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