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 | */ |
87 | struct 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 | } |
97 | EXPORT_SYMBOL(drm_crtc_from_index); |
98 | |
99 | int 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 | |
110 | int 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 | |
127 | void 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 | |
138 | static 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 | |
150 | static 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 | |
157 | static const struct dma_fence_ops drm_crtc_fence_ops; |
158 | |
159 | static 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 | |
165 | static 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 | |
172 | static 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 | |
179 | static 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 | |
184 | struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc) |
185 | { |
186 | struct dma_fence *fence; |
187 | |
188 | fence = kzalloc(size: 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 | */ |
233 | |
234 | __printf(6, 0) |
235 | static int __drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
236 | struct drm_plane *primary, |
237 | struct drm_plane *cursor, |
238 | const struct drm_crtc_funcs *funcs, |
239 | const char *name, va_list ap) |
240 | { |
241 | struct drm_mode_config *config = &dev->mode_config; |
242 | int ret; |
243 | |
244 | WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); |
245 | WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); |
246 | |
247 | /* crtc index is used with 32bit bitmasks */ |
248 | if (WARN_ON(config->num_crtc >= 32)) |
249 | return -EINVAL; |
250 | |
251 | WARN_ON(drm_drv_uses_atomic_modeset(dev) && |
252 | (!funcs->atomic_destroy_state || |
253 | !funcs->atomic_duplicate_state)); |
254 | |
255 | crtc->dev = dev; |
256 | crtc->funcs = funcs; |
257 | |
258 | INIT_LIST_HEAD(list: &crtc->commit_list); |
259 | spin_lock_init(&crtc->commit_lock); |
260 | |
261 | drm_modeset_lock_init(lock: &crtc->mutex); |
262 | ret = drm_mode_object_add(dev, obj: &crtc->base, DRM_MODE_OBJECT_CRTC); |
263 | if (ret) |
264 | return ret; |
265 | |
266 | if (name) { |
267 | crtc->name = kvasprintf(GFP_KERNEL, fmt: name, args: ap); |
268 | } else { |
269 | crtc->name = kasprintf(GFP_KERNEL, fmt: "crtc-%d" , config->num_crtc); |
270 | } |
271 | if (!crtc->name) { |
272 | drm_mode_object_unregister(dev, object: &crtc->base); |
273 | return -ENOMEM; |
274 | } |
275 | |
276 | crtc->fence_context = dma_fence_context_alloc(num: 1); |
277 | spin_lock_init(&crtc->fence_lock); |
278 | snprintf(buf: crtc->timeline_name, size: sizeof(crtc->timeline_name), |
279 | fmt: "CRTC:%d-%s" , crtc->base.id, crtc->name); |
280 | |
281 | crtc->base.properties = &crtc->properties; |
282 | |
283 | list_add_tail(new: &crtc->head, head: &config->crtc_list); |
284 | crtc->index = config->num_crtc++; |
285 | |
286 | crtc->primary = primary; |
287 | crtc->cursor = cursor; |
288 | if (primary && !primary->possible_crtcs) |
289 | primary->possible_crtcs = drm_crtc_mask(crtc); |
290 | if (cursor && !cursor->possible_crtcs) |
291 | cursor->possible_crtcs = drm_crtc_mask(crtc); |
292 | |
293 | ret = drm_crtc_crc_init(crtc); |
294 | if (ret) { |
295 | drm_mode_object_unregister(dev, object: &crtc->base); |
296 | return ret; |
297 | } |
298 | |
299 | if (drm_core_check_feature(dev, feature: DRIVER_ATOMIC)) { |
300 | drm_object_attach_property(obj: &crtc->base, property: config->prop_active, init_val: 0); |
301 | drm_object_attach_property(obj: &crtc->base, property: config->prop_mode_id, init_val: 0); |
302 | drm_object_attach_property(obj: &crtc->base, |
303 | property: config->prop_out_fence_ptr, init_val: 0); |
304 | drm_object_attach_property(obj: &crtc->base, |
305 | property: config->prop_vrr_enabled, init_val: 0); |
306 | } |
307 | |
308 | return 0; |
309 | } |
310 | |
311 | /** |
312 | * drm_crtc_init_with_planes - Initialise a new CRTC object with |
313 | * specified primary and cursor planes. |
314 | * @dev: DRM device |
315 | * @crtc: CRTC object to init |
316 | * @primary: Primary plane for CRTC |
317 | * @cursor: Cursor plane for CRTC |
318 | * @funcs: callbacks for the new CRTC |
319 | * @name: printf style format string for the CRTC name, or NULL for default name |
320 | * |
321 | * Inits a new object created as base part of a driver crtc object. Drivers |
322 | * should use this function instead of drm_crtc_init(), which is only provided |
323 | * for backwards compatibility with drivers which do not yet support universal |
324 | * planes). For really simple hardware which has only 1 plane look at |
325 | * drm_simple_display_pipe_init() instead. |
326 | * The &drm_crtc_funcs.destroy hook should call drm_crtc_cleanup() and kfree() |
327 | * the crtc structure. The crtc structure should not be allocated with |
328 | * devm_kzalloc(). |
329 | * |
330 | * The @primary and @cursor planes are only relevant for legacy uAPI, see |
331 | * &drm_crtc.primary and &drm_crtc.cursor. |
332 | * |
333 | * Note: consider using drmm_crtc_alloc_with_planes() or |
334 | * drmm_crtc_init_with_planes() instead of drm_crtc_init_with_planes() |
335 | * to let the DRM managed resource infrastructure take care of cleanup |
336 | * and deallocation. |
337 | * |
338 | * Returns: |
339 | * Zero on success, error code on failure. |
340 | */ |
341 | int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
342 | struct drm_plane *primary, |
343 | struct drm_plane *cursor, |
344 | const struct drm_crtc_funcs *funcs, |
345 | const char *name, ...) |
346 | { |
347 | va_list ap; |
348 | int ret; |
349 | |
350 | WARN_ON(!funcs->destroy); |
351 | |
352 | va_start(ap, name); |
353 | ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
354 | name, ap); |
355 | va_end(ap); |
356 | |
357 | return ret; |
358 | } |
359 | EXPORT_SYMBOL(drm_crtc_init_with_planes); |
360 | |
361 | static void drmm_crtc_init_with_planes_cleanup(struct drm_device *dev, |
362 | void *ptr) |
363 | { |
364 | struct drm_crtc *crtc = ptr; |
365 | |
366 | drm_crtc_cleanup(crtc); |
367 | } |
368 | |
369 | __printf(6, 0) |
370 | static int __drmm_crtc_init_with_planes(struct drm_device *dev, |
371 | struct drm_crtc *crtc, |
372 | struct drm_plane *primary, |
373 | struct drm_plane *cursor, |
374 | const struct drm_crtc_funcs *funcs, |
375 | const char *name, |
376 | va_list args) |
377 | { |
378 | int ret; |
379 | |
380 | drm_WARN_ON(dev, funcs && funcs->destroy); |
381 | |
382 | ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
383 | name, ap: args); |
384 | if (ret) |
385 | return ret; |
386 | |
387 | ret = drmm_add_action_or_reset(dev, drmm_crtc_init_with_planes_cleanup, |
388 | crtc); |
389 | if (ret) |
390 | return ret; |
391 | |
392 | return 0; |
393 | } |
394 | |
395 | /** |
396 | * drmm_crtc_init_with_planes - Initialise a new CRTC object with |
397 | * specified primary and cursor planes. |
398 | * @dev: DRM device |
399 | * @crtc: CRTC object to init |
400 | * @primary: Primary plane for CRTC |
401 | * @cursor: Cursor plane for CRTC |
402 | * @funcs: callbacks for the new CRTC |
403 | * @name: printf style format string for the CRTC name, or NULL for default name |
404 | * |
405 | * Inits a new object created as base part of a driver crtc object. Drivers |
406 | * should use this function instead of drm_crtc_init(), which is only provided |
407 | * for backwards compatibility with drivers which do not yet support universal |
408 | * planes). For really simple hardware which has only 1 plane look at |
409 | * drm_simple_display_pipe_init() instead. |
410 | * |
411 | * Cleanup is automatically handled through registering |
412 | * drmm_crtc_cleanup() with drmm_add_action(). The crtc structure should |
413 | * be allocated with drmm_kzalloc(). |
414 | * |
415 | * The @drm_crtc_funcs.destroy hook must be NULL. |
416 | * |
417 | * The @primary and @cursor planes are only relevant for legacy uAPI, see |
418 | * &drm_crtc.primary and &drm_crtc.cursor. |
419 | * |
420 | * Returns: |
421 | * Zero on success, error code on failure. |
422 | */ |
423 | int drmm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
424 | struct drm_plane *primary, |
425 | struct drm_plane *cursor, |
426 | const struct drm_crtc_funcs *funcs, |
427 | const char *name, ...) |
428 | { |
429 | va_list ap; |
430 | int ret; |
431 | |
432 | va_start(ap, name); |
433 | ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
434 | name, args: ap); |
435 | va_end(ap); |
436 | if (ret) |
437 | return ret; |
438 | |
439 | return 0; |
440 | } |
441 | EXPORT_SYMBOL(drmm_crtc_init_with_planes); |
442 | |
443 | void *__drmm_crtc_alloc_with_planes(struct drm_device *dev, |
444 | size_t size, size_t offset, |
445 | struct drm_plane *primary, |
446 | struct drm_plane *cursor, |
447 | const struct drm_crtc_funcs *funcs, |
448 | const char *name, ...) |
449 | { |
450 | void *container; |
451 | struct drm_crtc *crtc; |
452 | va_list ap; |
453 | int ret; |
454 | |
455 | if (WARN_ON(!funcs || funcs->destroy)) |
456 | return ERR_PTR(error: -EINVAL); |
457 | |
458 | container = drmm_kzalloc(dev, size, GFP_KERNEL); |
459 | if (!container) |
460 | return ERR_PTR(error: -ENOMEM); |
461 | |
462 | crtc = container + offset; |
463 | |
464 | va_start(ap, name); |
465 | ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
466 | name, args: ap); |
467 | va_end(ap); |
468 | if (ret) |
469 | return ERR_PTR(error: ret); |
470 | |
471 | return container; |
472 | } |
473 | EXPORT_SYMBOL(__drmm_crtc_alloc_with_planes); |
474 | |
475 | /** |
476 | * drm_crtc_cleanup - Clean up the core crtc usage |
477 | * @crtc: CRTC to cleanup |
478 | * |
479 | * This function cleans up @crtc and removes it from the DRM mode setting |
480 | * core. Note that the function does *not* free the crtc structure itself, |
481 | * this is the responsibility of the caller. |
482 | */ |
483 | void drm_crtc_cleanup(struct drm_crtc *crtc) |
484 | { |
485 | struct drm_device *dev = crtc->dev; |
486 | |
487 | /* Note that the crtc_list is considered to be static; should we |
488 | * remove the drm_crtc at runtime we would have to decrement all |
489 | * the indices on the drm_crtc after us in the crtc_list. |
490 | */ |
491 | |
492 | drm_crtc_crc_fini(crtc); |
493 | |
494 | kfree(objp: crtc->gamma_store); |
495 | crtc->gamma_store = NULL; |
496 | |
497 | drm_modeset_lock_fini(lock: &crtc->mutex); |
498 | |
499 | drm_mode_object_unregister(dev, object: &crtc->base); |
500 | list_del(entry: &crtc->head); |
501 | dev->mode_config.num_crtc--; |
502 | |
503 | WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); |
504 | if (crtc->state && crtc->funcs->atomic_destroy_state) |
505 | crtc->funcs->atomic_destroy_state(crtc, crtc->state); |
506 | |
507 | kfree(objp: crtc->name); |
508 | |
509 | memset(crtc, 0, sizeof(*crtc)); |
510 | } |
511 | EXPORT_SYMBOL(drm_crtc_cleanup); |
512 | |
513 | /** |
514 | * drm_mode_getcrtc - get CRTC configuration |
515 | * @dev: drm device for the ioctl |
516 | * @data: data pointer for the ioctl |
517 | * @file_priv: drm file for the ioctl call |
518 | * |
519 | * Construct a CRTC configuration structure to return to the user. |
520 | * |
521 | * Called by the user via ioctl. |
522 | * |
523 | * Returns: |
524 | * Zero on success, negative errno on failure. |
525 | */ |
526 | int drm_mode_getcrtc(struct drm_device *dev, |
527 | void *data, struct drm_file *file_priv) |
528 | { |
529 | struct drm_mode_crtc *crtc_resp = data; |
530 | struct drm_crtc *crtc; |
531 | struct drm_plane *plane; |
532 | |
533 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
534 | return -EOPNOTSUPP; |
535 | |
536 | crtc = drm_crtc_find(dev, file_priv, id: crtc_resp->crtc_id); |
537 | if (!crtc) |
538 | return -ENOENT; |
539 | |
540 | plane = crtc->primary; |
541 | |
542 | crtc_resp->gamma_size = crtc->gamma_size; |
543 | |
544 | drm_modeset_lock(lock: &plane->mutex, NULL); |
545 | if (plane->state && plane->state->fb) |
546 | crtc_resp->fb_id = plane->state->fb->base.id; |
547 | else if (!plane->state && plane->fb) |
548 | crtc_resp->fb_id = plane->fb->base.id; |
549 | else |
550 | crtc_resp->fb_id = 0; |
551 | |
552 | if (plane->state) { |
553 | crtc_resp->x = plane->state->src_x >> 16; |
554 | crtc_resp->y = plane->state->src_y >> 16; |
555 | } |
556 | drm_modeset_unlock(lock: &plane->mutex); |
557 | |
558 | drm_modeset_lock(lock: &crtc->mutex, NULL); |
559 | if (crtc->state) { |
560 | if (crtc->state->enable) { |
561 | drm_mode_convert_to_umode(out: &crtc_resp->mode, in: &crtc->state->mode); |
562 | crtc_resp->mode_valid = 1; |
563 | } else { |
564 | crtc_resp->mode_valid = 0; |
565 | } |
566 | } else { |
567 | crtc_resp->x = crtc->x; |
568 | crtc_resp->y = crtc->y; |
569 | |
570 | if (crtc->enabled) { |
571 | drm_mode_convert_to_umode(out: &crtc_resp->mode, in: &crtc->mode); |
572 | crtc_resp->mode_valid = 1; |
573 | |
574 | } else { |
575 | crtc_resp->mode_valid = 0; |
576 | } |
577 | } |
578 | if (!file_priv->aspect_ratio_allowed) |
579 | crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; |
580 | drm_modeset_unlock(lock: &crtc->mutex); |
581 | |
582 | return 0; |
583 | } |
584 | |
585 | static int __drm_mode_set_config_internal(struct drm_mode_set *set, |
586 | struct drm_modeset_acquire_ctx *ctx) |
587 | { |
588 | struct drm_crtc *crtc = set->crtc; |
589 | struct drm_framebuffer *fb; |
590 | struct drm_crtc *tmp; |
591 | int ret; |
592 | |
593 | WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); |
594 | |
595 | /* |
596 | * NOTE: ->set_config can also disable other crtcs (if we steal all |
597 | * connectors from it), hence we need to refcount the fbs across all |
598 | * crtcs. Atomic modeset will have saner semantics ... |
599 | */ |
600 | drm_for_each_crtc(tmp, crtc->dev) { |
601 | struct drm_plane *plane = tmp->primary; |
602 | |
603 | plane->old_fb = plane->fb; |
604 | } |
605 | |
606 | fb = set->fb; |
607 | |
608 | ret = crtc->funcs->set_config(set, ctx); |
609 | if (ret == 0) { |
610 | struct drm_plane *plane = crtc->primary; |
611 | |
612 | plane->crtc = fb ? crtc : NULL; |
613 | plane->fb = fb; |
614 | } |
615 | |
616 | drm_for_each_crtc(tmp, crtc->dev) { |
617 | struct drm_plane *plane = tmp->primary; |
618 | |
619 | if (plane->fb) |
620 | drm_framebuffer_get(fb: plane->fb); |
621 | if (plane->old_fb) |
622 | drm_framebuffer_put(fb: plane->old_fb); |
623 | plane->old_fb = NULL; |
624 | } |
625 | |
626 | return ret; |
627 | } |
628 | |
629 | /** |
630 | * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config |
631 | * @set: modeset config to set |
632 | * |
633 | * This is a little helper to wrap internal calls to the |
634 | * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is |
635 | * correct refcounting dance. |
636 | * |
637 | * This should only be used by non-atomic legacy drivers. |
638 | * |
639 | * Returns: |
640 | * Zero on success, negative errno on failure. |
641 | */ |
642 | int drm_mode_set_config_internal(struct drm_mode_set *set) |
643 | { |
644 | WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev)); |
645 | |
646 | return __drm_mode_set_config_internal(set, NULL); |
647 | } |
648 | EXPORT_SYMBOL(drm_mode_set_config_internal); |
649 | |
650 | /** |
651 | * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the |
652 | * CRTC viewport |
653 | * @crtc: CRTC that framebuffer will be displayed on |
654 | * @x: x panning |
655 | * @y: y panning |
656 | * @mode: mode that framebuffer will be displayed under |
657 | * @fb: framebuffer to check size of |
658 | */ |
659 | int drm_crtc_check_viewport(const struct drm_crtc *crtc, |
660 | int x, int y, |
661 | const struct drm_display_mode *mode, |
662 | const struct drm_framebuffer *fb) |
663 | |
664 | { |
665 | int hdisplay, vdisplay; |
666 | |
667 | drm_mode_get_hv_timing(mode, hdisplay: &hdisplay, vdisplay: &vdisplay); |
668 | |
669 | if (crtc->state && |
670 | drm_rotation_90_or_270(rotation: crtc->primary->state->rotation)) |
671 | swap(hdisplay, vdisplay); |
672 | |
673 | return drm_framebuffer_check_src_coords(src_x: x << 16, src_y: y << 16, |
674 | src_w: hdisplay << 16, src_h: vdisplay << 16, |
675 | fb); |
676 | } |
677 | EXPORT_SYMBOL(drm_crtc_check_viewport); |
678 | |
679 | /** |
680 | * drm_mode_setcrtc - set CRTC configuration |
681 | * @dev: drm device for the ioctl |
682 | * @data: data pointer for the ioctl |
683 | * @file_priv: drm file for the ioctl call |
684 | * |
685 | * Build a new CRTC configuration based on user request. |
686 | * |
687 | * Called by the user via ioctl. |
688 | * |
689 | * Returns: |
690 | * Zero on success, negative errno on failure. |
691 | */ |
692 | int drm_mode_setcrtc(struct drm_device *dev, void *data, |
693 | struct drm_file *file_priv) |
694 | { |
695 | struct drm_mode_config *config = &dev->mode_config; |
696 | struct drm_mode_crtc *crtc_req = data; |
697 | struct drm_crtc *crtc; |
698 | struct drm_plane *plane; |
699 | struct drm_connector **connector_set = NULL, *connector; |
700 | struct drm_framebuffer *fb = NULL; |
701 | struct drm_display_mode *mode = NULL; |
702 | struct drm_mode_set set; |
703 | uint32_t __user *set_connectors_ptr; |
704 | struct drm_modeset_acquire_ctx ctx; |
705 | int ret, i, num_connectors = 0; |
706 | |
707 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
708 | return -EOPNOTSUPP; |
709 | |
710 | /* |
711 | * Universal plane src offsets are only 16.16, prevent havoc for |
712 | * drivers using universal plane code internally. |
713 | */ |
714 | if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) |
715 | return -ERANGE; |
716 | |
717 | crtc = drm_crtc_find(dev, file_priv, id: crtc_req->crtc_id); |
718 | if (!crtc) { |
719 | DRM_DEBUG_KMS("Unknown CRTC ID %d\n" , crtc_req->crtc_id); |
720 | return -ENOENT; |
721 | } |
722 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n" , crtc->base.id, crtc->name); |
723 | |
724 | plane = crtc->primary; |
725 | |
726 | /* allow disabling with the primary plane leased */ |
727 | if (crtc_req->mode_valid && !drm_lease_held(file_priv, id: plane->base.id)) |
728 | return -EACCES; |
729 | |
730 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, |
731 | DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret); |
732 | |
733 | if (crtc_req->mode_valid) { |
734 | /* If we have a mode we need a framebuffer. */ |
735 | /* If we pass -1, set the mode with the currently bound fb */ |
736 | if (crtc_req->fb_id == -1) { |
737 | struct drm_framebuffer *old_fb; |
738 | |
739 | if (plane->state) |
740 | old_fb = plane->state->fb; |
741 | else |
742 | old_fb = plane->fb; |
743 | |
744 | if (!old_fb) { |
745 | DRM_DEBUG_KMS("CRTC doesn't have current FB\n" ); |
746 | ret = -EINVAL; |
747 | goto out; |
748 | } |
749 | |
750 | fb = old_fb; |
751 | /* Make refcounting symmetric with the lookup path. */ |
752 | drm_framebuffer_get(fb); |
753 | } else { |
754 | fb = drm_framebuffer_lookup(dev, file_priv, id: crtc_req->fb_id); |
755 | if (!fb) { |
756 | DRM_DEBUG_KMS("Unknown FB ID%d\n" , |
757 | crtc_req->fb_id); |
758 | ret = -ENOENT; |
759 | goto out; |
760 | } |
761 | } |
762 | |
763 | mode = drm_mode_create(dev); |
764 | if (!mode) { |
765 | ret = -ENOMEM; |
766 | goto out; |
767 | } |
768 | if (!file_priv->aspect_ratio_allowed && |
769 | (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) { |
770 | DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n" ); |
771 | ret = -EINVAL; |
772 | goto out; |
773 | } |
774 | |
775 | |
776 | ret = drm_mode_convert_umode(dev, out: mode, in: &crtc_req->mode); |
777 | if (ret) { |
778 | DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n" , |
779 | ret, drm_get_mode_status_name(mode->status)); |
780 | drm_mode_debug_printmodeline(mode); |
781 | goto out; |
782 | } |
783 | |
784 | /* |
785 | * Check whether the primary plane supports the fb pixel format. |
786 | * Drivers not implementing the universal planes API use a |
787 | * default formats list provided by the DRM core which doesn't |
788 | * match real hardware capabilities. Skip the check in that |
789 | * case. |
790 | */ |
791 | if (!plane->format_default) { |
792 | ret = drm_plane_check_pixel_format(plane, |
793 | format: fb->format->format, |
794 | modifier: fb->modifier); |
795 | if (ret) { |
796 | DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n" , |
797 | &fb->format->format, |
798 | fb->modifier); |
799 | goto out; |
800 | } |
801 | } |
802 | |
803 | ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, |
804 | mode, fb); |
805 | if (ret) |
806 | goto out; |
807 | |
808 | } |
809 | |
810 | if (crtc_req->count_connectors == 0 && mode) { |
811 | DRM_DEBUG_KMS("Count connectors is 0 but mode set\n" ); |
812 | ret = -EINVAL; |
813 | goto out; |
814 | } |
815 | |
816 | if (crtc_req->count_connectors > 0 && (!mode || !fb)) { |
817 | DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n" , |
818 | crtc_req->count_connectors); |
819 | ret = -EINVAL; |
820 | goto out; |
821 | } |
822 | |
823 | if (crtc_req->count_connectors > 0) { |
824 | u32 out_id; |
825 | |
826 | /* Avoid unbounded kernel memory allocation */ |
827 | if (crtc_req->count_connectors > config->num_connector) { |
828 | ret = -EINVAL; |
829 | goto out; |
830 | } |
831 | |
832 | connector_set = kmalloc_array(n: crtc_req->count_connectors, |
833 | size: sizeof(struct drm_connector *), |
834 | GFP_KERNEL); |
835 | if (!connector_set) { |
836 | ret = -ENOMEM; |
837 | goto out; |
838 | } |
839 | |
840 | for (i = 0; i < crtc_req->count_connectors; i++) { |
841 | connector_set[i] = NULL; |
842 | set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; |
843 | if (get_user(out_id, &set_connectors_ptr[i])) { |
844 | ret = -EFAULT; |
845 | goto out; |
846 | } |
847 | |
848 | connector = drm_connector_lookup(dev, file_priv, id: out_id); |
849 | if (!connector) { |
850 | DRM_DEBUG_KMS("Connector id %d unknown\n" , |
851 | out_id); |
852 | ret = -ENOENT; |
853 | goto out; |
854 | } |
855 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n" , |
856 | connector->base.id, |
857 | connector->name); |
858 | |
859 | connector_set[i] = connector; |
860 | num_connectors++; |
861 | } |
862 | } |
863 | |
864 | set.crtc = crtc; |
865 | set.x = crtc_req->x; |
866 | set.y = crtc_req->y; |
867 | set.mode = mode; |
868 | set.connectors = connector_set; |
869 | set.num_connectors = num_connectors; |
870 | set.fb = fb; |
871 | |
872 | if (drm_drv_uses_atomic_modeset(dev)) |
873 | ret = crtc->funcs->set_config(&set, &ctx); |
874 | else |
875 | ret = __drm_mode_set_config_internal(set: &set, ctx: &ctx); |
876 | |
877 | out: |
878 | if (fb) |
879 | drm_framebuffer_put(fb); |
880 | |
881 | if (connector_set) { |
882 | for (i = 0; i < num_connectors; i++) { |
883 | if (connector_set[i]) |
884 | drm_connector_put(connector: connector_set[i]); |
885 | } |
886 | } |
887 | kfree(objp: connector_set); |
888 | drm_mode_destroy(dev, mode); |
889 | |
890 | /* In case we need to retry... */ |
891 | connector_set = NULL; |
892 | fb = NULL; |
893 | mode = NULL; |
894 | num_connectors = 0; |
895 | |
896 | DRM_MODESET_LOCK_ALL_END(dev, ctx, ret); |
897 | |
898 | return ret; |
899 | } |
900 | |
901 | int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, |
902 | struct drm_property *property, |
903 | uint64_t value) |
904 | { |
905 | int ret = -EINVAL; |
906 | struct drm_crtc *crtc = obj_to_crtc(obj); |
907 | |
908 | if (crtc->funcs->set_property) |
909 | ret = crtc->funcs->set_property(crtc, property, value); |
910 | if (!ret) |
911 | drm_object_property_set_value(obj, property, val: value); |
912 | |
913 | return ret; |
914 | } |
915 | |
916 | /** |
917 | * drm_crtc_create_scaling_filter_property - create a new scaling filter |
918 | * property |
919 | * |
920 | * @crtc: drm CRTC |
921 | * @supported_filters: bitmask of supported scaling filters, must include |
922 | * BIT(DRM_SCALING_FILTER_DEFAULT). |
923 | * |
924 | * This function lets driver to enable the scaling filter property on a given |
925 | * CRTC. |
926 | * |
927 | * RETURNS: |
928 | * Zero for success or -errno |
929 | */ |
930 | int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, |
931 | unsigned int supported_filters) |
932 | { |
933 | struct drm_property *prop = |
934 | drm_create_scaling_filter_prop(dev: crtc->dev, supported_filters); |
935 | |
936 | if (IS_ERR(ptr: prop)) |
937 | return PTR_ERR(ptr: prop); |
938 | |
939 | drm_object_attach_property(obj: &crtc->base, property: prop, |
940 | init_val: DRM_SCALING_FILTER_DEFAULT); |
941 | crtc->scaling_filter_property = prop; |
942 | |
943 | return 0; |
944 | } |
945 | EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property); |
946 | |