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authorDave Airlie <airlied@redhat.com>2018-09-13 19:43:06 -0400
committerDave Airlie <airlied@redhat.com>2018-09-13 19:43:16 -0400
commit2dc7bad71cd310dc94d1c9907909324dd2b0618f (patch)
treea087555dd4b1588eeac02c1af5d8dde7b5bb15fa /drivers/gpu/drm/drm_atomic_uapi.c
parentb1c1566822ab489a945dfdafee651aa29de160c7 (diff)
parent169cc4c7a14e988985c8833ddec2f3e897de2c28 (diff)
Merge tag 'drm-misc-next-2018-09-13' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
drm-misc-next for 4.20: UAPI Changes: - Add host endian variants for the most common formats (Gerd) - Fail ADDFB2 for big-endian drivers that don't advertise BE quirk (Gerd) - clear smem_start in fbdev for drm drivers to avoid leaking fb addr (Daniel) Cross-subsystem Changes: Core Changes: - fix drm_mode_addfb() on big endian machines (Gerd) - add timeline point to syncobj find+replace (Chunming) - more drmP.h removal effort (Daniel) - split uapi portions of drm_atomic.c into drm_atomic_uapi.c (Daniel) Driver Changes: - bochs: Convert open-coded portions to use helpers (Peter) - vkms: Add cursor support (Haneen) - udmabuf: Lots of fixups (mostly cosmetic afaict) (Gerd) - qxl: Convert to use fbdev helper (Peter) Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Chunming Zhou <david1.zhou@amd.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Peter Wu <peter@lekensteyn.nl> Cc: Haneen Mohammed <hamohammed.sa@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com> From: Sean Paul <sean@poorly.run> Link: https://patchwork.freedesktop.org/patch/msgid/20180913130254.GA156437@art_vandelay
Diffstat (limited to 'drivers/gpu/drm/drm_atomic_uapi.c')
-rw-r--r--drivers/gpu/drm/drm_atomic_uapi.c1393
1 files changed, 1393 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
new file mode 100644
index 000000000000..26690a664ec6
--- /dev/null
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -0,0 +1,1393 @@
1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 * Copyright (C) 2018 Intel Corp.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Rob Clark <robdclark@gmail.com>
26 * Daniel Vetter <daniel.vetter@ffwll.ch>
27 */
28
29#include <drm/drm_atomic_uapi.h>
30#include <drm/drm_atomic.h>
31#include <drm/drm_print.h>
32#include <drm/drm_drv.h>
33#include <drm/drm_writeback.h>
34#include <drm/drm_vblank.h>
35
36#include <linux/dma-fence.h>
37#include <linux/uaccess.h>
38#include <linux/sync_file.h>
39#include <linux/file.h>
40
41#include "drm_crtc_internal.h"
42
43/**
44 * DOC: overview
45 *
46 * This file contains the marshalling and demarshalling glue for the atomic UAPI
47 * in all it's form: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and
48 * SET_PROPERTY IOCTls. Plus interface functions for compatibility helpers and
49 * drivers which have special needs to construct their own atomic updates, e.g.
50 * for load detect or similiar.
51 */
52
53/**
54 * drm_atomic_set_mode_for_crtc - set mode for CRTC
55 * @state: the CRTC whose incoming state to update
56 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
57 *
58 * Set a mode (originating from the kernel) on the desired CRTC state and update
59 * the enable property.
60 *
61 * RETURNS:
62 * Zero on success, error code on failure. Cannot return -EDEADLK.
63 */
64int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
65 const struct drm_display_mode *mode)
66{
67 struct drm_crtc *crtc = state->crtc;
68 struct drm_mode_modeinfo umode;
69
70 /* Early return for no change. */
71 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
72 return 0;
73
74 drm_property_blob_put(state->mode_blob);
75 state->mode_blob = NULL;
76
77 if (mode) {
78 drm_mode_convert_to_umode(&umode, mode);
79 state->mode_blob =
80 drm_property_create_blob(state->crtc->dev,
81 sizeof(umode),
82 &umode);
83 if (IS_ERR(state->mode_blob))
84 return PTR_ERR(state->mode_blob);
85
86 drm_mode_copy(&state->mode, mode);
87 state->enable = true;
88 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
89 mode->name, crtc->base.id, crtc->name, state);
90 } else {
91 memset(&state->mode, 0, sizeof(state->mode));
92 state->enable = false;
93 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
94 crtc->base.id, crtc->name, state);
95 }
96
97 return 0;
98}
99EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
100
101/**
102 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
103 * @state: the CRTC whose incoming state to update
104 * @blob: pointer to blob property to use for mode
105 *
106 * Set a mode (originating from a blob property) on the desired CRTC state.
107 * This function will take a reference on the blob property for the CRTC state,
108 * and release the reference held on the state's existing mode property, if any
109 * was set.
110 *
111 * RETURNS:
112 * Zero on success, error code on failure. Cannot return -EDEADLK.
113 */
114int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
115 struct drm_property_blob *blob)
116{
117 struct drm_crtc *crtc = state->crtc;
118
119 if (blob == state->mode_blob)
120 return 0;
121
122 drm_property_blob_put(state->mode_blob);
123 state->mode_blob = NULL;
124
125 memset(&state->mode, 0, sizeof(state->mode));
126
127 if (blob) {
128 int ret;
129
130 if (blob->length != sizeof(struct drm_mode_modeinfo)) {
131 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] bad mode blob length: %zu\n",
132 crtc->base.id, crtc->name,
133 blob->length);
134 return -EINVAL;
135 }
136
137 ret = drm_mode_convert_umode(crtc->dev,
138 &state->mode, blob->data);
139 if (ret) {
140 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n",
141 crtc->base.id, crtc->name,
142 ret, drm_get_mode_status_name(state->mode.status));
143 drm_mode_debug_printmodeline(&state->mode);
144 return -EINVAL;
145 }
146
147 state->mode_blob = drm_property_blob_get(blob);
148 state->enable = true;
149 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
150 state->mode.name, crtc->base.id, crtc->name,
151 state);
152 } else {
153 state->enable = false;
154 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
155 crtc->base.id, crtc->name, state);
156 }
157
158 return 0;
159}
160EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
161
162/**
163 * drm_atomic_set_crtc_for_plane - set crtc for plane
164 * @plane_state: the plane whose incoming state to update
165 * @crtc: crtc to use for the plane
166 *
167 * Changing the assigned crtc for a plane requires us to grab the lock and state
168 * for the new crtc, as needed. This function takes care of all these details
169 * besides updating the pointer in the state object itself.
170 *
171 * Returns:
172 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
173 * then the w/w mutex code has detected a deadlock and the entire atomic
174 * sequence must be restarted. All other errors are fatal.
175 */
176int
177drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
178 struct drm_crtc *crtc)
179{
180 struct drm_plane *plane = plane_state->plane;
181 struct drm_crtc_state *crtc_state;
182 /* Nothing to do for same crtc*/
183 if (plane_state->crtc == crtc)
184 return 0;
185 if (plane_state->crtc) {
186 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
187 plane_state->crtc);
188 if (WARN_ON(IS_ERR(crtc_state)))
189 return PTR_ERR(crtc_state);
190
191 crtc_state->plane_mask &= ~drm_plane_mask(plane);
192 }
193
194 plane_state->crtc = crtc;
195
196 if (crtc) {
197 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
198 crtc);
199 if (IS_ERR(crtc_state))
200 return PTR_ERR(crtc_state);
201 crtc_state->plane_mask |= drm_plane_mask(plane);
202 }
203
204 if (crtc)
205 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n",
206 plane->base.id, plane->name, plane_state,
207 crtc->base.id, crtc->name);
208 else
209 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [NOCRTC]\n",
210 plane->base.id, plane->name, plane_state);
211
212 return 0;
213}
214EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
215
216/**
217 * drm_atomic_set_fb_for_plane - set framebuffer for plane
218 * @plane_state: atomic state object for the plane
219 * @fb: fb to use for the plane
220 *
221 * Changing the assigned framebuffer for a plane requires us to grab a reference
222 * to the new fb and drop the reference to the old fb, if there is one. This
223 * function takes care of all these details besides updating the pointer in the
224 * state object itself.
225 */
226void
227drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
228 struct drm_framebuffer *fb)
229{
230 struct drm_plane *plane = plane_state->plane;
231
232 if (fb)
233 DRM_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n",
234 fb->base.id, plane->base.id, plane->name,
235 plane_state);
236 else
237 DRM_DEBUG_ATOMIC("Set [NOFB] for [PLANE:%d:%s] state %p\n",
238 plane->base.id, plane->name, plane_state);
239
240 drm_framebuffer_assign(&plane_state->fb, fb);
241}
242EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
243
244/**
245 * drm_atomic_set_fence_for_plane - set fence for plane
246 * @plane_state: atomic state object for the plane
247 * @fence: dma_fence to use for the plane
248 *
249 * Helper to setup the plane_state fence in case it is not set yet.
250 * By using this drivers doesn't need to worry if the user choose
251 * implicit or explicit fencing.
252 *
253 * This function will not set the fence to the state if it was set
254 * via explicit fencing interfaces on the atomic ioctl. In that case it will
255 * drop the reference to the fence as we are not storing it anywhere.
256 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
257 * with the received implicit fence. In both cases this function consumes a
258 * reference for @fence.
259 *
260 * This way explicit fencing can be used to overrule implicit fencing, which is
261 * important to make explicit fencing use-cases work: One example is using one
262 * buffer for 2 screens with different refresh rates. Implicit fencing will
263 * clamp rendering to the refresh rate of the slower screen, whereas explicit
264 * fence allows 2 independent render and display loops on a single buffer. If a
265 * driver allows obeys both implicit and explicit fences for plane updates, then
266 * it will break all the benefits of explicit fencing.
267 */
268void
269drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
270 struct dma_fence *fence)
271{
272 if (plane_state->fence) {
273 dma_fence_put(fence);
274 return;
275 }
276
277 plane_state->fence = fence;
278}
279EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
280
281/**
282 * drm_atomic_set_crtc_for_connector - set crtc for connector
283 * @conn_state: atomic state object for the connector
284 * @crtc: crtc to use for the connector
285 *
286 * Changing the assigned crtc for a connector requires us to grab the lock and
287 * state for the new crtc, as needed. This function takes care of all these
288 * details besides updating the pointer in the state object itself.
289 *
290 * Returns:
291 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
292 * then the w/w mutex code has detected a deadlock and the entire atomic
293 * sequence must be restarted. All other errors are fatal.
294 */
295int
296drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
297 struct drm_crtc *crtc)
298{
299 struct drm_connector *connector = conn_state->connector;
300 struct drm_crtc_state *crtc_state;
301
302 if (conn_state->crtc == crtc)
303 return 0;
304
305 if (conn_state->crtc) {
306 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
307 conn_state->crtc);
308
309 crtc_state->connector_mask &=
310 ~drm_connector_mask(conn_state->connector);
311
312 drm_connector_put(conn_state->connector);
313 conn_state->crtc = NULL;
314 }
315
316 if (crtc) {
317 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
318 if (IS_ERR(crtc_state))
319 return PTR_ERR(crtc_state);
320
321 crtc_state->connector_mask |=
322 drm_connector_mask(conn_state->connector);
323
324 drm_connector_get(conn_state->connector);
325 conn_state->crtc = crtc;
326
327 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n",
328 connector->base.id, connector->name,
329 conn_state, crtc->base.id, crtc->name);
330 } else {
331 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n",
332 connector->base.id, connector->name,
333 conn_state);
334 }
335
336 return 0;
337}
338EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
339
340static void set_out_fence_for_crtc(struct drm_atomic_state *state,
341 struct drm_crtc *crtc, s32 __user *fence_ptr)
342{
343 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
344}
345
346static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
347 struct drm_crtc *crtc)
348{
349 s32 __user *fence_ptr;
350
351 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
352 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
353
354 return fence_ptr;
355}
356
357static int set_out_fence_for_connector(struct drm_atomic_state *state,
358 struct drm_connector *connector,
359 s32 __user *fence_ptr)
360{
361 unsigned int index = drm_connector_index(connector);
362
363 if (!fence_ptr)
364 return 0;
365
366 if (put_user(-1, fence_ptr))
367 return -EFAULT;
368
369 state->connectors[index].out_fence_ptr = fence_ptr;
370
371 return 0;
372}
373
374static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state,
375 struct drm_connector *connector)
376{
377 unsigned int index = drm_connector_index(connector);
378 s32 __user *fence_ptr;
379
380 fence_ptr = state->connectors[index].out_fence_ptr;
381 state->connectors[index].out_fence_ptr = NULL;
382
383 return fence_ptr;
384}
385
386static int
387drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
388 struct drm_property_blob **blob,
389 uint64_t blob_id,
390 ssize_t expected_size,
391 ssize_t expected_elem_size,
392 bool *replaced)
393{
394 struct drm_property_blob *new_blob = NULL;
395
396 if (blob_id != 0) {
397 new_blob = drm_property_lookup_blob(dev, blob_id);
398 if (new_blob == NULL)
399 return -EINVAL;
400
401 if (expected_size > 0 &&
402 new_blob->length != expected_size) {
403 drm_property_blob_put(new_blob);
404 return -EINVAL;
405 }
406 if (expected_elem_size > 0 &&
407 new_blob->length % expected_elem_size != 0) {
408 drm_property_blob_put(new_blob);
409 return -EINVAL;
410 }
411 }
412
413 *replaced |= drm_property_replace_blob(blob, new_blob);
414 drm_property_blob_put(new_blob);
415
416 return 0;
417}
418
419static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
420 struct drm_crtc_state *state, struct drm_property *property,
421 uint64_t val)
422{
423 struct drm_device *dev = crtc->dev;
424 struct drm_mode_config *config = &dev->mode_config;
425 bool replaced = false;
426 int ret;
427
428 if (property == config->prop_active)
429 state->active = val;
430 else if (property == config->prop_mode_id) {
431 struct drm_property_blob *mode =
432 drm_property_lookup_blob(dev, val);
433 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
434 drm_property_blob_put(mode);
435 return ret;
436 } else if (property == config->degamma_lut_property) {
437 ret = drm_atomic_replace_property_blob_from_id(dev,
438 &state->degamma_lut,
439 val,
440 -1, sizeof(struct drm_color_lut),
441 &replaced);
442 state->color_mgmt_changed |= replaced;
443 return ret;
444 } else if (property == config->ctm_property) {
445 ret = drm_atomic_replace_property_blob_from_id(dev,
446 &state->ctm,
447 val,
448 sizeof(struct drm_color_ctm), -1,
449 &replaced);
450 state->color_mgmt_changed |= replaced;
451 return ret;
452 } else if (property == config->gamma_lut_property) {
453 ret = drm_atomic_replace_property_blob_from_id(dev,
454 &state->gamma_lut,
455 val,
456 -1, sizeof(struct drm_color_lut),
457 &replaced);
458 state->color_mgmt_changed |= replaced;
459 return ret;
460 } else if (property == config->prop_out_fence_ptr) {
461 s32 __user *fence_ptr = u64_to_user_ptr(val);
462
463 if (!fence_ptr)
464 return 0;
465
466 if (put_user(-1, fence_ptr))
467 return -EFAULT;
468
469 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
470 } else if (crtc->funcs->atomic_set_property) {
471 return crtc->funcs->atomic_set_property(crtc, state, property, val);
472 } else {
473 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
474 crtc->base.id, crtc->name,
475 property->base.id, property->name);
476 return -EINVAL;
477 }
478
479 return 0;
480}
481
482static int
483drm_atomic_crtc_get_property(struct drm_crtc *crtc,
484 const struct drm_crtc_state *state,
485 struct drm_property *property, uint64_t *val)
486{
487 struct drm_device *dev = crtc->dev;
488 struct drm_mode_config *config = &dev->mode_config;
489
490 if (property == config->prop_active)
491 *val = state->active;
492 else if (property == config->prop_mode_id)
493 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
494 else if (property == config->degamma_lut_property)
495 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
496 else if (property == config->ctm_property)
497 *val = (state->ctm) ? state->ctm->base.id : 0;
498 else if (property == config->gamma_lut_property)
499 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
500 else if (property == config->prop_out_fence_ptr)
501 *val = 0;
502 else if (crtc->funcs->atomic_get_property)
503 return crtc->funcs->atomic_get_property(crtc, state, property, val);
504 else
505 return -EINVAL;
506
507 return 0;
508}
509
510static int drm_atomic_plane_set_property(struct drm_plane *plane,
511 struct drm_plane_state *state, struct drm_property *property,
512 uint64_t val)
513{
514 struct drm_device *dev = plane->dev;
515 struct drm_mode_config *config = &dev->mode_config;
516
517 if (property == config->prop_fb_id) {
518 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
519 drm_atomic_set_fb_for_plane(state, fb);
520 if (fb)
521 drm_framebuffer_put(fb);
522 } else if (property == config->prop_in_fence_fd) {
523 if (state->fence)
524 return -EINVAL;
525
526 if (U642I64(val) == -1)
527 return 0;
528
529 state->fence = sync_file_get_fence(val);
530 if (!state->fence)
531 return -EINVAL;
532
533 } else if (property == config->prop_crtc_id) {
534 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
535 return drm_atomic_set_crtc_for_plane(state, crtc);
536 } else if (property == config->prop_crtc_x) {
537 state->crtc_x = U642I64(val);
538 } else if (property == config->prop_crtc_y) {
539 state->crtc_y = U642I64(val);
540 } else if (property == config->prop_crtc_w) {
541 state->crtc_w = val;
542 } else if (property == config->prop_crtc_h) {
543 state->crtc_h = val;
544 } else if (property == config->prop_src_x) {
545 state->src_x = val;
546 } else if (property == config->prop_src_y) {
547 state->src_y = val;
548 } else if (property == config->prop_src_w) {
549 state->src_w = val;
550 } else if (property == config->prop_src_h) {
551 state->src_h = val;
552 } else if (property == plane->alpha_property) {
553 state->alpha = val;
554 } else if (property == plane->blend_mode_property) {
555 state->pixel_blend_mode = val;
556 } else if (property == plane->rotation_property) {
557 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {
558 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",
559 plane->base.id, plane->name, val);
560 return -EINVAL;
561 }
562 state->rotation = val;
563 } else if (property == plane->zpos_property) {
564 state->zpos = val;
565 } else if (property == plane->color_encoding_property) {
566 state->color_encoding = val;
567 } else if (property == plane->color_range_property) {
568 state->color_range = val;
569 } else if (plane->funcs->atomic_set_property) {
570 return plane->funcs->atomic_set_property(plane, state,
571 property, val);
572 } else {
573 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n",
574 plane->base.id, plane->name,
575 property->base.id, property->name);
576 return -EINVAL;
577 }
578
579 return 0;
580}
581
582static int
583drm_atomic_plane_get_property(struct drm_plane *plane,
584 const struct drm_plane_state *state,
585 struct drm_property *property, uint64_t *val)
586{
587 struct drm_device *dev = plane->dev;
588 struct drm_mode_config *config = &dev->mode_config;
589
590 if (property == config->prop_fb_id) {
591 *val = (state->fb) ? state->fb->base.id : 0;
592 } else if (property == config->prop_in_fence_fd) {
593 *val = -1;
594 } else if (property == config->prop_crtc_id) {
595 *val = (state->crtc) ? state->crtc->base.id : 0;
596 } else if (property == config->prop_crtc_x) {
597 *val = I642U64(state->crtc_x);
598 } else if (property == config->prop_crtc_y) {
599 *val = I642U64(state->crtc_y);
600 } else if (property == config->prop_crtc_w) {
601 *val = state->crtc_w;
602 } else if (property == config->prop_crtc_h) {
603 *val = state->crtc_h;
604 } else if (property == config->prop_src_x) {
605 *val = state->src_x;
606 } else if (property == config->prop_src_y) {
607 *val = state->src_y;
608 } else if (property == config->prop_src_w) {
609 *val = state->src_w;
610 } else if (property == config->prop_src_h) {
611 *val = state->src_h;
612 } else if (property == plane->alpha_property) {
613 *val = state->alpha;
614 } else if (property == plane->blend_mode_property) {
615 *val = state->pixel_blend_mode;
616 } else if (property == plane->rotation_property) {
617 *val = state->rotation;
618 } else if (property == plane->zpos_property) {
619 *val = state->zpos;
620 } else if (property == plane->color_encoding_property) {
621 *val = state->color_encoding;
622 } else if (property == plane->color_range_property) {
623 *val = state->color_range;
624 } else if (plane->funcs->atomic_get_property) {
625 return plane->funcs->atomic_get_property(plane, state, property, val);
626 } else {
627 return -EINVAL;
628 }
629
630 return 0;
631}
632
633static struct drm_writeback_job *
634drm_atomic_get_writeback_job(struct drm_connector_state *conn_state)
635{
636 WARN_ON(conn_state->connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);
637
638 if (!conn_state->writeback_job)
639 conn_state->writeback_job =
640 kzalloc(sizeof(*conn_state->writeback_job), GFP_KERNEL);
641
642 return conn_state->writeback_job;
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 struct drm_writeback_job *job =
650 drm_atomic_get_writeback_job(conn_state);
651 if (!job)
652 return -ENOMEM;
653
654 drm_framebuffer_assign(&job->fb, fb);
655
656 if (fb)
657 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n",
658 fb->base.id, conn_state);
659 else
660 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n",
661 conn_state);
662
663 return 0;
664}
665
666static int drm_atomic_connector_set_property(struct drm_connector *connector,
667 struct drm_connector_state *state, struct drm_property *property,
668 uint64_t val)
669{
670 struct drm_device *dev = connector->dev;
671 struct drm_mode_config *config = &dev->mode_config;
672
673 if (property == config->prop_crtc_id) {
674 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
675 return drm_atomic_set_crtc_for_connector(state, crtc);
676 } else if (property == config->dpms_property) {
677 /* setting DPMS property requires special handling, which
678 * is done in legacy setprop path for us. Disallow (for
679 * now?) atomic writes to DPMS property:
680 */
681 return -EINVAL;
682 } else if (property == config->tv_select_subconnector_property) {
683 state->tv.subconnector = val;
684 } else if (property == config->tv_left_margin_property) {
685 state->tv.margins.left = val;
686 } else if (property == config->tv_right_margin_property) {
687 state->tv.margins.right = val;
688 } else if (property == config->tv_top_margin_property) {
689 state->tv.margins.top = val;
690 } else if (property == config->tv_bottom_margin_property) {
691 state->tv.margins.bottom = val;
692 } else if (property == config->tv_mode_property) {
693 state->tv.mode = val;
694 } else if (property == config->tv_brightness_property) {
695 state->tv.brightness = val;
696 } else if (property == config->tv_contrast_property) {
697 state->tv.contrast = val;
698 } else if (property == config->tv_flicker_reduction_property) {
699 state->tv.flicker_reduction = val;
700 } else if (property == config->tv_overscan_property) {
701 state->tv.overscan = val;
702 } else if (property == config->tv_saturation_property) {
703 state->tv.saturation = val;
704 } else if (property == config->tv_hue_property) {
705 state->tv.hue = val;
706 } else if (property == config->link_status_property) {
707 /* Never downgrade from GOOD to BAD on userspace's request here,
708 * only hw issues can do that.
709 *
710 * For an atomic property the userspace doesn't need to be able
711 * to understand all the properties, but needs to be able to
712 * restore the state it wants on VT switch. So if the userspace
713 * tries to change the link_status from GOOD to BAD, driver
714 * silently rejects it and returns a 0. This prevents userspace
715 * from accidently breaking the display when it restores the
716 * state.
717 */
718 if (state->link_status != DRM_LINK_STATUS_GOOD)
719 state->link_status = val;
720 } else if (property == config->aspect_ratio_property) {
721 state->picture_aspect_ratio = val;
722 } else if (property == config->content_type_property) {
723 state->content_type = val;
724 } else if (property == connector->scaling_mode_property) {
725 state->scaling_mode = val;
726 } else if (property == connector->content_protection_property) {
727 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
728 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
729 return -EINVAL;
730 }
731 state->content_protection = val;
732 } else if (property == config->writeback_fb_id_property) {
733 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
734 int ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
735 if (fb)
736 drm_framebuffer_put(fb);
737 return ret;
738 } else if (property == config->writeback_out_fence_ptr_property) {
739 s32 __user *fence_ptr = u64_to_user_ptr(val);
740
741 return set_out_fence_for_connector(state->state, connector,
742 fence_ptr);
743 } else if (connector->funcs->atomic_set_property) {
744 return connector->funcs->atomic_set_property(connector,
745 state, property, val);
746 } else {
747 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n",
748 connector->base.id, connector->name,
749 property->base.id, property->name);
750 return -EINVAL;
751 }
752
753 return 0;
754}
755
756static int
757drm_atomic_connector_get_property(struct drm_connector *connector,
758 const struct drm_connector_state *state,
759 struct drm_property *property, uint64_t *val)
760{
761 struct drm_device *dev = connector->dev;
762 struct drm_mode_config *config = &dev->mode_config;
763
764 if (property == config->prop_crtc_id) {
765 *val = (state->crtc) ? state->crtc->base.id : 0;
766 } else if (property == config->dpms_property) {
767 *val = connector->dpms;
768 } else if (property == config->tv_select_subconnector_property) {
769 *val = state->tv.subconnector;
770 } else if (property == config->tv_left_margin_property) {
771 *val = state->tv.margins.left;
772 } else if (property == config->tv_right_margin_property) {
773 *val = state->tv.margins.right;
774 } else if (property == config->tv_top_margin_property) {
775 *val = state->tv.margins.top;
776 } else if (property == config->tv_bottom_margin_property) {
777 *val = state->tv.margins.bottom;
778 } else if (property == config->tv_mode_property) {
779 *val = state->tv.mode;
780 } else if (property == config->tv_brightness_property) {
781 *val = state->tv.brightness;
782 } else if (property == config->tv_contrast_property) {
783 *val = state->tv.contrast;
784 } else if (property == config->tv_flicker_reduction_property) {
785 *val = state->tv.flicker_reduction;
786 } else if (property == config->tv_overscan_property) {
787 *val = state->tv.overscan;
788 } else if (property == config->tv_saturation_property) {
789 *val = state->tv.saturation;
790 } else if (property == config->tv_hue_property) {
791 *val = state->tv.hue;
792 } else if (property == config->link_status_property) {
793 *val = state->link_status;
794 } else if (property == config->aspect_ratio_property) {
795 *val = state->picture_aspect_ratio;
796 } else if (property == config->content_type_property) {
797 *val = state->content_type;
798 } else if (property == connector->scaling_mode_property) {
799 *val = state->scaling_mode;
800 } else if (property == connector->content_protection_property) {
801 *val = state->content_protection;
802 } else if (property == config->writeback_fb_id_property) {
803 /* Writeback framebuffer is one-shot, write and forget */
804 *val = 0;
805 } else if (property == config->writeback_out_fence_ptr_property) {
806 *val = 0;
807 } else if (connector->funcs->atomic_get_property) {
808 return connector->funcs->atomic_get_property(connector,
809 state, property, val);
810 } else {
811 return -EINVAL;
812 }
813
814 return 0;
815}
816
817int drm_atomic_get_property(struct drm_mode_object *obj,
818 struct drm_property *property, uint64_t *val)
819{
820 struct drm_device *dev = property->dev;
821 int ret;
822
823 switch (obj->type) {
824 case DRM_MODE_OBJECT_CONNECTOR: {
825 struct drm_connector *connector = obj_to_connector(obj);
826 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
827 ret = drm_atomic_connector_get_property(connector,
828 connector->state, property, val);
829 break;
830 }
831 case DRM_MODE_OBJECT_CRTC: {
832 struct drm_crtc *crtc = obj_to_crtc(obj);
833 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
834 ret = drm_atomic_crtc_get_property(crtc,
835 crtc->state, property, val);
836 break;
837 }
838 case DRM_MODE_OBJECT_PLANE: {
839 struct drm_plane *plane = obj_to_plane(obj);
840 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
841 ret = drm_atomic_plane_get_property(plane,
842 plane->state, property, val);
843 break;
844 }
845 default:
846 ret = -EINVAL;
847 break;
848 }
849
850 return ret;
851}
852
853/*
854 * The big monster ioctl
855 */
856
857static struct drm_pending_vblank_event *create_vblank_event(
858 struct drm_crtc *crtc, uint64_t user_data)
859{
860 struct drm_pending_vblank_event *e = NULL;
861
862 e = kzalloc(sizeof *e, GFP_KERNEL);
863 if (!e)
864 return NULL;
865
866 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
867 e->event.base.length = sizeof(e->event);
868 e->event.vbl.crtc_id = crtc->base.id;
869 e->event.vbl.user_data = user_data;
870
871 return e;
872}
873
874int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
875 struct drm_connector *connector,
876 int mode)
877{
878 struct drm_connector *tmp_connector;
879 struct drm_connector_state *new_conn_state;
880 struct drm_crtc *crtc;
881 struct drm_crtc_state *crtc_state;
882 int i, ret, old_mode = connector->dpms;
883 bool active = false;
884
885 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
886 state->acquire_ctx);
887 if (ret)
888 return ret;
889
890 if (mode != DRM_MODE_DPMS_ON)
891 mode = DRM_MODE_DPMS_OFF;
892 connector->dpms = mode;
893
894 crtc = connector->state->crtc;
895 if (!crtc)
896 goto out;
897 ret = drm_atomic_add_affected_connectors(state, crtc);
898 if (ret)
899 goto out;
900
901 crtc_state = drm_atomic_get_crtc_state(state, crtc);
902 if (IS_ERR(crtc_state)) {
903 ret = PTR_ERR(crtc_state);
904 goto out;
905 }
906
907 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
908 if (new_conn_state->crtc != crtc)
909 continue;
910 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
911 active = true;
912 break;
913 }
914 }
915
916 crtc_state->active = active;
917 ret = drm_atomic_commit(state);
918out:
919 if (ret != 0)
920 connector->dpms = old_mode;
921 return ret;
922}
923
924int drm_atomic_set_property(struct drm_atomic_state *state,
925 struct drm_mode_object *obj,
926 struct drm_property *prop,
927 uint64_t prop_value)
928{
929 struct drm_mode_object *ref;
930 int ret;
931
932 if (!drm_property_change_valid_get(prop, prop_value, &ref))
933 return -EINVAL;
934
935 switch (obj->type) {
936 case DRM_MODE_OBJECT_CONNECTOR: {
937 struct drm_connector *connector = obj_to_connector(obj);
938 struct drm_connector_state *connector_state;
939
940 connector_state = drm_atomic_get_connector_state(state, connector);
941 if (IS_ERR(connector_state)) {
942 ret = PTR_ERR(connector_state);
943 break;
944 }
945
946 ret = drm_atomic_connector_set_property(connector,
947 connector_state, prop, prop_value);
948 break;
949 }
950 case DRM_MODE_OBJECT_CRTC: {
951 struct drm_crtc *crtc = obj_to_crtc(obj);
952 struct drm_crtc_state *crtc_state;
953
954 crtc_state = drm_atomic_get_crtc_state(state, crtc);
955 if (IS_ERR(crtc_state)) {
956 ret = PTR_ERR(crtc_state);
957 break;
958 }
959
960 ret = drm_atomic_crtc_set_property(crtc,
961 crtc_state, prop, prop_value);
962 break;
963 }
964 case DRM_MODE_OBJECT_PLANE: {
965 struct drm_plane *plane = obj_to_plane(obj);
966 struct drm_plane_state *plane_state;
967
968 plane_state = drm_atomic_get_plane_state(state, plane);
969 if (IS_ERR(plane_state)) {
970 ret = PTR_ERR(plane_state);
971 break;
972 }
973
974 ret = drm_atomic_plane_set_property(plane,
975 plane_state, prop, prop_value);
976 break;
977 }
978 default:
979 ret = -EINVAL;
980 break;
981 }
982
983 drm_property_change_valid_put(prop, ref);
984 return ret;
985}
986
987/**
988 * DOC: explicit fencing properties
989 *
990 * Explicit fencing allows userspace to control the buffer synchronization
991 * between devices. A Fence or a group of fences are transfered to/from
992 * userspace using Sync File fds and there are two DRM properties for that.
993 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
994 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
995 *
996 * As a contrast, with implicit fencing the kernel keeps track of any
997 * ongoing rendering, and automatically ensures that the atomic update waits
998 * for any pending rendering to complete. For shared buffers represented with
999 * a &struct dma_buf this is tracked in &struct reservation_object.
1000 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
1001 * whereas explicit fencing is what Android wants.
1002 *
1003 * "IN_FENCE_FD”:
1004 * Use this property to pass a fence that DRM should wait on before
1005 * proceeding with the Atomic Commit request and show the framebuffer for
1006 * the plane on the screen. The fence can be either a normal fence or a
1007 * merged one, the sync_file framework will handle both cases and use a
1008 * fence_array if a merged fence is received. Passing -1 here means no
1009 * fences to wait on.
1010 *
1011 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
1012 * it will only check if the Sync File is a valid one.
1013 *
1014 * On the driver side the fence is stored on the @fence parameter of
1015 * &struct drm_plane_state. Drivers which also support implicit fencing
1016 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
1017 * to make sure there's consistent behaviour between drivers in precedence
1018 * of implicit vs. explicit fencing.
1019 *
1020 * "OUT_FENCE_PTR”:
1021 * Use this property to pass a file descriptor pointer to DRM. Once the
1022 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
1023 * the file descriptor number of a Sync File. This Sync File contains the
1024 * CRTC fence that will be signaled when all framebuffers present on the
1025 * Atomic Commit * request for that given CRTC are scanned out on the
1026 * screen.
1027 *
1028 * The Atomic Commit request fails if a invalid pointer is passed. If the
1029 * Atomic Commit request fails for any other reason the out fence fd
1030 * returned will be -1. On a Atomic Commit with the
1031 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
1032 *
1033 * Note that out-fences don't have a special interface to drivers and are
1034 * internally represented by a &struct drm_pending_vblank_event in struct
1035 * &drm_crtc_state, which is also used by the nonblocking atomic commit
1036 * helpers and for the DRM event handling for existing userspace.
1037 */
1038
1039struct drm_out_fence_state {
1040 s32 __user *out_fence_ptr;
1041 struct sync_file *sync_file;
1042 int fd;
1043};
1044
1045static int setup_out_fence(struct drm_out_fence_state *fence_state,
1046 struct dma_fence *fence)
1047{
1048 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
1049 if (fence_state->fd < 0)
1050 return fence_state->fd;
1051
1052 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
1053 return -EFAULT;
1054
1055 fence_state->sync_file = sync_file_create(fence);
1056 if (!fence_state->sync_file)
1057 return -ENOMEM;
1058
1059 return 0;
1060}
1061
1062static int prepare_signaling(struct drm_device *dev,
1063 struct drm_atomic_state *state,
1064 struct drm_mode_atomic *arg,
1065 struct drm_file *file_priv,
1066 struct drm_out_fence_state **fence_state,
1067 unsigned int *num_fences)
1068{
1069 struct drm_crtc *crtc;
1070 struct drm_crtc_state *crtc_state;
1071 struct drm_connector *conn;
1072 struct drm_connector_state *conn_state;
1073 int i, c = 0, ret;
1074
1075 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
1076 return 0;
1077
1078 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1079 s32 __user *fence_ptr;
1080
1081 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
1082
1083 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
1084 struct drm_pending_vblank_event *e;
1085
1086 e = create_vblank_event(crtc, arg->user_data);
1087 if (!e)
1088 return -ENOMEM;
1089
1090 crtc_state->event = e;
1091 }
1092
1093 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1094 struct drm_pending_vblank_event *e = crtc_state->event;
1095
1096 if (!file_priv)
1097 continue;
1098
1099 ret = drm_event_reserve_init(dev, file_priv, &e->base,
1100 &e->event.base);
1101 if (ret) {
1102 kfree(e);
1103 crtc_state->event = NULL;
1104 return ret;
1105 }
1106 }
1107
1108 if (fence_ptr) {
1109 struct dma_fence *fence;
1110 struct drm_out_fence_state *f;
1111
1112 f = krealloc(*fence_state, sizeof(**fence_state) *
1113 (*num_fences + 1), GFP_KERNEL);
1114 if (!f)
1115 return -ENOMEM;
1116
1117 memset(&f[*num_fences], 0, sizeof(*f));
1118
1119 f[*num_fences].out_fence_ptr = fence_ptr;
1120 *fence_state = f;
1121
1122 fence = drm_crtc_create_fence(crtc);
1123 if (!fence)
1124 return -ENOMEM;
1125
1126 ret = setup_out_fence(&f[(*num_fences)++], fence);
1127 if (ret) {
1128 dma_fence_put(fence);
1129 return ret;
1130 }
1131
1132 crtc_state->event->base.fence = fence;
1133 }
1134
1135 c++;
1136 }
1137
1138 for_each_new_connector_in_state(state, conn, conn_state, i) {
1139 struct drm_writeback_connector *wb_conn;
1140 struct drm_writeback_job *job;
1141 struct drm_out_fence_state *f;
1142 struct dma_fence *fence;
1143 s32 __user *fence_ptr;
1144
1145 fence_ptr = get_out_fence_for_connector(state, conn);
1146 if (!fence_ptr)
1147 continue;
1148
1149 job = drm_atomic_get_writeback_job(conn_state);
1150 if (!job)
1151 return -ENOMEM;
1152
1153 f = krealloc(*fence_state, sizeof(**fence_state) *
1154 (*num_fences + 1), GFP_KERNEL);
1155 if (!f)
1156 return -ENOMEM;
1157
1158 memset(&f[*num_fences], 0, sizeof(*f));
1159
1160 f[*num_fences].out_fence_ptr = fence_ptr;
1161 *fence_state = f;
1162
1163 wb_conn = drm_connector_to_writeback(conn);
1164 fence = drm_writeback_get_out_fence(wb_conn);
1165 if (!fence)
1166 return -ENOMEM;
1167
1168 ret = setup_out_fence(&f[(*num_fences)++], fence);
1169 if (ret) {
1170 dma_fence_put(fence);
1171 return ret;
1172 }
1173
1174 job->out_fence = fence;
1175 }
1176
1177 /*
1178 * Having this flag means user mode pends on event which will never
1179 * reach due to lack of at least one CRTC for signaling
1180 */
1181 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1182 return -EINVAL;
1183
1184 return 0;
1185}
1186
1187static void complete_signaling(struct drm_device *dev,
1188 struct drm_atomic_state *state,
1189 struct drm_out_fence_state *fence_state,
1190 unsigned int num_fences,
1191 bool install_fds)
1192{
1193 struct drm_crtc *crtc;
1194 struct drm_crtc_state *crtc_state;
1195 int i;
1196
1197 if (install_fds) {
1198 for (i = 0; i < num_fences; i++)
1199 fd_install(fence_state[i].fd,
1200 fence_state[i].sync_file->file);
1201
1202 kfree(fence_state);
1203 return;
1204 }
1205
1206 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1207 struct drm_pending_vblank_event *event = crtc_state->event;
1208 /*
1209 * Free the allocated event. drm_atomic_helper_setup_commit
1210 * can allocate an event too, so only free it if it's ours
1211 * to prevent a double free in drm_atomic_state_clear.
1212 */
1213 if (event && (event->base.fence || event->base.file_priv)) {
1214 drm_event_cancel_free(dev, &event->base);
1215 crtc_state->event = NULL;
1216 }
1217 }
1218
1219 if (!fence_state)
1220 return;
1221
1222 for (i = 0; i < num_fences; i++) {
1223 if (fence_state[i].sync_file)
1224 fput(fence_state[i].sync_file->file);
1225 if (fence_state[i].fd >= 0)
1226 put_unused_fd(fence_state[i].fd);
1227
1228 /* If this fails log error to the user */
1229 if (fence_state[i].out_fence_ptr &&
1230 put_user(-1, fence_state[i].out_fence_ptr))
1231 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
1232 }
1233
1234 kfree(fence_state);
1235}
1236
1237int drm_mode_atomic_ioctl(struct drm_device *dev,
1238 void *data, struct drm_file *file_priv)
1239{
1240 struct drm_mode_atomic *arg = data;
1241 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1242 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1243 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1244 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1245 unsigned int copied_objs, copied_props;
1246 struct drm_atomic_state *state;
1247 struct drm_modeset_acquire_ctx ctx;
1248 struct drm_out_fence_state *fence_state;
1249 int ret = 0;
1250 unsigned int i, j, num_fences;
1251
1252 /* disallow for drivers not supporting atomic: */
1253 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1254 return -EINVAL;
1255
1256 /* disallow for userspace that has not enabled atomic cap (even
1257 * though this may be a bit overkill, since legacy userspace
1258 * wouldn't know how to call this ioctl)
1259 */
1260 if (!file_priv->atomic)
1261 return -EINVAL;
1262
1263 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
1264 return -EINVAL;
1265
1266 if (arg->reserved)
1267 return -EINVAL;
1268
1269 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
1270 !dev->mode_config.async_page_flip)
1271 return -EINVAL;
1272
1273 /* can't test and expect an event at the same time. */
1274 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1275 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1276 return -EINVAL;
1277
1278 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1279
1280 state = drm_atomic_state_alloc(dev);
1281 if (!state)
1282 return -ENOMEM;
1283
1284 state->acquire_ctx = &ctx;
1285 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1286
1287retry:
1288 copied_objs = 0;
1289 copied_props = 0;
1290 fence_state = NULL;
1291 num_fences = 0;
1292
1293 for (i = 0; i < arg->count_objs; i++) {
1294 uint32_t obj_id, count_props;
1295 struct drm_mode_object *obj;
1296
1297 if (get_user(obj_id, objs_ptr + copied_objs)) {
1298 ret = -EFAULT;
1299 goto out;
1300 }
1301
1302 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
1303 if (!obj) {
1304 ret = -ENOENT;
1305 goto out;
1306 }
1307
1308 if (!obj->properties) {
1309 drm_mode_object_put(obj);
1310 ret = -ENOENT;
1311 goto out;
1312 }
1313
1314 if (get_user(count_props, count_props_ptr + copied_objs)) {
1315 drm_mode_object_put(obj);
1316 ret = -EFAULT;
1317 goto out;
1318 }
1319
1320 copied_objs++;
1321
1322 for (j = 0; j < count_props; j++) {
1323 uint32_t prop_id;
1324 uint64_t prop_value;
1325 struct drm_property *prop;
1326
1327 if (get_user(prop_id, props_ptr + copied_props)) {
1328 drm_mode_object_put(obj);
1329 ret = -EFAULT;
1330 goto out;
1331 }
1332
1333 prop = drm_mode_obj_find_prop_id(obj, prop_id);
1334 if (!prop) {
1335 drm_mode_object_put(obj);
1336 ret = -ENOENT;
1337 goto out;
1338 }
1339
1340 if (copy_from_user(&prop_value,
1341 prop_values_ptr + copied_props,
1342 sizeof(prop_value))) {
1343 drm_mode_object_put(obj);
1344 ret = -EFAULT;
1345 goto out;
1346 }
1347
1348 ret = drm_atomic_set_property(state, obj, prop,
1349 prop_value);
1350 if (ret) {
1351 drm_mode_object_put(obj);
1352 goto out;
1353 }
1354
1355 copied_props++;
1356 }
1357
1358 drm_mode_object_put(obj);
1359 }
1360
1361 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state,
1362 &num_fences);
1363 if (ret)
1364 goto out;
1365
1366 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1367 ret = drm_atomic_check_only(state);
1368 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1369 ret = drm_atomic_nonblocking_commit(state);
1370 } else {
1371 if (unlikely(drm_debug & DRM_UT_STATE))
1372 drm_atomic_print_state(state);
1373
1374 ret = drm_atomic_commit(state);
1375 }
1376
1377out:
1378 complete_signaling(dev, state, fence_state, num_fences, !ret);
1379
1380 if (ret == -EDEADLK) {
1381 drm_atomic_state_clear(state);
1382 ret = drm_modeset_backoff(&ctx);
1383 if (!ret)
1384 goto retry;
1385 }
1386
1387 drm_atomic_state_put(state);
1388
1389 drm_modeset_drop_locks(&ctx);
1390 drm_modeset_acquire_fini(&ctx);
1391
1392 return ret;
1393}
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-03 09:44:28 -0400