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1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 * Copyright (C) 2018 Intel Corp.
5 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 * Rob Clark <robdclark@gmail.com>
27 * Daniel Vetter <daniel.vetter@ffwll.ch>
28 */
29
30#include <drm/drm_atomic_uapi.h>
31#include <drm/drm_atomic.h>
32#include <drm/drm_print.h>
33#include <drm/drm_drv.h>
34#include <drm/drm_writeback.h>
35#include <drm/drm_vblank.h>
36
37#include <linux/dma-fence.h>
38#include <linux/uaccess.h>
39#include <linux/sync_file.h>
40#include <linux/file.h>
41
42#include "drm_crtc_internal.h"
43
44/**
45 * DOC: overview
46 *
47 * This file contains the marshalling and demarshalling glue for the atomic UAPI
48 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and
49 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and
50 * drivers which have special needs to construct their own atomic updates, e.g.
51 * for load detect or similiar.
52 */
53
54/**
55 * drm_atomic_set_mode_for_crtc - set mode for CRTC
56 * @state: the CRTC whose incoming state to update
57 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
58 *
59 * Set a mode (originating from the kernel) on the desired CRTC state and update
60 * the enable property.
61 *
62 * RETURNS:
63 * Zero on success, error code on failure. Cannot return -EDEADLK.
64 */
65int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
66 const struct drm_display_mode *mode)
67{
68 struct drm_crtc *crtc = state->crtc;
69 struct drm_mode_modeinfo umode;
70
71 /* Early return for no change. */
72 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
73 return 0;
74
75 drm_property_blob_put(state->mode_blob);
76 state->mode_blob = NULL;
77
78 if (mode) {
79 drm_mode_convert_to_umode(&umode, mode);
80 state->mode_blob =
81 drm_property_create_blob(state->crtc->dev,
82 sizeof(umode),
83 &umode);
84 if (IS_ERR(state->mode_blob))
85 return PTR_ERR(state->mode_blob);
86
87 drm_mode_copy(&state->mode, mode);
88 state->enable = true;
89 drm_dbg_atomic(crtc->dev,
90 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
91 mode->name, crtc->base.id, crtc->name, state);
92 } else {
93 memset(&state->mode, 0, sizeof(state->mode));
94 state->enable = false;
95 drm_dbg_atomic(crtc->dev,
96 "Set [NOMODE] for [CRTC:%d:%s] state %p\n",
97 crtc->base.id, crtc->name, state);
98 }
99
100 return 0;
101}
102EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
103
104/**
105 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
106 * @state: the CRTC whose incoming state to update
107 * @blob: pointer to blob property to use for mode
108 *
109 * Set a mode (originating from a blob property) on the desired CRTC state.
110 * This function will take a reference on the blob property for the CRTC state,
111 * and release the reference held on the state's existing mode property, if any
112 * was set.
113 *
114 * RETURNS:
115 * Zero on success, error code on failure. Cannot return -EDEADLK.
116 */
117int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
118 struct drm_property_blob *blob)
119{
120 struct drm_crtc *crtc = state->crtc;
121
122 if (blob == state->mode_blob)
123 return 0;
124
125 drm_property_blob_put(state->mode_blob);
126 state->mode_blob = NULL;
127
128 memset(&state->mode, 0, sizeof(state->mode));
129
130 if (blob) {
131 int ret;
132
133 if (blob->length != sizeof(struct drm_mode_modeinfo)) {
134 drm_dbg_atomic(crtc->dev,
135 "[CRTC:%d:%s] bad mode blob length: %zu\n",
136 crtc->base.id, crtc->name,
137 blob->length);
138 return -EINVAL;
139 }
140
141 ret = drm_mode_convert_umode(crtc->dev,
142 &state->mode, blob->data);
143 if (ret) {
144 drm_dbg_atomic(crtc->dev,
145 "[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n",
146 crtc->base.id, crtc->name,
147 ret, drm_get_mode_status_name(state->mode.status));
148 drm_mode_debug_printmodeline(&state->mode);
149 return -EINVAL;
150 }
151
152 state->mode_blob = drm_property_blob_get(blob);
153 state->enable = true;
154 drm_dbg_atomic(crtc->dev,
155 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
156 state->mode.name, crtc->base.id, crtc->name,
157 state);
158 } else {
159 state->enable = false;
160 drm_dbg_atomic(crtc->dev,
161 "Set [NOMODE] for [CRTC:%d:%s] state %p\n",
162 crtc->base.id, crtc->name, state);
163 }
164
165 return 0;
166}
167EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
168
169/**
170 * drm_atomic_set_crtc_for_plane - set CRTC for plane
171 * @plane_state: the plane whose incoming state to update
172 * @crtc: CRTC to use for the plane
173 *
174 * Changing the assigned CRTC for a plane requires us to grab the lock and state
175 * for the new CRTC, as needed. This function takes care of all these details
176 * besides updating the pointer in the state object itself.
177 *
178 * Returns:
179 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
180 * then the w/w mutex code has detected a deadlock and the entire atomic
181 * sequence must be restarted. All other errors are fatal.
182 */
183int
184drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
185 struct drm_crtc *crtc)
186{
187 struct drm_plane *plane = plane_state->plane;
188 struct drm_crtc_state *crtc_state;
189 /* Nothing to do for same crtc*/
190 if (plane_state->crtc == crtc)
191 return 0;
192 if (plane_state->crtc) {
193 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
194 plane_state->crtc);
195 if (WARN_ON(IS_ERR(crtc_state)))
196 return PTR_ERR(crtc_state);
197
198 crtc_state->plane_mask &= ~drm_plane_mask(plane);
199 }
200
201 plane_state->crtc = crtc;
202
203 if (crtc) {
204 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
205 crtc);
206 if (IS_ERR(crtc_state))
207 return PTR_ERR(crtc_state);
208 crtc_state->plane_mask |= drm_plane_mask(plane);
209 }
210
211 if (crtc)
212 drm_dbg_atomic(plane->dev,
213 "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n",
214 plane->base.id, plane->name, plane_state,
215 crtc->base.id, crtc->name);
216 else
217 drm_dbg_atomic(plane->dev,
218 "Link [PLANE:%d:%s] state %p to [NOCRTC]\n",
219 plane->base.id, plane->name, plane_state);
220
221 return 0;
222}
223EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
224
225/**
226 * drm_atomic_set_fb_for_plane - set framebuffer for plane
227 * @plane_state: atomic state object for the plane
228 * @fb: fb to use for the plane
229 *
230 * Changing the assigned framebuffer for a plane requires us to grab a reference
231 * to the new fb and drop the reference to the old fb, if there is one. This
232 * function takes care of all these details besides updating the pointer in the
233 * state object itself.
234 */
235void
236drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
237 struct drm_framebuffer *fb)
238{
239 struct drm_plane *plane = plane_state->plane;
240
241 if (fb)
242 drm_dbg_atomic(plane->dev,
243 "Set [FB:%d] for [PLANE:%d:%s] state %p\n",
244 fb->base.id, plane->base.id, plane->name,
245 plane_state);
246 else
247 drm_dbg_atomic(plane->dev,
248 "Set [NOFB] for [PLANE:%d:%s] state %p\n",
249 plane->base.id, plane->name, plane_state);
250
251 drm_framebuffer_assign(&plane_state->fb, fb);
252}
253EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
254
255/**
256 * drm_atomic_set_fence_for_plane - set fence for plane
257 * @plane_state: atomic state object for the plane
258 * @fence: dma_fence to use for the plane
259 *
260 * Helper to setup the plane_state fence in case it is not set yet.
261 * By using this drivers doesn't need to worry if the user choose
262 * implicit or explicit fencing.
263 *
264 * This function will not set the fence to the state if it was set
265 * via explicit fencing interfaces on the atomic ioctl. In that case it will
266 * drop the reference to the fence as we are not storing it anywhere.
267 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
268 * with the received implicit fence. In both cases this function consumes a
269 * reference for @fence.
270 *
271 * This way explicit fencing can be used to overrule implicit fencing, which is
272 * important to make explicit fencing use-cases work: One example is using one
273 * buffer for 2 screens with different refresh rates. Implicit fencing will
274 * clamp rendering to the refresh rate of the slower screen, whereas explicit
275 * fence allows 2 independent render and display loops on a single buffer. If a
276 * driver allows obeys both implicit and explicit fences for plane updates, then
277 * it will break all the benefits of explicit fencing.
278 */
279void
280drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
281 struct dma_fence *fence)
282{
283 if (plane_state->fence) {
284 dma_fence_put(fence);
285 return;
286 }
287
288 plane_state->fence = fence;
289}
290EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
291
292/**
293 * drm_atomic_set_crtc_for_connector - set CRTC for connector
294 * @conn_state: atomic state object for the connector
295 * @crtc: CRTC to use for the connector
296 *
297 * Changing the assigned CRTC for a connector requires us to grab the lock and
298 * state for the new CRTC, as needed. This function takes care of all these
299 * details besides updating the pointer in the state object itself.
300 *
301 * Returns:
302 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
303 * then the w/w mutex code has detected a deadlock and the entire atomic
304 * sequence must be restarted. All other errors are fatal.
305 */
306int
307drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
308 struct drm_crtc *crtc)
309{
310 struct drm_connector *connector = conn_state->connector;
311 struct drm_crtc_state *crtc_state;
312
313 if (conn_state->crtc == crtc)
314 return 0;
315
316 if (conn_state->crtc) {
317 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
318 conn_state->crtc);
319
320 crtc_state->connector_mask &=
321 ~drm_connector_mask(conn_state->connector);
322
323 drm_connector_put(conn_state->connector);
324 conn_state->crtc = NULL;
325 }
326
327 if (crtc) {
328 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
329 if (IS_ERR(crtc_state))
330 return PTR_ERR(crtc_state);
331
332 crtc_state->connector_mask |=
333 drm_connector_mask(conn_state->connector);
334
335 drm_connector_get(conn_state->connector);
336 conn_state->crtc = crtc;
337
338 drm_dbg_atomic(connector->dev,
339 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n",
340 connector->base.id, connector->name,
341 conn_state, crtc->base.id, crtc->name);
342 } else {
343 drm_dbg_atomic(connector->dev,
344 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n",
345 connector->base.id, connector->name,
346 conn_state);
347 }
348
349 return 0;
350}
351EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
352
353static void set_out_fence_for_crtc(struct drm_atomic_state *state,
354 struct drm_crtc *crtc, s32 __user *fence_ptr)
355{
356 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
357}
358
359static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
360 struct drm_crtc *crtc)
361{
362 s32 __user *fence_ptr;
363
364 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
365 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
366
367 return fence_ptr;
368}
369
370static int set_out_fence_for_connector(struct drm_atomic_state *state,
371 struct drm_connector *connector,
372 s32 __user *fence_ptr)
373{
374 unsigned int index = drm_connector_index(connector);
375
376 if (!fence_ptr)
377 return 0;
378
379 if (put_user(-1, fence_ptr))
380 return -EFAULT;
381
382 state->connectors[index].out_fence_ptr = fence_ptr;
383
384 return 0;
385}
386
387static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state,
388 struct drm_connector *connector)
389{
390 unsigned int index = drm_connector_index(connector);
391 s32 __user *fence_ptr;
392
393 fence_ptr = state->connectors[index].out_fence_ptr;
394 state->connectors[index].out_fence_ptr = NULL;
395
396 return fence_ptr;
397}
398
399static int
400drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
401 struct drm_property_blob **blob,
402 uint64_t blob_id,
403 ssize_t expected_size,
404 ssize_t expected_elem_size,
405 bool *replaced)
406{
407 struct drm_property_blob *new_blob = NULL;
408
409 if (blob_id != 0) {
410 new_blob = drm_property_lookup_blob(dev, blob_id);
411 if (new_blob == NULL)
412 return -EINVAL;
413
414 if (expected_size > 0 &&
415 new_blob->length != expected_size) {
416 drm_property_blob_put(new_blob);
417 return -EINVAL;
418 }
419 if (expected_elem_size > 0 &&
420 new_blob->length % expected_elem_size != 0) {
421 drm_property_blob_put(new_blob);
422 return -EINVAL;
423 }
424 }
425
426 *replaced |= drm_property_replace_blob(blob, new_blob);
427 drm_property_blob_put(new_blob);
428
429 return 0;
430}
431
432static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
433 struct drm_crtc_state *state, struct drm_property *property,
434 uint64_t val)
435{
436 struct drm_device *dev = crtc->dev;
437 struct drm_mode_config *config = &dev->mode_config;
438 bool replaced = false;
439 int ret;
440
441 if (property == config->prop_active)
442 state->active = val;
443 else if (property == config->prop_mode_id) {
444 struct drm_property_blob *mode =
445 drm_property_lookup_blob(dev, val);
446 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
447 drm_property_blob_put(mode);
448 return ret;
449 } else if (property == config->prop_vrr_enabled) {
450 state->vrr_enabled = val;
451 } else if (property == config->degamma_lut_property) {
452 ret = drm_atomic_replace_property_blob_from_id(dev,
453 &state->degamma_lut,
454 val,
455 -1, sizeof(struct drm_color_lut),
456 &replaced);
457 state->color_mgmt_changed |= replaced;
458 return ret;
459 } else if (property == config->ctm_property) {
460 ret = drm_atomic_replace_property_blob_from_id(dev,
461 &state->ctm,
462 val,
463 sizeof(struct drm_color_ctm), -1,
464 &replaced);
465 state->color_mgmt_changed |= replaced;
466 return ret;
467 } else if (property == config->gamma_lut_property) {
468 ret = drm_atomic_replace_property_blob_from_id(dev,
469 &state->gamma_lut,
470 val,
471 -1, sizeof(struct drm_color_lut),
472 &replaced);
473 state->color_mgmt_changed |= replaced;
474 return ret;
475 } else if (property == config->prop_out_fence_ptr) {
476 s32 __user *fence_ptr = u64_to_user_ptr(val);
477
478 if (!fence_ptr)
479 return 0;
480
481 if (put_user(-1, fence_ptr))
482 return -EFAULT;
483
484 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
485 } else if (property == crtc->scaling_filter_property) {
486 state->scaling_filter = val;
487 } else if (crtc->funcs->atomic_set_property) {
488 return crtc->funcs->atomic_set_property(crtc, state, property, val);
489 } else {
490 drm_dbg_atomic(crtc->dev,
491 "[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
492 crtc->base.id, crtc->name,
493 property->base.id, property->name);
494 return -EINVAL;
495 }
496
497 return 0;
498}
499
500static int
501drm_atomic_crtc_get_property(struct drm_crtc *crtc,
502 const struct drm_crtc_state *state,
503 struct drm_property *property, uint64_t *val)
504{
505 struct drm_device *dev = crtc->dev;
506 struct drm_mode_config *config = &dev->mode_config;
507
508 if (property == config->prop_active)
509 *val = drm_atomic_crtc_effectively_active(state);
510 else if (property == config->prop_mode_id)
511 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
512 else if (property == config->prop_vrr_enabled)
513 *val = state->vrr_enabled;
514 else if (property == config->degamma_lut_property)
515 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
516 else if (property == config->ctm_property)
517 *val = (state->ctm) ? state->ctm->base.id : 0;
518 else if (property == config->gamma_lut_property)
519 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
520 else if (property == config->prop_out_fence_ptr)
521 *val = 0;
522 else if (property == crtc->scaling_filter_property)
523 *val = state->scaling_filter;
524 else if (crtc->funcs->atomic_get_property)
525 return crtc->funcs->atomic_get_property(crtc, state, property, val);
526 else
527 return -EINVAL;
528
529 return 0;
530}
531
532static int drm_atomic_plane_set_property(struct drm_plane *plane,
533 struct drm_plane_state *state, struct drm_file *file_priv,
534 struct drm_property *property, uint64_t val)
535{
536 struct drm_device *dev = plane->dev;
537 struct drm_mode_config *config = &dev->mode_config;
538 bool replaced = false;
539 int ret;
540
541 if (property == config->prop_fb_id) {
542 struct drm_framebuffer *fb;
543
544 fb = drm_framebuffer_lookup(dev, file_priv, val);
545 drm_atomic_set_fb_for_plane(state, fb);
546 if (fb)
547 drm_framebuffer_put(fb);
548 } else if (property == config->prop_in_fence_fd) {
549 if (state->fence)
550 return -EINVAL;
551
552 if (U642I64(val) == -1)
553 return 0;
554
555 state->fence = sync_file_get_fence(val);
556 if (!state->fence)
557 return -EINVAL;
558
559 } else if (property == config->prop_crtc_id) {
560 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
561
562 if (val && !crtc)
563 return -EACCES;
564 return drm_atomic_set_crtc_for_plane(state, crtc);
565 } else if (property == config->prop_crtc_x) {
566 state->crtc_x = U642I64(val);
567 } else if (property == config->prop_crtc_y) {
568 state->crtc_y = U642I64(val);
569 } else if (property == config->prop_crtc_w) {
570 state->crtc_w = val;
571 } else if (property == config->prop_crtc_h) {
572 state->crtc_h = val;
573 } else if (property == config->prop_src_x) {
574 state->src_x = val;
575 } else if (property == config->prop_src_y) {
576 state->src_y = val;
577 } else if (property == config->prop_src_w) {
578 state->src_w = val;
579 } else if (property == config->prop_src_h) {
580 state->src_h = val;
581 } else if (property == plane->alpha_property) {
582 state->alpha = val;
583 } else if (property == plane->blend_mode_property) {
584 state->pixel_blend_mode = val;
585 } else if (property == plane->rotation_property) {
586 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {
587 drm_dbg_atomic(plane->dev,
588 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",
589 plane->base.id, plane->name, val);
590 return -EINVAL;
591 }
592 state->rotation = val;
593 } else if (property == plane->zpos_property) {
594 state->zpos = val;
595 } else if (property == plane->color_encoding_property) {
596 state->color_encoding = val;
597 } else if (property == plane->color_range_property) {
598 state->color_range = val;
599 } else if (property == config->prop_fb_damage_clips) {
600 ret = drm_atomic_replace_property_blob_from_id(dev,
601 &state->fb_damage_clips,
602 val,
603 -1,
604 sizeof(struct drm_rect),
605 &replaced);
606 return ret;
607 } else if (property == plane->scaling_filter_property) {
608 state->scaling_filter = val;
609 } else if (plane->funcs->atomic_set_property) {
610 return plane->funcs->atomic_set_property(plane, state,
611 property, val);
612 } else {
613 drm_dbg_atomic(plane->dev,
614 "[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n",
615 plane->base.id, plane->name,
616 property->base.id, property->name);
617 return -EINVAL;
618 }
619
620 return 0;
621}
622
623static int
624drm_atomic_plane_get_property(struct drm_plane *plane,
625 const struct drm_plane_state *state,
626 struct drm_property *property, uint64_t *val)
627{
628 struct drm_device *dev = plane->dev;
629 struct drm_mode_config *config = &dev->mode_config;
630
631 if (property == config->prop_fb_id) {
632 *val = (state->fb) ? state->fb->base.id : 0;
633 } else if (property == config->prop_in_fence_fd) {
634 *val = -1;
635 } else if (property == config->prop_crtc_id) {
636 *val = (state->crtc) ? state->crtc->base.id : 0;
637 } else if (property == config->prop_crtc_x) {
638 *val = I642U64(state->crtc_x);
639 } else if (property == config->prop_crtc_y) {
640 *val = I642U64(state->crtc_y);
641 } else if (property == config->prop_crtc_w) {
642 *val = state->crtc_w;
643 } else if (property == config->prop_crtc_h) {
644 *val = state->crtc_h;
645 } else if (property == config->prop_src_x) {
646 *val = state->src_x;
647 } else if (property == config->prop_src_y) {
648 *val = state->src_y;
649 } else if (property == config->prop_src_w) {
650 *val = state->src_w;
651 } else if (property == config->prop_src_h) {
652 *val = state->src_h;
653 } else if (property == plane->alpha_property) {
654 *val = state->alpha;
655 } else if (property == plane->blend_mode_property) {
656 *val = state->pixel_blend_mode;
657 } else if (property == plane->rotation_property) {
658 *val = state->rotation;
659 } else if (property == plane->zpos_property) {
660 *val = state->zpos;
661 } else if (property == plane->color_encoding_property) {
662 *val = state->color_encoding;
663 } else if (property == plane->color_range_property) {
664 *val = state->color_range;
665 } else if (property == config->prop_fb_damage_clips) {
666 *val = (state->fb_damage_clips) ?
667 state->fb_damage_clips->base.id : 0;
668 } else if (property == plane->scaling_filter_property) {
669 *val = state->scaling_filter;
670 } else if (plane->funcs->atomic_get_property) {
671 return plane->funcs->atomic_get_property(plane, state, property, val);
672 } else {
673 return -EINVAL;
674 }
675
676 return 0;
677}
678
679static int drm_atomic_set_writeback_fb_for_connector(
680 struct drm_connector_state *conn_state,
681 struct drm_framebuffer *fb)
682{
683 int ret;
684 struct drm_connector *conn = conn_state->connector;
685
686 ret = drm_writeback_set_fb(conn_state, fb);
687 if (ret < 0)
688 return ret;
689
690 if (fb)
691 drm_dbg_atomic(conn->dev,
692 "Set [FB:%d] for connector state %p\n",
693 fb->base.id, conn_state);
694 else
695 drm_dbg_atomic(conn->dev,
696 "Set [NOFB] for connector state %p\n",
697 conn_state);
698
699 return 0;
700}
701
702static int drm_atomic_connector_set_property(struct drm_connector *connector,
703 struct drm_connector_state *state, struct drm_file *file_priv,
704 struct drm_property *property, uint64_t val)
705{
706 struct drm_device *dev = connector->dev;
707 struct drm_mode_config *config = &dev->mode_config;
708 bool replaced = false;
709 int ret;
710
711 if (property == config->prop_crtc_id) {
712 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
713
714 if (val && !crtc)
715 return -EACCES;
716 return drm_atomic_set_crtc_for_connector(state, crtc);
717 } else if (property == config->dpms_property) {
718 /* setting DPMS property requires special handling, which
719 * is done in legacy setprop path for us. Disallow (for
720 * now?) atomic writes to DPMS property:
721 */
722 return -EINVAL;
723 } else if (property == config->tv_select_subconnector_property) {
724 state->tv.subconnector = val;
725 } else if (property == config->tv_left_margin_property) {
726 state->tv.margins.left = val;
727 } else if (property == config->tv_right_margin_property) {
728 state->tv.margins.right = val;
729 } else if (property == config->tv_top_margin_property) {
730 state->tv.margins.top = val;
731 } else if (property == config->tv_bottom_margin_property) {
732 state->tv.margins.bottom = val;
733 } else if (property == config->tv_mode_property) {
734 state->tv.mode = val;
735 } else if (property == config->tv_brightness_property) {
736 state->tv.brightness = val;
737 } else if (property == config->tv_contrast_property) {
738 state->tv.contrast = val;
739 } else if (property == config->tv_flicker_reduction_property) {
740 state->tv.flicker_reduction = val;
741 } else if (property == config->tv_overscan_property) {
742 state->tv.overscan = val;
743 } else if (property == config->tv_saturation_property) {
744 state->tv.saturation = val;
745 } else if (property == config->tv_hue_property) {
746 state->tv.hue = val;
747 } else if (property == config->link_status_property) {
748 /* Never downgrade from GOOD to BAD on userspace's request here,
749 * only hw issues can do that.
750 *
751 * For an atomic property the userspace doesn't need to be able
752 * to understand all the properties, but needs to be able to
753 * restore the state it wants on VT switch. So if the userspace
754 * tries to change the link_status from GOOD to BAD, driver
755 * silently rejects it and returns a 0. This prevents userspace
756 * from accidently breaking the display when it restores the
757 * state.
758 */
759 if (state->link_status != DRM_LINK_STATUS_GOOD)
760 state->link_status = val;
761 } else if (property == config->hdr_output_metadata_property) {
762 ret = drm_atomic_replace_property_blob_from_id(dev,
763 &state->hdr_output_metadata,
764 val,
765 sizeof(struct hdr_output_metadata), -1,
766 &replaced);
767 return ret;
768 } else if (property == config->aspect_ratio_property) {
769 state->picture_aspect_ratio = val;
770 } else if (property == config->content_type_property) {
771 state->content_type = val;
772 } else if (property == connector->scaling_mode_property) {
773 state->scaling_mode = val;
774 } else if (property == config->content_protection_property) {
775 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
776 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
777 return -EINVAL;
778 }
779 state->content_protection = val;
780 } else if (property == config->hdcp_content_type_property) {
781 state->hdcp_content_type = val;
782 } else if (property == connector->colorspace_property) {
783 state->colorspace = val;
784 } else if (property == config->writeback_fb_id_property) {
785 struct drm_framebuffer *fb;
786 int ret;
787
788 fb = drm_framebuffer_lookup(dev, file_priv, val);
789 ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
790 if (fb)
791 drm_framebuffer_put(fb);
792 return ret;
793 } else if (property == config->writeback_out_fence_ptr_property) {
794 s32 __user *fence_ptr = u64_to_user_ptr(val);
795
796 return set_out_fence_for_connector(state->state, connector,
797 fence_ptr);
798 } else if (property == connector->max_bpc_property) {
799 state->max_requested_bpc = val;
800 } else if (connector->funcs->atomic_set_property) {
801 return connector->funcs->atomic_set_property(connector,
802 state, property, val);
803 } else {
804 drm_dbg_atomic(connector->dev,
805 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n",
806 connector->base.id, connector->name,
807 property->base.id, property->name);
808 return -EINVAL;
809 }
810
811 return 0;
812}
813
814static int
815drm_atomic_connector_get_property(struct drm_connector *connector,
816 const struct drm_connector_state *state,
817 struct drm_property *property, uint64_t *val)
818{
819 struct drm_device *dev = connector->dev;
820 struct drm_mode_config *config = &dev->mode_config;
821
822 if (property == config->prop_crtc_id) {
823 *val = (state->crtc) ? state->crtc->base.id : 0;
824 } else if (property == config->dpms_property) {
825 if (state->crtc && state->crtc->state->self_refresh_active)
826 *val = DRM_MODE_DPMS_ON;
827 else
828 *val = connector->dpms;
829 } else if (property == config->tv_select_subconnector_property) {
830 *val = state->tv.subconnector;
831 } else if (property == config->tv_left_margin_property) {
832 *val = state->tv.margins.left;
833 } else if (property == config->tv_right_margin_property) {
834 *val = state->tv.margins.right;
835 } else if (property == config->tv_top_margin_property) {
836 *val = state->tv.margins.top;
837 } else if (property == config->tv_bottom_margin_property) {
838 *val = state->tv.margins.bottom;
839 } else if (property == config->tv_mode_property) {
840 *val = state->tv.mode;
841 } else if (property == config->tv_brightness_property) {
842 *val = state->tv.brightness;
843 } else if (property == config->tv_contrast_property) {
844 *val = state->tv.contrast;
845 } else if (property == config->tv_flicker_reduction_property) {
846 *val = state->tv.flicker_reduction;
847 } else if (property == config->tv_overscan_property) {
848 *val = state->tv.overscan;
849 } else if (property == config->tv_saturation_property) {
850 *val = state->tv.saturation;
851 } else if (property == config->tv_hue_property) {
852 *val = state->tv.hue;
853 } else if (property == config->link_status_property) {
854 *val = state->link_status;
855 } else if (property == config->aspect_ratio_property) {
856 *val = state->picture_aspect_ratio;
857 } else if (property == config->content_type_property) {
858 *val = state->content_type;
859 } else if (property == connector->colorspace_property) {
860 *val = state->colorspace;
861 } else if (property == connector->scaling_mode_property) {
862 *val = state->scaling_mode;
863 } else if (property == config->hdr_output_metadata_property) {
864 *val = state->hdr_output_metadata ?
865 state->hdr_output_metadata->base.id : 0;
866 } else if (property == config->content_protection_property) {
867 *val = state->content_protection;
868 } else if (property == config->hdcp_content_type_property) {
869 *val = state->hdcp_content_type;
870 } else if (property == config->writeback_fb_id_property) {
871 /* Writeback framebuffer is one-shot, write and forget */
872 *val = 0;
873 } else if (property == config->writeback_out_fence_ptr_property) {
874 *val = 0;
875 } else if (property == connector->max_bpc_property) {
876 *val = state->max_requested_bpc;
877 } else if (connector->funcs->atomic_get_property) {
878 return connector->funcs->atomic_get_property(connector,
879 state, property, val);
880 } else {
881 return -EINVAL;
882 }
883
884 return 0;
885}
886
887int drm_atomic_get_property(struct drm_mode_object *obj,
888 struct drm_property *property, uint64_t *val)
889{
890 struct drm_device *dev = property->dev;
891 int ret;
892
893 switch (obj->type) {
894 case DRM_MODE_OBJECT_CONNECTOR: {
895 struct drm_connector *connector = obj_to_connector(obj);
896
897 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
898 ret = drm_atomic_connector_get_property(connector,
899 connector->state, property, val);
900 break;
901 }
902 case DRM_MODE_OBJECT_CRTC: {
903 struct drm_crtc *crtc = obj_to_crtc(obj);
904
905 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
906 ret = drm_atomic_crtc_get_property(crtc,
907 crtc->state, property, val);
908 break;
909 }
910 case DRM_MODE_OBJECT_PLANE: {
911 struct drm_plane *plane = obj_to_plane(obj);
912
913 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
914 ret = drm_atomic_plane_get_property(plane,
915 plane->state, property, val);
916 break;
917 }
918 default:
919 ret = -EINVAL;
920 break;
921 }
922
923 return ret;
924}
925
926/*
927 * The big monster ioctl
928 */
929
930static struct drm_pending_vblank_event *create_vblank_event(
931 struct drm_crtc *crtc, uint64_t user_data)
932{
933 struct drm_pending_vblank_event *e = NULL;
934
935 e = kzalloc(sizeof *e, GFP_KERNEL);
936 if (!e)
937 return NULL;
938
939 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
940 e->event.base.length = sizeof(e->event);
941 e->event.vbl.crtc_id = crtc->base.id;
942 e->event.vbl.user_data = user_data;
943
944 return e;
945}
946
947int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
948 struct drm_connector *connector,
949 int mode)
950{
951 struct drm_connector *tmp_connector;
952 struct drm_connector_state *new_conn_state;
953 struct drm_crtc *crtc;
954 struct drm_crtc_state *crtc_state;
955 int i, ret, old_mode = connector->dpms;
956 bool active = false;
957
958 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
959 state->acquire_ctx);
960 if (ret)
961 return ret;
962
963 if (mode != DRM_MODE_DPMS_ON)
964 mode = DRM_MODE_DPMS_OFF;
965 connector->dpms = mode;
966
967 crtc = connector->state->crtc;
968 if (!crtc)
969 goto out;
970 ret = drm_atomic_add_affected_connectors(state, crtc);
971 if (ret)
972 goto out;
973
974 crtc_state = drm_atomic_get_crtc_state(state, crtc);
975 if (IS_ERR(crtc_state)) {
976 ret = PTR_ERR(crtc_state);
977 goto out;
978 }
979
980 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
981 if (new_conn_state->crtc != crtc)
982 continue;
983 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
984 active = true;
985 break;
986 }
987 }
988
989 crtc_state->active = active;
990 ret = drm_atomic_commit(state);
991out:
992 if (ret != 0)
993 connector->dpms = old_mode;
994 return ret;
995}
996
997int drm_atomic_set_property(struct drm_atomic_state *state,
998 struct drm_file *file_priv,
999 struct drm_mode_object *obj,
1000 struct drm_property *prop,
1001 uint64_t prop_value)
1002{
1003 struct drm_mode_object *ref;
1004 int ret;
1005
1006 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1007 return -EINVAL;
1008
1009 switch (obj->type) {
1010 case DRM_MODE_OBJECT_CONNECTOR: {
1011 struct drm_connector *connector = obj_to_connector(obj);
1012 struct drm_connector_state *connector_state;
1013
1014 connector_state = drm_atomic_get_connector_state(state, connector);
1015 if (IS_ERR(connector_state)) {
1016 ret = PTR_ERR(connector_state);
1017 break;
1018 }
1019
1020 ret = drm_atomic_connector_set_property(connector,
1021 connector_state, file_priv,
1022 prop, prop_value);
1023 break;
1024 }
1025 case DRM_MODE_OBJECT_CRTC: {
1026 struct drm_crtc *crtc = obj_to_crtc(obj);
1027 struct drm_crtc_state *crtc_state;
1028
1029 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1030 if (IS_ERR(crtc_state)) {
1031 ret = PTR_ERR(crtc_state);
1032 break;
1033 }
1034
1035 ret = drm_atomic_crtc_set_property(crtc,
1036 crtc_state, prop, prop_value);
1037 break;
1038 }
1039 case DRM_MODE_OBJECT_PLANE: {
1040 struct drm_plane *plane = obj_to_plane(obj);
1041 struct drm_plane_state *plane_state;
1042
1043 plane_state = drm_atomic_get_plane_state(state, plane);
1044 if (IS_ERR(plane_state)) {
1045 ret = PTR_ERR(plane_state);
1046 break;
1047 }
1048
1049 ret = drm_atomic_plane_set_property(plane,
1050 plane_state, file_priv,
1051 prop, prop_value);
1052 break;
1053 }
1054 default:
1055 ret = -EINVAL;
1056 break;
1057 }
1058
1059 drm_property_change_valid_put(prop, ref);
1060 return ret;
1061}
1062
1063/**
1064 * DOC: explicit fencing properties
1065 *
1066 * Explicit fencing allows userspace to control the buffer synchronization
1067 * between devices. A Fence or a group of fences are transfered to/from
1068 * userspace using Sync File fds and there are two DRM properties for that.
1069 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
1070 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
1071 *
1072 * As a contrast, with implicit fencing the kernel keeps track of any
1073 * ongoing rendering, and automatically ensures that the atomic update waits
1074 * for any pending rendering to complete. For shared buffers represented with
1075 * a &struct dma_buf this is tracked in &struct dma_resv.
1076 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
1077 * whereas explicit fencing is what Android wants.
1078 *
1079 * "IN_FENCE_FD”:
1080 * Use this property to pass a fence that DRM should wait on before
1081 * proceeding with the Atomic Commit request and show the framebuffer for
1082 * the plane on the screen. The fence can be either a normal fence or a
1083 * merged one, the sync_file framework will handle both cases and use a
1084 * fence_array if a merged fence is received. Passing -1 here means no
1085 * fences to wait on.
1086 *
1087 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
1088 * it will only check if the Sync File is a valid one.
1089 *
1090 * On the driver side the fence is stored on the @fence parameter of
1091 * &struct drm_plane_state. Drivers which also support implicit fencing
1092 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
1093 * to make sure there's consistent behaviour between drivers in precedence
1094 * of implicit vs. explicit fencing.
1095 *
1096 * "OUT_FENCE_PTR”:
1097 * Use this property to pass a file descriptor pointer to DRM. Once the
1098 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
1099 * the file descriptor number of a Sync File. This Sync File contains the
1100 * CRTC fence that will be signaled when all framebuffers present on the
1101 * Atomic Commit * request for that given CRTC are scanned out on the
1102 * screen.
1103 *
1104 * The Atomic Commit request fails if a invalid pointer is passed. If the
1105 * Atomic Commit request fails for any other reason the out fence fd
1106 * returned will be -1. On a Atomic Commit with the
1107 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
1108 *
1109 * Note that out-fences don't have a special interface to drivers and are
1110 * internally represented by a &struct drm_pending_vblank_event in struct
1111 * &drm_crtc_state, which is also used by the nonblocking atomic commit
1112 * helpers and for the DRM event handling for existing userspace.
1113 */
1114
1115struct drm_out_fence_state {
1116 s32 __user *out_fence_ptr;
1117 struct sync_file *sync_file;
1118 int fd;
1119};
1120
1121static int setup_out_fence(struct drm_out_fence_state *fence_state,
1122 struct dma_fence *fence)
1123{
1124 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
1125 if (fence_state->fd < 0)
1126 return fence_state->fd;
1127
1128 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
1129 return -EFAULT;
1130
1131 fence_state->sync_file = sync_file_create(fence);
1132 if (!fence_state->sync_file)
1133 return -ENOMEM;
1134
1135 return 0;
1136}
1137
1138static int prepare_signaling(struct drm_device *dev,
1139 struct drm_atomic_state *state,
1140 struct drm_mode_atomic *arg,
1141 struct drm_file *file_priv,
1142 struct drm_out_fence_state **fence_state,
1143 unsigned int *num_fences)
1144{
1145 struct drm_crtc *crtc;
1146 struct drm_crtc_state *crtc_state;
1147 struct drm_connector *conn;
1148 struct drm_connector_state *conn_state;
1149 int i, c = 0, ret;
1150
1151 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
1152 return 0;
1153
1154 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1155 s32 __user *fence_ptr;
1156
1157 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
1158
1159 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
1160 struct drm_pending_vblank_event *e;
1161
1162 e = create_vblank_event(crtc, arg->user_data);
1163 if (!e)
1164 return -ENOMEM;
1165
1166 crtc_state->event = e;
1167 }
1168
1169 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1170 struct drm_pending_vblank_event *e = crtc_state->event;
1171
1172 if (!file_priv)
1173 continue;
1174
1175 ret = drm_event_reserve_init(dev, file_priv, &e->base,
1176 &e->event.base);
1177 if (ret) {
1178 kfree(e);
1179 crtc_state->event = NULL;
1180 return ret;
1181 }
1182 }
1183
1184 if (fence_ptr) {
1185 struct dma_fence *fence;
1186 struct drm_out_fence_state *f;
1187
1188 f = krealloc(*fence_state, sizeof(**fence_state) *
1189 (*num_fences + 1), GFP_KERNEL);
1190 if (!f)
1191 return -ENOMEM;
1192
1193 memset(&f[*num_fences], 0, sizeof(*f));
1194
1195 f[*num_fences].out_fence_ptr = fence_ptr;
1196 *fence_state = f;
1197
1198 fence = drm_crtc_create_fence(crtc);
1199 if (!fence)
1200 return -ENOMEM;
1201
1202 ret = setup_out_fence(&f[(*num_fences)++], fence);
1203 if (ret) {
1204 dma_fence_put(fence);
1205 return ret;
1206 }
1207
1208 crtc_state->event->base.fence = fence;
1209 }
1210
1211 c++;
1212 }
1213
1214 for_each_new_connector_in_state(state, conn, conn_state, i) {
1215 struct drm_writeback_connector *wb_conn;
1216 struct drm_out_fence_state *f;
1217 struct dma_fence *fence;
1218 s32 __user *fence_ptr;
1219
1220 if (!conn_state->writeback_job)
1221 continue;
1222
1223 fence_ptr = get_out_fence_for_connector(state, conn);
1224 if (!fence_ptr)
1225 continue;
1226
1227 f = krealloc(*fence_state, sizeof(**fence_state) *
1228 (*num_fences + 1), GFP_KERNEL);
1229 if (!f)
1230 return -ENOMEM;
1231
1232 memset(&f[*num_fences], 0, sizeof(*f));
1233
1234 f[*num_fences].out_fence_ptr = fence_ptr;
1235 *fence_state = f;
1236
1237 wb_conn = drm_connector_to_writeback(conn);
1238 fence = drm_writeback_get_out_fence(wb_conn);
1239 if (!fence)
1240 return -ENOMEM;
1241
1242 ret = setup_out_fence(&f[(*num_fences)++], fence);
1243 if (ret) {
1244 dma_fence_put(fence);
1245 return ret;
1246 }
1247
1248 conn_state->writeback_job->out_fence = fence;
1249 }
1250
1251 /*
1252 * Having this flag means user mode pends on event which will never
1253 * reach due to lack of at least one CRTC for signaling
1254 */
1255 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1256 return -EINVAL;
1257
1258 return 0;
1259}
1260
1261static void complete_signaling(struct drm_device *dev,
1262 struct drm_atomic_state *state,
1263 struct drm_out_fence_state *fence_state,
1264 unsigned int num_fences,
1265 bool install_fds)
1266{
1267 struct drm_crtc *crtc;
1268 struct drm_crtc_state *crtc_state;
1269 int i;
1270
1271 if (install_fds) {
1272 for (i = 0; i < num_fences; i++)
1273 fd_install(fence_state[i].fd,
1274 fence_state[i].sync_file->file);
1275
1276 kfree(fence_state);
1277 return;
1278 }
1279
1280 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1281 struct drm_pending_vblank_event *event = crtc_state->event;
1282 /*
1283 * Free the allocated event. drm_atomic_helper_setup_commit
1284 * can allocate an event too, so only free it if it's ours
1285 * to prevent a double free in drm_atomic_state_clear.
1286 */
1287 if (event && (event->base.fence || event->base.file_priv)) {
1288 drm_event_cancel_free(dev, &event->base);
1289 crtc_state->event = NULL;
1290 }
1291 }
1292
1293 if (!fence_state)
1294 return;
1295
1296 for (i = 0; i < num_fences; i++) {
1297 if (fence_state[i].sync_file)
1298 fput(fence_state[i].sync_file->file);
1299 if (fence_state[i].fd >= 0)
1300 put_unused_fd(fence_state[i].fd);
1301
1302 /* If this fails log error to the user */
1303 if (fence_state[i].out_fence_ptr &&
1304 put_user(-1, fence_state[i].out_fence_ptr))
1305 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n");
1306 }
1307
1308 kfree(fence_state);
1309}
1310
1311int drm_mode_atomic_ioctl(struct drm_device *dev,
1312 void *data, struct drm_file *file_priv)
1313{
1314 struct drm_mode_atomic *arg = data;
1315 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1316 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1317 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1318 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1319 unsigned int copied_objs, copied_props;
1320 struct drm_atomic_state *state;
1321 struct drm_modeset_acquire_ctx ctx;
1322 struct drm_out_fence_state *fence_state;
1323 int ret = 0;
1324 unsigned int i, j, num_fences;
1325 struct drm_printer p = drm_info_printer(dev->dev);
1326
1327 /* disallow for drivers not supporting atomic: */
1328 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1329 return -EOPNOTSUPP;
1330
1331 /* disallow for userspace that has not enabled atomic cap (even
1332 * though this may be a bit overkill, since legacy userspace
1333 * wouldn't know how to call this ioctl)
1334 */
1335 if (!file_priv->atomic) {
1336 drm_dbg_atomic(dev,
1337 "commit failed: atomic cap not enabled\n");
1338 return -EINVAL;
1339 }
1340
1341 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) {
1342 drm_dbg_atomic(dev, "commit failed: invalid flag\n");
1343 return -EINVAL;
1344 }
1345
1346 if (arg->reserved) {
1347 drm_dbg_atomic(dev, "commit failed: reserved field set\n");
1348 return -EINVAL;
1349 }
1350
1351 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) {
1352 drm_dbg_atomic(dev,
1353 "commit failed: invalid flag DRM_MODE_PAGE_FLIP_ASYNC\n");
1354 return -EINVAL;
1355 }
1356
1357 /* can't test and expect an event at the same time. */
1358 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1359 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) {
1360 drm_dbg_atomic(dev,
1361 "commit failed: page-flip event requested with test-only commit\n");
1362 return -EINVAL;
1363 }
1364
1365 state = drm_atomic_state_alloc(dev);
1366 if (!state)
1367 return -ENOMEM;
1368
1369 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1370 state->acquire_ctx = &ctx;
1371 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1372
1373retry:
1374 copied_objs = 0;
1375 copied_props = 0;
1376 fence_state = NULL;
1377 num_fences = 0;
1378
1379 for (i = 0; i < arg->count_objs; i++) {
1380 uint32_t obj_id, count_props;
1381 struct drm_mode_object *obj;
1382
1383 if (get_user(obj_id, objs_ptr + copied_objs)) {
1384 ret = -EFAULT;
1385 goto out;
1386 }
1387
1388 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
1389 if (!obj) {
1390 ret = -ENOENT;
1391 goto out;
1392 }
1393
1394 if (!obj->properties) {
1395 drm_mode_object_put(obj);
1396 ret = -ENOENT;
1397 goto out;
1398 }
1399
1400 if (get_user(count_props, count_props_ptr + copied_objs)) {
1401 drm_mode_object_put(obj);
1402 ret = -EFAULT;
1403 goto out;
1404 }
1405
1406 copied_objs++;
1407
1408 for (j = 0; j < count_props; j++) {
1409 uint32_t prop_id;
1410 uint64_t prop_value;
1411 struct drm_property *prop;
1412
1413 if (get_user(prop_id, props_ptr + copied_props)) {
1414 drm_mode_object_put(obj);
1415 ret = -EFAULT;
1416 goto out;
1417 }
1418
1419 prop = drm_mode_obj_find_prop_id(obj, prop_id);
1420 if (!prop) {
1421 drm_mode_object_put(obj);
1422 ret = -ENOENT;
1423 goto out;
1424 }
1425
1426 if (copy_from_user(&prop_value,
1427 prop_values_ptr + copied_props,
1428 sizeof(prop_value))) {
1429 drm_mode_object_put(obj);
1430 ret = -EFAULT;
1431 goto out;
1432 }
1433
1434 ret = drm_atomic_set_property(state, file_priv,
1435 obj, prop, prop_value);
1436 if (ret) {
1437 drm_mode_object_put(obj);
1438 goto out;
1439 }
1440
1441 copied_props++;
1442 }
1443
1444 drm_mode_object_put(obj);
1445 }
1446
1447 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state,
1448 &num_fences);
1449 if (ret)
1450 goto out;
1451
1452 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1453 ret = drm_atomic_check_only(state);
1454 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1455 ret = drm_atomic_nonblocking_commit(state);
1456 } else {
1457 if (drm_debug_enabled(DRM_UT_STATE))
1458 drm_atomic_print_new_state(state, &p);
1459
1460 ret = drm_atomic_commit(state);
1461 }
1462
1463out:
1464 complete_signaling(dev, state, fence_state, num_fences, !ret);
1465
1466 if (ret == -EDEADLK) {
1467 drm_atomic_state_clear(state);
1468 ret = drm_modeset_backoff(&ctx);
1469 if (!ret)
1470 goto retry;
1471 }
1472
1473 drm_atomic_state_put(state);
1474
1475 drm_modeset_drop_locks(&ctx);
1476 drm_modeset_acquire_fini(&ctx);
1477
1478 return ret;
1479}