blob: c2e9c5283136bc62f9b4baf18f46d204c41bc6d9 [file] [log] [blame]
Daniel Vettercc4ceb42014-07-25 21:30:38 +02001/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28
29#include <drm/drmP.h>
30#include <drm/drm_atomic.h>
31#include <drm/drm_plane_helper.h>
32
33static void kfree_state(struct drm_atomic_state *state)
34{
35 kfree(state->connectors);
36 kfree(state->connector_states);
37 kfree(state->crtcs);
38 kfree(state->crtc_states);
39 kfree(state->planes);
40 kfree(state->plane_states);
41 kfree(state);
42}
43
44/**
45 * drm_atomic_state_alloc - allocate atomic state
46 * @dev: DRM device
47 *
48 * This allocates an empty atomic state to track updates.
49 */
50struct drm_atomic_state *
51drm_atomic_state_alloc(struct drm_device *dev)
52{
53 struct drm_atomic_state *state;
54
55 state = kzalloc(sizeof(*state), GFP_KERNEL);
56 if (!state)
57 return NULL;
58
Rob Clarkd34f20d2014-12-18 16:01:56 -050059 /* TODO legacy paths should maybe do a better job about
60 * setting this appropriately?
61 */
62 state->allow_modeset = true;
63
Daniel Vetterf52b69f12014-11-19 18:38:08 +010064 state->num_connector = ACCESS_ONCE(dev->mode_config.num_connector);
65
Daniel Vettercc4ceb42014-07-25 21:30:38 +020066 state->crtcs = kcalloc(dev->mode_config.num_crtc,
67 sizeof(*state->crtcs), GFP_KERNEL);
68 if (!state->crtcs)
69 goto fail;
70 state->crtc_states = kcalloc(dev->mode_config.num_crtc,
71 sizeof(*state->crtc_states), GFP_KERNEL);
72 if (!state->crtc_states)
73 goto fail;
74 state->planes = kcalloc(dev->mode_config.num_total_plane,
75 sizeof(*state->planes), GFP_KERNEL);
76 if (!state->planes)
77 goto fail;
78 state->plane_states = kcalloc(dev->mode_config.num_total_plane,
79 sizeof(*state->plane_states), GFP_KERNEL);
80 if (!state->plane_states)
81 goto fail;
Daniel Vetterf52b69f12014-11-19 18:38:08 +010082 state->connectors = kcalloc(state->num_connector,
Daniel Vettercc4ceb42014-07-25 21:30:38 +020083 sizeof(*state->connectors),
84 GFP_KERNEL);
85 if (!state->connectors)
86 goto fail;
Daniel Vetterf52b69f12014-11-19 18:38:08 +010087 state->connector_states = kcalloc(state->num_connector,
Daniel Vettercc4ceb42014-07-25 21:30:38 +020088 sizeof(*state->connector_states),
89 GFP_KERNEL);
90 if (!state->connector_states)
91 goto fail;
92
93 state->dev = dev;
94
95 DRM_DEBUG_KMS("Allocate atomic state %p\n", state);
96
97 return state;
98fail:
99 kfree_state(state);
100
101 return NULL;
102}
103EXPORT_SYMBOL(drm_atomic_state_alloc);
104
105/**
106 * drm_atomic_state_clear - clear state object
107 * @state: atomic state
108 *
109 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
110 * all locks. So someone else could sneak in and change the current modeset
111 * configuration. Which means that all the state assembled in @state is no
112 * longer an atomic update to the current state, but to some arbitrary earlier
113 * state. Which could break assumptions the driver's ->atomic_check likely
114 * relies on.
115 *
116 * Hence we must clear all cached state and completely start over, using this
117 * function.
118 */
119void drm_atomic_state_clear(struct drm_atomic_state *state)
120{
121 struct drm_device *dev = state->dev;
Daniel Vetter6f75cea2014-11-19 18:38:07 +0100122 struct drm_mode_config *config = &dev->mode_config;
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200123 int i;
124
125 DRM_DEBUG_KMS("Clearing atomic state %p\n", state);
126
Daniel Vetterf52b69f12014-11-19 18:38:08 +0100127 for (i = 0; i < state->num_connector; i++) {
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200128 struct drm_connector *connector = state->connectors[i];
129
130 if (!connector)
131 continue;
132
Daniel Vetter6f75cea2014-11-19 18:38:07 +0100133 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
134
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200135 connector->funcs->atomic_destroy_state(connector,
136 state->connector_states[i]);
Ander Conselvan de Oliveira94692442015-01-23 09:27:59 +0200137 state->connector_states[i] = NULL;
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200138 }
139
Daniel Vetter6f75cea2014-11-19 18:38:07 +0100140 for (i = 0; i < config->num_crtc; i++) {
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200141 struct drm_crtc *crtc = state->crtcs[i];
142
143 if (!crtc)
144 continue;
145
146 crtc->funcs->atomic_destroy_state(crtc,
147 state->crtc_states[i]);
Ander Conselvan de Oliveira94692442015-01-23 09:27:59 +0200148 state->crtc_states[i] = NULL;
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200149 }
150
Daniel Vetter6f75cea2014-11-19 18:38:07 +0100151 for (i = 0; i < config->num_total_plane; i++) {
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200152 struct drm_plane *plane = state->planes[i];
153
154 if (!plane)
155 continue;
156
157 plane->funcs->atomic_destroy_state(plane,
158 state->plane_states[i]);
Ander Conselvan de Oliveira94692442015-01-23 09:27:59 +0200159 state->plane_states[i] = NULL;
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200160 }
161}
162EXPORT_SYMBOL(drm_atomic_state_clear);
163
164/**
165 * drm_atomic_state_free - free all memory for an atomic state
166 * @state: atomic state to deallocate
167 *
168 * This frees all memory associated with an atomic state, including all the
169 * per-object state for planes, crtcs and connectors.
170 */
171void drm_atomic_state_free(struct drm_atomic_state *state)
172{
173 drm_atomic_state_clear(state);
174
175 DRM_DEBUG_KMS("Freeing atomic state %p\n", state);
176
177 kfree_state(state);
178}
179EXPORT_SYMBOL(drm_atomic_state_free);
180
181/**
182 * drm_atomic_get_crtc_state - get crtc state
183 * @state: global atomic state object
184 * @crtc: crtc to get state object for
185 *
186 * This function returns the crtc state for the given crtc, allocating it if
187 * needed. It will also grab the relevant crtc lock to make sure that the state
188 * is consistent.
189 *
190 * Returns:
191 *
192 * Either the allocated state or the error code encoded into the pointer. When
193 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
194 * entire atomic sequence must be restarted. All other errors are fatal.
195 */
196struct drm_crtc_state *
197drm_atomic_get_crtc_state(struct drm_atomic_state *state,
198 struct drm_crtc *crtc)
199{
200 int ret, index;
201 struct drm_crtc_state *crtc_state;
202
203 index = drm_crtc_index(crtc);
204
205 if (state->crtc_states[index])
206 return state->crtc_states[index];
207
208 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
209 if (ret)
210 return ERR_PTR(ret);
211
212 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
213 if (!crtc_state)
214 return ERR_PTR(-ENOMEM);
215
216 state->crtc_states[index] = crtc_state;
217 state->crtcs[index] = crtc;
218 crtc_state->state = state;
219
220 DRM_DEBUG_KMS("Added [CRTC:%d] %p state to %p\n",
221 crtc->base.id, crtc_state, state);
222
223 return crtc_state;
224}
225EXPORT_SYMBOL(drm_atomic_get_crtc_state);
226
227/**
Rob Clark40ecc692014-12-18 16:01:46 -0500228 * drm_atomic_crtc_set_property - set property on CRTC
229 * @crtc: the drm CRTC to set a property on
230 * @state: the state object to update with the new property value
231 * @property: the property to set
232 * @val: the new property value
233 *
234 * Use this instead of calling crtc->atomic_set_property directly.
235 * This function handles generic/core properties and calls out to
236 * driver's ->atomic_set_property() for driver properties. To ensure
237 * consistent behavior you must call this function rather than the
238 * driver hook directly.
239 *
240 * RETURNS:
241 * Zero on success, error code on failure
242 */
243int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
244 struct drm_crtc_state *state, struct drm_property *property,
245 uint64_t val)
246{
Daniel Vettereab3bbe2015-01-22 16:36:21 +0100247 struct drm_device *dev = crtc->dev;
248 struct drm_mode_config *config = &dev->mode_config;
249
250 /* FIXME: Mode prop is missing, which also controls ->enable. */
251 if (property == config->prop_active) {
252 state->active = val;
253 } else if (crtc->funcs->atomic_set_property)
Rob Clark40ecc692014-12-18 16:01:46 -0500254 return crtc->funcs->atomic_set_property(crtc, state, property, val);
255 return -EINVAL;
256}
257EXPORT_SYMBOL(drm_atomic_crtc_set_property);
258
Daniel Vettera97df1c2014-12-18 22:49:02 +0100259/*
Rob Clarkac9c9252014-12-18 16:01:47 -0500260 * This function handles generic/core properties and calls out to
261 * driver's ->atomic_get_property() for driver properties. To ensure
262 * consistent behavior you must call this function rather than the
263 * driver hook directly.
Rob Clarkac9c9252014-12-18 16:01:47 -0500264 */
265int drm_atomic_crtc_get_property(struct drm_crtc *crtc,
266 const struct drm_crtc_state *state,
267 struct drm_property *property, uint64_t *val)
268{
269 if (crtc->funcs->atomic_get_property)
270 return crtc->funcs->atomic_get_property(crtc, state, property, val);
271 return -EINVAL;
272}
Rob Clarkac9c9252014-12-18 16:01:47 -0500273
274/**
Rob Clark5e743732014-12-18 16:01:51 -0500275 * drm_atomic_crtc_check - check crtc state
276 * @crtc: crtc to check
277 * @state: crtc state to check
278 *
279 * Provides core sanity checks for crtc state.
280 *
281 * RETURNS:
282 * Zero on success, error code on failure
283 */
284static int drm_atomic_crtc_check(struct drm_crtc *crtc,
285 struct drm_crtc_state *state)
286{
287 /* NOTE: we explicitly don't enforce constraints such as primary
288 * layer covering entire screen, since that is something we want
289 * to allow (on hw that supports it). For hw that does not, it
290 * should be checked in driver's crtc->atomic_check() vfunc.
291 *
292 * TODO: Add generic modeset state checks once we support those.
293 */
Daniel Vettereab3bbe2015-01-22 16:36:21 +0100294
295 if (state->active && !state->enable) {
296 DRM_DEBUG_KMS("[CRTC:%d] active without enabled\n",
297 crtc->base.id);
298 return -EINVAL;
299 }
300
Rob Clark5e743732014-12-18 16:01:51 -0500301 return 0;
302}
303
304/**
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200305 * drm_atomic_get_plane_state - get plane state
306 * @state: global atomic state object
307 * @plane: plane to get state object for
308 *
309 * This function returns the plane state for the given plane, allocating it if
310 * needed. It will also grab the relevant plane lock to make sure that the state
311 * is consistent.
312 *
313 * Returns:
314 *
315 * Either the allocated state or the error code encoded into the pointer. When
316 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
317 * entire atomic sequence must be restarted. All other errors are fatal.
318 */
319struct drm_plane_state *
320drm_atomic_get_plane_state(struct drm_atomic_state *state,
321 struct drm_plane *plane)
322{
323 int ret, index;
324 struct drm_plane_state *plane_state;
325
326 index = drm_plane_index(plane);
327
328 if (state->plane_states[index])
329 return state->plane_states[index];
330
Daniel Vetter4d02e2d2014-11-11 10:12:00 +0100331 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200332 if (ret)
333 return ERR_PTR(ret);
334
335 plane_state = plane->funcs->atomic_duplicate_state(plane);
336 if (!plane_state)
337 return ERR_PTR(-ENOMEM);
338
339 state->plane_states[index] = plane_state;
340 state->planes[index] = plane;
341 plane_state->state = state;
342
343 DRM_DEBUG_KMS("Added [PLANE:%d] %p state to %p\n",
344 plane->base.id, plane_state, state);
345
346 if (plane_state->crtc) {
347 struct drm_crtc_state *crtc_state;
348
349 crtc_state = drm_atomic_get_crtc_state(state,
350 plane_state->crtc);
351 if (IS_ERR(crtc_state))
352 return ERR_CAST(crtc_state);
353 }
354
355 return plane_state;
356}
357EXPORT_SYMBOL(drm_atomic_get_plane_state);
358
359/**
Rob Clark40ecc692014-12-18 16:01:46 -0500360 * drm_atomic_plane_set_property - set property on plane
361 * @plane: the drm plane to set a property on
362 * @state: the state object to update with the new property value
363 * @property: the property to set
364 * @val: the new property value
365 *
366 * Use this instead of calling plane->atomic_set_property directly.
367 * This function handles generic/core properties and calls out to
368 * driver's ->atomic_set_property() for driver properties. To ensure
369 * consistent behavior you must call this function rather than the
370 * driver hook directly.
371 *
372 * RETURNS:
373 * Zero on success, error code on failure
374 */
375int drm_atomic_plane_set_property(struct drm_plane *plane,
376 struct drm_plane_state *state, struct drm_property *property,
377 uint64_t val)
378{
Rob Clark6b4959f2014-12-18 16:01:53 -0500379 struct drm_device *dev = plane->dev;
380 struct drm_mode_config *config = &dev->mode_config;
381
382 if (property == config->prop_fb_id) {
383 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val);
384 drm_atomic_set_fb_for_plane(state, fb);
385 if (fb)
386 drm_framebuffer_unreference(fb);
387 } else if (property == config->prop_crtc_id) {
388 struct drm_crtc *crtc = drm_crtc_find(dev, val);
389 return drm_atomic_set_crtc_for_plane(state, crtc);
390 } else if (property == config->prop_crtc_x) {
391 state->crtc_x = U642I64(val);
392 } else if (property == config->prop_crtc_y) {
393 state->crtc_y = U642I64(val);
394 } else if (property == config->prop_crtc_w) {
395 state->crtc_w = val;
396 } else if (property == config->prop_crtc_h) {
397 state->crtc_h = val;
398 } else if (property == config->prop_src_x) {
399 state->src_x = val;
400 } else if (property == config->prop_src_y) {
401 state->src_y = val;
402 } else if (property == config->prop_src_w) {
403 state->src_w = val;
404 } else if (property == config->prop_src_h) {
405 state->src_h = val;
Matt Roper1da30622015-01-21 16:35:40 -0800406 } else if (property == config->rotation_property) {
407 state->rotation = val;
Rob Clark6b4959f2014-12-18 16:01:53 -0500408 } else if (plane->funcs->atomic_set_property) {
409 return plane->funcs->atomic_set_property(plane, state,
410 property, val);
411 } else {
412 return -EINVAL;
413 }
414
415 return 0;
Rob Clark40ecc692014-12-18 16:01:46 -0500416}
417EXPORT_SYMBOL(drm_atomic_plane_set_property);
418
Daniel Vettera97df1c2014-12-18 22:49:02 +0100419/*
Rob Clarkac9c9252014-12-18 16:01:47 -0500420 * This function handles generic/core properties and calls out to
421 * driver's ->atomic_get_property() for driver properties. To ensure
422 * consistent behavior you must call this function rather than the
423 * driver hook directly.
Rob Clarkac9c9252014-12-18 16:01:47 -0500424 */
Daniel Vettera97df1c2014-12-18 22:49:02 +0100425static int
426drm_atomic_plane_get_property(struct drm_plane *plane,
Rob Clarkac9c9252014-12-18 16:01:47 -0500427 const struct drm_plane_state *state,
428 struct drm_property *property, uint64_t *val)
429{
Rob Clark6b4959f2014-12-18 16:01:53 -0500430 struct drm_device *dev = plane->dev;
431 struct drm_mode_config *config = &dev->mode_config;
432
433 if (property == config->prop_fb_id) {
434 *val = (state->fb) ? state->fb->base.id : 0;
435 } else if (property == config->prop_crtc_id) {
436 *val = (state->crtc) ? state->crtc->base.id : 0;
437 } else if (property == config->prop_crtc_x) {
438 *val = I642U64(state->crtc_x);
439 } else if (property == config->prop_crtc_y) {
440 *val = I642U64(state->crtc_y);
441 } else if (property == config->prop_crtc_w) {
442 *val = state->crtc_w;
443 } else if (property == config->prop_crtc_h) {
444 *val = state->crtc_h;
445 } else if (property == config->prop_src_x) {
446 *val = state->src_x;
447 } else if (property == config->prop_src_y) {
448 *val = state->src_y;
449 } else if (property == config->prop_src_w) {
450 *val = state->src_w;
451 } else if (property == config->prop_src_h) {
452 *val = state->src_h;
453 } else if (plane->funcs->atomic_get_property) {
Rob Clarkac9c9252014-12-18 16:01:47 -0500454 return plane->funcs->atomic_get_property(plane, state, property, val);
Rob Clark6b4959f2014-12-18 16:01:53 -0500455 } else {
456 return -EINVAL;
457 }
458
459 return 0;
Rob Clarkac9c9252014-12-18 16:01:47 -0500460}
Rob Clarkac9c9252014-12-18 16:01:47 -0500461
462/**
Rob Clark5e743732014-12-18 16:01:51 -0500463 * drm_atomic_plane_check - check plane state
464 * @plane: plane to check
465 * @state: plane state to check
466 *
467 * Provides core sanity checks for plane state.
468 *
469 * RETURNS:
470 * Zero on success, error code on failure
471 */
472static int drm_atomic_plane_check(struct drm_plane *plane,
473 struct drm_plane_state *state)
474{
475 unsigned int fb_width, fb_height;
476 unsigned int i;
477
478 /* either *both* CRTC and FB must be set, or neither */
479 if (WARN_ON(state->crtc && !state->fb)) {
480 DRM_DEBUG_KMS("CRTC set but no FB\n");
481 return -EINVAL;
482 } else if (WARN_ON(state->fb && !state->crtc)) {
483 DRM_DEBUG_KMS("FB set but no CRTC\n");
484 return -EINVAL;
485 }
486
487 /* if disabled, we don't care about the rest of the state: */
488 if (!state->crtc)
489 return 0;
490
491 /* Check whether this plane is usable on this CRTC */
492 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
493 DRM_DEBUG_KMS("Invalid crtc for plane\n");
494 return -EINVAL;
495 }
496
497 /* Check whether this plane supports the fb pixel format. */
498 for (i = 0; i < plane->format_count; i++)
499 if (state->fb->pixel_format == plane->format_types[i])
500 break;
501 if (i == plane->format_count) {
502 DRM_DEBUG_KMS("Invalid pixel format %s\n",
503 drm_get_format_name(state->fb->pixel_format));
504 return -EINVAL;
505 }
506
507 /* Give drivers some help against integer overflows */
508 if (state->crtc_w > INT_MAX ||
509 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
510 state->crtc_h > INT_MAX ||
511 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
512 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
513 state->crtc_w, state->crtc_h,
514 state->crtc_x, state->crtc_y);
515 return -ERANGE;
516 }
517
518 fb_width = state->fb->width << 16;
519 fb_height = state->fb->height << 16;
520
521 /* Make sure source coordinates are inside the fb. */
522 if (state->src_w > fb_width ||
523 state->src_x > fb_width - state->src_w ||
524 state->src_h > fb_height ||
525 state->src_y > fb_height - state->src_h) {
526 DRM_DEBUG_KMS("Invalid source coordinates "
527 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
528 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
529 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
530 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
531 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10);
532 return -ENOSPC;
533 }
534
535 return 0;
536}
537
538/**
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200539 * drm_atomic_get_connector_state - get connector state
540 * @state: global atomic state object
541 * @connector: connector to get state object for
542 *
543 * This function returns the connector state for the given connector,
544 * allocating it if needed. It will also grab the relevant connector lock to
545 * make sure that the state is consistent.
546 *
547 * Returns:
548 *
549 * Either the allocated state or the error code encoded into the pointer. When
550 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
551 * entire atomic sequence must be restarted. All other errors are fatal.
552 */
553struct drm_connector_state *
554drm_atomic_get_connector_state(struct drm_atomic_state *state,
555 struct drm_connector *connector)
556{
557 int ret, index;
558 struct drm_mode_config *config = &connector->dev->mode_config;
559 struct drm_connector_state *connector_state;
560
Daniel Vetterc7eb76f2014-11-19 18:38:06 +0100561 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
562 if (ret)
563 return ERR_PTR(ret);
564
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200565 index = drm_connector_index(connector);
566
Daniel Vetterf52b69f12014-11-19 18:38:08 +0100567 /*
568 * Construction of atomic state updates can race with a connector
569 * hot-add which might overflow. In this case flip the table and just
570 * restart the entire ioctl - no one is fast enough to livelock a cpu
571 * with physical hotplug events anyway.
572 *
573 * Note that we only grab the indexes once we have the right lock to
574 * prevent hotplug/unplugging of connectors. So removal is no problem,
575 * at most the array is a bit too large.
576 */
577 if (index >= state->num_connector) {
578 DRM_DEBUG_KMS("Hot-added connector would overflow state array, restarting\n");
Daniel Vetterfc2d2bc2014-11-20 09:53:35 +0100579 return ERR_PTR(-EAGAIN);
Daniel Vetterf52b69f12014-11-19 18:38:08 +0100580 }
581
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200582 if (state->connector_states[index])
583 return state->connector_states[index];
584
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200585 connector_state = connector->funcs->atomic_duplicate_state(connector);
586 if (!connector_state)
587 return ERR_PTR(-ENOMEM);
588
589 state->connector_states[index] = connector_state;
590 state->connectors[index] = connector;
591 connector_state->state = state;
592
593 DRM_DEBUG_KMS("Added [CONNECTOR:%d] %p state to %p\n",
594 connector->base.id, connector_state, state);
595
596 if (connector_state->crtc) {
597 struct drm_crtc_state *crtc_state;
598
599 crtc_state = drm_atomic_get_crtc_state(state,
600 connector_state->crtc);
601 if (IS_ERR(crtc_state))
602 return ERR_CAST(crtc_state);
603 }
604
605 return connector_state;
606}
607EXPORT_SYMBOL(drm_atomic_get_connector_state);
608
609/**
Rob Clark40ecc692014-12-18 16:01:46 -0500610 * drm_atomic_connector_set_property - set property on connector.
611 * @connector: the drm connector to set a property on
612 * @state: the state object to update with the new property value
613 * @property: the property to set
614 * @val: the new property value
615 *
616 * Use this instead of calling connector->atomic_set_property directly.
617 * This function handles generic/core properties and calls out to
618 * driver's ->atomic_set_property() for driver properties. To ensure
619 * consistent behavior you must call this function rather than the
620 * driver hook directly.
621 *
622 * RETURNS:
623 * Zero on success, error code on failure
624 */
625int drm_atomic_connector_set_property(struct drm_connector *connector,
626 struct drm_connector_state *state, struct drm_property *property,
627 uint64_t val)
628{
629 struct drm_device *dev = connector->dev;
630 struct drm_mode_config *config = &dev->mode_config;
631
Rob Clarkae16c592014-12-18 16:01:54 -0500632 if (property == config->prop_crtc_id) {
633 struct drm_crtc *crtc = drm_crtc_find(dev, val);
634 return drm_atomic_set_crtc_for_connector(state, crtc);
635 } else if (property == config->dpms_property) {
Rob Clark40ecc692014-12-18 16:01:46 -0500636 /* setting DPMS property requires special handling, which
637 * is done in legacy setprop path for us. Disallow (for
638 * now?) atomic writes to DPMS property:
639 */
640 return -EINVAL;
641 } else if (connector->funcs->atomic_set_property) {
642 return connector->funcs->atomic_set_property(connector,
643 state, property, val);
644 } else {
645 return -EINVAL;
646 }
647}
648EXPORT_SYMBOL(drm_atomic_connector_set_property);
649
Daniel Vettera97df1c2014-12-18 22:49:02 +0100650/*
Rob Clarkac9c9252014-12-18 16:01:47 -0500651 * This function handles generic/core properties and calls out to
652 * driver's ->atomic_get_property() for driver properties. To ensure
653 * consistent behavior you must call this function rather than the
654 * driver hook directly.
Rob Clarkac9c9252014-12-18 16:01:47 -0500655 */
Daniel Vettera97df1c2014-12-18 22:49:02 +0100656static int
657drm_atomic_connector_get_property(struct drm_connector *connector,
Rob Clarkac9c9252014-12-18 16:01:47 -0500658 const struct drm_connector_state *state,
659 struct drm_property *property, uint64_t *val)
660{
661 struct drm_device *dev = connector->dev;
662 struct drm_mode_config *config = &dev->mode_config;
663
Rob Clarkae16c592014-12-18 16:01:54 -0500664 if (property == config->prop_crtc_id) {
665 *val = (state->crtc) ? state->crtc->base.id : 0;
666 } else if (property == config->dpms_property) {
Rob Clarkac9c9252014-12-18 16:01:47 -0500667 *val = connector->dpms;
668 } else if (connector->funcs->atomic_get_property) {
669 return connector->funcs->atomic_get_property(connector,
670 state, property, val);
671 } else {
672 return -EINVAL;
673 }
674
675 return 0;
676}
Rob Clarkac9c9252014-12-18 16:01:47 -0500677
Rob Clark88a48e22014-12-18 16:01:50 -0500678int drm_atomic_get_property(struct drm_mode_object *obj,
679 struct drm_property *property, uint64_t *val)
680{
681 struct drm_device *dev = property->dev;
682 int ret;
683
684 switch (obj->type) {
685 case DRM_MODE_OBJECT_CONNECTOR: {
686 struct drm_connector *connector = obj_to_connector(obj);
687 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
688 ret = drm_atomic_connector_get_property(connector,
689 connector->state, property, val);
690 break;
691 }
692 case DRM_MODE_OBJECT_CRTC: {
693 struct drm_crtc *crtc = obj_to_crtc(obj);
694 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
695 ret = drm_atomic_crtc_get_property(crtc,
696 crtc->state, property, val);
697 break;
698 }
699 case DRM_MODE_OBJECT_PLANE: {
700 struct drm_plane *plane = obj_to_plane(obj);
701 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
702 ret = drm_atomic_plane_get_property(plane,
703 plane->state, property, val);
704 break;
705 }
706 default:
707 ret = -EINVAL;
708 break;
709 }
710
711 return ret;
712}
713
714/**
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200715 * drm_atomic_set_crtc_for_plane - set crtc for plane
Daniel Vetter07cc0ef2014-11-27 15:49:39 +0100716 * @plane_state: the plane whose incoming state to update
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200717 * @crtc: crtc to use for the plane
718 *
719 * Changing the assigned crtc for a plane requires us to grab the lock and state
720 * for the new crtc, as needed. This function takes care of all these details
721 * besides updating the pointer in the state object itself.
722 *
723 * Returns:
724 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
725 * then the w/w mutex code has detected a deadlock and the entire atomic
726 * sequence must be restarted. All other errors are fatal.
727 */
728int
Daniel Vetter07cc0ef2014-11-27 15:49:39 +0100729drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
730 struct drm_crtc *crtc)
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200731{
Daniel Vetter07cc0ef2014-11-27 15:49:39 +0100732 struct drm_plane *plane = plane_state->plane;
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200733 struct drm_crtc_state *crtc_state;
734
Rob Clark6ddd3882014-11-21 15:28:31 -0500735 if (plane_state->crtc) {
736 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
737 plane_state->crtc);
738 if (WARN_ON(IS_ERR(crtc_state)))
739 return PTR_ERR(crtc_state);
740
741 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
742 }
743
744 plane_state->crtc = crtc;
745
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200746 if (crtc) {
747 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
748 crtc);
749 if (IS_ERR(crtc_state))
750 return PTR_ERR(crtc_state);
Rob Clark6ddd3882014-11-21 15:28:31 -0500751 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200752 }
753
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200754 if (crtc)
755 DRM_DEBUG_KMS("Link plane state %p to [CRTC:%d]\n",
756 plane_state, crtc->base.id);
757 else
758 DRM_DEBUG_KMS("Link plane state %p to [NOCRTC]\n", plane_state);
759
760 return 0;
761}
762EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
763
764/**
Daniel Vetter321ebf02014-11-04 22:57:27 +0100765 * drm_atomic_set_fb_for_plane - set crtc for plane
766 * @plane_state: atomic state object for the plane
767 * @fb: fb to use for the plane
768 *
769 * Changing the assigned framebuffer for a plane requires us to grab a reference
770 * to the new fb and drop the reference to the old fb, if there is one. This
771 * function takes care of all these details besides updating the pointer in the
772 * state object itself.
773 */
774void
775drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
776 struct drm_framebuffer *fb)
777{
778 if (plane_state->fb)
779 drm_framebuffer_unreference(plane_state->fb);
780 if (fb)
781 drm_framebuffer_reference(fb);
782 plane_state->fb = fb;
783
784 if (fb)
785 DRM_DEBUG_KMS("Set [FB:%d] for plane state %p\n",
786 fb->base.id, plane_state);
787 else
788 DRM_DEBUG_KMS("Set [NOFB] for plane state %p\n", plane_state);
789}
790EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
791
792/**
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200793 * drm_atomic_set_crtc_for_connector - set crtc for connector
794 * @conn_state: atomic state object for the connector
795 * @crtc: crtc to use for the connector
796 *
797 * Changing the assigned crtc for a connector requires us to grab the lock and
798 * state for the new crtc, as needed. This function takes care of all these
799 * details besides updating the pointer in the state object itself.
800 *
801 * Returns:
802 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
803 * then the w/w mutex code has detected a deadlock and the entire atomic
804 * sequence must be restarted. All other errors are fatal.
805 */
806int
807drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
808 struct drm_crtc *crtc)
809{
810 struct drm_crtc_state *crtc_state;
811
812 if (crtc) {
813 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
814 if (IS_ERR(crtc_state))
815 return PTR_ERR(crtc_state);
816 }
817
818 conn_state->crtc = crtc;
819
820 if (crtc)
821 DRM_DEBUG_KMS("Link connector state %p to [CRTC:%d]\n",
822 conn_state, crtc->base.id);
823 else
824 DRM_DEBUG_KMS("Link connector state %p to [NOCRTC]\n",
825 conn_state);
826
827 return 0;
828}
829EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
830
831/**
832 * drm_atomic_add_affected_connectors - add connectors for crtc
833 * @state: atomic state
834 * @crtc: DRM crtc
835 *
836 * This function walks the current configuration and adds all connectors
837 * currently using @crtc to the atomic configuration @state. Note that this
838 * function must acquire the connection mutex. This can potentially cause
839 * unneeded seralization if the update is just for the planes on one crtc. Hence
840 * drivers and helpers should only call this when really needed (e.g. when a
841 * full modeset needs to happen due to some change).
842 *
843 * Returns:
844 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
845 * then the w/w mutex code has detected a deadlock and the entire atomic
846 * sequence must be restarted. All other errors are fatal.
847 */
848int
849drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
850 struct drm_crtc *crtc)
851{
852 struct drm_mode_config *config = &state->dev->mode_config;
853 struct drm_connector *connector;
854 struct drm_connector_state *conn_state;
855 int ret;
856
857 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
858 if (ret)
859 return ret;
860
861 DRM_DEBUG_KMS("Adding all current connectors for [CRTC:%d] to %p\n",
862 crtc->base.id, state);
863
864 /*
865 * Changed connectors are already in @state, so only need to look at the
866 * current configuration.
867 */
868 list_for_each_entry(connector, &config->connector_list, head) {
869 if (connector->state->crtc != crtc)
870 continue;
871
872 conn_state = drm_atomic_get_connector_state(state, connector);
873 if (IS_ERR(conn_state))
874 return PTR_ERR(conn_state);
875 }
876
877 return 0;
878}
879EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
880
881/**
882 * drm_atomic_connectors_for_crtc - count number of connected outputs
883 * @state: atomic state
884 * @crtc: DRM crtc
885 *
886 * This function counts all connectors which will be connected to @crtc
887 * according to @state. Useful to recompute the enable state for @crtc.
888 */
889int
890drm_atomic_connectors_for_crtc(struct drm_atomic_state *state,
891 struct drm_crtc *crtc)
892{
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200893 int i, num_connected_connectors = 0;
894
Daniel Vetterf52b69f12014-11-19 18:38:08 +0100895 for (i = 0; i < state->num_connector; i++) {
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200896 struct drm_connector_state *conn_state;
897
898 conn_state = state->connector_states[i];
899
900 if (conn_state && conn_state->crtc == crtc)
901 num_connected_connectors++;
902 }
903
904 DRM_DEBUG_KMS("State %p has %i connectors for [CRTC:%d]\n",
905 state, num_connected_connectors, crtc->base.id);
906
907 return num_connected_connectors;
908}
909EXPORT_SYMBOL(drm_atomic_connectors_for_crtc);
910
911/**
912 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls
913 * @state: atomic state
914 *
915 * This function should be used by legacy entry points which don't understand
916 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after
917 * the slowpath completed.
918 */
919void drm_atomic_legacy_backoff(struct drm_atomic_state *state)
920{
921 int ret;
922
923retry:
924 drm_modeset_backoff(state->acquire_ctx);
925
926 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
927 state->acquire_ctx);
928 if (ret)
929 goto retry;
930 ret = drm_modeset_lock_all_crtcs(state->dev,
931 state->acquire_ctx);
932 if (ret)
933 goto retry;
934}
935EXPORT_SYMBOL(drm_atomic_legacy_backoff);
936
937/**
938 * drm_atomic_check_only - check whether a given config would work
939 * @state: atomic configuration to check
940 *
941 * Note that this function can return -EDEADLK if the driver needed to acquire
942 * more locks but encountered a deadlock. The caller must then do the usual w/w
943 * backoff dance and restart. All other errors are fatal.
944 *
945 * Returns:
946 * 0 on success, negative error code on failure.
947 */
948int drm_atomic_check_only(struct drm_atomic_state *state)
949{
Rob Clark5e743732014-12-18 16:01:51 -0500950 struct drm_device *dev = state->dev;
951 struct drm_mode_config *config = &dev->mode_config;
952 int nplanes = config->num_total_plane;
953 int ncrtcs = config->num_crtc;
954 int i, ret = 0;
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200955
956 DRM_DEBUG_KMS("checking %p\n", state);
957
Rob Clark5e743732014-12-18 16:01:51 -0500958 for (i = 0; i < nplanes; i++) {
959 struct drm_plane *plane = state->planes[i];
960
961 if (!plane)
962 continue;
963
964 ret = drm_atomic_plane_check(plane, state->plane_states[i]);
965 if (ret) {
966 DRM_DEBUG_KMS("[PLANE:%d] atomic core check failed\n",
967 plane->base.id);
968 return ret;
969 }
970 }
971
972 for (i = 0; i < ncrtcs; i++) {
973 struct drm_crtc *crtc = state->crtcs[i];
974
975 if (!crtc)
976 continue;
977
978 ret = drm_atomic_crtc_check(crtc, state->crtc_states[i]);
979 if (ret) {
980 DRM_DEBUG_KMS("[CRTC:%d] atomic core check failed\n",
981 crtc->base.id);
982 return ret;
983 }
984 }
985
Daniel Vettercc4ceb42014-07-25 21:30:38 +0200986 if (config->funcs->atomic_check)
Rob Clark5e743732014-12-18 16:01:51 -0500987 ret = config->funcs->atomic_check(state->dev, state);
988
Rob Clarkd34f20d2014-12-18 16:01:56 -0500989 if (!state->allow_modeset) {
990 for (i = 0; i < ncrtcs; i++) {
991 struct drm_crtc *crtc = state->crtcs[i];
992 struct drm_crtc_state *crtc_state = state->crtc_states[i];
993
994 if (!crtc)
995 continue;
996
Daniel Vettereab3bbe2015-01-22 16:36:21 +0100997 if (crtc_state->mode_changed ||
998 crtc_state->active_changed) {
Rob Clarkd34f20d2014-12-18 16:01:56 -0500999 DRM_DEBUG_KMS("[CRTC:%d] requires full modeset\n",
1000 crtc->base.id);
1001 return -EINVAL;
1002 }
1003 }
1004 }
1005
Rob Clark5e743732014-12-18 16:01:51 -05001006 return ret;
Daniel Vettercc4ceb42014-07-25 21:30:38 +02001007}
1008EXPORT_SYMBOL(drm_atomic_check_only);
1009
1010/**
1011 * drm_atomic_commit - commit configuration atomically
1012 * @state: atomic configuration to check
1013 *
1014 * Note that this function can return -EDEADLK if the driver needed to acquire
1015 * more locks but encountered a deadlock. The caller must then do the usual w/w
1016 * backoff dance and restart. All other errors are fatal.
1017 *
1018 * Also note that on successful execution ownership of @state is transferred
1019 * from the caller of this function to the function itself. The caller must not
1020 * free or in any other way access @state. If the function fails then the caller
1021 * must clean up @state itself.
1022 *
1023 * Returns:
1024 * 0 on success, negative error code on failure.
1025 */
1026int drm_atomic_commit(struct drm_atomic_state *state)
1027{
1028 struct drm_mode_config *config = &state->dev->mode_config;
1029 int ret;
1030
1031 ret = drm_atomic_check_only(state);
1032 if (ret)
1033 return ret;
1034
1035 DRM_DEBUG_KMS("commiting %p\n", state);
1036
1037 return config->funcs->atomic_commit(state->dev, state, false);
1038}
1039EXPORT_SYMBOL(drm_atomic_commit);
1040
1041/**
1042 * drm_atomic_async_commit - atomic&async configuration commit
1043 * @state: atomic configuration to check
1044 *
1045 * Note that this function can return -EDEADLK if the driver needed to acquire
1046 * more locks but encountered a deadlock. The caller must then do the usual w/w
1047 * backoff dance and restart. All other errors are fatal.
1048 *
1049 * Also note that on successful execution ownership of @state is transferred
1050 * from the caller of this function to the function itself. The caller must not
1051 * free or in any other way access @state. If the function fails then the caller
1052 * must clean up @state itself.
1053 *
1054 * Returns:
1055 * 0 on success, negative error code on failure.
1056 */
1057int drm_atomic_async_commit(struct drm_atomic_state *state)
1058{
1059 struct drm_mode_config *config = &state->dev->mode_config;
1060 int ret;
1061
1062 ret = drm_atomic_check_only(state);
1063 if (ret)
1064 return ret;
1065
1066 DRM_DEBUG_KMS("commiting %p asynchronously\n", state);
1067
1068 return config->funcs->atomic_commit(state->dev, state, true);
1069}
1070EXPORT_SYMBOL(drm_atomic_async_commit);
Rob Clarkd34f20d2014-12-18 16:01:56 -05001071
1072/*
1073 * The big monstor ioctl
1074 */
1075
1076static struct drm_pending_vblank_event *create_vblank_event(
1077 struct drm_device *dev, struct drm_file *file_priv, uint64_t user_data)
1078{
1079 struct drm_pending_vblank_event *e = NULL;
1080 unsigned long flags;
1081
1082 spin_lock_irqsave(&dev->event_lock, flags);
1083 if (file_priv->event_space < sizeof e->event) {
1084 spin_unlock_irqrestore(&dev->event_lock, flags);
1085 goto out;
1086 }
1087 file_priv->event_space -= sizeof e->event;
1088 spin_unlock_irqrestore(&dev->event_lock, flags);
1089
1090 e = kzalloc(sizeof *e, GFP_KERNEL);
1091 if (e == NULL) {
1092 spin_lock_irqsave(&dev->event_lock, flags);
1093 file_priv->event_space += sizeof e->event;
1094 spin_unlock_irqrestore(&dev->event_lock, flags);
1095 goto out;
1096 }
1097
1098 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1099 e->event.base.length = sizeof e->event;
1100 e->event.user_data = user_data;
1101 e->base.event = &e->event.base;
1102 e->base.file_priv = file_priv;
1103 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1104
1105out:
1106 return e;
1107}
1108
1109static void destroy_vblank_event(struct drm_device *dev,
1110 struct drm_file *file_priv, struct drm_pending_vblank_event *e)
1111{
1112 unsigned long flags;
1113
1114 spin_lock_irqsave(&dev->event_lock, flags);
1115 file_priv->event_space += sizeof e->event;
1116 spin_unlock_irqrestore(&dev->event_lock, flags);
1117 kfree(e);
1118}
1119
1120static int atomic_set_prop(struct drm_atomic_state *state,
1121 struct drm_mode_object *obj, struct drm_property *prop,
1122 uint64_t prop_value)
1123{
1124 struct drm_mode_object *ref;
1125 int ret;
1126
1127 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1128 return -EINVAL;
1129
1130 switch (obj->type) {
1131 case DRM_MODE_OBJECT_CONNECTOR: {
1132 struct drm_connector *connector = obj_to_connector(obj);
1133 struct drm_connector_state *connector_state;
1134
1135 connector_state = drm_atomic_get_connector_state(state, connector);
1136 if (IS_ERR(connector_state)) {
1137 ret = PTR_ERR(connector_state);
1138 break;
1139 }
1140
1141 ret = drm_atomic_connector_set_property(connector,
1142 connector_state, prop, prop_value);
1143 break;
1144 }
1145 case DRM_MODE_OBJECT_CRTC: {
1146 struct drm_crtc *crtc = obj_to_crtc(obj);
1147 struct drm_crtc_state *crtc_state;
1148
1149 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1150 if (IS_ERR(crtc_state)) {
1151 ret = PTR_ERR(crtc_state);
1152 break;
1153 }
1154
1155 ret = drm_atomic_crtc_set_property(crtc,
1156 crtc_state, prop, prop_value);
1157 break;
1158 }
1159 case DRM_MODE_OBJECT_PLANE: {
1160 struct drm_plane *plane = obj_to_plane(obj);
1161 struct drm_plane_state *plane_state;
1162
1163 plane_state = drm_atomic_get_plane_state(state, plane);
1164 if (IS_ERR(plane_state)) {
1165 ret = PTR_ERR(plane_state);
1166 break;
1167 }
1168
1169 ret = drm_atomic_plane_set_property(plane,
1170 plane_state, prop, prop_value);
1171 break;
1172 }
1173 default:
1174 ret = -EINVAL;
1175 break;
1176 }
1177
1178 drm_property_change_valid_put(prop, ref);
1179 return ret;
1180}
1181
1182int drm_mode_atomic_ioctl(struct drm_device *dev,
1183 void *data, struct drm_file *file_priv)
1184{
1185 struct drm_mode_atomic *arg = data;
1186 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1187 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1188 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1189 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1190 unsigned int copied_objs, copied_props;
1191 struct drm_atomic_state *state;
1192 struct drm_modeset_acquire_ctx ctx;
1193 struct drm_plane *plane;
1194 unsigned plane_mask = 0;
1195 int ret = 0;
1196 unsigned int i, j;
1197
1198 /* disallow for drivers not supporting atomic: */
1199 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1200 return -EINVAL;
1201
1202 /* disallow for userspace that has not enabled atomic cap (even
1203 * though this may be a bit overkill, since legacy userspace
1204 * wouldn't know how to call this ioctl)
1205 */
1206 if (!file_priv->atomic)
1207 return -EINVAL;
1208
1209 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
1210 return -EINVAL;
1211
1212 if (arg->reserved)
1213 return -EINVAL;
1214
1215 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
1216 !dev->mode_config.async_page_flip)
1217 return -EINVAL;
1218
1219 /* can't test and expect an event at the same time. */
1220 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1221 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1222 return -EINVAL;
1223
1224 drm_modeset_acquire_init(&ctx, 0);
1225
1226 state = drm_atomic_state_alloc(dev);
1227 if (!state)
1228 return -ENOMEM;
1229
1230 state->acquire_ctx = &ctx;
1231 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1232
1233retry:
1234 copied_objs = 0;
1235 copied_props = 0;
1236
1237 for (i = 0; i < arg->count_objs; i++) {
1238 uint32_t obj_id, count_props;
1239 struct drm_mode_object *obj;
1240
1241 if (get_user(obj_id, objs_ptr + copied_objs)) {
1242 ret = -EFAULT;
1243 goto fail;
1244 }
1245
1246 obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY);
1247 if (!obj || !obj->properties) {
1248 ret = -ENOENT;
1249 goto fail;
1250 }
1251
1252 if (obj->type == DRM_MODE_OBJECT_PLANE) {
1253 plane = obj_to_plane(obj);
1254 plane_mask |= (1 << drm_plane_index(plane));
1255 plane->old_fb = plane->fb;
1256 }
1257
1258 if (get_user(count_props, count_props_ptr + copied_objs)) {
1259 ret = -EFAULT;
1260 goto fail;
1261 }
1262
1263 copied_objs++;
1264
1265 for (j = 0; j < count_props; j++) {
1266 uint32_t prop_id;
1267 uint64_t prop_value;
1268 struct drm_property *prop;
1269
1270 if (get_user(prop_id, props_ptr + copied_props)) {
1271 ret = -EFAULT;
1272 goto fail;
1273 }
1274
1275 prop = drm_property_find(dev, prop_id);
1276 if (!prop) {
1277 ret = -ENOENT;
1278 goto fail;
1279 }
1280
Guenter Roeck42c58142015-01-12 21:12:17 -08001281 if (copy_from_user(&prop_value,
1282 prop_values_ptr + copied_props,
1283 sizeof(prop_value))) {
Rob Clarkd34f20d2014-12-18 16:01:56 -05001284 ret = -EFAULT;
1285 goto fail;
1286 }
1287
1288 ret = atomic_set_prop(state, obj, prop, prop_value);
1289 if (ret)
1290 goto fail;
1291
1292 copied_props++;
1293 }
1294 }
1295
1296 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1297 int ncrtcs = dev->mode_config.num_crtc;
1298
1299 for (i = 0; i < ncrtcs; i++) {
1300 struct drm_crtc_state *crtc_state = state->crtc_states[i];
1301 struct drm_pending_vblank_event *e;
1302
1303 if (!crtc_state)
1304 continue;
1305
1306 e = create_vblank_event(dev, file_priv, arg->user_data);
1307 if (!e) {
1308 ret = -ENOMEM;
1309 goto fail;
1310 }
1311
1312 crtc_state->event = e;
1313 }
1314 }
1315
1316 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1317 ret = drm_atomic_check_only(state);
1318 /* _check_only() does not free state, unlike _commit() */
1319 drm_atomic_state_free(state);
1320 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1321 ret = drm_atomic_async_commit(state);
1322 } else {
1323 ret = drm_atomic_commit(state);
1324 }
1325
1326 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
1327 * locks (ie. while it is still safe to deref plane->state). We
1328 * need to do this here because the driver entry points cannot
1329 * distinguish between legacy and atomic ioctls.
1330 */
1331 drm_for_each_plane_mask(plane, dev, plane_mask) {
1332 if (ret == 0) {
1333 struct drm_framebuffer *new_fb = plane->state->fb;
1334 if (new_fb)
1335 drm_framebuffer_reference(new_fb);
1336 plane->fb = new_fb;
1337 plane->crtc = plane->state->crtc;
1338 } else {
1339 plane->old_fb = NULL;
1340 }
1341 if (plane->old_fb) {
1342 drm_framebuffer_unreference(plane->old_fb);
1343 plane->old_fb = NULL;
1344 }
1345 }
1346
1347 drm_modeset_drop_locks(&ctx);
1348 drm_modeset_acquire_fini(&ctx);
1349
1350 return ret;
1351
1352fail:
1353 if (ret == -EDEADLK)
1354 goto backoff;
1355
1356 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1357 int ncrtcs = dev->mode_config.num_crtc;
1358
1359 for (i = 0; i < ncrtcs; i++) {
1360 struct drm_crtc_state *crtc_state = state->crtc_states[i];
1361
1362 if (!crtc_state)
1363 continue;
1364
1365 destroy_vblank_event(dev, file_priv, crtc_state->event);
1366 crtc_state->event = NULL;
1367 }
1368 }
1369
1370 drm_atomic_state_free(state);
1371
1372 drm_modeset_drop_locks(&ctx);
1373 drm_modeset_acquire_fini(&ctx);
1374
1375 return ret;
1376
1377backoff:
1378 drm_atomic_state_clear(state);
1379 drm_modeset_backoff(&ctx);
1380
1381 goto retry;
1382}