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/export.h>
24#include <linux/uaccess.h>
25
26#include <drm/drm_drv.h>
27#include <drm/drm_encoder.h>
28#include <drm/drm_file.h>
29#include <drm/drm_framebuffer.h>
30#include <drm/drm_managed.h>
31#include <drm/drm_mode_config.h>
32#include <drm/drm_print.h>
33#include <drm/drm_colorop.h>
34#include <linux/dma-resv.h>
35
36#include "drm_crtc_internal.h"
37#include "drm_internal.h"
38
39int drm_modeset_register_all(struct drm_device *dev)
40{
41 int ret;
42
43 ret = drm_plane_register_all(dev);
44 if (ret)
45 goto err_plane;
46
47 ret = drm_crtc_register_all(dev);
48 if (ret)
49 goto err_crtc;
50
51 ret = drm_encoder_register_all(dev);
52 if (ret)
53 goto err_encoder;
54
55 ret = drm_connector_register_all(dev);
56 if (ret)
57 goto err_connector;
58
59 return 0;
60
61err_connector:
62 drm_encoder_unregister_all(dev);
63err_encoder:
64 drm_crtc_unregister_all(dev);
65err_crtc:
66 drm_plane_unregister_all(dev);
67err_plane:
68 return ret;
69}
70
71void 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 */
93int 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, feature: 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(lock: &file_priv->fbs_lock);
118 return -EFAULT;
119 }
120 count++;
121 }
122 card_res->count_fbs = count;
123 mutex_unlock(lock: &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, id: 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, iter: &conn_iter);
153 count = 0;
154 connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
155 /*
156 * FIXME: the connectors on the list may not be fully initialized yet,
157 * if the ioctl is called before the connectors are registered. (See
158 * drm_dev_register()->drm_modeset_register_all() for static and
159 * drm_connector_dynamic_register() for dynamic connectors.)
160 * The driver should only get registered after static connectors are
161 * fully initialized and dynamic connectors should be added to the
162 * connector list only after fully initializing them.
163 */
164 drm_for_each_connector_iter(connector, &conn_iter) {
165 /* only expose writeback connectors if userspace understands them */
166 if (!file_priv->writeback_connectors &&
167 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
168 continue;
169
170 if (drm_lease_held(file_priv, id: connector->base.id)) {
171 if (count < card_res->count_connectors &&
172 put_user(connector->base.id, connector_id + count)) {
173 drm_connector_list_iter_end(iter: &conn_iter);
174 return -EFAULT;
175 }
176 count++;
177 }
178 }
179 card_res->count_connectors = count;
180 drm_connector_list_iter_end(iter: &conn_iter);
181
182 return ret;
183}
184
185/**
186 * drm_mode_config_reset - call ->reset callbacks
187 * @dev: drm device
188 *
189 * This functions calls all the crtc's, encoder's and connector's ->reset
190 * callback. Drivers can use this in e.g. their driver load or resume code to
191 * reset hardware and software state.
192 */
193void drm_mode_config_reset(struct drm_device *dev)
194{
195 struct drm_crtc *crtc;
196 struct drm_colorop *colorop;
197 struct drm_plane *plane;
198 struct drm_encoder *encoder;
199 struct drm_connector *connector;
200 struct drm_connector_list_iter conn_iter;
201
202 drm_for_each_colorop(colorop, dev)
203 drm_colorop_reset(colorop);
204
205 drm_for_each_plane(plane, dev)
206 if (plane->funcs->reset)
207 plane->funcs->reset(plane);
208
209 drm_for_each_crtc(crtc, dev)
210 if (crtc->funcs->reset)
211 crtc->funcs->reset(crtc);
212
213 drm_for_each_encoder(encoder, dev)
214 if (encoder->funcs && encoder->funcs->reset)
215 encoder->funcs->reset(encoder);
216
217 drm_connector_list_iter_begin(dev, iter: &conn_iter);
218 drm_for_each_connector_iter(connector, &conn_iter)
219 if (connector->funcs->reset)
220 connector->funcs->reset(connector);
221 drm_connector_list_iter_end(iter: &conn_iter);
222}
223EXPORT_SYMBOL(drm_mode_config_reset);
224
225/*
226 * Global properties
227 */
228static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
229 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
230 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
231 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
232};
233
234static int drm_mode_create_standard_properties(struct drm_device *dev)
235{
236 struct drm_property *prop;
237 int ret;
238
239 ret = drm_connector_create_standard_properties(dev);
240 if (ret)
241 return ret;
242
243 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
244 name: "type", props: drm_plane_type_enum_list,
245 ARRAY_SIZE(drm_plane_type_enum_list));
246 if (!prop)
247 return -ENOMEM;
248 dev->mode_config.plane_type_property = prop;
249
250 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
251 name: "SRC_X", min: 0, UINT_MAX);
252 if (!prop)
253 return -ENOMEM;
254 dev->mode_config.prop_src_x = prop;
255
256 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
257 name: "SRC_Y", min: 0, UINT_MAX);
258 if (!prop)
259 return -ENOMEM;
260 dev->mode_config.prop_src_y = prop;
261
262 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
263 name: "SRC_W", min: 0, UINT_MAX);
264 if (!prop)
265 return -ENOMEM;
266 dev->mode_config.prop_src_w = prop;
267
268 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
269 name: "SRC_H", min: 0, UINT_MAX);
270 if (!prop)
271 return -ENOMEM;
272 dev->mode_config.prop_src_h = prop;
273
274 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
275 name: "CRTC_X", INT_MIN, INT_MAX);
276 if (!prop)
277 return -ENOMEM;
278 dev->mode_config.prop_crtc_x = prop;
279
280 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
281 name: "CRTC_Y", INT_MIN, INT_MAX);
282 if (!prop)
283 return -ENOMEM;
284 dev->mode_config.prop_crtc_y = prop;
285
286 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
287 name: "CRTC_W", min: 0, INT_MAX);
288 if (!prop)
289 return -ENOMEM;
290 dev->mode_config.prop_crtc_w = prop;
291
292 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
293 name: "CRTC_H", min: 0, INT_MAX);
294 if (!prop)
295 return -ENOMEM;
296 dev->mode_config.prop_crtc_h = prop;
297
298 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
299 name: "FB_ID", DRM_MODE_OBJECT_FB);
300 if (!prop)
301 return -ENOMEM;
302 dev->mode_config.prop_fb_id = prop;
303
304 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
305 name: "IN_FENCE_FD", min: -1, INT_MAX);
306 if (!prop)
307 return -ENOMEM;
308 dev->mode_config.prop_in_fence_fd = prop;
309
310 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
311 name: "OUT_FENCE_PTR", min: 0, U64_MAX);
312 if (!prop)
313 return -ENOMEM;
314 dev->mode_config.prop_out_fence_ptr = prop;
315
316 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
317 name: "CRTC_ID", DRM_MODE_OBJECT_CRTC);
318 if (!prop)
319 return -ENOMEM;
320 dev->mode_config.prop_crtc_id = prop;
321
322 prop = drm_property_create(dev,
323 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
324 name: "FB_DAMAGE_CLIPS", num_values: 0);
325 if (!prop)
326 return -ENOMEM;
327 dev->mode_config.prop_fb_damage_clips = prop;
328
329 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
330 name: "ACTIVE");
331 if (!prop)
332 return -ENOMEM;
333 dev->mode_config.prop_active = prop;
334
335 prop = drm_property_create(dev,
336 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
337 name: "MODE_ID", num_values: 0);
338 if (!prop)
339 return -ENOMEM;
340 dev->mode_config.prop_mode_id = prop;
341
342 prop = drm_property_create_bool(dev, flags: 0,
343 name: "VRR_ENABLED");
344 if (!prop)
345 return -ENOMEM;
346 dev->mode_config.prop_vrr_enabled = prop;
347
348 prop = drm_property_create(dev,
349 DRM_MODE_PROP_BLOB,
350 name: "DEGAMMA_LUT", num_values: 0);
351 if (!prop)
352 return -ENOMEM;
353 dev->mode_config.degamma_lut_property = prop;
354
355 prop = drm_property_create_range(dev,
356 DRM_MODE_PROP_IMMUTABLE,
357 name: "DEGAMMA_LUT_SIZE", min: 0, UINT_MAX);
358 if (!prop)
359 return -ENOMEM;
360 dev->mode_config.degamma_lut_size_property = prop;
361
362 prop = drm_property_create(dev,
363 DRM_MODE_PROP_BLOB,
364 name: "CTM", num_values: 0);
365 if (!prop)
366 return -ENOMEM;
367 dev->mode_config.ctm_property = prop;
368
369 prop = drm_property_create(dev,
370 DRM_MODE_PROP_BLOB,
371 name: "GAMMA_LUT", num_values: 0);
372 if (!prop)
373 return -ENOMEM;
374 dev->mode_config.gamma_lut_property = prop;
375
376 prop = drm_property_create_range(dev,
377 DRM_MODE_PROP_IMMUTABLE,
378 name: "GAMMA_LUT_SIZE", min: 0, UINT_MAX);
379 if (!prop)
380 return -ENOMEM;
381 dev->mode_config.gamma_lut_size_property = prop;
382
383 prop = drm_property_create(dev,
384 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
385 name: "IN_FORMATS", num_values: 0);
386 if (!prop)
387 return -ENOMEM;
388 dev->mode_config.modifiers_property = prop;
389
390 prop = drm_property_create(dev,
391 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
392 name: "IN_FORMATS_ASYNC", num_values: 0);
393 if (!prop)
394 return -ENOMEM;
395 dev->mode_config.async_modifiers_property = prop;
396
397 prop = drm_property_create(dev,
398 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
399 name: "SIZE_HINTS", num_values: 0);
400 if (!prop)
401 return -ENOMEM;
402 dev->mode_config.size_hints_property = prop;
403
404 return 0;
405}
406
407static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
408{
409 drm_mode_config_cleanup(dev);
410}
411
412/**
413 * drmm_mode_config_init - managed DRM mode_configuration structure
414 * initialization
415 * @dev: DRM device
416 *
417 * Initialize @dev's mode_config structure, used for tracking the graphics
418 * configuration of @dev.
419 *
420 * Since this initializes the modeset locks, no locking is possible. Which is no
421 * problem, since this should happen single threaded at init time. It is the
422 * driver's problem to ensure this guarantee.
423 *
424 * Cleanup is automatically handled through registering drm_mode_config_cleanup
425 * with drmm_add_action().
426 *
427 * Returns: 0 on success, negative error value on failure.
428 */
429int drmm_mode_config_init(struct drm_device *dev)
430{
431 int ret;
432
433 mutex_init(&dev->mode_config.mutex);
434 drm_modeset_lock_init(lock: &dev->mode_config.connection_mutex);
435 mutex_init(&dev->mode_config.idr_mutex);
436 mutex_init(&dev->mode_config.fb_lock);
437 mutex_init(&dev->mode_config.blob_lock);
438 INIT_LIST_HEAD(list: &dev->mode_config.fb_list);
439 INIT_LIST_HEAD(list: &dev->mode_config.crtc_list);
440 INIT_LIST_HEAD(list: &dev->mode_config.connector_list);
441 INIT_LIST_HEAD(list: &dev->mode_config.encoder_list);
442 INIT_LIST_HEAD(list: &dev->mode_config.property_list);
443 INIT_LIST_HEAD(list: &dev->mode_config.property_blob_list);
444 INIT_LIST_HEAD(list: &dev->mode_config.plane_list);
445 INIT_LIST_HEAD(list: &dev->mode_config.colorop_list);
446 INIT_LIST_HEAD(list: &dev->mode_config.privobj_list);
447 idr_init_base(idr: &dev->mode_config.object_idr, base: 1);
448 idr_init_base(idr: &dev->mode_config.tile_idr, base: 1);
449 ida_init(ida: &dev->mode_config.connector_ida);
450 spin_lock_init(&dev->mode_config.connector_list_lock);
451
452 init_llist_head(list: &dev->mode_config.connector_free_list);
453 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
454
455 ret = drm_mode_create_standard_properties(dev);
456 if (ret) {
457 drm_mode_config_cleanup(dev);
458 return ret;
459 }
460
461 /* Just to be sure */
462 dev->mode_config.num_fb = 0;
463 dev->mode_config.num_connector = 0;
464 dev->mode_config.num_crtc = 0;
465 dev->mode_config.num_encoder = 0;
466 dev->mode_config.num_total_plane = 0;
467 dev->mode_config.num_colorop = 0;
468
469 if (IS_ENABLED(CONFIG_LOCKDEP)) {
470 struct drm_modeset_acquire_ctx modeset_ctx;
471 struct ww_acquire_ctx resv_ctx;
472 struct dma_resv resv;
473 int ret;
474
475 dma_resv_init(obj: &resv);
476
477 drm_modeset_acquire_init(ctx: &modeset_ctx, flags: 0);
478 ret = drm_modeset_lock(lock: &dev->mode_config.connection_mutex,
479 ctx: &modeset_ctx);
480 if (ret == -EDEADLK)
481 ret = drm_modeset_backoff(ctx: &modeset_ctx);
482
483 might_fault();
484
485 ww_acquire_init(ctx: &resv_ctx, ww_class: &reservation_ww_class);
486 ret = dma_resv_lock(obj: &resv, ctx: &resv_ctx);
487 if (ret == -EDEADLK)
488 dma_resv_lock_slow(obj: &resv, ctx: &resv_ctx);
489
490 dma_resv_unlock(obj: &resv);
491 ww_acquire_fini(ctx: &resv_ctx);
492
493 drm_modeset_drop_locks(ctx: &modeset_ctx);
494 drm_modeset_acquire_fini(ctx: &modeset_ctx);
495 dma_resv_fini(obj: &resv);
496 }
497
498 return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
499 NULL);
500}
501EXPORT_SYMBOL(drmm_mode_config_init);
502
503/**
504 * drm_mode_config_cleanup - free up DRM mode_config info
505 * @dev: DRM device
506 *
507 * Free up all the connectors and CRTCs associated with this DRM device, then
508 * free up the framebuffers and associated buffer objects.
509 *
510 * Note that since this /should/ happen single-threaded at driver/device
511 * teardown time, no locking is required. It's the driver's job to ensure that
512 * this guarantee actually holds true.
513 *
514 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
515 * drivers to explicitly call this function.
516 */
517void drm_mode_config_cleanup(struct drm_device *dev)
518{
519 struct drm_connector *connector;
520 struct drm_connector_list_iter conn_iter;
521 struct drm_crtc *crtc, *ct;
522 struct drm_encoder *encoder, *enct;
523 struct drm_framebuffer *fb, *fbt;
524 struct drm_property *property, *pt;
525 struct drm_property_blob *blob, *bt;
526 struct drm_plane *plane, *plt;
527
528 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
529 head) {
530 encoder->funcs->destroy(encoder);
531 }
532
533 drm_connector_list_iter_begin(dev, iter: &conn_iter);
534 drm_for_each_connector_iter(connector, &conn_iter) {
535 /* drm_connector_list_iter holds an full reference to the
536 * current connector itself, which means it is inherently safe
537 * against unreferencing the current connector - but not against
538 * deleting it right away. */
539 drm_connector_put(connector);
540 }
541 drm_connector_list_iter_end(iter: &conn_iter);
542 /* connector_iter drops references in a work item. */
543 flush_work(work: &dev->mode_config.connector_free_work);
544 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
545 drm_connector_list_iter_begin(dev, iter: &conn_iter);
546 drm_for_each_connector_iter(connector, &conn_iter)
547 DRM_ERROR("connector %s leaked!\n", connector->name);
548 drm_connector_list_iter_end(iter: &conn_iter);
549 }
550
551 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
552 head) {
553 drm_property_destroy(dev, property);
554 }
555
556 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
557 head) {
558 plane->funcs->destroy(plane);
559 }
560
561 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
562 crtc->funcs->destroy(crtc);
563 }
564
565 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
566 head_global) {
567 drm_property_blob_put(blob);
568 }
569
570 /*
571 * Single-threaded teardown context, so it's not required to grab the
572 * fb_lock to protect against concurrent fb_list access. Contrary, it
573 * would actually deadlock with the drm_framebuffer_cleanup function.
574 *
575 * Also, if there are any framebuffers left, that's a driver leak now,
576 * so politely WARN about this.
577 */
578 WARN_ON(!list_empty(&dev->mode_config.fb_list));
579 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
580 struct drm_printer p = drm_dbg_printer(drm: dev, category: DRM_UT_KMS, prefix: "[leaked fb]");
581
582 drm_printf(p: &p, f: "framebuffer[%u]:\n", fb->base.id);
583 drm_framebuffer_print_info(p: &p, indent: 1, fb);
584 drm_framebuffer_free(kref: &fb->base.refcount);
585 }
586
587 ida_destroy(ida: &dev->mode_config.connector_ida);
588 idr_destroy(&dev->mode_config.tile_idr);
589 idr_destroy(&dev->mode_config.object_idr);
590 drm_modeset_lock_fini(lock: &dev->mode_config.connection_mutex);
591}
592EXPORT_SYMBOL(drm_mode_config_cleanup);
593
594static u32 full_encoder_mask(struct drm_device *dev)
595{
596 struct drm_encoder *encoder;
597 u32 encoder_mask = 0;
598
599 drm_for_each_encoder(encoder, dev)
600 encoder_mask |= drm_encoder_mask(encoder);
601
602 return encoder_mask;
603}
604
605/*
606 * For some reason we want the encoder itself included in
607 * possible_clones. Make life easy for drivers by allowing them
608 * to leave possible_clones unset if no cloning is possible.
609 */
610static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
611{
612 if (encoder->possible_clones == 0)
613 encoder->possible_clones = drm_encoder_mask(encoder);
614}
615
616static void validate_encoder_possible_clones(struct drm_encoder *encoder)
617{
618 struct drm_device *dev = encoder->dev;
619 u32 encoder_mask = full_encoder_mask(dev);
620 struct drm_encoder *other;
621
622 drm_for_each_encoder(other, dev) {
623 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
624 !!(other->possible_clones & drm_encoder_mask(encoder)),
625 "possible_clones mismatch: "
626 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
627 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
628 encoder->base.id, encoder->name,
629 drm_encoder_mask(encoder), encoder->possible_clones,
630 other->base.id, other->name,
631 drm_encoder_mask(other), other->possible_clones);
632 }
633
634 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
635 (encoder->possible_clones & ~encoder_mask) != 0,
636 "Bogus possible_clones: "
637 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
638 encoder->base.id, encoder->name,
639 encoder->possible_clones, encoder_mask);
640}
641
642static u32 full_crtc_mask(struct drm_device *dev)
643{
644 struct drm_crtc *crtc;
645 u32 crtc_mask = 0;
646
647 drm_for_each_crtc(crtc, dev)
648 crtc_mask |= drm_crtc_mask(crtc);
649
650 return crtc_mask;
651}
652
653static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
654{
655 u32 crtc_mask = full_crtc_mask(dev: encoder->dev);
656
657 WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
658 (encoder->possible_crtcs & ~crtc_mask) != 0,
659 "Bogus possible_crtcs: "
660 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
661 encoder->base.id, encoder->name,
662 encoder->possible_crtcs, crtc_mask);
663}
664
665void drm_mode_config_validate(struct drm_device *dev)
666{
667 struct drm_encoder *encoder;
668 struct drm_crtc *crtc;
669 struct drm_plane *plane;
670 u32 primary_with_crtc = 0, cursor_with_crtc = 0;
671 unsigned int num_primary = 0;
672
673 if (!drm_core_check_feature(dev, feature: DRIVER_MODESET))
674 return;
675
676 drm_for_each_encoder(encoder, dev)
677 fixup_encoder_possible_clones(encoder);
678
679 drm_for_each_encoder(encoder, dev) {
680 validate_encoder_possible_clones(encoder);
681 validate_encoder_possible_crtcs(encoder);
682 }
683
684 drm_for_each_crtc(crtc, dev) {
685 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
686 crtc->base.id, crtc->name);
687
688 WARN(crtc->cursor && crtc->funcs->cursor_set,
689 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
690 crtc->base.id, crtc->name);
691 WARN(crtc->cursor && crtc->funcs->cursor_set2,
692 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
693 crtc->base.id, crtc->name);
694 WARN(crtc->cursor && crtc->funcs->cursor_move,
695 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
696 crtc->base.id, crtc->name);
697
698 if (crtc->primary) {
699 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
700 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
701 crtc->primary->base.id, crtc->primary->name,
702 crtc->base.id, crtc->name);
703 WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
704 "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
705 crtc->primary->base.id, crtc->primary->name);
706 primary_with_crtc |= drm_plane_mask(plane: crtc->primary);
707 }
708 if (crtc->cursor) {
709 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
710 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
711 crtc->cursor->base.id, crtc->cursor->name,
712 crtc->base.id, crtc->name);
713 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
714 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
715 crtc->cursor->base.id, crtc->cursor->name);
716 cursor_with_crtc |= drm_plane_mask(plane: crtc->cursor);
717 }
718 }
719
720 drm_for_each_plane(plane, dev) {
721 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
722 num_primary++;
723 }
724
725 WARN(num_primary != dev->mode_config.num_crtc,
726 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
727 num_primary, dev->mode_config.num_crtc);
728}
729

source code of linux/drivers/gpu/drm/drm_mode_config.c