1 /* $NetBSD: drm_crtc.c,v 1.19 2021/12/19 00:56:18 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 2006-2008 Intel Corporation
5 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
6 * Copyright (c) 2008 Red Hat Inc.
7 *
8 * DRM core CRTC related functions
9 *
10 * Permission to use, copy, modify, distribute, and sell this software and its
11 * documentation for any purpose is hereby granted without fee, provided that
12 * the above copyright notice appear in all copies and that both that copyright
13 * notice and this permission notice appear in supporting documentation, and
14 * that the name of the copyright holders not be used in advertising or
15 * publicity pertaining to distribution of the software without specific,
16 * written prior permission. The copyright holders make no representations
17 * about the suitability of this software for any purpose. It is provided "as
18 * is" without express or implied warranty.
19 *
20 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
21 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
22 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
23 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
24 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
25 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
26 * OF THIS SOFTWARE.
27 *
28 * Authors:
29 * Keith Packard
30 * Eric Anholt <eric@anholt.net>
31 * Dave Airlie <airlied@linux.ie>
32 * Jesse Barnes <jesse.barnes@intel.com>
33 */
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: drm_crtc.c,v 1.19 2021/12/19 00:56:18 riastradh Exp $");
36
37 #include <linux/ctype.h>
38 #include <linux/list.h>
39 #include <linux/slab.h>
40 #include <linux/export.h>
41 #include <linux/dma-fence.h>
42 #include <linux/uaccess.h>
43 #include <drm/drm_crtc.h>
44 #include <drm/drm_edid.h>
45 #include <drm/drm_fourcc.h>
46 #include <drm/drm_modeset_lock.h>
47 #include <drm/drm_atomic.h>
48 #include <drm/drm_auth.h>
49 #include <drm/drm_debugfs_crc.h>
50 #include <drm/drm_drv.h>
51 #include <drm/drm_print.h>
52 #include <drm/drm_file.h>
53
54 #include "drm_crtc_internal.h"
55 #include "drm_internal.h"
56
57 #include <linux/nbsd-namespace.h>
58 /**
59 * DOC: overview
60 *
61 * A CRTC represents the overall display pipeline. It receives pixel data from
62 * &drm_plane and blends them together. The &drm_display_mode is also attached
63 * to the CRTC, specifying display timings. On the output side the data is fed
64 * to one or more &drm_encoder, which are then each connected to one
65 * &drm_connector.
66 *
67 * To create a CRTC, a KMS drivers allocates and zeroes an instances of
68 * &struct drm_crtc (possibly as part of a larger structure) and registers it
69 * with a call to drm_crtc_init_with_planes().
70 *
71 * The CRTC is also the entry point for legacy modeset operations, see
72 * &drm_crtc_funcs.set_config, legacy plane operations, see
73 * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy
74 * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these
75 * features are controlled through &drm_property and
76 * &drm_mode_config_funcs.atomic_check and &drm_mode_config_funcs.atomic_check.
77 */
78
79 /**
80 * drm_crtc_from_index - find the registered CRTC at an index
81 * @dev: DRM device
82 * @idx: index of registered CRTC to find for
83 *
84 * Given a CRTC index, return the registered CRTC from DRM device's
85 * list of CRTCs with matching index. This is the inverse of drm_crtc_index().
86 * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or
87 * &drm_driver.disable_vblank), since that still deals with indices instead
88 * of pointers to &struct drm_crtc."
89 */
drm_crtc_from_index(struct drm_device * dev,int idx)90 struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx)
91 {
92 struct drm_crtc *crtc;
93
94 drm_for_each_crtc(crtc, dev)
95 if (idx == crtc->index)
96 return crtc;
97
98 return NULL;
99 }
100 EXPORT_SYMBOL(drm_crtc_from_index);
101
drm_crtc_force_disable(struct drm_crtc * crtc)102 int drm_crtc_force_disable(struct drm_crtc *crtc)
103 {
104 struct drm_mode_set set = {
105 .crtc = crtc,
106 };
107
108 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
109
110 return drm_mode_set_config_internal(&set);
111 }
112
drm_num_crtcs(struct drm_device * dev)113 static unsigned int drm_num_crtcs(struct drm_device *dev)
114 {
115 unsigned int num = 0;
116 struct drm_crtc *tmp;
117
118 drm_for_each_crtc(tmp, dev) {
119 num++;
120 }
121
122 return num;
123 }
124
drm_crtc_register_all(struct drm_device * dev)125 int drm_crtc_register_all(struct drm_device *dev)
126 {
127 struct drm_crtc *crtc;
128 int ret = 0;
129
130 drm_for_each_crtc(crtc, dev) {
131 drm_debugfs_crtc_add(crtc);
132
133 if (crtc->funcs->late_register)
134 ret = crtc->funcs->late_register(crtc);
135 if (ret)
136 return ret;
137 }
138
139 return 0;
140 }
141
drm_crtc_unregister_all(struct drm_device * dev)142 void drm_crtc_unregister_all(struct drm_device *dev)
143 {
144 struct drm_crtc *crtc;
145
146 drm_for_each_crtc(crtc, dev) {
147 if (crtc->funcs->early_unregister)
148 crtc->funcs->early_unregister(crtc);
149 drm_debugfs_crtc_remove(crtc);
150 }
151 }
152
drm_crtc_crc_init(struct drm_crtc * crtc)153 static int drm_crtc_crc_init(struct drm_crtc *crtc)
154 {
155 #ifdef CONFIG_DEBUG_FS
156 spin_lock_init(&crtc->crc.lock);
157 init_waitqueue_head(&crtc->crc.wq);
158 crtc->crc.source = kstrdup("auto", GFP_KERNEL);
159 if (!crtc->crc.source)
160 return -ENOMEM;
161 #endif
162 return 0;
163 }
164
drm_crtc_crc_fini(struct drm_crtc * crtc)165 static void drm_crtc_crc_fini(struct drm_crtc *crtc)
166 {
167 #ifdef CONFIG_DEBUG_FS
168 kfree(crtc->crc.source);
169 #endif
170 }
171
172 static const struct dma_fence_ops drm_crtc_fence_ops;
173
fence_to_crtc(struct dma_fence * fence)174 static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
175 {
176 BUG_ON(fence->ops != &drm_crtc_fence_ops);
177 return container_of(fence->lock, struct drm_crtc, fence_lock);
178 }
179
drm_crtc_fence_get_driver_name(struct dma_fence * fence)180 static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
181 {
182 struct drm_crtc *crtc = fence_to_crtc(fence);
183
184 return crtc->dev->driver->name;
185 }
186
drm_crtc_fence_get_timeline_name(struct dma_fence * fence)187 static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
188 {
189 struct drm_crtc *crtc = fence_to_crtc(fence);
190
191 return crtc->timeline_name;
192 }
193
194 static const struct dma_fence_ops drm_crtc_fence_ops = {
195 .get_driver_name = drm_crtc_fence_get_driver_name,
196 .get_timeline_name = drm_crtc_fence_get_timeline_name,
197 };
198
drm_crtc_create_fence(struct drm_crtc * crtc)199 struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
200 {
201 struct dma_fence *fence;
202
203 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
204 if (!fence)
205 return NULL;
206
207 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
208 crtc->fence_context, ++crtc->fence_seqno);
209
210 return fence;
211 }
212
213 /**
214 * drm_crtc_init_with_planes - Initialise a new CRTC object with
215 * specified primary and cursor planes.
216 * @dev: DRM device
217 * @crtc: CRTC object to init
218 * @primary: Primary plane for CRTC
219 * @cursor: Cursor plane for CRTC
220 * @funcs: callbacks for the new CRTC
221 * @name: printf style format string for the CRTC name, or NULL for default name
222 *
223 * Inits a new object created as base part of a driver crtc object. Drivers
224 * should use this function instead of drm_crtc_init(), which is only provided
225 * for backwards compatibility with drivers which do not yet support universal
226 * planes). For really simple hardware which has only 1 plane look at
227 * drm_simple_display_pipe_init() instead.
228 *
229 * Returns:
230 * Zero on success, error code on failure.
231 */
drm_crtc_init_with_planes(struct drm_device * dev,struct drm_crtc * crtc,struct drm_plane * primary,struct drm_plane * cursor,const struct drm_crtc_funcs * funcs,const char * name,...)232 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
233 struct drm_plane *primary,
234 struct drm_plane *cursor,
235 const struct drm_crtc_funcs *funcs,
236 const char *name, ...)
237 {
238 struct drm_mode_config *config = &dev->mode_config;
239 int ret;
240
241 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
242 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
243
244 /* crtc index is used with 32bit bitmasks */
245 if (WARN_ON(config->num_crtc >= 32))
246 return -EINVAL;
247
248 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
249 (!funcs->atomic_destroy_state ||
250 !funcs->atomic_duplicate_state));
251
252 crtc->dev = dev;
253 crtc->funcs = funcs;
254
255 INIT_LIST_HEAD(&crtc->commit_list);
256 spin_lock_init(&crtc->commit_lock);
257
258 drm_modeset_lock_init(&crtc->mutex);
259 ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
260 if (ret)
261 return ret;
262
263 if (name) {
264 va_list ap;
265
266 va_start(ap, name);
267 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
268 va_end(ap);
269 } else {
270 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
271 drm_num_crtcs(dev));
272 }
273 if (!crtc->name) {
274 drm_mode_object_unregister(dev, &crtc->base);
275 return -ENOMEM;
276 }
277
278 crtc->fence_context = dma_fence_context_alloc(1);
279 spin_lock_init(&crtc->fence_lock);
280 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
281 "CRTC:%d-%s", crtc->base.id, crtc->name);
282
283 crtc->base.properties = &crtc->properties;
284
285 list_add_tail(&crtc->head, &config->crtc_list);
286 crtc->index = config->num_crtc++;
287
288 crtc->primary = primary;
289 crtc->cursor = cursor;
290 if (primary && !primary->possible_crtcs)
291 primary->possible_crtcs = drm_crtc_mask(crtc);
292 if (cursor && !cursor->possible_crtcs)
293 cursor->possible_crtcs = drm_crtc_mask(crtc);
294
295 ret = drm_crtc_crc_init(crtc);
296 if (ret) {
297 drm_mode_object_unregister(dev, &crtc->base);
298 return ret;
299 }
300
301 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
302 drm_object_attach_property(&crtc->base, config->prop_active, 0);
303 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
304 drm_object_attach_property(&crtc->base,
305 config->prop_out_fence_ptr, 0);
306 drm_object_attach_property(&crtc->base,
307 config->prop_vrr_enabled, 0);
308 }
309
310 return 0;
311 }
312 EXPORT_SYMBOL(drm_crtc_init_with_planes);
313
314 /**
315 * drm_crtc_cleanup - Clean up the core crtc usage
316 * @crtc: CRTC to cleanup
317 *
318 * This function cleans up @crtc and removes it from the DRM mode setting
319 * core. Note that the function does *not* free the crtc structure itself,
320 * this is the responsibility of the caller.
321 */
drm_crtc_cleanup(struct drm_crtc * crtc)322 void drm_crtc_cleanup(struct drm_crtc *crtc)
323 {
324 struct drm_device *dev = crtc->dev;
325
326 /* Note that the crtc_list is considered to be static; should we
327 * remove the drm_crtc at runtime we would have to decrement all
328 * the indices on the drm_crtc after us in the crtc_list.
329 */
330
331 drm_crtc_crc_fini(crtc);
332
333 kfree(crtc->gamma_store);
334 crtc->gamma_store = NULL;
335
336 drm_modeset_lock_fini(&crtc->mutex);
337
338 drm_mode_object_unregister(dev, &crtc->base);
339 list_del(&crtc->head);
340 dev->mode_config.num_crtc--;
341
342 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
343 if (crtc->state && crtc->funcs->atomic_destroy_state)
344 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
345
346 kfree(crtc->name);
347
348 memset(crtc, 0, sizeof(*crtc));
349 }
350 EXPORT_SYMBOL(drm_crtc_cleanup);
351
352 /**
353 * drm_mode_getcrtc - get CRTC configuration
354 * @dev: drm device for the ioctl
355 * @data: data pointer for the ioctl
356 * @file_priv: drm file for the ioctl call
357 *
358 * Construct a CRTC configuration structure to return to the user.
359 *
360 * Called by the user via ioctl.
361 *
362 * Returns:
363 * Zero on success, negative errno on failure.
364 */
drm_mode_getcrtc(struct drm_device * dev,void * data,struct drm_file * file_priv)365 int drm_mode_getcrtc(struct drm_device *dev,
366 void *data, struct drm_file *file_priv)
367 {
368 struct drm_mode_crtc *crtc_resp = data;
369 struct drm_crtc *crtc;
370 struct drm_plane *plane;
371
372 if (!drm_core_check_feature(dev, DRIVER_MODESET))
373 return -EOPNOTSUPP;
374
375 crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
376 if (!crtc)
377 return -ENOENT;
378
379 plane = crtc->primary;
380
381 crtc_resp->gamma_size = crtc->gamma_size;
382
383 drm_modeset_lock(&plane->mutex, NULL);
384 if (plane->state && plane->state->fb)
385 crtc_resp->fb_id = plane->state->fb->base.id;
386 else if (!plane->state && plane->fb)
387 crtc_resp->fb_id = plane->fb->base.id;
388 else
389 crtc_resp->fb_id = 0;
390
391 if (plane->state) {
392 crtc_resp->x = plane->state->src_x >> 16;
393 crtc_resp->y = plane->state->src_y >> 16;
394 }
395 drm_modeset_unlock(&plane->mutex);
396
397 drm_modeset_lock(&crtc->mutex, NULL);
398 if (crtc->state) {
399 if (crtc->state->enable) {
400 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
401 crtc_resp->mode_valid = 1;
402 } else {
403 crtc_resp->mode_valid = 0;
404 }
405 } else {
406 crtc_resp->x = crtc->x;
407 crtc_resp->y = crtc->y;
408
409 if (crtc->enabled) {
410 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
411 crtc_resp->mode_valid = 1;
412
413 } else {
414 crtc_resp->mode_valid = 0;
415 }
416 }
417 if (!file_priv->aspect_ratio_allowed)
418 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
419 drm_modeset_unlock(&crtc->mutex);
420
421 return 0;
422 }
423
__drm_mode_set_config_internal(struct drm_mode_set * set,struct drm_modeset_acquire_ctx * ctx)424 static int __drm_mode_set_config_internal(struct drm_mode_set *set,
425 struct drm_modeset_acquire_ctx *ctx)
426 {
427 struct drm_crtc *crtc = set->crtc;
428 struct drm_framebuffer *fb;
429 struct drm_crtc *tmp;
430 int ret;
431
432 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
433
434 /*
435 * NOTE: ->set_config can also disable other crtcs (if we steal all
436 * connectors from it), hence we need to refcount the fbs across all
437 * crtcs. Atomic modeset will have saner semantics ...
438 */
439 drm_for_each_crtc(tmp, crtc->dev) {
440 struct drm_plane *plane = tmp->primary;
441
442 plane->old_fb = plane->fb;
443 }
444
445 fb = set->fb;
446
447 ret = crtc->funcs->set_config(set, ctx);
448 if (ret == 0) {
449 struct drm_plane *plane = crtc->primary;
450
451 plane->crtc = fb ? crtc : NULL;
452 plane->fb = fb;
453 }
454
455 drm_for_each_crtc(tmp, crtc->dev) {
456 struct drm_plane *plane = tmp->primary;
457
458 if (plane->fb)
459 drm_framebuffer_get(plane->fb);
460 if (plane->old_fb)
461 drm_framebuffer_put(plane->old_fb);
462 plane->old_fb = NULL;
463 }
464
465 return ret;
466 }
467
468 /**
469 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
470 * @set: modeset config to set
471 *
472 * This is a little helper to wrap internal calls to the
473 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
474 * correct refcounting dance.
475 *
476 * This should only be used by non-atomic legacy drivers.
477 *
478 * Returns:
479 * Zero on success, negative errno on failure.
480 */
drm_mode_set_config_internal(struct drm_mode_set * set)481 int drm_mode_set_config_internal(struct drm_mode_set *set)
482 {
483 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
484
485 return __drm_mode_set_config_internal(set, NULL);
486 }
487 EXPORT_SYMBOL(drm_mode_set_config_internal);
488
489 /**
490 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
491 * CRTC viewport
492 * @crtc: CRTC that framebuffer will be displayed on
493 * @x: x panning
494 * @y: y panning
495 * @mode: mode that framebuffer will be displayed under
496 * @fb: framebuffer to check size of
497 */
drm_crtc_check_viewport(const struct drm_crtc * crtc,int x,int y,const struct drm_display_mode * mode,const struct drm_framebuffer * fb)498 int drm_crtc_check_viewport(const struct drm_crtc *crtc,
499 int x, int y,
500 const struct drm_display_mode *mode,
501 const struct drm_framebuffer *fb)
502
503 {
504 int hdisplay, vdisplay;
505
506 drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay);
507
508 if (crtc->state &&
509 drm_rotation_90_or_270(crtc->primary->state->rotation))
510 swap(hdisplay, vdisplay);
511
512 return drm_framebuffer_check_src_coords(x << 16, y << 16,
513 hdisplay << 16, vdisplay << 16,
514 fb);
515 }
516 EXPORT_SYMBOL(drm_crtc_check_viewport);
517
518 /**
519 * drm_mode_setcrtc - set CRTC configuration
520 * @dev: drm device for the ioctl
521 * @data: data pointer for the ioctl
522 * @file_priv: drm file for the ioctl call
523 *
524 * Build a new CRTC configuration based on user request.
525 *
526 * Called by the user via ioctl.
527 *
528 * Returns:
529 * Zero on success, negative errno on failure.
530 */
drm_mode_setcrtc(struct drm_device * dev,void * data,struct drm_file * file_priv)531 int drm_mode_setcrtc(struct drm_device *dev, void *data,
532 struct drm_file *file_priv)
533 {
534 struct drm_mode_config *config = &dev->mode_config;
535 struct drm_mode_crtc *crtc_req = data;
536 struct drm_crtc *crtc;
537 struct drm_plane *plane;
538 struct drm_connector **connector_set = NULL, *connector;
539 struct drm_framebuffer *fb = NULL;
540 struct drm_display_mode *mode = NULL;
541 struct drm_mode_set set;
542 uint32_t __user *set_connectors_ptr;
543 struct drm_modeset_acquire_ctx ctx;
544 int ret;
545 int i;
546
547 if (!drm_core_check_feature(dev, DRIVER_MODESET))
548 return -EOPNOTSUPP;
549
550 /*
551 * Universal plane src offsets are only 16.16, prevent havoc for
552 * drivers using universal plane code internally.
553 */
554 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
555 return -ERANGE;
556
557 crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
558 if (!crtc) {
559 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
560 return -ENOENT;
561 }
562 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
563
564 plane = crtc->primary;
565
566 /* allow disabling with the primary plane leased */
567 if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
568 return -EACCES;
569
570 mutex_lock(&crtc->dev->mode_config.mutex);
571 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
572 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
573
574 if (crtc_req->mode_valid) {
575 /* If we have a mode we need a framebuffer. */
576 /* If we pass -1, set the mode with the currently bound fb */
577 if (crtc_req->fb_id == -1) {
578 struct drm_framebuffer *old_fb;
579
580 if (plane->state)
581 old_fb = plane->state->fb;
582 else
583 old_fb = plane->fb;
584
585 if (!old_fb) {
586 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
587 ret = -EINVAL;
588 goto out;
589 }
590
591 fb = old_fb;
592 /* Make refcounting symmetric with the lookup path. */
593 drm_framebuffer_get(fb);
594 } else {
595 fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
596 if (!fb) {
597 DRM_DEBUG_KMS("Unknown FB ID%d\n",
598 crtc_req->fb_id);
599 ret = -ENOENT;
600 goto out;
601 }
602 }
603
604 mode = drm_mode_create(dev);
605 if (!mode) {
606 ret = -ENOMEM;
607 goto out;
608 }
609 if (!file_priv->aspect_ratio_allowed &&
610 (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
611 DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
612 ret = -EINVAL;
613 goto out;
614 }
615
616
617 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
618 if (ret) {
619 DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
620 ret, drm_get_mode_status_name(mode->status));
621 drm_mode_debug_printmodeline(mode);
622 goto out;
623 }
624
625 /*
626 * Check whether the primary plane supports the fb pixel format.
627 * Drivers not implementing the universal planes API use a
628 * default formats list provided by the DRM core which doesn't
629 * match real hardware capabilities. Skip the check in that
630 * case.
631 */
632 if (!plane->format_default) {
633 ret = drm_plane_check_pixel_format(plane,
634 fb->format->format,
635 fb->modifier);
636 if (ret) {
637 struct drm_format_name_buf format_name;
638 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%"PRIx64"\n",
639 drm_get_format_name(fb->format->format,
640 &format_name),
641 fb->modifier);
642 goto out;
643 }
644 }
645
646 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
647 mode, fb);
648 if (ret)
649 goto out;
650
651 }
652
653 if (crtc_req->count_connectors == 0 && mode) {
654 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
655 ret = -EINVAL;
656 goto out;
657 }
658
659 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
660 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
661 crtc_req->count_connectors);
662 ret = -EINVAL;
663 goto out;
664 }
665
666 if (crtc_req->count_connectors > 0) {
667 u32 out_id;
668
669 /* Avoid unbounded kernel memory allocation */
670 if (crtc_req->count_connectors > config->num_connector) {
671 ret = -EINVAL;
672 goto out;
673 }
674
675 connector_set = kmalloc_array(crtc_req->count_connectors,
676 sizeof(struct drm_connector *),
677 GFP_KERNEL);
678 if (!connector_set) {
679 ret = -ENOMEM;
680 goto out;
681 }
682
683 for (i = 0; i < crtc_req->count_connectors; i++) {
684 connector_set[i] = NULL;
685 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
686 if (get_user(out_id, &set_connectors_ptr[i])) {
687 ret = -EFAULT;
688 goto out;
689 }
690
691 connector = drm_connector_lookup(dev, file_priv, out_id);
692 if (!connector) {
693 DRM_DEBUG_KMS("Connector id %d unknown\n",
694 out_id);
695 ret = -ENOENT;
696 goto out;
697 }
698 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
699 connector->base.id,
700 connector->name);
701
702 connector_set[i] = connector;
703 }
704 }
705
706 set.crtc = crtc;
707 set.x = crtc_req->x;
708 set.y = crtc_req->y;
709 set.mode = mode;
710 set.connectors = connector_set;
711 set.num_connectors = crtc_req->count_connectors;
712 set.fb = fb;
713
714 if (drm_drv_uses_atomic_modeset(dev))
715 ret = crtc->funcs->set_config(&set, &ctx);
716 else
717 ret = __drm_mode_set_config_internal(&set, &ctx);
718
719 out:
720 if (fb)
721 drm_framebuffer_put(fb);
722
723 if (connector_set) {
724 for (i = 0; i < crtc_req->count_connectors; i++) {
725 if (connector_set[i])
726 drm_connector_put(connector_set[i]);
727 }
728 }
729 kfree(connector_set);
730 drm_mode_destroy(dev, mode);
731
732 /* In case we need to retry... */
733 connector_set = NULL;
734 fb = NULL;
735 mode = NULL;
736
737 DRM_MODESET_LOCK_ALL_END(ctx, ret);
738 mutex_unlock(&crtc->dev->mode_config.mutex);
739
740 return ret;
741 }
742
drm_mode_crtc_set_obj_prop(struct drm_mode_object * obj,struct drm_property * property,uint64_t value)743 int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
744 struct drm_property *property,
745 uint64_t value)
746 {
747 int ret = -EINVAL;
748 struct drm_crtc *crtc = obj_to_crtc(obj);
749
750 if (crtc->funcs->set_property)
751 ret = crtc->funcs->set_property(crtc, property, value);
752 if (!ret)
753 drm_object_property_set_value(obj, property, value);
754
755 return ret;
756 }
757