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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_debugfs.h>
34#include <drm/drm_device.h>
35#include <drm/drm_drv.h>
36#include <drm/drm_file.h>
37#include <drm/drm_fourcc.h>
38#include <drm/drm_mode.h>
39#include <drm/drm_print.h>
40#include <drm/drm_writeback.h>
41
42#include "drm_crtc_internal.h"
43#include "drm_internal.h"
44
45void __drm_crtc_commit_free(struct kref *kref)
46{
47 struct drm_crtc_commit *commit =
48 container_of(kref, struct drm_crtc_commit, ref);
49
50 kfree(commit);
51}
52EXPORT_SYMBOL(__drm_crtc_commit_free);
53
54/**
55 * drm_atomic_state_default_release -
56 * release memory initialized by drm_atomic_state_init
57 * @state: atomic state
58 *
59 * Free all the memory allocated by drm_atomic_state_init.
60 * This should only be used by drivers which are still subclassing
61 * &drm_atomic_state and haven't switched to &drm_private_state yet.
62 */
63void drm_atomic_state_default_release(struct drm_atomic_state *state)
64{
65 kfree(state->connectors);
66 kfree(state->crtcs);
67 kfree(state->planes);
68 kfree(state->private_objs);
69}
70EXPORT_SYMBOL(drm_atomic_state_default_release);
71
72/**
73 * drm_atomic_state_init - init new atomic state
74 * @dev: DRM device
75 * @state: atomic state
76 *
77 * Default implementation for filling in a new atomic state.
78 * This should only be used by drivers which are still subclassing
79 * &drm_atomic_state and haven't switched to &drm_private_state yet.
80 */
81int
82drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
83{
84 kref_init(&state->ref);
85
86 /* TODO legacy paths should maybe do a better job about
87 * setting this appropriately?
88 */
89 state->allow_modeset = true;
90
91 state->crtcs = kcalloc(dev->mode_config.num_crtc,
92 sizeof(*state->crtcs), GFP_KERNEL);
93 if (!state->crtcs)
94 goto fail;
95 state->planes = kcalloc(dev->mode_config.num_total_plane,
96 sizeof(*state->planes), GFP_KERNEL);
97 if (!state->planes)
98 goto fail;
99
100 state->dev = dev;
101
102 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
103
104 return 0;
105fail:
106 drm_atomic_state_default_release(state);
107 return -ENOMEM;
108}
109EXPORT_SYMBOL(drm_atomic_state_init);
110
111/**
112 * drm_atomic_state_alloc - allocate atomic state
113 * @dev: DRM device
114 *
115 * This allocates an empty atomic state to track updates.
116 */
117struct drm_atomic_state *
118drm_atomic_state_alloc(struct drm_device *dev)
119{
120 struct drm_mode_config *config = &dev->mode_config;
121
122 if (!config->funcs->atomic_state_alloc) {
123 struct drm_atomic_state *state;
124
125 state = kzalloc(sizeof(*state), GFP_KERNEL);
126 if (!state)
127 return NULL;
128 if (drm_atomic_state_init(dev, state) < 0) {
129 kfree(state);
130 return NULL;
131 }
132 return state;
133 }
134
135 return config->funcs->atomic_state_alloc(dev);
136}
137EXPORT_SYMBOL(drm_atomic_state_alloc);
138
139/**
140 * drm_atomic_state_default_clear - clear base atomic state
141 * @state: atomic state
142 *
143 * Default implementation for clearing atomic state.
144 * This should only be used by drivers which are still subclassing
145 * &drm_atomic_state and haven't switched to &drm_private_state yet.
146 */
147void drm_atomic_state_default_clear(struct drm_atomic_state *state)
148{
149 struct drm_device *dev = state->dev;
150 struct drm_mode_config *config = &dev->mode_config;
151 int i;
152
153 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
154
155 for (i = 0; i < state->num_connector; i++) {
156 struct drm_connector *connector = state->connectors[i].ptr;
157
158 if (!connector)
159 continue;
160
161 connector->funcs->atomic_destroy_state(connector,
162 state->connectors[i].state);
163 state->connectors[i].ptr = NULL;
164 state->connectors[i].state = NULL;
165 state->connectors[i].old_state = NULL;
166 state->connectors[i].new_state = NULL;
167 drm_connector_put(connector);
168 }
169
170 for (i = 0; i < config->num_crtc; i++) {
171 struct drm_crtc *crtc = state->crtcs[i].ptr;
172
173 if (!crtc)
174 continue;
175
176 crtc->funcs->atomic_destroy_state(crtc,
177 state->crtcs[i].state);
178
179 state->crtcs[i].ptr = NULL;
180 state->crtcs[i].state = NULL;
181 state->crtcs[i].old_state = NULL;
182 state->crtcs[i].new_state = NULL;
183
184 if (state->crtcs[i].commit) {
185 drm_crtc_commit_put(state->crtcs[i].commit);
186 state->crtcs[i].commit = NULL;
187 }
188 }
189
190 for (i = 0; i < config->num_total_plane; i++) {
191 struct drm_plane *plane = state->planes[i].ptr;
192
193 if (!plane)
194 continue;
195
196 plane->funcs->atomic_destroy_state(plane,
197 state->planes[i].state);
198 state->planes[i].ptr = NULL;
199 state->planes[i].state = NULL;
200 state->planes[i].old_state = NULL;
201 state->planes[i].new_state = NULL;
202 }
203
204 for (i = 0; i < state->num_private_objs; i++) {
205 struct drm_private_obj *obj = state->private_objs[i].ptr;
206
207 obj->funcs->atomic_destroy_state(obj,
208 state->private_objs[i].state);
209 state->private_objs[i].ptr = NULL;
210 state->private_objs[i].state = NULL;
211 state->private_objs[i].old_state = NULL;
212 state->private_objs[i].new_state = NULL;
213 }
214 state->num_private_objs = 0;
215
216 if (state->fake_commit) {
217 drm_crtc_commit_put(state->fake_commit);
218 state->fake_commit = NULL;
219 }
220}
221EXPORT_SYMBOL(drm_atomic_state_default_clear);
222
223/**
224 * drm_atomic_state_clear - clear state object
225 * @state: atomic state
226 *
227 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
228 * all locks. So someone else could sneak in and change the current modeset
229 * configuration. Which means that all the state assembled in @state is no
230 * longer an atomic update to the current state, but to some arbitrary earlier
231 * state. Which could break assumptions the driver's
232 * &drm_mode_config_funcs.atomic_check likely relies on.
233 *
234 * Hence we must clear all cached state and completely start over, using this
235 * function.
236 */
237void drm_atomic_state_clear(struct drm_atomic_state *state)
238{
239 struct drm_device *dev = state->dev;
240 struct drm_mode_config *config = &dev->mode_config;
241
242 if (config->funcs->atomic_state_clear)
243 config->funcs->atomic_state_clear(state);
244 else
245 drm_atomic_state_default_clear(state);
246}
247EXPORT_SYMBOL(drm_atomic_state_clear);
248
249/**
250 * __drm_atomic_state_free - free all memory for an atomic state
251 * @ref: This atomic state to deallocate
252 *
253 * This frees all memory associated with an atomic state, including all the
254 * per-object state for planes, crtcs and connectors.
255 */
256void __drm_atomic_state_free(struct kref *ref)
257{
258 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
259 struct drm_mode_config *config = &state->dev->mode_config;
260
261 drm_atomic_state_clear(state);
262
263 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
264
265 if (config->funcs->atomic_state_free) {
266 config->funcs->atomic_state_free(state);
267 } else {
268 drm_atomic_state_default_release(state);
269 kfree(state);
270 }
271}
272EXPORT_SYMBOL(__drm_atomic_state_free);
273
274/**
275 * drm_atomic_get_crtc_state - get crtc state
276 * @state: global atomic state object
277 * @crtc: crtc to get state object for
278 *
279 * This function returns the crtc state for the given crtc, allocating it if
280 * needed. It will also grab the relevant crtc lock to make sure that the state
281 * is consistent.
282 *
283 * Returns:
284 *
285 * Either the allocated state or the error code encoded into the pointer. When
286 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
287 * entire atomic sequence must be restarted. All other errors are fatal.
288 */
289struct drm_crtc_state *
290drm_atomic_get_crtc_state(struct drm_atomic_state *state,
291 struct drm_crtc *crtc)
292{
293 int ret, index = drm_crtc_index(crtc);
294 struct drm_crtc_state *crtc_state;
295
296 WARN_ON(!state->acquire_ctx);
297
298 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
299 if (crtc_state)
300 return crtc_state;
301
302 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
303 if (ret)
304 return ERR_PTR(ret);
305
306 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
307 if (!crtc_state)
308 return ERR_PTR(-ENOMEM);
309
310 state->crtcs[index].state = crtc_state;
311 state->crtcs[index].old_state = crtc->state;
312 state->crtcs[index].new_state = crtc_state;
313 state->crtcs[index].ptr = crtc;
314 crtc_state->state = state;
315
316 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
317 crtc->base.id, crtc->name, crtc_state, state);
318
319 return crtc_state;
320}
321EXPORT_SYMBOL(drm_atomic_get_crtc_state);
322
323static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
324 const struct drm_crtc_state *new_crtc_state)
325{
326 struct drm_crtc *crtc = new_crtc_state->crtc;
327
328 /* NOTE: we explicitly don't enforce constraints such as primary
329 * layer covering entire screen, since that is something we want
330 * to allow (on hw that supports it). For hw that does not, it
331 * should be checked in driver's crtc->atomic_check() vfunc.
332 *
333 * TODO: Add generic modeset state checks once we support those.
334 */
335
336 if (new_crtc_state->active && !new_crtc_state->enable) {
337 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
338 crtc->base.id, crtc->name);
339 return -EINVAL;
340 }
341
342 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
343 * as this is a kernel-internal detail that userspace should never
344 * be able to trigger. */
345 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
346 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
347 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
348 crtc->base.id, crtc->name);
349 return -EINVAL;
350 }
351
352 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
353 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
354 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
355 crtc->base.id, crtc->name);
356 return -EINVAL;
357 }
358
359 /*
360 * Reject event generation for when a CRTC is off and stays off.
361 * It wouldn't be hard to implement this, but userspace has a track
362 * record of happily burning through 100% cpu (or worse, crash) when the
363 * display pipe is suspended. To avoid all that fun just reject updates
364 * that ask for events since likely that indicates a bug in the
365 * compositor's drawing loop. This is consistent with the vblank IOCTL
366 * and legacy page_flip IOCTL which also reject service on a disabled
367 * pipe.
368 */
369 if (new_crtc_state->event &&
370 !new_crtc_state->active && !old_crtc_state->active) {
371 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
372 crtc->base.id, crtc->name);
373 return -EINVAL;
374 }
375
376 return 0;
377}
378
379static void drm_atomic_crtc_print_state(struct drm_printer *p,
380 const struct drm_crtc_state *state)
381{
382 struct drm_crtc *crtc = state->crtc;
383
384 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
385 drm_printf(p, "\tenable=%d\n", state->enable);
386 drm_printf(p, "\tactive=%d\n", state->active);
387 drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
388 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
389 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
390 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
391 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
392 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
393 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
394 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
395 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
396 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
397
398 if (crtc->funcs->atomic_print_state)
399 crtc->funcs->atomic_print_state(p, state);
400}
401
402static int drm_atomic_connector_check(struct drm_connector *connector,
403 struct drm_connector_state *state)
404{
405 struct drm_crtc_state *crtc_state;
406 struct drm_writeback_job *writeback_job = state->writeback_job;
407 const struct drm_display_info *info = &connector->display_info;
408
409 state->max_bpc = info->bpc ? info->bpc : 8;
410 if (connector->max_bpc_property)
411 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
412
413 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
414 return 0;
415
416 if (writeback_job->fb && !state->crtc) {
417 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n",
418 connector->base.id, connector->name);
419 return -EINVAL;
420 }
421
422 if (state->crtc)
423 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
424 state->crtc);
425
426 if (writeback_job->fb && !crtc_state->active) {
427 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
428 connector->base.id, connector->name,
429 state->crtc->base.id);
430 return -EINVAL;
431 }
432
433 if (!writeback_job->fb) {
434 if (writeback_job->out_fence) {
435 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
436 connector->base.id, connector->name);
437 return -EINVAL;
438 }
439
440 drm_writeback_cleanup_job(writeback_job);
441 state->writeback_job = NULL;
442 }
443
444 return 0;
445}
446
447/**
448 * drm_atomic_get_plane_state - get plane state
449 * @state: global atomic state object
450 * @plane: plane to get state object for
451 *
452 * This function returns the plane state for the given plane, allocating it if
453 * needed. It will also grab the relevant plane lock to make sure that the state
454 * is consistent.
455 *
456 * Returns:
457 *
458 * Either the allocated state or the error code encoded into the pointer. When
459 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
460 * entire atomic sequence must be restarted. All other errors are fatal.
461 */
462struct drm_plane_state *
463drm_atomic_get_plane_state(struct drm_atomic_state *state,
464 struct drm_plane *plane)
465{
466 int ret, index = drm_plane_index(plane);
467 struct drm_plane_state *plane_state;
468
469 WARN_ON(!state->acquire_ctx);
470
471 /* the legacy pointers should never be set */
472 WARN_ON(plane->fb);
473 WARN_ON(plane->old_fb);
474 WARN_ON(plane->crtc);
475
476 plane_state = drm_atomic_get_existing_plane_state(state, plane);
477 if (plane_state)
478 return plane_state;
479
480 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
481 if (ret)
482 return ERR_PTR(ret);
483
484 plane_state = plane->funcs->atomic_duplicate_state(plane);
485 if (!plane_state)
486 return ERR_PTR(-ENOMEM);
487
488 state->planes[index].state = plane_state;
489 state->planes[index].ptr = plane;
490 state->planes[index].old_state = plane->state;
491 state->planes[index].new_state = plane_state;
492 plane_state->state = state;
493
494 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
495 plane->base.id, plane->name, plane_state, state);
496
497 if (plane_state->crtc) {
498 struct drm_crtc_state *crtc_state;
499
500 crtc_state = drm_atomic_get_crtc_state(state,
501 plane_state->crtc);
502 if (IS_ERR(crtc_state))
503 return ERR_CAST(crtc_state);
504 }
505
506 return plane_state;
507}
508EXPORT_SYMBOL(drm_atomic_get_plane_state);
509
510static bool
511plane_switching_crtc(const struct drm_plane_state *old_plane_state,
512 const struct drm_plane_state *new_plane_state)
513{
514 if (!old_plane_state->crtc || !new_plane_state->crtc)
515 return false;
516
517 if (old_plane_state->crtc == new_plane_state->crtc)
518 return false;
519
520 /* This could be refined, but currently there's no helper or driver code
521 * to implement direct switching of active planes nor userspace to take
522 * advantage of more direct plane switching without the intermediate
523 * full OFF state.
524 */
525 return true;
526}
527
528/**
529 * drm_atomic_plane_check - check plane state
530 * @old_plane_state: old plane state to check
531 * @new_plane_state: new plane state to check
532 *
533 * Provides core sanity checks for plane state.
534 *
535 * RETURNS:
536 * Zero on success, error code on failure
537 */
538static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
539 const struct drm_plane_state *new_plane_state)
540{
541 struct drm_plane *plane = new_plane_state->plane;
542 struct drm_crtc *crtc = new_plane_state->crtc;
543 const struct drm_framebuffer *fb = new_plane_state->fb;
544 unsigned int fb_width, fb_height;
545 struct drm_mode_rect *clips;
546 uint32_t num_clips;
547 int ret;
548
549 /* either *both* CRTC and FB must be set, or neither */
550 if (crtc && !fb) {
551 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
552 plane->base.id, plane->name);
553 return -EINVAL;
554 } else if (fb && !crtc) {
555 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
556 plane->base.id, plane->name);
557 return -EINVAL;
558 }
559
560 /* if disabled, we don't care about the rest of the state: */
561 if (!crtc)
562 return 0;
563
564 /* Check whether this plane is usable on this CRTC */
565 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
566 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
567 crtc->base.id, crtc->name,
568 plane->base.id, plane->name);
569 return -EINVAL;
570 }
571
572 /* Check whether this plane supports the fb pixel format. */
573 ret = drm_plane_check_pixel_format(plane, fb->format->format,
574 fb->modifier);
575 if (ret) {
576 struct drm_format_name_buf format_name;
577 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
578 plane->base.id, plane->name,
579 drm_get_format_name(fb->format->format,
580 &format_name),
581 fb->modifier);
582 return ret;
583 }
584
585 /* Give drivers some help against integer overflows */
586 if (new_plane_state->crtc_w > INT_MAX ||
587 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
588 new_plane_state->crtc_h > INT_MAX ||
589 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
590 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
591 plane->base.id, plane->name,
592 new_plane_state->crtc_w, new_plane_state->crtc_h,
593 new_plane_state->crtc_x, new_plane_state->crtc_y);
594 return -ERANGE;
595 }
596
597 fb_width = fb->width << 16;
598 fb_height = fb->height << 16;
599
600 /* Make sure source coordinates are inside the fb. */
601 if (new_plane_state->src_w > fb_width ||
602 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
603 new_plane_state->src_h > fb_height ||
604 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
605 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
606 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
607 plane->base.id, plane->name,
608 new_plane_state->src_w >> 16,
609 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
610 new_plane_state->src_h >> 16,
611 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
612 new_plane_state->src_x >> 16,
613 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
614 new_plane_state->src_y >> 16,
615 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
616 fb->width, fb->height);
617 return -ENOSPC;
618 }
619
620 clips = drm_plane_get_damage_clips(new_plane_state);
621 num_clips = drm_plane_get_damage_clips_count(new_plane_state);
622
623 /* Make sure damage clips are valid and inside the fb. */
624 while (num_clips > 0) {
625 if (clips->x1 >= clips->x2 ||
626 clips->y1 >= clips->y2 ||
627 clips->x1 < 0 ||
628 clips->y1 < 0 ||
629 clips->x2 > fb_width ||
630 clips->y2 > fb_height) {
631 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
632 plane->base.id, plane->name, clips->x1,
633 clips->y1, clips->x2, clips->y2);
634 return -EINVAL;
635 }
636 clips++;
637 num_clips--;
638 }
639
640 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
641 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
642 plane->base.id, plane->name);
643 return -EINVAL;
644 }
645
646 return 0;
647}
648
649static void drm_atomic_plane_print_state(struct drm_printer *p,
650 const struct drm_plane_state *state)
651{
652 struct drm_plane *plane = state->plane;
653 struct drm_rect src = drm_plane_state_src(state);
654 struct drm_rect dest = drm_plane_state_dest(state);
655
656 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
657 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
658 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
659 if (state->fb)
660 drm_framebuffer_print_info(p, 2, state->fb);
661 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
662 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
663 drm_printf(p, "\trotation=%x\n", state->rotation);
664 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
665 drm_printf(p, "\tcolor-encoding=%s\n",
666 drm_get_color_encoding_name(state->color_encoding));
667 drm_printf(p, "\tcolor-range=%s\n",
668 drm_get_color_range_name(state->color_range));
669
670 if (plane->funcs->atomic_print_state)
671 plane->funcs->atomic_print_state(p, state);
672}
673
674/**
675 * DOC: handling driver private state
676 *
677 * Very often the DRM objects exposed to userspace in the atomic modeset api
678 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
679 * underlying hardware. Especially for any kind of shared resources (e.g. shared
680 * clocks, scaler units, bandwidth and fifo limits shared among a group of
681 * planes or CRTCs, and so on) it makes sense to model these as independent
682 * objects. Drivers then need to do similar state tracking and commit ordering for
683 * such private (since not exposed to userpace) objects as the atomic core and
684 * helpers already provide for connectors, planes and CRTCs.
685 *
686 * To make this easier on drivers the atomic core provides some support to track
687 * driver private state objects using struct &drm_private_obj, with the
688 * associated state struct &drm_private_state.
689 *
690 * Similar to userspace-exposed objects, private state structures can be
691 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
692 * does not take care of locking, drivers should wrap it for each type of
693 * private state object they have with the required call to drm_modeset_lock()
694 * for the corresponding &drm_modeset_lock.
695 *
696 * All private state structures contained in a &drm_atomic_state update can be
697 * iterated using for_each_oldnew_private_obj_in_state(),
698 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
699 * Drivers are recommended to wrap these for each type of driver private state
700 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
701 * least if they want to iterate over all objects of a given type.
702 *
703 * An earlier way to handle driver private state was by subclassing struct
704 * &drm_atomic_state. But since that encourages non-standard ways to implement
705 * the check/commit split atomic requires (by using e.g. "check and rollback or
706 * commit instead" of "duplicate state, check, then either commit or release
707 * duplicated state) it is deprecated in favour of using &drm_private_state.
708 */
709
710/**
711 * drm_atomic_private_obj_init - initialize private object
712 * @dev: DRM device this object will be attached to
713 * @obj: private object
714 * @state: initial private object state
715 * @funcs: pointer to the struct of function pointers that identify the object
716 * type
717 *
718 * Initialize the private object, which can be embedded into any
719 * driver private object that needs its own atomic state.
720 */
721void
722drm_atomic_private_obj_init(struct drm_device *dev,
723 struct drm_private_obj *obj,
724 struct drm_private_state *state,
725 const struct drm_private_state_funcs *funcs)
726{
727 memset(obj, 0, sizeof(*obj));
728
729 drm_modeset_lock_init(&obj->lock);
730
731 obj->state = state;
732 obj->funcs = funcs;
733 list_add_tail(&obj->head, &dev->mode_config.privobj_list);
734}
735EXPORT_SYMBOL(drm_atomic_private_obj_init);
736
737/**
738 * drm_atomic_private_obj_fini - finalize private object
739 * @obj: private object
740 *
741 * Finalize the private object.
742 */
743void
744drm_atomic_private_obj_fini(struct drm_private_obj *obj)
745{
746 list_del(&obj->head);
747 obj->funcs->atomic_destroy_state(obj, obj->state);
748 drm_modeset_lock_fini(&obj->lock);
749}
750EXPORT_SYMBOL(drm_atomic_private_obj_fini);
751
752/**
753 * drm_atomic_get_private_obj_state - get private object state
754 * @state: global atomic state
755 * @obj: private object to get the state for
756 *
757 * This function returns the private object state for the given private object,
758 * allocating the state if needed. It will also grab the relevant private
759 * object lock to make sure that the state is consistent.
760 *
761 * RETURNS:
762 *
763 * Either the allocated state or the error code encoded into a pointer.
764 */
765struct drm_private_state *
766drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
767 struct drm_private_obj *obj)
768{
769 int index, num_objs, i, ret;
770 size_t size;
771 struct __drm_private_objs_state *arr;
772 struct drm_private_state *obj_state;
773
774 for (i = 0; i < state->num_private_objs; i++)
775 if (obj == state->private_objs[i].ptr)
776 return state->private_objs[i].state;
777
778 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
779 if (ret)
780 return ERR_PTR(ret);
781
782 num_objs = state->num_private_objs + 1;
783 size = sizeof(*state->private_objs) * num_objs;
784 arr = krealloc(state->private_objs, size, GFP_KERNEL);
785 if (!arr)
786 return ERR_PTR(-ENOMEM);
787
788 state->private_objs = arr;
789 index = state->num_private_objs;
790 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
791
792 obj_state = obj->funcs->atomic_duplicate_state(obj);
793 if (!obj_state)
794 return ERR_PTR(-ENOMEM);
795
796 state->private_objs[index].state = obj_state;
797 state->private_objs[index].old_state = obj->state;
798 state->private_objs[index].new_state = obj_state;
799 state->private_objs[index].ptr = obj;
800 obj_state->state = state;
801
802 state->num_private_objs = num_objs;
803
804 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
805 obj, obj_state, state);
806
807 return obj_state;
808}
809EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
810
811/**
812 * drm_atomic_get_old_private_obj_state
813 * @state: global atomic state object
814 * @obj: private_obj to grab
815 *
816 * This function returns the old private object state for the given private_obj,
817 * or NULL if the private_obj is not part of the global atomic state.
818 */
819struct drm_private_state *
820drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
821 struct drm_private_obj *obj)
822{
823 int i;
824
825 for (i = 0; i < state->num_private_objs; i++)
826 if (obj == state->private_objs[i].ptr)
827 return state->private_objs[i].old_state;
828
829 return NULL;
830}
831EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
832
833/**
834 * drm_atomic_get_new_private_obj_state
835 * @state: global atomic state object
836 * @obj: private_obj to grab
837 *
838 * This function returns the new private object state for the given private_obj,
839 * or NULL if the private_obj is not part of the global atomic state.
840 */
841struct drm_private_state *
842drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
843 struct drm_private_obj *obj)
844{
845 int i;
846
847 for (i = 0; i < state->num_private_objs; i++)
848 if (obj == state->private_objs[i].ptr)
849 return state->private_objs[i].new_state;
850
851 return NULL;
852}
853EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
854
855/**
856 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
857 * @state: Atomic state
858 * @encoder: The encoder to fetch the connector state for
859 *
860 * This function finds and returns the connector that was connected to @encoder
861 * as specified by the @state.
862 *
863 * If there is no connector in @state which previously had @encoder connected to
864 * it, this function will return NULL. While this may seem like an invalid use
865 * case, it is sometimes useful to differentiate commits which had no prior
866 * connectors attached to @encoder vs ones that did (and to inspect their
867 * state). This is especially true in enable hooks because the pipeline has
868 * changed.
869 *
870 * Returns: The old connector connected to @encoder, or NULL if the encoder is
871 * not connected.
872 */
873struct drm_connector *
874drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
875 struct drm_encoder *encoder)
876{
877 struct drm_connector_state *conn_state;
878 struct drm_connector *connector;
879 unsigned int i;
880
881 for_each_old_connector_in_state(state, connector, conn_state, i) {
882 if (conn_state->best_encoder == encoder)
883 return connector;
884 }
885
886 return NULL;
887}
888EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
889
890/**
891 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
892 * @state: Atomic state
893 * @encoder: The encoder to fetch the connector state for
894 *
895 * This function finds and returns the connector that will be connected to
896 * @encoder as specified by the @state.
897 *
898 * If there is no connector in @state which will have @encoder connected to it,
899 * this function will return NULL. While this may seem like an invalid use case,
900 * it is sometimes useful to differentiate commits which have no connectors
901 * attached to @encoder vs ones that do (and to inspect their state). This is
902 * especially true in disable hooks because the pipeline will change.
903 *
904 * Returns: The new connector connected to @encoder, or NULL if the encoder is
905 * not connected.
906 */
907struct drm_connector *
908drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
909 struct drm_encoder *encoder)
910{
911 struct drm_connector_state *conn_state;
912 struct drm_connector *connector;
913 unsigned int i;
914
915 for_each_new_connector_in_state(state, connector, conn_state, i) {
916 if (conn_state->best_encoder == encoder)
917 return connector;
918 }
919
920 return NULL;
921}
922EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
923
924/**
925 * drm_atomic_get_connector_state - get connector state
926 * @state: global atomic state object
927 * @connector: connector to get state object for
928 *
929 * This function returns the connector state for the given connector,
930 * allocating it if needed. It will also grab the relevant connector lock to
931 * make sure that the state is consistent.
932 *
933 * Returns:
934 *
935 * Either the allocated state or the error code encoded into the pointer. When
936 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
937 * entire atomic sequence must be restarted. All other errors are fatal.
938 */
939struct drm_connector_state *
940drm_atomic_get_connector_state(struct drm_atomic_state *state,
941 struct drm_connector *connector)
942{
943 int ret, index;
944 struct drm_mode_config *config = &connector->dev->mode_config;
945 struct drm_connector_state *connector_state;
946
947 WARN_ON(!state->acquire_ctx);
948
949 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
950 if (ret)
951 return ERR_PTR(ret);
952
953 index = drm_connector_index(connector);
954
955 if (index >= state->num_connector) {
956 struct __drm_connnectors_state *c;
957 int alloc = max(index + 1, config->num_connector);
958
959 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
960 if (!c)
961 return ERR_PTR(-ENOMEM);
962
963 state->connectors = c;
964 memset(&state->connectors[state->num_connector], 0,
965 sizeof(*state->connectors) * (alloc - state->num_connector));
966
967 state->num_connector = alloc;
968 }
969
970 if (state->connectors[index].state)
971 return state->connectors[index].state;
972
973 connector_state = connector->funcs->atomic_duplicate_state(connector);
974 if (!connector_state)
975 return ERR_PTR(-ENOMEM);
976
977 drm_connector_get(connector);
978 state->connectors[index].state = connector_state;
979 state->connectors[index].old_state = connector->state;
980 state->connectors[index].new_state = connector_state;
981 state->connectors[index].ptr = connector;
982 connector_state->state = state;
983
984 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
985 connector->base.id, connector->name,
986 connector_state, state);
987
988 if (connector_state->crtc) {
989 struct drm_crtc_state *crtc_state;
990
991 crtc_state = drm_atomic_get_crtc_state(state,
992 connector_state->crtc);
993 if (IS_ERR(crtc_state))
994 return ERR_CAST(crtc_state);
995 }
996
997 return connector_state;
998}
999EXPORT_SYMBOL(drm_atomic_get_connector_state);
1000
1001static void drm_atomic_connector_print_state(struct drm_printer *p,
1002 const struct drm_connector_state *state)
1003{
1004 struct drm_connector *connector = state->connector;
1005
1006 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1007 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1008 drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1009
1010 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1011 if (state->writeback_job && state->writeback_job->fb)
1012 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1013
1014 if (connector->funcs->atomic_print_state)
1015 connector->funcs->atomic_print_state(p, state);
1016}
1017
1018/**
1019 * drm_atomic_add_affected_connectors - add connectors for crtc
1020 * @state: atomic state
1021 * @crtc: DRM crtc
1022 *
1023 * This function walks the current configuration and adds all connectors
1024 * currently using @crtc to the atomic configuration @state. Note that this
1025 * function must acquire the connection mutex. This can potentially cause
1026 * unneeded seralization if the update is just for the planes on one crtc. Hence
1027 * drivers and helpers should only call this when really needed (e.g. when a
1028 * full modeset needs to happen due to some change).
1029 *
1030 * Returns:
1031 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1032 * then the w/w mutex code has detected a deadlock and the entire atomic
1033 * sequence must be restarted. All other errors are fatal.
1034 */
1035int
1036drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1037 struct drm_crtc *crtc)
1038{
1039 struct drm_mode_config *config = &state->dev->mode_config;
1040 struct drm_connector *connector;
1041 struct drm_connector_state *conn_state;
1042 struct drm_connector_list_iter conn_iter;
1043 struct drm_crtc_state *crtc_state;
1044 int ret;
1045
1046 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1047 if (IS_ERR(crtc_state))
1048 return PTR_ERR(crtc_state);
1049
1050 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1051 if (ret)
1052 return ret;
1053
1054 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1055 crtc->base.id, crtc->name, state);
1056
1057 /*
1058 * Changed connectors are already in @state, so only need to look
1059 * at the connector_mask in crtc_state.
1060 */
1061 drm_connector_list_iter_begin(state->dev, &conn_iter);
1062 drm_for_each_connector_iter(connector, &conn_iter) {
1063 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1064 continue;
1065
1066 conn_state = drm_atomic_get_connector_state(state, connector);
1067 if (IS_ERR(conn_state)) {
1068 drm_connector_list_iter_end(&conn_iter);
1069 return PTR_ERR(conn_state);
1070 }
1071 }
1072 drm_connector_list_iter_end(&conn_iter);
1073
1074 return 0;
1075}
1076EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1077
1078/**
1079 * drm_atomic_add_affected_planes - add planes for crtc
1080 * @state: atomic state
1081 * @crtc: DRM crtc
1082 *
1083 * This function walks the current configuration and adds all planes
1084 * currently used by @crtc to the atomic configuration @state. This is useful
1085 * when an atomic commit also needs to check all currently enabled plane on
1086 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1087 * to avoid special code to force-enable all planes.
1088 *
1089 * Since acquiring a plane state will always also acquire the w/w mutex of the
1090 * current CRTC for that plane (if there is any) adding all the plane states for
1091 * a CRTC will not reduce parallism of atomic updates.
1092 *
1093 * Returns:
1094 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1095 * then the w/w mutex code has detected a deadlock and the entire atomic
1096 * sequence must be restarted. All other errors are fatal.
1097 */
1098int
1099drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1100 struct drm_crtc *crtc)
1101{
1102 const struct drm_crtc_state *old_crtc_state =
1103 drm_atomic_get_old_crtc_state(state, crtc);
1104 struct drm_plane *plane;
1105
1106 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1107
1108 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
1109 crtc->base.id, crtc->name, state);
1110
1111 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1112 struct drm_plane_state *plane_state =
1113 drm_atomic_get_plane_state(state, plane);
1114
1115 if (IS_ERR(plane_state))
1116 return PTR_ERR(plane_state);
1117 }
1118 return 0;
1119}
1120EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1121
1122/**
1123 * drm_atomic_check_only - check whether a given config would work
1124 * @state: atomic configuration to check
1125 *
1126 * Note that this function can return -EDEADLK if the driver needed to acquire
1127 * more locks but encountered a deadlock. The caller must then do the usual w/w
1128 * backoff dance and restart. All other errors are fatal.
1129 *
1130 * Returns:
1131 * 0 on success, negative error code on failure.
1132 */
1133int drm_atomic_check_only(struct drm_atomic_state *state)
1134{
1135 struct drm_device *dev = state->dev;
1136 struct drm_mode_config *config = &dev->mode_config;
1137 struct drm_plane *plane;
1138 struct drm_plane_state *old_plane_state;
1139 struct drm_plane_state *new_plane_state;
1140 struct drm_crtc *crtc;
1141 struct drm_crtc_state *old_crtc_state;
1142 struct drm_crtc_state *new_crtc_state;
1143 struct drm_connector *conn;
1144 struct drm_connector_state *conn_state;
1145 int i, ret = 0;
1146
1147 DRM_DEBUG_ATOMIC("checking %p\n", state);
1148
1149 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1150 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1151 if (ret) {
1152 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1153 plane->base.id, plane->name);
1154 return ret;
1155 }
1156 }
1157
1158 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1159 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1160 if (ret) {
1161 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1162 crtc->base.id, crtc->name);
1163 return ret;
1164 }
1165 }
1166
1167 for_each_new_connector_in_state(state, conn, conn_state, i) {
1168 ret = drm_atomic_connector_check(conn, conn_state);
1169 if (ret) {
1170 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n",
1171 conn->base.id, conn->name);
1172 return ret;
1173 }
1174 }
1175
1176 if (config->funcs->atomic_check) {
1177 ret = config->funcs->atomic_check(state->dev, state);
1178
1179 if (ret) {
1180 DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
1181 state, ret);
1182 return ret;
1183 }
1184 }
1185
1186 if (!state->allow_modeset) {
1187 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1188 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1189 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1190 crtc->base.id, crtc->name);
1191 return -EINVAL;
1192 }
1193 }
1194 }
1195
1196 return 0;
1197}
1198EXPORT_SYMBOL(drm_atomic_check_only);
1199
1200/**
1201 * drm_atomic_commit - commit configuration atomically
1202 * @state: atomic configuration to check
1203 *
1204 * Note that this function can return -EDEADLK if the driver needed to acquire
1205 * more locks but encountered a deadlock. The caller must then do the usual w/w
1206 * backoff dance and restart. All other errors are fatal.
1207 *
1208 * This function will take its own reference on @state.
1209 * Callers should always release their reference with drm_atomic_state_put().
1210 *
1211 * Returns:
1212 * 0 on success, negative error code on failure.
1213 */
1214int drm_atomic_commit(struct drm_atomic_state *state)
1215{
1216 struct drm_mode_config *config = &state->dev->mode_config;
1217 int ret;
1218
1219 ret = drm_atomic_check_only(state);
1220 if (ret)
1221 return ret;
1222
1223 DRM_DEBUG_ATOMIC("committing %p\n", state);
1224
1225 return config->funcs->atomic_commit(state->dev, state, false);
1226}
1227EXPORT_SYMBOL(drm_atomic_commit);
1228
1229/**
1230 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1231 * @state: atomic configuration to check
1232 *
1233 * Note that this function can return -EDEADLK if the driver needed to acquire
1234 * more locks but encountered a deadlock. The caller must then do the usual w/w
1235 * backoff dance and restart. All other errors are fatal.
1236 *
1237 * This function will take its own reference on @state.
1238 * Callers should always release their reference with drm_atomic_state_put().
1239 *
1240 * Returns:
1241 * 0 on success, negative error code on failure.
1242 */
1243int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1244{
1245 struct drm_mode_config *config = &state->dev->mode_config;
1246 int ret;
1247
1248 ret = drm_atomic_check_only(state);
1249 if (ret)
1250 return ret;
1251
1252 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1253
1254 return config->funcs->atomic_commit(state->dev, state, true);
1255}
1256EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1257
1258/* just used from drm-client and atomic-helper: */
1259int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1260 struct drm_plane_state *plane_state)
1261{
1262 int ret;
1263
1264 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1265 if (ret != 0)
1266 return ret;
1267
1268 drm_atomic_set_fb_for_plane(plane_state, NULL);
1269 plane_state->crtc_x = 0;
1270 plane_state->crtc_y = 0;
1271 plane_state->crtc_w = 0;
1272 plane_state->crtc_h = 0;
1273 plane_state->src_x = 0;
1274 plane_state->src_y = 0;
1275 plane_state->src_w = 0;
1276 plane_state->src_h = 0;
1277
1278 return 0;
1279}
1280EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1281
1282static int update_output_state(struct drm_atomic_state *state,
1283 struct drm_mode_set *set)
1284{
1285 struct drm_device *dev = set->crtc->dev;
1286 struct drm_crtc *crtc;
1287 struct drm_crtc_state *new_crtc_state;
1288 struct drm_connector *connector;
1289 struct drm_connector_state *new_conn_state;
1290 int ret, i;
1291
1292 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1293 state->acquire_ctx);
1294 if (ret)
1295 return ret;
1296
1297 /* First disable all connectors on the target crtc. */
1298 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1299 if (ret)
1300 return ret;
1301
1302 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1303 if (new_conn_state->crtc == set->crtc) {
1304 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1305 NULL);
1306 if (ret)
1307 return ret;
1308
1309 /* Make sure legacy setCrtc always re-trains */
1310 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1311 }
1312 }
1313
1314 /* Then set all connectors from set->connectors on the target crtc */
1315 for (i = 0; i < set->num_connectors; i++) {
1316 new_conn_state = drm_atomic_get_connector_state(state,
1317 set->connectors[i]);
1318 if (IS_ERR(new_conn_state))
1319 return PTR_ERR(new_conn_state);
1320
1321 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1322 set->crtc);
1323 if (ret)
1324 return ret;
1325 }
1326
1327 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1328 /*
1329 * Don't update ->enable for the CRTC in the set_config request,
1330 * since a mismatch would indicate a bug in the upper layers.
1331 * The actual modeset code later on will catch any
1332 * inconsistencies here.
1333 */
1334 if (crtc == set->crtc)
1335 continue;
1336
1337 if (!new_crtc_state->connector_mask) {
1338 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1339 NULL);
1340 if (ret < 0)
1341 return ret;
1342
1343 new_crtc_state->active = false;
1344 }
1345 }
1346
1347 return 0;
1348}
1349
1350/* just used from drm-client and atomic-helper: */
1351int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1352 struct drm_atomic_state *state)
1353{
1354 struct drm_crtc_state *crtc_state;
1355 struct drm_plane_state *primary_state;
1356 struct drm_crtc *crtc = set->crtc;
1357 int hdisplay, vdisplay;
1358 int ret;
1359
1360 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1361 if (IS_ERR(crtc_state))
1362 return PTR_ERR(crtc_state);
1363
1364 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1365 if (IS_ERR(primary_state))
1366 return PTR_ERR(primary_state);
1367
1368 if (!set->mode) {
1369 WARN_ON(set->fb);
1370 WARN_ON(set->num_connectors);
1371
1372 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1373 if (ret != 0)
1374 return ret;
1375
1376 crtc_state->active = false;
1377
1378 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1379 if (ret != 0)
1380 return ret;
1381
1382 drm_atomic_set_fb_for_plane(primary_state, NULL);
1383
1384 goto commit;
1385 }
1386
1387 WARN_ON(!set->fb);
1388 WARN_ON(!set->num_connectors);
1389
1390 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1391 if (ret != 0)
1392 return ret;
1393
1394 crtc_state->active = true;
1395
1396 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1397 if (ret != 0)
1398 return ret;
1399
1400 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1401
1402 drm_atomic_set_fb_for_plane(primary_state, set->fb);
1403 primary_state->crtc_x = 0;
1404 primary_state->crtc_y = 0;
1405 primary_state->crtc_w = hdisplay;
1406 primary_state->crtc_h = vdisplay;
1407 primary_state->src_x = set->x << 16;
1408 primary_state->src_y = set->y << 16;
1409 if (drm_rotation_90_or_270(primary_state->rotation)) {
1410 primary_state->src_w = vdisplay << 16;
1411 primary_state->src_h = hdisplay << 16;
1412 } else {
1413 primary_state->src_w = hdisplay << 16;
1414 primary_state->src_h = vdisplay << 16;
1415 }
1416
1417commit:
1418 ret = update_output_state(state, set);
1419 if (ret)
1420 return ret;
1421
1422 return 0;
1423}
1424EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1425
1426void drm_atomic_print_state(const struct drm_atomic_state *state)
1427{
1428 struct drm_printer p = drm_info_printer(state->dev->dev);
1429 struct drm_plane *plane;
1430 struct drm_plane_state *plane_state;
1431 struct drm_crtc *crtc;
1432 struct drm_crtc_state *crtc_state;
1433 struct drm_connector *connector;
1434 struct drm_connector_state *connector_state;
1435 int i;
1436
1437 DRM_DEBUG_ATOMIC("checking %p\n", state);
1438
1439 for_each_new_plane_in_state(state, plane, plane_state, i)
1440 drm_atomic_plane_print_state(&p, plane_state);
1441
1442 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1443 drm_atomic_crtc_print_state(&p, crtc_state);
1444
1445 for_each_new_connector_in_state(state, connector, connector_state, i)
1446 drm_atomic_connector_print_state(&p, connector_state);
1447}
1448
1449static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1450 bool take_locks)
1451{
1452 struct drm_mode_config *config = &dev->mode_config;
1453 struct drm_plane *plane;
1454 struct drm_crtc *crtc;
1455 struct drm_connector *connector;
1456 struct drm_connector_list_iter conn_iter;
1457
1458 if (!drm_drv_uses_atomic_modeset(dev))
1459 return;
1460
1461 list_for_each_entry(plane, &config->plane_list, head) {
1462 if (take_locks)
1463 drm_modeset_lock(&plane->mutex, NULL);
1464 drm_atomic_plane_print_state(p, plane->state);
1465 if (take_locks)
1466 drm_modeset_unlock(&plane->mutex);
1467 }
1468
1469 list_for_each_entry(crtc, &config->crtc_list, head) {
1470 if (take_locks)
1471 drm_modeset_lock(&crtc->mutex, NULL);
1472 drm_atomic_crtc_print_state(p, crtc->state);
1473 if (take_locks)
1474 drm_modeset_unlock(&crtc->mutex);
1475 }
1476
1477 drm_connector_list_iter_begin(dev, &conn_iter);
1478 if (take_locks)
1479 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1480 drm_for_each_connector_iter(connector, &conn_iter)
1481 drm_atomic_connector_print_state(p, connector->state);
1482 if (take_locks)
1483 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1484 drm_connector_list_iter_end(&conn_iter);
1485}
1486
1487/**
1488 * drm_state_dump - dump entire device atomic state
1489 * @dev: the drm device
1490 * @p: where to print the state to
1491 *
1492 * Just for debugging. Drivers might want an option to dump state
1493 * to dmesg in case of error irq's. (Hint, you probably want to
1494 * ratelimit this!)
1495 *
1496 * The caller must drm_modeset_lock_all(), or if this is called
1497 * from error irq handler, it should not be enabled by default.
1498 * (Ie. if you are debugging errors you might not care that this
1499 * is racey. But calling this without all modeset locks held is
1500 * not inherently safe.)
1501 */
1502void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1503{
1504 __drm_state_dump(dev, p, false);
1505}
1506EXPORT_SYMBOL(drm_state_dump);
1507
1508#ifdef CONFIG_DEBUG_FS
1509static int drm_state_info(struct seq_file *m, void *data)
1510{
1511 struct drm_info_node *node = (struct drm_info_node *) m->private;
1512 struct drm_device *dev = node->minor->dev;
1513 struct drm_printer p = drm_seq_file_printer(m);
1514
1515 __drm_state_dump(dev, &p, true);
1516
1517 return 0;
1518}
1519
1520/* any use in debugfs files to dump individual planes/crtc/etc? */
1521static const struct drm_info_list drm_atomic_debugfs_list[] = {
1522 {"state", drm_state_info, 0},
1523};
1524
1525int drm_atomic_debugfs_init(struct drm_minor *minor)
1526{
1527 return drm_debugfs_create_files(drm_atomic_debugfs_list,
1528 ARRAY_SIZE(drm_atomic_debugfs_list),
1529 minor->debugfs_root, minor);
1530}
1531#endif