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 driver allocates and zeroes an instance 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: &set);
108}
109
110int drm_crtc_register_all(struct drm_device *dev)
111{
112 struct drm_crtc *crtc;
113 int ret = 0;
114
115 drm_for_each_crtc(crtc, dev) {
116 drm_debugfs_crtc_add(crtc);
117
118 if (crtc->funcs->late_register)
119 ret = crtc->funcs->late_register(crtc);
120 if (ret)
121 return ret;
122 }
123
124 return 0;
125}
126
127void drm_crtc_unregister_all(struct drm_device *dev)
128{
129 struct drm_crtc *crtc;
130
131 drm_for_each_crtc(crtc, dev) {
132 if (crtc->funcs->early_unregister)
133 crtc->funcs->early_unregister(crtc);
134 drm_debugfs_crtc_remove(crtc);
135 }
136}
137
138static int drm_crtc_crc_init(struct drm_crtc *crtc)
139{
140#ifdef CONFIG_DEBUG_FS
141 spin_lock_init(&crtc->crc.lock);
142 init_waitqueue_head(&crtc->crc.wq);
143 crtc->crc.source = kstrdup(s: "auto", GFP_KERNEL);
144 if (!crtc->crc.source)
145 return -ENOMEM;
146#endif
147 return 0;
148}
149
150static void drm_crtc_crc_fini(struct drm_crtc *crtc)
151{
152#ifdef CONFIG_DEBUG_FS
153 kfree(objp: crtc->crc.source);
154#endif
155}
156
157static const struct dma_fence_ops drm_crtc_fence_ops;
158
159static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
160{
161 BUG_ON(fence->ops != &drm_crtc_fence_ops);
162 return container_of(fence->lock, struct drm_crtc, fence_lock);
163}
164
165static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
166{
167 struct drm_crtc *crtc = fence_to_crtc(fence);
168
169 return crtc->dev->driver->name;
170}
171
172static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
173{
174 struct drm_crtc *crtc = fence_to_crtc(fence);
175
176 return crtc->timeline_name;
177}
178
179static const struct dma_fence_ops drm_crtc_fence_ops = {
180 .get_driver_name = drm_crtc_fence_get_driver_name,
181 .get_timeline_name = drm_crtc_fence_get_timeline_name,
182};
183
184struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
185{
186 struct dma_fence *fence;
187
188 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
189 if (!fence)
190 return NULL;
191
192 dma_fence_init(fence, ops: &drm_crtc_fence_ops, lock: &crtc->fence_lock,
193 context: crtc->fence_context, seqno: ++crtc->fence_seqno);
194
195 return fence;
196}
197
198/**
199 * DOC: standard CRTC properties
200 *
201 * DRM CRTCs have a few standardized properties:
202 *
203 * ACTIVE:
204 * Atomic property for setting the power state of the CRTC. When set to 1
205 * the CRTC will actively display content. When set to 0 the CRTC will be
206 * powered off. There is no expectation that user-space will reset CRTC
207 * resources like the mode and planes when setting ACTIVE to 0.
208 *
209 * User-space can rely on an ACTIVE change to 1 to never fail an atomic
210 * test as long as no other property has changed. If a change to ACTIVE
211 * fails an atomic test, this is a driver bug. For this reason setting
212 * ACTIVE to 0 must not release internal resources (like reserved memory
213 * bandwidth or clock generators).
214 *
215 * Note that the legacy DPMS property on connectors is internally routed
216 * to control this property for atomic drivers.
217 * MODE_ID:
218 * Atomic property for setting the CRTC display timings. The value is the
219 * ID of a blob containing the DRM mode info. To disable the CRTC,
220 * user-space must set this property to 0.
221 *
222 * Setting MODE_ID to 0 will release reserved resources for the CRTC.
223 * SCALING_FILTER:
224 * Atomic property for setting the scaling filter for CRTC scaler
225 *
226 * The value of this property can be one of the following:
227 *
228 * Default:
229 * Driver's default scaling filter
230 * Nearest Neighbor:
231 * Nearest Neighbor scaling filter
232 * SHARPNESS_STRENGTH:
233 * Atomic property for setting the sharpness strength/intensity by userspace.
234 *
235 * The value of this property is set as an integer value ranging
236 * from 0 - 255 where:
237 *
238 * 0: Sharpness feature is disabled(default value).
239 *
240 * 1: Minimum sharpness.
241 *
242 * 255: Maximum sharpness.
243 *
244 * User can gradually increase or decrease the sharpness level and can
245 * set the optimum value depending on content.
246 * This value will be passed to kernel through the UAPI.
247 * The setting of this property does not require modeset.
248 * The sharpness effect takes place post blending on the final composed output.
249 * If the feature is disabled, the content remains same without any sharpening effect
250 * and when this feature is applied, it enhances the clarity of the content.
251 */
252
253__printf(6, 0)
254static int __drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
255 struct drm_plane *primary,
256 struct drm_plane *cursor,
257 const struct drm_crtc_funcs *funcs,
258 const char *name, va_list ap)
259{
260 struct drm_mode_config *config = &dev->mode_config;
261 int ret;
262
263 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
264 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
265
266 /* crtc index is used with 32bit bitmasks */
267 if (WARN_ON(config->num_crtc >= 32))
268 return -EINVAL;
269
270 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
271 (!funcs->atomic_destroy_state ||
272 !funcs->atomic_duplicate_state));
273
274 crtc->dev = dev;
275 crtc->funcs = funcs;
276
277 INIT_LIST_HEAD(list: &crtc->commit_list);
278 spin_lock_init(&crtc->commit_lock);
279
280 drm_modeset_lock_init(lock: &crtc->mutex);
281 ret = drm_mode_object_add(dev, obj: &crtc->base, DRM_MODE_OBJECT_CRTC);
282 if (ret)
283 return ret;
284
285 if (name) {
286 crtc->name = kvasprintf(GFP_KERNEL, fmt: name, args: ap);
287 } else {
288 crtc->name = kasprintf(GFP_KERNEL, fmt: "crtc-%d", config->num_crtc);
289 }
290 if (!crtc->name) {
291 drm_mode_object_unregister(dev, object: &crtc->base);
292 return -ENOMEM;
293 }
294
295 crtc->fence_context = dma_fence_context_alloc(num: 1);
296 spin_lock_init(&crtc->fence_lock);
297 snprintf(buf: crtc->timeline_name, size: sizeof(crtc->timeline_name),
298 fmt: "CRTC:%d-%s", crtc->base.id, crtc->name);
299
300 crtc->base.properties = &crtc->properties;
301
302 list_add_tail(new: &crtc->head, head: &config->crtc_list);
303 crtc->index = config->num_crtc++;
304
305 crtc->primary = primary;
306 crtc->cursor = cursor;
307 if (primary && !primary->possible_crtcs)
308 primary->possible_crtcs = drm_crtc_mask(crtc);
309 if (cursor && !cursor->possible_crtcs)
310 cursor->possible_crtcs = drm_crtc_mask(crtc);
311
312 ret = drm_crtc_crc_init(crtc);
313 if (ret) {
314 drm_mode_object_unregister(dev, object: &crtc->base);
315 return ret;
316 }
317
318 if (drm_core_check_feature(dev, feature: DRIVER_ATOMIC)) {
319 drm_object_attach_property(obj: &crtc->base, property: config->prop_active, init_val: 0);
320 drm_object_attach_property(obj: &crtc->base, property: config->prop_mode_id, init_val: 0);
321 drm_object_attach_property(obj: &crtc->base,
322 property: config->prop_out_fence_ptr, init_val: 0);
323 drm_object_attach_property(obj: &crtc->base,
324 property: config->prop_vrr_enabled, init_val: 0);
325 }
326
327 return 0;
328}
329
330/**
331 * drm_crtc_init_with_planes - Initialise a new CRTC object with
332 * specified primary and cursor planes.
333 * @dev: DRM device
334 * @crtc: CRTC object to init
335 * @primary: Primary plane for CRTC
336 * @cursor: Cursor plane for CRTC
337 * @funcs: callbacks for the new CRTC
338 * @name: printf style format string for the CRTC name, or NULL for default name
339 *
340 * Inits a new object created as base part of a driver crtc object. Drivers
341 * should use this function instead of drm_crtc_init(), which is only provided
342 * for backwards compatibility with drivers which do not yet support universal
343 * planes). For really simple hardware which has only 1 plane look at
344 * drm_simple_display_pipe_init() instead.
345 * The &drm_crtc_funcs.destroy hook should call drm_crtc_cleanup() and kfree()
346 * the crtc structure. The crtc structure should not be allocated with
347 * devm_kzalloc().
348 *
349 * The @primary and @cursor planes are only relevant for legacy uAPI, see
350 * &drm_crtc.primary and &drm_crtc.cursor.
351 *
352 * Note: consider using drmm_crtc_alloc_with_planes() or
353 * drmm_crtc_init_with_planes() instead of drm_crtc_init_with_planes()
354 * to let the DRM managed resource infrastructure take care of cleanup
355 * and deallocation.
356 *
357 * Returns:
358 * Zero on success, error code on failure.
359 */
360int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
361 struct drm_plane *primary,
362 struct drm_plane *cursor,
363 const struct drm_crtc_funcs *funcs,
364 const char *name, ...)
365{
366 va_list ap;
367 int ret;
368
369 WARN_ON(!funcs->destroy);
370
371 va_start(ap, name);
372 ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
373 name, ap);
374 va_end(ap);
375
376 return ret;
377}
378EXPORT_SYMBOL(drm_crtc_init_with_planes);
379
380static void drmm_crtc_init_with_planes_cleanup(struct drm_device *dev,
381 void *ptr)
382{
383 struct drm_crtc *crtc = ptr;
384
385 drm_crtc_cleanup(crtc);
386}
387
388__printf(6, 0)
389static int __drmm_crtc_init_with_planes(struct drm_device *dev,
390 struct drm_crtc *crtc,
391 struct drm_plane *primary,
392 struct drm_plane *cursor,
393 const struct drm_crtc_funcs *funcs,
394 const char *name,
395 va_list args)
396{
397 int ret;
398
399 drm_WARN_ON(dev, funcs && funcs->destroy);
400
401 ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
402 name, ap: args);
403 if (ret)
404 return ret;
405
406 ret = drmm_add_action_or_reset(dev, drmm_crtc_init_with_planes_cleanup,
407 crtc);
408 if (ret)
409 return ret;
410
411 return 0;
412}
413
414/**
415 * drmm_crtc_init_with_planes - Initialise a new CRTC object with
416 * specified primary and cursor planes.
417 * @dev: DRM device
418 * @crtc: CRTC object to init
419 * @primary: Primary plane for CRTC
420 * @cursor: Cursor plane for CRTC
421 * @funcs: callbacks for the new CRTC
422 * @name: printf style format string for the CRTC name, or NULL for default name
423 *
424 * Inits a new object created as base part of a driver crtc object. Drivers
425 * should use this function instead of drm_crtc_init(), which is only provided
426 * for backwards compatibility with drivers which do not yet support universal
427 * planes). For really simple hardware which has only 1 plane look at
428 * drm_simple_display_pipe_init() instead.
429 *
430 * Cleanup is automatically handled through registering
431 * drmm_crtc_cleanup() with drmm_add_action(). The crtc structure should
432 * be allocated with drmm_kzalloc().
433 *
434 * The @drm_crtc_funcs.destroy hook must be NULL.
435 *
436 * The @primary and @cursor planes are only relevant for legacy uAPI, see
437 * &drm_crtc.primary and &drm_crtc.cursor.
438 *
439 * Returns:
440 * Zero on success, error code on failure.
441 */
442int drmm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
443 struct drm_plane *primary,
444 struct drm_plane *cursor,
445 const struct drm_crtc_funcs *funcs,
446 const char *name, ...)
447{
448 va_list ap;
449 int ret;
450
451 va_start(ap, name);
452 ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
453 name, args: ap);
454 va_end(ap);
455 if (ret)
456 return ret;
457
458 return 0;
459}
460EXPORT_SYMBOL(drmm_crtc_init_with_planes);
461
462void *__drmm_crtc_alloc_with_planes(struct drm_device *dev,
463 size_t size, size_t offset,
464 struct drm_plane *primary,
465 struct drm_plane *cursor,
466 const struct drm_crtc_funcs *funcs,
467 const char *name, ...)
468{
469 void *container;
470 struct drm_crtc *crtc;
471 va_list ap;
472 int ret;
473
474 if (WARN_ON(!funcs || funcs->destroy))
475 return ERR_PTR(error: -EINVAL);
476
477 container = drmm_kzalloc(dev, size, GFP_KERNEL);
478 if (!container)
479 return ERR_PTR(error: -ENOMEM);
480
481 crtc = container + offset;
482
483 va_start(ap, name);
484 ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
485 name, args: ap);
486 va_end(ap);
487 if (ret)
488 return ERR_PTR(error: ret);
489
490 return container;
491}
492EXPORT_SYMBOL(__drmm_crtc_alloc_with_planes);
493
494/**
495 * drm_crtc_cleanup - Clean up the core crtc usage
496 * @crtc: CRTC to cleanup
497 *
498 * This function cleans up @crtc and removes it from the DRM mode setting
499 * core. Note that the function does *not* free the crtc structure itself,
500 * this is the responsibility of the caller.
501 */
502void drm_crtc_cleanup(struct drm_crtc *crtc)
503{
504 struct drm_device *dev = crtc->dev;
505
506 /* Note that the crtc_list is considered to be static; should we
507 * remove the drm_crtc at runtime we would have to decrement all
508 * the indices on the drm_crtc after us in the crtc_list.
509 */
510
511 drm_crtc_crc_fini(crtc);
512
513 kfree(objp: crtc->gamma_store);
514 crtc->gamma_store = NULL;
515
516 drm_modeset_lock_fini(lock: &crtc->mutex);
517
518 drm_mode_object_unregister(dev, object: &crtc->base);
519 list_del(entry: &crtc->head);
520 dev->mode_config.num_crtc--;
521
522 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
523 if (crtc->state && crtc->funcs->atomic_destroy_state)
524 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
525
526 kfree(objp: crtc->name);
527
528 memset(crtc, 0, sizeof(*crtc));
529}
530EXPORT_SYMBOL(drm_crtc_cleanup);
531
532/**
533 * drm_mode_getcrtc - get CRTC configuration
534 * @dev: drm device for the ioctl
535 * @data: data pointer for the ioctl
536 * @file_priv: drm file for the ioctl call
537 *
538 * Construct a CRTC configuration structure to return to the user.
539 *
540 * Called by the user via ioctl.
541 *
542 * Returns:
543 * Zero on success, negative errno on failure.
544 */
545int drm_mode_getcrtc(struct drm_device *dev,
546 void *data, struct drm_file *file_priv)
547{
548 struct drm_mode_crtc *crtc_resp = data;
549 struct drm_crtc *crtc;
550 struct drm_plane *plane;
551
552 if (!drm_core_check_feature(dev, feature: DRIVER_MODESET))
553 return -EOPNOTSUPP;
554
555 crtc = drm_crtc_find(dev, file_priv, id: crtc_resp->crtc_id);
556 if (!crtc)
557 return -ENOENT;
558
559 plane = crtc->primary;
560
561 crtc_resp->gamma_size = crtc->gamma_size;
562
563 drm_modeset_lock(lock: &plane->mutex, NULL);
564 if (plane->state && plane->state->fb)
565 crtc_resp->fb_id = plane->state->fb->base.id;
566 else if (!plane->state && plane->fb)
567 crtc_resp->fb_id = plane->fb->base.id;
568 else
569 crtc_resp->fb_id = 0;
570
571 if (plane->state) {
572 crtc_resp->x = plane->state->src_x >> 16;
573 crtc_resp->y = plane->state->src_y >> 16;
574 }
575 drm_modeset_unlock(lock: &plane->mutex);
576
577 drm_modeset_lock(lock: &crtc->mutex, NULL);
578 if (crtc->state) {
579 if (crtc->state->enable) {
580 drm_mode_convert_to_umode(out: &crtc_resp->mode, in: &crtc->state->mode);
581 crtc_resp->mode_valid = 1;
582 } else {
583 crtc_resp->mode_valid = 0;
584 }
585 } else {
586 crtc_resp->x = crtc->x;
587 crtc_resp->y = crtc->y;
588
589 if (crtc->enabled) {
590 drm_mode_convert_to_umode(out: &crtc_resp->mode, in: &crtc->mode);
591 crtc_resp->mode_valid = 1;
592
593 } else {
594 crtc_resp->mode_valid = 0;
595 }
596 }
597 if (!file_priv->aspect_ratio_allowed)
598 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
599 drm_modeset_unlock(lock: &crtc->mutex);
600
601 return 0;
602}
603
604static int __drm_mode_set_config_internal(struct drm_mode_set *set,
605 struct drm_modeset_acquire_ctx *ctx)
606{
607 struct drm_crtc *crtc = set->crtc;
608 struct drm_framebuffer *fb;
609 struct drm_crtc *tmp;
610 int ret;
611
612 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
613
614 /*
615 * NOTE: ->set_config can also disable other crtcs (if we steal all
616 * connectors from it), hence we need to refcount the fbs across all
617 * crtcs. Atomic modeset will have saner semantics ...
618 */
619 drm_for_each_crtc(tmp, crtc->dev) {
620 struct drm_plane *plane = tmp->primary;
621
622 plane->old_fb = plane->fb;
623 }
624
625 fb = set->fb;
626
627 ret = crtc->funcs->set_config(set, ctx);
628 if (ret == 0) {
629 struct drm_plane *plane = crtc->primary;
630
631 plane->crtc = fb ? crtc : NULL;
632 plane->fb = fb;
633 }
634
635 drm_for_each_crtc(tmp, crtc->dev) {
636 struct drm_plane *plane = tmp->primary;
637
638 if (plane->fb)
639 drm_framebuffer_get(fb: plane->fb);
640 if (plane->old_fb)
641 drm_framebuffer_put(fb: plane->old_fb);
642 plane->old_fb = NULL;
643 }
644
645 return ret;
646}
647
648/**
649 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
650 * @set: modeset config to set
651 *
652 * This is a little helper to wrap internal calls to the
653 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
654 * correct refcounting dance.
655 *
656 * This should only be used by non-atomic legacy drivers.
657 *
658 * Returns:
659 * Zero on success, negative errno on failure.
660 */
661int drm_mode_set_config_internal(struct drm_mode_set *set)
662{
663 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
664
665 return __drm_mode_set_config_internal(set, NULL);
666}
667EXPORT_SYMBOL(drm_mode_set_config_internal);
668
669/**
670 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
671 * CRTC viewport
672 * @crtc: CRTC that framebuffer will be displayed on
673 * @x: x panning
674 * @y: y panning
675 * @mode: mode that framebuffer will be displayed under
676 * @fb: framebuffer to check size of
677 */
678int drm_crtc_check_viewport(const struct drm_crtc *crtc,
679 int x, int y,
680 const struct drm_display_mode *mode,
681 const struct drm_framebuffer *fb)
682
683{
684 int hdisplay, vdisplay;
685
686 drm_mode_get_hv_timing(mode, hdisplay: &hdisplay, vdisplay: &vdisplay);
687
688 if (crtc->state &&
689 drm_rotation_90_or_270(rotation: crtc->primary->state->rotation))
690 swap(hdisplay, vdisplay);
691
692 return drm_framebuffer_check_src_coords(src_x: x << 16, src_y: y << 16,
693 src_w: hdisplay << 16, src_h: vdisplay << 16,
694 fb);
695}
696EXPORT_SYMBOL(drm_crtc_check_viewport);
697
698/**
699 * drm_mode_setcrtc - set CRTC configuration
700 * @dev: drm device for the ioctl
701 * @data: data pointer for the ioctl
702 * @file_priv: drm file for the ioctl call
703 *
704 * Build a new CRTC configuration based on user request.
705 *
706 * Called by the user via ioctl.
707 *
708 * Returns:
709 * Zero on success, negative errno on failure.
710 */
711int drm_mode_setcrtc(struct drm_device *dev, void *data,
712 struct drm_file *file_priv)
713{
714 struct drm_mode_config *config = &dev->mode_config;
715 struct drm_mode_crtc *crtc_req = data;
716 struct drm_crtc *crtc;
717 struct drm_plane *plane;
718 struct drm_connector **connector_set = NULL, *connector;
719 struct drm_framebuffer *fb = NULL;
720 struct drm_display_mode *mode = NULL;
721 struct drm_mode_set set;
722 uint32_t __user *set_connectors_ptr;
723 struct drm_modeset_acquire_ctx ctx;
724 int ret, i, num_connectors = 0;
725
726 if (!drm_core_check_feature(dev, feature: DRIVER_MODESET))
727 return -EOPNOTSUPP;
728
729 /*
730 * Universal plane src offsets are only 16.16, prevent havoc for
731 * drivers using universal plane code internally.
732 */
733 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
734 return -ERANGE;
735
736 crtc = drm_crtc_find(dev, file_priv, id: crtc_req->crtc_id);
737 if (!crtc) {
738 drm_dbg_kms(dev, "Unknown CRTC ID %d\n", crtc_req->crtc_id);
739 return -ENOENT;
740 }
741 drm_dbg_kms(dev, "[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
742
743 plane = crtc->primary;
744
745 /* allow disabling with the primary plane leased */
746 if (crtc_req->mode_valid && !drm_lease_held(file_priv, id: plane->base.id))
747 return -EACCES;
748
749 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
750 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
751
752 if (crtc_req->mode_valid) {
753 /* If we have a mode we need a framebuffer. */
754 /* If we pass -1, set the mode with the currently bound fb */
755 if (crtc_req->fb_id == -1) {
756 struct drm_framebuffer *old_fb;
757
758 if (plane->state)
759 old_fb = plane->state->fb;
760 else
761 old_fb = plane->fb;
762
763 if (!old_fb) {
764 drm_dbg_kms(dev, "CRTC doesn't have current FB\n");
765 ret = -EINVAL;
766 goto out;
767 }
768
769 fb = old_fb;
770 /* Make refcounting symmetric with the lookup path. */
771 drm_framebuffer_get(fb);
772 } else {
773 fb = drm_framebuffer_lookup(dev, file_priv, id: crtc_req->fb_id);
774 if (!fb) {
775 drm_dbg_kms(dev, "Unknown FB ID%d\n",
776 crtc_req->fb_id);
777 ret = -ENOENT;
778 goto out;
779 }
780 }
781
782 mode = drm_mode_create(dev);
783 if (!mode) {
784 ret = -ENOMEM;
785 goto out;
786 }
787 if (!file_priv->aspect_ratio_allowed &&
788 (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
789 drm_dbg_kms(dev, "Unexpected aspect-ratio flag bits\n");
790 ret = -EINVAL;
791 goto out;
792 }
793
794
795 ret = drm_mode_convert_umode(dev, out: mode, in: &crtc_req->mode);
796 if (ret) {
797 drm_dbg_kms(dev, "Invalid mode (%s, %pe): " DRM_MODE_FMT "\n",
798 drm_get_mode_status_name(mode->status),
799 ERR_PTR(ret), DRM_MODE_ARG(mode));
800 goto out;
801 }
802
803 /*
804 * Check whether the primary plane supports the fb pixel format.
805 * Drivers not implementing the universal planes API use a
806 * default formats list provided by the DRM core which doesn't
807 * match real hardware capabilities. Skip the check in that
808 * case.
809 */
810 if (!plane->format_default) {
811 if (!drm_plane_has_format(plane, format: fb->format->format, modifier: fb->modifier)) {
812 drm_dbg_kms(dev, "Invalid pixel format %p4cc, modifier 0x%llx\n",
813 &fb->format->format, fb->modifier);
814 ret = -EINVAL;
815 goto out;
816 }
817 }
818
819 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
820 mode, fb);
821 if (ret)
822 goto out;
823
824 }
825
826 if (crtc_req->count_connectors == 0 && mode) {
827 drm_dbg_kms(dev, "Count connectors is 0 but mode set\n");
828 ret = -EINVAL;
829 goto out;
830 }
831
832 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
833 drm_dbg_kms(dev, "Count connectors is %d but no mode or fb set\n",
834 crtc_req->count_connectors);
835 ret = -EINVAL;
836 goto out;
837 }
838
839 if (crtc_req->count_connectors > 0) {
840 u32 out_id;
841
842 /* Avoid unbounded kernel memory allocation */
843 if (crtc_req->count_connectors > config->num_connector) {
844 ret = -EINVAL;
845 goto out;
846 }
847
848 connector_set = kmalloc_array(crtc_req->count_connectors,
849 sizeof(struct drm_connector *),
850 GFP_KERNEL);
851 if (!connector_set) {
852 ret = -ENOMEM;
853 goto out;
854 }
855
856 for (i = 0; i < crtc_req->count_connectors; i++) {
857 connector_set[i] = NULL;
858 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
859 if (get_user(out_id, &set_connectors_ptr[i])) {
860 ret = -EFAULT;
861 goto out;
862 }
863
864 connector = drm_connector_lookup(dev, file_priv, id: out_id);
865 if (!connector) {
866 drm_dbg_kms(dev, "Connector id %d unknown\n",
867 out_id);
868 ret = -ENOENT;
869 goto out;
870 }
871 drm_dbg_kms(dev, "[CONNECTOR:%d:%s]\n",
872 connector->base.id, connector->name);
873
874 connector_set[i] = connector;
875 num_connectors++;
876 }
877 }
878
879 set.crtc = crtc;
880 set.x = crtc_req->x;
881 set.y = crtc_req->y;
882 set.mode = mode;
883 set.connectors = connector_set;
884 set.num_connectors = num_connectors;
885 set.fb = fb;
886
887 if (drm_drv_uses_atomic_modeset(dev))
888 ret = crtc->funcs->set_config(&set, &ctx);
889 else
890 ret = __drm_mode_set_config_internal(set: &set, ctx: &ctx);
891
892out:
893 if (fb)
894 drm_framebuffer_put(fb);
895
896 if (connector_set) {
897 for (i = 0; i < num_connectors; i++) {
898 if (connector_set[i])
899 drm_connector_put(connector: connector_set[i]);
900 }
901 }
902 kfree(objp: connector_set);
903 drm_mode_destroy(dev, mode);
904
905 /* In case we need to retry... */
906 connector_set = NULL;
907 fb = NULL;
908 mode = NULL;
909 num_connectors = 0;
910
911 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
912
913 return ret;
914}
915
916int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
917 struct drm_property *property,
918 uint64_t value)
919{
920 int ret = -EINVAL;
921 struct drm_crtc *crtc = obj_to_crtc(obj);
922
923 if (crtc->funcs->set_property)
924 ret = crtc->funcs->set_property(crtc, property, value);
925 if (!ret)
926 drm_object_property_set_value(obj, property, val: value);
927
928 return ret;
929}
930
931/**
932 * drm_crtc_create_scaling_filter_property - create a new scaling filter
933 * property
934 *
935 * @crtc: drm CRTC
936 * @supported_filters: bitmask of supported scaling filters, must include
937 * BIT(DRM_SCALING_FILTER_DEFAULT).
938 *
939 * This function lets driver to enable the scaling filter property on a given
940 * CRTC.
941 *
942 * RETURNS:
943 * Zero for success or -errno
944 */
945int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc,
946 unsigned int supported_filters)
947{
948 struct drm_property *prop =
949 drm_create_scaling_filter_prop(dev: crtc->dev, supported_filters);
950
951 if (IS_ERR(ptr: prop))
952 return PTR_ERR(ptr: prop);
953
954 drm_object_attach_property(obj: &crtc->base, property: prop,
955 init_val: DRM_SCALING_FILTER_DEFAULT);
956 crtc->scaling_filter_property = prop;
957
958 return 0;
959}
960EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property);
961
962int drm_crtc_create_sharpness_strength_property(struct drm_crtc *crtc)
963{
964 struct drm_device *dev = crtc->dev;
965 struct drm_property *prop =
966 drm_property_create_range(dev, flags: 0, name: "SHARPNESS_STRENGTH", min: 0, max: 255);
967
968 if (!prop)
969 return -ENOMEM;
970
971 crtc->sharpness_strength_property = prop;
972 drm_object_attach_property(obj: &crtc->base, property: prop, init_val: 0);
973
974 return 0;
975}
976EXPORT_SYMBOL(drm_crtc_create_sharpness_strength_property);
977
978/**
979 * drm_crtc_in_clone_mode - check if the given CRTC state is in clone mode
980 *
981 * @crtc_state: CRTC state to check
982 *
983 * This function determines if the given CRTC state is being cloned by multiple
984 * encoders.
985 *
986 * RETURNS:
987 * True if the CRTC state is in clone mode. False otherwise
988 */
989bool drm_crtc_in_clone_mode(struct drm_crtc_state *crtc_state)
990{
991 if (!crtc_state)
992 return false;
993
994 return hweight32(crtc_state->encoder_mask) > 1;
995}
996EXPORT_SYMBOL(drm_crtc_in_clone_mode);
997

source code of linux/drivers/gpu/drm/drm_crtc.c