state is transferred
1399 * from the caller of this function to the function itself. The caller must not
1400 * free or in any other way access @state. If the function fails then the caller
1401 * must clean up @state itself.
1402 *
1403 * Returns:
1404 * 0 on success, negative error code on failure.
1405 */
1406int drm_atomic_async_commit(struct drm_atomic_state *state)
1407{
1408 struct drm_mode_config *config = &state->dev->mode_config;
1409 int ret;
1410
1411 ret = drm_atomic_check_only(state);
1412 if (ret)
1413 return ret;
1414
1415 DRM_DEBUG_ATOMIC("commiting %p asynchronously\n", state);
1416
1417 return config->funcs->atomic_commit(state->dev, state, true);
1418}
1419EXPORT_SYMBOL(drm_atomic_async_commit);
1420
1421/*
1422 * The big monstor ioctl
1423 */
1424
1425static struct drm_pending_vblank_event *create_vblank_event(
1426 struct drm_device *dev, struct drm_file *file_priv, uint64_t user_data)
1427{
1428 struct drm_pending_vblank_event *e = NULL;
1429 int ret;
1430
1431 e = kzalloc(sizeof *e, GFP_KERNEL);
1432 if (!e)
1433 return NULL;
1434
1435 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1436 e->event.base.length = sizeof(e->event);
1437 e->event.user_data = user_data;
1438
1439 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
1440 if (ret) {
1441 kfree(e);
1442 return NULL;
1443 }
1444
1445 return e;
1446}
1447
1448static int atomic_set_prop(struct drm_atomic_state *state,
1449 struct drm_mode_object *obj, struct drm_property *prop,
1450 uint64_t prop_value)
1451{
1452 struct drm_mode_object *ref;
1453 int ret;
1454
1455 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1456 return -EINVAL;
1457
1458 switch (obj->type) {
1459 case DRM_MODE_OBJECT_CONNECTOR: {
1460 struct drm_connector *connector = obj_to_connector(obj);
1461 struct drm_connector_state *connector_state;
1462
1463 connector_state = drm_atomic_get_connector_state(state, connector);
1464 if (IS_ERR(connector_state)) {
1465 ret = PTR_ERR(connector_state);
1466 break;
1467 }
1468
1469 ret = drm_atomic_connector_set_property(connector,
1470 connector_state, prop, prop_value);
1471 break;
1472 }
1473 case DRM_MODE_OBJECT_CRTC: {
1474 struct drm_crtc *crtc = obj_to_crtc(obj);
1475 struct drm_crtc_state *crtc_state;
1476
1477 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1478 if (IS_ERR(crtc_state)) {
1479 ret = PTR_ERR(crtc_state);
1480 break;
1481 }
1482
1483 ret = drm_atomic_crtc_set_property(crtc,
1484 crtc_state, prop, prop_value);
1485 break;
1486 }
1487 case DRM_MODE_OBJECT_PLANE: {
1488 struct drm_plane *plane = obj_to_plane(obj);
1489 struct drm_plane_state *plane_state;
1490
1491 plane_state = drm_atomic_get_plane_state(state, plane);
1492 if (IS_ERR(plane_state)) {
1493 ret = PTR_ERR(plane_state);
1494 break;
1495 }
1496
1497 ret = drm_atomic_plane_set_property(plane,
1498 plane_state, prop, prop_value);
1499 break;
1500 }
1501 default:
1502 ret = -EINVAL;
1503 break;
1504 }
1505
1506 drm_property_change_valid_put(prop, ref);
1507 return ret;
1508}
1509
1510/**
1511 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers.
1512 *
1513 * @dev: drm device to check.
1514 * @plane_mask: plane mask for planes that were updated.
1515 * @ret: return value, can be -EDEADLK for a retry.
1516 *
1517 * Before doing an update plane->old_fb is set to plane->fb,
1518 * but before dropping the locks old_fb needs to be set to NULL
1519 * and plane->fb updated. This is a common operation for each
1520 * atomic update, so this call is split off as a helper.
1521 */
1522void drm_atomic_clean_old_fb(struct drm_device *dev,
1523 unsigned plane_mask,
1524 int ret)
1525{
1526 struct drm_plane *plane;
1527
1528 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
1529 * locks (ie. while it is still safe to deref plane->state). We
1530 * need to do this here because the driver entry points cannot
1531 * distinguish between legacy and atomic ioctls.
1532 */
1533 drm_for_each_plane_mask(plane, dev, plane_mask) {
1534 if (ret == 0) {
1535 struct drm_framebuffer *new_fb = plane->state->fb;
1536 if (new_fb)
1537 drm_framebuffer_reference(new_fb);
1538 plane->fb = new_fb;
1539 plane->crtc = plane->state->crtc;
1540
1541 if (plane->old_fb)
1542 drm_framebuffer_unreference(plane->old_fb);
1543 }
1544 plane->old_fb = NULL;
1545 }
1546}
1547EXPORT_SYMBOL(drm_atomic_clean_old_fb);
1548
1549int drm_mode_atomic_ioctl(struct drm_device *dev,
1550 void *data, struct drm_file *file_priv)
1551{
1552 struct drm_mode_atomic *arg = data;
1553 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1554 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1555 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1556 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1557 unsigned int copied_objs, copied_props;
1558 struct drm_atomic_state *state;
1559 struct drm_modeset_acquire_ctx ctx;
1560 struct drm_plane *plane;
1561 struct drm_crtc *crtc;
1562 struct drm_crtc_state *crtc_state;
1563 unsigned plane_mask;
1564 int ret = 0;
1565 unsigned int i, j;
1566
1567 /* disallow for drivers not supporting atomic: */
1568 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1569 return -EINVAL;
1570
1571 /* disallow for userspace that has not enabled atomic cap (even
1572 * though this may be a bit overkill, since legacy userspace
1573 * wouldn't know how to call this ioctl)
1574 */
1575 if (!file_priv->atomic)
1576 return -EINVAL;
1577
1578 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
1579 return -EINVAL;
1580
1581 if (arg->reserved)
1582 return -EINVAL;
1583
1584 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
1585 !dev->mode_config.async_page_flip)
1586 return -EINVAL;
1587
1588 /* can't test and expect an event at the same time. */
1589 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1590 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1591 return -EINVAL;
1592
1593 drm_modeset_acquire_init(&ctx, 0);
1594
1595 state = drm_atomic_state_alloc(dev);
1596 if (!state)
1597 return -ENOMEM;
1598
1599 state->acquire_ctx = &ctx;
1600 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1601
1602retry:
1603 plane_mask = 0;
1604 copied_objs = 0;
1605 copied_props = 0;
1606
1607 for (i = 0; i < arg->count_objs; i++) {
1608 uint32_t obj_id, count_props;
1609 struct drm_mode_object *obj;
1610
1611 if (get_user(obj_id, objs_ptr + copied_objs)) {
1612 ret = -EFAULT;
1613 goto out;
1614 }
1615
1616 obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY);
1617 if (!obj || !obj->properties) {
1618 ret = -ENOENT;
1619 goto out;
1620 }
1621
1622 if (get_user(count_props, count_props_ptr + copied_objs)) {
1623 ret = -EFAULT;
1624 goto out;
1625 }
1626
1627 copied_objs++;
1628
1629 for (j = 0; j < count_props; j++) {
1630 uint32_t prop_id;
1631 uint64_t prop_value;
1632 struct drm_property *prop;
1633
1634 if (get_user(prop_id, props_ptr + copied_props)) {
1635 ret = -EFAULT;
1636 goto out;
1637 }
1638
1639 prop = drm_property_find(dev, prop_id);
1640 if (!prop) {
1641 ret = -ENOENT;
1642 goto out;
1643 }
1644
1645 if (copy_from_user(&prop_value,
1646 prop_values_ptr + copied_props,
1647 sizeof(prop_value))) {
1648 ret = -EFAULT;
1649 goto out;
1650 }
1651
1652 ret = atomic_set_prop(state, obj, prop, prop_value);
1653 if (ret)
1654 goto out;
1655
1656 copied_props++;
1657 }
1658
1659 if (obj->type == DRM_MODE_OBJECT_PLANE && count_props &&
1660 !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) {
1661 plane = obj_to_plane(obj);
1662 plane_mask |= (1 << drm_plane_index(plane));
1663 plane->old_fb = plane->fb;
1664 }
1665 }
1666
1667 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1668 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1669 struct drm_pending_vblank_event *e;
1670
1671 e = create_vblank_event(dev, file_priv, arg->user_data);
1672 if (!e) {
1673 ret = -ENOMEM;
1674 goto out;
1675 }
1676
1677 crtc_state->event = e;
1678 }
1679 }
1680
1681 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1682 /*
1683 * Unlike commit, check_only does not clean up state.
1684 * Below we call drm_atomic_state_free for it.
1685 */
1686 ret = drm_atomic_check_only(state);
1687 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1688 ret = drm_atomic_async_commit(state);
1689 } else {
1690 ret = drm_atomic_commit(state);
1691 }
1692
1693out:
1694 drm_atomic_clean_old_fb(dev, plane_mask, ret);
1695
1696 if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1697 /*
1698 * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive,
1699 * if they weren't, this code should be called on success
1700 * for TEST_ONLY too.
1701 */
1702
1703 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1704 if (!crtc_state->event)
1705 continue;
1706
1707 drm_event_cancel_free(dev, &crtc_state->event->base);
1708 }
1709 }
1710
1711 if (ret == -EDEADLK) {
1712 drm_atomic_state_clear(state);
1713 drm_modeset_backoff(&ctx);
1714 goto retry;
1715 }
1716
1717 if (ret || arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
1718 drm_atomic_state_free(state);
1719
1720 drm_modeset_drop_locks(&ctx);
1721 drm_modeset_acquire_fini(&ctx);
1722
1723 return ret;
1724}