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