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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
526 fb = drm_framebuffer_lookup(dev, file_priv, val);
527 drm_atomic_set_fb_for_plane(state, fb);
528 if (fb)
529 drm_framebuffer_put(fb);
530 } else if (property == config->prop_in_fence_fd) {
531 if (state->fence)
532 return -EINVAL;
533
534 if (U642I64(val) == -1)
535 return 0;
536
537 state->fence = sync_file_get_fence(val);
538 if (!state->fence)
539 return -EINVAL;
540
541 } else if (property == config->prop_crtc_id) {
542 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
543
544 if (val && !crtc)
545 return -EACCES;
546 return drm_atomic_set_crtc_for_plane(state, crtc);
547 } else if (property == config->prop_crtc_x) {
548 state->crtc_x = U642I64(val);
549 } else if (property == config->prop_crtc_y) {
550 state->crtc_y = U642I64(val);
551 } else if (property == config->prop_crtc_w) {
552 state->crtc_w = val;
553 } else if (property == config->prop_crtc_h) {
554 state->crtc_h = val;
555 } else if (property == config->prop_src_x) {
556 state->src_x = val;
557 } else if (property == config->prop_src_y) {
558 state->src_y = val;
559 } else if (property == config->prop_src_w) {
560 state->src_w = val;
561 } else if (property == config->prop_src_h) {
562 state->src_h = val;
563 } else if (property == plane->alpha_property) {
564 state->alpha = val;
565 } else if (property == plane->blend_mode_property) {
566 state->pixel_blend_mode = val;
567 } else if (property == plane->rotation_property) {
568 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {
569 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",
570 plane->base.id, plane->name, val);
571 return -EINVAL;
572 }
573 state->rotation = val;
574 } else if (property == plane->zpos_property) {
575 state->zpos = val;
576 } else if (property == plane->color_encoding_property) {
577 state->color_encoding = val;
578 } else if (property == plane->color_range_property) {
579 state->color_range = val;
580 } else if (property == config->prop_fb_damage_clips) {
581 ret = drm_atomic_replace_property_blob_from_id(dev,
582 &state->fb_damage_clips,
583 val,
584 -1,
585 sizeof(struct drm_rect),
586 &replaced);
587 return ret;
588 } else if (plane->funcs->atomic_set_property) {
589 return plane->funcs->atomic_set_property(plane, state,
590 property, val);
591 } else {
592 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n",
593 plane->base.id, plane->name,
594 property->base.id, property->name);
595 return -EINVAL;
596 }
597
598 return 0;
599}
600
601static int
602drm_atomic_plane_get_property(struct drm_plane *plane,
603 const struct drm_plane_state *state,
604 struct drm_property *property, uint64_t *val)
605{
606 struct drm_device *dev = plane->dev;
607 struct drm_mode_config *config = &dev->mode_config;
608
609 if (property == config->prop_fb_id) {
610 *val = (state->fb) ? state->fb->base.id : 0;
611 } else if (property == config->prop_in_fence_fd) {
612 *val = -1;
613 } else if (property == config->prop_crtc_id) {
614 *val = (state->crtc) ? state->crtc->base.id : 0;
615 } else if (property == config->prop_crtc_x) {
616 *val = I642U64(state->crtc_x);
617 } else if (property == config->prop_crtc_y) {
618 *val = I642U64(state->crtc_y);
619 } else if (property == config->prop_crtc_w) {
620 *val = state->crtc_w;
621 } else if (property == config->prop_crtc_h) {
622 *val = state->crtc_h;
623 } else if (property == config->prop_src_x) {
624 *val = state->src_x;
625 } else if (property == config->prop_src_y) {
626 *val = state->src_y;
627 } else if (property == config->prop_src_w) {
628 *val = state->src_w;
629 } else if (property == config->prop_src_h) {
630 *val = state->src_h;
631 } else if (property == plane->alpha_property) {
632 *val = state->alpha;
633 } else if (property == plane->blend_mode_property) {
634 *val = state->pixel_blend_mode;
635 } else if (property == plane->rotation_property) {
636 *val = state->rotation;
637 } else if (property == plane->zpos_property) {
638 *val = state->zpos;
639 } else if (property == plane->color_encoding_property) {
640 *val = state->color_encoding;
641 } else if (property == plane->color_range_property) {
642 *val = state->color_range;
643 } else if (property == config->prop_fb_damage_clips) {
644 *val = (state->fb_damage_clips) ?
645 state->fb_damage_clips->base.id : 0;
646 } else if (plane->funcs->atomic_get_property) {
647 return plane->funcs->atomic_get_property(plane, state, property, val);
648 } else {
649 return -EINVAL;
650 }
651
652 return 0;
653}
654
655static int drm_atomic_set_writeback_fb_for_connector(
656 struct drm_connector_state *conn_state,
657 struct drm_framebuffer *fb)
658{
659 int ret;
660
661 ret = drm_writeback_set_fb(conn_state, fb);
662 if (ret < 0)
663 return ret;
664
665 if (fb)
666 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n",
667 fb->base.id, conn_state);
668 else
669 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n",
670 conn_state);
671
672 return 0;
673}
674
675static int drm_atomic_connector_set_property(struct drm_connector *connector,
676 struct drm_connector_state *state, struct drm_file *file_priv,
677 struct drm_property *property, uint64_t val)
678{
679 struct drm_device *dev = connector->dev;
680 struct drm_mode_config *config = &dev->mode_config;
681 bool replaced = false;
682 int ret;
683
684 if (property == config->prop_crtc_id) {
685 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
686
687 if (val && !crtc)
688 return -EACCES;
689 return drm_atomic_set_crtc_for_connector(state, crtc);
690 } else if (property == config->dpms_property) {
691 /* setting DPMS property requires special handling, which
692 * is done in legacy setprop path for us. Disallow (for
693 * now?) atomic writes to DPMS property:
694 */
695 return -EINVAL;
696 } else if (property == config->tv_select_subconnector_property) {
697 state->tv.subconnector = val;
698 } else if (property == config->tv_left_margin_property) {
699 state->tv.margins.left = val;
700 } else if (property == config->tv_right_margin_property) {
701 state->tv.margins.right = val;
702 } else if (property == config->tv_top_margin_property) {
703 state->tv.margins.top = val;
704 } else if (property == config->tv_bottom_margin_property) {
705 state->tv.margins.bottom = val;
706 } else if (property == config->tv_mode_property) {
707 state->tv.mode = val;
708 } else if (property == config->tv_brightness_property) {
709 state->tv.brightness = val;
710 } else if (property == config->tv_contrast_property) {
711 state->tv.contrast = val;
712 } else if (property == config->tv_flicker_reduction_property) {
713 state->tv.flicker_reduction = val;
714 } else if (property == config->tv_overscan_property) {
715 state->tv.overscan = val;
716 } else if (property == config->tv_saturation_property) {
717 state->tv.saturation = val;
718 } else if (property == config->tv_hue_property) {
719 state->tv.hue = val;
720 } else if (property == config->link_status_property) {
721 /* Never downgrade from GOOD to BAD on userspace's request here,
722 * only hw issues can do that.
723 *
724 * For an atomic property the userspace doesn't need to be able
725 * to understand all the properties, but needs to be able to
726 * restore the state it wants on VT switch. So if the userspace
727 * tries to change the link_status from GOOD to BAD, driver
728 * silently rejects it and returns a 0. This prevents userspace
729 * from accidently breaking the display when it restores the
730 * state.
731 */
732 if (state->link_status != DRM_LINK_STATUS_GOOD)
733 state->link_status = val;
734 } else if (property == config->hdr_output_metadata_property) {
735 ret = drm_atomic_replace_property_blob_from_id(dev,
736 &state->hdr_output_metadata,
737 val,
738 sizeof(struct hdr_output_metadata), -1,
739 &replaced);
740 return ret;
741 } else if (property == config->aspect_ratio_property) {
742 state->picture_aspect_ratio = val;
743 } else if (property == config->content_type_property) {
744 state->content_type = val;
745 } else if (property == connector->scaling_mode_property) {
746 state->scaling_mode = val;
747 } else if (property == config->content_protection_property) {
748 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
749 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
750 return -EINVAL;
751 }
752 state->content_protection = val;
753 } else if (property == config->hdcp_content_type_property) {
754 state->hdcp_content_type = val;
755 } else if (property == connector->colorspace_property) {
756 state->colorspace = val;
757 } else if (property == config->writeback_fb_id_property) {
758 struct drm_framebuffer *fb;
759 int ret;
760
761 fb = drm_framebuffer_lookup(dev, file_priv, val);
762 ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
763 if (fb)
764 drm_framebuffer_put(fb);
765 return ret;
766 } else if (property == config->writeback_out_fence_ptr_property) {
767 s32 __user *fence_ptr = u64_to_user_ptr(val);
768
769 return set_out_fence_for_connector(state->state, connector,
770 fence_ptr);
771 } else if (property == connector->max_bpc_property) {
772 state->max_requested_bpc = val;
773 } else if (connector->funcs->atomic_set_property) {
774 return connector->funcs->atomic_set_property(connector,
775 state, property, val);
776 } else {
777 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n",
778 connector->base.id, connector->name,
779 property->base.id, property->name);
780 return -EINVAL;
781 }
782
783 return 0;
784}
785
786static int
787drm_atomic_connector_get_property(struct drm_connector *connector,
788 const struct drm_connector_state *state,
789 struct drm_property *property, uint64_t *val)
790{
791 struct drm_device *dev = connector->dev;
792 struct drm_mode_config *config = &dev->mode_config;
793
794 if (property == config->prop_crtc_id) {
795 *val = (state->crtc) ? state->crtc->base.id : 0;
796 } else if (property == config->dpms_property) {
797 if (state->crtc && state->crtc->state->self_refresh_active)
798 *val = DRM_MODE_DPMS_ON;
799 else
800 *val = connector->dpms;
801 } else if (property == config->tv_select_subconnector_property) {
802 *val = state->tv.subconnector;
803 } else if (property == config->tv_left_margin_property) {
804 *val = state->tv.margins.left;
805 } else if (property == config->tv_right_margin_property) {
806 *val = state->tv.margins.right;
807 } else if (property == config->tv_top_margin_property) {
808 *val = state->tv.margins.top;
809 } else if (property == config->tv_bottom_margin_property) {
810 *val = state->tv.margins.bottom;
811 } else if (property == config->tv_mode_property) {
812 *val = state->tv.mode;
813 } else if (property == config->tv_brightness_property) {
814 *val = state->tv.brightness;
815 } else if (property == config->tv_contrast_property) {
816 *val = state->tv.contrast;
817 } else if (property == config->tv_flicker_reduction_property) {
818 *val = state->tv.flicker_reduction;
819 } else if (property == config->tv_overscan_property) {
820 *val = state->tv.overscan;
821 } else if (property == config->tv_saturation_property) {
822 *val = state->tv.saturation;
823 } else if (property == config->tv_hue_property) {
824 *val = state->tv.hue;
825 } else if (property == config->link_status_property) {
826 *val = state->link_status;
827 } else if (property == config->aspect_ratio_property) {
828 *val = state->picture_aspect_ratio;
829 } else if (property == config->content_type_property) {
830 *val = state->content_type;
831 } else if (property == connector->colorspace_property) {
832 *val = state->colorspace;
833 } else if (property == connector->scaling_mode_property) {
834 *val = state->scaling_mode;
835 } else if (property == config->hdr_output_metadata_property) {
836 *val = state->hdr_output_metadata ?
837 state->hdr_output_metadata->base.id : 0;
838 } else if (property == config->content_protection_property) {
839 *val = state->content_protection;
840 } else if (property == config->hdcp_content_type_property) {
841 *val = state->hdcp_content_type;
842 } else if (property == config->writeback_fb_id_property) {
843 /* Writeback framebuffer is one-shot, write and forget */
844 *val = 0;
845 } else if (property == config->writeback_out_fence_ptr_property) {
846 *val = 0;
847 } else if (property == connector->max_bpc_property) {
848 *val = state->max_requested_bpc;
849 } else if (connector->funcs->atomic_get_property) {
850 return connector->funcs->atomic_get_property(connector,
851 state, property, val);
852 } else {
853 return -EINVAL;
854 }
855
856 return 0;
857}
858
859int drm_atomic_get_property(struct drm_mode_object *obj,
860 struct drm_property *property, uint64_t *val)
861{
862 struct drm_device *dev = property->dev;
863 int ret;
864
865 switch (obj->type) {
866 case DRM_MODE_OBJECT_CONNECTOR: {
867 struct drm_connector *connector = obj_to_connector(obj);
868
869 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
870 ret = drm_atomic_connector_get_property(connector,
871 connector->state, property, val);
872 break;
873 }
874 case DRM_MODE_OBJECT_CRTC: {
875 struct drm_crtc *crtc = obj_to_crtc(obj);
876
877 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
878 ret = drm_atomic_crtc_get_property(crtc,
879 crtc->state, property, val);
880 break;
881 }
882 case DRM_MODE_OBJECT_PLANE: {
883 struct drm_plane *plane = obj_to_plane(obj);
884
885 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
886 ret = drm_atomic_plane_get_property(plane,
887 plane->state, property, val);
888 break;
889 }
890 default:
891 ret = -EINVAL;
892 break;
893 }
894
895 return ret;
896}
897
898/*
899 * The big monster ioctl
900 */
901
902static struct drm_pending_vblank_event *create_vblank_event(
903 struct drm_crtc *crtc, uint64_t user_data)
904{
905 struct drm_pending_vblank_event *e = NULL;
906
907 e = kzalloc(sizeof *e, GFP_KERNEL);
908 if (!e)
909 return NULL;
910
911 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
912 e->event.base.length = sizeof(e->event);
913 e->event.vbl.crtc_id = crtc->base.id;
914 e->event.vbl.user_data = user_data;
915
916 return e;
917}
918
919int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
920 struct drm_connector *connector,
921 int mode)
922{
923 struct drm_connector *tmp_connector;
924 struct drm_connector_state *new_conn_state;
925 struct drm_crtc *crtc;
926 struct drm_crtc_state *crtc_state;
927 int i, ret, old_mode = connector->dpms;
928 bool active = false;
929
930 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
931 state->acquire_ctx);
932 if (ret)
933 return ret;
934
935 if (mode != DRM_MODE_DPMS_ON)
936 mode = DRM_MODE_DPMS_OFF;
937 connector->dpms = mode;
938
939 crtc = connector->state->crtc;
940 if (!crtc)
941 goto out;
942 ret = drm_atomic_add_affected_connectors(state, crtc);
943 if (ret)
944 goto out;
945
946 crtc_state = drm_atomic_get_crtc_state(state, crtc);
947 if (IS_ERR(crtc_state)) {
948 ret = PTR_ERR(crtc_state);
949 goto out;
950 }
951
952 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
953 if (new_conn_state->crtc != crtc)
954 continue;
955 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
956 active = true;
957 break;
958 }
959 }
960
961 crtc_state->active = active;
962 ret = drm_atomic_commit(state);
963out:
964 if (ret != 0)
965 connector->dpms = old_mode;
966 return ret;
967}
968
969int drm_atomic_set_property(struct drm_atomic_state *state,
970 struct drm_file *file_priv,
971 struct drm_mode_object *obj,
972 struct drm_property *prop,
973 uint64_t prop_value)
974{
975 struct drm_mode_object *ref;
976 int ret;
977
978 if (!drm_property_change_valid_get(prop, prop_value, &ref))
979 return -EINVAL;
980
981 switch (obj->type) {
982 case DRM_MODE_OBJECT_CONNECTOR: {
983 struct drm_connector *connector = obj_to_connector(obj);
984 struct drm_connector_state *connector_state;
985
986 connector_state = drm_atomic_get_connector_state(state, connector);
987 if (IS_ERR(connector_state)) {
988 ret = PTR_ERR(connector_state);
989 break;
990 }
991
992 ret = drm_atomic_connector_set_property(connector,
993 connector_state, file_priv,
994 prop, prop_value);
995 break;
996 }
997 case DRM_MODE_OBJECT_CRTC: {
998 struct drm_crtc *crtc = obj_to_crtc(obj);
999 struct drm_crtc_state *crtc_state;
1000
1001 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1002 if (IS_ERR(crtc_state)) {
1003 ret = PTR_ERR(crtc_state);
1004 break;
1005 }
1006
1007 ret = drm_atomic_crtc_set_property(crtc,
1008 crtc_state, prop, prop_value);
1009 break;
1010 }
1011 case DRM_MODE_OBJECT_PLANE: {
1012 struct drm_plane *plane = obj_to_plane(obj);
1013 struct drm_plane_state *plane_state;
1014
1015 plane_state = drm_atomic_get_plane_state(state, plane);
1016 if (IS_ERR(plane_state)) {
1017 ret = PTR_ERR(plane_state);
1018 break;
1019 }
1020
1021 ret = drm_atomic_plane_set_property(plane,
1022 plane_state, file_priv,
1023 prop, prop_value);
1024 break;
1025 }
1026 default:
1027 ret = -EINVAL;
1028 break;
1029 }
1030
1031 drm_property_change_valid_put(prop, ref);
1032 return ret;
1033}
1034
1035/**
1036 * DOC: explicit fencing properties
1037 *
1038 * Explicit fencing allows userspace to control the buffer synchronization
1039 * between devices. A Fence or a group of fences are transfered to/from
1040 * userspace using Sync File fds and there are two DRM properties for that.
1041 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
1042 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
1043 *
1044 * As a contrast, with implicit fencing the kernel keeps track of any
1045 * ongoing rendering, and automatically ensures that the atomic update waits
1046 * for any pending rendering to complete. For shared buffers represented with
1047 * a &struct dma_buf this is tracked in &struct dma_resv.
1048 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
1049 * whereas explicit fencing is what Android wants.
1050 *
1051 * "IN_FENCE_FD”:
1052 * Use this property to pass a fence that DRM should wait on before
1053 * proceeding with the Atomic Commit request and show the framebuffer for
1054 * the plane on the screen. The fence can be either a normal fence or a
1055 * merged one, the sync_file framework will handle both cases and use a
1056 * fence_array if a merged fence is received. Passing -1 here means no
1057 * fences to wait on.
1058 *
1059 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
1060 * it will only check if the Sync File is a valid one.
1061 *
1062 * On the driver side the fence is stored on the @fence parameter of
1063 * &struct drm_plane_state. Drivers which also support implicit fencing
1064 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
1065 * to make sure there's consistent behaviour between drivers in precedence
1066 * of implicit vs. explicit fencing.
1067 *
1068 * "OUT_FENCE_PTR”:
1069 * Use this property to pass a file descriptor pointer to DRM. Once the
1070 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
1071 * the file descriptor number of a Sync File. This Sync File contains the
1072 * CRTC fence that will be signaled when all framebuffers present on the
1073 * Atomic Commit * request for that given CRTC are scanned out on the
1074 * screen.
1075 *
1076 * The Atomic Commit request fails if a invalid pointer is passed. If the
1077 * Atomic Commit request fails for any other reason the out fence fd
1078 * returned will be -1. On a Atomic Commit with the
1079 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
1080 *
1081 * Note that out-fences don't have a special interface to drivers and are
1082 * internally represented by a &struct drm_pending_vblank_event in struct
1083 * &drm_crtc_state, which is also used by the nonblocking atomic commit
1084 * helpers and for the DRM event handling for existing userspace.
1085 */
1086
1087struct drm_out_fence_state {
1088 s32 __user *out_fence_ptr;
1089 struct sync_file *sync_file;
1090 int fd;
1091};
1092
1093static int setup_out_fence(struct drm_out_fence_state *fence_state,
1094 struct dma_fence *fence)
1095{
1096 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
1097 if (fence_state->fd < 0)
1098 return fence_state->fd;
1099
1100 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
1101 return -EFAULT;
1102
1103 fence_state->sync_file = sync_file_create(fence);
1104 if (!fence_state->sync_file)
1105 return -ENOMEM;
1106
1107 return 0;
1108}
1109
1110static int prepare_signaling(struct drm_device *dev,
1111 struct drm_atomic_state *state,
1112 struct drm_mode_atomic *arg,
1113 struct drm_file *file_priv,
1114 struct drm_out_fence_state **fence_state,
1115 unsigned int *num_fences)
1116{
1117 struct drm_crtc *crtc;
1118 struct drm_crtc_state *crtc_state;
1119 struct drm_connector *conn;
1120 struct drm_connector_state *conn_state;
1121 int i, c = 0, ret;
1122
1123 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
1124 return 0;
1125
1126 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1127 s32 __user *fence_ptr;
1128
1129 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
1130
1131 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
1132 struct drm_pending_vblank_event *e;
1133
1134 e = create_vblank_event(crtc, arg->user_data);
1135 if (!e)
1136 return -ENOMEM;
1137
1138 crtc_state->event = e;
1139 }
1140
1141 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1142 struct drm_pending_vblank_event *e = crtc_state->event;
1143
1144 if (!file_priv)
1145 continue;
1146
1147 ret = drm_event_reserve_init(dev, file_priv, &e->base,
1148 &e->event.base);
1149 if (ret) {
1150 kfree(e);
1151 crtc_state->event = NULL;
1152 return ret;
1153 }
1154 }
1155
1156 if (fence_ptr) {
1157 struct dma_fence *fence;
1158 struct drm_out_fence_state *f;
1159
1160 f = krealloc(*fence_state, sizeof(**fence_state) *
1161 (*num_fences + 1), GFP_KERNEL);
1162 if (!f)
1163 return -ENOMEM;
1164
1165 memset(&f[*num_fences], 0, sizeof(*f));
1166
1167 f[*num_fences].out_fence_ptr = fence_ptr;
1168 *fence_state = f;
1169
1170 fence = drm_crtc_create_fence(crtc);
1171 if (!fence)
1172 return -ENOMEM;
1173
1174 ret = setup_out_fence(&f[(*num_fences)++], fence);
1175 if (ret) {
1176 dma_fence_put(fence);
1177 return ret;
1178 }
1179
1180 crtc_state->event->base.fence = fence;
1181 }
1182
1183 c++;
1184 }
1185
1186 for_each_new_connector_in_state(state, conn, conn_state, i) {
1187 struct drm_writeback_connector *wb_conn;
1188 struct drm_out_fence_state *f;
1189 struct dma_fence *fence;
1190 s32 __user *fence_ptr;
1191
1192 if (!conn_state->writeback_job)
1193 continue;
1194
1195 fence_ptr = get_out_fence_for_connector(state, conn);
1196 if (!fence_ptr)
1197 continue;
1198
1199 f = krealloc(*fence_state, sizeof(**fence_state) *
1200 (*num_fences + 1), GFP_KERNEL);
1201 if (!f)
1202 return -ENOMEM;
1203
1204 memset(&f[*num_fences], 0, sizeof(*f));
1205
1206 f[*num_fences].out_fence_ptr = fence_ptr;
1207 *fence_state = f;
1208
1209 wb_conn = drm_connector_to_writeback(conn);
1210 fence = drm_writeback_get_out_fence(wb_conn);
1211 if (!fence)
1212 return -ENOMEM;
1213
1214 ret = setup_out_fence(&f[(*num_fences)++], fence);
1215 if (ret) {
1216 dma_fence_put(fence);
1217 return ret;
1218 }
1219
1220 conn_state->writeback_job->out_fence = fence;
1221 }
1222
1223 /*
1224 * Having this flag means user mode pends on event which will never
1225 * reach due to lack of at least one CRTC for signaling
1226 */
1227 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1228 return -EINVAL;
1229
1230 return 0;
1231}
1232
1233static void complete_signaling(struct drm_device *dev,
1234 struct drm_atomic_state *state,
1235 struct drm_out_fence_state *fence_state,
1236 unsigned int num_fences,
1237 bool install_fds)
1238{
1239 struct drm_crtc *crtc;
1240 struct drm_crtc_state *crtc_state;
1241 int i;
1242
1243 if (install_fds) {
1244 for (i = 0; i < num_fences; i++)
1245 fd_install(fence_state[i].fd,
1246 fence_state[i].sync_file->file);
1247
1248 kfree(fence_state);
1249 return;
1250 }
1251
1252 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1253 struct drm_pending_vblank_event *event = crtc_state->event;
1254 /*
1255 * Free the allocated event. drm_atomic_helper_setup_commit
1256 * can allocate an event too, so only free it if it's ours
1257 * to prevent a double free in drm_atomic_state_clear.
1258 */
1259 if (event && (event->base.fence || event->base.file_priv)) {
1260 drm_event_cancel_free(dev, &event->base);
1261 crtc_state->event = NULL;
1262 }
1263 }
1264
1265 if (!fence_state)
1266 return;
1267
1268 for (i = 0; i < num_fences; i++) {
1269 if (fence_state[i].sync_file)
1270 fput(fence_state[i].sync_file->file);
1271 if (fence_state[i].fd >= 0)
1272 put_unused_fd(fence_state[i].fd);
1273
1274 /* If this fails log error to the user */
1275 if (fence_state[i].out_fence_ptr &&
1276 put_user(-1, fence_state[i].out_fence_ptr))
1277 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
1278 }
1279
1280 kfree(fence_state);
1281}
1282
1283int drm_mode_atomic_ioctl(struct drm_device *dev,
1284 void *data, struct drm_file *file_priv)
1285{
1286 struct drm_mode_atomic *arg = data;
1287 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1288 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1289 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1290 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1291 unsigned int copied_objs, copied_props;
1292 struct drm_atomic_state *state;
1293 struct drm_modeset_acquire_ctx ctx;
1294 struct drm_out_fence_state *fence_state;
1295 int ret = 0;
1296 unsigned int i, j, num_fences;
1297
1298 /* disallow for drivers not supporting atomic: */
1299 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1300 return -EOPNOTSUPP;
1301
1302 /* disallow for userspace that has not enabled atomic cap (even
1303 * though this may be a bit overkill, since legacy userspace
1304 * wouldn't know how to call this ioctl)
1305 */
1306 if (!file_priv->atomic)
1307 return -EINVAL;
1308
1309 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
1310 return -EINVAL;
1311
1312 if (arg->reserved)
1313 return -EINVAL;
1314
1315 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC)
1316 return -EINVAL;
1317
1318 /* can't test and expect an event at the same time. */
1319 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1320 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1321 return -EINVAL;
1322
1323 state = drm_atomic_state_alloc(dev);
1324 if (!state)
1325 return -ENOMEM;
1326
1327 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1328 state->acquire_ctx = &ctx;
1329 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1330
1331retry:
1332 copied_objs = 0;
1333 copied_props = 0;
1334 fence_state = NULL;
1335 num_fences = 0;
1336
1337 for (i = 0; i < arg->count_objs; i++) {
1338 uint32_t obj_id, count_props;
1339 struct drm_mode_object *obj;
1340
1341 if (get_user(obj_id, objs_ptr + copied_objs)) {
1342 ret = -EFAULT;
1343 goto out;
1344 }
1345
1346 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
1347 if (!obj) {
1348 ret = -ENOENT;
1349 goto out;
1350 }
1351
1352 if (!obj->properties) {
1353 drm_mode_object_put(obj);
1354 ret = -ENOENT;
1355 goto out;
1356 }
1357
1358 if (get_user(count_props, count_props_ptr + copied_objs)) {
1359 drm_mode_object_put(obj);
1360 ret = -EFAULT;
1361 goto out;
1362 }
1363
1364 copied_objs++;
1365
1366 for (j = 0; j < count_props; j++) {
1367 uint32_t prop_id;
1368 uint64_t prop_value;
1369 struct drm_property *prop;
1370
1371 if (get_user(prop_id, props_ptr + copied_props)) {
1372 drm_mode_object_put(obj);
1373 ret = -EFAULT;
1374 goto out;
1375 }
1376
1377 prop = drm_mode_obj_find_prop_id(obj, prop_id);
1378 if (!prop) {
1379 drm_mode_object_put(obj);
1380 ret = -ENOENT;
1381 goto out;
1382 }
1383
1384 if (copy_from_user(&prop_value,
1385 prop_values_ptr + copied_props,
1386 sizeof(prop_value))) {
1387 drm_mode_object_put(obj);
1388 ret = -EFAULT;
1389 goto out;
1390 }
1391
1392 ret = drm_atomic_set_property(state, file_priv,
1393 obj, prop, prop_value);
1394 if (ret) {
1395 drm_mode_object_put(obj);
1396 goto out;
1397 }
1398
1399 copied_props++;
1400 }
1401
1402 drm_mode_object_put(obj);
1403 }
1404
1405 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state,
1406 &num_fences);
1407 if (ret)
1408 goto out;
1409
1410 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1411 ret = drm_atomic_check_only(state);
1412 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1413 ret = drm_atomic_nonblocking_commit(state);
1414 } else {
1415 if (drm_debug_enabled(DRM_UT_STATE))
1416 drm_atomic_print_state(state);
1417
1418 ret = drm_atomic_commit(state);
1419 }
1420
1421out:
1422 complete_signaling(dev, state, fence_state, num_fences, !ret);
1423
1424 if (ret == -EDEADLK) {
1425 drm_atomic_state_clear(state);
1426 ret = drm_modeset_backoff(&ctx);
1427 if (!ret)
1428 goto retry;
1429 }
1430
1431 drm_atomic_state_put(state);
1432
1433 drm_modeset_drop_locks(&ctx);
1434 drm_modeset_acquire_fini(&ctx);
1435
1436 return ret;
1437}