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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_blend.h>
39#include <drm/drm_crtc.h>
40#include <drm/drm_edid.h>
41#include <drm/drm_fourcc.h>
42#include <drm/drm_framebuffer.h>
43#include <drm/drm_managed.h>
44#include <drm/drm_modeset_lock.h>
45#include <drm/drm_atomic.h>
46#include <drm/drm_auth.h>
47#include <drm/drm_debugfs_crc.h>
48#include <drm/drm_drv.h>
49#include <drm/drm_print.h>
50#include <drm/drm_file.h>
51
52#include "drm_crtc_internal.h"
53#include "drm_internal.h"
54
55/**
56 * DOC: overview
57 *
58 * A CRTC represents the overall display pipeline. It receives pixel data from
59 * &drm_plane and blends them together. The &drm_display_mode is also attached
60 * to the CRTC, specifying display timings. On the output side the data is fed
61 * to one or more &drm_encoder, which are then each connected to one
62 * &drm_connector.
63 *
64 * To create a CRTC, a KMS drivers allocates and zeroes an instances of
65 * &struct drm_crtc (possibly as part of a larger structure) and registers it
66 * with a call to drm_crtc_init_with_planes().
67 *
68 * The CRTC is also the entry point for legacy modeset operations, see
69 * &drm_crtc_funcs.set_config, legacy plane operations, see
70 * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy
71 * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these
72 * features are controlled through &drm_property and
73 * &drm_mode_config_funcs.atomic_check.
74 */
75
76/**
77 * drm_crtc_from_index - find the registered CRTC at an index
78 * @dev: DRM device
79 * @idx: index of registered CRTC to find for
80 *
81 * Given a CRTC index, return the registered CRTC from DRM device's
82 * list of CRTCs with matching index. This is the inverse of drm_crtc_index().
83 * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or
84 * &drm_driver.disable_vblank), since that still deals with indices instead
85 * of pointers to &struct drm_crtc."
86 */
87struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx)
88{
89 struct drm_crtc *crtc;
90
91 drm_for_each_crtc(crtc, dev)
92 if (idx == crtc->index)
93 return crtc;
94
95 return NULL;
96}
97EXPORT_SYMBOL(drm_crtc_from_index);
98
99int drm_crtc_force_disable(struct drm_crtc *crtc)
100{
101 struct drm_mode_set set = {
102 .crtc = crtc,
103 };
104
105 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
106
107 return drm_mode_set_config_internal(&set);
108}
109
110static unsigned int drm_num_crtcs(struct drm_device *dev)
111{
112 unsigned int num = 0;
113 struct drm_crtc *tmp;
114
115 drm_for_each_crtc(tmp, dev) {
116 num++;
117 }
118
119 return num;
120}
121
122int drm_crtc_register_all(struct drm_device *dev)
123{
124 struct drm_crtc *crtc;
125 int ret = 0;
126
127 drm_for_each_crtc(crtc, dev) {
128 drm_debugfs_crtc_add(crtc);
129
130 if (crtc->funcs->late_register)
131 ret = crtc->funcs->late_register(crtc);
132 if (ret)
133 return ret;
134 }
135
136 return 0;
137}
138
139void drm_crtc_unregister_all(struct drm_device *dev)
140{
141 struct drm_crtc *crtc;
142
143 drm_for_each_crtc(crtc, dev) {
144 if (crtc->funcs->early_unregister)
145 crtc->funcs->early_unregister(crtc);
146 drm_debugfs_crtc_remove(crtc);
147 }
148}
149
150static int drm_crtc_crc_init(struct drm_crtc *crtc)
151{
152#ifdef CONFIG_DEBUG_FS
153 spin_lock_init(&crtc->crc.lock);
154 init_waitqueue_head(&crtc->crc.wq);
155 crtc->crc.source = kstrdup("auto", GFP_KERNEL);
156 if (!crtc->crc.source)
157 return -ENOMEM;
158#endif
159 return 0;
160}
161
162static void drm_crtc_crc_fini(struct drm_crtc *crtc)
163{
164#ifdef CONFIG_DEBUG_FS
165 kfree(crtc->crc.source);
166#endif
167}
168
169static const struct dma_fence_ops drm_crtc_fence_ops;
170
171static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
172{
173 BUG_ON(fence->ops != &drm_crtc_fence_ops);
174 return container_of(fence->lock, struct drm_crtc, fence_lock);
175}
176
177static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
178{
179 struct drm_crtc *crtc = fence_to_crtc(fence);
180
181 return crtc->dev->driver->name;
182}
183
184static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
185{
186 struct drm_crtc *crtc = fence_to_crtc(fence);
187
188 return crtc->timeline_name;
189}
190
191static const struct dma_fence_ops drm_crtc_fence_ops = {
192 .get_driver_name = drm_crtc_fence_get_driver_name,
193 .get_timeline_name = drm_crtc_fence_get_timeline_name,
194};
195
196struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
197{
198 struct dma_fence *fence;
199
200 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
201 if (!fence)
202 return NULL;
203
204 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
205 crtc->fence_context, ++crtc->fence_seqno);
206
207 return fence;
208}
209
210/**
211 * DOC: standard CRTC properties
212 *
213 * DRM CRTCs have a few standardized properties:
214 *
215 * ACTIVE:
216 * Atomic property for setting the power state of the CRTC. When set to 1
217 * the CRTC will actively display content. When set to 0 the CRTC will be
218 * powered off. There is no expectation that user-space will reset CRTC
219 * resources like the mode and planes when setting ACTIVE to 0.
220 *
221 * User-space can rely on an ACTIVE change to 1 to never fail an atomic
222 * test as long as no other property has changed. If a change to ACTIVE
223 * fails an atomic test, this is a driver bug. For this reason setting
224 * ACTIVE to 0 must not release internal resources (like reserved memory
225 * bandwidth or clock generators).
226 *
227 * Note that the legacy DPMS property on connectors is internally routed
228 * to control this property for atomic drivers.
229 * MODE_ID:
230 * Atomic property for setting the CRTC display timings. The value is the
231 * ID of a blob containing the DRM mode info. To disable the CRTC,
232 * user-space must set this property to 0.
233 *
234 * Setting MODE_ID to 0 will release reserved resources for the CRTC.
235 * SCALING_FILTER:
236 * Atomic property for setting the scaling filter for CRTC scaler
237 *
238 * The value of this property can be one of the following:
239 *
240 * Default:
241 * Driver's default scaling filter
242 * Nearest Neighbor:
243 * Nearest Neighbor scaling filter
244 */
245
246__printf(6, 0)
247static int __drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
248 struct drm_plane *primary,
249 struct drm_plane *cursor,
250 const struct drm_crtc_funcs *funcs,
251 const char *name, va_list ap)
252{
253 struct drm_mode_config *config = &dev->mode_config;
254 int ret;
255
256 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
257 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
258
259 /* crtc index is used with 32bit bitmasks */
260 if (WARN_ON(config->num_crtc >= 32))
261 return -EINVAL;
262
263 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
264 (!funcs->atomic_destroy_state ||
265 !funcs->atomic_duplicate_state));
266
267 crtc->dev = dev;
268 crtc->funcs = funcs;
269
270 INIT_LIST_HEAD(&crtc->commit_list);
271 spin_lock_init(&crtc->commit_lock);
272
273 drm_modeset_lock_init(&crtc->mutex);
274 ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
275 if (ret)
276 return ret;
277
278 if (name) {
279 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
280 } else {
281 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
282 drm_num_crtcs(dev));
283 }
284 if (!crtc->name) {
285 drm_mode_object_unregister(dev, &crtc->base);
286 return -ENOMEM;
287 }
288
289 crtc->fence_context = dma_fence_context_alloc(1);
290 spin_lock_init(&crtc->fence_lock);
291 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
292 "CRTC:%d-%s", crtc->base.id, crtc->name);
293
294 crtc->base.properties = &crtc->properties;
295
296 list_add_tail(&crtc->head, &config->crtc_list);
297 crtc->index = config->num_crtc++;
298
299 crtc->primary = primary;
300 crtc->cursor = cursor;
301 if (primary && !primary->possible_crtcs)
302 primary->possible_crtcs = drm_crtc_mask(crtc);
303 if (cursor && !cursor->possible_crtcs)
304 cursor->possible_crtcs = drm_crtc_mask(crtc);
305
306 ret = drm_crtc_crc_init(crtc);
307 if (ret) {
308 drm_mode_object_unregister(dev, &crtc->base);
309 return ret;
310 }
311
312 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
313 drm_object_attach_property(&crtc->base, config->prop_active, 0);
314 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
315 drm_object_attach_property(&crtc->base,
316 config->prop_out_fence_ptr, 0);
317 drm_object_attach_property(&crtc->base,
318 config->prop_vrr_enabled, 0);
319 }
320
321 return 0;
322}
323
324/**
325 * drm_crtc_init_with_planes - Initialise a new CRTC object with
326 * specified primary and cursor planes.
327 * @dev: DRM device
328 * @crtc: CRTC object to init
329 * @primary: Primary plane for CRTC
330 * @cursor: Cursor plane for CRTC
331 * @funcs: callbacks for the new CRTC
332 * @name: printf style format string for the CRTC name, or NULL for default name
333 *
334 * Inits a new object created as base part of a driver crtc object. Drivers
335 * should use this function instead of drm_crtc_init(), which is only provided
336 * for backwards compatibility with drivers which do not yet support universal
337 * planes). For really simple hardware which has only 1 plane look at
338 * drm_simple_display_pipe_init() instead.
339 * The &drm_crtc_funcs.destroy hook should call drm_crtc_cleanup() and kfree()
340 * the crtc structure. The crtc structure should not be allocated with
341 * devm_kzalloc().
342 *
343 * The @primary and @cursor planes are only relevant for legacy uAPI, see
344 * &drm_crtc.primary and &drm_crtc.cursor.
345 *
346 * Note: consider using drmm_crtc_alloc_with_planes() or
347 * drmm_crtc_init_with_planes() instead of drm_crtc_init_with_planes()
348 * to let the DRM managed resource infrastructure take care of cleanup
349 * and deallocation.
350 *
351 * Returns:
352 * Zero on success, error code on failure.
353 */
354int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
355 struct drm_plane *primary,
356 struct drm_plane *cursor,
357 const struct drm_crtc_funcs *funcs,
358 const char *name, ...)
359{
360 va_list ap;
361 int ret;
362
363 WARN_ON(!funcs->destroy);
364
365 va_start(ap, name);
366 ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
367 name, ap);
368 va_end(ap);
369
370 return ret;
371}
372EXPORT_SYMBOL(drm_crtc_init_with_planes);
373
374static void drmm_crtc_init_with_planes_cleanup(struct drm_device *dev,
375 void *ptr)
376{
377 struct drm_crtc *crtc = ptr;
378
379 drm_crtc_cleanup(crtc);
380}
381
382__printf(6, 0)
383static int __drmm_crtc_init_with_planes(struct drm_device *dev,
384 struct drm_crtc *crtc,
385 struct drm_plane *primary,
386 struct drm_plane *cursor,
387 const struct drm_crtc_funcs *funcs,
388 const char *name,
389 va_list args)
390{
391 int ret;
392
393 drm_WARN_ON(dev, funcs && funcs->destroy);
394
395 ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
396 name, args);
397 if (ret)
398 return ret;
399
400 ret = drmm_add_action_or_reset(dev, drmm_crtc_init_with_planes_cleanup,
401 crtc);
402 if (ret)
403 return ret;
404
405 return 0;
406}
407
408/**
409 * drmm_crtc_init_with_planes - Initialise a new CRTC object with
410 * specified primary and cursor planes.
411 * @dev: DRM device
412 * @crtc: CRTC object to init
413 * @primary: Primary plane for CRTC
414 * @cursor: Cursor plane for CRTC
415 * @funcs: callbacks for the new CRTC
416 * @name: printf style format string for the CRTC name, or NULL for default name
417 *
418 * Inits a new object created as base part of a driver crtc object. Drivers
419 * should use this function instead of drm_crtc_init(), which is only provided
420 * for backwards compatibility with drivers which do not yet support universal
421 * planes). For really simple hardware which has only 1 plane look at
422 * drm_simple_display_pipe_init() instead.
423 *
424 * Cleanup is automatically handled through registering
425 * drmm_crtc_cleanup() with drmm_add_action(). The crtc structure should
426 * be allocated with drmm_kzalloc().
427 *
428 * The @drm_crtc_funcs.destroy hook must be NULL.
429 *
430 * The @primary and @cursor planes are only relevant for legacy uAPI, see
431 * &drm_crtc.primary and &drm_crtc.cursor.
432 *
433 * Returns:
434 * Zero on success, error code on failure.
435 */
436int drmm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
437 struct drm_plane *primary,
438 struct drm_plane *cursor,
439 const struct drm_crtc_funcs *funcs,
440 const char *name, ...)
441{
442 va_list ap;
443 int ret;
444
445 va_start(ap, name);
446 ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
447 name, ap);
448 va_end(ap);
449 if (ret)
450 return ret;
451
452 return 0;
453}
454EXPORT_SYMBOL(drmm_crtc_init_with_planes);
455
456void *__drmm_crtc_alloc_with_planes(struct drm_device *dev,
457 size_t size, size_t offset,
458 struct drm_plane *primary,
459 struct drm_plane *cursor,
460 const struct drm_crtc_funcs *funcs,
461 const char *name, ...)
462{
463 void *container;
464 struct drm_crtc *crtc;
465 va_list ap;
466 int ret;
467
468 if (WARN_ON(!funcs || funcs->destroy))
469 return ERR_PTR(-EINVAL);
470
471 container = drmm_kzalloc(dev, size, GFP_KERNEL);
472 if (!container)
473 return ERR_PTR(-ENOMEM);
474
475 crtc = container + offset;
476
477 va_start(ap, name);
478 ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
479 name, ap);
480 va_end(ap);
481 if (ret)
482 return ERR_PTR(ret);
483
484 return container;
485}
486EXPORT_SYMBOL(__drmm_crtc_alloc_with_planes);
487
488/**
489 * drm_crtc_cleanup - Clean up the core crtc usage
490 * @crtc: CRTC to cleanup
491 *
492 * This function cleans up @crtc and removes it from the DRM mode setting
493 * core. Note that the function does *not* free the crtc structure itself,
494 * this is the responsibility of the caller.
495 */
496void drm_crtc_cleanup(struct drm_crtc *crtc)
497{
498 struct drm_device *dev = crtc->dev;
499
500 /* Note that the crtc_list is considered to be static; should we
501 * remove the drm_crtc at runtime we would have to decrement all
502 * the indices on the drm_crtc after us in the crtc_list.
503 */
504
505 drm_crtc_crc_fini(crtc);
506
507 kfree(crtc->gamma_store);
508 crtc->gamma_store = NULL;
509
510 drm_modeset_lock_fini(&crtc->mutex);
511
512 drm_mode_object_unregister(dev, &crtc->base);
513 list_del(&crtc->head);
514 dev->mode_config.num_crtc--;
515
516 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
517 if (crtc->state && crtc->funcs->atomic_destroy_state)
518 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
519
520 kfree(crtc->name);
521
522 memset(crtc, 0, sizeof(*crtc));
523}
524EXPORT_SYMBOL(drm_crtc_cleanup);
525
526/**
527 * drm_mode_getcrtc - get CRTC configuration
528 * @dev: drm device for the ioctl
529 * @data: data pointer for the ioctl
530 * @file_priv: drm file for the ioctl call
531 *
532 * Construct a CRTC configuration structure to return to the user.
533 *
534 * Called by the user via ioctl.
535 *
536 * Returns:
537 * Zero on success, negative errno on failure.
538 */
539int drm_mode_getcrtc(struct drm_device *dev,
540 void *data, struct drm_file *file_priv)
541{
542 struct drm_mode_crtc *crtc_resp = data;
543 struct drm_crtc *crtc;
544 struct drm_plane *plane;
545
546 if (!drm_core_check_feature(dev, DRIVER_MODESET))
547 return -EOPNOTSUPP;
548
549 crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
550 if (!crtc)
551 return -ENOENT;
552
553 plane = crtc->primary;
554
555 crtc_resp->gamma_size = crtc->gamma_size;
556
557 drm_modeset_lock(&plane->mutex, NULL);
558 if (plane->state && plane->state->fb)
559 crtc_resp->fb_id = plane->state->fb->base.id;
560 else if (!plane->state && plane->fb)
561 crtc_resp->fb_id = plane->fb->base.id;
562 else
563 crtc_resp->fb_id = 0;
564
565 if (plane->state) {
566 crtc_resp->x = plane->state->src_x >> 16;
567 crtc_resp->y = plane->state->src_y >> 16;
568 }
569 drm_modeset_unlock(&plane->mutex);
570
571 drm_modeset_lock(&crtc->mutex, NULL);
572 if (crtc->state) {
573 if (crtc->state->enable) {
574 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
575 crtc_resp->mode_valid = 1;
576 } else {
577 crtc_resp->mode_valid = 0;
578 }
579 } else {
580 crtc_resp->x = crtc->x;
581 crtc_resp->y = crtc->y;
582
583 if (crtc->enabled) {
584 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
585 crtc_resp->mode_valid = 1;
586
587 } else {
588 crtc_resp->mode_valid = 0;
589 }
590 }
591 if (!file_priv->aspect_ratio_allowed)
592 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
593 drm_modeset_unlock(&crtc->mutex);
594
595 return 0;
596}
597
598static int __drm_mode_set_config_internal(struct drm_mode_set *set,
599 struct drm_modeset_acquire_ctx *ctx)
600{
601 struct drm_crtc *crtc = set->crtc;
602 struct drm_framebuffer *fb;
603 struct drm_crtc *tmp;
604 int ret;
605
606 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
607
608 /*
609 * NOTE: ->set_config can also disable other crtcs (if we steal all
610 * connectors from it), hence we need to refcount the fbs across all
611 * crtcs. Atomic modeset will have saner semantics ...
612 */
613 drm_for_each_crtc(tmp, crtc->dev) {
614 struct drm_plane *plane = tmp->primary;
615
616 plane->old_fb = plane->fb;
617 }
618
619 fb = set->fb;
620
621 ret = crtc->funcs->set_config(set, ctx);
622 if (ret == 0) {
623 struct drm_plane *plane = crtc->primary;
624
625 plane->crtc = fb ? crtc : NULL;
626 plane->fb = fb;
627 }
628
629 drm_for_each_crtc(tmp, crtc->dev) {
630 struct drm_plane *plane = tmp->primary;
631
632 if (plane->fb)
633 drm_framebuffer_get(plane->fb);
634 if (plane->old_fb)
635 drm_framebuffer_put(plane->old_fb);
636 plane->old_fb = NULL;
637 }
638
639 return ret;
640}
641
642/**
643 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
644 * @set: modeset config to set
645 *
646 * This is a little helper to wrap internal calls to the
647 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
648 * correct refcounting dance.
649 *
650 * This should only be used by non-atomic legacy drivers.
651 *
652 * Returns:
653 * Zero on success, negative errno on failure.
654 */
655int drm_mode_set_config_internal(struct drm_mode_set *set)
656{
657 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
658
659 return __drm_mode_set_config_internal(set, NULL);
660}
661EXPORT_SYMBOL(drm_mode_set_config_internal);
662
663/**
664 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
665 * CRTC viewport
666 * @crtc: CRTC that framebuffer will be displayed on
667 * @x: x panning
668 * @y: y panning
669 * @mode: mode that framebuffer will be displayed under
670 * @fb: framebuffer to check size of
671 */
672int drm_crtc_check_viewport(const struct drm_crtc *crtc,
673 int x, int y,
674 const struct drm_display_mode *mode,
675 const struct drm_framebuffer *fb)
676
677{
678 int hdisplay, vdisplay;
679
680 drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay);
681
682 if (crtc->state &&
683 drm_rotation_90_or_270(crtc->primary->state->rotation))
684 swap(hdisplay, vdisplay);
685
686 return drm_framebuffer_check_src_coords(x << 16, y << 16,
687 hdisplay << 16, vdisplay << 16,
688 fb);
689}
690EXPORT_SYMBOL(drm_crtc_check_viewport);
691
692/**
693 * drm_mode_setcrtc - set CRTC configuration
694 * @dev: drm device for the ioctl
695 * @data: data pointer for the ioctl
696 * @file_priv: drm file for the ioctl call
697 *
698 * Build a new CRTC configuration based on user request.
699 *
700 * Called by the user via ioctl.
701 *
702 * Returns:
703 * Zero on success, negative errno on failure.
704 */
705int drm_mode_setcrtc(struct drm_device *dev, void *data,
706 struct drm_file *file_priv)
707{
708 struct drm_mode_config *config = &dev->mode_config;
709 struct drm_mode_crtc *crtc_req = data;
710 struct drm_crtc *crtc;
711 struct drm_plane *plane;
712 struct drm_connector **connector_set = NULL, *connector;
713 struct drm_framebuffer *fb = NULL;
714 struct drm_display_mode *mode = NULL;
715 struct drm_mode_set set;
716 uint32_t __user *set_connectors_ptr;
717 struct drm_modeset_acquire_ctx ctx;
718 int ret;
719 int i;
720
721 if (!drm_core_check_feature(dev, DRIVER_MODESET))
722 return -EOPNOTSUPP;
723
724 /*
725 * Universal plane src offsets are only 16.16, prevent havoc for
726 * drivers using universal plane code internally.
727 */
728 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
729 return -ERANGE;
730
731 crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
732 if (!crtc) {
733 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
734 return -ENOENT;
735 }
736 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
737
738 plane = crtc->primary;
739
740 /* allow disabling with the primary plane leased */
741 if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
742 return -EACCES;
743
744 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
745 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
746
747 if (crtc_req->mode_valid) {
748 /* If we have a mode we need a framebuffer. */
749 /* If we pass -1, set the mode with the currently bound fb */
750 if (crtc_req->fb_id == -1) {
751 struct drm_framebuffer *old_fb;
752
753 if (plane->state)
754 old_fb = plane->state->fb;
755 else
756 old_fb = plane->fb;
757
758 if (!old_fb) {
759 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
760 ret = -EINVAL;
761 goto out;
762 }
763
764 fb = old_fb;
765 /* Make refcounting symmetric with the lookup path. */
766 drm_framebuffer_get(fb);
767 } else {
768 fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
769 if (!fb) {
770 DRM_DEBUG_KMS("Unknown FB ID%d\n",
771 crtc_req->fb_id);
772 ret = -ENOENT;
773 goto out;
774 }
775 }
776
777 mode = drm_mode_create(dev);
778 if (!mode) {
779 ret = -ENOMEM;
780 goto out;
781 }
782 if (!file_priv->aspect_ratio_allowed &&
783 (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
784 DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
785 ret = -EINVAL;
786 goto out;
787 }
788
789
790 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
791 if (ret) {
792 DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
793 ret, drm_get_mode_status_name(mode->status));
794 drm_mode_debug_printmodeline(mode);
795 goto out;
796 }
797
798 /*
799 * Check whether the primary plane supports the fb pixel format.
800 * Drivers not implementing the universal planes API use a
801 * default formats list provided by the DRM core which doesn't
802 * match real hardware capabilities. Skip the check in that
803 * case.
804 */
805 if (!plane->format_default) {
806 ret = drm_plane_check_pixel_format(plane,
807 fb->format->format,
808 fb->modifier);
809 if (ret) {
810 DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
811 &fb->format->format,
812 fb->modifier);
813 goto out;
814 }
815 }
816
817 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
818 mode, fb);
819 if (ret)
820 goto out;
821
822 }
823
824 if (crtc_req->count_connectors == 0 && mode) {
825 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
826 ret = -EINVAL;
827 goto out;
828 }
829
830 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
831 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
832 crtc_req->count_connectors);
833 ret = -EINVAL;
834 goto out;
835 }
836
837 if (crtc_req->count_connectors > 0) {
838 u32 out_id;
839
840 /* Avoid unbounded kernel memory allocation */
841 if (crtc_req->count_connectors > config->num_connector) {
842 ret = -EINVAL;
843 goto out;
844 }
845
846 connector_set = kmalloc_array(crtc_req->count_connectors,
847 sizeof(struct drm_connector *),
848 GFP_KERNEL);
849 if (!connector_set) {
850 ret = -ENOMEM;
851 goto out;
852 }
853
854 for (i = 0; i < crtc_req->count_connectors; i++) {
855 connector_set[i] = NULL;
856 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
857 if (get_user(out_id, &set_connectors_ptr[i])) {
858 ret = -EFAULT;
859 goto out;
860 }
861
862 connector = drm_connector_lookup(dev, file_priv, out_id);
863 if (!connector) {
864 DRM_DEBUG_KMS("Connector id %d unknown\n",
865 out_id);
866 ret = -ENOENT;
867 goto out;
868 }
869 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
870 connector->base.id,
871 connector->name);
872
873 connector_set[i] = connector;
874 }
875 }
876
877 set.crtc = crtc;
878 set.x = crtc_req->x;
879 set.y = crtc_req->y;
880 set.mode = mode;
881 set.connectors = connector_set;
882 set.num_connectors = crtc_req->count_connectors;
883 set.fb = fb;
884
885 if (drm_drv_uses_atomic_modeset(dev))
886 ret = crtc->funcs->set_config(&set, &ctx);
887 else
888 ret = __drm_mode_set_config_internal(&set, &ctx);
889
890out:
891 if (fb)
892 drm_framebuffer_put(fb);
893
894 if (connector_set) {
895 for (i = 0; i < crtc_req->count_connectors; i++) {
896 if (connector_set[i])
897 drm_connector_put(connector_set[i]);
898 }
899 }
900 kfree(connector_set);
901 drm_mode_destroy(dev, mode);
902
903 /* In case we need to retry... */
904 connector_set = NULL;
905 fb = NULL;
906 mode = NULL;
907
908 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
909
910 return ret;
911}
912
913int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
914 struct drm_property *property,
915 uint64_t value)
916{
917 int ret = -EINVAL;
918 struct drm_crtc *crtc = obj_to_crtc(obj);
919
920 if (crtc->funcs->set_property)
921 ret = crtc->funcs->set_property(crtc, property, value);
922 if (!ret)
923 drm_object_property_set_value(obj, property, value);
924
925 return ret;
926}
927
928/**
929 * drm_crtc_create_scaling_filter_property - create a new scaling filter
930 * property
931 *
932 * @crtc: drm CRTC
933 * @supported_filters: bitmask of supported scaling filters, must include
934 * BIT(DRM_SCALING_FILTER_DEFAULT).
935 *
936 * This function lets driver to enable the scaling filter property on a given
937 * CRTC.
938 *
939 * RETURNS:
940 * Zero for success or -errno
941 */
942int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc,
943 unsigned int supported_filters)
944{
945 struct drm_property *prop =
946 drm_create_scaling_filter_prop(crtc->dev, supported_filters);
947
948 if (IS_ERR(prop))
949 return PTR_ERR(prop);
950
951 drm_object_attach_property(&crtc->base, prop,
952 DRM_SCALING_FILTER_DEFAULT);
953 crtc->scaling_filter_property = prop;
954
955 return 0;
956}
957EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property);
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 * drm_crtc_force_disable - Forcibly turn off a CRTC
51 * @crtc: CRTC to turn off
52 *
53 * Returns:
54 * Zero on success, error code on failure.
55 */
56int drm_crtc_force_disable(struct drm_crtc *crtc)
57{
58 struct drm_mode_set set = {
59 .crtc = crtc,
60 };
61
62 return drm_mode_set_config_internal(&set);
63}
64EXPORT_SYMBOL(drm_crtc_force_disable);
65
66/**
67 * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs
68 * @dev: DRM device whose CRTCs to turn off
69 *
70 * Drivers may want to call this on unload to ensure that all displays are
71 * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
72 *
73 * Returns:
74 * Zero on success, error code on failure.
75 */
76int drm_crtc_force_disable_all(struct drm_device *dev)
77{
78 struct drm_crtc *crtc;
79 int ret = 0;
80
81 drm_modeset_lock_all(dev);
82 drm_for_each_crtc(crtc, dev)
83 if (crtc->enabled) {
84 ret = drm_crtc_force_disable(crtc);
85 if (ret)
86 goto out;
87 }
88out:
89 drm_modeset_unlock_all(dev);
90 return ret;
91}
92EXPORT_SYMBOL(drm_crtc_force_disable_all);
93
94static unsigned int drm_num_crtcs(struct drm_device *dev)
95{
96 unsigned int num = 0;
97 struct drm_crtc *tmp;
98
99 drm_for_each_crtc(tmp, dev) {
100 num++;
101 }
102
103 return num;
104}
105
106int drm_crtc_register_all(struct drm_device *dev)
107{
108 struct drm_crtc *crtc;
109 int ret = 0;
110
111 drm_for_each_crtc(crtc, dev) {
112 if (drm_debugfs_crtc_add(crtc))
113 DRM_ERROR("Failed to initialize debugfs entry for CRTC '%s'.\n",
114 crtc->name);
115
116 if (crtc->funcs->late_register)
117 ret = crtc->funcs->late_register(crtc);
118 if (ret)
119 return ret;
120 }
121
122 return 0;
123}
124
125void drm_crtc_unregister_all(struct drm_device *dev)
126{
127 struct drm_crtc *crtc;
128
129 drm_for_each_crtc(crtc, dev) {
130 if (crtc->funcs->early_unregister)
131 crtc->funcs->early_unregister(crtc);
132 drm_debugfs_crtc_remove(crtc);
133 }
134}
135
136static int drm_crtc_crc_init(struct drm_crtc *crtc)
137{
138#ifdef CONFIG_DEBUG_FS
139 spin_lock_init(&crtc->crc.lock);
140 init_waitqueue_head(&crtc->crc.wq);
141 crtc->crc.source = kstrdup("auto", GFP_KERNEL);
142 if (!crtc->crc.source)
143 return -ENOMEM;
144#endif
145 return 0;
146}
147
148static void drm_crtc_crc_fini(struct drm_crtc *crtc)
149{
150#ifdef CONFIG_DEBUG_FS
151 kfree(crtc->crc.source);
152#endif
153}
154
155static const struct dma_fence_ops drm_crtc_fence_ops;
156
157static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
158{
159 BUG_ON(fence->ops != &drm_crtc_fence_ops);
160 return container_of(fence->lock, struct drm_crtc, fence_lock);
161}
162
163static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
164{
165 struct drm_crtc *crtc = fence_to_crtc(fence);
166
167 return crtc->dev->driver->name;
168}
169
170static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
171{
172 struct drm_crtc *crtc = fence_to_crtc(fence);
173
174 return crtc->timeline_name;
175}
176
177static bool drm_crtc_fence_enable_signaling(struct dma_fence *fence)
178{
179 return true;
180}
181
182static const struct dma_fence_ops drm_crtc_fence_ops = {
183 .get_driver_name = drm_crtc_fence_get_driver_name,
184 .get_timeline_name = drm_crtc_fence_get_timeline_name,
185 .enable_signaling = drm_crtc_fence_enable_signaling,
186 .wait = dma_fence_default_wait,
187};
188
189struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
190{
191 struct dma_fence *fence;
192
193 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
194 if (!fence)
195 return NULL;
196
197 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
198 crtc->fence_context, ++crtc->fence_seqno);
199
200 return fence;
201}
202
203/**
204 * drm_crtc_init_with_planes - Initialise a new CRTC object with
205 * specified primary and cursor planes.
206 * @dev: DRM device
207 * @crtc: CRTC object to init
208 * @primary: Primary plane for CRTC
209 * @cursor: Cursor plane for CRTC
210 * @funcs: callbacks for the new CRTC
211 * @name: printf style format string for the CRTC name, or NULL for default name
212 *
213 * Inits a new object created as base part of a driver crtc object. Drivers
214 * should use this function instead of drm_crtc_init(), which is only provided
215 * for backwards compatibility with drivers which do not yet support universal
216 * planes). For really simple hardware which has only 1 plane look at
217 * drm_simple_display_pipe_init() instead.
218 *
219 * Returns:
220 * Zero on success, error code on failure.
221 */
222int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
223 struct drm_plane *primary,
224 struct drm_plane *cursor,
225 const struct drm_crtc_funcs *funcs,
226 const char *name, ...)
227{
228 struct drm_mode_config *config = &dev->mode_config;
229 int ret;
230
231 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
232 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
233
234 crtc->dev = dev;
235 crtc->funcs = funcs;
236
237 INIT_LIST_HEAD(&crtc->commit_list);
238 spin_lock_init(&crtc->commit_lock);
239
240 drm_modeset_lock_init(&crtc->mutex);
241 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
242 if (ret)
243 return ret;
244
245 if (name) {
246 va_list ap;
247
248 va_start(ap, name);
249 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
250 va_end(ap);
251 } else {
252 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
253 drm_num_crtcs(dev));
254 }
255 if (!crtc->name) {
256 drm_mode_object_unregister(dev, &crtc->base);
257 return -ENOMEM;
258 }
259
260 crtc->fence_context = dma_fence_context_alloc(1);
261 spin_lock_init(&crtc->fence_lock);
262 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
263 "CRTC:%d-%s", crtc->base.id, crtc->name);
264
265 crtc->base.properties = &crtc->properties;
266
267 list_add_tail(&crtc->head, &config->crtc_list);
268 crtc->index = config->num_crtc++;
269
270 crtc->primary = primary;
271 crtc->cursor = cursor;
272 if (primary && !primary->possible_crtcs)
273 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
274 if (cursor && !cursor->possible_crtcs)
275 cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
276
277 ret = drm_crtc_crc_init(crtc);
278 if (ret) {
279 drm_mode_object_unregister(dev, &crtc->base);
280 return ret;
281 }
282
283 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
284 drm_object_attach_property(&crtc->base, config->prop_active, 0);
285 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
286 drm_object_attach_property(&crtc->base,
287 config->prop_out_fence_ptr, 0);
288 }
289
290 return 0;
291}
292EXPORT_SYMBOL(drm_crtc_init_with_planes);
293
294/**
295 * drm_crtc_cleanup - Clean up the core crtc usage
296 * @crtc: CRTC to cleanup
297 *
298 * This function cleans up @crtc and removes it from the DRM mode setting
299 * core. Note that the function does *not* free the crtc structure itself,
300 * this is the responsibility of the caller.
301 */
302void drm_crtc_cleanup(struct drm_crtc *crtc)
303{
304 struct drm_device *dev = crtc->dev;
305
306 /* Note that the crtc_list is considered to be static; should we
307 * remove the drm_crtc at runtime we would have to decrement all
308 * the indices on the drm_crtc after us in the crtc_list.
309 */
310
311 drm_crtc_crc_fini(crtc);
312
313 kfree(crtc->gamma_store);
314 crtc->gamma_store = NULL;
315
316 drm_modeset_lock_fini(&crtc->mutex);
317
318 drm_mode_object_unregister(dev, &crtc->base);
319 list_del(&crtc->head);
320 dev->mode_config.num_crtc--;
321
322 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
323 if (crtc->state && crtc->funcs->atomic_destroy_state)
324 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
325
326 kfree(crtc->name);
327
328 memset(crtc, 0, sizeof(*crtc));
329}
330EXPORT_SYMBOL(drm_crtc_cleanup);
331
332/**
333 * drm_mode_getcrtc - get CRTC configuration
334 * @dev: drm device for the ioctl
335 * @data: data pointer for the ioctl
336 * @file_priv: drm file for the ioctl call
337 *
338 * Construct a CRTC configuration structure to return to the user.
339 *
340 * Called by the user via ioctl.
341 *
342 * Returns:
343 * Zero on success, negative errno on failure.
344 */
345int drm_mode_getcrtc(struct drm_device *dev,
346 void *data, struct drm_file *file_priv)
347{
348 struct drm_mode_crtc *crtc_resp = data;
349 struct drm_crtc *crtc;
350
351 if (!drm_core_check_feature(dev, DRIVER_MODESET))
352 return -EINVAL;
353
354 crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
355 if (!crtc)
356 return -ENOENT;
357
358 drm_modeset_lock_crtc(crtc, crtc->primary);
359 crtc_resp->gamma_size = crtc->gamma_size;
360 if (crtc->primary->fb)
361 crtc_resp->fb_id = crtc->primary->fb->base.id;
362 else
363 crtc_resp->fb_id = 0;
364
365 if (crtc->state) {
366 crtc_resp->x = crtc->primary->state->src_x >> 16;
367 crtc_resp->y = crtc->primary->state->src_y >> 16;
368 if (crtc->state->enable) {
369 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
370 crtc_resp->mode_valid = 1;
371
372 } else {
373 crtc_resp->mode_valid = 0;
374 }
375 } else {
376 crtc_resp->x = crtc->x;
377 crtc_resp->y = crtc->y;
378 if (crtc->enabled) {
379 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
380 crtc_resp->mode_valid = 1;
381
382 } else {
383 crtc_resp->mode_valid = 0;
384 }
385 }
386 drm_modeset_unlock_crtc(crtc);
387
388 return 0;
389}
390
391/**
392 * drm_mode_set_config_internal - helper to call ->set_config
393 * @set: modeset config to set
394 *
395 * This is a little helper to wrap internal calls to the ->set_config driver
396 * interface. The only thing it adds is correct refcounting dance.
397 *
398 * Returns:
399 * Zero on success, negative errno on failure.
400 */
401int drm_mode_set_config_internal(struct drm_mode_set *set)
402{
403 struct drm_crtc *crtc = set->crtc;
404 struct drm_framebuffer *fb;
405 struct drm_crtc *tmp;
406 int ret;
407
408 /*
409 * NOTE: ->set_config can also disable other crtcs (if we steal all
410 * connectors from it), hence we need to refcount the fbs across all
411 * crtcs. Atomic modeset will have saner semantics ...
412 */
413 drm_for_each_crtc(tmp, crtc->dev)
414 tmp->primary->old_fb = tmp->primary->fb;
415
416 fb = set->fb;
417
418 ret = crtc->funcs->set_config(set);
419 if (ret == 0) {
420 crtc->primary->crtc = crtc;
421 crtc->primary->fb = fb;
422 }
423
424 drm_for_each_crtc(tmp, crtc->dev) {
425 if (tmp->primary->fb)
426 drm_framebuffer_reference(tmp->primary->fb);
427 if (tmp->primary->old_fb)
428 drm_framebuffer_unreference(tmp->primary->old_fb);
429 tmp->primary->old_fb = NULL;
430 }
431
432 return ret;
433}
434EXPORT_SYMBOL(drm_mode_set_config_internal);
435
436/**
437 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
438 * @mode: mode to query
439 * @hdisplay: hdisplay value to fill in
440 * @vdisplay: vdisplay value to fill in
441 *
442 * The vdisplay value will be doubled if the specified mode is a stereo mode of
443 * the appropriate layout.
444 */
445void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
446 int *hdisplay, int *vdisplay)
447{
448 struct drm_display_mode adjusted;
449
450 drm_mode_copy(&adjusted, mode);
451 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
452 *hdisplay = adjusted.crtc_hdisplay;
453 *vdisplay = adjusted.crtc_vdisplay;
454}
455EXPORT_SYMBOL(drm_crtc_get_hv_timing);
456
457/**
458 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
459 * CRTC viewport
460 * @crtc: CRTC that framebuffer will be displayed on
461 * @x: x panning
462 * @y: y panning
463 * @mode: mode that framebuffer will be displayed under
464 * @fb: framebuffer to check size of
465 */
466int drm_crtc_check_viewport(const struct drm_crtc *crtc,
467 int x, int y,
468 const struct drm_display_mode *mode,
469 const struct drm_framebuffer *fb)
470
471{
472 int hdisplay, vdisplay;
473
474 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
475
476 if (crtc->state &&
477 drm_rotation_90_or_270(crtc->primary->state->rotation))
478 swap(hdisplay, vdisplay);
479
480 return drm_framebuffer_check_src_coords(x << 16, y << 16,
481 hdisplay << 16, vdisplay << 16,
482 fb);
483}
484EXPORT_SYMBOL(drm_crtc_check_viewport);
485
486/**
487 * drm_mode_setcrtc - set CRTC configuration
488 * @dev: drm device for the ioctl
489 * @data: data pointer for the ioctl
490 * @file_priv: drm file for the ioctl call
491 *
492 * Build a new CRTC configuration based on user request.
493 *
494 * Called by the user via ioctl.
495 *
496 * Returns:
497 * Zero on success, negative errno on failure.
498 */
499int drm_mode_setcrtc(struct drm_device *dev, void *data,
500 struct drm_file *file_priv)
501{
502 struct drm_mode_config *config = &dev->mode_config;
503 struct drm_mode_crtc *crtc_req = data;
504 struct drm_crtc *crtc;
505 struct drm_connector **connector_set = NULL, *connector;
506 struct drm_framebuffer *fb = NULL;
507 struct drm_display_mode *mode = NULL;
508 struct drm_mode_set set;
509 uint32_t __user *set_connectors_ptr;
510 int ret;
511 int i;
512
513 if (!drm_core_check_feature(dev, DRIVER_MODESET))
514 return -EINVAL;
515
516 /*
517 * Universal plane src offsets are only 16.16, prevent havoc for
518 * drivers using universal plane code internally.
519 */
520 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
521 return -ERANGE;
522
523 drm_modeset_lock_all(dev);
524 crtc = drm_crtc_find(dev, crtc_req->crtc_id);
525 if (!crtc) {
526 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
527 ret = -ENOENT;
528 goto out;
529 }
530 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
531
532 if (crtc_req->mode_valid) {
533 /* If we have a mode we need a framebuffer. */
534 /* If we pass -1, set the mode with the currently bound fb */
535 if (crtc_req->fb_id == -1) {
536 if (!crtc->primary->fb) {
537 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
538 ret = -EINVAL;
539 goto out;
540 }
541 fb = crtc->primary->fb;
542 /* Make refcounting symmetric with the lookup path. */
543 drm_framebuffer_reference(fb);
544 } else {
545 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
546 if (!fb) {
547 DRM_DEBUG_KMS("Unknown FB ID%d\n",
548 crtc_req->fb_id);
549 ret = -ENOENT;
550 goto out;
551 }
552 }
553
554 mode = drm_mode_create(dev);
555 if (!mode) {
556 ret = -ENOMEM;
557 goto out;
558 }
559
560 ret = drm_mode_convert_umode(mode, &crtc_req->mode);
561 if (ret) {
562 DRM_DEBUG_KMS("Invalid mode\n");
563 goto out;
564 }
565
566 /*
567 * Check whether the primary plane supports the fb pixel format.
568 * Drivers not implementing the universal planes API use a
569 * default formats list provided by the DRM core which doesn't
570 * match real hardware capabilities. Skip the check in that
571 * case.
572 */
573 if (!crtc->primary->format_default) {
574 ret = drm_plane_check_pixel_format(crtc->primary,
575 fb->pixel_format);
576 if (ret) {
577 struct drm_format_name_buf format_name;
578 DRM_DEBUG_KMS("Invalid pixel format %s\n",
579 drm_get_format_name(fb->pixel_format,
580 &format_name));
581 goto out;
582 }
583 }
584
585 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
586 mode, fb);
587 if (ret)
588 goto out;
589
590 }
591
592 if (crtc_req->count_connectors == 0 && mode) {
593 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
594 ret = -EINVAL;
595 goto out;
596 }
597
598 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
599 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
600 crtc_req->count_connectors);
601 ret = -EINVAL;
602 goto out;
603 }
604
605 if (crtc_req->count_connectors > 0) {
606 u32 out_id;
607
608 /* Avoid unbounded kernel memory allocation */
609 if (crtc_req->count_connectors > config->num_connector) {
610 ret = -EINVAL;
611 goto out;
612 }
613
614 connector_set = kmalloc_array(crtc_req->count_connectors,
615 sizeof(struct drm_connector *),
616 GFP_KERNEL);
617 if (!connector_set) {
618 ret = -ENOMEM;
619 goto out;
620 }
621
622 for (i = 0; i < crtc_req->count_connectors; i++) {
623 connector_set[i] = NULL;
624 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
625 if (get_user(out_id, &set_connectors_ptr[i])) {
626 ret = -EFAULT;
627 goto out;
628 }
629
630 connector = drm_connector_lookup(dev, out_id);
631 if (!connector) {
632 DRM_DEBUG_KMS("Connector id %d unknown\n",
633 out_id);
634 ret = -ENOENT;
635 goto out;
636 }
637 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
638 connector->base.id,
639 connector->name);
640
641 connector_set[i] = connector;
642 }
643 }
644
645 set.crtc = crtc;
646 set.x = crtc_req->x;
647 set.y = crtc_req->y;
648 set.mode = mode;
649 set.connectors = connector_set;
650 set.num_connectors = crtc_req->count_connectors;
651 set.fb = fb;
652 ret = drm_mode_set_config_internal(&set);
653
654out:
655 if (fb)
656 drm_framebuffer_unreference(fb);
657
658 if (connector_set) {
659 for (i = 0; i < crtc_req->count_connectors; i++) {
660 if (connector_set[i])
661 drm_connector_unreference(connector_set[i]);
662 }
663 }
664 kfree(connector_set);
665 drm_mode_destroy(dev, mode);
666 drm_modeset_unlock_all(dev);
667 return ret;
668}
669
670int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
671 struct drm_property *property,
672 uint64_t value)
673{
674 int ret = -EINVAL;
675 struct drm_crtc *crtc = obj_to_crtc(obj);
676
677 if (crtc->funcs->set_property)
678 ret = crtc->funcs->set_property(crtc, property, value);
679 if (!ret)
680 drm_object_property_set_value(obj, property, value);
681
682 return ret;
683}