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 return 0;
58
59 err_connector:
60 drm_encoder_unregister_all(dev);
61 err_encoder:
62 drm_crtc_unregister_all(dev);
63 err_crtc:
64 drm_plane_unregister_all(dev);
65 err_plane:
66 return ret;
67 }
68
drm_modeset_unregister_all(struct drm_device * dev)69 void drm_modeset_unregister_all(struct drm_device *dev)
70 {
71 drm_connector_unregister_all(dev);
72 drm_encoder_unregister_all(dev);
73 drm_crtc_unregister_all(dev);
74 drm_plane_unregister_all(dev);
75 }
76
77 /**
78 * drm_mode_getresources - get graphics configuration
79 * @dev: drm device for the ioctl
80 * @data: data pointer for the ioctl
81 * @file_priv: drm file for the ioctl call
82 *
83 * Construct a set of configuration description structures and return
84 * them to the user, including CRTC, connector and framebuffer configuration.
85 *
86 * Called by the user via ioctl.
87 *
88 * Returns:
89 * Zero on success, negative errno on failure.
90 */
drm_mode_getresources(struct drm_device * dev,void * data,struct drm_file * file_priv)91 int drm_mode_getresources(struct drm_device *dev, void *data,
92 struct drm_file *file_priv)
93 {
94 struct drm_mode_card_res *card_res = data;
95 struct drm_framebuffer *fb;
96 struct drm_connector *connector;
97 struct drm_crtc *crtc;
98 struct drm_encoder *encoder;
99 int count, ret = 0;
100 uint32_t __user *fb_id;
101 uint32_t __user *crtc_id;
102 uint32_t __user *connector_id;
103 uint32_t __user *encoder_id;
104 struct drm_connector_list_iter conn_iter;
105
106 if (!drm_core_check_feature(dev, DRIVER_MODESET))
107 return -EOPNOTSUPP;
108
109 mutex_lock(&file_priv->fbs_lock);
110 count = 0;
111 fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
112 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
113 if (count < card_res->count_fbs &&
114 put_user(fb->base.id, fb_id + count)) {
115 mutex_unlock(&file_priv->fbs_lock);
116 return -EFAULT;
117 }
118 count++;
119 }
120 card_res->count_fbs = count;
121 mutex_unlock(&file_priv->fbs_lock);
122
123 card_res->max_height = dev->mode_config.max_height;
124 card_res->min_height = dev->mode_config.min_height;
125 card_res->max_width = dev->mode_config.max_width;
126 card_res->min_width = dev->mode_config.min_width;
127
128 count = 0;
129 crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
130 drm_for_each_crtc(crtc, dev) {
131 if (drm_lease_held(file_priv, crtc->base.id)) {
132 if (count < card_res->count_crtcs &&
133 put_user(crtc->base.id, crtc_id + count))
134 return -EFAULT;
135 count++;
136 }
137 }
138 card_res->count_crtcs = count;
139
140 count = 0;
141 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
142 drm_for_each_encoder(encoder, dev) {
143 if (count < card_res->count_encoders &&
144 put_user(encoder->base.id, encoder_id + count))
145 return -EFAULT;
146 count++;
147 }
148 card_res->count_encoders = count;
149
150 drm_connector_list_iter_begin(dev, &conn_iter);
151 count = 0;
152 connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
153 /*
154 * FIXME: the connectors on the list may not be fully initialized yet,
155 * if the ioctl is called before the connectors are registered. (See
156 * drm_dev_register()->drm_modeset_register_all() for static and
157 * drm_connector_dynamic_register() for dynamic connectors.)
158 * The driver should only get registered after static connectors are
159 * fully initialized and dynamic connectors should be added to the
160 * connector list only after fully initializing them.
161 */
162 drm_for_each_connector_iter(connector, &conn_iter) {
163 /* only expose writeback connectors if userspace understands them */
164 if (!file_priv->writeback_connectors &&
165 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
166 continue;
167
168 if (drm_lease_held(file_priv, connector->base.id)) {
169 if (count < card_res->count_connectors &&
170 put_user(connector->base.id, connector_id + count)) {
171 drm_connector_list_iter_end(&conn_iter);
172 return -EFAULT;
173 }
174 count++;
175 }
176 }
177 card_res->count_connectors = count;
178 drm_connector_list_iter_end(&conn_iter);
179
180 return ret;
181 }
182
183 /**
184 * drm_mode_config_reset - call ->reset callbacks
185 * @dev: drm device
186 *
187 * This functions calls all the crtc's, encoder's and connector's ->reset
188 * callback. Drivers can use this in e.g. their driver load or resume code to
189 * reset hardware and software state.
190 */
drm_mode_config_reset(struct drm_device * dev)191 void drm_mode_config_reset(struct drm_device *dev)
192 {
193 struct drm_crtc *crtc;
194 struct drm_plane *plane;
195 struct drm_encoder *encoder;
196 struct drm_connector *connector;
197 struct drm_connector_list_iter conn_iter;
198
199 drm_for_each_plane(plane, dev)
200 if (plane->funcs->reset)
201 plane->funcs->reset(plane);
202
203 drm_for_each_crtc(crtc, dev)
204 if (crtc->funcs->reset)
205 crtc->funcs->reset(crtc);
206
207 drm_for_each_encoder(encoder, dev)
208 if (encoder->funcs && encoder->funcs->reset)
209 encoder->funcs->reset(encoder);
210
211 drm_connector_list_iter_begin(dev, &conn_iter);
212 drm_for_each_connector_iter(connector, &conn_iter)
213 if (connector->funcs->reset)
214 connector->funcs->reset(connector);
215 drm_connector_list_iter_end(&conn_iter);
216 }
217 EXPORT_SYMBOL(drm_mode_config_reset);
218
219 /*
220 * Global properties
221 */
222 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
223 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
224 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
225 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
226 };
227
drm_mode_create_standard_properties(struct drm_device * dev)228 static int drm_mode_create_standard_properties(struct drm_device *dev)
229 {
230 struct drm_property *prop;
231 int ret;
232
233 ret = drm_connector_create_standard_properties(dev);
234 if (ret)
235 return ret;
236
237 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
238 "type", drm_plane_type_enum_list,
239 ARRAY_SIZE(drm_plane_type_enum_list));
240 if (!prop)
241 return -ENOMEM;
242 dev->mode_config.plane_type_property = prop;
243
244 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
245 "SRC_X", 0, UINT_MAX);
246 if (!prop)
247 return -ENOMEM;
248 dev->mode_config.prop_src_x = prop;
249
250 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
251 "SRC_Y", 0, UINT_MAX);
252 if (!prop)
253 return -ENOMEM;
254 dev->mode_config.prop_src_y = prop;
255
256 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
257 "SRC_W", 0, UINT_MAX);
258 if (!prop)
259 return -ENOMEM;
260 dev->mode_config.prop_src_w = prop;
261
262 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
263 "SRC_H", 0, UINT_MAX);
264 if (!prop)
265 return -ENOMEM;
266 dev->mode_config.prop_src_h = prop;
267
268 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
269 "CRTC_X", INT_MIN, INT_MAX);
270 if (!prop)
271 return -ENOMEM;
272 dev->mode_config.prop_crtc_x = prop;
273
274 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
275 "CRTC_Y", INT_MIN, INT_MAX);
276 if (!prop)
277 return -ENOMEM;
278 dev->mode_config.prop_crtc_y = prop;
279
280 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
281 "CRTC_W", 0, INT_MAX);
282 if (!prop)
283 return -ENOMEM;
284 dev->mode_config.prop_crtc_w = prop;
285
286 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
287 "CRTC_H", 0, INT_MAX);
288 if (!prop)
289 return -ENOMEM;
290 dev->mode_config.prop_crtc_h = prop;
291
292 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
293 "FB_ID", DRM_MODE_OBJECT_FB);
294 if (!prop)
295 return -ENOMEM;
296 dev->mode_config.prop_fb_id = prop;
297
298 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
299 "IN_FENCE_FD", -1, INT_MAX);
300 if (!prop)
301 return -ENOMEM;
302 dev->mode_config.prop_in_fence_fd = prop;
303
304 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
305 "OUT_FENCE_PTR", 0, U64_MAX);
306 if (!prop)
307 return -ENOMEM;
308 dev->mode_config.prop_out_fence_ptr = prop;
309
310 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
311 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
312 if (!prop)
313 return -ENOMEM;
314 dev->mode_config.prop_crtc_id = prop;
315
316 prop = drm_property_create(dev,
317 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
318 "FB_DAMAGE_CLIPS", 0);
319 if (!prop)
320 return -ENOMEM;
321 dev->mode_config.prop_fb_damage_clips = prop;
322
323 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
324 "ACTIVE");
325 if (!prop)
326 return -ENOMEM;
327 dev->mode_config.prop_active = prop;
328
329 prop = drm_property_create(dev,
330 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
331 "MODE_ID", 0);
332 if (!prop)
333 return -ENOMEM;
334 dev->mode_config.prop_mode_id = prop;
335
336 prop = drm_property_create_bool(dev, 0,
337 "VRR_ENABLED");
338 if (!prop)
339 return -ENOMEM;
340 dev->mode_config.prop_vrr_enabled = prop;
341
342 prop = drm_property_create(dev,
343 DRM_MODE_PROP_BLOB,
344 "DEGAMMA_LUT", 0);
345 if (!prop)
346 return -ENOMEM;
347 dev->mode_config.degamma_lut_property = prop;
348
349 prop = drm_property_create_range(dev,
350 DRM_MODE_PROP_IMMUTABLE,
351 "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
352 if (!prop)
353 return -ENOMEM;
354 dev->mode_config.degamma_lut_size_property = prop;
355
356 prop = drm_property_create(dev,
357 DRM_MODE_PROP_BLOB,
358 "CTM", 0);
359 if (!prop)
360 return -ENOMEM;
361 dev->mode_config.ctm_property = prop;
362
363 prop = drm_property_create(dev,
364 DRM_MODE_PROP_BLOB,
365 "GAMMA_LUT", 0);
366 if (!prop)
367 return -ENOMEM;
368 dev->mode_config.gamma_lut_property = prop;
369
370 prop = drm_property_create_range(dev,
371 DRM_MODE_PROP_IMMUTABLE,
372 "GAMMA_LUT_SIZE", 0, UINT_MAX);
373 if (!prop)
374 return -ENOMEM;
375 dev->mode_config.gamma_lut_size_property = prop;
376
377 prop = drm_property_create(dev,
378 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
379 "IN_FORMATS", 0);
380 if (!prop)
381 return -ENOMEM;
382 dev->mode_config.modifiers_property = prop;
383
384 prop = drm_property_create(dev,
385 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
386 "SIZE_HINTS", 0);
387 if (!prop)
388 return -ENOMEM;
389 dev->mode_config.size_hints_property = prop;
390
391 return 0;
392 }
393
drm_mode_config_init_release(struct drm_device * dev,void * ptr)394 static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
395 {
396 drm_mode_config_cleanup(dev);
397 }
398
399 /**
400 * drmm_mode_config_init - managed DRM mode_configuration structure
401 * initialization
402 * @dev: DRM device
403 *
404 * Initialize @dev's mode_config structure, used for tracking the graphics
405 * configuration of @dev.
406 *
407 * Since this initializes the modeset locks, no locking is possible. Which is no
408 * problem, since this should happen single threaded at init time. It is the
409 * driver's problem to ensure this guarantee.
410 *
411 * Cleanup is automatically handled through registering drm_mode_config_cleanup
412 * with drmm_add_action().
413 *
414 * Returns: 0 on success, negative error value on failure.
415 */
drmm_mode_config_init(struct drm_device * dev)416 int drmm_mode_config_init(struct drm_device *dev)
417 {
418 int ret;
419
420 mutex_init(&dev->mode_config.mutex);
421 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
422 mutex_init(&dev->mode_config.idr_mutex);
423 mutex_init(&dev->mode_config.fb_lock);
424 mutex_init(&dev->mode_config.blob_lock);
425 INIT_LIST_HEAD(&dev->mode_config.fb_list);
426 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
427 INIT_LIST_HEAD(&dev->mode_config.connector_list);
428 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
429 INIT_LIST_HEAD(&dev->mode_config.property_list);
430 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
431 INIT_LIST_HEAD(&dev->mode_config.plane_list);
432 INIT_LIST_HEAD(&dev->mode_config.privobj_list);
433 idr_init_base(&dev->mode_config.object_idr, 1);
434 idr_init_base(&dev->mode_config.tile_idr, 1);
435 ida_init(&dev->mode_config.connector_ida);
436 spin_lock_init(&dev->mode_config.connector_list_lock);
437
438 init_llist_head(&dev->mode_config.connector_free_list);
439 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
440
441 ret = drm_mode_create_standard_properties(dev);
442 if (ret) {
443 drm_mode_config_cleanup(dev);
444 return ret;
445 }
446
447 /* Just to be sure */
448 dev->mode_config.num_fb = 0;
449 dev->mode_config.num_connector = 0;
450 dev->mode_config.num_crtc = 0;
451 dev->mode_config.num_encoder = 0;
452 dev->mode_config.num_total_plane = 0;
453
454 if (IS_ENABLED(CONFIG_LOCKDEP)) {
455 struct drm_modeset_acquire_ctx modeset_ctx;
456 struct ww_acquire_ctx resv_ctx;
457 struct dma_resv resv;
458 int ret;
459
460 dma_resv_init(&resv);
461
462 drm_modeset_acquire_init(&modeset_ctx, 0);
463 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
464 &modeset_ctx);
465 if (ret == -EDEADLK)
466 ret = drm_modeset_backoff(&modeset_ctx);
467
468 might_fault();
469
470 ww_acquire_init(&resv_ctx, &reservation_ww_class);
471 ret = dma_resv_lock(&resv, &resv_ctx);
472 if (ret == -EDEADLK)
473 dma_resv_lock_slow(&resv, &resv_ctx);
474
475 dma_resv_unlock(&resv);
476 ww_acquire_fini(&resv_ctx);
477
478 drm_modeset_drop_locks(&modeset_ctx);
479 drm_modeset_acquire_fini(&modeset_ctx);
480 dma_resv_fini(&resv);
481 }
482
483 return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
484 NULL);
485 }
486 EXPORT_SYMBOL(drmm_mode_config_init);
487
488 /**
489 * drm_mode_config_cleanup - free up DRM mode_config info
490 * @dev: DRM device
491 *
492 * Free up all the connectors and CRTCs associated with this DRM device, then
493 * free up the framebuffers and associated buffer objects.
494 *
495 * Note that since this /should/ happen single-threaded at driver/device
496 * teardown time, no locking is required. It's the driver's job to ensure that
497 * this guarantee actually holds true.
498 *
499 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
500 * drivers to explicitly call this function.
501 */
drm_mode_config_cleanup(struct drm_device * dev)502 void drm_mode_config_cleanup(struct drm_device *dev)
503 {
504 struct drm_connector *connector;
505 struct drm_connector_list_iter conn_iter;
506 struct drm_crtc *crtc, *ct;
507 struct drm_encoder *encoder, *enct;
508 struct drm_framebuffer *fb, *fbt;
509 struct drm_property *property, *pt;
510 struct drm_property_blob *blob, *bt;
511 struct drm_plane *plane, *plt;
512
513 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
514 head) {
515 encoder->funcs->destroy(encoder);
516 }
517
518 drm_connector_list_iter_begin(dev, &conn_iter);
519 drm_for_each_connector_iter(connector, &conn_iter) {
520 /* drm_connector_list_iter holds an full reference to the
521 * current connector itself, which means it is inherently safe
522 * against unreferencing the current connector - but not against
523 * deleting it right away. */
524 drm_connector_put(connector);
525 }
526 drm_connector_list_iter_end(&conn_iter);
527 /* connector_iter drops references in a work item. */
528 flush_work(&dev->mode_config.connector_free_work);
529 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
530 drm_connector_list_iter_begin(dev, &conn_iter);
531 drm_for_each_connector_iter(connector, &conn_iter)
532 DRM_ERROR("connector %s leaked!\n", connector->name);
533 drm_connector_list_iter_end(&conn_iter);
534 }
535
536 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
537 head) {
538 drm_property_destroy(dev, property);
539 }
540
541 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
542 head) {
543 plane->funcs->destroy(plane);
544 }
545
546 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
547 crtc->funcs->destroy(crtc);
548 }
549
550 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
551 head_global) {
552 drm_property_blob_put(blob);
553 }
554
555 /*
556 * Single-threaded teardown context, so it's not required to grab the
557 * fb_lock to protect against concurrent fb_list access. Contrary, it
558 * would actually deadlock with the drm_framebuffer_cleanup function.
559 *
560 * Also, if there are any framebuffers left, that's a driver leak now,
561 * so politely WARN about this.
562 */
563 WARN_ON(!list_empty(&dev->mode_config.fb_list));
564 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
565 struct drm_printer p = drm_dbg_printer(dev, DRM_UT_KMS, "[leaked fb]");
566
567 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
568 drm_framebuffer_print_info(&p, 1, fb);
569 drm_framebuffer_free(&fb->base.refcount);
570 }
571
572 ida_destroy(&dev->mode_config.connector_ida);
573 idr_destroy(&dev->mode_config.tile_idr);
574 idr_destroy(&dev->mode_config.object_idr);
575 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
576 }
577 EXPORT_SYMBOL(drm_mode_config_cleanup);
578
full_encoder_mask(struct drm_device * dev)579 static u32 full_encoder_mask(struct drm_device *dev)
580 {
581 struct drm_encoder *encoder;
582 u32 encoder_mask = 0;
583
584 drm_for_each_encoder(encoder, dev)
585 encoder_mask |= drm_encoder_mask(encoder);
586
587 return encoder_mask;
588 }
589
590 /*
591 * For some reason we want the encoder itself included in
592 * possible_clones. Make life easy for drivers by allowing them
593 * to leave possible_clones unset if no cloning is possible.
594 */
fixup_encoder_possible_clones(struct drm_encoder * encoder)595 static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
596 {
597 if (encoder->possible_clones == 0)
598 encoder->possible_clones = drm_encoder_mask(encoder);
599 }
600
validate_encoder_possible_clones(struct drm_encoder * encoder)601 static void validate_encoder_possible_clones(struct drm_encoder *encoder)
602 {
603 struct drm_device *dev = encoder->dev;
604 u32 encoder_mask = full_encoder_mask(dev);
605 struct drm_encoder *other;
606
607 drm_for_each_encoder(other, dev) {
608 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
609 !!(other->possible_clones & drm_encoder_mask(encoder)),
610 "possible_clones mismatch: "
611 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
612 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
613 encoder->base.id, encoder->name,
614 drm_encoder_mask(encoder), encoder->possible_clones,
615 other->base.id, other->name,
616 drm_encoder_mask(other), other->possible_clones);
617 }
618
619 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
620 (encoder->possible_clones & ~encoder_mask) != 0,
621 "Bogus possible_clones: "
622 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
623 encoder->base.id, encoder->name,
624 encoder->possible_clones, encoder_mask);
625 }
626
full_crtc_mask(struct drm_device * dev)627 static u32 full_crtc_mask(struct drm_device *dev)
628 {
629 struct drm_crtc *crtc;
630 u32 crtc_mask = 0;
631
632 drm_for_each_crtc(crtc, dev)
633 crtc_mask |= drm_crtc_mask(crtc);
634
635 return crtc_mask;
636 }
637
validate_encoder_possible_crtcs(struct drm_encoder * encoder)638 static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
639 {
640 u32 crtc_mask = full_crtc_mask(encoder->dev);
641
642 WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
643 (encoder->possible_crtcs & ~crtc_mask) != 0,
644 "Bogus possible_crtcs: "
645 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
646 encoder->base.id, encoder->name,
647 encoder->possible_crtcs, crtc_mask);
648 }
649
drm_mode_config_validate(struct drm_device * dev)650 void drm_mode_config_validate(struct drm_device *dev)
651 {
652 struct drm_encoder *encoder;
653 struct drm_crtc *crtc;
654 struct drm_plane *plane;
655 u32 primary_with_crtc = 0, cursor_with_crtc = 0;
656 unsigned int num_primary = 0;
657
658 if (!drm_core_check_feature(dev, DRIVER_MODESET))
659 return;
660
661 drm_for_each_encoder(encoder, dev)
662 fixup_encoder_possible_clones(encoder);
663
664 drm_for_each_encoder(encoder, dev) {
665 validate_encoder_possible_clones(encoder);
666 validate_encoder_possible_crtcs(encoder);
667 }
668
669 drm_for_each_crtc(crtc, dev) {
670 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
671 crtc->base.id, crtc->name);
672
673 WARN(crtc->cursor && crtc->funcs->cursor_set,
674 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
675 crtc->base.id, crtc->name);
676 WARN(crtc->cursor && crtc->funcs->cursor_set2,
677 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
678 crtc->base.id, crtc->name);
679 WARN(crtc->cursor && crtc->funcs->cursor_move,
680 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
681 crtc->base.id, crtc->name);
682
683 if (crtc->primary) {
684 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
685 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
686 crtc->primary->base.id, crtc->primary->name,
687 crtc->base.id, crtc->name);
688 WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
689 "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
690 crtc->primary->base.id, crtc->primary->name);
691 primary_with_crtc |= drm_plane_mask(crtc->primary);
692 }
693 if (crtc->cursor) {
694 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
695 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
696 crtc->cursor->base.id, crtc->cursor->name,
697 crtc->base.id, crtc->name);
698 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
699 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
700 crtc->cursor->base.id, crtc->cursor->name);
701 cursor_with_crtc |= drm_plane_mask(crtc->cursor);
702 }
703 }
704
705 drm_for_each_plane(plane, dev) {
706 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
707 num_primary++;
708 }
709
710 WARN(num_primary != dev->mode_config.num_crtc,
711 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
712 num_primary, dev->mode_config.num_crtc);
713 }
714