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 <linux/dma-resv.h>
34
35#include "drm_crtc_internal.h"
36#include "drm_internal.h"
37
38int drm_modeset_register_all(struct drm_device *dev)
39{
40 int ret;
41
42 ret = drm_plane_register_all(dev);
43 if (ret)
44 goto err_plane;
45
46 ret = drm_crtc_register_all(dev);
47 if (ret)
48 goto err_crtc;
49
50 ret = drm_encoder_register_all(dev);
51 if (ret)
52 goto err_encoder;
53
54 ret = drm_connector_register_all(dev);
55 if (ret)
56 goto err_connector;
57
58 return 0;
59
60err_connector:
61 drm_encoder_unregister_all(dev);
62err_encoder:
63 drm_crtc_unregister_all(dev);
64err_crtc:
65 drm_plane_unregister_all(dev);
66err_plane:
67 return ret;
68}
69
70void drm_modeset_unregister_all(struct drm_device *dev)
71{
72 drm_connector_unregister_all(dev);
73 drm_encoder_unregister_all(dev);
74 drm_crtc_unregister_all(dev);
75 drm_plane_unregister_all(dev);
76}
77
78/**
79 * drm_mode_getresources - get graphics configuration
80 * @dev: drm device for the ioctl
81 * @data: data pointer for the ioctl
82 * @file_priv: drm file for the ioctl call
83 *
84 * Construct a set of configuration description structures and return
85 * them to the user, including CRTC, connector and framebuffer configuration.
86 *
87 * Called by the user via ioctl.
88 *
89 * Returns:
90 * Zero on success, negative errno on failure.
91 */
92int drm_mode_getresources(struct drm_device *dev, void *data,
93 struct drm_file *file_priv)
94{
95 struct drm_mode_card_res *card_res = data;
96 struct drm_framebuffer *fb;
97 struct drm_connector *connector;
98 struct drm_crtc *crtc;
99 struct drm_encoder *encoder;
100 int count, ret = 0;
101 uint32_t __user *fb_id;
102 uint32_t __user *crtc_id;
103 uint32_t __user *connector_id;
104 uint32_t __user *encoder_id;
105 struct drm_connector_list_iter conn_iter;
106
107 if (!drm_core_check_feature(dev, feature: DRIVER_MODESET))
108 return -EOPNOTSUPP;
109
110 mutex_lock(lock: &file_priv->fbs_lock);
111 count = 0;
112 fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
113 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
114 if (count < card_res->count_fbs &&
115 put_user(fb->base.id, fb_id + count)) {
116 mutex_unlock(lock: &file_priv->fbs_lock);
117 return -EFAULT;
118 }
119 count++;
120 }
121 card_res->count_fbs = count;
122 mutex_unlock(lock: &file_priv->fbs_lock);
123
124 card_res->max_height = dev->mode_config.max_height;
125 card_res->min_height = dev->mode_config.min_height;
126 card_res->max_width = dev->mode_config.max_width;
127 card_res->min_width = dev->mode_config.min_width;
128
129 count = 0;
130 crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
131 drm_for_each_crtc(crtc, dev) {
132 if (drm_lease_held(file_priv, id: crtc->base.id)) {
133 if (count < card_res->count_crtcs &&
134 put_user(crtc->base.id, crtc_id + count))
135 return -EFAULT;
136 count++;
137 }
138 }
139 card_res->count_crtcs = count;
140
141 count = 0;
142 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
143 drm_for_each_encoder(encoder, dev) {
144 if (count < card_res->count_encoders &&
145 put_user(encoder->base.id, encoder_id + count))
146 return -EFAULT;
147 count++;
148 }
149 card_res->count_encoders = count;
150
151 drm_connector_list_iter_begin(dev, iter: &conn_iter);
152 count = 0;
153 connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
154 /*
155 * FIXME: the connectors on the list may not be fully initialized yet,
156 * if the ioctl is called before the connectors are registered. (See
157 * drm_dev_register()->drm_modeset_register_all() for static and
158 * drm_connector_dynamic_register() for dynamic connectors.)
159 * The driver should only get registered after static connectors are
160 * fully initialized and dynamic connectors should be added to the
161 * connector list only after fully initializing them.
162 */
163 drm_for_each_connector_iter(connector, &conn_iter) {
164 /* only expose writeback connectors if userspace understands them */
165 if (!file_priv->writeback_connectors &&
166 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
167 continue;
168
169 if (drm_lease_held(file_priv, id: connector->base.id)) {
170 if (count < card_res->count_connectors &&
171 put_user(connector->base.id, connector_id + count)) {
172 drm_connector_list_iter_end(iter: &conn_iter);
173 return -EFAULT;
174 }
175 count++;
176 }
177 }
178 card_res->count_connectors = count;
179 drm_connector_list_iter_end(iter: &conn_iter);
180
181 return ret;
182}
183
184/**
185 * drm_mode_config_reset - call ->reset callbacks
186 * @dev: drm device
187 *
188 * This functions calls all the crtc's, encoder's and connector's ->reset
189 * callback. Drivers can use this in e.g. their driver load or resume code to
190 * reset hardware and software state.
191 */
192void drm_mode_config_reset(struct drm_device *dev)
193{
194 struct drm_crtc *crtc;
195 struct drm_plane *plane;
196 struct drm_encoder *encoder;
197 struct drm_connector *connector;
198 struct drm_connector_list_iter conn_iter;
199
200 drm_for_each_plane(plane, dev)
201 if (plane->funcs->reset)
202 plane->funcs->reset(plane);
203
204 drm_for_each_crtc(crtc, dev)
205 if (crtc->funcs->reset)
206 crtc->funcs->reset(crtc);
207
208 drm_for_each_encoder(encoder, dev)
209 if (encoder->funcs && encoder->funcs->reset)
210 encoder->funcs->reset(encoder);
211
212 drm_connector_list_iter_begin(dev, iter: &conn_iter);
213 drm_for_each_connector_iter(connector, &conn_iter)
214 if (connector->funcs->reset)
215 connector->funcs->reset(connector);
216 drm_connector_list_iter_end(iter: &conn_iter);
217}
218EXPORT_SYMBOL(drm_mode_config_reset);
219
220/*
221 * Global properties
222 */
223static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
224 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
225 { .type: DRM_PLANE_TYPE_PRIMARY, .name: "Primary" },
226 { .type: DRM_PLANE_TYPE_CURSOR, .name: "Cursor" },
227};
228
229static int drm_mode_create_standard_properties(struct drm_device *dev)
230{
231 struct drm_property *prop;
232 int ret;
233
234 ret = drm_connector_create_standard_properties(dev);
235 if (ret)
236 return ret;
237
238 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
239 name: "type", props: drm_plane_type_enum_list,
240 ARRAY_SIZE(drm_plane_type_enum_list));
241 if (!prop)
242 return -ENOMEM;
243 dev->mode_config.plane_type_property = prop;
244
245 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
246 name: "SRC_X", min: 0, UINT_MAX);
247 if (!prop)
248 return -ENOMEM;
249 dev->mode_config.prop_src_x = prop;
250
251 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
252 name: "SRC_Y", min: 0, UINT_MAX);
253 if (!prop)
254 return -ENOMEM;
255 dev->mode_config.prop_src_y = prop;
256
257 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
258 name: "SRC_W", min: 0, UINT_MAX);
259 if (!prop)
260 return -ENOMEM;
261 dev->mode_config.prop_src_w = prop;
262
263 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
264 name: "SRC_H", min: 0, UINT_MAX);
265 if (!prop)
266 return -ENOMEM;
267 dev->mode_config.prop_src_h = prop;
268
269 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
270 name: "CRTC_X", INT_MIN, INT_MAX);
271 if (!prop)
272 return -ENOMEM;
273 dev->mode_config.prop_crtc_x = prop;
274
275 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
276 name: "CRTC_Y", INT_MIN, INT_MAX);
277 if (!prop)
278 return -ENOMEM;
279 dev->mode_config.prop_crtc_y = prop;
280
281 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
282 name: "CRTC_W", min: 0, INT_MAX);
283 if (!prop)
284 return -ENOMEM;
285 dev->mode_config.prop_crtc_w = prop;
286
287 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
288 name: "CRTC_H", min: 0, INT_MAX);
289 if (!prop)
290 return -ENOMEM;
291 dev->mode_config.prop_crtc_h = prop;
292
293 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
294 name: "FB_ID", DRM_MODE_OBJECT_FB);
295 if (!prop)
296 return -ENOMEM;
297 dev->mode_config.prop_fb_id = prop;
298
299 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
300 name: "IN_FENCE_FD", min: -1, INT_MAX);
301 if (!prop)
302 return -ENOMEM;
303 dev->mode_config.prop_in_fence_fd = prop;
304
305 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
306 name: "OUT_FENCE_PTR", min: 0, U64_MAX);
307 if (!prop)
308 return -ENOMEM;
309 dev->mode_config.prop_out_fence_ptr = prop;
310
311 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
312 name: "CRTC_ID", DRM_MODE_OBJECT_CRTC);
313 if (!prop)
314 return -ENOMEM;
315 dev->mode_config.prop_crtc_id = prop;
316
317 prop = drm_property_create(dev,
318 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
319 name: "FB_DAMAGE_CLIPS", num_values: 0);
320 if (!prop)
321 return -ENOMEM;
322 dev->mode_config.prop_fb_damage_clips = prop;
323
324 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
325 name: "ACTIVE");
326 if (!prop)
327 return -ENOMEM;
328 dev->mode_config.prop_active = prop;
329
330 prop = drm_property_create(dev,
331 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
332 name: "MODE_ID", num_values: 0);
333 if (!prop)
334 return -ENOMEM;
335 dev->mode_config.prop_mode_id = prop;
336
337 prop = drm_property_create_bool(dev, flags: 0,
338 name: "VRR_ENABLED");
339 if (!prop)
340 return -ENOMEM;
341 dev->mode_config.prop_vrr_enabled = prop;
342
343 prop = drm_property_create(dev,
344 DRM_MODE_PROP_BLOB,
345 name: "DEGAMMA_LUT", num_values: 0);
346 if (!prop)
347 return -ENOMEM;
348 dev->mode_config.degamma_lut_property = prop;
349
350 prop = drm_property_create_range(dev,
351 DRM_MODE_PROP_IMMUTABLE,
352 name: "DEGAMMA_LUT_SIZE", min: 0, UINT_MAX);
353 if (!prop)
354 return -ENOMEM;
355 dev->mode_config.degamma_lut_size_property = prop;
356
357 prop = drm_property_create(dev,
358 DRM_MODE_PROP_BLOB,
359 name: "CTM", num_values: 0);
360 if (!prop)
361 return -ENOMEM;
362 dev->mode_config.ctm_property = prop;
363
364 prop = drm_property_create(dev,
365 DRM_MODE_PROP_BLOB,
366 name: "GAMMA_LUT", num_values: 0);
367 if (!prop)
368 return -ENOMEM;
369 dev->mode_config.gamma_lut_property = prop;
370
371 prop = drm_property_create_range(dev,
372 DRM_MODE_PROP_IMMUTABLE,
373 name: "GAMMA_LUT_SIZE", min: 0, UINT_MAX);
374 if (!prop)
375 return -ENOMEM;
376 dev->mode_config.gamma_lut_size_property = prop;
377
378 prop = drm_property_create(dev,
379 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
380 name: "IN_FORMATS", num_values: 0);
381 if (!prop)
382 return -ENOMEM;
383 dev->mode_config.modifiers_property = prop;
384
385 prop = drm_property_create(dev,
386 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
387 name: "IN_FORMATS_ASYNC", num_values: 0);
388 if (!prop)
389 return -ENOMEM;
390 dev->mode_config.async_modifiers_property = prop;
391
392 prop = drm_property_create(dev,
393 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
394 name: "SIZE_HINTS", num_values: 0);
395 if (!prop)
396 return -ENOMEM;
397 dev->mode_config.size_hints_property = prop;
398
399 return 0;
400}
401
402static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
403{
404 drm_mode_config_cleanup(dev);
405}
406
407/**
408 * drmm_mode_config_init - managed DRM mode_configuration structure
409 * initialization
410 * @dev: DRM device
411 *
412 * Initialize @dev's mode_config structure, used for tracking the graphics
413 * configuration of @dev.
414 *
415 * Since this initializes the modeset locks, no locking is possible. Which is no
416 * problem, since this should happen single threaded at init time. It is the
417 * driver's problem to ensure this guarantee.
418 *
419 * Cleanup is automatically handled through registering drm_mode_config_cleanup
420 * with drmm_add_action().
421 *
422 * Returns: 0 on success, negative error value on failure.
423 */
424int drmm_mode_config_init(struct drm_device *dev)
425{
426 int ret;
427
428 mutex_init(&dev->mode_config.mutex);
429 drm_modeset_lock_init(lock: &dev->mode_config.connection_mutex);
430 mutex_init(&dev->mode_config.idr_mutex);
431 mutex_init(&dev->mode_config.fb_lock);
432 mutex_init(&dev->mode_config.blob_lock);
433 INIT_LIST_HEAD(list: &dev->mode_config.fb_list);
434 INIT_LIST_HEAD(list: &dev->mode_config.crtc_list);
435 INIT_LIST_HEAD(list: &dev->mode_config.connector_list);
436 INIT_LIST_HEAD(list: &dev->mode_config.encoder_list);
437 INIT_LIST_HEAD(list: &dev->mode_config.property_list);
438 INIT_LIST_HEAD(list: &dev->mode_config.property_blob_list);
439 INIT_LIST_HEAD(list: &dev->mode_config.plane_list);
440 INIT_LIST_HEAD(list: &dev->mode_config.privobj_list);
441 idr_init_base(idr: &dev->mode_config.object_idr, base: 1);
442 idr_init_base(idr: &dev->mode_config.tile_idr, base: 1);
443 ida_init(ida: &dev->mode_config.connector_ida);
444 spin_lock_init(&dev->mode_config.connector_list_lock);
445
446 init_llist_head(list: &dev->mode_config.connector_free_list);
447 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
448
449 ret = drm_mode_create_standard_properties(dev);
450 if (ret) {
451 drm_mode_config_cleanup(dev);
452 return ret;
453 }
454
455 /* Just to be sure */
456 dev->mode_config.num_fb = 0;
457 dev->mode_config.num_connector = 0;
458 dev->mode_config.num_crtc = 0;
459 dev->mode_config.num_encoder = 0;
460 dev->mode_config.num_total_plane = 0;
461
462 if (IS_ENABLED(CONFIG_LOCKDEP)) {
463 struct drm_modeset_acquire_ctx modeset_ctx;
464 struct ww_acquire_ctx resv_ctx;
465 struct dma_resv resv;
466 int ret;
467
468 dma_resv_init(obj: &resv);
469
470 drm_modeset_acquire_init(ctx: &modeset_ctx, flags: 0);
471 ret = drm_modeset_lock(lock: &dev->mode_config.connection_mutex,
472 ctx: &modeset_ctx);
473 if (ret == -EDEADLK)
474 ret = drm_modeset_backoff(ctx: &modeset_ctx);
475
476 might_fault();
477
478 ww_acquire_init(ctx: &resv_ctx, ww_class: &reservation_ww_class);
479 ret = dma_resv_lock(obj: &resv, ctx: &resv_ctx);
480 if (ret == -EDEADLK)
481 dma_resv_lock_slow(obj: &resv, ctx: &resv_ctx);
482
483 dma_resv_unlock(obj: &resv);
484 ww_acquire_fini(ctx: &resv_ctx);
485
486 drm_modeset_drop_locks(ctx: &modeset_ctx);
487 drm_modeset_acquire_fini(ctx: &modeset_ctx);
488 dma_resv_fini(obj: &resv);
489 }
490
491 return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
492 NULL);
493}
494EXPORT_SYMBOL(drmm_mode_config_init);
495
496/**
497 * drm_mode_config_cleanup - free up DRM mode_config info
498 * @dev: DRM device
499 *
500 * Free up all the connectors and CRTCs associated with this DRM device, then
501 * free up the framebuffers and associated buffer objects.
502 *
503 * Note that since this /should/ happen single-threaded at driver/device
504 * teardown time, no locking is required. It's the driver's job to ensure that
505 * this guarantee actually holds true.
506 *
507 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
508 * drivers to explicitly call this function.
509 */
510void drm_mode_config_cleanup(struct drm_device *dev)
511{
512 struct drm_connector *connector;
513 struct drm_connector_list_iter conn_iter;
514 struct drm_crtc *crtc, *ct;
515 struct drm_encoder *encoder, *enct;
516 struct drm_framebuffer *fb, *fbt;
517 struct drm_property *property, *pt;
518 struct drm_property_blob *blob, *bt;
519 struct drm_plane *plane, *plt;
520
521 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
522 head) {
523 encoder->funcs->destroy(encoder);
524 }
525
526 drm_connector_list_iter_begin(dev, iter: &conn_iter);
527 drm_for_each_connector_iter(connector, &conn_iter) {
528 /* drm_connector_list_iter holds an full reference to the
529 * current connector itself, which means it is inherently safe
530 * against unreferencing the current connector - but not against
531 * deleting it right away. */
532 drm_connector_put(connector);
533 }
534 drm_connector_list_iter_end(iter: &conn_iter);
535 /* connector_iter drops references in a work item. */
536 flush_work(work: &dev->mode_config.connector_free_work);
537 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
538 drm_connector_list_iter_begin(dev, iter: &conn_iter);
539 drm_for_each_connector_iter(connector, &conn_iter)
540 DRM_ERROR("connector %s leaked!\n", connector->name);
541 drm_connector_list_iter_end(iter: &conn_iter);
542 }
543
544 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
545 head) {
546 drm_property_destroy(dev, property);
547 }
548
549 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
550 head) {
551 plane->funcs->destroy(plane);
552 }
553
554 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
555 crtc->funcs->destroy(crtc);
556 }
557
558 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
559 head_global) {
560 drm_property_blob_put(blob);
561 }
562
563 /*
564 * Single-threaded teardown context, so it's not required to grab the
565 * fb_lock to protect against concurrent fb_list access. Contrary, it
566 * would actually deadlock with the drm_framebuffer_cleanup function.
567 *
568 * Also, if there are any framebuffers left, that's a driver leak now,
569 * so politely WARN about this.
570 */
571 WARN_ON(!list_empty(&dev->mode_config.fb_list));
572 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
573 struct drm_printer p = drm_dbg_printer(drm: dev, category: DRM_UT_KMS, prefix: "[leaked fb]");
574
575 drm_printf(p: &p, f: "framebuffer[%u]:\n", fb->base.id);
576 drm_framebuffer_print_info(p: &p, indent: 1, fb);
577 drm_framebuffer_free(kref: &fb->base.refcount);
578 }
579
580 ida_destroy(ida: &dev->mode_config.connector_ida);
581 idr_destroy(&dev->mode_config.tile_idr);
582 idr_destroy(&dev->mode_config.object_idr);
583 drm_modeset_lock_fini(lock: &dev->mode_config.connection_mutex);
584}
585EXPORT_SYMBOL(drm_mode_config_cleanup);
586
587static u32 full_encoder_mask(struct drm_device *dev)
588{
589 struct drm_encoder *encoder;
590 u32 encoder_mask = 0;
591
592 drm_for_each_encoder(encoder, dev)
593 encoder_mask |= drm_encoder_mask(encoder);
594
595 return encoder_mask;
596}
597
598/*
599 * For some reason we want the encoder itself included in
600 * possible_clones. Make life easy for drivers by allowing them
601 * to leave possible_clones unset if no cloning is possible.
602 */
603static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
604{
605 if (encoder->possible_clones == 0)
606 encoder->possible_clones = drm_encoder_mask(encoder);
607}
608
609static void validate_encoder_possible_clones(struct drm_encoder *encoder)
610{
611 struct drm_device *dev = encoder->dev;
612 u32 encoder_mask = full_encoder_mask(dev);
613 struct drm_encoder *other;
614
615 drm_for_each_encoder(other, dev) {
616 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
617 !!(other->possible_clones & drm_encoder_mask(encoder)),
618 "possible_clones mismatch: "
619 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
620 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
621 encoder->base.id, encoder->name,
622 drm_encoder_mask(encoder), encoder->possible_clones,
623 other->base.id, other->name,
624 drm_encoder_mask(other), other->possible_clones);
625 }
626
627 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
628 (encoder->possible_clones & ~encoder_mask) != 0,
629 "Bogus possible_clones: "
630 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
631 encoder->base.id, encoder->name,
632 encoder->possible_clones, encoder_mask);
633}
634
635static u32 full_crtc_mask(struct drm_device *dev)
636{
637 struct drm_crtc *crtc;
638 u32 crtc_mask = 0;
639
640 drm_for_each_crtc(crtc, dev)
641 crtc_mask |= drm_crtc_mask(crtc);
642
643 return crtc_mask;
644}
645
646static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
647{
648 u32 crtc_mask = full_crtc_mask(dev: encoder->dev);
649
650 WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
651 (encoder->possible_crtcs & ~crtc_mask) != 0,
652 "Bogus possible_crtcs: "
653 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
654 encoder->base.id, encoder->name,
655 encoder->possible_crtcs, crtc_mask);
656}
657
658void drm_mode_config_validate(struct drm_device *dev)
659{
660 struct drm_encoder *encoder;
661 struct drm_crtc *crtc;
662 struct drm_plane *plane;
663 u32 primary_with_crtc = 0, cursor_with_crtc = 0;
664 unsigned int num_primary = 0;
665
666 if (!drm_core_check_feature(dev, feature: DRIVER_MODESET))
667 return;
668
669 drm_for_each_encoder(encoder, dev)
670 fixup_encoder_possible_clones(encoder);
671
672 drm_for_each_encoder(encoder, dev) {
673 validate_encoder_possible_clones(encoder);
674 validate_encoder_possible_crtcs(encoder);
675 }
676
677 drm_for_each_crtc(crtc, dev) {
678 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
679 crtc->base.id, crtc->name);
680
681 WARN(crtc->cursor && crtc->funcs->cursor_set,
682 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
683 crtc->base.id, crtc->name);
684 WARN(crtc->cursor && crtc->funcs->cursor_set2,
685 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
686 crtc->base.id, crtc->name);
687 WARN(crtc->cursor && crtc->funcs->cursor_move,
688 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
689 crtc->base.id, crtc->name);
690
691 if (crtc->primary) {
692 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
693 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
694 crtc->primary->base.id, crtc->primary->name,
695 crtc->base.id, crtc->name);
696 WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
697 "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
698 crtc->primary->base.id, crtc->primary->name);
699 primary_with_crtc |= drm_plane_mask(plane: crtc->primary);
700 }
701 if (crtc->cursor) {
702 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
703 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
704 crtc->cursor->base.id, crtc->cursor->name,
705 crtc->base.id, crtc->name);
706 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
707 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
708 crtc->cursor->base.id, crtc->cursor->name);
709 cursor_with_crtc |= drm_plane_mask(plane: crtc->cursor);
710 }
711 }
712
713 drm_for_each_plane(plane, dev) {
714 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
715 num_primary++;
716 }
717
718 WARN(num_primary != dev->mode_config.num_crtc,
719 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
720 num_primary, dev->mode_config.num_crtc);
721}
722