1 | /* |
2 | * Copyright (c) 2006-2008 Intel Corporation |
3 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
4 | * Copyright (c) 2008 Red Hat Inc. |
5 | * |
6 | * DRM core CRTC related functions |
7 | * |
8 | * Permission to use, copy, modify, distribute, and sell this software and its |
9 | * documentation for any purpose is hereby granted without fee, provided that |
10 | * the above copyright notice appear in all copies and that both that copyright |
11 | * notice and this permission notice appear in supporting documentation, and |
12 | * that the name of the copyright holders not be used in advertising or |
13 | * publicity pertaining to distribution of the software without specific, |
14 | * written prior permission. The copyright holders make no representations |
15 | * about the suitability of this software for any purpose. It is provided "as |
16 | * is" without express or implied warranty. |
17 | * |
18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
24 | * OF THIS SOFTWARE. |
25 | * |
26 | * Authors: |
27 | * Keith Packard |
28 | * Eric Anholt <eric@anholt.net> |
29 | * Dave Airlie <airlied@linux.ie> |
30 | * Jesse Barnes <jesse.barnes@intel.com> |
31 | */ |
32 | #include <linux/ctype.h> |
33 | #include <linux/list.h> |
34 | #include <linux/slab.h> |
35 | #include <linux/export.h> |
36 | #include <linux/dma-fence.h> |
37 | #include <linux/uaccess.h> |
38 | #include <drm/drm_blend.h> |
39 | #include <drm/drm_crtc.h> |
40 | #include <drm/drm_edid.h> |
41 | #include <drm/drm_fourcc.h> |
42 | #include <drm/drm_framebuffer.h> |
43 | #include <drm/drm_managed.h> |
44 | #include <drm/drm_modeset_lock.h> |
45 | #include <drm/drm_atomic.h> |
46 | #include <drm/drm_auth.h> |
47 | #include <drm/drm_debugfs_crc.h> |
48 | #include <drm/drm_drv.h> |
49 | #include <drm/drm_print.h> |
50 | #include <drm/drm_file.h> |
51 | |
52 | #include "drm_crtc_internal.h" |
53 | #include "drm_internal.h" |
54 | |
55 | /** |
56 | * DOC: overview |
57 | * |
58 | * A CRTC represents the overall display pipeline. It receives pixel data from |
59 | * &drm_plane and blends them together. The &drm_display_mode is also attached |
60 | * to the CRTC, specifying display timings. On the output side the data is fed |
61 | * to one or more &drm_encoder, which are then each connected to one |
62 | * &drm_connector. |
63 | * |
64 | * To create a CRTC, a KMS drivers allocates and zeroes an instances of |
65 | * &struct drm_crtc (possibly as part of a larger structure) and registers it |
66 | * with a call to drm_crtc_init_with_planes(). |
67 | * |
68 | * The CRTC is also the entry point for legacy modeset operations, see |
69 | * &drm_crtc_funcs.set_config, legacy plane operations, see |
70 | * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy |
71 | * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these |
72 | * features are controlled through &drm_property and |
73 | * &drm_mode_config_funcs.atomic_check. |
74 | */ |
75 | |
76 | /** |
77 | * drm_crtc_from_index - find the registered CRTC at an index |
78 | * @dev: DRM device |
79 | * @idx: index of registered CRTC to find for |
80 | * |
81 | * Given a CRTC index, return the registered CRTC from DRM device's |
82 | * list of CRTCs with matching index. This is the inverse of drm_crtc_index(). |
83 | * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or |
84 | * &drm_driver.disable_vblank), since that still deals with indices instead |
85 | * of pointers to &struct drm_crtc." |
86 | */ |
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 | static unsigned int drm_num_crtcs(struct drm_device *dev) |
111 | { |
112 | unsigned int num = 0; |
113 | struct drm_crtc *tmp; |
114 | |
115 | drm_for_each_crtc(tmp, dev) { |
116 | num++; |
117 | } |
118 | |
119 | return num; |
120 | } |
121 | |
122 | int drm_crtc_register_all(struct drm_device *dev) |
123 | { |
124 | struct drm_crtc *crtc; |
125 | int ret = 0; |
126 | |
127 | drm_for_each_crtc(crtc, dev) { |
128 | drm_debugfs_crtc_add(crtc); |
129 | |
130 | if (crtc->funcs->late_register) |
131 | ret = crtc->funcs->late_register(crtc); |
132 | if (ret) |
133 | return ret; |
134 | } |
135 | |
136 | return 0; |
137 | } |
138 | |
139 | void drm_crtc_unregister_all(struct drm_device *dev) |
140 | { |
141 | struct drm_crtc *crtc; |
142 | |
143 | drm_for_each_crtc(crtc, dev) { |
144 | if (crtc->funcs->early_unregister) |
145 | crtc->funcs->early_unregister(crtc); |
146 | drm_debugfs_crtc_remove(crtc); |
147 | } |
148 | } |
149 | |
150 | static int drm_crtc_crc_init(struct drm_crtc *crtc) |
151 | { |
152 | #ifdef CONFIG_DEBUG_FS |
153 | spin_lock_init(&crtc->crc.lock); |
154 | init_waitqueue_head(&crtc->crc.wq); |
155 | crtc->crc.source = kstrdup(s: "auto" , GFP_KERNEL); |
156 | if (!crtc->crc.source) |
157 | return -ENOMEM; |
158 | #endif |
159 | return 0; |
160 | } |
161 | |
162 | static void drm_crtc_crc_fini(struct drm_crtc *crtc) |
163 | { |
164 | #ifdef CONFIG_DEBUG_FS |
165 | kfree(objp: crtc->crc.source); |
166 | #endif |
167 | } |
168 | |
169 | static const struct dma_fence_ops drm_crtc_fence_ops; |
170 | |
171 | static struct drm_crtc *fence_to_crtc(struct dma_fence *fence) |
172 | { |
173 | BUG_ON(fence->ops != &drm_crtc_fence_ops); |
174 | return container_of(fence->lock, struct drm_crtc, fence_lock); |
175 | } |
176 | |
177 | static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence) |
178 | { |
179 | struct drm_crtc *crtc = fence_to_crtc(fence); |
180 | |
181 | return crtc->dev->driver->name; |
182 | } |
183 | |
184 | static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence) |
185 | { |
186 | struct drm_crtc *crtc = fence_to_crtc(fence); |
187 | |
188 | return crtc->timeline_name; |
189 | } |
190 | |
191 | static const struct dma_fence_ops drm_crtc_fence_ops = { |
192 | .get_driver_name = drm_crtc_fence_get_driver_name, |
193 | .get_timeline_name = drm_crtc_fence_get_timeline_name, |
194 | }; |
195 | |
196 | struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc) |
197 | { |
198 | struct dma_fence *fence; |
199 | |
200 | fence = kzalloc(size: sizeof(*fence), GFP_KERNEL); |
201 | if (!fence) |
202 | return NULL; |
203 | |
204 | dma_fence_init(fence, ops: &drm_crtc_fence_ops, lock: &crtc->fence_lock, |
205 | context: crtc->fence_context, seqno: ++crtc->fence_seqno); |
206 | |
207 | return fence; |
208 | } |
209 | |
210 | /** |
211 | * DOC: standard CRTC properties |
212 | * |
213 | * DRM CRTCs have a few standardized properties: |
214 | * |
215 | * ACTIVE: |
216 | * Atomic property for setting the power state of the CRTC. When set to 1 |
217 | * the CRTC will actively display content. When set to 0 the CRTC will be |
218 | * powered off. There is no expectation that user-space will reset CRTC |
219 | * resources like the mode and planes when setting ACTIVE to 0. |
220 | * |
221 | * User-space can rely on an ACTIVE change to 1 to never fail an atomic |
222 | * test as long as no other property has changed. If a change to ACTIVE |
223 | * fails an atomic test, this is a driver bug. For this reason setting |
224 | * ACTIVE to 0 must not release internal resources (like reserved memory |
225 | * bandwidth or clock generators). |
226 | * |
227 | * Note that the legacy DPMS property on connectors is internally routed |
228 | * to control this property for atomic drivers. |
229 | * MODE_ID: |
230 | * Atomic property for setting the CRTC display timings. The value is the |
231 | * ID of a blob containing the DRM mode info. To disable the CRTC, |
232 | * user-space must set this property to 0. |
233 | * |
234 | * Setting MODE_ID to 0 will release reserved resources for the CRTC. |
235 | * SCALING_FILTER: |
236 | * Atomic property for setting the scaling filter for CRTC scaler |
237 | * |
238 | * The value of this property can be one of the following: |
239 | * |
240 | * Default: |
241 | * Driver's default scaling filter |
242 | * Nearest Neighbor: |
243 | * Nearest Neighbor scaling filter |
244 | */ |
245 | |
246 | __printf(6, 0) |
247 | static int __drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
248 | struct drm_plane *primary, |
249 | struct drm_plane *cursor, |
250 | const struct drm_crtc_funcs *funcs, |
251 | const char *name, va_list ap) |
252 | { |
253 | struct drm_mode_config *config = &dev->mode_config; |
254 | int ret; |
255 | |
256 | WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); |
257 | WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); |
258 | |
259 | /* crtc index is used with 32bit bitmasks */ |
260 | if (WARN_ON(config->num_crtc >= 32)) |
261 | return -EINVAL; |
262 | |
263 | WARN_ON(drm_drv_uses_atomic_modeset(dev) && |
264 | (!funcs->atomic_destroy_state || |
265 | !funcs->atomic_duplicate_state)); |
266 | |
267 | crtc->dev = dev; |
268 | crtc->funcs = funcs; |
269 | |
270 | INIT_LIST_HEAD(list: &crtc->commit_list); |
271 | spin_lock_init(&crtc->commit_lock); |
272 | |
273 | drm_modeset_lock_init(lock: &crtc->mutex); |
274 | ret = drm_mode_object_add(dev, obj: &crtc->base, DRM_MODE_OBJECT_CRTC); |
275 | if (ret) |
276 | return ret; |
277 | |
278 | if (name) { |
279 | crtc->name = kvasprintf(GFP_KERNEL, fmt: name, args: ap); |
280 | } else { |
281 | crtc->name = kasprintf(GFP_KERNEL, fmt: "crtc-%d" , |
282 | drm_num_crtcs(dev)); |
283 | } |
284 | if (!crtc->name) { |
285 | drm_mode_object_unregister(dev, object: &crtc->base); |
286 | return -ENOMEM; |
287 | } |
288 | |
289 | crtc->fence_context = dma_fence_context_alloc(num: 1); |
290 | spin_lock_init(&crtc->fence_lock); |
291 | snprintf(buf: crtc->timeline_name, size: sizeof(crtc->timeline_name), |
292 | fmt: "CRTC:%d-%s" , crtc->base.id, crtc->name); |
293 | |
294 | crtc->base.properties = &crtc->properties; |
295 | |
296 | list_add_tail(new: &crtc->head, head: &config->crtc_list); |
297 | crtc->index = config->num_crtc++; |
298 | |
299 | crtc->primary = primary; |
300 | crtc->cursor = cursor; |
301 | if (primary && !primary->possible_crtcs) |
302 | primary->possible_crtcs = drm_crtc_mask(crtc); |
303 | if (cursor && !cursor->possible_crtcs) |
304 | cursor->possible_crtcs = drm_crtc_mask(crtc); |
305 | |
306 | ret = drm_crtc_crc_init(crtc); |
307 | if (ret) { |
308 | drm_mode_object_unregister(dev, object: &crtc->base); |
309 | return ret; |
310 | } |
311 | |
312 | if (drm_core_check_feature(dev, feature: DRIVER_ATOMIC)) { |
313 | drm_object_attach_property(obj: &crtc->base, property: config->prop_active, init_val: 0); |
314 | drm_object_attach_property(obj: &crtc->base, property: config->prop_mode_id, init_val: 0); |
315 | drm_object_attach_property(obj: &crtc->base, |
316 | property: config->prop_out_fence_ptr, init_val: 0); |
317 | drm_object_attach_property(obj: &crtc->base, |
318 | property: config->prop_vrr_enabled, init_val: 0); |
319 | } |
320 | |
321 | return 0; |
322 | } |
323 | |
324 | /** |
325 | * drm_crtc_init_with_planes - Initialise a new CRTC object with |
326 | * specified primary and cursor planes. |
327 | * @dev: DRM device |
328 | * @crtc: CRTC object to init |
329 | * @primary: Primary plane for CRTC |
330 | * @cursor: Cursor plane for CRTC |
331 | * @funcs: callbacks for the new CRTC |
332 | * @name: printf style format string for the CRTC name, or NULL for default name |
333 | * |
334 | * Inits a new object created as base part of a driver crtc object. Drivers |
335 | * should use this function instead of drm_crtc_init(), which is only provided |
336 | * for backwards compatibility with drivers which do not yet support universal |
337 | * planes). For really simple hardware which has only 1 plane look at |
338 | * drm_simple_display_pipe_init() instead. |
339 | * The &drm_crtc_funcs.destroy hook should call drm_crtc_cleanup() and kfree() |
340 | * the crtc structure. The crtc structure should not be allocated with |
341 | * devm_kzalloc(). |
342 | * |
343 | * The @primary and @cursor planes are only relevant for legacy uAPI, see |
344 | * &drm_crtc.primary and &drm_crtc.cursor. |
345 | * |
346 | * Note: consider using drmm_crtc_alloc_with_planes() or |
347 | * drmm_crtc_init_with_planes() instead of drm_crtc_init_with_planes() |
348 | * to let the DRM managed resource infrastructure take care of cleanup |
349 | * and deallocation. |
350 | * |
351 | * Returns: |
352 | * Zero on success, error code on failure. |
353 | */ |
354 | int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
355 | struct drm_plane *primary, |
356 | struct drm_plane *cursor, |
357 | const struct drm_crtc_funcs *funcs, |
358 | const char *name, ...) |
359 | { |
360 | va_list ap; |
361 | int ret; |
362 | |
363 | WARN_ON(!funcs->destroy); |
364 | |
365 | va_start(ap, name); |
366 | ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
367 | name, ap); |
368 | va_end(ap); |
369 | |
370 | return ret; |
371 | } |
372 | EXPORT_SYMBOL(drm_crtc_init_with_planes); |
373 | |
374 | static void drmm_crtc_init_with_planes_cleanup(struct drm_device *dev, |
375 | void *ptr) |
376 | { |
377 | struct drm_crtc *crtc = ptr; |
378 | |
379 | drm_crtc_cleanup(crtc); |
380 | } |
381 | |
382 | __printf(6, 0) |
383 | static int __drmm_crtc_init_with_planes(struct drm_device *dev, |
384 | struct drm_crtc *crtc, |
385 | struct drm_plane *primary, |
386 | struct drm_plane *cursor, |
387 | const struct drm_crtc_funcs *funcs, |
388 | const char *name, |
389 | va_list args) |
390 | { |
391 | int ret; |
392 | |
393 | drm_WARN_ON(dev, funcs && funcs->destroy); |
394 | |
395 | ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
396 | name, ap: args); |
397 | if (ret) |
398 | return ret; |
399 | |
400 | ret = drmm_add_action_or_reset(dev, drmm_crtc_init_with_planes_cleanup, |
401 | crtc); |
402 | if (ret) |
403 | return ret; |
404 | |
405 | return 0; |
406 | } |
407 | |
408 | /** |
409 | * drmm_crtc_init_with_planes - Initialise a new CRTC object with |
410 | * specified primary and cursor planes. |
411 | * @dev: DRM device |
412 | * @crtc: CRTC object to init |
413 | * @primary: Primary plane for CRTC |
414 | * @cursor: Cursor plane for CRTC |
415 | * @funcs: callbacks for the new CRTC |
416 | * @name: printf style format string for the CRTC name, or NULL for default name |
417 | * |
418 | * Inits a new object created as base part of a driver crtc object. Drivers |
419 | * should use this function instead of drm_crtc_init(), which is only provided |
420 | * for backwards compatibility with drivers which do not yet support universal |
421 | * planes). For really simple hardware which has only 1 plane look at |
422 | * drm_simple_display_pipe_init() instead. |
423 | * |
424 | * Cleanup is automatically handled through registering |
425 | * drmm_crtc_cleanup() with drmm_add_action(). The crtc structure should |
426 | * be allocated with drmm_kzalloc(). |
427 | * |
428 | * The @drm_crtc_funcs.destroy hook must be NULL. |
429 | * |
430 | * The @primary and @cursor planes are only relevant for legacy uAPI, see |
431 | * &drm_crtc.primary and &drm_crtc.cursor. |
432 | * |
433 | * Returns: |
434 | * Zero on success, error code on failure. |
435 | */ |
436 | int drmm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
437 | struct drm_plane *primary, |
438 | struct drm_plane *cursor, |
439 | const struct drm_crtc_funcs *funcs, |
440 | const char *name, ...) |
441 | { |
442 | va_list ap; |
443 | int ret; |
444 | |
445 | va_start(ap, name); |
446 | ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
447 | name, args: ap); |
448 | va_end(ap); |
449 | if (ret) |
450 | return ret; |
451 | |
452 | return 0; |
453 | } |
454 | EXPORT_SYMBOL(drmm_crtc_init_with_planes); |
455 | |
456 | void *__drmm_crtc_alloc_with_planes(struct drm_device *dev, |
457 | size_t size, size_t offset, |
458 | struct drm_plane *primary, |
459 | struct drm_plane *cursor, |
460 | const struct drm_crtc_funcs *funcs, |
461 | const char *name, ...) |
462 | { |
463 | void *container; |
464 | struct drm_crtc *crtc; |
465 | va_list ap; |
466 | int ret; |
467 | |
468 | if (WARN_ON(!funcs || funcs->destroy)) |
469 | return ERR_PTR(error: -EINVAL); |
470 | |
471 | container = drmm_kzalloc(dev, size, GFP_KERNEL); |
472 | if (!container) |
473 | return ERR_PTR(error: -ENOMEM); |
474 | |
475 | crtc = container + offset; |
476 | |
477 | va_start(ap, name); |
478 | ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, |
479 | name, args: ap); |
480 | va_end(ap); |
481 | if (ret) |
482 | return ERR_PTR(error: ret); |
483 | |
484 | return container; |
485 | } |
486 | EXPORT_SYMBOL(__drmm_crtc_alloc_with_planes); |
487 | |
488 | /** |
489 | * drm_crtc_cleanup - Clean up the core crtc usage |
490 | * @crtc: CRTC to cleanup |
491 | * |
492 | * This function cleans up @crtc and removes it from the DRM mode setting |
493 | * core. Note that the function does *not* free the crtc structure itself, |
494 | * this is the responsibility of the caller. |
495 | */ |
496 | void drm_crtc_cleanup(struct drm_crtc *crtc) |
497 | { |
498 | struct drm_device *dev = crtc->dev; |
499 | |
500 | /* Note that the crtc_list is considered to be static; should we |
501 | * remove the drm_crtc at runtime we would have to decrement all |
502 | * the indices on the drm_crtc after us in the crtc_list. |
503 | */ |
504 | |
505 | drm_crtc_crc_fini(crtc); |
506 | |
507 | kfree(objp: crtc->gamma_store); |
508 | crtc->gamma_store = NULL; |
509 | |
510 | drm_modeset_lock_fini(lock: &crtc->mutex); |
511 | |
512 | drm_mode_object_unregister(dev, object: &crtc->base); |
513 | list_del(entry: &crtc->head); |
514 | dev->mode_config.num_crtc--; |
515 | |
516 | WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); |
517 | if (crtc->state && crtc->funcs->atomic_destroy_state) |
518 | crtc->funcs->atomic_destroy_state(crtc, crtc->state); |
519 | |
520 | kfree(objp: crtc->name); |
521 | |
522 | memset(crtc, 0, sizeof(*crtc)); |
523 | } |
524 | EXPORT_SYMBOL(drm_crtc_cleanup); |
525 | |
526 | /** |
527 | * drm_mode_getcrtc - get CRTC configuration |
528 | * @dev: drm device for the ioctl |
529 | * @data: data pointer for the ioctl |
530 | * @file_priv: drm file for the ioctl call |
531 | * |
532 | * Construct a CRTC configuration structure to return to the user. |
533 | * |
534 | * Called by the user via ioctl. |
535 | * |
536 | * Returns: |
537 | * Zero on success, negative errno on failure. |
538 | */ |
539 | int drm_mode_getcrtc(struct drm_device *dev, |
540 | void *data, struct drm_file *file_priv) |
541 | { |
542 | struct drm_mode_crtc *crtc_resp = data; |
543 | struct drm_crtc *crtc; |
544 | struct drm_plane *plane; |
545 | |
546 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
547 | return -EOPNOTSUPP; |
548 | |
549 | crtc = drm_crtc_find(dev, file_priv, id: crtc_resp->crtc_id); |
550 | if (!crtc) |
551 | return -ENOENT; |
552 | |
553 | plane = crtc->primary; |
554 | |
555 | crtc_resp->gamma_size = crtc->gamma_size; |
556 | |
557 | drm_modeset_lock(lock: &plane->mutex, NULL); |
558 | if (plane->state && plane->state->fb) |
559 | crtc_resp->fb_id = plane->state->fb->base.id; |
560 | else if (!plane->state && plane->fb) |
561 | crtc_resp->fb_id = plane->fb->base.id; |
562 | else |
563 | crtc_resp->fb_id = 0; |
564 | |
565 | if (plane->state) { |
566 | crtc_resp->x = plane->state->src_x >> 16; |
567 | crtc_resp->y = plane->state->src_y >> 16; |
568 | } |
569 | drm_modeset_unlock(lock: &plane->mutex); |
570 | |
571 | drm_modeset_lock(lock: &crtc->mutex, NULL); |
572 | if (crtc->state) { |
573 | if (crtc->state->enable) { |
574 | drm_mode_convert_to_umode(out: &crtc_resp->mode, in: &crtc->state->mode); |
575 | crtc_resp->mode_valid = 1; |
576 | } else { |
577 | crtc_resp->mode_valid = 0; |
578 | } |
579 | } else { |
580 | crtc_resp->x = crtc->x; |
581 | crtc_resp->y = crtc->y; |
582 | |
583 | if (crtc->enabled) { |
584 | drm_mode_convert_to_umode(out: &crtc_resp->mode, in: &crtc->mode); |
585 | crtc_resp->mode_valid = 1; |
586 | |
587 | } else { |
588 | crtc_resp->mode_valid = 0; |
589 | } |
590 | } |
591 | if (!file_priv->aspect_ratio_allowed) |
592 | crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; |
593 | drm_modeset_unlock(lock: &crtc->mutex); |
594 | |
595 | return 0; |
596 | } |
597 | |
598 | static int __drm_mode_set_config_internal(struct drm_mode_set *set, |
599 | struct drm_modeset_acquire_ctx *ctx) |
600 | { |
601 | struct drm_crtc *crtc = set->crtc; |
602 | struct drm_framebuffer *fb; |
603 | struct drm_crtc *tmp; |
604 | int ret; |
605 | |
606 | WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); |
607 | |
608 | /* |
609 | * NOTE: ->set_config can also disable other crtcs (if we steal all |
610 | * connectors from it), hence we need to refcount the fbs across all |
611 | * crtcs. Atomic modeset will have saner semantics ... |
612 | */ |
613 | drm_for_each_crtc(tmp, crtc->dev) { |
614 | struct drm_plane *plane = tmp->primary; |
615 | |
616 | plane->old_fb = plane->fb; |
617 | } |
618 | |
619 | fb = set->fb; |
620 | |
621 | ret = crtc->funcs->set_config(set, ctx); |
622 | if (ret == 0) { |
623 | struct drm_plane *plane = crtc->primary; |
624 | |
625 | plane->crtc = fb ? crtc : NULL; |
626 | plane->fb = fb; |
627 | } |
628 | |
629 | drm_for_each_crtc(tmp, crtc->dev) { |
630 | struct drm_plane *plane = tmp->primary; |
631 | |
632 | if (plane->fb) |
633 | drm_framebuffer_get(fb: plane->fb); |
634 | if (plane->old_fb) |
635 | drm_framebuffer_put(fb: plane->old_fb); |
636 | plane->old_fb = NULL; |
637 | } |
638 | |
639 | return ret; |
640 | } |
641 | |
642 | /** |
643 | * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config |
644 | * @set: modeset config to set |
645 | * |
646 | * This is a little helper to wrap internal calls to the |
647 | * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is |
648 | * correct refcounting dance. |
649 | * |
650 | * This should only be used by non-atomic legacy drivers. |
651 | * |
652 | * Returns: |
653 | * Zero on success, negative errno on failure. |
654 | */ |
655 | int drm_mode_set_config_internal(struct drm_mode_set *set) |
656 | { |
657 | WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev)); |
658 | |
659 | return __drm_mode_set_config_internal(set, NULL); |
660 | } |
661 | EXPORT_SYMBOL(drm_mode_set_config_internal); |
662 | |
663 | /** |
664 | * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the |
665 | * CRTC viewport |
666 | * @crtc: CRTC that framebuffer will be displayed on |
667 | * @x: x panning |
668 | * @y: y panning |
669 | * @mode: mode that framebuffer will be displayed under |
670 | * @fb: framebuffer to check size of |
671 | */ |
672 | int drm_crtc_check_viewport(const struct drm_crtc *crtc, |
673 | int x, int y, |
674 | const struct drm_display_mode *mode, |
675 | const struct drm_framebuffer *fb) |
676 | |
677 | { |
678 | int hdisplay, vdisplay; |
679 | |
680 | drm_mode_get_hv_timing(mode, hdisplay: &hdisplay, vdisplay: &vdisplay); |
681 | |
682 | if (crtc->state && |
683 | drm_rotation_90_or_270(rotation: crtc->primary->state->rotation)) |
684 | swap(hdisplay, vdisplay); |
685 | |
686 | return drm_framebuffer_check_src_coords(src_x: x << 16, src_y: y << 16, |
687 | src_w: hdisplay << 16, src_h: vdisplay << 16, |
688 | fb); |
689 | } |
690 | EXPORT_SYMBOL(drm_crtc_check_viewport); |
691 | |
692 | /** |
693 | * drm_mode_setcrtc - set CRTC configuration |
694 | * @dev: drm device for the ioctl |
695 | * @data: data pointer for the ioctl |
696 | * @file_priv: drm file for the ioctl call |
697 | * |
698 | * Build a new CRTC configuration based on user request. |
699 | * |
700 | * Called by the user via ioctl. |
701 | * |
702 | * Returns: |
703 | * Zero on success, negative errno on failure. |
704 | */ |
705 | int drm_mode_setcrtc(struct drm_device *dev, void *data, |
706 | struct drm_file *file_priv) |
707 | { |
708 | struct drm_mode_config *config = &dev->mode_config; |
709 | struct drm_mode_crtc *crtc_req = data; |
710 | struct drm_crtc *crtc; |
711 | struct drm_plane *plane; |
712 | struct drm_connector **connector_set = NULL, *connector; |
713 | struct drm_framebuffer *fb = NULL; |
714 | struct drm_display_mode *mode = NULL; |
715 | struct drm_mode_set set; |
716 | uint32_t __user *set_connectors_ptr; |
717 | struct drm_modeset_acquire_ctx ctx; |
718 | int ret; |
719 | int i; |
720 | |
721 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
722 | return -EOPNOTSUPP; |
723 | |
724 | /* |
725 | * Universal plane src offsets are only 16.16, prevent havoc for |
726 | * drivers using universal plane code internally. |
727 | */ |
728 | if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) |
729 | return -ERANGE; |
730 | |
731 | crtc = drm_crtc_find(dev, file_priv, id: crtc_req->crtc_id); |
732 | if (!crtc) { |
733 | DRM_DEBUG_KMS("Unknown CRTC ID %d\n" , crtc_req->crtc_id); |
734 | return -ENOENT; |
735 | } |
736 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n" , crtc->base.id, crtc->name); |
737 | |
738 | plane = crtc->primary; |
739 | |
740 | /* allow disabling with the primary plane leased */ |
741 | if (crtc_req->mode_valid && !drm_lease_held(file_priv, id: plane->base.id)) |
742 | return -EACCES; |
743 | |
744 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, |
745 | DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret); |
746 | |
747 | if (crtc_req->mode_valid) { |
748 | /* If we have a mode we need a framebuffer. */ |
749 | /* If we pass -1, set the mode with the currently bound fb */ |
750 | if (crtc_req->fb_id == -1) { |
751 | struct drm_framebuffer *old_fb; |
752 | |
753 | if (plane->state) |
754 | old_fb = plane->state->fb; |
755 | else |
756 | old_fb = plane->fb; |
757 | |
758 | if (!old_fb) { |
759 | DRM_DEBUG_KMS("CRTC doesn't have current FB\n" ); |
760 | ret = -EINVAL; |
761 | goto out; |
762 | } |
763 | |
764 | fb = old_fb; |
765 | /* Make refcounting symmetric with the lookup path. */ |
766 | drm_framebuffer_get(fb); |
767 | } else { |
768 | fb = drm_framebuffer_lookup(dev, file_priv, id: crtc_req->fb_id); |
769 | if (!fb) { |
770 | DRM_DEBUG_KMS("Unknown FB ID%d\n" , |
771 | crtc_req->fb_id); |
772 | ret = -ENOENT; |
773 | goto out; |
774 | } |
775 | } |
776 | |
777 | mode = drm_mode_create(dev); |
778 | if (!mode) { |
779 | ret = -ENOMEM; |
780 | goto out; |
781 | } |
782 | if (!file_priv->aspect_ratio_allowed && |
783 | (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) { |
784 | DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n" ); |
785 | ret = -EINVAL; |
786 | goto out; |
787 | } |
788 | |
789 | |
790 | ret = drm_mode_convert_umode(dev, out: mode, in: &crtc_req->mode); |
791 | if (ret) { |
792 | DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n" , |
793 | ret, drm_get_mode_status_name(mode->status)); |
794 | drm_mode_debug_printmodeline(mode); |
795 | goto out; |
796 | } |
797 | |
798 | /* |
799 | * Check whether the primary plane supports the fb pixel format. |
800 | * Drivers not implementing the universal planes API use a |
801 | * default formats list provided by the DRM core which doesn't |
802 | * match real hardware capabilities. Skip the check in that |
803 | * case. |
804 | */ |
805 | if (!plane->format_default) { |
806 | ret = drm_plane_check_pixel_format(plane, |
807 | format: fb->format->format, |
808 | modifier: fb->modifier); |
809 | if (ret) { |
810 | DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n" , |
811 | &fb->format->format, |
812 | fb->modifier); |
813 | goto out; |
814 | } |
815 | } |
816 | |
817 | ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, |
818 | mode, fb); |
819 | if (ret) |
820 | goto out; |
821 | |
822 | } |
823 | |
824 | if (crtc_req->count_connectors == 0 && mode) { |
825 | DRM_DEBUG_KMS("Count connectors is 0 but mode set\n" ); |
826 | ret = -EINVAL; |
827 | goto out; |
828 | } |
829 | |
830 | if (crtc_req->count_connectors > 0 && (!mode || !fb)) { |
831 | DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n" , |
832 | crtc_req->count_connectors); |
833 | ret = -EINVAL; |
834 | goto out; |
835 | } |
836 | |
837 | if (crtc_req->count_connectors > 0) { |
838 | u32 out_id; |
839 | |
840 | /* Avoid unbounded kernel memory allocation */ |
841 | if (crtc_req->count_connectors > config->num_connector) { |
842 | ret = -EINVAL; |
843 | goto out; |
844 | } |
845 | |
846 | connector_set = kmalloc_array(n: crtc_req->count_connectors, |
847 | size: sizeof(struct drm_connector *), |
848 | GFP_KERNEL); |
849 | if (!connector_set) { |
850 | ret = -ENOMEM; |
851 | goto out; |
852 | } |
853 | |
854 | for (i = 0; i < crtc_req->count_connectors; i++) { |
855 | connector_set[i] = NULL; |
856 | set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; |
857 | if (get_user(out_id, &set_connectors_ptr[i])) { |
858 | ret = -EFAULT; |
859 | goto out; |
860 | } |
861 | |
862 | connector = drm_connector_lookup(dev, file_priv, id: out_id); |
863 | if (!connector) { |
864 | DRM_DEBUG_KMS("Connector id %d unknown\n" , |
865 | out_id); |
866 | ret = -ENOENT; |
867 | goto out; |
868 | } |
869 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n" , |
870 | connector->base.id, |
871 | connector->name); |
872 | |
873 | connector_set[i] = connector; |
874 | } |
875 | } |
876 | |
877 | set.crtc = crtc; |
878 | set.x = crtc_req->x; |
879 | set.y = crtc_req->y; |
880 | set.mode = mode; |
881 | set.connectors = connector_set; |
882 | set.num_connectors = crtc_req->count_connectors; |
883 | set.fb = fb; |
884 | |
885 | if (drm_drv_uses_atomic_modeset(dev)) |
886 | ret = crtc->funcs->set_config(&set, &ctx); |
887 | else |
888 | ret = __drm_mode_set_config_internal(set: &set, ctx: &ctx); |
889 | |
890 | out: |
891 | if (fb) |
892 | drm_framebuffer_put(fb); |
893 | |
894 | if (connector_set) { |
895 | for (i = 0; i < crtc_req->count_connectors; i++) { |
896 | if (connector_set[i]) |
897 | drm_connector_put(connector: connector_set[i]); |
898 | } |
899 | } |
900 | kfree(objp: connector_set); |
901 | drm_mode_destroy(dev, mode); |
902 | |
903 | /* In case we need to retry... */ |
904 | connector_set = NULL; |
905 | fb = NULL; |
906 | mode = NULL; |
907 | |
908 | DRM_MODESET_LOCK_ALL_END(dev, ctx, ret); |
909 | |
910 | return ret; |
911 | } |
912 | |
913 | int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, |
914 | struct drm_property *property, |
915 | uint64_t value) |
916 | { |
917 | int ret = -EINVAL; |
918 | struct drm_crtc *crtc = obj_to_crtc(obj); |
919 | |
920 | if (crtc->funcs->set_property) |
921 | ret = crtc->funcs->set_property(crtc, property, value); |
922 | if (!ret) |
923 | drm_object_property_set_value(obj, property, val: value); |
924 | |
925 | return ret; |
926 | } |
927 | |
928 | /** |
929 | * drm_crtc_create_scaling_filter_property - create a new scaling filter |
930 | * property |
931 | * |
932 | * @crtc: drm CRTC |
933 | * @supported_filters: bitmask of supported scaling filters, must include |
934 | * BIT(DRM_SCALING_FILTER_DEFAULT). |
935 | * |
936 | * This function lets driver to enable the scaling filter property on a given |
937 | * CRTC. |
938 | * |
939 | * RETURNS: |
940 | * Zero for success or -errno |
941 | */ |
942 | int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, |
943 | unsigned int supported_filters) |
944 | { |
945 | struct drm_property *prop = |
946 | drm_create_scaling_filter_prop(dev: crtc->dev, supported_filters); |
947 | |
948 | if (IS_ERR(ptr: prop)) |
949 | return PTR_ERR(ptr: prop); |
950 | |
951 | drm_object_attach_property(obj: &crtc->base, property: prop, |
952 | init_val: DRM_SCALING_FILTER_DEFAULT); |
953 | crtc->scaling_filter_property = prop; |
954 | |
955 | return 0; |
956 | } |
957 | EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property); |
958 | |