Loading...
Note: File does not exist in v3.1.
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
36int 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 ret = drm_crtc_register_all(dev);
45 if (ret)
46 goto err_crtc;
47
48 ret = drm_encoder_register_all(dev);
49 if (ret)
50 goto err_encoder;
51
52 ret = drm_connector_register_all(dev);
53 if (ret)
54 goto err_connector;
55
56 return 0;
57
58err_connector:
59 drm_encoder_unregister_all(dev);
60err_encoder:
61 drm_crtc_unregister_all(dev);
62err_crtc:
63 drm_plane_unregister_all(dev);
64err_plane:
65 return ret;
66}
67
68void drm_modeset_unregister_all(struct drm_device *dev)
69{
70 drm_connector_unregister_all(dev);
71 drm_encoder_unregister_all(dev);
72 drm_crtc_unregister_all(dev);
73 drm_plane_unregister_all(dev);
74}
75
76/**
77 * drm_mode_getresources - get graphics configuration
78 * @dev: drm device for the ioctl
79 * @data: data pointer for the ioctl
80 * @file_priv: drm file for the ioctl call
81 *
82 * Construct a set of configuration description structures and return
83 * them to the user, including CRTC, connector and framebuffer configuration.
84 *
85 * Called by the user via ioctl.
86 *
87 * Returns:
88 * Zero on success, negative errno on failure.
89 */
90int drm_mode_getresources(struct drm_device *dev, void *data,
91 struct drm_file *file_priv)
92{
93 struct drm_mode_card_res *card_res = data;
94 struct drm_framebuffer *fb;
95 struct drm_connector *connector;
96 struct drm_crtc *crtc;
97 struct drm_encoder *encoder;
98 int count, ret = 0;
99 uint32_t __user *fb_id;
100 uint32_t __user *crtc_id;
101 uint32_t __user *connector_id;
102 uint32_t __user *encoder_id;
103 struct drm_connector_list_iter conn_iter;
104
105 if (!drm_core_check_feature(dev, DRIVER_MODESET))
106 return -EOPNOTSUPP;
107
108 mutex_lock(&file_priv->fbs_lock);
109 count = 0;
110 fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
111 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
112 if (count < card_res->count_fbs &&
113 put_user(fb->base.id, fb_id + count)) {
114 mutex_unlock(&file_priv->fbs_lock);
115 return -EFAULT;
116 }
117 count++;
118 }
119 card_res->count_fbs = count;
120 mutex_unlock(&file_priv->fbs_lock);
121
122 card_res->max_height = dev->mode_config.max_height;
123 card_res->min_height = dev->mode_config.min_height;
124 card_res->max_width = dev->mode_config.max_width;
125 card_res->min_width = dev->mode_config.min_width;
126
127 count = 0;
128 crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
129 drm_for_each_crtc(crtc, dev) {
130 if (drm_lease_held(file_priv, crtc->base.id)) {
131 if (count < card_res->count_crtcs &&
132 put_user(crtc->base.id, crtc_id + count))
133 return -EFAULT;
134 count++;
135 }
136 }
137 card_res->count_crtcs = count;
138
139 count = 0;
140 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
141 drm_for_each_encoder(encoder, dev) {
142 if (count < card_res->count_encoders &&
143 put_user(encoder->base.id, encoder_id + count))
144 return -EFAULT;
145 count++;
146 }
147 card_res->count_encoders = count;
148
149 drm_connector_list_iter_begin(dev, &conn_iter);
150 count = 0;
151 connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
152 drm_for_each_connector_iter(connector, &conn_iter) {
153 /* only expose writeback connectors if userspace understands them */
154 if (!file_priv->writeback_connectors &&
155 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
156 continue;
157
158 if (drm_lease_held(file_priv, connector->base.id)) {
159 if (count < card_res->count_connectors &&
160 put_user(connector->base.id, connector_id + count)) {
161 drm_connector_list_iter_end(&conn_iter);
162 return -EFAULT;
163 }
164 count++;
165 }
166 }
167 card_res->count_connectors = count;
168 drm_connector_list_iter_end(&conn_iter);
169
170 return ret;
171}
172
173/**
174 * drm_mode_config_reset - call ->reset callbacks
175 * @dev: drm device
176 *
177 * This functions calls all the crtc's, encoder's and connector's ->reset
178 * callback. Drivers can use this in e.g. their driver load or resume code to
179 * reset hardware and software state.
180 */
181void drm_mode_config_reset(struct drm_device *dev)
182{
183 struct drm_crtc *crtc;
184 struct drm_plane *plane;
185 struct drm_encoder *encoder;
186 struct drm_connector *connector;
187 struct drm_connector_list_iter conn_iter;
188
189 drm_for_each_plane(plane, dev)
190 if (plane->funcs->reset)
191 plane->funcs->reset(plane);
192
193 drm_for_each_crtc(crtc, dev)
194 if (crtc->funcs->reset)
195 crtc->funcs->reset(crtc);
196
197 drm_for_each_encoder(encoder, dev)
198 if (encoder->funcs->reset)
199 encoder->funcs->reset(encoder);
200
201 drm_connector_list_iter_begin(dev, &conn_iter);
202 drm_for_each_connector_iter(connector, &conn_iter)
203 if (connector->funcs->reset)
204 connector->funcs->reset(connector);
205 drm_connector_list_iter_end(&conn_iter);
206}
207EXPORT_SYMBOL(drm_mode_config_reset);
208
209/*
210 * Global properties
211 */
212static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
213 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
214 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
215 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
216};
217
218static int drm_mode_create_standard_properties(struct drm_device *dev)
219{
220 struct drm_property *prop;
221 int ret;
222
223 ret = drm_connector_create_standard_properties(dev);
224 if (ret)
225 return ret;
226
227 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
228 "type", drm_plane_type_enum_list,
229 ARRAY_SIZE(drm_plane_type_enum_list));
230 if (!prop)
231 return -ENOMEM;
232 dev->mode_config.plane_type_property = prop;
233
234 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
235 "SRC_X", 0, UINT_MAX);
236 if (!prop)
237 return -ENOMEM;
238 dev->mode_config.prop_src_x = prop;
239
240 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
241 "SRC_Y", 0, UINT_MAX);
242 if (!prop)
243 return -ENOMEM;
244 dev->mode_config.prop_src_y = prop;
245
246 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
247 "SRC_W", 0, UINT_MAX);
248 if (!prop)
249 return -ENOMEM;
250 dev->mode_config.prop_src_w = prop;
251
252 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
253 "SRC_H", 0, UINT_MAX);
254 if (!prop)
255 return -ENOMEM;
256 dev->mode_config.prop_src_h = prop;
257
258 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
259 "CRTC_X", INT_MIN, INT_MAX);
260 if (!prop)
261 return -ENOMEM;
262 dev->mode_config.prop_crtc_x = prop;
263
264 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
265 "CRTC_Y", INT_MIN, INT_MAX);
266 if (!prop)
267 return -ENOMEM;
268 dev->mode_config.prop_crtc_y = prop;
269
270 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
271 "CRTC_W", 0, INT_MAX);
272 if (!prop)
273 return -ENOMEM;
274 dev->mode_config.prop_crtc_w = prop;
275
276 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
277 "CRTC_H", 0, INT_MAX);
278 if (!prop)
279 return -ENOMEM;
280 dev->mode_config.prop_crtc_h = prop;
281
282 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
283 "FB_ID", DRM_MODE_OBJECT_FB);
284 if (!prop)
285 return -ENOMEM;
286 dev->mode_config.prop_fb_id = prop;
287
288 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
289 "IN_FENCE_FD", -1, INT_MAX);
290 if (!prop)
291 return -ENOMEM;
292 dev->mode_config.prop_in_fence_fd = prop;
293
294 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
295 "OUT_FENCE_PTR", 0, U64_MAX);
296 if (!prop)
297 return -ENOMEM;
298 dev->mode_config.prop_out_fence_ptr = prop;
299
300 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
301 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
302 if (!prop)
303 return -ENOMEM;
304 dev->mode_config.prop_crtc_id = prop;
305
306 prop = drm_property_create(dev,
307 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
308 "FB_DAMAGE_CLIPS", 0);
309 if (!prop)
310 return -ENOMEM;
311 dev->mode_config.prop_fb_damage_clips = prop;
312
313 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
314 "ACTIVE");
315 if (!prop)
316 return -ENOMEM;
317 dev->mode_config.prop_active = prop;
318
319 prop = drm_property_create(dev,
320 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
321 "MODE_ID", 0);
322 if (!prop)
323 return -ENOMEM;
324 dev->mode_config.prop_mode_id = prop;
325
326 prop = drm_property_create_bool(dev, 0,
327 "VRR_ENABLED");
328 if (!prop)
329 return -ENOMEM;
330 dev->mode_config.prop_vrr_enabled = prop;
331
332 prop = drm_property_create(dev,
333 DRM_MODE_PROP_BLOB,
334 "DEGAMMA_LUT", 0);
335 if (!prop)
336 return -ENOMEM;
337 dev->mode_config.degamma_lut_property = prop;
338
339 prop = drm_property_create_range(dev,
340 DRM_MODE_PROP_IMMUTABLE,
341 "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
342 if (!prop)
343 return -ENOMEM;
344 dev->mode_config.degamma_lut_size_property = prop;
345
346 prop = drm_property_create(dev,
347 DRM_MODE_PROP_BLOB,
348 "CTM", 0);
349 if (!prop)
350 return -ENOMEM;
351 dev->mode_config.ctm_property = prop;
352
353 prop = drm_property_create(dev,
354 DRM_MODE_PROP_BLOB,
355 "GAMMA_LUT", 0);
356 if (!prop)
357 return -ENOMEM;
358 dev->mode_config.gamma_lut_property = prop;
359
360 prop = drm_property_create_range(dev,
361 DRM_MODE_PROP_IMMUTABLE,
362 "GAMMA_LUT_SIZE", 0, UINT_MAX);
363 if (!prop)
364 return -ENOMEM;
365 dev->mode_config.gamma_lut_size_property = prop;
366
367 prop = drm_property_create(dev,
368 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
369 "IN_FORMATS", 0);
370 if (!prop)
371 return -ENOMEM;
372 dev->mode_config.modifiers_property = prop;
373
374 return 0;
375}
376
377static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
378{
379 drm_mode_config_cleanup(dev);
380}
381
382/**
383 * drmm_mode_config_init - managed DRM mode_configuration structure
384 * initialization
385 * @dev: DRM device
386 *
387 * Initialize @dev's mode_config structure, used for tracking the graphics
388 * configuration of @dev.
389 *
390 * Since this initializes the modeset locks, no locking is possible. Which is no
391 * problem, since this should happen single threaded at init time. It is the
392 * driver's problem to ensure this guarantee.
393 *
394 * Cleanup is automatically handled through registering drm_mode_config_cleanup
395 * with drmm_add_action().
396 *
397 * Returns: 0 on success, negative error value on failure.
398 */
399int drmm_mode_config_init(struct drm_device *dev)
400{
401 mutex_init(&dev->mode_config.mutex);
402 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
403 mutex_init(&dev->mode_config.idr_mutex);
404 mutex_init(&dev->mode_config.fb_lock);
405 mutex_init(&dev->mode_config.blob_lock);
406 INIT_LIST_HEAD(&dev->mode_config.fb_list);
407 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
408 INIT_LIST_HEAD(&dev->mode_config.connector_list);
409 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
410 INIT_LIST_HEAD(&dev->mode_config.property_list);
411 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
412 INIT_LIST_HEAD(&dev->mode_config.plane_list);
413 INIT_LIST_HEAD(&dev->mode_config.privobj_list);
414 idr_init(&dev->mode_config.object_idr);
415 idr_init(&dev->mode_config.tile_idr);
416 ida_init(&dev->mode_config.connector_ida);
417 spin_lock_init(&dev->mode_config.connector_list_lock);
418
419 init_llist_head(&dev->mode_config.connector_free_list);
420 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
421
422 drm_mode_create_standard_properties(dev);
423
424 /* Just to be sure */
425 dev->mode_config.num_fb = 0;
426 dev->mode_config.num_connector = 0;
427 dev->mode_config.num_crtc = 0;
428 dev->mode_config.num_encoder = 0;
429 dev->mode_config.num_total_plane = 0;
430
431 if (IS_ENABLED(CONFIG_LOCKDEP)) {
432 struct drm_modeset_acquire_ctx modeset_ctx;
433 struct ww_acquire_ctx resv_ctx;
434 struct dma_resv resv;
435 int ret;
436
437 dma_resv_init(&resv);
438
439 drm_modeset_acquire_init(&modeset_ctx, 0);
440 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
441 &modeset_ctx);
442 if (ret == -EDEADLK)
443 ret = drm_modeset_backoff(&modeset_ctx);
444
445 ww_acquire_init(&resv_ctx, &reservation_ww_class);
446 ret = dma_resv_lock(&resv, &resv_ctx);
447 if (ret == -EDEADLK)
448 dma_resv_lock_slow(&resv, &resv_ctx);
449
450 dma_resv_unlock(&resv);
451 ww_acquire_fini(&resv_ctx);
452
453 drm_modeset_drop_locks(&modeset_ctx);
454 drm_modeset_acquire_fini(&modeset_ctx);
455 dma_resv_fini(&resv);
456 }
457
458 return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
459 NULL);
460}
461EXPORT_SYMBOL(drmm_mode_config_init);
462
463/**
464 * drm_mode_config_cleanup - free up DRM mode_config info
465 * @dev: DRM device
466 *
467 * Free up all the connectors and CRTCs associated with this DRM device, then
468 * free up the framebuffers and associated buffer objects.
469 *
470 * Note that since this /should/ happen single-threaded at driver/device
471 * teardown time, no locking is required. It's the driver's job to ensure that
472 * this guarantee actually holds true.
473 *
474 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
475 * drivers to explicitly call this function.
476 */
477void drm_mode_config_cleanup(struct drm_device *dev)
478{
479 struct drm_connector *connector;
480 struct drm_connector_list_iter conn_iter;
481 struct drm_crtc *crtc, *ct;
482 struct drm_encoder *encoder, *enct;
483 struct drm_framebuffer *fb, *fbt;
484 struct drm_property *property, *pt;
485 struct drm_property_blob *blob, *bt;
486 struct drm_plane *plane, *plt;
487
488 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
489 head) {
490 encoder->funcs->destroy(encoder);
491 }
492
493 drm_connector_list_iter_begin(dev, &conn_iter);
494 drm_for_each_connector_iter(connector, &conn_iter) {
495 /* drm_connector_list_iter holds an full reference to the
496 * current connector itself, which means it is inherently safe
497 * against unreferencing the current connector - but not against
498 * deleting it right away. */
499 drm_connector_put(connector);
500 }
501 drm_connector_list_iter_end(&conn_iter);
502 /* connector_iter drops references in a work item. */
503 flush_work(&dev->mode_config.connector_free_work);
504 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
505 drm_connector_list_iter_begin(dev, &conn_iter);
506 drm_for_each_connector_iter(connector, &conn_iter)
507 DRM_ERROR("connector %s leaked!\n", connector->name);
508 drm_connector_list_iter_end(&conn_iter);
509 }
510
511 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
512 head) {
513 drm_property_destroy(dev, property);
514 }
515
516 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
517 head) {
518 plane->funcs->destroy(plane);
519 }
520
521 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
522 crtc->funcs->destroy(crtc);
523 }
524
525 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
526 head_global) {
527 drm_property_blob_put(blob);
528 }
529
530 /*
531 * Single-threaded teardown context, so it's not required to grab the
532 * fb_lock to protect against concurrent fb_list access. Contrary, it
533 * would actually deadlock with the drm_framebuffer_cleanup function.
534 *
535 * Also, if there are any framebuffers left, that's a driver leak now,
536 * so politely WARN about this.
537 */
538 WARN_ON(!list_empty(&dev->mode_config.fb_list));
539 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
540 struct drm_printer p = drm_debug_printer("[leaked fb]");
541
542 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
543 drm_framebuffer_print_info(&p, 1, fb);
544 drm_framebuffer_free(&fb->base.refcount);
545 }
546
547 ida_destroy(&dev->mode_config.connector_ida);
548 idr_destroy(&dev->mode_config.tile_idr);
549 idr_destroy(&dev->mode_config.object_idr);
550 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
551}
552EXPORT_SYMBOL(drm_mode_config_cleanup);
553
554static u32 full_encoder_mask(struct drm_device *dev)
555{
556 struct drm_encoder *encoder;
557 u32 encoder_mask = 0;
558
559 drm_for_each_encoder(encoder, dev)
560 encoder_mask |= drm_encoder_mask(encoder);
561
562 return encoder_mask;
563}
564
565/*
566 * For some reason we want the encoder itself included in
567 * possible_clones. Make life easy for drivers by allowing them
568 * to leave possible_clones unset if no cloning is possible.
569 */
570static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
571{
572 if (encoder->possible_clones == 0)
573 encoder->possible_clones = drm_encoder_mask(encoder);
574}
575
576static void validate_encoder_possible_clones(struct drm_encoder *encoder)
577{
578 struct drm_device *dev = encoder->dev;
579 u32 encoder_mask = full_encoder_mask(dev);
580 struct drm_encoder *other;
581
582 drm_for_each_encoder(other, dev) {
583 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
584 !!(other->possible_clones & drm_encoder_mask(encoder)),
585 "possible_clones mismatch: "
586 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
587 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
588 encoder->base.id, encoder->name,
589 drm_encoder_mask(encoder), encoder->possible_clones,
590 other->base.id, other->name,
591 drm_encoder_mask(other), other->possible_clones);
592 }
593
594 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
595 (encoder->possible_clones & ~encoder_mask) != 0,
596 "Bogus possible_clones: "
597 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
598 encoder->base.id, encoder->name,
599 encoder->possible_clones, encoder_mask);
600}
601
602static u32 full_crtc_mask(struct drm_device *dev)
603{
604 struct drm_crtc *crtc;
605 u32 crtc_mask = 0;
606
607 drm_for_each_crtc(crtc, dev)
608 crtc_mask |= drm_crtc_mask(crtc);
609
610 return crtc_mask;
611}
612
613static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
614{
615 u32 crtc_mask = full_crtc_mask(encoder->dev);
616
617 WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
618 (encoder->possible_crtcs & ~crtc_mask) != 0,
619 "Bogus possible_crtcs: "
620 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
621 encoder->base.id, encoder->name,
622 encoder->possible_crtcs, crtc_mask);
623}
624
625void drm_mode_config_validate(struct drm_device *dev)
626{
627 struct drm_encoder *encoder;
628
629 if (!drm_core_check_feature(dev, DRIVER_MODESET))
630 return;
631
632 drm_for_each_encoder(encoder, dev)
633 fixup_encoder_possible_clones(encoder);
634
635 drm_for_each_encoder(encoder, dev) {
636 validate_encoder_possible_clones(encoder);
637 validate_encoder_possible_crtcs(encoder);
638 }
639}