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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_framebuffer.h>
33#include <drm/drm_print.h>
34#include <drm/drm_drv.h>
35#include <drm/drm_writeback.h>
36#include <drm/drm_vblank.h>
37
38#include <linux/dma-fence.h>
39#include <linux/uaccess.h>
40#include <linux/sync_file.h>
41#include <linux/file.h>
42
43#include "drm_crtc_internal.h"
44
45/**
46 * DOC: overview
47 *
48 * This file contains the marshalling and demarshalling glue for the atomic UAPI
49 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and
50 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and
51 * drivers which have special needs to construct their own atomic updates, e.g.
52 * for load detect or similar.
53 */
54
55/**
56 * drm_atomic_set_mode_for_crtc - set mode for CRTC
57 * @state: the CRTC whose incoming state to update
58 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
59 *
60 * Set a mode (originating from the kernel) on the desired CRTC state and update
61 * the enable property.
62 *
63 * RETURNS:
64 * Zero on success, error code on failure. Cannot return -EDEADLK.
65 */
66int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
67 const struct drm_display_mode *mode)
68{
69 struct drm_crtc *crtc = state->crtc;
70 struct drm_mode_modeinfo umode;
71
72 /* Early return for no change. */
73 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
74 return 0;
75
76 drm_property_blob_put(state->mode_blob);
77 state->mode_blob = NULL;
78
79 if (mode) {
80 struct drm_property_blob *blob;
81
82 drm_mode_convert_to_umode(&umode, mode);
83 blob = drm_property_create_blob(crtc->dev,
84 sizeof(umode), &umode);
85 if (IS_ERR(blob))
86 return PTR_ERR(blob);
87
88 drm_mode_copy(&state->mode, mode);
89
90 state->mode_blob = blob;
91 state->enable = true;
92 drm_dbg_atomic(crtc->dev,
93 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
94 mode->name, crtc->base.id, crtc->name, state);
95 } else {
96 memset(&state->mode, 0, sizeof(state->mode));
97 state->enable = false;
98 drm_dbg_atomic(crtc->dev,
99 "Set [NOMODE] for [CRTC:%d:%s] state %p\n",
100 crtc->base.id, crtc->name, state);
101 }
102
103 return 0;
104}
105EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
106
107/**
108 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
109 * @state: the CRTC whose incoming state to update
110 * @blob: pointer to blob property to use for mode
111 *
112 * Set a mode (originating from a blob property) on the desired CRTC state.
113 * This function will take a reference on the blob property for the CRTC state,
114 * and release the reference held on the state's existing mode property, if any
115 * was set.
116 *
117 * RETURNS:
118 * Zero on success, error code on failure. Cannot return -EDEADLK.
119 */
120int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
121 struct drm_property_blob *blob)
122{
123 struct drm_crtc *crtc = state->crtc;
124
125 if (blob == state->mode_blob)
126 return 0;
127
128 drm_property_blob_put(state->mode_blob);
129 state->mode_blob = NULL;
130
131 memset(&state->mode, 0, sizeof(state->mode));
132
133 if (blob) {
134 int ret;
135
136 if (blob->length != sizeof(struct drm_mode_modeinfo)) {
137 drm_dbg_atomic(crtc->dev,
138 "[CRTC:%d:%s] bad mode blob length: %zu\n",
139 crtc->base.id, crtc->name,
140 blob->length);
141 return -EINVAL;
142 }
143
144 ret = drm_mode_convert_umode(crtc->dev,
145 &state->mode, blob->data);
146 if (ret) {
147 drm_dbg_atomic(crtc->dev,
148 "[CRTC:%d:%s] invalid mode (%s, %pe): " DRM_MODE_FMT "\n",
149 crtc->base.id, crtc->name,
150 drm_get_mode_status_name(state->mode.status),
151 ERR_PTR(ret), DRM_MODE_ARG(&state->mode));
152 return -EINVAL;
153 }
154
155 state->mode_blob = drm_property_blob_get(blob);
156 state->enable = true;
157 drm_dbg_atomic(crtc->dev,
158 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
159 state->mode.name, crtc->base.id, crtc->name,
160 state);
161 } else {
162 state->enable = false;
163 drm_dbg_atomic(crtc->dev,
164 "Set [NOMODE] for [CRTC:%d:%s] state %p\n",
165 crtc->base.id, crtc->name, state);
166 }
167
168 return 0;
169}
170EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
171
172/**
173 * drm_atomic_set_crtc_for_plane - set CRTC for plane
174 * @plane_state: the plane whose incoming state to update
175 * @crtc: CRTC to use for the plane
176 *
177 * Changing the assigned CRTC for a plane requires us to grab the lock and state
178 * for the new CRTC, as needed. This function takes care of all these details
179 * besides updating the pointer in the state object itself.
180 *
181 * Returns:
182 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
183 * then the w/w mutex code has detected a deadlock and the entire atomic
184 * sequence must be restarted. All other errors are fatal.
185 */
186int
187drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
188 struct drm_crtc *crtc)
189{
190 struct drm_plane *plane = plane_state->plane;
191 struct drm_crtc_state *crtc_state;
192 /* Nothing to do for same crtc*/
193 if (plane_state->crtc == crtc)
194 return 0;
195 if (plane_state->crtc) {
196 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
197 plane_state->crtc);
198 if (WARN_ON(IS_ERR(crtc_state)))
199 return PTR_ERR(crtc_state);
200
201 crtc_state->plane_mask &= ~drm_plane_mask(plane);
202 }
203
204 plane_state->crtc = crtc;
205
206 if (crtc) {
207 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
208 crtc);
209 if (IS_ERR(crtc_state))
210 return PTR_ERR(crtc_state);
211 crtc_state->plane_mask |= drm_plane_mask(plane);
212 }
213
214 if (crtc)
215 drm_dbg_atomic(plane->dev,
216 "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n",
217 plane->base.id, plane->name, plane_state,
218 crtc->base.id, crtc->name);
219 else
220 drm_dbg_atomic(plane->dev,
221 "Link [PLANE:%d:%s] state %p to [NOCRTC]\n",
222 plane->base.id, plane->name, plane_state);
223
224 return 0;
225}
226EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
227
228/**
229 * drm_atomic_set_fb_for_plane - set framebuffer for plane
230 * @plane_state: atomic state object for the plane
231 * @fb: fb to use for the plane
232 *
233 * Changing the assigned framebuffer for a plane requires us to grab a reference
234 * to the new fb and drop the reference to the old fb, if there is one. This
235 * function takes care of all these details besides updating the pointer in the
236 * state object itself.
237 */
238void
239drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
240 struct drm_framebuffer *fb)
241{
242 struct drm_plane *plane = plane_state->plane;
243
244 if (fb)
245 drm_dbg_atomic(plane->dev,
246 "Set [FB:%d] for [PLANE:%d:%s] state %p\n",
247 fb->base.id, plane->base.id, plane->name,
248 plane_state);
249 else
250 drm_dbg_atomic(plane->dev,
251 "Set [NOFB] for [PLANE:%d:%s] state %p\n",
252 plane->base.id, plane->name, plane_state);
253
254 drm_framebuffer_assign(&plane_state->fb, fb);
255}
256EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
257
258/**
259 * drm_atomic_set_crtc_for_connector - set CRTC for connector
260 * @conn_state: atomic state object for the connector
261 * @crtc: CRTC to use for the connector
262 *
263 * Changing the assigned CRTC for a connector requires us to grab the lock and
264 * state for the new CRTC, as needed. This function takes care of all these
265 * details besides updating the pointer in the state object itself.
266 *
267 * Returns:
268 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
269 * then the w/w mutex code has detected a deadlock and the entire atomic
270 * sequence must be restarted. All other errors are fatal.
271 */
272int
273drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
274 struct drm_crtc *crtc)
275{
276 struct drm_connector *connector = conn_state->connector;
277 struct drm_crtc_state *crtc_state;
278
279 if (conn_state->crtc == crtc)
280 return 0;
281
282 if (conn_state->crtc) {
283 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
284 conn_state->crtc);
285
286 crtc_state->connector_mask &=
287 ~drm_connector_mask(conn_state->connector);
288
289 drm_connector_put(conn_state->connector);
290 conn_state->crtc = NULL;
291 }
292
293 if (crtc) {
294 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
295 if (IS_ERR(crtc_state))
296 return PTR_ERR(crtc_state);
297
298 crtc_state->connector_mask |=
299 drm_connector_mask(conn_state->connector);
300
301 drm_connector_get(conn_state->connector);
302 conn_state->crtc = crtc;
303
304 drm_dbg_atomic(connector->dev,
305 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n",
306 connector->base.id, connector->name,
307 conn_state, crtc->base.id, crtc->name);
308 } else {
309 drm_dbg_atomic(connector->dev,
310 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n",
311 connector->base.id, connector->name,
312 conn_state);
313 }
314
315 return 0;
316}
317EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
318
319static void set_out_fence_for_crtc(struct drm_atomic_state *state,
320 struct drm_crtc *crtc, s32 __user *fence_ptr)
321{
322 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
323}
324
325static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
326 struct drm_crtc *crtc)
327{
328 s32 __user *fence_ptr;
329
330 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
331 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
332
333 return fence_ptr;
334}
335
336static int set_out_fence_for_connector(struct drm_atomic_state *state,
337 struct drm_connector *connector,
338 s32 __user *fence_ptr)
339{
340 unsigned int index = drm_connector_index(connector);
341
342 if (!fence_ptr)
343 return 0;
344
345 if (put_user(-1, fence_ptr))
346 return -EFAULT;
347
348 state->connectors[index].out_fence_ptr = fence_ptr;
349
350 return 0;
351}
352
353static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state,
354 struct drm_connector *connector)
355{
356 unsigned int index = drm_connector_index(connector);
357 s32 __user *fence_ptr;
358
359 fence_ptr = state->connectors[index].out_fence_ptr;
360 state->connectors[index].out_fence_ptr = NULL;
361
362 return fence_ptr;
363}
364
365static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
366 struct drm_crtc_state *state, struct drm_property *property,
367 uint64_t val)
368{
369 struct drm_device *dev = crtc->dev;
370 struct drm_mode_config *config = &dev->mode_config;
371 bool replaced = false;
372 int ret;
373
374 if (property == config->prop_active)
375 state->active = val;
376 else if (property == config->prop_mode_id) {
377 struct drm_property_blob *mode =
378 drm_property_lookup_blob(dev, val);
379 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
380 drm_property_blob_put(mode);
381 return ret;
382 } else if (property == config->prop_vrr_enabled) {
383 state->vrr_enabled = val;
384 } else if (property == config->degamma_lut_property) {
385 ret = drm_property_replace_blob_from_id(dev,
386 &state->degamma_lut,
387 val,
388 -1, sizeof(struct drm_color_lut),
389 &replaced);
390 state->color_mgmt_changed |= replaced;
391 return ret;
392 } else if (property == config->ctm_property) {
393 ret = drm_property_replace_blob_from_id(dev,
394 &state->ctm,
395 val,
396 sizeof(struct drm_color_ctm), -1,
397 &replaced);
398 state->color_mgmt_changed |= replaced;
399 return ret;
400 } else if (property == config->gamma_lut_property) {
401 ret = drm_property_replace_blob_from_id(dev,
402 &state->gamma_lut,
403 val,
404 -1, sizeof(struct drm_color_lut),
405 &replaced);
406 state->color_mgmt_changed |= replaced;
407 return ret;
408 } else if (property == config->prop_out_fence_ptr) {
409 s32 __user *fence_ptr = u64_to_user_ptr(val);
410
411 if (!fence_ptr)
412 return 0;
413
414 if (put_user(-1, fence_ptr))
415 return -EFAULT;
416
417 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
418 } else if (property == crtc->scaling_filter_property) {
419 state->scaling_filter = val;
420 } else if (crtc->funcs->atomic_set_property) {
421 return crtc->funcs->atomic_set_property(crtc, state, property, val);
422 } else {
423 drm_dbg_atomic(crtc->dev,
424 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n",
425 crtc->base.id, crtc->name,
426 property->base.id, property->name);
427 return -EINVAL;
428 }
429
430 return 0;
431}
432
433static int
434drm_atomic_crtc_get_property(struct drm_crtc *crtc,
435 const struct drm_crtc_state *state,
436 struct drm_property *property, uint64_t *val)
437{
438 struct drm_device *dev = crtc->dev;
439 struct drm_mode_config *config = &dev->mode_config;
440
441 if (property == config->prop_active)
442 *val = drm_atomic_crtc_effectively_active(state);
443 else if (property == config->prop_mode_id)
444 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
445 else if (property == config->prop_vrr_enabled)
446 *val = state->vrr_enabled;
447 else if (property == config->degamma_lut_property)
448 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
449 else if (property == config->ctm_property)
450 *val = (state->ctm) ? state->ctm->base.id : 0;
451 else if (property == config->gamma_lut_property)
452 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
453 else if (property == config->prop_out_fence_ptr)
454 *val = 0;
455 else if (property == crtc->scaling_filter_property)
456 *val = state->scaling_filter;
457 else if (crtc->funcs->atomic_get_property)
458 return crtc->funcs->atomic_get_property(crtc, state, property, val);
459 else {
460 drm_dbg_atomic(dev,
461 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n",
462 crtc->base.id, crtc->name,
463 property->base.id, property->name);
464 return -EINVAL;
465 }
466
467 return 0;
468}
469
470static int drm_atomic_plane_set_property(struct drm_plane *plane,
471 struct drm_plane_state *state, struct drm_file *file_priv,
472 struct drm_property *property, uint64_t val)
473{
474 struct drm_device *dev = plane->dev;
475 struct drm_mode_config *config = &dev->mode_config;
476 bool replaced = false;
477 int ret;
478
479 if (property == config->prop_fb_id) {
480 struct drm_framebuffer *fb;
481
482 fb = drm_framebuffer_lookup(dev, file_priv, val);
483 drm_atomic_set_fb_for_plane(state, fb);
484 if (fb)
485 drm_framebuffer_put(fb);
486 } else if (property == config->prop_in_fence_fd) {
487 if (state->fence)
488 return -EINVAL;
489
490 if (U642I64(val) == -1)
491 return 0;
492
493 state->fence = sync_file_get_fence(val);
494 if (!state->fence)
495 return -EINVAL;
496
497 } else if (property == config->prop_crtc_id) {
498 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
499
500 if (val && !crtc) {
501 drm_dbg_atomic(dev,
502 "[PROP:%d:%s] cannot find CRTC with ID %llu\n",
503 property->base.id, property->name, val);
504 return -EACCES;
505 }
506 return drm_atomic_set_crtc_for_plane(state, crtc);
507 } else if (property == config->prop_crtc_x) {
508 state->crtc_x = U642I64(val);
509 } else if (property == config->prop_crtc_y) {
510 state->crtc_y = U642I64(val);
511 } else if (property == config->prop_crtc_w) {
512 state->crtc_w = val;
513 } else if (property == config->prop_crtc_h) {
514 state->crtc_h = val;
515 } else if (property == config->prop_src_x) {
516 state->src_x = val;
517 } else if (property == config->prop_src_y) {
518 state->src_y = val;
519 } else if (property == config->prop_src_w) {
520 state->src_w = val;
521 } else if (property == config->prop_src_h) {
522 state->src_h = val;
523 } else if (property == plane->alpha_property) {
524 state->alpha = val;
525 } else if (property == plane->blend_mode_property) {
526 state->pixel_blend_mode = val;
527 } else if (property == plane->rotation_property) {
528 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {
529 drm_dbg_atomic(plane->dev,
530 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",
531 plane->base.id, plane->name, val);
532 return -EINVAL;
533 }
534 state->rotation = val;
535 } else if (property == plane->zpos_property) {
536 state->zpos = val;
537 } else if (property == plane->color_encoding_property) {
538 state->color_encoding = val;
539 } else if (property == plane->color_range_property) {
540 state->color_range = val;
541 } else if (property == config->prop_fb_damage_clips) {
542 ret = drm_property_replace_blob_from_id(dev,
543 &state->fb_damage_clips,
544 val,
545 -1,
546 sizeof(struct drm_mode_rect),
547 &replaced);
548 return ret;
549 } else if (property == plane->scaling_filter_property) {
550 state->scaling_filter = val;
551 } else if (plane->funcs->atomic_set_property) {
552 return plane->funcs->atomic_set_property(plane, state,
553 property, val);
554 } else if (property == plane->hotspot_x_property) {
555 if (plane->type != DRM_PLANE_TYPE_CURSOR) {
556 drm_dbg_atomic(plane->dev,
557 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n",
558 plane->base.id, plane->name, val);
559 return -EINVAL;
560 }
561 state->hotspot_x = val;
562 } else if (property == plane->hotspot_y_property) {
563 if (plane->type != DRM_PLANE_TYPE_CURSOR) {
564 drm_dbg_atomic(plane->dev,
565 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n",
566 plane->base.id, plane->name, val);
567 return -EINVAL;
568 }
569 state->hotspot_y = val;
570 } else {
571 drm_dbg_atomic(plane->dev,
572 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n",
573 plane->base.id, plane->name,
574 property->base.id, property->name);
575 return -EINVAL;
576 }
577
578 return 0;
579}
580
581static int
582drm_atomic_plane_get_property(struct drm_plane *plane,
583 const struct drm_plane_state *state,
584 struct drm_property *property, uint64_t *val)
585{
586 struct drm_device *dev = plane->dev;
587 struct drm_mode_config *config = &dev->mode_config;
588
589 if (property == config->prop_fb_id) {
590 *val = (state->fb) ? state->fb->base.id : 0;
591 } else if (property == config->prop_in_fence_fd) {
592 *val = -1;
593 } else if (property == config->prop_crtc_id) {
594 *val = (state->crtc) ? state->crtc->base.id : 0;
595 } else if (property == config->prop_crtc_x) {
596 *val = I642U64(state->crtc_x);
597 } else if (property == config->prop_crtc_y) {
598 *val = I642U64(state->crtc_y);
599 } else if (property == config->prop_crtc_w) {
600 *val = state->crtc_w;
601 } else if (property == config->prop_crtc_h) {
602 *val = state->crtc_h;
603 } else if (property == config->prop_src_x) {
604 *val = state->src_x;
605 } else if (property == config->prop_src_y) {
606 *val = state->src_y;
607 } else if (property == config->prop_src_w) {
608 *val = state->src_w;
609 } else if (property == config->prop_src_h) {
610 *val = state->src_h;
611 } else if (property == plane->alpha_property) {
612 *val = state->alpha;
613 } else if (property == plane->blend_mode_property) {
614 *val = state->pixel_blend_mode;
615 } else if (property == plane->rotation_property) {
616 *val = state->rotation;
617 } else if (property == plane->zpos_property) {
618 *val = state->zpos;
619 } else if (property == plane->color_encoding_property) {
620 *val = state->color_encoding;
621 } else if (property == plane->color_range_property) {
622 *val = state->color_range;
623 } else if (property == config->prop_fb_damage_clips) {
624 *val = (state->fb_damage_clips) ?
625 state->fb_damage_clips->base.id : 0;
626 } else if (property == plane->scaling_filter_property) {
627 *val = state->scaling_filter;
628 } else if (plane->funcs->atomic_get_property) {
629 return plane->funcs->atomic_get_property(plane, state, property, val);
630 } else if (property == plane->hotspot_x_property) {
631 *val = state->hotspot_x;
632 } else if (property == plane->hotspot_y_property) {
633 *val = state->hotspot_y;
634 } else {
635 drm_dbg_atomic(dev,
636 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n",
637 plane->base.id, plane->name,
638 property->base.id, property->name);
639 return -EINVAL;
640 }
641
642 return 0;
643}
644
645static int drm_atomic_set_writeback_fb_for_connector(
646 struct drm_connector_state *conn_state,
647 struct drm_framebuffer *fb)
648{
649 int ret;
650 struct drm_connector *conn = conn_state->connector;
651
652 ret = drm_writeback_set_fb(conn_state, fb);
653 if (ret < 0)
654 return ret;
655
656 if (fb)
657 drm_dbg_atomic(conn->dev,
658 "Set [FB:%d] for connector state %p\n",
659 fb->base.id, conn_state);
660 else
661 drm_dbg_atomic(conn->dev,
662 "Set [NOFB] for connector state %p\n",
663 conn_state);
664
665 return 0;
666}
667
668static int drm_atomic_connector_set_property(struct drm_connector *connector,
669 struct drm_connector_state *state, struct drm_file *file_priv,
670 struct drm_property *property, uint64_t val)
671{
672 struct drm_device *dev = connector->dev;
673 struct drm_mode_config *config = &dev->mode_config;
674 bool replaced = false;
675 int ret;
676
677 if (property == config->prop_crtc_id) {
678 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
679
680 if (val && !crtc) {
681 drm_dbg_atomic(dev,
682 "[PROP:%d:%s] cannot find CRTC with ID %llu\n",
683 property->base.id, property->name, val);
684 return -EACCES;
685 }
686 return drm_atomic_set_crtc_for_connector(state, crtc);
687 } else if (property == config->dpms_property) {
688 /* setting DPMS property requires special handling, which
689 * is done in legacy setprop path for us. Disallow (for
690 * now?) atomic writes to DPMS property:
691 */
692 drm_dbg_atomic(dev,
693 "legacy [PROP:%d:%s] can only be set via legacy uAPI\n",
694 property->base.id, property->name);
695 return -EINVAL;
696 } else if (property == config->tv_select_subconnector_property) {
697 state->tv.select_subconnector = val;
698 } else if (property == config->tv_subconnector_property) {
699 state->tv.subconnector = val;
700 } else if (property == config->tv_left_margin_property) {
701 state->tv.margins.left = val;
702 } else if (property == config->tv_right_margin_property) {
703 state->tv.margins.right = val;
704 } else if (property == config->tv_top_margin_property) {
705 state->tv.margins.top = val;
706 } else if (property == config->tv_bottom_margin_property) {
707 state->tv.margins.bottom = val;
708 } else if (property == config->legacy_tv_mode_property) {
709 state->tv.legacy_mode = val;
710 } else if (property == config->tv_mode_property) {
711 state->tv.mode = val;
712 } else if (property == config->tv_brightness_property) {
713 state->tv.brightness = val;
714 } else if (property == config->tv_contrast_property) {
715 state->tv.contrast = val;
716 } else if (property == config->tv_flicker_reduction_property) {
717 state->tv.flicker_reduction = val;
718 } else if (property == config->tv_overscan_property) {
719 state->tv.overscan = val;
720 } else if (property == config->tv_saturation_property) {
721 state->tv.saturation = val;
722 } else if (property == config->tv_hue_property) {
723 state->tv.hue = val;
724 } else if (property == config->link_status_property) {
725 /* Never downgrade from GOOD to BAD on userspace's request here,
726 * only hw issues can do that.
727 *
728 * For an atomic property the userspace doesn't need to be able
729 * to understand all the properties, but needs to be able to
730 * restore the state it wants on VT switch. So if the userspace
731 * tries to change the link_status from GOOD to BAD, driver
732 * silently rejects it and returns a 0. This prevents userspace
733 * from accidentally breaking the display when it restores the
734 * state.
735 */
736 if (state->link_status != DRM_LINK_STATUS_GOOD)
737 state->link_status = val;
738 } else if (property == config->hdr_output_metadata_property) {
739 ret = drm_property_replace_blob_from_id(dev,
740 &state->hdr_output_metadata,
741 val,
742 sizeof(struct hdr_output_metadata), -1,
743 &replaced);
744 return ret;
745 } else if (property == config->aspect_ratio_property) {
746 state->picture_aspect_ratio = val;
747 } else if (property == config->content_type_property) {
748 state->content_type = val;
749 } else if (property == connector->scaling_mode_property) {
750 state->scaling_mode = val;
751 } else if (property == config->content_protection_property) {
752 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
753 drm_dbg_kms(dev, "only drivers can set CP Enabled\n");
754 return -EINVAL;
755 }
756 state->content_protection = val;
757 } else if (property == config->hdcp_content_type_property) {
758 state->hdcp_content_type = val;
759 } else if (property == connector->colorspace_property) {
760 state->colorspace = val;
761 } else if (property == config->writeback_fb_id_property) {
762 struct drm_framebuffer *fb;
763 int ret;
764
765 fb = drm_framebuffer_lookup(dev, file_priv, val);
766 ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
767 if (fb)
768 drm_framebuffer_put(fb);
769 return ret;
770 } else if (property == config->writeback_out_fence_ptr_property) {
771 s32 __user *fence_ptr = u64_to_user_ptr(val);
772
773 return set_out_fence_for_connector(state->state, connector,
774 fence_ptr);
775 } else if (property == connector->max_bpc_property) {
776 state->max_requested_bpc = val;
777 } else if (property == connector->privacy_screen_sw_state_property) {
778 state->privacy_screen_sw_state = val;
779 } else if (property == connector->broadcast_rgb_property) {
780 state->hdmi.broadcast_rgb = val;
781 } else if (connector->funcs->atomic_set_property) {
782 return connector->funcs->atomic_set_property(connector,
783 state, property, val);
784 } else {
785 drm_dbg_atomic(connector->dev,
786 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n",
787 connector->base.id, connector->name,
788 property->base.id, property->name);
789 return -EINVAL;
790 }
791
792 return 0;
793}
794
795static int
796drm_atomic_connector_get_property(struct drm_connector *connector,
797 const struct drm_connector_state *state,
798 struct drm_property *property, uint64_t *val)
799{
800 struct drm_device *dev = connector->dev;
801 struct drm_mode_config *config = &dev->mode_config;
802
803 if (property == config->prop_crtc_id) {
804 *val = (state->crtc) ? state->crtc->base.id : 0;
805 } else if (property == config->dpms_property) {
806 if (state->crtc && state->crtc->state->self_refresh_active)
807 *val = DRM_MODE_DPMS_ON;
808 else
809 *val = connector->dpms;
810 } else if (property == config->tv_select_subconnector_property) {
811 *val = state->tv.select_subconnector;
812 } else if (property == config->tv_subconnector_property) {
813 *val = state->tv.subconnector;
814 } else if (property == config->tv_left_margin_property) {
815 *val = state->tv.margins.left;
816 } else if (property == config->tv_right_margin_property) {
817 *val = state->tv.margins.right;
818 } else if (property == config->tv_top_margin_property) {
819 *val = state->tv.margins.top;
820 } else if (property == config->tv_bottom_margin_property) {
821 *val = state->tv.margins.bottom;
822 } else if (property == config->legacy_tv_mode_property) {
823 *val = state->tv.legacy_mode;
824 } else if (property == config->tv_mode_property) {
825 *val = state->tv.mode;
826 } else if (property == config->tv_brightness_property) {
827 *val = state->tv.brightness;
828 } else if (property == config->tv_contrast_property) {
829 *val = state->tv.contrast;
830 } else if (property == config->tv_flicker_reduction_property) {
831 *val = state->tv.flicker_reduction;
832 } else if (property == config->tv_overscan_property) {
833 *val = state->tv.overscan;
834 } else if (property == config->tv_saturation_property) {
835 *val = state->tv.saturation;
836 } else if (property == config->tv_hue_property) {
837 *val = state->tv.hue;
838 } else if (property == config->link_status_property) {
839 *val = state->link_status;
840 } else if (property == config->aspect_ratio_property) {
841 *val = state->picture_aspect_ratio;
842 } else if (property == config->content_type_property) {
843 *val = state->content_type;
844 } else if (property == connector->colorspace_property) {
845 *val = state->colorspace;
846 } else if (property == connector->scaling_mode_property) {
847 *val = state->scaling_mode;
848 } else if (property == config->hdr_output_metadata_property) {
849 *val = state->hdr_output_metadata ?
850 state->hdr_output_metadata->base.id : 0;
851 } else if (property == config->content_protection_property) {
852 *val = state->content_protection;
853 } else if (property == config->hdcp_content_type_property) {
854 *val = state->hdcp_content_type;
855 } else if (property == config->writeback_fb_id_property) {
856 /* Writeback framebuffer is one-shot, write and forget */
857 *val = 0;
858 } else if (property == config->writeback_out_fence_ptr_property) {
859 *val = 0;
860 } else if (property == connector->max_bpc_property) {
861 *val = state->max_requested_bpc;
862 } else if (property == connector->privacy_screen_sw_state_property) {
863 *val = state->privacy_screen_sw_state;
864 } else if (property == connector->broadcast_rgb_property) {
865 *val = state->hdmi.broadcast_rgb;
866 } else if (connector->funcs->atomic_get_property) {
867 return connector->funcs->atomic_get_property(connector,
868 state, property, val);
869 } else {
870 drm_dbg_atomic(dev,
871 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n",
872 connector->base.id, connector->name,
873 property->base.id, property->name);
874 return -EINVAL;
875 }
876
877 return 0;
878}
879
880int drm_atomic_get_property(struct drm_mode_object *obj,
881 struct drm_property *property, uint64_t *val)
882{
883 struct drm_device *dev = property->dev;
884 int ret;
885
886 switch (obj->type) {
887 case DRM_MODE_OBJECT_CONNECTOR: {
888 struct drm_connector *connector = obj_to_connector(obj);
889
890 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
891 ret = drm_atomic_connector_get_property(connector,
892 connector->state, property, val);
893 break;
894 }
895 case DRM_MODE_OBJECT_CRTC: {
896 struct drm_crtc *crtc = obj_to_crtc(obj);
897
898 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
899 ret = drm_atomic_crtc_get_property(crtc,
900 crtc->state, property, val);
901 break;
902 }
903 case DRM_MODE_OBJECT_PLANE: {
904 struct drm_plane *plane = obj_to_plane(obj);
905
906 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
907 ret = drm_atomic_plane_get_property(plane,
908 plane->state, property, val);
909 break;
910 }
911 default:
912 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id);
913 ret = -EINVAL;
914 break;
915 }
916
917 return ret;
918}
919
920/*
921 * The big monster ioctl
922 */
923
924static struct drm_pending_vblank_event *create_vblank_event(
925 struct drm_crtc *crtc, uint64_t user_data)
926{
927 struct drm_pending_vblank_event *e = NULL;
928
929 e = kzalloc(sizeof *e, GFP_KERNEL);
930 if (!e)
931 return NULL;
932
933 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
934 e->event.base.length = sizeof(e->event);
935 e->event.vbl.crtc_id = crtc->base.id;
936 e->event.vbl.user_data = user_data;
937
938 return e;
939}
940
941int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
942 struct drm_connector *connector,
943 int mode)
944{
945 struct drm_connector *tmp_connector;
946 struct drm_connector_state *new_conn_state;
947 struct drm_crtc *crtc;
948 struct drm_crtc_state *crtc_state;
949 int i, ret, old_mode = connector->dpms;
950 bool active = false;
951
952 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
953 state->acquire_ctx);
954 if (ret)
955 return ret;
956
957 if (mode != DRM_MODE_DPMS_ON)
958 mode = DRM_MODE_DPMS_OFF;
959 connector->dpms = mode;
960
961 crtc = connector->state->crtc;
962 if (!crtc)
963 goto out;
964 ret = drm_atomic_add_affected_connectors(state, crtc);
965 if (ret)
966 goto out;
967
968 crtc_state = drm_atomic_get_crtc_state(state, crtc);
969 if (IS_ERR(crtc_state)) {
970 ret = PTR_ERR(crtc_state);
971 goto out;
972 }
973
974 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
975 if (new_conn_state->crtc != crtc)
976 continue;
977 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
978 active = true;
979 break;
980 }
981 }
982
983 crtc_state->active = active;
984 ret = drm_atomic_commit(state);
985out:
986 if (ret != 0)
987 connector->dpms = old_mode;
988 return ret;
989}
990
991static int drm_atomic_check_prop_changes(int ret, uint64_t old_val, uint64_t prop_value,
992 struct drm_property *prop)
993{
994 if (ret != 0 || old_val != prop_value) {
995 drm_dbg_atomic(prop->dev,
996 "[PROP:%d:%s] No prop can be changed during async flip\n",
997 prop->base.id, prop->name);
998 return -EINVAL;
999 }
1000
1001 return 0;
1002}
1003
1004int drm_atomic_set_property(struct drm_atomic_state *state,
1005 struct drm_file *file_priv,
1006 struct drm_mode_object *obj,
1007 struct drm_property *prop,
1008 u64 prop_value,
1009 bool async_flip)
1010{
1011 struct drm_mode_object *ref;
1012 u64 old_val;
1013 int ret;
1014
1015 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1016 return -EINVAL;
1017
1018 switch (obj->type) {
1019 case DRM_MODE_OBJECT_CONNECTOR: {
1020 struct drm_connector *connector = obj_to_connector(obj);
1021 struct drm_connector_state *connector_state;
1022
1023 connector_state = drm_atomic_get_connector_state(state, connector);
1024 if (IS_ERR(connector_state)) {
1025 ret = PTR_ERR(connector_state);
1026 break;
1027 }
1028
1029 if (async_flip) {
1030 ret = drm_atomic_connector_get_property(connector, connector_state,
1031 prop, &old_val);
1032 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);
1033 break;
1034 }
1035
1036 ret = drm_atomic_connector_set_property(connector,
1037 connector_state, file_priv,
1038 prop, prop_value);
1039 break;
1040 }
1041 case DRM_MODE_OBJECT_CRTC: {
1042 struct drm_crtc *crtc = obj_to_crtc(obj);
1043 struct drm_crtc_state *crtc_state;
1044
1045 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1046 if (IS_ERR(crtc_state)) {
1047 ret = PTR_ERR(crtc_state);
1048 break;
1049 }
1050
1051 if (async_flip) {
1052 ret = drm_atomic_crtc_get_property(crtc, crtc_state,
1053 prop, &old_val);
1054 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);
1055 break;
1056 }
1057
1058 ret = drm_atomic_crtc_set_property(crtc,
1059 crtc_state, prop, prop_value);
1060 break;
1061 }
1062 case DRM_MODE_OBJECT_PLANE: {
1063 struct drm_plane *plane = obj_to_plane(obj);
1064 struct drm_plane_state *plane_state;
1065 struct drm_mode_config *config = &plane->dev->mode_config;
1066
1067 plane_state = drm_atomic_get_plane_state(state, plane);
1068 if (IS_ERR(plane_state)) {
1069 ret = PTR_ERR(plane_state);
1070 break;
1071 }
1072
1073 if (async_flip &&
1074 (plane_state->plane->type != DRM_PLANE_TYPE_PRIMARY ||
1075 (prop != config->prop_fb_id &&
1076 prop != config->prop_in_fence_fd &&
1077 prop != config->prop_fb_damage_clips))) {
1078 ret = drm_atomic_plane_get_property(plane, plane_state,
1079 prop, &old_val);
1080 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);
1081 break;
1082 }
1083
1084 ret = drm_atomic_plane_set_property(plane,
1085 plane_state, file_priv,
1086 prop, prop_value);
1087 break;
1088 }
1089 default:
1090 drm_dbg_atomic(prop->dev, "[OBJECT:%d] has no properties\n", obj->id);
1091 ret = -EINVAL;
1092 break;
1093 }
1094
1095 drm_property_change_valid_put(prop, ref);
1096 return ret;
1097}
1098
1099/**
1100 * DOC: explicit fencing properties
1101 *
1102 * Explicit fencing allows userspace to control the buffer synchronization
1103 * between devices. A Fence or a group of fences are transferred to/from
1104 * userspace using Sync File fds and there are two DRM properties for that.
1105 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
1106 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
1107 *
1108 * As a contrast, with implicit fencing the kernel keeps track of any
1109 * ongoing rendering, and automatically ensures that the atomic update waits
1110 * for any pending rendering to complete. This is usually tracked in &struct
1111 * dma_resv which can also contain mandatory kernel fences. Implicit syncing
1112 * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit
1113 * fencing is what Android wants.
1114 *
1115 * "IN_FENCE_FD”:
1116 * Use this property to pass a fence that DRM should wait on before
1117 * proceeding with the Atomic Commit request and show the framebuffer for
1118 * the plane on the screen. The fence can be either a normal fence or a
1119 * merged one, the sync_file framework will handle both cases and use a
1120 * fence_array if a merged fence is received. Passing -1 here means no
1121 * fences to wait on.
1122 *
1123 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
1124 * it will only check if the Sync File is a valid one.
1125 *
1126 * On the driver side the fence is stored on the @fence parameter of
1127 * &struct drm_plane_state. Drivers which also support implicit fencing
1128 * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(),
1129 * to make sure there's consistent behaviour between drivers in precedence
1130 * of implicit vs. explicit fencing.
1131 *
1132 * "OUT_FENCE_PTR”:
1133 * Use this property to pass a file descriptor pointer to DRM. Once the
1134 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
1135 * the file descriptor number of a Sync File. This Sync File contains the
1136 * CRTC fence that will be signaled when all framebuffers present on the
1137 * Atomic Commit * request for that given CRTC are scanned out on the
1138 * screen.
1139 *
1140 * The Atomic Commit request fails if a invalid pointer is passed. If the
1141 * Atomic Commit request fails for any other reason the out fence fd
1142 * returned will be -1. On a Atomic Commit with the
1143 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
1144 *
1145 * Note that out-fences don't have a special interface to drivers and are
1146 * internally represented by a &struct drm_pending_vblank_event in struct
1147 * &drm_crtc_state, which is also used by the nonblocking atomic commit
1148 * helpers and for the DRM event handling for existing userspace.
1149 */
1150
1151struct drm_out_fence_state {
1152 s32 __user *out_fence_ptr;
1153 struct sync_file *sync_file;
1154 int fd;
1155};
1156
1157static int setup_out_fence(struct drm_out_fence_state *fence_state,
1158 struct dma_fence *fence)
1159{
1160 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
1161 if (fence_state->fd < 0)
1162 return fence_state->fd;
1163
1164 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
1165 return -EFAULT;
1166
1167 fence_state->sync_file = sync_file_create(fence);
1168 if (!fence_state->sync_file)
1169 return -ENOMEM;
1170
1171 return 0;
1172}
1173
1174static int prepare_signaling(struct drm_device *dev,
1175 struct drm_atomic_state *state,
1176 struct drm_mode_atomic *arg,
1177 struct drm_file *file_priv,
1178 struct drm_out_fence_state **fence_state,
1179 unsigned int *num_fences)
1180{
1181 struct drm_crtc *crtc;
1182 struct drm_crtc_state *crtc_state;
1183 struct drm_connector *conn;
1184 struct drm_connector_state *conn_state;
1185 int i, c = 0, ret;
1186
1187 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
1188 return 0;
1189
1190 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1191 s32 __user *fence_ptr;
1192
1193 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
1194
1195 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
1196 struct drm_pending_vblank_event *e;
1197
1198 e = create_vblank_event(crtc, arg->user_data);
1199 if (!e)
1200 return -ENOMEM;
1201
1202 crtc_state->event = e;
1203 }
1204
1205 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1206 struct drm_pending_vblank_event *e = crtc_state->event;
1207
1208 if (!file_priv)
1209 continue;
1210
1211 ret = drm_event_reserve_init(dev, file_priv, &e->base,
1212 &e->event.base);
1213 if (ret) {
1214 kfree(e);
1215 crtc_state->event = NULL;
1216 return ret;
1217 }
1218 }
1219
1220 if (fence_ptr) {
1221 struct dma_fence *fence;
1222 struct drm_out_fence_state *f;
1223
1224 f = krealloc(*fence_state, sizeof(**fence_state) *
1225 (*num_fences + 1), GFP_KERNEL);
1226 if (!f)
1227 return -ENOMEM;
1228
1229 memset(&f[*num_fences], 0, sizeof(*f));
1230
1231 f[*num_fences].out_fence_ptr = fence_ptr;
1232 *fence_state = f;
1233
1234 fence = drm_crtc_create_fence(crtc);
1235 if (!fence)
1236 return -ENOMEM;
1237
1238 ret = setup_out_fence(&f[(*num_fences)++], fence);
1239 if (ret) {
1240 dma_fence_put(fence);
1241 return ret;
1242 }
1243
1244 crtc_state->event->base.fence = fence;
1245 }
1246
1247 c++;
1248 }
1249
1250 for_each_new_connector_in_state(state, conn, conn_state, i) {
1251 struct drm_writeback_connector *wb_conn;
1252 struct drm_out_fence_state *f;
1253 struct dma_fence *fence;
1254 s32 __user *fence_ptr;
1255
1256 if (!conn_state->writeback_job)
1257 continue;
1258
1259 fence_ptr = get_out_fence_for_connector(state, conn);
1260 if (!fence_ptr)
1261 continue;
1262
1263 f = krealloc(*fence_state, sizeof(**fence_state) *
1264 (*num_fences + 1), GFP_KERNEL);
1265 if (!f)
1266 return -ENOMEM;
1267
1268 memset(&f[*num_fences], 0, sizeof(*f));
1269
1270 f[*num_fences].out_fence_ptr = fence_ptr;
1271 *fence_state = f;
1272
1273 wb_conn = drm_connector_to_writeback(conn);
1274 fence = drm_writeback_get_out_fence(wb_conn);
1275 if (!fence)
1276 return -ENOMEM;
1277
1278 ret = setup_out_fence(&f[(*num_fences)++], fence);
1279 if (ret) {
1280 dma_fence_put(fence);
1281 return ret;
1282 }
1283
1284 conn_state->writeback_job->out_fence = fence;
1285 }
1286
1287 /*
1288 * Having this flag means user mode pends on event which will never
1289 * reach due to lack of at least one CRTC for signaling
1290 */
1291 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) {
1292 drm_dbg_atomic(dev, "need at least one CRTC for DRM_MODE_PAGE_FLIP_EVENT");
1293 return -EINVAL;
1294 }
1295
1296 return 0;
1297}
1298
1299static void complete_signaling(struct drm_device *dev,
1300 struct drm_atomic_state *state,
1301 struct drm_out_fence_state *fence_state,
1302 unsigned int num_fences,
1303 bool install_fds)
1304{
1305 struct drm_crtc *crtc;
1306 struct drm_crtc_state *crtc_state;
1307 int i;
1308
1309 if (install_fds) {
1310 for (i = 0; i < num_fences; i++)
1311 fd_install(fence_state[i].fd,
1312 fence_state[i].sync_file->file);
1313
1314 kfree(fence_state);
1315 return;
1316 }
1317
1318 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1319 struct drm_pending_vblank_event *event = crtc_state->event;
1320 /*
1321 * Free the allocated event. drm_atomic_helper_setup_commit
1322 * can allocate an event too, so only free it if it's ours
1323 * to prevent a double free in drm_atomic_state_clear.
1324 */
1325 if (event && (event->base.fence || event->base.file_priv)) {
1326 drm_event_cancel_free(dev, &event->base);
1327 crtc_state->event = NULL;
1328 }
1329 }
1330
1331 if (!fence_state)
1332 return;
1333
1334 for (i = 0; i < num_fences; i++) {
1335 if (fence_state[i].sync_file)
1336 fput(fence_state[i].sync_file->file);
1337 if (fence_state[i].fd >= 0)
1338 put_unused_fd(fence_state[i].fd);
1339
1340 /* If this fails log error to the user */
1341 if (fence_state[i].out_fence_ptr &&
1342 put_user(-1, fence_state[i].out_fence_ptr))
1343 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n");
1344 }
1345
1346 kfree(fence_state);
1347}
1348
1349static void
1350set_async_flip(struct drm_atomic_state *state)
1351{
1352 struct drm_crtc *crtc;
1353 struct drm_crtc_state *crtc_state;
1354 int i;
1355
1356 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1357 crtc_state->async_flip = true;
1358 }
1359}
1360
1361int drm_mode_atomic_ioctl(struct drm_device *dev,
1362 void *data, struct drm_file *file_priv)
1363{
1364 struct drm_mode_atomic *arg = data;
1365 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1366 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1367 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1368 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1369 unsigned int copied_objs, copied_props;
1370 struct drm_atomic_state *state;
1371 struct drm_modeset_acquire_ctx ctx;
1372 struct drm_out_fence_state *fence_state;
1373 int ret = 0;
1374 unsigned int i, j, num_fences;
1375 bool async_flip = false;
1376
1377 /* disallow for drivers not supporting atomic: */
1378 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1379 return -EOPNOTSUPP;
1380
1381 /* disallow for userspace that has not enabled atomic cap (even
1382 * though this may be a bit overkill, since legacy userspace
1383 * wouldn't know how to call this ioctl)
1384 */
1385 if (!file_priv->atomic) {
1386 drm_dbg_atomic(dev,
1387 "commit failed: atomic cap not enabled\n");
1388 return -EINVAL;
1389 }
1390
1391 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) {
1392 drm_dbg_atomic(dev, "commit failed: invalid flag\n");
1393 return -EINVAL;
1394 }
1395
1396 if (arg->reserved) {
1397 drm_dbg_atomic(dev, "commit failed: reserved field set\n");
1398 return -EINVAL;
1399 }
1400
1401 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) {
1402 if (!dev->mode_config.async_page_flip) {
1403 drm_dbg_atomic(dev,
1404 "commit failed: DRM_MODE_PAGE_FLIP_ASYNC not supported\n");
1405 return -EINVAL;
1406 }
1407
1408 async_flip = true;
1409 }
1410
1411 /* can't test and expect an event at the same time. */
1412 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1413 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) {
1414 drm_dbg_atomic(dev,
1415 "commit failed: page-flip event requested with test-only commit\n");
1416 return -EINVAL;
1417 }
1418
1419 state = drm_atomic_state_alloc(dev);
1420 if (!state)
1421 return -ENOMEM;
1422
1423 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1424 state->acquire_ctx = &ctx;
1425 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1426
1427retry:
1428 copied_objs = 0;
1429 copied_props = 0;
1430 fence_state = NULL;
1431 num_fences = 0;
1432
1433 for (i = 0; i < arg->count_objs; i++) {
1434 uint32_t obj_id, count_props;
1435 struct drm_mode_object *obj;
1436
1437 if (get_user(obj_id, objs_ptr + copied_objs)) {
1438 ret = -EFAULT;
1439 goto out;
1440 }
1441
1442 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
1443 if (!obj) {
1444 drm_dbg_atomic(dev, "cannot find object ID %d", obj_id);
1445 ret = -ENOENT;
1446 goto out;
1447 }
1448
1449 if (!obj->properties) {
1450 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties", obj_id);
1451 drm_mode_object_put(obj);
1452 ret = -ENOENT;
1453 goto out;
1454 }
1455
1456 if (get_user(count_props, count_props_ptr + copied_objs)) {
1457 drm_mode_object_put(obj);
1458 ret = -EFAULT;
1459 goto out;
1460 }
1461
1462 copied_objs++;
1463
1464 for (j = 0; j < count_props; j++) {
1465 uint32_t prop_id;
1466 uint64_t prop_value;
1467 struct drm_property *prop;
1468
1469 if (get_user(prop_id, props_ptr + copied_props)) {
1470 drm_mode_object_put(obj);
1471 ret = -EFAULT;
1472 goto out;
1473 }
1474
1475 prop = drm_mode_obj_find_prop_id(obj, prop_id);
1476 if (!prop) {
1477 drm_dbg_atomic(dev,
1478 "[OBJECT:%d] cannot find property ID %d",
1479 obj_id, prop_id);
1480 drm_mode_object_put(obj);
1481 ret = -ENOENT;
1482 goto out;
1483 }
1484
1485 if (copy_from_user(&prop_value,
1486 prop_values_ptr + copied_props,
1487 sizeof(prop_value))) {
1488 drm_mode_object_put(obj);
1489 ret = -EFAULT;
1490 goto out;
1491 }
1492
1493 ret = drm_atomic_set_property(state, file_priv, obj,
1494 prop, prop_value, async_flip);
1495 if (ret) {
1496 drm_mode_object_put(obj);
1497 goto out;
1498 }
1499
1500 copied_props++;
1501 }
1502
1503 drm_mode_object_put(obj);
1504 }
1505
1506 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state,
1507 &num_fences);
1508 if (ret)
1509 goto out;
1510
1511 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC)
1512 set_async_flip(state);
1513
1514 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1515 ret = drm_atomic_check_only(state);
1516 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1517 ret = drm_atomic_nonblocking_commit(state);
1518 } else {
1519 ret = drm_atomic_commit(state);
1520 }
1521
1522out:
1523 complete_signaling(dev, state, fence_state, num_fences, !ret);
1524
1525 if (ret == -EDEADLK) {
1526 drm_atomic_state_clear(state);
1527 ret = drm_modeset_backoff(&ctx);
1528 if (!ret)
1529 goto retry;
1530 }
1531
1532 drm_atomic_state_put(state);
1533
1534 drm_modeset_drop_locks(&ctx);
1535 drm_modeset_acquire_fini(&ctx);
1536
1537 return ret;
1538}
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}