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