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1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 * Copyright (C) 2018 Intel Corp.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Rob Clark <robdclark@gmail.com>
26 * Daniel Vetter <daniel.vetter@ffwll.ch>
27 */
28
29#include <drm/drm_atomic_uapi.h>
30#include <drm/drm_atomic.h>
31#include <drm/drm_print.h>
32#include <drm/drm_drv.h>
33#include <drm/drm_writeback.h>
34#include <drm/drm_vblank.h>
35
36#include <linux/dma-fence.h>
37#include <linux/uaccess.h>
38#include <linux/sync_file.h>
39#include <linux/file.h>
40
41#include "drm_crtc_internal.h"
42
43/**
44 * DOC: overview
45 *
46 * This file contains the marshalling and demarshalling glue for the atomic UAPI
47 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and
48 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and
49 * drivers which have special needs to construct their own atomic updates, e.g.
50 * for load detect or similiar.
51 */
52
53/**
54 * drm_atomic_set_mode_for_crtc - set mode for CRTC
55 * @state: the CRTC whose incoming state to update
56 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
57 *
58 * Set a mode (originating from the kernel) on the desired CRTC state and update
59 * the enable property.
60 *
61 * RETURNS:
62 * Zero on success, error code on failure. Cannot return -EDEADLK.
63 */
64int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
65 const struct drm_display_mode *mode)
66{
67 struct drm_crtc *crtc = state->crtc;
68 struct drm_mode_modeinfo umode;
69
70 /* Early return for no change. */
71 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
72 return 0;
73
74 drm_property_blob_put(state->mode_blob);
75 state->mode_blob = NULL;
76
77 if (mode) {
78 drm_mode_convert_to_umode(&umode, mode);
79 state->mode_blob =
80 drm_property_create_blob(state->crtc->dev,
81 sizeof(umode),
82 &umode);
83 if (IS_ERR(state->mode_blob))
84 return PTR_ERR(state->mode_blob);
85
86 drm_mode_copy(&state->mode, mode);
87 state->enable = true;
88 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
89 mode->name, crtc->base.id, crtc->name, state);
90 } else {
91 memset(&state->mode, 0, sizeof(state->mode));
92 state->enable = false;
93 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
94 crtc->base.id, crtc->name, state);
95 }
96
97 return 0;
98}
99EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
100
101/**
102 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
103 * @state: the CRTC whose incoming state to update
104 * @blob: pointer to blob property to use for mode
105 *
106 * Set a mode (originating from a blob property) on the desired CRTC state.
107 * This function will take a reference on the blob property for the CRTC state,
108 * and release the reference held on the state's existing mode property, if any
109 * was set.
110 *
111 * RETURNS:
112 * Zero on success, error code on failure. Cannot return -EDEADLK.
113 */
114int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
115 struct drm_property_blob *blob)
116{
117 struct drm_crtc *crtc = state->crtc;
118
119 if (blob == state->mode_blob)
120 return 0;
121
122 drm_property_blob_put(state->mode_blob);
123 state->mode_blob = NULL;
124
125 memset(&state->mode, 0, sizeof(state->mode));
126
127 if (blob) {
128 int ret;
129
130 if (blob->length != sizeof(struct drm_mode_modeinfo)) {
131 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] bad mode blob length: %zu\n",
132 crtc->base.id, crtc->name,
133 blob->length);
134 return -EINVAL;
135 }
136
137 ret = drm_mode_convert_umode(crtc->dev,
138 &state->mode, blob->data);
139 if (ret) {
140 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n",
141 crtc->base.id, crtc->name,
142 ret, drm_get_mode_status_name(state->mode.status));
143 drm_mode_debug_printmodeline(&state->mode);
144 return -EINVAL;
145 }
146
147 state->mode_blob = drm_property_blob_get(blob);
148 state->enable = true;
149 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
150 state->mode.name, crtc->base.id, crtc->name,
151 state);
152 } else {
153 state->enable = false;
154 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
155 crtc->base.id, crtc->name, state);
156 }
157
158 return 0;
159}
160EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
161
162/**
163 * drm_atomic_set_crtc_for_plane - set crtc for plane
164 * @plane_state: the plane whose incoming state to update
165 * @crtc: crtc to use for the plane
166 *
167 * Changing the assigned crtc for a plane requires us to grab the lock and state
168 * for the new crtc, as needed. This function takes care of all these details
169 * besides updating the pointer in the state object itself.
170 *
171 * Returns:
172 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
173 * then the w/w mutex code has detected a deadlock and the entire atomic
174 * sequence must be restarted. All other errors are fatal.
175 */
176int
177drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
178 struct drm_crtc *crtc)
179{
180 struct drm_plane *plane = plane_state->plane;
181 struct drm_crtc_state *crtc_state;
182 /* Nothing to do for same crtc*/
183 if (plane_state->crtc == crtc)
184 return 0;
185 if (plane_state->crtc) {
186 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
187 plane_state->crtc);
188 if (WARN_ON(IS_ERR(crtc_state)))
189 return PTR_ERR(crtc_state);
190
191 crtc_state->plane_mask &= ~drm_plane_mask(plane);
192 }
193
194 plane_state->crtc = crtc;
195
196 if (crtc) {
197 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
198 crtc);
199 if (IS_ERR(crtc_state))
200 return PTR_ERR(crtc_state);
201 crtc_state->plane_mask |= drm_plane_mask(plane);
202 }
203
204 if (crtc)
205 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n",
206 plane->base.id, plane->name, plane_state,
207 crtc->base.id, crtc->name);
208 else
209 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [NOCRTC]\n",
210 plane->base.id, plane->name, plane_state);
211
212 return 0;
213}
214EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
215
216/**
217 * drm_atomic_set_fb_for_plane - set framebuffer for plane
218 * @plane_state: atomic state object for the plane
219 * @fb: fb to use for the plane
220 *
221 * Changing the assigned framebuffer for a plane requires us to grab a reference
222 * to the new fb and drop the reference to the old fb, if there is one. This
223 * function takes care of all these details besides updating the pointer in the
224 * state object itself.
225 */
226void
227drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
228 struct drm_framebuffer *fb)
229{
230 struct drm_plane *plane = plane_state->plane;
231
232 if (fb)
233 DRM_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n",
234 fb->base.id, plane->base.id, plane->name,
235 plane_state);
236 else
237 DRM_DEBUG_ATOMIC("Set [NOFB] for [PLANE:%d:%s] state %p\n",
238 plane->base.id, plane->name, plane_state);
239
240 drm_framebuffer_assign(&plane_state->fb, fb);
241}
242EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
243
244/**
245 * drm_atomic_set_fence_for_plane - set fence for plane
246 * @plane_state: atomic state object for the plane
247 * @fence: dma_fence to use for the plane
248 *
249 * Helper to setup the plane_state fence in case it is not set yet.
250 * By using this drivers doesn't need to worry if the user choose
251 * implicit or explicit fencing.
252 *
253 * This function will not set the fence to the state if it was set
254 * via explicit fencing interfaces on the atomic ioctl. In that case it will
255 * drop the reference to the fence as we are not storing it anywhere.
256 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
257 * with the received implicit fence. In both cases this function consumes a
258 * reference for @fence.
259 *
260 * This way explicit fencing can be used to overrule implicit fencing, which is
261 * important to make explicit fencing use-cases work: One example is using one
262 * buffer for 2 screens with different refresh rates. Implicit fencing will
263 * clamp rendering to the refresh rate of the slower screen, whereas explicit
264 * fence allows 2 independent render and display loops on a single buffer. If a
265 * driver allows obeys both implicit and explicit fences for plane updates, then
266 * it will break all the benefits of explicit fencing.
267 */
268void
269drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
270 struct dma_fence *fence)
271{
272 if (plane_state->fence) {
273 dma_fence_put(fence);
274 return;
275 }
276
277 plane_state->fence = fence;
278}
279EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
280
281/**
282 * drm_atomic_set_crtc_for_connector - set crtc for connector
283 * @conn_state: atomic state object for the connector
284 * @crtc: crtc to use for the connector
285 *
286 * Changing the assigned crtc for a connector requires us to grab the lock and
287 * state for the new crtc, as needed. This function takes care of all these
288 * details besides updating the pointer in the state object itself.
289 *
290 * Returns:
291 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
292 * then the w/w mutex code has detected a deadlock and the entire atomic
293 * sequence must be restarted. All other errors are fatal.
294 */
295int
296drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
297 struct drm_crtc *crtc)
298{
299 struct drm_connector *connector = conn_state->connector;
300 struct drm_crtc_state *crtc_state;
301
302 if (conn_state->crtc == crtc)
303 return 0;
304
305 if (conn_state->crtc) {
306 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
307 conn_state->crtc);
308
309 crtc_state->connector_mask &=
310 ~drm_connector_mask(conn_state->connector);
311
312 drm_connector_put(conn_state->connector);
313 conn_state->crtc = NULL;
314 }
315
316 if (crtc) {
317 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
318 if (IS_ERR(crtc_state))
319 return PTR_ERR(crtc_state);
320
321 crtc_state->connector_mask |=
322 drm_connector_mask(conn_state->connector);
323
324 drm_connector_get(conn_state->connector);
325 conn_state->crtc = crtc;
326
327 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n",
328 connector->base.id, connector->name,
329 conn_state, crtc->base.id, crtc->name);
330 } else {
331 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n",
332 connector->base.id, connector->name,
333 conn_state);
334 }
335
336 return 0;
337}
338EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
339
340static void set_out_fence_for_crtc(struct drm_atomic_state *state,
341 struct drm_crtc *crtc, s32 __user *fence_ptr)
342{
343 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
344}
345
346static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
347 struct drm_crtc *crtc)
348{
349 s32 __user *fence_ptr;
350
351 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
352 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
353
354 return fence_ptr;
355}
356
357static int set_out_fence_for_connector(struct drm_atomic_state *state,
358 struct drm_connector *connector,
359 s32 __user *fence_ptr)
360{
361 unsigned int index = drm_connector_index(connector);
362
363 if (!fence_ptr)
364 return 0;
365
366 if (put_user(-1, fence_ptr))
367 return -EFAULT;
368
369 state->connectors[index].out_fence_ptr = fence_ptr;
370
371 return 0;
372}
373
374static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state,
375 struct drm_connector *connector)
376{
377 unsigned int index = drm_connector_index(connector);
378 s32 __user *fence_ptr;
379
380 fence_ptr = state->connectors[index].out_fence_ptr;
381 state->connectors[index].out_fence_ptr = NULL;
382
383 return fence_ptr;
384}
385
386static int
387drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
388 struct drm_property_blob **blob,
389 uint64_t blob_id,
390 ssize_t expected_size,
391 ssize_t expected_elem_size,
392 bool *replaced)
393{
394 struct drm_property_blob *new_blob = NULL;
395
396 if (blob_id != 0) {
397 new_blob = drm_property_lookup_blob(dev, blob_id);
398 if (new_blob == NULL)
399 return -EINVAL;
400
401 if (expected_size > 0 &&
402 new_blob->length != expected_size) {
403 drm_property_blob_put(new_blob);
404 return -EINVAL;
405 }
406 if (expected_elem_size > 0 &&
407 new_blob->length % expected_elem_size != 0) {
408 drm_property_blob_put(new_blob);
409 return -EINVAL;
410 }
411 }
412
413 *replaced |= drm_property_replace_blob(blob, new_blob);
414 drm_property_blob_put(new_blob);
415
416 return 0;
417}
418
419static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
420 struct drm_crtc_state *state, struct drm_property *property,
421 uint64_t val)
422{
423 struct drm_device *dev = crtc->dev;
424 struct drm_mode_config *config = &dev->mode_config;
425 bool replaced = false;
426 int ret;
427
428 if (property == config->prop_active)
429 state->active = val;
430 else if (property == config->prop_mode_id) {
431 struct drm_property_blob *mode =
432 drm_property_lookup_blob(dev, val);
433 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
434 drm_property_blob_put(mode);
435 return ret;
436 } else if (property == config->prop_vrr_enabled) {
437 state->vrr_enabled = val;
438 } else if (property == config->degamma_lut_property) {
439 ret = drm_atomic_replace_property_blob_from_id(dev,
440 &state->degamma_lut,
441 val,
442 -1, sizeof(struct drm_color_lut),
443 &replaced);
444 state->color_mgmt_changed |= replaced;
445 return ret;
446 } else if (property == config->ctm_property) {
447 ret = drm_atomic_replace_property_blob_from_id(dev,
448 &state->ctm,
449 val,
450 sizeof(struct drm_color_ctm), -1,
451 &replaced);
452 state->color_mgmt_changed |= replaced;
453 return ret;
454 } else if (property == config->gamma_lut_property) {
455 ret = drm_atomic_replace_property_blob_from_id(dev,
456 &state->gamma_lut,
457 val,
458 -1, sizeof(struct drm_color_lut),
459 &replaced);
460 state->color_mgmt_changed |= replaced;
461 return ret;
462 } else if (property == config->prop_out_fence_ptr) {
463 s32 __user *fence_ptr = u64_to_user_ptr(val);
464
465 if (!fence_ptr)
466 return 0;
467
468 if (put_user(-1, fence_ptr))
469 return -EFAULT;
470
471 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
472 } else if (crtc->funcs->atomic_set_property) {
473 return crtc->funcs->atomic_set_property(crtc, state, property, val);
474 } else {
475 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
476 crtc->base.id, crtc->name,
477 property->base.id, property->name);
478 return -EINVAL;
479 }
480
481 return 0;
482}
483
484static int
485drm_atomic_crtc_get_property(struct drm_crtc *crtc,
486 const struct drm_crtc_state *state,
487 struct drm_property *property, uint64_t *val)
488{
489 struct drm_device *dev = crtc->dev;
490 struct drm_mode_config *config = &dev->mode_config;
491
492 if (property == config->prop_active)
493 *val = drm_atomic_crtc_effectively_active(state);
494 else if (property == config->prop_mode_id)
495 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
496 else if (property == config->prop_vrr_enabled)
497 *val = state->vrr_enabled;
498 else if (property == config->degamma_lut_property)
499 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
500 else if (property == config->ctm_property)
501 *val = (state->ctm) ? state->ctm->base.id : 0;
502 else if (property == config->gamma_lut_property)
503 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
504 else if (property == config->prop_out_fence_ptr)
505 *val = 0;
506 else if (crtc->funcs->atomic_get_property)
507 return crtc->funcs->atomic_get_property(crtc, state, property, val);
508 else
509 return -EINVAL;
510
511 return 0;
512}
513
514static int drm_atomic_plane_set_property(struct drm_plane *plane,
515 struct drm_plane_state *state, struct drm_file *file_priv,
516 struct drm_property *property, uint64_t val)
517{
518 struct drm_device *dev = plane->dev;
519 struct drm_mode_config *config = &dev->mode_config;
520 bool replaced = false;
521 int ret;
522
523 if (property == config->prop_fb_id) {
524 struct drm_framebuffer *fb;
525 fb = drm_framebuffer_lookup(dev, file_priv, val);
526 drm_atomic_set_fb_for_plane(state, fb);
527 if (fb)
528 drm_framebuffer_put(fb);
529 } else if (property == config->prop_in_fence_fd) {
530 if (state->fence)
531 return -EINVAL;
532
533 if (U642I64(val) == -1)
534 return 0;
535
536 state->fence = sync_file_get_fence(val);
537 if (!state->fence)
538 return -EINVAL;
539
540 } else if (property == config->prop_crtc_id) {
541 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
542 if (val && !crtc)
543 return -EACCES;
544 return drm_atomic_set_crtc_for_plane(state, crtc);
545 } else if (property == config->prop_crtc_x) {
546 state->crtc_x = U642I64(val);
547 } else if (property == config->prop_crtc_y) {
548 state->crtc_y = U642I64(val);
549 } else if (property == config->prop_crtc_w) {
550 state->crtc_w = val;
551 } else if (property == config->prop_crtc_h) {
552 state->crtc_h = val;
553 } else if (property == config->prop_src_x) {
554 state->src_x = val;
555 } else if (property == config->prop_src_y) {
556 state->src_y = val;
557 } else if (property == config->prop_src_w) {
558 state->src_w = val;
559 } else if (property == config->prop_src_h) {
560 state->src_h = val;
561 } else if (property == plane->alpha_property) {
562 state->alpha = val;
563 } else if (property == plane->blend_mode_property) {
564 state->pixel_blend_mode = val;
565 } else if (property == plane->rotation_property) {
566 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {
567 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",
568 plane->base.id, plane->name, val);
569 return -EINVAL;
570 }
571 state->rotation = val;
572 } else if (property == plane->zpos_property) {
573 state->zpos = val;
574 } else if (property == plane->color_encoding_property) {
575 state->color_encoding = val;
576 } else if (property == plane->color_range_property) {
577 state->color_range = val;
578 } else if (property == config->prop_fb_damage_clips) {
579 ret = drm_atomic_replace_property_blob_from_id(dev,
580 &state->fb_damage_clips,
581 val,
582 -1,
583 sizeof(struct drm_rect),
584 &replaced);
585 return ret;
586 } else if (plane->funcs->atomic_set_property) {
587 return plane->funcs->atomic_set_property(plane, state,
588 property, val);
589 } else {
590 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n",
591 plane->base.id, plane->name,
592 property->base.id, property->name);
593 return -EINVAL;
594 }
595
596 return 0;
597}
598
599static int
600drm_atomic_plane_get_property(struct drm_plane *plane,
601 const struct drm_plane_state *state,
602 struct drm_property *property, uint64_t *val)
603{
604 struct drm_device *dev = plane->dev;
605 struct drm_mode_config *config = &dev->mode_config;
606
607 if (property == config->prop_fb_id) {
608 *val = (state->fb) ? state->fb->base.id : 0;
609 } else if (property == config->prop_in_fence_fd) {
610 *val = -1;
611 } else if (property == config->prop_crtc_id) {
612 *val = (state->crtc) ? state->crtc->base.id : 0;
613 } else if (property == config->prop_crtc_x) {
614 *val = I642U64(state->crtc_x);
615 } else if (property == config->prop_crtc_y) {
616 *val = I642U64(state->crtc_y);
617 } else if (property == config->prop_crtc_w) {
618 *val = state->crtc_w;
619 } else if (property == config->prop_crtc_h) {
620 *val = state->crtc_h;
621 } else if (property == config->prop_src_x) {
622 *val = state->src_x;
623 } else if (property == config->prop_src_y) {
624 *val = state->src_y;
625 } else if (property == config->prop_src_w) {
626 *val = state->src_w;
627 } else if (property == config->prop_src_h) {
628 *val = state->src_h;
629 } else if (property == plane->alpha_property) {
630 *val = state->alpha;
631 } else if (property == plane->blend_mode_property) {
632 *val = state->pixel_blend_mode;
633 } else if (property == plane->rotation_property) {
634 *val = state->rotation;
635 } else if (property == plane->zpos_property) {
636 *val = state->zpos;
637 } else if (property == plane->color_encoding_property) {
638 *val = state->color_encoding;
639 } else if (property == plane->color_range_property) {
640 *val = state->color_range;
641 } else if (property == config->prop_fb_damage_clips) {
642 *val = (state->fb_damage_clips) ?
643 state->fb_damage_clips->base.id : 0;
644 } else if (plane->funcs->atomic_get_property) {
645 return plane->funcs->atomic_get_property(plane, state, property, val);
646 } else {
647 return -EINVAL;
648 }
649
650 return 0;
651}
652
653static int drm_atomic_set_writeback_fb_for_connector(
654 struct drm_connector_state *conn_state,
655 struct drm_framebuffer *fb)
656{
657 int ret;
658
659 ret = drm_writeback_set_fb(conn_state, fb);
660 if (ret < 0)
661 return ret;
662
663 if (fb)
664 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n",
665 fb->base.id, conn_state);
666 else
667 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n",
668 conn_state);
669
670 return 0;
671}
672
673static int drm_atomic_connector_set_property(struct drm_connector *connector,
674 struct drm_connector_state *state, struct drm_file *file_priv,
675 struct drm_property *property, uint64_t val)
676{
677 struct drm_device *dev = connector->dev;
678 struct drm_mode_config *config = &dev->mode_config;
679 bool replaced = false;
680 int ret;
681
682 if (property == config->prop_crtc_id) {
683 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
684 if (val && !crtc)
685 return -EACCES;
686 return drm_atomic_set_crtc_for_connector(state, crtc);
687 } else if (property == config->dpms_property) {
688 /* setting DPMS property requires special handling, which
689 * is done in legacy setprop path for us. Disallow (for
690 * now?) atomic writes to DPMS property:
691 */
692 return -EINVAL;
693 } else if (property == config->tv_select_subconnector_property) {
694 state->tv.subconnector = val;
695 } else if (property == config->tv_left_margin_property) {
696 state->tv.margins.left = val;
697 } else if (property == config->tv_right_margin_property) {
698 state->tv.margins.right = val;
699 } else if (property == config->tv_top_margin_property) {
700 state->tv.margins.top = val;
701 } else if (property == config->tv_bottom_margin_property) {
702 state->tv.margins.bottom = val;
703 } else if (property == config->tv_mode_property) {
704 state->tv.mode = val;
705 } else if (property == config->tv_brightness_property) {
706 state->tv.brightness = val;
707 } else if (property == config->tv_contrast_property) {
708 state->tv.contrast = val;
709 } else if (property == config->tv_flicker_reduction_property) {
710 state->tv.flicker_reduction = val;
711 } else if (property == config->tv_overscan_property) {
712 state->tv.overscan = val;
713 } else if (property == config->tv_saturation_property) {
714 state->tv.saturation = val;
715 } else if (property == config->tv_hue_property) {
716 state->tv.hue = val;
717 } else if (property == config->link_status_property) {
718 /* Never downgrade from GOOD to BAD on userspace's request here,
719 * only hw issues can do that.
720 *
721 * For an atomic property the userspace doesn't need to be able
722 * to understand all the properties, but needs to be able to
723 * restore the state it wants on VT switch. So if the userspace
724 * tries to change the link_status from GOOD to BAD, driver
725 * silently rejects it and returns a 0. This prevents userspace
726 * from accidently breaking the display when it restores the
727 * state.
728 */
729 if (state->link_status != DRM_LINK_STATUS_GOOD)
730 state->link_status = val;
731 } else if (property == config->hdr_output_metadata_property) {
732 ret = drm_atomic_replace_property_blob_from_id(dev,
733 &state->hdr_output_metadata,
734 val,
735 sizeof(struct hdr_output_metadata), -1,
736 &replaced);
737 return ret;
738 } else if (property == config->aspect_ratio_property) {
739 state->picture_aspect_ratio = val;
740 } else if (property == config->content_type_property) {
741 state->content_type = val;
742 } else if (property == connector->scaling_mode_property) {
743 state->scaling_mode = val;
744 } else if (property == config->content_protection_property) {
745 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
746 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
747 return -EINVAL;
748 }
749 state->content_protection = val;
750 } else if (property == config->hdcp_content_type_property) {
751 state->hdcp_content_type = val;
752 } else if (property == connector->colorspace_property) {
753 state->colorspace = val;
754 } else if (property == config->writeback_fb_id_property) {
755 struct drm_framebuffer *fb;
756 int ret;
757 fb = drm_framebuffer_lookup(dev, file_priv, val);
758 ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
759 if (fb)
760 drm_framebuffer_put(fb);
761 return ret;
762 } else if (property == config->writeback_out_fence_ptr_property) {
763 s32 __user *fence_ptr = u64_to_user_ptr(val);
764
765 return set_out_fence_for_connector(state->state, connector,
766 fence_ptr);
767 } else if (property == connector->max_bpc_property) {
768 state->max_requested_bpc = val;
769 } else if (connector->funcs->atomic_set_property) {
770 return connector->funcs->atomic_set_property(connector,
771 state, property, val);
772 } else {
773 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n",
774 connector->base.id, connector->name,
775 property->base.id, property->name);
776 return -EINVAL;
777 }
778
779 return 0;
780}
781
782static int
783drm_atomic_connector_get_property(struct drm_connector *connector,
784 const struct drm_connector_state *state,
785 struct drm_property *property, uint64_t *val)
786{
787 struct drm_device *dev = connector->dev;
788 struct drm_mode_config *config = &dev->mode_config;
789
790 if (property == config->prop_crtc_id) {
791 *val = (state->crtc) ? state->crtc->base.id : 0;
792 } else if (property == config->dpms_property) {
793 if (state->crtc && state->crtc->state->self_refresh_active)
794 *val = DRM_MODE_DPMS_ON;
795 else
796 *val = connector->dpms;
797 } else if (property == config->tv_select_subconnector_property) {
798 *val = state->tv.subconnector;
799 } else if (property == config->tv_left_margin_property) {
800 *val = state->tv.margins.left;
801 } else if (property == config->tv_right_margin_property) {
802 *val = state->tv.margins.right;
803 } else if (property == config->tv_top_margin_property) {
804 *val = state->tv.margins.top;
805 } else if (property == config->tv_bottom_margin_property) {
806 *val = state->tv.margins.bottom;
807 } else if (property == config->tv_mode_property) {
808 *val = state->tv.mode;
809 } else if (property == config->tv_brightness_property) {
810 *val = state->tv.brightness;
811 } else if (property == config->tv_contrast_property) {
812 *val = state->tv.contrast;
813 } else if (property == config->tv_flicker_reduction_property) {
814 *val = state->tv.flicker_reduction;
815 } else if (property == config->tv_overscan_property) {
816 *val = state->tv.overscan;
817 } else if (property == config->tv_saturation_property) {
818 *val = state->tv.saturation;
819 } else if (property == config->tv_hue_property) {
820 *val = state->tv.hue;
821 } else if (property == config->link_status_property) {
822 *val = state->link_status;
823 } else if (property == config->aspect_ratio_property) {
824 *val = state->picture_aspect_ratio;
825 } else if (property == config->content_type_property) {
826 *val = state->content_type;
827 } else if (property == connector->colorspace_property) {
828 *val = state->colorspace;
829 } else if (property == connector->scaling_mode_property) {
830 *val = state->scaling_mode;
831 } else if (property == config->hdr_output_metadata_property) {
832 *val = state->hdr_output_metadata ?
833 state->hdr_output_metadata->base.id : 0;
834 } else if (property == config->content_protection_property) {
835 *val = state->content_protection;
836 } else if (property == config->hdcp_content_type_property) {
837 *val = state->hdcp_content_type;
838 } else if (property == config->writeback_fb_id_property) {
839 /* Writeback framebuffer is one-shot, write and forget */
840 *val = 0;
841 } else if (property == config->writeback_out_fence_ptr_property) {
842 *val = 0;
843 } else if (property == connector->max_bpc_property) {
844 *val = state->max_requested_bpc;
845 } else if (connector->funcs->atomic_get_property) {
846 return connector->funcs->atomic_get_property(connector,
847 state, property, val);
848 } else {
849 return -EINVAL;
850 }
851
852 return 0;
853}
854
855int drm_atomic_get_property(struct drm_mode_object *obj,
856 struct drm_property *property, uint64_t *val)
857{
858 struct drm_device *dev = property->dev;
859 int ret;
860
861 switch (obj->type) {
862 case DRM_MODE_OBJECT_CONNECTOR: {
863 struct drm_connector *connector = obj_to_connector(obj);
864 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
865 ret = drm_atomic_connector_get_property(connector,
866 connector->state, property, val);
867 break;
868 }
869 case DRM_MODE_OBJECT_CRTC: {
870 struct drm_crtc *crtc = obj_to_crtc(obj);
871 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
872 ret = drm_atomic_crtc_get_property(crtc,
873 crtc->state, property, val);
874 break;
875 }
876 case DRM_MODE_OBJECT_PLANE: {
877 struct drm_plane *plane = obj_to_plane(obj);
878 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
879 ret = drm_atomic_plane_get_property(plane,
880 plane->state, property, val);
881 break;
882 }
883 default:
884 ret = -EINVAL;
885 break;
886 }
887
888 return ret;
889}
890
891/*
892 * The big monster ioctl
893 */
894
895static struct drm_pending_vblank_event *create_vblank_event(
896 struct drm_crtc *crtc, uint64_t user_data)
897{
898 struct drm_pending_vblank_event *e = NULL;
899
900 e = kzalloc(sizeof *e, GFP_KERNEL);
901 if (!e)
902 return NULL;
903
904 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
905 e->event.base.length = sizeof(e->event);
906 e->event.vbl.crtc_id = crtc->base.id;
907 e->event.vbl.user_data = user_data;
908
909 return e;
910}
911
912int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
913 struct drm_connector *connector,
914 int mode)
915{
916 struct drm_connector *tmp_connector;
917 struct drm_connector_state *new_conn_state;
918 struct drm_crtc *crtc;
919 struct drm_crtc_state *crtc_state;
920 int i, ret, old_mode = connector->dpms;
921 bool active = false;
922
923 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
924 state->acquire_ctx);
925 if (ret)
926 return ret;
927
928 if (mode != DRM_MODE_DPMS_ON)
929 mode = DRM_MODE_DPMS_OFF;
930 connector->dpms = mode;
931
932 crtc = connector->state->crtc;
933 if (!crtc)
934 goto out;
935 ret = drm_atomic_add_affected_connectors(state, crtc);
936 if (ret)
937 goto out;
938
939 crtc_state = drm_atomic_get_crtc_state(state, crtc);
940 if (IS_ERR(crtc_state)) {
941 ret = PTR_ERR(crtc_state);
942 goto out;
943 }
944
945 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
946 if (new_conn_state->crtc != crtc)
947 continue;
948 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
949 active = true;
950 break;
951 }
952 }
953
954 crtc_state->active = active;
955 ret = drm_atomic_commit(state);
956out:
957 if (ret != 0)
958 connector->dpms = old_mode;
959 return ret;
960}
961
962int drm_atomic_set_property(struct drm_atomic_state *state,
963 struct drm_file *file_priv,
964 struct drm_mode_object *obj,
965 struct drm_property *prop,
966 uint64_t prop_value)
967{
968 struct drm_mode_object *ref;
969 int ret;
970
971 if (!drm_property_change_valid_get(prop, prop_value, &ref))
972 return -EINVAL;
973
974 switch (obj->type) {
975 case DRM_MODE_OBJECT_CONNECTOR: {
976 struct drm_connector *connector = obj_to_connector(obj);
977 struct drm_connector_state *connector_state;
978
979 connector_state = drm_atomic_get_connector_state(state, connector);
980 if (IS_ERR(connector_state)) {
981 ret = PTR_ERR(connector_state);
982 break;
983 }
984
985 ret = drm_atomic_connector_set_property(connector,
986 connector_state, file_priv,
987 prop, prop_value);
988 break;
989 }
990 case DRM_MODE_OBJECT_CRTC: {
991 struct drm_crtc *crtc = obj_to_crtc(obj);
992 struct drm_crtc_state *crtc_state;
993
994 crtc_state = drm_atomic_get_crtc_state(state, crtc);
995 if (IS_ERR(crtc_state)) {
996 ret = PTR_ERR(crtc_state);
997 break;
998 }
999
1000 ret = drm_atomic_crtc_set_property(crtc,
1001 crtc_state, prop, prop_value);
1002 break;
1003 }
1004 case DRM_MODE_OBJECT_PLANE: {
1005 struct drm_plane *plane = obj_to_plane(obj);
1006 struct drm_plane_state *plane_state;
1007
1008 plane_state = drm_atomic_get_plane_state(state, plane);
1009 if (IS_ERR(plane_state)) {
1010 ret = PTR_ERR(plane_state);
1011 break;
1012 }
1013
1014 ret = drm_atomic_plane_set_property(plane,
1015 plane_state, file_priv,
1016 prop, prop_value);
1017 break;
1018 }
1019 default:
1020 ret = -EINVAL;
1021 break;
1022 }
1023
1024 drm_property_change_valid_put(prop, ref);
1025 return ret;
1026}
1027
1028/**
1029 * DOC: explicit fencing properties
1030 *
1031 * Explicit fencing allows userspace to control the buffer synchronization
1032 * between devices. A Fence or a group of fences are transfered to/from
1033 * userspace using Sync File fds and there are two DRM properties for that.
1034 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
1035 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
1036 *
1037 * As a contrast, with implicit fencing the kernel keeps track of any
1038 * ongoing rendering, and automatically ensures that the atomic update waits
1039 * for any pending rendering to complete. For shared buffers represented with
1040 * a &struct dma_buf this is tracked in &struct dma_resv.
1041 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
1042 * whereas explicit fencing is what Android wants.
1043 *
1044 * "IN_FENCE_FD”:
1045 * Use this property to pass a fence that DRM should wait on before
1046 * proceeding with the Atomic Commit request and show the framebuffer for
1047 * the plane on the screen. The fence can be either a normal fence or a
1048 * merged one, the sync_file framework will handle both cases and use a
1049 * fence_array if a merged fence is received. Passing -1 here means no
1050 * fences to wait on.
1051 *
1052 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
1053 * it will only check if the Sync File is a valid one.
1054 *
1055 * On the driver side the fence is stored on the @fence parameter of
1056 * &struct drm_plane_state. Drivers which also support implicit fencing
1057 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
1058 * to make sure there's consistent behaviour between drivers in precedence
1059 * of implicit vs. explicit fencing.
1060 *
1061 * "OUT_FENCE_PTR”:
1062 * Use this property to pass a file descriptor pointer to DRM. Once the
1063 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
1064 * the file descriptor number of a Sync File. This Sync File contains the
1065 * CRTC fence that will be signaled when all framebuffers present on the
1066 * Atomic Commit * request for that given CRTC are scanned out on the
1067 * screen.
1068 *
1069 * The Atomic Commit request fails if a invalid pointer is passed. If the
1070 * Atomic Commit request fails for any other reason the out fence fd
1071 * returned will be -1. On a Atomic Commit with the
1072 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
1073 *
1074 * Note that out-fences don't have a special interface to drivers and are
1075 * internally represented by a &struct drm_pending_vblank_event in struct
1076 * &drm_crtc_state, which is also used by the nonblocking atomic commit
1077 * helpers and for the DRM event handling for existing userspace.
1078 */
1079
1080struct drm_out_fence_state {
1081 s32 __user *out_fence_ptr;
1082 struct sync_file *sync_file;
1083 int fd;
1084};
1085
1086static int setup_out_fence(struct drm_out_fence_state *fence_state,
1087 struct dma_fence *fence)
1088{
1089 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
1090 if (fence_state->fd < 0)
1091 return fence_state->fd;
1092
1093 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
1094 return -EFAULT;
1095
1096 fence_state->sync_file = sync_file_create(fence);
1097 if (!fence_state->sync_file)
1098 return -ENOMEM;
1099
1100 return 0;
1101}
1102
1103static int prepare_signaling(struct drm_device *dev,
1104 struct drm_atomic_state *state,
1105 struct drm_mode_atomic *arg,
1106 struct drm_file *file_priv,
1107 struct drm_out_fence_state **fence_state,
1108 unsigned int *num_fences)
1109{
1110 struct drm_crtc *crtc;
1111 struct drm_crtc_state *crtc_state;
1112 struct drm_connector *conn;
1113 struct drm_connector_state *conn_state;
1114 int i, c = 0, ret;
1115
1116 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
1117 return 0;
1118
1119 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1120 s32 __user *fence_ptr;
1121
1122 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
1123
1124 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
1125 struct drm_pending_vblank_event *e;
1126
1127 e = create_vblank_event(crtc, arg->user_data);
1128 if (!e)
1129 return -ENOMEM;
1130
1131 crtc_state->event = e;
1132 }
1133
1134 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1135 struct drm_pending_vblank_event *e = crtc_state->event;
1136
1137 if (!file_priv)
1138 continue;
1139
1140 ret = drm_event_reserve_init(dev, file_priv, &e->base,
1141 &e->event.base);
1142 if (ret) {
1143 kfree(e);
1144 crtc_state->event = NULL;
1145 return ret;
1146 }
1147 }
1148
1149 if (fence_ptr) {
1150 struct dma_fence *fence;
1151 struct drm_out_fence_state *f;
1152
1153 f = krealloc(*fence_state, sizeof(**fence_state) *
1154 (*num_fences + 1), GFP_KERNEL);
1155 if (!f)
1156 return -ENOMEM;
1157
1158 memset(&f[*num_fences], 0, sizeof(*f));
1159
1160 f[*num_fences].out_fence_ptr = fence_ptr;
1161 *fence_state = f;
1162
1163 fence = drm_crtc_create_fence(crtc);
1164 if (!fence)
1165 return -ENOMEM;
1166
1167 ret = setup_out_fence(&f[(*num_fences)++], fence);
1168 if (ret) {
1169 dma_fence_put(fence);
1170 return ret;
1171 }
1172
1173 crtc_state->event->base.fence = fence;
1174 }
1175
1176 c++;
1177 }
1178
1179 for_each_new_connector_in_state(state, conn, conn_state, i) {
1180 struct drm_writeback_connector *wb_conn;
1181 struct drm_out_fence_state *f;
1182 struct dma_fence *fence;
1183 s32 __user *fence_ptr;
1184
1185 if (!conn_state->writeback_job)
1186 continue;
1187
1188 fence_ptr = get_out_fence_for_connector(state, conn);
1189 if (!fence_ptr)
1190 continue;
1191
1192 f = krealloc(*fence_state, sizeof(**fence_state) *
1193 (*num_fences + 1), GFP_KERNEL);
1194 if (!f)
1195 return -ENOMEM;
1196
1197 memset(&f[*num_fences], 0, sizeof(*f));
1198
1199 f[*num_fences].out_fence_ptr = fence_ptr;
1200 *fence_state = f;
1201
1202 wb_conn = drm_connector_to_writeback(conn);
1203 fence = drm_writeback_get_out_fence(wb_conn);
1204 if (!fence)
1205 return -ENOMEM;
1206
1207 ret = setup_out_fence(&f[(*num_fences)++], fence);
1208 if (ret) {
1209 dma_fence_put(fence);
1210 return ret;
1211 }
1212
1213 conn_state->writeback_job->out_fence = fence;
1214 }
1215
1216 /*
1217 * Having this flag means user mode pends on event which will never
1218 * reach due to lack of at least one CRTC for signaling
1219 */
1220 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1221 return -EINVAL;
1222
1223 return 0;
1224}
1225
1226static void complete_signaling(struct drm_device *dev,
1227 struct drm_atomic_state *state,
1228 struct drm_out_fence_state *fence_state,
1229 unsigned int num_fences,
1230 bool install_fds)
1231{
1232 struct drm_crtc *crtc;
1233 struct drm_crtc_state *crtc_state;
1234 int i;
1235
1236 if (install_fds) {
1237 for (i = 0; i < num_fences; i++)
1238 fd_install(fence_state[i].fd,
1239 fence_state[i].sync_file->file);
1240
1241 kfree(fence_state);
1242 return;
1243 }
1244
1245 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1246 struct drm_pending_vblank_event *event = crtc_state->event;
1247 /*
1248 * Free the allocated event. drm_atomic_helper_setup_commit
1249 * can allocate an event too, so only free it if it's ours
1250 * to prevent a double free in drm_atomic_state_clear.
1251 */
1252 if (event && (event->base.fence || event->base.file_priv)) {
1253 drm_event_cancel_free(dev, &event->base);
1254 crtc_state->event = NULL;
1255 }
1256 }
1257
1258 if (!fence_state)
1259 return;
1260
1261 for (i = 0; i < num_fences; i++) {
1262 if (fence_state[i].sync_file)
1263 fput(fence_state[i].sync_file->file);
1264 if (fence_state[i].fd >= 0)
1265 put_unused_fd(fence_state[i].fd);
1266
1267 /* If this fails log error to the user */
1268 if (fence_state[i].out_fence_ptr &&
1269 put_user(-1, fence_state[i].out_fence_ptr))
1270 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
1271 }
1272
1273 kfree(fence_state);
1274}
1275
1276int drm_mode_atomic_ioctl(struct drm_device *dev,
1277 void *data, struct drm_file *file_priv)
1278{
1279 struct drm_mode_atomic *arg = data;
1280 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1281 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1282 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1283 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1284 unsigned int copied_objs, copied_props;
1285 struct drm_atomic_state *state;
1286 struct drm_modeset_acquire_ctx ctx;
1287 struct drm_out_fence_state *fence_state;
1288 int ret = 0;
1289 unsigned int i, j, num_fences;
1290
1291 /* disallow for drivers not supporting atomic: */
1292 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1293 return -EOPNOTSUPP;
1294
1295 /* disallow for userspace that has not enabled atomic cap (even
1296 * though this may be a bit overkill, since legacy userspace
1297 * wouldn't know how to call this ioctl)
1298 */
1299 if (!file_priv->atomic)
1300 return -EINVAL;
1301
1302 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
1303 return -EINVAL;
1304
1305 if (arg->reserved)
1306 return -EINVAL;
1307
1308 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC)
1309 return -EINVAL;
1310
1311 /* can't test and expect an event at the same time. */
1312 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1313 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1314 return -EINVAL;
1315
1316 state = drm_atomic_state_alloc(dev);
1317 if (!state)
1318 return -ENOMEM;
1319
1320 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1321 state->acquire_ctx = &ctx;
1322 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1323
1324retry:
1325 copied_objs = 0;
1326 copied_props = 0;
1327 fence_state = NULL;
1328 num_fences = 0;
1329
1330 for (i = 0; i < arg->count_objs; i++) {
1331 uint32_t obj_id, count_props;
1332 struct drm_mode_object *obj;
1333
1334 if (get_user(obj_id, objs_ptr + copied_objs)) {
1335 ret = -EFAULT;
1336 goto out;
1337 }
1338
1339 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
1340 if (!obj) {
1341 ret = -ENOENT;
1342 goto out;
1343 }
1344
1345 if (!obj->properties) {
1346 drm_mode_object_put(obj);
1347 ret = -ENOENT;
1348 goto out;
1349 }
1350
1351 if (get_user(count_props, count_props_ptr + copied_objs)) {
1352 drm_mode_object_put(obj);
1353 ret = -EFAULT;
1354 goto out;
1355 }
1356
1357 copied_objs++;
1358
1359 for (j = 0; j < count_props; j++) {
1360 uint32_t prop_id;
1361 uint64_t prop_value;
1362 struct drm_property *prop;
1363
1364 if (get_user(prop_id, props_ptr + copied_props)) {
1365 drm_mode_object_put(obj);
1366 ret = -EFAULT;
1367 goto out;
1368 }
1369
1370 prop = drm_mode_obj_find_prop_id(obj, prop_id);
1371 if (!prop) {
1372 drm_mode_object_put(obj);
1373 ret = -ENOENT;
1374 goto out;
1375 }
1376
1377 if (copy_from_user(&prop_value,
1378 prop_values_ptr + copied_props,
1379 sizeof(prop_value))) {
1380 drm_mode_object_put(obj);
1381 ret = -EFAULT;
1382 goto out;
1383 }
1384
1385 ret = drm_atomic_set_property(state, file_priv,
1386 obj, prop, prop_value);
1387 if (ret) {
1388 drm_mode_object_put(obj);
1389 goto out;
1390 }
1391
1392 copied_props++;
1393 }
1394
1395 drm_mode_object_put(obj);
1396 }
1397
1398 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state,
1399 &num_fences);
1400 if (ret)
1401 goto out;
1402
1403 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1404 ret = drm_atomic_check_only(state);
1405 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1406 ret = drm_atomic_nonblocking_commit(state);
1407 } else {
1408 if (unlikely(drm_debug & DRM_UT_STATE))
1409 drm_atomic_print_state(state);
1410
1411 ret = drm_atomic_commit(state);
1412 }
1413
1414out:
1415 complete_signaling(dev, state, fence_state, num_fences, !ret);
1416
1417 if (ret == -EDEADLK) {
1418 drm_atomic_state_clear(state);
1419 ret = drm_modeset_backoff(&ctx);
1420 if (!ret)
1421 goto retry;
1422 }
1423
1424 drm_atomic_state_put(state);
1425
1426 drm_modeset_drop_locks(&ctx);
1427 drm_modeset_acquire_fini(&ctx);
1428
1429 return ret;
1430}