Loading...
1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
5 *
6 * DRM core CRTC related functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Keith Packard
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
31 */
32#include <linux/ctype.h>
33#include <linux/list.h>
34#include <linux/slab.h>
35#include <linux/export.h>
36#include <linux/dma-fence.h>
37#include <linux/uaccess.h>
38#include <drm/drm_crtc.h>
39#include <drm/drm_edid.h>
40#include <drm/drm_fourcc.h>
41#include <drm/drm_modeset_lock.h>
42#include <drm/drm_atomic.h>
43#include <drm/drm_auth.h>
44#include <drm/drm_debugfs_crc.h>
45#include <drm/drm_drv.h>
46#include <drm/drm_print.h>
47#include <drm/drm_file.h>
48
49#include "drm_crtc_internal.h"
50#include "drm_internal.h"
51
52/**
53 * DOC: overview
54 *
55 * A CRTC represents the overall display pipeline. It receives pixel data from
56 * &drm_plane and blends them together. The &drm_display_mode is also attached
57 * to the CRTC, specifying display timings. On the output side the data is fed
58 * to one or more &drm_encoder, which are then each connected to one
59 * &drm_connector.
60 *
61 * To create a CRTC, a KMS drivers allocates and zeroes an instances of
62 * &struct drm_crtc (possibly as part of a larger structure) and registers it
63 * with a call to drm_crtc_init_with_planes().
64 *
65 * The CRTC is also the entry point for legacy modeset operations, see
66 * &drm_crtc_funcs.set_config, legacy plane operations, see
67 * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy
68 * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these
69 * features are controlled through &drm_property and
70 * &drm_mode_config_funcs.atomic_check and &drm_mode_config_funcs.atomic_check.
71 */
72
73/**
74 * drm_crtc_from_index - find the registered CRTC at an index
75 * @dev: DRM device
76 * @idx: index of registered CRTC to find for
77 *
78 * Given a CRTC index, return the registered CRTC from DRM device's
79 * list of CRTCs with matching index. This is the inverse of drm_crtc_index().
80 * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or
81 * &drm_driver.disable_vblank), since that still deals with indices instead
82 * of pointers to &struct drm_crtc."
83 */
84struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx)
85{
86 struct drm_crtc *crtc;
87
88 drm_for_each_crtc(crtc, dev)
89 if (idx == crtc->index)
90 return crtc;
91
92 return NULL;
93}
94EXPORT_SYMBOL(drm_crtc_from_index);
95
96int drm_crtc_force_disable(struct drm_crtc *crtc)
97{
98 struct drm_mode_set set = {
99 .crtc = crtc,
100 };
101
102 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
103
104 return drm_mode_set_config_internal(&set);
105}
106
107static unsigned int drm_num_crtcs(struct drm_device *dev)
108{
109 unsigned int num = 0;
110 struct drm_crtc *tmp;
111
112 drm_for_each_crtc(tmp, dev) {
113 num++;
114 }
115
116 return num;
117}
118
119int drm_crtc_register_all(struct drm_device *dev)
120{
121 struct drm_crtc *crtc;
122 int ret = 0;
123
124 drm_for_each_crtc(crtc, dev) {
125 drm_debugfs_crtc_add(crtc);
126
127 if (crtc->funcs->late_register)
128 ret = crtc->funcs->late_register(crtc);
129 if (ret)
130 return ret;
131 }
132
133 return 0;
134}
135
136void drm_crtc_unregister_all(struct drm_device *dev)
137{
138 struct drm_crtc *crtc;
139
140 drm_for_each_crtc(crtc, dev) {
141 if (crtc->funcs->early_unregister)
142 crtc->funcs->early_unregister(crtc);
143 drm_debugfs_crtc_remove(crtc);
144 }
145}
146
147static int drm_crtc_crc_init(struct drm_crtc *crtc)
148{
149#ifdef CONFIG_DEBUG_FS
150 spin_lock_init(&crtc->crc.lock);
151 init_waitqueue_head(&crtc->crc.wq);
152 crtc->crc.source = kstrdup("auto", GFP_KERNEL);
153 if (!crtc->crc.source)
154 return -ENOMEM;
155#endif
156 return 0;
157}
158
159static void drm_crtc_crc_fini(struct drm_crtc *crtc)
160{
161#ifdef CONFIG_DEBUG_FS
162 kfree(crtc->crc.source);
163#endif
164}
165
166static const struct dma_fence_ops drm_crtc_fence_ops;
167
168static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
169{
170 BUG_ON(fence->ops != &drm_crtc_fence_ops);
171 return container_of(fence->lock, struct drm_crtc, fence_lock);
172}
173
174static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
175{
176 struct drm_crtc *crtc = fence_to_crtc(fence);
177
178 return crtc->dev->driver->name;
179}
180
181static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
182{
183 struct drm_crtc *crtc = fence_to_crtc(fence);
184
185 return crtc->timeline_name;
186}
187
188static const struct dma_fence_ops drm_crtc_fence_ops = {
189 .get_driver_name = drm_crtc_fence_get_driver_name,
190 .get_timeline_name = drm_crtc_fence_get_timeline_name,
191};
192
193struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
194{
195 struct dma_fence *fence;
196
197 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
198 if (!fence)
199 return NULL;
200
201 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
202 crtc->fence_context, ++crtc->fence_seqno);
203
204 return fence;
205}
206
207/**
208 * DOC: standard CRTC properties
209 *
210 * DRM CRTCs have a few standardized properties:
211 *
212 * ACTIVE:
213 * Atomic property for setting the power state of the CRTC. When set to 1
214 * the CRTC will actively display content. When set to 0 the CRTC will be
215 * powered off. There is no expectation that user-space will reset CRTC
216 * resources like the mode and planes when setting ACTIVE to 0.
217 *
218 * User-space can rely on an ACTIVE change to 1 to never fail an atomic
219 * test as long as no other property has changed. If a change to ACTIVE
220 * fails an atomic test, this is a driver bug. For this reason setting
221 * ACTIVE to 0 must not release internal resources (like reserved memory
222 * bandwidth or clock generators).
223 *
224 * Note that the legacy DPMS property on connectors is internally routed
225 * to control this property for atomic drivers.
226 * MODE_ID:
227 * Atomic property for setting the CRTC display timings. The value is the
228 * ID of a blob containing the DRM mode info. To disable the CRTC,
229 * user-space must set this property to 0.
230 *
231 * Setting MODE_ID to 0 will release reserved resources for the CRTC.
232 */
233
234/**
235 * drm_crtc_init_with_planes - Initialise a new CRTC object with
236 * specified primary and cursor planes.
237 * @dev: DRM device
238 * @crtc: CRTC object to init
239 * @primary: Primary plane for CRTC
240 * @cursor: Cursor plane for CRTC
241 * @funcs: callbacks for the new CRTC
242 * @name: printf style format string for the CRTC name, or NULL for default name
243 *
244 * Inits a new object created as base part of a driver crtc object. Drivers
245 * should use this function instead of drm_crtc_init(), which is only provided
246 * for backwards compatibility with drivers which do not yet support universal
247 * planes). For really simple hardware which has only 1 plane look at
248 * drm_simple_display_pipe_init() instead.
249 *
250 * Returns:
251 * Zero on success, error code on failure.
252 */
253int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
254 struct drm_plane *primary,
255 struct drm_plane *cursor,
256 const struct drm_crtc_funcs *funcs,
257 const char *name, ...)
258{
259 struct drm_mode_config *config = &dev->mode_config;
260 int ret;
261
262 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
263 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
264
265 /* crtc index is used with 32bit bitmasks */
266 if (WARN_ON(config->num_crtc >= 32))
267 return -EINVAL;
268
269 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
270 (!funcs->atomic_destroy_state ||
271 !funcs->atomic_duplicate_state));
272
273 crtc->dev = dev;
274 crtc->funcs = funcs;
275
276 INIT_LIST_HEAD(&crtc->commit_list);
277 spin_lock_init(&crtc->commit_lock);
278
279 drm_modeset_lock_init(&crtc->mutex);
280 ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
281 if (ret)
282 return ret;
283
284 if (name) {
285 va_list ap;
286
287 va_start(ap, name);
288 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
289 va_end(ap);
290 } else {
291 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
292 drm_num_crtcs(dev));
293 }
294 if (!crtc->name) {
295 drm_mode_object_unregister(dev, &crtc->base);
296 return -ENOMEM;
297 }
298
299 crtc->fence_context = dma_fence_context_alloc(1);
300 spin_lock_init(&crtc->fence_lock);
301 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
302 "CRTC:%d-%s", crtc->base.id, crtc->name);
303
304 crtc->base.properties = &crtc->properties;
305
306 list_add_tail(&crtc->head, &config->crtc_list);
307 crtc->index = config->num_crtc++;
308
309 crtc->primary = primary;
310 crtc->cursor = cursor;
311 if (primary && !primary->possible_crtcs)
312 primary->possible_crtcs = drm_crtc_mask(crtc);
313 if (cursor && !cursor->possible_crtcs)
314 cursor->possible_crtcs = drm_crtc_mask(crtc);
315
316 ret = drm_crtc_crc_init(crtc);
317 if (ret) {
318 drm_mode_object_unregister(dev, &crtc->base);
319 return ret;
320 }
321
322 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
323 drm_object_attach_property(&crtc->base, config->prop_active, 0);
324 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
325 drm_object_attach_property(&crtc->base,
326 config->prop_out_fence_ptr, 0);
327 drm_object_attach_property(&crtc->base,
328 config->prop_vrr_enabled, 0);
329 }
330
331 return 0;
332}
333EXPORT_SYMBOL(drm_crtc_init_with_planes);
334
335/**
336 * drm_crtc_cleanup - Clean up the core crtc usage
337 * @crtc: CRTC to cleanup
338 *
339 * This function cleans up @crtc and removes it from the DRM mode setting
340 * core. Note that the function does *not* free the crtc structure itself,
341 * this is the responsibility of the caller.
342 */
343void drm_crtc_cleanup(struct drm_crtc *crtc)
344{
345 struct drm_device *dev = crtc->dev;
346
347 /* Note that the crtc_list is considered to be static; should we
348 * remove the drm_crtc at runtime we would have to decrement all
349 * the indices on the drm_crtc after us in the crtc_list.
350 */
351
352 drm_crtc_crc_fini(crtc);
353
354 kfree(crtc->gamma_store);
355 crtc->gamma_store = NULL;
356
357 drm_modeset_lock_fini(&crtc->mutex);
358
359 drm_mode_object_unregister(dev, &crtc->base);
360 list_del(&crtc->head);
361 dev->mode_config.num_crtc--;
362
363 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
364 if (crtc->state && crtc->funcs->atomic_destroy_state)
365 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
366
367 kfree(crtc->name);
368
369 memset(crtc, 0, sizeof(*crtc));
370}
371EXPORT_SYMBOL(drm_crtc_cleanup);
372
373/**
374 * drm_mode_getcrtc - get CRTC configuration
375 * @dev: drm device for the ioctl
376 * @data: data pointer for the ioctl
377 * @file_priv: drm file for the ioctl call
378 *
379 * Construct a CRTC configuration structure to return to the user.
380 *
381 * Called by the user via ioctl.
382 *
383 * Returns:
384 * Zero on success, negative errno on failure.
385 */
386int drm_mode_getcrtc(struct drm_device *dev,
387 void *data, struct drm_file *file_priv)
388{
389 struct drm_mode_crtc *crtc_resp = data;
390 struct drm_crtc *crtc;
391 struct drm_plane *plane;
392
393 if (!drm_core_check_feature(dev, DRIVER_MODESET))
394 return -EOPNOTSUPP;
395
396 crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
397 if (!crtc)
398 return -ENOENT;
399
400 plane = crtc->primary;
401
402 crtc_resp->gamma_size = crtc->gamma_size;
403
404 drm_modeset_lock(&plane->mutex, NULL);
405 if (plane->state && plane->state->fb)
406 crtc_resp->fb_id = plane->state->fb->base.id;
407 else if (!plane->state && plane->fb)
408 crtc_resp->fb_id = plane->fb->base.id;
409 else
410 crtc_resp->fb_id = 0;
411
412 if (plane->state) {
413 crtc_resp->x = plane->state->src_x >> 16;
414 crtc_resp->y = plane->state->src_y >> 16;
415 }
416 drm_modeset_unlock(&plane->mutex);
417
418 drm_modeset_lock(&crtc->mutex, NULL);
419 if (crtc->state) {
420 if (crtc->state->enable) {
421 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
422 crtc_resp->mode_valid = 1;
423 } else {
424 crtc_resp->mode_valid = 0;
425 }
426 } else {
427 crtc_resp->x = crtc->x;
428 crtc_resp->y = crtc->y;
429
430 if (crtc->enabled) {
431 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
432 crtc_resp->mode_valid = 1;
433
434 } else {
435 crtc_resp->mode_valid = 0;
436 }
437 }
438 if (!file_priv->aspect_ratio_allowed)
439 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
440 drm_modeset_unlock(&crtc->mutex);
441
442 return 0;
443}
444
445static int __drm_mode_set_config_internal(struct drm_mode_set *set,
446 struct drm_modeset_acquire_ctx *ctx)
447{
448 struct drm_crtc *crtc = set->crtc;
449 struct drm_framebuffer *fb;
450 struct drm_crtc *tmp;
451 int ret;
452
453 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
454
455 /*
456 * NOTE: ->set_config can also disable other crtcs (if we steal all
457 * connectors from it), hence we need to refcount the fbs across all
458 * crtcs. Atomic modeset will have saner semantics ...
459 */
460 drm_for_each_crtc(tmp, crtc->dev) {
461 struct drm_plane *plane = tmp->primary;
462
463 plane->old_fb = plane->fb;
464 }
465
466 fb = set->fb;
467
468 ret = crtc->funcs->set_config(set, ctx);
469 if (ret == 0) {
470 struct drm_plane *plane = crtc->primary;
471
472 plane->crtc = fb ? crtc : NULL;
473 plane->fb = fb;
474 }
475
476 drm_for_each_crtc(tmp, crtc->dev) {
477 struct drm_plane *plane = tmp->primary;
478
479 if (plane->fb)
480 drm_framebuffer_get(plane->fb);
481 if (plane->old_fb)
482 drm_framebuffer_put(plane->old_fb);
483 plane->old_fb = NULL;
484 }
485
486 return ret;
487}
488
489/**
490 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
491 * @set: modeset config to set
492 *
493 * This is a little helper to wrap internal calls to the
494 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
495 * correct refcounting dance.
496 *
497 * This should only be used by non-atomic legacy drivers.
498 *
499 * Returns:
500 * Zero on success, negative errno on failure.
501 */
502int drm_mode_set_config_internal(struct drm_mode_set *set)
503{
504 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
505
506 return __drm_mode_set_config_internal(set, NULL);
507}
508EXPORT_SYMBOL(drm_mode_set_config_internal);
509
510/**
511 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
512 * CRTC viewport
513 * @crtc: CRTC that framebuffer will be displayed on
514 * @x: x panning
515 * @y: y panning
516 * @mode: mode that framebuffer will be displayed under
517 * @fb: framebuffer to check size of
518 */
519int drm_crtc_check_viewport(const struct drm_crtc *crtc,
520 int x, int y,
521 const struct drm_display_mode *mode,
522 const struct drm_framebuffer *fb)
523
524{
525 int hdisplay, vdisplay;
526
527 drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay);
528
529 if (crtc->state &&
530 drm_rotation_90_or_270(crtc->primary->state->rotation))
531 swap(hdisplay, vdisplay);
532
533 return drm_framebuffer_check_src_coords(x << 16, y << 16,
534 hdisplay << 16, vdisplay << 16,
535 fb);
536}
537EXPORT_SYMBOL(drm_crtc_check_viewport);
538
539/**
540 * drm_mode_setcrtc - set CRTC configuration
541 * @dev: drm device for the ioctl
542 * @data: data pointer for the ioctl
543 * @file_priv: drm file for the ioctl call
544 *
545 * Build a new CRTC configuration based on user request.
546 *
547 * Called by the user via ioctl.
548 *
549 * Returns:
550 * Zero on success, negative errno on failure.
551 */
552int drm_mode_setcrtc(struct drm_device *dev, void *data,
553 struct drm_file *file_priv)
554{
555 struct drm_mode_config *config = &dev->mode_config;
556 struct drm_mode_crtc *crtc_req = data;
557 struct drm_crtc *crtc;
558 struct drm_plane *plane;
559 struct drm_connector **connector_set = NULL, *connector;
560 struct drm_framebuffer *fb = NULL;
561 struct drm_display_mode *mode = NULL;
562 struct drm_mode_set set;
563 uint32_t __user *set_connectors_ptr;
564 struct drm_modeset_acquire_ctx ctx;
565 int ret;
566 int i;
567
568 if (!drm_core_check_feature(dev, DRIVER_MODESET))
569 return -EOPNOTSUPP;
570
571 /*
572 * Universal plane src offsets are only 16.16, prevent havoc for
573 * drivers using universal plane code internally.
574 */
575 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
576 return -ERANGE;
577
578 crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
579 if (!crtc) {
580 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
581 return -ENOENT;
582 }
583 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
584
585 plane = crtc->primary;
586
587 /* allow disabling with the primary plane leased */
588 if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
589 return -EACCES;
590
591 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
592 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
593
594 if (crtc_req->mode_valid) {
595 /* If we have a mode we need a framebuffer. */
596 /* If we pass -1, set the mode with the currently bound fb */
597 if (crtc_req->fb_id == -1) {
598 struct drm_framebuffer *old_fb;
599
600 if (plane->state)
601 old_fb = plane->state->fb;
602 else
603 old_fb = plane->fb;
604
605 if (!old_fb) {
606 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
607 ret = -EINVAL;
608 goto out;
609 }
610
611 fb = old_fb;
612 /* Make refcounting symmetric with the lookup path. */
613 drm_framebuffer_get(fb);
614 } else {
615 fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
616 if (!fb) {
617 DRM_DEBUG_KMS("Unknown FB ID%d\n",
618 crtc_req->fb_id);
619 ret = -ENOENT;
620 goto out;
621 }
622 }
623
624 mode = drm_mode_create(dev);
625 if (!mode) {
626 ret = -ENOMEM;
627 goto out;
628 }
629 if (!file_priv->aspect_ratio_allowed &&
630 (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
631 DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
632 ret = -EINVAL;
633 goto out;
634 }
635
636
637 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
638 if (ret) {
639 DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
640 ret, drm_get_mode_status_name(mode->status));
641 drm_mode_debug_printmodeline(mode);
642 goto out;
643 }
644
645 /*
646 * Check whether the primary plane supports the fb pixel format.
647 * Drivers not implementing the universal planes API use a
648 * default formats list provided by the DRM core which doesn't
649 * match real hardware capabilities. Skip the check in that
650 * case.
651 */
652 if (!plane->format_default) {
653 ret = drm_plane_check_pixel_format(plane,
654 fb->format->format,
655 fb->modifier);
656 if (ret) {
657 struct drm_format_name_buf format_name;
658
659 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
660 drm_get_format_name(fb->format->format,
661 &format_name),
662 fb->modifier);
663 goto out;
664 }
665 }
666
667 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
668 mode, fb);
669 if (ret)
670 goto out;
671
672 }
673
674 if (crtc_req->count_connectors == 0 && mode) {
675 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
676 ret = -EINVAL;
677 goto out;
678 }
679
680 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
681 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
682 crtc_req->count_connectors);
683 ret = -EINVAL;
684 goto out;
685 }
686
687 if (crtc_req->count_connectors > 0) {
688 u32 out_id;
689
690 /* Avoid unbounded kernel memory allocation */
691 if (crtc_req->count_connectors > config->num_connector) {
692 ret = -EINVAL;
693 goto out;
694 }
695
696 connector_set = kmalloc_array(crtc_req->count_connectors,
697 sizeof(struct drm_connector *),
698 GFP_KERNEL);
699 if (!connector_set) {
700 ret = -ENOMEM;
701 goto out;
702 }
703
704 for (i = 0; i < crtc_req->count_connectors; i++) {
705 connector_set[i] = NULL;
706 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
707 if (get_user(out_id, &set_connectors_ptr[i])) {
708 ret = -EFAULT;
709 goto out;
710 }
711
712 connector = drm_connector_lookup(dev, file_priv, out_id);
713 if (!connector) {
714 DRM_DEBUG_KMS("Connector id %d unknown\n",
715 out_id);
716 ret = -ENOENT;
717 goto out;
718 }
719 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
720 connector->base.id,
721 connector->name);
722
723 connector_set[i] = connector;
724 }
725 }
726
727 set.crtc = crtc;
728 set.x = crtc_req->x;
729 set.y = crtc_req->y;
730 set.mode = mode;
731 set.connectors = connector_set;
732 set.num_connectors = crtc_req->count_connectors;
733 set.fb = fb;
734
735 if (drm_drv_uses_atomic_modeset(dev))
736 ret = crtc->funcs->set_config(&set, &ctx);
737 else
738 ret = __drm_mode_set_config_internal(&set, &ctx);
739
740out:
741 if (fb)
742 drm_framebuffer_put(fb);
743
744 if (connector_set) {
745 for (i = 0; i < crtc_req->count_connectors; i++) {
746 if (connector_set[i])
747 drm_connector_put(connector_set[i]);
748 }
749 }
750 kfree(connector_set);
751 drm_mode_destroy(dev, mode);
752
753 /* In case we need to retry... */
754 connector_set = NULL;
755 fb = NULL;
756 mode = NULL;
757
758 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
759
760 return ret;
761}
762
763int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
764 struct drm_property *property,
765 uint64_t value)
766{
767 int ret = -EINVAL;
768 struct drm_crtc *crtc = obj_to_crtc(obj);
769
770 if (crtc->funcs->set_property)
771 ret = crtc->funcs->set_property(crtc, property, value);
772 if (!ret)
773 drm_object_property_set_value(obj, property, value);
774
775 return ret;
776}
1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
5 *
6 * DRM core CRTC related functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Keith Packard
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
31 */
32#include <linux/ctype.h>
33#include <linux/list.h>
34#include <linux/slab.h>
35#include <linux/export.h>
36#include <linux/dma-fence.h>
37#include <drm/drmP.h>
38#include <drm/drm_crtc.h>
39#include <drm/drm_edid.h>
40#include <drm/drm_fourcc.h>
41#include <drm/drm_modeset_lock.h>
42#include <drm/drm_atomic.h>
43#include <drm/drm_auth.h>
44#include <drm/drm_debugfs_crc.h>
45
46#include "drm_crtc_internal.h"
47#include "drm_internal.h"
48
49/**
50 * DOC: overview
51 *
52 * A CRTC represents the overall display pipeline. It receives pixel data from
53 * &drm_plane and blends them together. The &drm_display_mode is also attached
54 * to the CRTC, specifying display timings. On the output side the data is fed
55 * to one or more &drm_encoder, which are then each connected to one
56 * &drm_connector.
57 *
58 * To create a CRTC, a KMS drivers allocates and zeroes an instances of
59 * &struct drm_crtc (possibly as part of a larger structure) and registers it
60 * with a call to drm_crtc_init_with_planes().
61 *
62 * The CRTC is also the entry point for legacy modeset operations, see
63 * &drm_crtc_funcs.set_config, legacy plane operations, see
64 * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy
65 * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these
66 * features are controlled through &drm_property and
67 * &drm_mode_config_funcs.atomic_check and &drm_mode_config_funcs.atomic_check.
68 */
69
70/**
71 * drm_crtc_from_index - find the registered CRTC at an index
72 * @dev: DRM device
73 * @idx: index of registered CRTC to find for
74 *
75 * Given a CRTC index, return the registered CRTC from DRM device's
76 * list of CRTCs with matching index. This is the inverse of drm_crtc_index().
77 * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or
78 * &drm_driver.disable_vblank), since that still deals with indices instead
79 * of pointers to &struct drm_crtc."
80 */
81struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx)
82{
83 struct drm_crtc *crtc;
84
85 drm_for_each_crtc(crtc, dev)
86 if (idx == crtc->index)
87 return crtc;
88
89 return NULL;
90}
91EXPORT_SYMBOL(drm_crtc_from_index);
92
93/**
94 * drm_crtc_force_disable - Forcibly turn off a CRTC
95 * @crtc: CRTC to turn off
96 *
97 * Note: This should only be used by non-atomic legacy drivers.
98 *
99 * Returns:
100 * Zero on success, error code on failure.
101 */
102int 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}
112EXPORT_SYMBOL(drm_crtc_force_disable);
113
114/**
115 * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs
116 * @dev: DRM device whose CRTCs to turn off
117 *
118 * Drivers may want to call this on unload to ensure that all displays are
119 * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
120 *
121 * Note: This should only be used by non-atomic legacy drivers. For an atomic
122 * version look at drm_atomic_helper_shutdown().
123 *
124 * Returns:
125 * Zero on success, error code on failure.
126 */
127int drm_crtc_force_disable_all(struct drm_device *dev)
128{
129 struct drm_crtc *crtc;
130 int ret = 0;
131
132 drm_modeset_lock_all(dev);
133 drm_for_each_crtc(crtc, dev)
134 if (crtc->enabled) {
135 ret = drm_crtc_force_disable(crtc);
136 if (ret)
137 goto out;
138 }
139out:
140 drm_modeset_unlock_all(dev);
141 return ret;
142}
143EXPORT_SYMBOL(drm_crtc_force_disable_all);
144
145static unsigned int drm_num_crtcs(struct drm_device *dev)
146{
147 unsigned int num = 0;
148 struct drm_crtc *tmp;
149
150 drm_for_each_crtc(tmp, dev) {
151 num++;
152 }
153
154 return num;
155}
156
157int drm_crtc_register_all(struct drm_device *dev)
158{
159 struct drm_crtc *crtc;
160 int ret = 0;
161
162 drm_for_each_crtc(crtc, dev) {
163 if (drm_debugfs_crtc_add(crtc))
164 DRM_ERROR("Failed to initialize debugfs entry for CRTC '%s'.\n",
165 crtc->name);
166
167 if (crtc->funcs->late_register)
168 ret = crtc->funcs->late_register(crtc);
169 if (ret)
170 return ret;
171 }
172
173 return 0;
174}
175
176void drm_crtc_unregister_all(struct drm_device *dev)
177{
178 struct drm_crtc *crtc;
179
180 drm_for_each_crtc(crtc, dev) {
181 if (crtc->funcs->early_unregister)
182 crtc->funcs->early_unregister(crtc);
183 drm_debugfs_crtc_remove(crtc);
184 }
185}
186
187static int drm_crtc_crc_init(struct drm_crtc *crtc)
188{
189#ifdef CONFIG_DEBUG_FS
190 spin_lock_init(&crtc->crc.lock);
191 init_waitqueue_head(&crtc->crc.wq);
192 crtc->crc.source = kstrdup("auto", GFP_KERNEL);
193 if (!crtc->crc.source)
194 return -ENOMEM;
195#endif
196 return 0;
197}
198
199static void drm_crtc_crc_fini(struct drm_crtc *crtc)
200{
201#ifdef CONFIG_DEBUG_FS
202 kfree(crtc->crc.source);
203#endif
204}
205
206static const struct dma_fence_ops drm_crtc_fence_ops;
207
208static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
209{
210 BUG_ON(fence->ops != &drm_crtc_fence_ops);
211 return container_of(fence->lock, struct drm_crtc, fence_lock);
212}
213
214static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
215{
216 struct drm_crtc *crtc = fence_to_crtc(fence);
217
218 return crtc->dev->driver->name;
219}
220
221static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
222{
223 struct drm_crtc *crtc = fence_to_crtc(fence);
224
225 return crtc->timeline_name;
226}
227
228static bool drm_crtc_fence_enable_signaling(struct dma_fence *fence)
229{
230 return true;
231}
232
233static const struct dma_fence_ops drm_crtc_fence_ops = {
234 .get_driver_name = drm_crtc_fence_get_driver_name,
235 .get_timeline_name = drm_crtc_fence_get_timeline_name,
236 .enable_signaling = drm_crtc_fence_enable_signaling,
237 .wait = dma_fence_default_wait,
238};
239
240struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
241{
242 struct dma_fence *fence;
243
244 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
245 if (!fence)
246 return NULL;
247
248 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
249 crtc->fence_context, ++crtc->fence_seqno);
250
251 return fence;
252}
253
254/**
255 * drm_crtc_init_with_planes - Initialise a new CRTC object with
256 * specified primary and cursor planes.
257 * @dev: DRM device
258 * @crtc: CRTC object to init
259 * @primary: Primary plane for CRTC
260 * @cursor: Cursor plane for CRTC
261 * @funcs: callbacks for the new CRTC
262 * @name: printf style format string for the CRTC name, or NULL for default name
263 *
264 * Inits a new object created as base part of a driver crtc object. Drivers
265 * should use this function instead of drm_crtc_init(), which is only provided
266 * for backwards compatibility with drivers which do not yet support universal
267 * planes). For really simple hardware which has only 1 plane look at
268 * drm_simple_display_pipe_init() instead.
269 *
270 * Returns:
271 * Zero on success, error code on failure.
272 */
273int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
274 struct drm_plane *primary,
275 struct drm_plane *cursor,
276 const struct drm_crtc_funcs *funcs,
277 const char *name, ...)
278{
279 struct drm_mode_config *config = &dev->mode_config;
280 int ret;
281
282 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
283 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
284
285 /* crtc index is used with 32bit bitmasks */
286 if (WARN_ON(config->num_crtc >= 32))
287 return -EINVAL;
288
289 crtc->dev = dev;
290 crtc->funcs = funcs;
291
292 INIT_LIST_HEAD(&crtc->commit_list);
293 spin_lock_init(&crtc->commit_lock);
294
295 drm_modeset_lock_init(&crtc->mutex);
296 ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
297 if (ret)
298 return ret;
299
300 if (name) {
301 va_list ap;
302
303 va_start(ap, name);
304 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
305 va_end(ap);
306 } else {
307 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
308 drm_num_crtcs(dev));
309 }
310 if (!crtc->name) {
311 drm_mode_object_unregister(dev, &crtc->base);
312 return -ENOMEM;
313 }
314
315 crtc->fence_context = dma_fence_context_alloc(1);
316 spin_lock_init(&crtc->fence_lock);
317 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
318 "CRTC:%d-%s", crtc->base.id, crtc->name);
319
320 crtc->base.properties = &crtc->properties;
321
322 list_add_tail(&crtc->head, &config->crtc_list);
323 crtc->index = config->num_crtc++;
324
325 crtc->primary = primary;
326 crtc->cursor = cursor;
327 if (primary && !primary->possible_crtcs)
328 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
329 if (cursor && !cursor->possible_crtcs)
330 cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
331
332 ret = drm_crtc_crc_init(crtc);
333 if (ret) {
334 drm_mode_object_unregister(dev, &crtc->base);
335 return ret;
336 }
337
338 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
339 drm_object_attach_property(&crtc->base, config->prop_active, 0);
340 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
341 drm_object_attach_property(&crtc->base,
342 config->prop_out_fence_ptr, 0);
343 }
344
345 return 0;
346}
347EXPORT_SYMBOL(drm_crtc_init_with_planes);
348
349/**
350 * drm_crtc_cleanup - Clean up the core crtc usage
351 * @crtc: CRTC to cleanup
352 *
353 * This function cleans up @crtc and removes it from the DRM mode setting
354 * core. Note that the function does *not* free the crtc structure itself,
355 * this is the responsibility of the caller.
356 */
357void drm_crtc_cleanup(struct drm_crtc *crtc)
358{
359 struct drm_device *dev = crtc->dev;
360
361 /* Note that the crtc_list is considered to be static; should we
362 * remove the drm_crtc at runtime we would have to decrement all
363 * the indices on the drm_crtc after us in the crtc_list.
364 */
365
366 drm_crtc_crc_fini(crtc);
367
368 kfree(crtc->gamma_store);
369 crtc->gamma_store = NULL;
370
371 drm_modeset_lock_fini(&crtc->mutex);
372
373 drm_mode_object_unregister(dev, &crtc->base);
374 list_del(&crtc->head);
375 dev->mode_config.num_crtc--;
376
377 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
378 if (crtc->state && crtc->funcs->atomic_destroy_state)
379 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
380
381 kfree(crtc->name);
382
383 memset(crtc, 0, sizeof(*crtc));
384}
385EXPORT_SYMBOL(drm_crtc_cleanup);
386
387/**
388 * drm_mode_getcrtc - get CRTC configuration
389 * @dev: drm device for the ioctl
390 * @data: data pointer for the ioctl
391 * @file_priv: drm file for the ioctl call
392 *
393 * Construct a CRTC configuration structure to return to the user.
394 *
395 * Called by the user via ioctl.
396 *
397 * Returns:
398 * Zero on success, negative errno on failure.
399 */
400int drm_mode_getcrtc(struct drm_device *dev,
401 void *data, struct drm_file *file_priv)
402{
403 struct drm_mode_crtc *crtc_resp = data;
404 struct drm_crtc *crtc;
405
406 if (!drm_core_check_feature(dev, DRIVER_MODESET))
407 return -EINVAL;
408
409 crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
410 if (!crtc)
411 return -ENOENT;
412
413 crtc_resp->gamma_size = crtc->gamma_size;
414
415 drm_modeset_lock(&crtc->primary->mutex, NULL);
416 if (crtc->primary->state && crtc->primary->state->fb)
417 crtc_resp->fb_id = crtc->primary->state->fb->base.id;
418 else if (!crtc->primary->state && crtc->primary->fb)
419 crtc_resp->fb_id = crtc->primary->fb->base.id;
420 else
421 crtc_resp->fb_id = 0;
422
423 if (crtc->primary->state) {
424 crtc_resp->x = crtc->primary->state->src_x >> 16;
425 crtc_resp->y = crtc->primary->state->src_y >> 16;
426 }
427 drm_modeset_unlock(&crtc->primary->mutex);
428
429 drm_modeset_lock(&crtc->mutex, NULL);
430 if (crtc->state) {
431 if (crtc->state->enable) {
432 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
433 crtc_resp->mode_valid = 1;
434
435 } else {
436 crtc_resp->mode_valid = 0;
437 }
438 } else {
439 crtc_resp->x = crtc->x;
440 crtc_resp->y = crtc->y;
441 if (crtc->enabled) {
442 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
443 crtc_resp->mode_valid = 1;
444
445 } else {
446 crtc_resp->mode_valid = 0;
447 }
448 }
449 drm_modeset_unlock(&crtc->mutex);
450
451 return 0;
452}
453
454static int __drm_mode_set_config_internal(struct drm_mode_set *set,
455 struct drm_modeset_acquire_ctx *ctx)
456{
457 struct drm_crtc *crtc = set->crtc;
458 struct drm_framebuffer *fb;
459 struct drm_crtc *tmp;
460 int ret;
461
462 /*
463 * NOTE: ->set_config can also disable other crtcs (if we steal all
464 * connectors from it), hence we need to refcount the fbs across all
465 * crtcs. Atomic modeset will have saner semantics ...
466 */
467 drm_for_each_crtc(tmp, crtc->dev)
468 tmp->primary->old_fb = tmp->primary->fb;
469
470 fb = set->fb;
471
472 ret = crtc->funcs->set_config(set, ctx);
473 if (ret == 0) {
474 crtc->primary->crtc = crtc;
475 crtc->primary->fb = fb;
476 }
477
478 drm_for_each_crtc(tmp, crtc->dev) {
479 if (tmp->primary->fb)
480 drm_framebuffer_get(tmp->primary->fb);
481 if (tmp->primary->old_fb)
482 drm_framebuffer_put(tmp->primary->old_fb);
483 tmp->primary->old_fb = NULL;
484 }
485
486 return ret;
487}
488/**
489 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
490 * @set: modeset config to set
491 *
492 * This is a little helper to wrap internal calls to the
493 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
494 * correct refcounting dance.
495 *
496 * This should only be used by non-atomic legacy drivers.
497 *
498 * Returns:
499 * Zero on success, negative errno on failure.
500 */
501int drm_mode_set_config_internal(struct drm_mode_set *set)
502{
503 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
504
505 return __drm_mode_set_config_internal(set, NULL);
506}
507EXPORT_SYMBOL(drm_mode_set_config_internal);
508
509/**
510 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
511 * CRTC viewport
512 * @crtc: CRTC that framebuffer will be displayed on
513 * @x: x panning
514 * @y: y panning
515 * @mode: mode that framebuffer will be displayed under
516 * @fb: framebuffer to check size of
517 */
518int drm_crtc_check_viewport(const struct drm_crtc *crtc,
519 int x, int y,
520 const struct drm_display_mode *mode,
521 const struct drm_framebuffer *fb)
522
523{
524 int hdisplay, vdisplay;
525
526 drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay);
527
528 if (crtc->state &&
529 drm_rotation_90_or_270(crtc->primary->state->rotation))
530 swap(hdisplay, vdisplay);
531
532 return drm_framebuffer_check_src_coords(x << 16, y << 16,
533 hdisplay << 16, vdisplay << 16,
534 fb);
535}
536EXPORT_SYMBOL(drm_crtc_check_viewport);
537
538/**
539 * drm_mode_setcrtc - set CRTC configuration
540 * @dev: drm device for the ioctl
541 * @data: data pointer for the ioctl
542 * @file_priv: drm file for the ioctl call
543 *
544 * Build a new CRTC configuration based on user request.
545 *
546 * Called by the user via ioctl.
547 *
548 * Returns:
549 * Zero on success, negative errno on failure.
550 */
551int drm_mode_setcrtc(struct drm_device *dev, void *data,
552 struct drm_file *file_priv)
553{
554 struct drm_mode_config *config = &dev->mode_config;
555 struct drm_mode_crtc *crtc_req = data;
556 struct drm_crtc *crtc;
557 struct drm_connector **connector_set = NULL, *connector;
558 struct drm_framebuffer *fb = NULL;
559 struct drm_display_mode *mode = NULL;
560 struct drm_mode_set set;
561 uint32_t __user *set_connectors_ptr;
562 struct drm_modeset_acquire_ctx ctx;
563 int ret;
564 int i;
565
566 if (!drm_core_check_feature(dev, DRIVER_MODESET))
567 return -EINVAL;
568
569 /*
570 * Universal plane src offsets are only 16.16, prevent havoc for
571 * drivers using universal plane code internally.
572 */
573 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
574 return -ERANGE;
575
576 crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
577 if (!crtc) {
578 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
579 return -ENOENT;
580 }
581 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
582
583 mutex_lock(&crtc->dev->mode_config.mutex);
584 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
585retry:
586 ret = drm_modeset_lock_all_ctx(crtc->dev, &ctx);
587 if (ret)
588 goto out;
589 if (crtc_req->mode_valid) {
590 /* If we have a mode we need a framebuffer. */
591 /* If we pass -1, set the mode with the currently bound fb */
592 if (crtc_req->fb_id == -1) {
593 if (!crtc->primary->fb) {
594 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
595 ret = -EINVAL;
596 goto out;
597 }
598 fb = crtc->primary->fb;
599 /* Make refcounting symmetric with the lookup path. */
600 drm_framebuffer_get(fb);
601 } else {
602 fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
603 if (!fb) {
604 DRM_DEBUG_KMS("Unknown FB ID%d\n",
605 crtc_req->fb_id);
606 ret = -ENOENT;
607 goto out;
608 }
609 }
610
611 mode = drm_mode_create(dev);
612 if (!mode) {
613 ret = -ENOMEM;
614 goto out;
615 }
616
617 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
618 if (ret) {
619 DRM_DEBUG_KMS("Invalid mode\n");
620 goto out;
621 }
622
623 /*
624 * Check whether the primary plane supports the fb pixel format.
625 * Drivers not implementing the universal planes API use a
626 * default formats list provided by the DRM core which doesn't
627 * match real hardware capabilities. Skip the check in that
628 * case.
629 */
630 if (!crtc->primary->format_default) {
631 ret = drm_plane_check_pixel_format(crtc->primary,
632 fb->format->format,
633 fb->modifier);
634 if (ret) {
635 struct drm_format_name_buf format_name;
636 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
637 drm_get_format_name(fb->format->format,
638 &format_name),
639 fb->modifier);
640 goto out;
641 }
642 }
643
644 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
645 mode, fb);
646 if (ret)
647 goto out;
648
649 }
650
651 if (crtc_req->count_connectors == 0 && mode) {
652 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
653 ret = -EINVAL;
654 goto out;
655 }
656
657 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
658 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
659 crtc_req->count_connectors);
660 ret = -EINVAL;
661 goto out;
662 }
663
664 if (crtc_req->count_connectors > 0) {
665 u32 out_id;
666
667 /* Avoid unbounded kernel memory allocation */
668 if (crtc_req->count_connectors > config->num_connector) {
669 ret = -EINVAL;
670 goto out;
671 }
672
673 connector_set = kmalloc_array(crtc_req->count_connectors,
674 sizeof(struct drm_connector *),
675 GFP_KERNEL);
676 if (!connector_set) {
677 ret = -ENOMEM;
678 goto out;
679 }
680
681 for (i = 0; i < crtc_req->count_connectors; i++) {
682 connector_set[i] = NULL;
683 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
684 if (get_user(out_id, &set_connectors_ptr[i])) {
685 ret = -EFAULT;
686 goto out;
687 }
688
689 connector = drm_connector_lookup(dev, file_priv, out_id);
690 if (!connector) {
691 DRM_DEBUG_KMS("Connector id %d unknown\n",
692 out_id);
693 ret = -ENOENT;
694 goto out;
695 }
696 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
697 connector->base.id,
698 connector->name);
699
700 connector_set[i] = connector;
701 }
702 }
703
704 set.crtc = crtc;
705 set.x = crtc_req->x;
706 set.y = crtc_req->y;
707 set.mode = mode;
708 set.connectors = connector_set;
709 set.num_connectors = crtc_req->count_connectors;
710 set.fb = fb;
711 ret = __drm_mode_set_config_internal(&set, &ctx);
712
713out:
714 if (fb)
715 drm_framebuffer_put(fb);
716
717 if (connector_set) {
718 for (i = 0; i < crtc_req->count_connectors; i++) {
719 if (connector_set[i])
720 drm_connector_put(connector_set[i]);
721 }
722 }
723 kfree(connector_set);
724 drm_mode_destroy(dev, mode);
725 if (ret == -EDEADLK) {
726 ret = drm_modeset_backoff(&ctx);
727 if (!ret)
728 goto retry;
729 }
730 drm_modeset_drop_locks(&ctx);
731 drm_modeset_acquire_fini(&ctx);
732 mutex_unlock(&crtc->dev->mode_config.mutex);
733
734 return ret;
735}
736
737int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
738 struct drm_property *property,
739 uint64_t value)
740{
741 int ret = -EINVAL;
742 struct drm_crtc *crtc = obj_to_crtc(obj);
743
744 if (crtc->funcs->set_property)
745 ret = crtc->funcs->set_property(crtc, property, value);
746 if (!ret)
747 drm_object_property_set_value(obj, property, value);
748
749 return ret;
750}