1 /*
2 * Copyright (c) 2016 Intel Corporation
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23 #include <linux/uaccess.h>
24
25 #include <drm/drm_drv.h>
26 #include <drm/drm_encoder.h>
27 #include <drm/drm_file.h>
28 #include <drm/drm_framebuffer.h>
29 #include <drm/drm_managed.h>
30 #include <drm/drm_mode_config.h>
31 #include <drm/drm_print.h>
32 #include <linux/dma-resv.h>
33
34 #include "drm_crtc_internal.h"
35 #include "drm_internal.h"
36
drm_modeset_register_all(struct drm_device * dev)37 int drm_modeset_register_all(struct drm_device *dev)
38 {
39 int ret;
40
41 ret = drm_plane_register_all(dev);
42 if (ret)
43 goto err_plane;
44
45 ret = drm_crtc_register_all(dev);
46 if (ret)
47 goto err_crtc;
48
49 ret = drm_encoder_register_all(dev);
50 if (ret)
51 goto err_encoder;
52
53 ret = drm_connector_register_all(dev);
54 if (ret)
55 goto err_connector;
56
57 drm_debugfs_late_register(dev);
58
59 return 0;
60
61 err_connector:
62 drm_encoder_unregister_all(dev);
63 err_encoder:
64 drm_crtc_unregister_all(dev);
65 err_crtc:
66 drm_plane_unregister_all(dev);
67 err_plane:
68 return ret;
69 }
70
drm_modeset_unregister_all(struct drm_device * dev)71 void drm_modeset_unregister_all(struct drm_device *dev)
72 {
73 drm_connector_unregister_all(dev);
74 drm_encoder_unregister_all(dev);
75 drm_crtc_unregister_all(dev);
76 drm_plane_unregister_all(dev);
77 }
78
79 /**
80 * drm_mode_getresources - get graphics configuration
81 * @dev: drm device for the ioctl
82 * @data: data pointer for the ioctl
83 * @file_priv: drm file for the ioctl call
84 *
85 * Construct a set of configuration description structures and return
86 * them to the user, including CRTC, connector and framebuffer configuration.
87 *
88 * Called by the user via ioctl.
89 *
90 * Returns:
91 * Zero on success, negative errno on failure.
92 */
drm_mode_getresources(struct drm_device * dev,void * data,struct drm_file * file_priv)93 int drm_mode_getresources(struct drm_device *dev, void *data,
94 struct drm_file *file_priv)
95 {
96 struct drm_mode_card_res *card_res = data;
97 struct drm_framebuffer *fb;
98 struct drm_connector *connector;
99 struct drm_crtc *crtc;
100 struct drm_encoder *encoder;
101 int count, ret = 0;
102 uint32_t __user *fb_id;
103 uint32_t __user *crtc_id;
104 uint32_t __user *connector_id;
105 uint32_t __user *encoder_id;
106 struct drm_connector_list_iter conn_iter;
107
108 if (!drm_core_check_feature(dev, DRIVER_MODESET))
109 return -EOPNOTSUPP;
110
111 mutex_lock(&file_priv->fbs_lock);
112 count = 0;
113 fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
114 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
115 if (count < card_res->count_fbs &&
116 put_user(fb->base.id, fb_id + count)) {
117 mutex_unlock(&file_priv->fbs_lock);
118 return -EFAULT;
119 }
120 count++;
121 }
122 card_res->count_fbs = count;
123 mutex_unlock(&file_priv->fbs_lock);
124
125 card_res->max_height = dev->mode_config.max_height;
126 card_res->min_height = dev->mode_config.min_height;
127 card_res->max_width = dev->mode_config.max_width;
128 card_res->min_width = dev->mode_config.min_width;
129
130 count = 0;
131 crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
132 drm_for_each_crtc(crtc, dev) {
133 if (drm_lease_held(file_priv, crtc->base.id)) {
134 if (count < card_res->count_crtcs &&
135 put_user(crtc->base.id, crtc_id + count))
136 return -EFAULT;
137 count++;
138 }
139 }
140 card_res->count_crtcs = count;
141
142 count = 0;
143 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
144 drm_for_each_encoder(encoder, dev) {
145 if (count < card_res->count_encoders &&
146 put_user(encoder->base.id, encoder_id + count))
147 return -EFAULT;
148 count++;
149 }
150 card_res->count_encoders = count;
151
152 drm_connector_list_iter_begin(dev, &conn_iter);
153 count = 0;
154 connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
155 drm_for_each_connector_iter(connector, &conn_iter) {
156 /* only expose writeback connectors if userspace understands them */
157 if (!file_priv->writeback_connectors &&
158 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
159 continue;
160
161 if (drm_lease_held(file_priv, connector->base.id)) {
162 if (count < card_res->count_connectors &&
163 put_user(connector->base.id, connector_id + count)) {
164 drm_connector_list_iter_end(&conn_iter);
165 return -EFAULT;
166 }
167 count++;
168 }
169 }
170 card_res->count_connectors = count;
171 drm_connector_list_iter_end(&conn_iter);
172
173 return ret;
174 }
175
176 /**
177 * drm_mode_config_reset - call ->reset callbacks
178 * @dev: drm device
179 *
180 * This functions calls all the crtc's, encoder's and connector's ->reset
181 * callback. Drivers can use this in e.g. their driver load or resume code to
182 * reset hardware and software state.
183 */
drm_mode_config_reset(struct drm_device * dev)184 void drm_mode_config_reset(struct drm_device *dev)
185 {
186 struct drm_crtc *crtc;
187 struct drm_plane *plane;
188 struct drm_encoder *encoder;
189 struct drm_connector *connector;
190 struct drm_connector_list_iter conn_iter;
191
192 drm_for_each_plane(plane, dev)
193 if (plane->funcs->reset)
194 plane->funcs->reset(plane);
195
196 drm_for_each_crtc(crtc, dev)
197 if (crtc->funcs->reset)
198 crtc->funcs->reset(crtc);
199
200 drm_for_each_encoder(encoder, dev)
201 if (encoder->funcs && encoder->funcs->reset)
202 encoder->funcs->reset(encoder);
203
204 drm_connector_list_iter_begin(dev, &conn_iter);
205 drm_for_each_connector_iter(connector, &conn_iter)
206 if (connector->funcs->reset)
207 connector->funcs->reset(connector);
208 drm_connector_list_iter_end(&conn_iter);
209 }
210 EXPORT_SYMBOL(drm_mode_config_reset);
211
212 /*
213 * Global properties
214 */
215 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
216 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
217 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
218 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
219 };
220
drm_mode_create_standard_properties(struct drm_device * dev)221 static int drm_mode_create_standard_properties(struct drm_device *dev)
222 {
223 struct drm_property *prop;
224 int ret;
225
226 ret = drm_connector_create_standard_properties(dev);
227 if (ret)
228 return ret;
229
230 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
231 "type", drm_plane_type_enum_list,
232 ARRAY_SIZE(drm_plane_type_enum_list));
233 if (!prop)
234 return -ENOMEM;
235 dev->mode_config.plane_type_property = prop;
236
237 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
238 "SRC_X", 0, UINT_MAX);
239 if (!prop)
240 return -ENOMEM;
241 dev->mode_config.prop_src_x = prop;
242
243 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
244 "SRC_Y", 0, UINT_MAX);
245 if (!prop)
246 return -ENOMEM;
247 dev->mode_config.prop_src_y = prop;
248
249 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
250 "SRC_W", 0, UINT_MAX);
251 if (!prop)
252 return -ENOMEM;
253 dev->mode_config.prop_src_w = prop;
254
255 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
256 "SRC_H", 0, UINT_MAX);
257 if (!prop)
258 return -ENOMEM;
259 dev->mode_config.prop_src_h = prop;
260
261 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
262 "CRTC_X", INT_MIN, INT_MAX);
263 if (!prop)
264 return -ENOMEM;
265 dev->mode_config.prop_crtc_x = prop;
266
267 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
268 "CRTC_Y", INT_MIN, INT_MAX);
269 if (!prop)
270 return -ENOMEM;
271 dev->mode_config.prop_crtc_y = prop;
272
273 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
274 "CRTC_W", 0, INT_MAX);
275 if (!prop)
276 return -ENOMEM;
277 dev->mode_config.prop_crtc_w = prop;
278
279 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
280 "CRTC_H", 0, INT_MAX);
281 if (!prop)
282 return -ENOMEM;
283 dev->mode_config.prop_crtc_h = prop;
284
285 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
286 "FB_ID", DRM_MODE_OBJECT_FB);
287 if (!prop)
288 return -ENOMEM;
289 dev->mode_config.prop_fb_id = prop;
290
291 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
292 "IN_FENCE_FD", -1, INT_MAX);
293 if (!prop)
294 return -ENOMEM;
295 dev->mode_config.prop_in_fence_fd = prop;
296
297 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
298 "OUT_FENCE_PTR", 0, U64_MAX);
299 if (!prop)
300 return -ENOMEM;
301 dev->mode_config.prop_out_fence_ptr = prop;
302
303 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
304 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
305 if (!prop)
306 return -ENOMEM;
307 dev->mode_config.prop_crtc_id = prop;
308
309 prop = drm_property_create(dev,
310 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
311 "FB_DAMAGE_CLIPS", 0);
312 if (!prop)
313 return -ENOMEM;
314 dev->mode_config.prop_fb_damage_clips = prop;
315
316 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
317 "ACTIVE");
318 if (!prop)
319 return -ENOMEM;
320 dev->mode_config.prop_active = prop;
321
322 prop = drm_property_create(dev,
323 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
324 "MODE_ID", 0);
325 if (!prop)
326 return -ENOMEM;
327 dev->mode_config.prop_mode_id = prop;
328
329 prop = drm_property_create_bool(dev, 0,
330 "VRR_ENABLED");
331 if (!prop)
332 return -ENOMEM;
333 dev->mode_config.prop_vrr_enabled = prop;
334
335 prop = drm_property_create(dev,
336 DRM_MODE_PROP_BLOB,
337 "DEGAMMA_LUT", 0);
338 if (!prop)
339 return -ENOMEM;
340 dev->mode_config.degamma_lut_property = prop;
341
342 prop = drm_property_create_range(dev,
343 DRM_MODE_PROP_IMMUTABLE,
344 "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
345 if (!prop)
346 return -ENOMEM;
347 dev->mode_config.degamma_lut_size_property = prop;
348
349 prop = drm_property_create(dev,
350 DRM_MODE_PROP_BLOB,
351 "CTM", 0);
352 if (!prop)
353 return -ENOMEM;
354 dev->mode_config.ctm_property = prop;
355
356 prop = drm_property_create(dev,
357 DRM_MODE_PROP_BLOB,
358 "GAMMA_LUT", 0);
359 if (!prop)
360 return -ENOMEM;
361 dev->mode_config.gamma_lut_property = prop;
362
363 prop = drm_property_create_range(dev,
364 DRM_MODE_PROP_IMMUTABLE,
365 "GAMMA_LUT_SIZE", 0, UINT_MAX);
366 if (!prop)
367 return -ENOMEM;
368 dev->mode_config.gamma_lut_size_property = prop;
369
370 prop = drm_property_create(dev,
371 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
372 "IN_FORMATS", 0);
373 if (!prop)
374 return -ENOMEM;
375 dev->mode_config.modifiers_property = prop;
376
377 return 0;
378 }
379
drm_mode_config_init_release(struct drm_device * dev,void * ptr)380 static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
381 {
382 drm_mode_config_cleanup(dev);
383 }
384
385 /**
386 * drmm_mode_config_init - managed DRM mode_configuration structure
387 * initialization
388 * @dev: DRM device
389 *
390 * Initialize @dev's mode_config structure, used for tracking the graphics
391 * configuration of @dev.
392 *
393 * Since this initializes the modeset locks, no locking is possible. Which is no
394 * problem, since this should happen single threaded at init time. It is the
395 * driver's problem to ensure this guarantee.
396 *
397 * Cleanup is automatically handled through registering drm_mode_config_cleanup
398 * with drmm_add_action().
399 *
400 * Returns: 0 on success, negative error value on failure.
401 */
drmm_mode_config_init(struct drm_device * dev)402 int drmm_mode_config_init(struct drm_device *dev)
403 {
404 int ret;
405
406 mutex_init(&dev->mode_config.mutex);
407 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
408 mutex_init(&dev->mode_config.idr_mutex);
409 mutex_init(&dev->mode_config.fb_lock);
410 mutex_init(&dev->mode_config.blob_lock);
411 INIT_LIST_HEAD(&dev->mode_config.fb_list);
412 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
413 INIT_LIST_HEAD(&dev->mode_config.connector_list);
414 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
415 INIT_LIST_HEAD(&dev->mode_config.property_list);
416 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
417 INIT_LIST_HEAD(&dev->mode_config.plane_list);
418 INIT_LIST_HEAD(&dev->mode_config.privobj_list);
419 idr_init_base(&dev->mode_config.object_idr, 1);
420 idr_init_base(&dev->mode_config.tile_idr, 1);
421 ida_init(&dev->mode_config.connector_ida);
422 spin_lock_init(&dev->mode_config.connector_list_lock);
423
424 init_llist_head(&dev->mode_config.connector_free_list);
425 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
426
427 ret = drm_mode_create_standard_properties(dev);
428 if (ret) {
429 drm_mode_config_cleanup(dev);
430 return ret;
431 }
432
433 /* Just to be sure */
434 dev->mode_config.num_fb = 0;
435 dev->mode_config.num_connector = 0;
436 dev->mode_config.num_crtc = 0;
437 dev->mode_config.num_encoder = 0;
438 dev->mode_config.num_total_plane = 0;
439
440 if (IS_ENABLED(CONFIG_LOCKDEP)) {
441 struct drm_modeset_acquire_ctx modeset_ctx;
442 struct ww_acquire_ctx resv_ctx;
443 struct dma_resv resv;
444 int ret;
445
446 dma_resv_init(&resv);
447
448 drm_modeset_acquire_init(&modeset_ctx, 0);
449 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
450 &modeset_ctx);
451 if (ret == -EDEADLK)
452 ret = drm_modeset_backoff(&modeset_ctx);
453
454 ww_acquire_init(&resv_ctx, &reservation_ww_class);
455 ret = dma_resv_lock(&resv, &resv_ctx);
456 if (ret == -EDEADLK)
457 dma_resv_lock_slow(&resv, &resv_ctx);
458
459 dma_resv_unlock(&resv);
460 ww_acquire_fini(&resv_ctx);
461
462 drm_modeset_drop_locks(&modeset_ctx);
463 drm_modeset_acquire_fini(&modeset_ctx);
464 dma_resv_fini(&resv);
465 }
466
467 return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
468 NULL);
469 }
470 EXPORT_SYMBOL(drmm_mode_config_init);
471
472 /**
473 * drm_mode_config_cleanup - free up DRM mode_config info
474 * @dev: DRM device
475 *
476 * Free up all the connectors and CRTCs associated with this DRM device, then
477 * free up the framebuffers and associated buffer objects.
478 *
479 * Note that since this /should/ happen single-threaded at driver/device
480 * teardown time, no locking is required. It's the driver's job to ensure that
481 * this guarantee actually holds true.
482 *
483 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
484 * drivers to explicitly call this function.
485 */
drm_mode_config_cleanup(struct drm_device * dev)486 void drm_mode_config_cleanup(struct drm_device *dev)
487 {
488 struct drm_connector *connector;
489 struct drm_connector_list_iter conn_iter;
490 struct drm_crtc *crtc, *ct;
491 struct drm_encoder *encoder, *enct;
492 struct drm_framebuffer *fb, *fbt;
493 struct drm_property *property, *pt;
494 struct drm_property_blob *blob, *bt;
495 struct drm_plane *plane, *plt;
496
497 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
498 head) {
499 encoder->funcs->destroy(encoder);
500 }
501
502 drm_connector_list_iter_begin(dev, &conn_iter);
503 drm_for_each_connector_iter(connector, &conn_iter) {
504 /* drm_connector_list_iter holds an full reference to the
505 * current connector itself, which means it is inherently safe
506 * against unreferencing the current connector - but not against
507 * deleting it right away. */
508 drm_connector_put(connector);
509 }
510 drm_connector_list_iter_end(&conn_iter);
511 /* connector_iter drops references in a work item. */
512 flush_work(&dev->mode_config.connector_free_work);
513 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
514 drm_connector_list_iter_begin(dev, &conn_iter);
515 drm_for_each_connector_iter(connector, &conn_iter)
516 DRM_ERROR("connector %s leaked!\n", connector->name);
517 drm_connector_list_iter_end(&conn_iter);
518 }
519
520 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
521 head) {
522 drm_property_destroy(dev, property);
523 }
524
525 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
526 head) {
527 plane->funcs->destroy(plane);
528 }
529
530 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
531 crtc->funcs->destroy(crtc);
532 }
533
534 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
535 head_global) {
536 drm_property_blob_put(blob);
537 }
538
539 /*
540 * Single-threaded teardown context, so it's not required to grab the
541 * fb_lock to protect against concurrent fb_list access. Contrary, it
542 * would actually deadlock with the drm_framebuffer_cleanup function.
543 *
544 * Also, if there are any framebuffers left, that's a driver leak now,
545 * so politely WARN about this.
546 */
547 WARN_ON(!list_empty(&dev->mode_config.fb_list));
548 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
549 struct drm_printer p = drm_debug_printer("[leaked fb]");
550
551 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
552 drm_framebuffer_print_info(&p, 1, fb);
553 drm_framebuffer_free(&fb->base.refcount);
554 }
555
556 ida_destroy(&dev->mode_config.connector_ida);
557 idr_destroy(&dev->mode_config.tile_idr);
558 idr_destroy(&dev->mode_config.object_idr);
559 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
560 }
561 EXPORT_SYMBOL(drm_mode_config_cleanup);
562
full_encoder_mask(struct drm_device * dev)563 static u32 full_encoder_mask(struct drm_device *dev)
564 {
565 struct drm_encoder *encoder;
566 u32 encoder_mask = 0;
567
568 drm_for_each_encoder(encoder, dev)
569 encoder_mask |= drm_encoder_mask(encoder);
570
571 return encoder_mask;
572 }
573
574 /*
575 * For some reason we want the encoder itself included in
576 * possible_clones. Make life easy for drivers by allowing them
577 * to leave possible_clones unset if no cloning is possible.
578 */
fixup_encoder_possible_clones(struct drm_encoder * encoder)579 static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
580 {
581 if (encoder->possible_clones == 0)
582 encoder->possible_clones = drm_encoder_mask(encoder);
583 }
584
validate_encoder_possible_clones(struct drm_encoder * encoder)585 static void validate_encoder_possible_clones(struct drm_encoder *encoder)
586 {
587 struct drm_device *dev = encoder->dev;
588 u32 encoder_mask = full_encoder_mask(dev);
589 struct drm_encoder *other;
590
591 drm_for_each_encoder(other, dev) {
592 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
593 !!(other->possible_clones & drm_encoder_mask(encoder)),
594 "possible_clones mismatch: "
595 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
596 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
597 encoder->base.id, encoder->name,
598 drm_encoder_mask(encoder), encoder->possible_clones,
599 other->base.id, other->name,
600 drm_encoder_mask(other), other->possible_clones);
601 }
602
603 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
604 (encoder->possible_clones & ~encoder_mask) != 0,
605 "Bogus possible_clones: "
606 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
607 encoder->base.id, encoder->name,
608 encoder->possible_clones, encoder_mask);
609 }
610
full_crtc_mask(struct drm_device * dev)611 static u32 full_crtc_mask(struct drm_device *dev)
612 {
613 struct drm_crtc *crtc;
614 u32 crtc_mask = 0;
615
616 drm_for_each_crtc(crtc, dev)
617 crtc_mask |= drm_crtc_mask(crtc);
618
619 return crtc_mask;
620 }
621
validate_encoder_possible_crtcs(struct drm_encoder * encoder)622 static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
623 {
624 u32 crtc_mask = full_crtc_mask(encoder->dev);
625
626 WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
627 (encoder->possible_crtcs & ~crtc_mask) != 0,
628 "Bogus possible_crtcs: "
629 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
630 encoder->base.id, encoder->name,
631 encoder->possible_crtcs, crtc_mask);
632 }
633
drm_mode_config_validate(struct drm_device * dev)634 void drm_mode_config_validate(struct drm_device *dev)
635 {
636 struct drm_encoder *encoder;
637 struct drm_crtc *crtc;
638 struct drm_plane *plane;
639 u32 primary_with_crtc = 0, cursor_with_crtc = 0;
640 unsigned int num_primary = 0;
641
642 if (!drm_core_check_feature(dev, DRIVER_MODESET))
643 return;
644
645 drm_for_each_encoder(encoder, dev)
646 fixup_encoder_possible_clones(encoder);
647
648 drm_for_each_encoder(encoder, dev) {
649 validate_encoder_possible_clones(encoder);
650 validate_encoder_possible_crtcs(encoder);
651 }
652
653 drm_for_each_crtc(crtc, dev) {
654 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
655 crtc->base.id, crtc->name);
656
657 WARN(crtc->cursor && crtc->funcs->cursor_set,
658 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
659 crtc->base.id, crtc->name);
660 WARN(crtc->cursor && crtc->funcs->cursor_set2,
661 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
662 crtc->base.id, crtc->name);
663 WARN(crtc->cursor && crtc->funcs->cursor_move,
664 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
665 crtc->base.id, crtc->name);
666
667 if (crtc->primary) {
668 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
669 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
670 crtc->primary->base.id, crtc->primary->name,
671 crtc->base.id, crtc->name);
672 WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
673 "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
674 crtc->primary->base.id, crtc->primary->name);
675 primary_with_crtc |= drm_plane_mask(crtc->primary);
676 }
677 if (crtc->cursor) {
678 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
679 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
680 crtc->cursor->base.id, crtc->cursor->name,
681 crtc->base.id, crtc->name);
682 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
683 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
684 crtc->cursor->base.id, crtc->cursor->name);
685 cursor_with_crtc |= drm_plane_mask(crtc->cursor);
686 }
687 }
688
689 drm_for_each_plane(plane, dev) {
690 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
691 num_primary++;
692 }
693
694 WARN(num_primary != dev->mode_config.num_crtc,
695 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
696 num_primary, dev->mode_config.num_crtc);
697 }
698