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