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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 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Rob Clark <robdclark@gmail.com>
26 * Daniel Vetter <daniel.vetter@ffwll.ch>
27 */
28
29
30#include <linux/sync_file.h>
31
32#include <drm/drm_atomic.h>
33#include <drm/drm_atomic_uapi.h>
34#include <drm/drm_blend.h>
35#include <drm/drm_bridge.h>
36#include <drm/drm_debugfs.h>
37#include <drm/drm_device.h>
38#include <drm/drm_drv.h>
39#include <drm/drm_file.h>
40#include <drm/drm_fourcc.h>
41#include <drm/drm_framebuffer.h>
42#include <drm/drm_mode.h>
43#include <drm/drm_print.h>
44#include <drm/drm_writeback.h>
45
46#include "drm_crtc_internal.h"
47#include "drm_internal.h"
48
49void __drm_crtc_commit_free(struct kref *kref)
50{
51 struct drm_crtc_commit *commit =
52 container_of(kref, struct drm_crtc_commit, ref);
53
54 kfree(commit);
55}
56EXPORT_SYMBOL(__drm_crtc_commit_free);
57
58/**
59 * drm_crtc_commit_wait - Waits for a commit to complete
60 * @commit: &drm_crtc_commit to wait for
61 *
62 * Waits for a given &drm_crtc_commit to be programmed into the
63 * hardware and flipped to.
64 *
65 * Returns:
66 * 0 on success, a negative error code otherwise.
67 */
68int drm_crtc_commit_wait(struct drm_crtc_commit *commit)
69{
70 unsigned long timeout = 10 * HZ;
71 int ret;
72
73 if (!commit)
74 return 0;
75
76 ret = wait_for_completion_timeout(&commit->hw_done, timeout);
77 if (!ret) {
78 drm_err(commit->crtc->dev, "hw_done timed out\n");
79 return -ETIMEDOUT;
80 }
81
82 /*
83 * Currently no support for overwriting flips, hence
84 * stall for previous one to execute completely.
85 */
86 ret = wait_for_completion_timeout(&commit->flip_done, timeout);
87 if (!ret) {
88 drm_err(commit->crtc->dev, "flip_done timed out\n");
89 return -ETIMEDOUT;
90 }
91
92 return 0;
93}
94EXPORT_SYMBOL(drm_crtc_commit_wait);
95
96/**
97 * drm_atomic_state_default_release -
98 * release memory initialized by drm_atomic_state_init
99 * @state: atomic state
100 *
101 * Free all the memory allocated by drm_atomic_state_init.
102 * This should only be used by drivers which are still subclassing
103 * &drm_atomic_state and haven't switched to &drm_private_state yet.
104 */
105void drm_atomic_state_default_release(struct drm_atomic_state *state)
106{
107 kfree(state->connectors);
108 kfree(state->crtcs);
109 kfree(state->planes);
110 kfree(state->private_objs);
111}
112EXPORT_SYMBOL(drm_atomic_state_default_release);
113
114/**
115 * drm_atomic_state_init - init new atomic state
116 * @dev: DRM device
117 * @state: atomic state
118 *
119 * Default implementation for filling in a new atomic state.
120 * This should only be used by drivers which are still subclassing
121 * &drm_atomic_state and haven't switched to &drm_private_state yet.
122 */
123int
124drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
125{
126 kref_init(&state->ref);
127
128 /* TODO legacy paths should maybe do a better job about
129 * setting this appropriately?
130 */
131 state->allow_modeset = true;
132
133 state->crtcs = kcalloc(dev->mode_config.num_crtc,
134 sizeof(*state->crtcs), GFP_KERNEL);
135 if (!state->crtcs)
136 goto fail;
137 state->planes = kcalloc(dev->mode_config.num_total_plane,
138 sizeof(*state->planes), GFP_KERNEL);
139 if (!state->planes)
140 goto fail;
141
142 /*
143 * Because drm_atomic_state can be committed asynchronously we need our
144 * own reference and cannot rely on the on implied by drm_file in the
145 * ioctl call.
146 */
147 drm_dev_get(dev);
148 state->dev = dev;
149
150 drm_dbg_atomic(dev, "Allocated atomic state %p\n", state);
151
152 return 0;
153fail:
154 drm_atomic_state_default_release(state);
155 return -ENOMEM;
156}
157EXPORT_SYMBOL(drm_atomic_state_init);
158
159/**
160 * drm_atomic_state_alloc - allocate atomic state
161 * @dev: DRM device
162 *
163 * This allocates an empty atomic state to track updates.
164 */
165struct drm_atomic_state *
166drm_atomic_state_alloc(struct drm_device *dev)
167{
168 struct drm_mode_config *config = &dev->mode_config;
169
170 if (!config->funcs->atomic_state_alloc) {
171 struct drm_atomic_state *state;
172
173 state = kzalloc(sizeof(*state), GFP_KERNEL);
174 if (!state)
175 return NULL;
176 if (drm_atomic_state_init(dev, state) < 0) {
177 kfree(state);
178 return NULL;
179 }
180 return state;
181 }
182
183 return config->funcs->atomic_state_alloc(dev);
184}
185EXPORT_SYMBOL(drm_atomic_state_alloc);
186
187/**
188 * drm_atomic_state_default_clear - clear base atomic state
189 * @state: atomic state
190 *
191 * Default implementation for clearing atomic state.
192 * This should only be used by drivers which are still subclassing
193 * &drm_atomic_state and haven't switched to &drm_private_state yet.
194 */
195void drm_atomic_state_default_clear(struct drm_atomic_state *state)
196{
197 struct drm_device *dev = state->dev;
198 struct drm_mode_config *config = &dev->mode_config;
199 int i;
200
201 drm_dbg_atomic(dev, "Clearing atomic state %p\n", state);
202
203 for (i = 0; i < state->num_connector; i++) {
204 struct drm_connector *connector = state->connectors[i].ptr;
205
206 if (!connector)
207 continue;
208
209 connector->funcs->atomic_destroy_state(connector,
210 state->connectors[i].state);
211 state->connectors[i].ptr = NULL;
212 state->connectors[i].state = NULL;
213 state->connectors[i].old_state = NULL;
214 state->connectors[i].new_state = NULL;
215 drm_connector_put(connector);
216 }
217
218 for (i = 0; i < config->num_crtc; i++) {
219 struct drm_crtc *crtc = state->crtcs[i].ptr;
220
221 if (!crtc)
222 continue;
223
224 crtc->funcs->atomic_destroy_state(crtc,
225 state->crtcs[i].state);
226
227 state->crtcs[i].ptr = NULL;
228 state->crtcs[i].state = NULL;
229 state->crtcs[i].old_state = NULL;
230 state->crtcs[i].new_state = NULL;
231
232 if (state->crtcs[i].commit) {
233 drm_crtc_commit_put(state->crtcs[i].commit);
234 state->crtcs[i].commit = NULL;
235 }
236 }
237
238 for (i = 0; i < config->num_total_plane; i++) {
239 struct drm_plane *plane = state->planes[i].ptr;
240
241 if (!plane)
242 continue;
243
244 plane->funcs->atomic_destroy_state(plane,
245 state->planes[i].state);
246 state->planes[i].ptr = NULL;
247 state->planes[i].state = NULL;
248 state->planes[i].old_state = NULL;
249 state->planes[i].new_state = NULL;
250 }
251
252 for (i = 0; i < state->num_private_objs; i++) {
253 struct drm_private_obj *obj = state->private_objs[i].ptr;
254
255 obj->funcs->atomic_destroy_state(obj,
256 state->private_objs[i].state);
257 state->private_objs[i].ptr = NULL;
258 state->private_objs[i].state = NULL;
259 state->private_objs[i].old_state = NULL;
260 state->private_objs[i].new_state = NULL;
261 }
262 state->num_private_objs = 0;
263
264 if (state->fake_commit) {
265 drm_crtc_commit_put(state->fake_commit);
266 state->fake_commit = NULL;
267 }
268}
269EXPORT_SYMBOL(drm_atomic_state_default_clear);
270
271/**
272 * drm_atomic_state_clear - clear state object
273 * @state: atomic state
274 *
275 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
276 * all locks. So someone else could sneak in and change the current modeset
277 * configuration. Which means that all the state assembled in @state is no
278 * longer an atomic update to the current state, but to some arbitrary earlier
279 * state. Which could break assumptions the driver's
280 * &drm_mode_config_funcs.atomic_check likely relies on.
281 *
282 * Hence we must clear all cached state and completely start over, using this
283 * function.
284 */
285void drm_atomic_state_clear(struct drm_atomic_state *state)
286{
287 struct drm_device *dev = state->dev;
288 struct drm_mode_config *config = &dev->mode_config;
289
290 if (config->funcs->atomic_state_clear)
291 config->funcs->atomic_state_clear(state);
292 else
293 drm_atomic_state_default_clear(state);
294}
295EXPORT_SYMBOL(drm_atomic_state_clear);
296
297/**
298 * __drm_atomic_state_free - free all memory for an atomic state
299 * @ref: This atomic state to deallocate
300 *
301 * This frees all memory associated with an atomic state, including all the
302 * per-object state for planes, CRTCs and connectors.
303 */
304void __drm_atomic_state_free(struct kref *ref)
305{
306 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
307 struct drm_device *dev = state->dev;
308 struct drm_mode_config *config = &dev->mode_config;
309
310 drm_atomic_state_clear(state);
311
312 drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state);
313
314 if (config->funcs->atomic_state_free) {
315 config->funcs->atomic_state_free(state);
316 } else {
317 drm_atomic_state_default_release(state);
318 kfree(state);
319 }
320
321 drm_dev_put(dev);
322}
323EXPORT_SYMBOL(__drm_atomic_state_free);
324
325/**
326 * drm_atomic_get_crtc_state - get CRTC state
327 * @state: global atomic state object
328 * @crtc: CRTC to get state object for
329 *
330 * This function returns the CRTC state for the given CRTC, allocating it if
331 * needed. It will also grab the relevant CRTC lock to make sure that the state
332 * is consistent.
333 *
334 * WARNING: Drivers may only add new CRTC states to a @state if
335 * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit
336 * not created by userspace through an IOCTL call.
337 *
338 * Returns:
339 * Either the allocated state or the error code encoded into the pointer. When
340 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
341 * entire atomic sequence must be restarted. All other errors are fatal.
342 */
343struct drm_crtc_state *
344drm_atomic_get_crtc_state(struct drm_atomic_state *state,
345 struct drm_crtc *crtc)
346{
347 int ret, index = drm_crtc_index(crtc);
348 struct drm_crtc_state *crtc_state;
349
350 WARN_ON(!state->acquire_ctx);
351
352 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
353 if (crtc_state)
354 return crtc_state;
355
356 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
357 if (ret)
358 return ERR_PTR(ret);
359
360 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
361 if (!crtc_state)
362 return ERR_PTR(-ENOMEM);
363
364 state->crtcs[index].state = crtc_state;
365 state->crtcs[index].old_state = crtc->state;
366 state->crtcs[index].new_state = crtc_state;
367 state->crtcs[index].ptr = crtc;
368 crtc_state->state = state;
369
370 drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n",
371 crtc->base.id, crtc->name, crtc_state, state);
372
373 return crtc_state;
374}
375EXPORT_SYMBOL(drm_atomic_get_crtc_state);
376
377static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
378 const struct drm_crtc_state *new_crtc_state)
379{
380 struct drm_crtc *crtc = new_crtc_state->crtc;
381
382 /* NOTE: we explicitly don't enforce constraints such as primary
383 * layer covering entire screen, since that is something we want
384 * to allow (on hw that supports it). For hw that does not, it
385 * should be checked in driver's crtc->atomic_check() vfunc.
386 *
387 * TODO: Add generic modeset state checks once we support those.
388 */
389
390 if (new_crtc_state->active && !new_crtc_state->enable) {
391 drm_dbg_atomic(crtc->dev,
392 "[CRTC:%d:%s] active without enabled\n",
393 crtc->base.id, crtc->name);
394 return -EINVAL;
395 }
396
397 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
398 * as this is a kernel-internal detail that userspace should never
399 * be able to trigger.
400 */
401 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
402 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
403 drm_dbg_atomic(crtc->dev,
404 "[CRTC:%d:%s] enabled without mode blob\n",
405 crtc->base.id, crtc->name);
406 return -EINVAL;
407 }
408
409 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
410 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
411 drm_dbg_atomic(crtc->dev,
412 "[CRTC:%d:%s] disabled with mode blob\n",
413 crtc->base.id, crtc->name);
414 return -EINVAL;
415 }
416
417 /*
418 * Reject event generation for when a CRTC is off and stays off.
419 * It wouldn't be hard to implement this, but userspace has a track
420 * record of happily burning through 100% cpu (or worse, crash) when the
421 * display pipe is suspended. To avoid all that fun just reject updates
422 * that ask for events since likely that indicates a bug in the
423 * compositor's drawing loop. This is consistent with the vblank IOCTL
424 * and legacy page_flip IOCTL which also reject service on a disabled
425 * pipe.
426 */
427 if (new_crtc_state->event &&
428 !new_crtc_state->active && !old_crtc_state->active) {
429 drm_dbg_atomic(crtc->dev,
430 "[CRTC:%d:%s] requesting event but off\n",
431 crtc->base.id, crtc->name);
432 return -EINVAL;
433 }
434
435 return 0;
436}
437
438static void drm_atomic_crtc_print_state(struct drm_printer *p,
439 const struct drm_crtc_state *state)
440{
441 struct drm_crtc *crtc = state->crtc;
442
443 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
444 drm_printf(p, "\tenable=%d\n", state->enable);
445 drm_printf(p, "\tactive=%d\n", state->active);
446 drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
447 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
448 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
449 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
450 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
451 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
452 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
453 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
454 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
455 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
456
457 if (crtc->funcs->atomic_print_state)
458 crtc->funcs->atomic_print_state(p, state);
459}
460
461static int drm_atomic_connector_check(struct drm_connector *connector,
462 struct drm_connector_state *state)
463{
464 struct drm_crtc_state *crtc_state;
465 struct drm_writeback_job *writeback_job = state->writeback_job;
466 const struct drm_display_info *info = &connector->display_info;
467
468 state->max_bpc = info->bpc ? info->bpc : 8;
469 if (connector->max_bpc_property)
470 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
471
472 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
473 return 0;
474
475 if (writeback_job->fb && !state->crtc) {
476 drm_dbg_atomic(connector->dev,
477 "[CONNECTOR:%d:%s] framebuffer without CRTC\n",
478 connector->base.id, connector->name);
479 return -EINVAL;
480 }
481
482 if (state->crtc)
483 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
484 state->crtc);
485
486 if (writeback_job->fb && !crtc_state->active) {
487 drm_dbg_atomic(connector->dev,
488 "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
489 connector->base.id, connector->name,
490 state->crtc->base.id);
491 return -EINVAL;
492 }
493
494 if (!writeback_job->fb) {
495 if (writeback_job->out_fence) {
496 drm_dbg_atomic(connector->dev,
497 "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
498 connector->base.id, connector->name);
499 return -EINVAL;
500 }
501
502 drm_writeback_cleanup_job(writeback_job);
503 state->writeback_job = NULL;
504 }
505
506 return 0;
507}
508
509/**
510 * drm_atomic_get_plane_state - get plane state
511 * @state: global atomic state object
512 * @plane: plane to get state object for
513 *
514 * This function returns the plane state for the given plane, allocating it if
515 * needed. It will also grab the relevant plane lock to make sure that the state
516 * is consistent.
517 *
518 * Returns:
519 * Either the allocated state or the error code encoded into the pointer. When
520 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
521 * entire atomic sequence must be restarted. All other errors are fatal.
522 */
523struct drm_plane_state *
524drm_atomic_get_plane_state(struct drm_atomic_state *state,
525 struct drm_plane *plane)
526{
527 int ret, index = drm_plane_index(plane);
528 struct drm_plane_state *plane_state;
529
530 WARN_ON(!state->acquire_ctx);
531
532 /* the legacy pointers should never be set */
533 WARN_ON(plane->fb);
534 WARN_ON(plane->old_fb);
535 WARN_ON(plane->crtc);
536
537 plane_state = drm_atomic_get_existing_plane_state(state, plane);
538 if (plane_state)
539 return plane_state;
540
541 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
542 if (ret)
543 return ERR_PTR(ret);
544
545 plane_state = plane->funcs->atomic_duplicate_state(plane);
546 if (!plane_state)
547 return ERR_PTR(-ENOMEM);
548
549 state->planes[index].state = plane_state;
550 state->planes[index].ptr = plane;
551 state->planes[index].old_state = plane->state;
552 state->planes[index].new_state = plane_state;
553 plane_state->state = state;
554
555 drm_dbg_atomic(plane->dev, "Added [PLANE:%d:%s] %p state to %p\n",
556 plane->base.id, plane->name, plane_state, state);
557
558 if (plane_state->crtc) {
559 struct drm_crtc_state *crtc_state;
560
561 crtc_state = drm_atomic_get_crtc_state(state,
562 plane_state->crtc);
563 if (IS_ERR(crtc_state))
564 return ERR_CAST(crtc_state);
565 }
566
567 return plane_state;
568}
569EXPORT_SYMBOL(drm_atomic_get_plane_state);
570
571static bool
572plane_switching_crtc(const struct drm_plane_state *old_plane_state,
573 const struct drm_plane_state *new_plane_state)
574{
575 if (!old_plane_state->crtc || !new_plane_state->crtc)
576 return false;
577
578 if (old_plane_state->crtc == new_plane_state->crtc)
579 return false;
580
581 /* This could be refined, but currently there's no helper or driver code
582 * to implement direct switching of active planes nor userspace to take
583 * advantage of more direct plane switching without the intermediate
584 * full OFF state.
585 */
586 return true;
587}
588
589/**
590 * drm_atomic_plane_check - check plane state
591 * @old_plane_state: old plane state to check
592 * @new_plane_state: new plane state to check
593 *
594 * Provides core sanity checks for plane state.
595 *
596 * RETURNS:
597 * Zero on success, error code on failure
598 */
599static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
600 const struct drm_plane_state *new_plane_state)
601{
602 struct drm_plane *plane = new_plane_state->plane;
603 struct drm_crtc *crtc = new_plane_state->crtc;
604 const struct drm_framebuffer *fb = new_plane_state->fb;
605 unsigned int fb_width, fb_height;
606 struct drm_mode_rect *clips;
607 uint32_t num_clips;
608
609 /* either *both* CRTC and FB must be set, or neither */
610 if (crtc && !fb) {
611 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n",
612 plane->base.id, plane->name);
613 return -EINVAL;
614 } else if (fb && !crtc) {
615 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] FB set but no CRTC\n",
616 plane->base.id, plane->name);
617 return -EINVAL;
618 }
619
620 /* if disabled, we don't care about the rest of the state: */
621 if (!crtc)
622 return 0;
623
624 /* Check whether this plane is usable on this CRTC */
625 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
626 drm_dbg_atomic(plane->dev,
627 "Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
628 crtc->base.id, crtc->name,
629 plane->base.id, plane->name);
630 return -EINVAL;
631 }
632
633 /* Check whether this plane supports the fb pixel format. */
634 if (!drm_plane_has_format(plane, fb->format->format, fb->modifier)) {
635 drm_dbg_atomic(plane->dev,
636 "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
637 plane->base.id, plane->name,
638 &fb->format->format, fb->modifier);
639 return -EINVAL;
640 }
641
642 /* Give drivers some help against integer overflows */
643 if (new_plane_state->crtc_w > INT_MAX ||
644 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
645 new_plane_state->crtc_h > INT_MAX ||
646 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
647 drm_dbg_atomic(plane->dev,
648 "[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
649 plane->base.id, plane->name,
650 new_plane_state->crtc_w, new_plane_state->crtc_h,
651 new_plane_state->crtc_x, new_plane_state->crtc_y);
652 return -ERANGE;
653 }
654
655 fb_width = fb->width << 16;
656 fb_height = fb->height << 16;
657
658 /* Make sure source coordinates are inside the fb. */
659 if (new_plane_state->src_w > fb_width ||
660 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
661 new_plane_state->src_h > fb_height ||
662 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
663 drm_dbg_atomic(plane->dev,
664 "[PLANE:%d:%s] invalid source coordinates "
665 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
666 plane->base.id, plane->name,
667 new_plane_state->src_w >> 16,
668 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
669 new_plane_state->src_h >> 16,
670 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
671 new_plane_state->src_x >> 16,
672 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
673 new_plane_state->src_y >> 16,
674 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
675 fb->width, fb->height);
676 return -ENOSPC;
677 }
678
679 clips = __drm_plane_get_damage_clips(new_plane_state);
680 num_clips = drm_plane_get_damage_clips_count(new_plane_state);
681
682 /* Make sure damage clips are valid and inside the fb. */
683 while (num_clips > 0) {
684 if (clips->x1 >= clips->x2 ||
685 clips->y1 >= clips->y2 ||
686 clips->x1 < 0 ||
687 clips->y1 < 0 ||
688 clips->x2 > fb_width ||
689 clips->y2 > fb_height) {
690 drm_dbg_atomic(plane->dev,
691 "[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
692 plane->base.id, plane->name, clips->x1,
693 clips->y1, clips->x2, clips->y2);
694 return -EINVAL;
695 }
696 clips++;
697 num_clips--;
698 }
699
700 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
701 drm_dbg_atomic(plane->dev,
702 "[PLANE:%d:%s] switching CRTC directly\n",
703 plane->base.id, plane->name);
704 return -EINVAL;
705 }
706
707 return 0;
708}
709
710static void drm_atomic_plane_print_state(struct drm_printer *p,
711 const struct drm_plane_state *state)
712{
713 struct drm_plane *plane = state->plane;
714 struct drm_rect src = drm_plane_state_src(state);
715 struct drm_rect dest = drm_plane_state_dest(state);
716
717 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
718 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
719 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
720 if (state->fb)
721 drm_framebuffer_print_info(p, 2, state->fb);
722 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
723 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
724 drm_printf(p, "\trotation=%x\n", state->rotation);
725 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
726 drm_printf(p, "\tcolor-encoding=%s\n",
727 drm_get_color_encoding_name(state->color_encoding));
728 drm_printf(p, "\tcolor-range=%s\n",
729 drm_get_color_range_name(state->color_range));
730 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
731
732 if (plane->funcs->atomic_print_state)
733 plane->funcs->atomic_print_state(p, state);
734}
735
736/**
737 * DOC: handling driver private state
738 *
739 * Very often the DRM objects exposed to userspace in the atomic modeset api
740 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
741 * underlying hardware. Especially for any kind of shared resources (e.g. shared
742 * clocks, scaler units, bandwidth and fifo limits shared among a group of
743 * planes or CRTCs, and so on) it makes sense to model these as independent
744 * objects. Drivers then need to do similar state tracking and commit ordering for
745 * such private (since not exposed to userspace) objects as the atomic core and
746 * helpers already provide for connectors, planes and CRTCs.
747 *
748 * To make this easier on drivers the atomic core provides some support to track
749 * driver private state objects using struct &drm_private_obj, with the
750 * associated state struct &drm_private_state.
751 *
752 * Similar to userspace-exposed objects, private state structures can be
753 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care
754 * of locking, hence drivers should not have a need to call drm_modeset_lock()
755 * directly. Sequence of the actual hardware state commit is not handled,
756 * drivers might need to keep track of struct drm_crtc_commit within subclassed
757 * structure of &drm_private_state as necessary, e.g. similar to
758 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
759 *
760 * All private state structures contained in a &drm_atomic_state update can be
761 * iterated using for_each_oldnew_private_obj_in_state(),
762 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
763 * Drivers are recommended to wrap these for each type of driver private state
764 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
765 * least if they want to iterate over all objects of a given type.
766 *
767 * An earlier way to handle driver private state was by subclassing struct
768 * &drm_atomic_state. But since that encourages non-standard ways to implement
769 * the check/commit split atomic requires (by using e.g. "check and rollback or
770 * commit instead" of "duplicate state, check, then either commit or release
771 * duplicated state) it is deprecated in favour of using &drm_private_state.
772 */
773
774/**
775 * drm_atomic_private_obj_init - initialize private object
776 * @dev: DRM device this object will be attached to
777 * @obj: private object
778 * @state: initial private object state
779 * @funcs: pointer to the struct of function pointers that identify the object
780 * type
781 *
782 * Initialize the private object, which can be embedded into any
783 * driver private object that needs its own atomic state.
784 */
785void
786drm_atomic_private_obj_init(struct drm_device *dev,
787 struct drm_private_obj *obj,
788 struct drm_private_state *state,
789 const struct drm_private_state_funcs *funcs)
790{
791 memset(obj, 0, sizeof(*obj));
792
793 drm_modeset_lock_init(&obj->lock);
794
795 obj->state = state;
796 obj->funcs = funcs;
797 list_add_tail(&obj->head, &dev->mode_config.privobj_list);
798
799 state->obj = obj;
800}
801EXPORT_SYMBOL(drm_atomic_private_obj_init);
802
803/**
804 * drm_atomic_private_obj_fini - finalize private object
805 * @obj: private object
806 *
807 * Finalize the private object.
808 */
809void
810drm_atomic_private_obj_fini(struct drm_private_obj *obj)
811{
812 list_del(&obj->head);
813 obj->funcs->atomic_destroy_state(obj, obj->state);
814 drm_modeset_lock_fini(&obj->lock);
815}
816EXPORT_SYMBOL(drm_atomic_private_obj_fini);
817
818/**
819 * drm_atomic_get_private_obj_state - get private object state
820 * @state: global atomic state
821 * @obj: private object to get the state for
822 *
823 * This function returns the private object state for the given private object,
824 * allocating the state if needed. It will also grab the relevant private
825 * object lock to make sure that the state is consistent.
826 *
827 * RETURNS:
828 * Either the allocated state or the error code encoded into a pointer.
829 */
830struct drm_private_state *
831drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
832 struct drm_private_obj *obj)
833{
834 int index, num_objs, i, ret;
835 size_t size;
836 struct __drm_private_objs_state *arr;
837 struct drm_private_state *obj_state;
838
839 for (i = 0; i < state->num_private_objs; i++)
840 if (obj == state->private_objs[i].ptr)
841 return state->private_objs[i].state;
842
843 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
844 if (ret)
845 return ERR_PTR(ret);
846
847 num_objs = state->num_private_objs + 1;
848 size = sizeof(*state->private_objs) * num_objs;
849 arr = krealloc(state->private_objs, size, GFP_KERNEL);
850 if (!arr)
851 return ERR_PTR(-ENOMEM);
852
853 state->private_objs = arr;
854 index = state->num_private_objs;
855 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
856
857 obj_state = obj->funcs->atomic_duplicate_state(obj);
858 if (!obj_state)
859 return ERR_PTR(-ENOMEM);
860
861 state->private_objs[index].state = obj_state;
862 state->private_objs[index].old_state = obj->state;
863 state->private_objs[index].new_state = obj_state;
864 state->private_objs[index].ptr = obj;
865 obj_state->state = state;
866
867 state->num_private_objs = num_objs;
868
869 drm_dbg_atomic(state->dev,
870 "Added new private object %p state %p to %p\n",
871 obj, obj_state, state);
872
873 return obj_state;
874}
875EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
876
877/**
878 * drm_atomic_get_old_private_obj_state
879 * @state: global atomic state object
880 * @obj: private_obj to grab
881 *
882 * This function returns the old private object state for the given private_obj,
883 * or NULL if the private_obj is not part of the global atomic state.
884 */
885struct drm_private_state *
886drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state,
887 struct drm_private_obj *obj)
888{
889 int i;
890
891 for (i = 0; i < state->num_private_objs; i++)
892 if (obj == state->private_objs[i].ptr)
893 return state->private_objs[i].old_state;
894
895 return NULL;
896}
897EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
898
899/**
900 * drm_atomic_get_new_private_obj_state
901 * @state: global atomic state object
902 * @obj: private_obj to grab
903 *
904 * This function returns the new private object state for the given private_obj,
905 * or NULL if the private_obj is not part of the global atomic state.
906 */
907struct drm_private_state *
908drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state,
909 struct drm_private_obj *obj)
910{
911 int i;
912
913 for (i = 0; i < state->num_private_objs; i++)
914 if (obj == state->private_objs[i].ptr)
915 return state->private_objs[i].new_state;
916
917 return NULL;
918}
919EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
920
921/**
922 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
923 * @state: Atomic state
924 * @encoder: The encoder to fetch the connector state for
925 *
926 * This function finds and returns the connector that was connected to @encoder
927 * as specified by the @state.
928 *
929 * If there is no connector in @state which previously had @encoder connected to
930 * it, this function will return NULL. While this may seem like an invalid use
931 * case, it is sometimes useful to differentiate commits which had no prior
932 * connectors attached to @encoder vs ones that did (and to inspect their
933 * state). This is especially true in enable hooks because the pipeline has
934 * changed.
935 *
936 * Returns: The old connector connected to @encoder, or NULL if the encoder is
937 * not connected.
938 */
939struct drm_connector *
940drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state,
941 struct drm_encoder *encoder)
942{
943 struct drm_connector_state *conn_state;
944 struct drm_connector *connector;
945 unsigned int i;
946
947 for_each_old_connector_in_state(state, connector, conn_state, i) {
948 if (conn_state->best_encoder == encoder)
949 return connector;
950 }
951
952 return NULL;
953}
954EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
955
956/**
957 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
958 * @state: Atomic state
959 * @encoder: The encoder to fetch the connector state for
960 *
961 * This function finds and returns the connector that will be connected to
962 * @encoder as specified by the @state.
963 *
964 * If there is no connector in @state which will have @encoder connected to it,
965 * this function will return NULL. While this may seem like an invalid use case,
966 * it is sometimes useful to differentiate commits which have no connectors
967 * attached to @encoder vs ones that do (and to inspect their state). This is
968 * especially true in disable hooks because the pipeline will change.
969 *
970 * Returns: The new connector connected to @encoder, or NULL if the encoder is
971 * not connected.
972 */
973struct drm_connector *
974drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,
975 struct drm_encoder *encoder)
976{
977 struct drm_connector_state *conn_state;
978 struct drm_connector *connector;
979 unsigned int i;
980
981 for_each_new_connector_in_state(state, connector, conn_state, i) {
982 if (conn_state->best_encoder == encoder)
983 return connector;
984 }
985
986 return NULL;
987}
988EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
989
990/**
991 * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder
992 * @state: Atomic state
993 * @encoder: The encoder to fetch the crtc state for
994 *
995 * This function finds and returns the crtc that was connected to @encoder
996 * as specified by the @state.
997 *
998 * Returns: The old crtc connected to @encoder, or NULL if the encoder is
999 * not connected.
1000 */
1001struct drm_crtc *
1002drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_state *state,
1003 struct drm_encoder *encoder)
1004{
1005 struct drm_connector *connector;
1006 struct drm_connector_state *conn_state;
1007
1008 connector = drm_atomic_get_old_connector_for_encoder(state, encoder);
1009 if (!connector)
1010 return NULL;
1011
1012 conn_state = drm_atomic_get_old_connector_state(state, connector);
1013 if (!conn_state)
1014 return NULL;
1015
1016 return conn_state->crtc;
1017}
1018EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder);
1019
1020/**
1021 * drm_atomic_get_new_crtc_for_encoder - Get new crtc for an encoder
1022 * @state: Atomic state
1023 * @encoder: The encoder to fetch the crtc state for
1024 *
1025 * This function finds and returns the crtc that will be connected to @encoder
1026 * as specified by the @state.
1027 *
1028 * Returns: The new crtc connected to @encoder, or NULL if the encoder is
1029 * not connected.
1030 */
1031struct drm_crtc *
1032drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_state *state,
1033 struct drm_encoder *encoder)
1034{
1035 struct drm_connector *connector;
1036 struct drm_connector_state *conn_state;
1037
1038 connector = drm_atomic_get_new_connector_for_encoder(state, encoder);
1039 if (!connector)
1040 return NULL;
1041
1042 conn_state = drm_atomic_get_new_connector_state(state, connector);
1043 if (!conn_state)
1044 return NULL;
1045
1046 return conn_state->crtc;
1047}
1048EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder);
1049
1050/**
1051 * drm_atomic_get_connector_state - get connector state
1052 * @state: global atomic state object
1053 * @connector: connector to get state object for
1054 *
1055 * This function returns the connector state for the given connector,
1056 * allocating it if needed. It will also grab the relevant connector lock to
1057 * make sure that the state is consistent.
1058 *
1059 * Returns:
1060 * Either the allocated state or the error code encoded into the pointer. When
1061 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1062 * entire atomic sequence must be restarted. All other errors are fatal.
1063 */
1064struct drm_connector_state *
1065drm_atomic_get_connector_state(struct drm_atomic_state *state,
1066 struct drm_connector *connector)
1067{
1068 int ret, index;
1069 struct drm_mode_config *config = &connector->dev->mode_config;
1070 struct drm_connector_state *connector_state;
1071
1072 WARN_ON(!state->acquire_ctx);
1073
1074 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1075 if (ret)
1076 return ERR_PTR(ret);
1077
1078 index = drm_connector_index(connector);
1079
1080 if (index >= state->num_connector) {
1081 struct __drm_connnectors_state *c;
1082 int alloc = max(index + 1, config->num_connector);
1083
1084 c = krealloc_array(state->connectors, alloc,
1085 sizeof(*state->connectors), GFP_KERNEL);
1086 if (!c)
1087 return ERR_PTR(-ENOMEM);
1088
1089 state->connectors = c;
1090 memset(&state->connectors[state->num_connector], 0,
1091 sizeof(*state->connectors) * (alloc - state->num_connector));
1092
1093 state->num_connector = alloc;
1094 }
1095
1096 if (state->connectors[index].state)
1097 return state->connectors[index].state;
1098
1099 connector_state = connector->funcs->atomic_duplicate_state(connector);
1100 if (!connector_state)
1101 return ERR_PTR(-ENOMEM);
1102
1103 drm_connector_get(connector);
1104 state->connectors[index].state = connector_state;
1105 state->connectors[index].old_state = connector->state;
1106 state->connectors[index].new_state = connector_state;
1107 state->connectors[index].ptr = connector;
1108 connector_state->state = state;
1109
1110 drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n",
1111 connector->base.id, connector->name,
1112 connector_state, state);
1113
1114 if (connector_state->crtc) {
1115 struct drm_crtc_state *crtc_state;
1116
1117 crtc_state = drm_atomic_get_crtc_state(state,
1118 connector_state->crtc);
1119 if (IS_ERR(crtc_state))
1120 return ERR_CAST(crtc_state);
1121 }
1122
1123 return connector_state;
1124}
1125EXPORT_SYMBOL(drm_atomic_get_connector_state);
1126
1127static void drm_atomic_connector_print_state(struct drm_printer *p,
1128 const struct drm_connector_state *state)
1129{
1130 struct drm_connector *connector = state->connector;
1131
1132 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1133 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1134 drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1135 drm_printf(p, "\tinterlace_allowed=%d\n", connector->interlace_allowed);
1136 drm_printf(p, "\tycbcr_420_allowed=%d\n", connector->ycbcr_420_allowed);
1137 drm_printf(p, "\tmax_requested_bpc=%d\n", state->max_requested_bpc);
1138 drm_printf(p, "\tcolorspace=%s\n", drm_get_colorspace_name(state->colorspace));
1139
1140 if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
1141 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
1142 drm_printf(p, "\tbroadcast_rgb=%s\n",
1143 drm_hdmi_connector_get_broadcast_rgb_name(state->hdmi.broadcast_rgb));
1144 drm_printf(p, "\tis_limited_range=%c\n", state->hdmi.is_limited_range ? 'y' : 'n');
1145 drm_printf(p, "\toutput_bpc=%u\n", state->hdmi.output_bpc);
1146 drm_printf(p, "\toutput_format=%s\n",
1147 drm_hdmi_connector_get_output_format_name(state->hdmi.output_format));
1148 drm_printf(p, "\ttmds_char_rate=%llu\n", state->hdmi.tmds_char_rate);
1149 }
1150
1151 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1152 if (state->writeback_job && state->writeback_job->fb)
1153 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1154
1155 if (connector->funcs->atomic_print_state)
1156 connector->funcs->atomic_print_state(p, state);
1157}
1158
1159/**
1160 * drm_atomic_get_bridge_state - get bridge state
1161 * @state: global atomic state object
1162 * @bridge: bridge to get state object for
1163 *
1164 * This function returns the bridge state for the given bridge, allocating it
1165 * if needed. It will also grab the relevant bridge lock to make sure that the
1166 * state is consistent.
1167 *
1168 * Returns:
1169 * Either the allocated state or the error code encoded into the pointer. When
1170 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1171 * entire atomic sequence must be restarted.
1172 */
1173struct drm_bridge_state *
1174drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1175 struct drm_bridge *bridge)
1176{
1177 struct drm_private_state *obj_state;
1178
1179 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
1180 if (IS_ERR(obj_state))
1181 return ERR_CAST(obj_state);
1182
1183 return drm_priv_to_bridge_state(obj_state);
1184}
1185EXPORT_SYMBOL(drm_atomic_get_bridge_state);
1186
1187/**
1188 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
1189 * @state: global atomic state object
1190 * @bridge: bridge to grab
1191 *
1192 * This function returns the old bridge state for the given bridge, or NULL if
1193 * the bridge is not part of the global atomic state.
1194 */
1195struct drm_bridge_state *
1196drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,
1197 struct drm_bridge *bridge)
1198{
1199 struct drm_private_state *obj_state;
1200
1201 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
1202 if (!obj_state)
1203 return NULL;
1204
1205 return drm_priv_to_bridge_state(obj_state);
1206}
1207EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
1208
1209/**
1210 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
1211 * @state: global atomic state object
1212 * @bridge: bridge to grab
1213 *
1214 * This function returns the new bridge state for the given bridge, or NULL if
1215 * the bridge is not part of the global atomic state.
1216 */
1217struct drm_bridge_state *
1218drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state,
1219 struct drm_bridge *bridge)
1220{
1221 struct drm_private_state *obj_state;
1222
1223 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
1224 if (!obj_state)
1225 return NULL;
1226
1227 return drm_priv_to_bridge_state(obj_state);
1228}
1229EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
1230
1231/**
1232 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder
1233 * @state: atomic state
1234 * @encoder: DRM encoder
1235 *
1236 * This function adds all bridges attached to @encoder. This is needed to add
1237 * bridge states to @state and make them available when
1238 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),
1239 * &drm_bridge_funcs.atomic_enable(),
1240 * &drm_bridge_funcs.atomic_disable_post_disable() are called.
1241 *
1242 * Returns:
1243 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1244 * then the w/w mutex code has detected a deadlock and the entire atomic
1245 * sequence must be restarted. All other errors are fatal.
1246 */
1247int
1248drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
1249 struct drm_encoder *encoder)
1250{
1251 struct drm_bridge_state *bridge_state;
1252 struct drm_bridge *bridge;
1253
1254 if (!encoder)
1255 return 0;
1256
1257 drm_dbg_atomic(encoder->dev,
1258 "Adding all bridges for [encoder:%d:%s] to %p\n",
1259 encoder->base.id, encoder->name, state);
1260
1261 drm_for_each_bridge_in_chain(encoder, bridge) {
1262 /* Skip bridges that don't implement the atomic state hooks. */
1263 if (!bridge->funcs->atomic_duplicate_state)
1264 continue;
1265
1266 bridge_state = drm_atomic_get_bridge_state(state, bridge);
1267 if (IS_ERR(bridge_state))
1268 return PTR_ERR(bridge_state);
1269 }
1270
1271 return 0;
1272}
1273EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
1274
1275/**
1276 * drm_atomic_add_affected_connectors - add connectors for CRTC
1277 * @state: atomic state
1278 * @crtc: DRM CRTC
1279 *
1280 * This function walks the current configuration and adds all connectors
1281 * currently using @crtc to the atomic configuration @state. Note that this
1282 * function must acquire the connection mutex. This can potentially cause
1283 * unneeded serialization if the update is just for the planes on one CRTC. Hence
1284 * drivers and helpers should only call this when really needed (e.g. when a
1285 * full modeset needs to happen due to some change).
1286 *
1287 * Returns:
1288 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1289 * then the w/w mutex code has detected a deadlock and the entire atomic
1290 * sequence must be restarted. All other errors are fatal.
1291 */
1292int
1293drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1294 struct drm_crtc *crtc)
1295{
1296 struct drm_mode_config *config = &state->dev->mode_config;
1297 struct drm_connector *connector;
1298 struct drm_connector_state *conn_state;
1299 struct drm_connector_list_iter conn_iter;
1300 struct drm_crtc_state *crtc_state;
1301 int ret;
1302
1303 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1304 if (IS_ERR(crtc_state))
1305 return PTR_ERR(crtc_state);
1306
1307 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1308 if (ret)
1309 return ret;
1310
1311 drm_dbg_atomic(crtc->dev,
1312 "Adding all current connectors for [CRTC:%d:%s] to %p\n",
1313 crtc->base.id, crtc->name, state);
1314
1315 /*
1316 * Changed connectors are already in @state, so only need to look
1317 * at the connector_mask in crtc_state.
1318 */
1319 drm_connector_list_iter_begin(state->dev, &conn_iter);
1320 drm_for_each_connector_iter(connector, &conn_iter) {
1321 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1322 continue;
1323
1324 conn_state = drm_atomic_get_connector_state(state, connector);
1325 if (IS_ERR(conn_state)) {
1326 drm_connector_list_iter_end(&conn_iter);
1327 return PTR_ERR(conn_state);
1328 }
1329 }
1330 drm_connector_list_iter_end(&conn_iter);
1331
1332 return 0;
1333}
1334EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1335
1336/**
1337 * drm_atomic_add_affected_planes - add planes for CRTC
1338 * @state: atomic state
1339 * @crtc: DRM CRTC
1340 *
1341 * This function walks the current configuration and adds all planes
1342 * currently used by @crtc to the atomic configuration @state. This is useful
1343 * when an atomic commit also needs to check all currently enabled plane on
1344 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1345 * to avoid special code to force-enable all planes.
1346 *
1347 * Since acquiring a plane state will always also acquire the w/w mutex of the
1348 * current CRTC for that plane (if there is any) adding all the plane states for
1349 * a CRTC will not reduce parallelism of atomic updates.
1350 *
1351 * Returns:
1352 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1353 * then the w/w mutex code has detected a deadlock and the entire atomic
1354 * sequence must be restarted. All other errors are fatal.
1355 */
1356int
1357drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1358 struct drm_crtc *crtc)
1359{
1360 const struct drm_crtc_state *old_crtc_state =
1361 drm_atomic_get_old_crtc_state(state, crtc);
1362 struct drm_plane *plane;
1363
1364 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1365
1366 drm_dbg_atomic(crtc->dev,
1367 "Adding all current planes for [CRTC:%d:%s] to %p\n",
1368 crtc->base.id, crtc->name, state);
1369
1370 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1371 struct drm_plane_state *plane_state =
1372 drm_atomic_get_plane_state(state, plane);
1373
1374 if (IS_ERR(plane_state))
1375 return PTR_ERR(plane_state);
1376 }
1377 return 0;
1378}
1379EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1380
1381/**
1382 * drm_atomic_check_only - check whether a given config would work
1383 * @state: atomic configuration to check
1384 *
1385 * Note that this function can return -EDEADLK if the driver needed to acquire
1386 * more locks but encountered a deadlock. The caller must then do the usual w/w
1387 * backoff dance and restart. All other errors are fatal.
1388 *
1389 * Returns:
1390 * 0 on success, negative error code on failure.
1391 */
1392int drm_atomic_check_only(struct drm_atomic_state *state)
1393{
1394 struct drm_device *dev = state->dev;
1395 struct drm_mode_config *config = &dev->mode_config;
1396 struct drm_plane *plane;
1397 struct drm_plane_state *old_plane_state;
1398 struct drm_plane_state *new_plane_state;
1399 struct drm_crtc *crtc;
1400 struct drm_crtc_state *old_crtc_state;
1401 struct drm_crtc_state *new_crtc_state;
1402 struct drm_connector *conn;
1403 struct drm_connector_state *conn_state;
1404 unsigned int requested_crtc = 0;
1405 unsigned int affected_crtc = 0;
1406 int i, ret = 0;
1407
1408 drm_dbg_atomic(dev, "checking %p\n", state);
1409
1410 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1411 if (new_crtc_state->enable)
1412 requested_crtc |= drm_crtc_mask(crtc);
1413 }
1414
1415 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1416 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1417 if (ret) {
1418 drm_dbg_atomic(dev, "[PLANE:%d:%s] atomic core check failed\n",
1419 plane->base.id, plane->name);
1420 return ret;
1421 }
1422 }
1423
1424 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1425 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1426 if (ret) {
1427 drm_dbg_atomic(dev, "[CRTC:%d:%s] atomic core check failed\n",
1428 crtc->base.id, crtc->name);
1429 return ret;
1430 }
1431 }
1432
1433 for_each_new_connector_in_state(state, conn, conn_state, i) {
1434 ret = drm_atomic_connector_check(conn, conn_state);
1435 if (ret) {
1436 drm_dbg_atomic(dev, "[CONNECTOR:%d:%s] atomic core check failed\n",
1437 conn->base.id, conn->name);
1438 return ret;
1439 }
1440 }
1441
1442 if (config->funcs->atomic_check) {
1443 ret = config->funcs->atomic_check(state->dev, state);
1444
1445 if (ret) {
1446 drm_dbg_atomic(dev, "atomic driver check for %p failed: %d\n",
1447 state, ret);
1448 return ret;
1449 }
1450 }
1451
1452 if (!state->allow_modeset) {
1453 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1454 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1455 drm_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n",
1456 crtc->base.id, crtc->name);
1457 return -EINVAL;
1458 }
1459 }
1460 }
1461
1462 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1463 if (new_crtc_state->enable)
1464 affected_crtc |= drm_crtc_mask(crtc);
1465 }
1466
1467 /*
1468 * For commits that allow modesets drivers can add other CRTCs to the
1469 * atomic commit, e.g. when they need to reallocate global resources.
1470 * This can cause spurious EBUSY, which robs compositors of a very
1471 * effective sanity check for their drawing loop. Therefor only allow
1472 * drivers to add unrelated CRTC states for modeset commits.
1473 *
1474 * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output
1475 * so compositors know what's going on.
1476 */
1477 if (affected_crtc != requested_crtc) {
1478 drm_dbg_atomic(dev,
1479 "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n",
1480 requested_crtc, affected_crtc);
1481 WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n",
1482 requested_crtc, affected_crtc);
1483 }
1484
1485 return 0;
1486}
1487EXPORT_SYMBOL(drm_atomic_check_only);
1488
1489/**
1490 * drm_atomic_commit - commit configuration atomically
1491 * @state: atomic configuration to check
1492 *
1493 * Note that this function can return -EDEADLK if the driver needed to acquire
1494 * more locks but encountered a deadlock. The caller must then do the usual w/w
1495 * backoff dance and restart. All other errors are fatal.
1496 *
1497 * This function will take its own reference on @state.
1498 * Callers should always release their reference with drm_atomic_state_put().
1499 *
1500 * Returns:
1501 * 0 on success, negative error code on failure.
1502 */
1503int drm_atomic_commit(struct drm_atomic_state *state)
1504{
1505 struct drm_mode_config *config = &state->dev->mode_config;
1506 struct drm_printer p = drm_info_printer(state->dev->dev);
1507 int ret;
1508
1509 if (drm_debug_enabled(DRM_UT_STATE))
1510 drm_atomic_print_new_state(state, &p);
1511
1512 ret = drm_atomic_check_only(state);
1513 if (ret)
1514 return ret;
1515
1516 drm_dbg_atomic(state->dev, "committing %p\n", state);
1517
1518 return config->funcs->atomic_commit(state->dev, state, false);
1519}
1520EXPORT_SYMBOL(drm_atomic_commit);
1521
1522/**
1523 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1524 * @state: atomic configuration to check
1525 *
1526 * Note that this function can return -EDEADLK if the driver needed to acquire
1527 * more locks but encountered a deadlock. The caller must then do the usual w/w
1528 * backoff dance and restart. All other errors are fatal.
1529 *
1530 * This function will take its own reference on @state.
1531 * Callers should always release their reference with drm_atomic_state_put().
1532 *
1533 * Returns:
1534 * 0 on success, negative error code on failure.
1535 */
1536int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1537{
1538 struct drm_mode_config *config = &state->dev->mode_config;
1539 int ret;
1540
1541 ret = drm_atomic_check_only(state);
1542 if (ret)
1543 return ret;
1544
1545 drm_dbg_atomic(state->dev, "committing %p nonblocking\n", state);
1546
1547 return config->funcs->atomic_commit(state->dev, state, true);
1548}
1549EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1550
1551/* just used from drm-client and atomic-helper: */
1552int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1553 struct drm_plane_state *plane_state)
1554{
1555 int ret;
1556
1557 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1558 if (ret != 0)
1559 return ret;
1560
1561 drm_atomic_set_fb_for_plane(plane_state, NULL);
1562 plane_state->crtc_x = 0;
1563 plane_state->crtc_y = 0;
1564 plane_state->crtc_w = 0;
1565 plane_state->crtc_h = 0;
1566 plane_state->src_x = 0;
1567 plane_state->src_y = 0;
1568 plane_state->src_w = 0;
1569 plane_state->src_h = 0;
1570
1571 return 0;
1572}
1573EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1574
1575static int update_output_state(struct drm_atomic_state *state,
1576 struct drm_mode_set *set)
1577{
1578 struct drm_device *dev = set->crtc->dev;
1579 struct drm_crtc *crtc;
1580 struct drm_crtc_state *new_crtc_state;
1581 struct drm_connector *connector;
1582 struct drm_connector_state *new_conn_state;
1583 int ret, i;
1584
1585 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1586 state->acquire_ctx);
1587 if (ret)
1588 return ret;
1589
1590 /* First disable all connectors on the target crtc. */
1591 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1592 if (ret)
1593 return ret;
1594
1595 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1596 if (new_conn_state->crtc == set->crtc) {
1597 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1598 NULL);
1599 if (ret)
1600 return ret;
1601
1602 /* Make sure legacy setCrtc always re-trains */
1603 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1604 }
1605 }
1606
1607 /* Then set all connectors from set->connectors on the target crtc */
1608 for (i = 0; i < set->num_connectors; i++) {
1609 new_conn_state = drm_atomic_get_connector_state(state,
1610 set->connectors[i]);
1611 if (IS_ERR(new_conn_state))
1612 return PTR_ERR(new_conn_state);
1613
1614 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1615 set->crtc);
1616 if (ret)
1617 return ret;
1618 }
1619
1620 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1621 /*
1622 * Don't update ->enable for the CRTC in the set_config request,
1623 * since a mismatch would indicate a bug in the upper layers.
1624 * The actual modeset code later on will catch any
1625 * inconsistencies here.
1626 */
1627 if (crtc == set->crtc)
1628 continue;
1629
1630 if (!new_crtc_state->connector_mask) {
1631 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1632 NULL);
1633 if (ret < 0)
1634 return ret;
1635
1636 new_crtc_state->active = false;
1637 }
1638 }
1639
1640 return 0;
1641}
1642
1643/* just used from drm-client and atomic-helper: */
1644int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1645 struct drm_atomic_state *state)
1646{
1647 struct drm_crtc_state *crtc_state;
1648 struct drm_plane_state *primary_state;
1649 struct drm_crtc *crtc = set->crtc;
1650 int hdisplay, vdisplay;
1651 int ret;
1652
1653 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1654 if (IS_ERR(crtc_state))
1655 return PTR_ERR(crtc_state);
1656
1657 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1658 if (IS_ERR(primary_state))
1659 return PTR_ERR(primary_state);
1660
1661 if (!set->mode) {
1662 WARN_ON(set->fb);
1663 WARN_ON(set->num_connectors);
1664
1665 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1666 if (ret != 0)
1667 return ret;
1668
1669 crtc_state->active = false;
1670
1671 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1672 if (ret != 0)
1673 return ret;
1674
1675 drm_atomic_set_fb_for_plane(primary_state, NULL);
1676
1677 goto commit;
1678 }
1679
1680 WARN_ON(!set->fb);
1681 WARN_ON(!set->num_connectors);
1682
1683 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1684 if (ret != 0)
1685 return ret;
1686
1687 crtc_state->active = true;
1688
1689 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1690 if (ret != 0)
1691 return ret;
1692
1693 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1694
1695 drm_atomic_set_fb_for_plane(primary_state, set->fb);
1696 primary_state->crtc_x = 0;
1697 primary_state->crtc_y = 0;
1698 primary_state->crtc_w = hdisplay;
1699 primary_state->crtc_h = vdisplay;
1700 primary_state->src_x = set->x << 16;
1701 primary_state->src_y = set->y << 16;
1702 if (drm_rotation_90_or_270(primary_state->rotation)) {
1703 primary_state->src_w = vdisplay << 16;
1704 primary_state->src_h = hdisplay << 16;
1705 } else {
1706 primary_state->src_w = hdisplay << 16;
1707 primary_state->src_h = vdisplay << 16;
1708 }
1709
1710commit:
1711 ret = update_output_state(state, set);
1712 if (ret)
1713 return ret;
1714
1715 return 0;
1716}
1717EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1718
1719static void drm_atomic_private_obj_print_state(struct drm_printer *p,
1720 const struct drm_private_state *state)
1721{
1722 struct drm_private_obj *obj = state->obj;
1723
1724 if (obj->funcs->atomic_print_state)
1725 obj->funcs->atomic_print_state(p, state);
1726}
1727
1728/**
1729 * drm_atomic_print_new_state - prints drm atomic state
1730 * @state: atomic configuration to check
1731 * @p: drm printer
1732 *
1733 * This functions prints the drm atomic state snapshot using the drm printer
1734 * which is passed to it. This snapshot can be used for debugging purposes.
1735 *
1736 * Note that this function looks into the new state objects and hence its not
1737 * safe to be used after the call to drm_atomic_helper_commit_hw_done().
1738 */
1739void drm_atomic_print_new_state(const struct drm_atomic_state *state,
1740 struct drm_printer *p)
1741{
1742 struct drm_plane *plane;
1743 struct drm_plane_state *plane_state;
1744 struct drm_crtc *crtc;
1745 struct drm_crtc_state *crtc_state;
1746 struct drm_connector *connector;
1747 struct drm_connector_state *connector_state;
1748 struct drm_private_obj *obj;
1749 struct drm_private_state *obj_state;
1750 int i;
1751
1752 if (!p) {
1753 drm_err(state->dev, "invalid drm printer\n");
1754 return;
1755 }
1756
1757 drm_dbg_atomic(state->dev, "checking %p\n", state);
1758
1759 for_each_new_plane_in_state(state, plane, plane_state, i)
1760 drm_atomic_plane_print_state(p, plane_state);
1761
1762 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1763 drm_atomic_crtc_print_state(p, crtc_state);
1764
1765 for_each_new_connector_in_state(state, connector, connector_state, i)
1766 drm_atomic_connector_print_state(p, connector_state);
1767
1768 for_each_new_private_obj_in_state(state, obj, obj_state, i)
1769 drm_atomic_private_obj_print_state(p, obj_state);
1770}
1771EXPORT_SYMBOL(drm_atomic_print_new_state);
1772
1773static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1774 bool take_locks)
1775{
1776 struct drm_mode_config *config = &dev->mode_config;
1777 struct drm_plane *plane;
1778 struct drm_crtc *crtc;
1779 struct drm_connector *connector;
1780 struct drm_connector_list_iter conn_iter;
1781 struct drm_private_obj *obj;
1782
1783 if (!drm_drv_uses_atomic_modeset(dev))
1784 return;
1785
1786 list_for_each_entry(plane, &config->plane_list, head) {
1787 if (take_locks)
1788 drm_modeset_lock(&plane->mutex, NULL);
1789 drm_atomic_plane_print_state(p, plane->state);
1790 if (take_locks)
1791 drm_modeset_unlock(&plane->mutex);
1792 }
1793
1794 list_for_each_entry(crtc, &config->crtc_list, head) {
1795 if (take_locks)
1796 drm_modeset_lock(&crtc->mutex, NULL);
1797 drm_atomic_crtc_print_state(p, crtc->state);
1798 if (take_locks)
1799 drm_modeset_unlock(&crtc->mutex);
1800 }
1801
1802 drm_connector_list_iter_begin(dev, &conn_iter);
1803 if (take_locks)
1804 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1805 drm_for_each_connector_iter(connector, &conn_iter)
1806 drm_atomic_connector_print_state(p, connector->state);
1807 if (take_locks)
1808 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1809 drm_connector_list_iter_end(&conn_iter);
1810
1811 list_for_each_entry(obj, &config->privobj_list, head) {
1812 if (take_locks)
1813 drm_modeset_lock(&obj->lock, NULL);
1814 drm_atomic_private_obj_print_state(p, obj->state);
1815 if (take_locks)
1816 drm_modeset_unlock(&obj->lock);
1817 }
1818}
1819
1820/**
1821 * drm_state_dump - dump entire device atomic state
1822 * @dev: the drm device
1823 * @p: where to print the state to
1824 *
1825 * Just for debugging. Drivers might want an option to dump state
1826 * to dmesg in case of error irq's. (Hint, you probably want to
1827 * ratelimit this!)
1828 *
1829 * The caller must wrap this drm_modeset_lock_all_ctx() and
1830 * drm_modeset_drop_locks(). If this is called from error irq handler, it should
1831 * not be enabled by default - if you are debugging errors you might
1832 * not care that this is racey, but calling this without all modeset locks held
1833 * is inherently unsafe.
1834 */
1835void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1836{
1837 __drm_state_dump(dev, p, false);
1838}
1839EXPORT_SYMBOL(drm_state_dump);
1840
1841#ifdef CONFIG_DEBUG_FS
1842static int drm_state_info(struct seq_file *m, void *data)
1843{
1844 struct drm_debugfs_entry *entry = m->private;
1845 struct drm_device *dev = entry->dev;
1846 struct drm_printer p = drm_seq_file_printer(m);
1847
1848 __drm_state_dump(dev, &p, true);
1849
1850 return 0;
1851}
1852
1853/* any use in debugfs files to dump individual planes/crtc/etc? */
1854static const struct drm_debugfs_info drm_atomic_debugfs_list[] = {
1855 {"state", drm_state_info, 0},
1856};
1857
1858void drm_atomic_debugfs_init(struct drm_device *dev)
1859{
1860 drm_debugfs_add_files(dev, drm_atomic_debugfs_list,
1861 ARRAY_SIZE(drm_atomic_debugfs_list));
1862}
1863#endif