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