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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_atomic.h>
27#include <drm/drm_drv.h>
28#include <drm/drm_encoder.h>
29#include <drm/drm_file.h>
30#include <drm/drm_framebuffer.h>
31#include <drm/drm_managed.h>
32#include <drm/drm_mode_config.h>
33#include <drm/drm_print.h>
34#include <drm/drm_colorop.h>
35#include <linux/dma-resv.h>
36
37#include "drm_crtc_internal.h"
38#include "drm_internal.h"
39
40int drm_modeset_register_all(struct drm_device *dev)
41{
42 int ret;
43
44 ret = drm_plane_register_all(dev);
45 if (ret)
46 goto err_plane;
47
48 ret = drm_crtc_register_all(dev);
49 if (ret)
50 goto err_crtc;
51
52 ret = drm_encoder_register_all(dev);
53 if (ret)
54 goto err_encoder;
55
56 ret = drm_connector_register_all(dev);
57 if (ret)
58 goto err_connector;
59
60 return 0;
61
62err_connector:
63 drm_encoder_unregister_all(dev);
64err_encoder:
65 drm_crtc_unregister_all(dev);
66err_crtc:
67 drm_plane_unregister_all(dev);
68err_plane:
69 return ret;
70}
71
72void 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 */
94int drm_mode_getresources(struct drm_device *dev, void *data,
95 struct drm_file *file_priv)
96{
97 struct drm_mode_card_res *card_res = data;
98 struct drm_framebuffer *fb;
99 struct drm_connector *connector;
100 struct drm_crtc *crtc;
101 struct drm_encoder *encoder;
102 int count, ret = 0;
103 uint32_t __user *fb_id;
104 uint32_t __user *crtc_id;
105 uint32_t __user *connector_id;
106 uint32_t __user *encoder_id;
107 struct drm_connector_list_iter conn_iter;
108
109 if (!drm_core_check_feature(dev, DRIVER_MODESET))
110 return -EOPNOTSUPP;
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 if (count < card_res->count_fbs &&
117 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 if (drm_lease_held(file_priv, crtc->base.id)) {
135 if (count < card_res->count_crtcs &&
136 put_user(crtc->base.id, crtc_id + count))
137 return -EFAULT;
138 count++;
139 }
140 }
141 card_res->count_crtcs = count;
142
143 count = 0;
144 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
145 drm_for_each_encoder(encoder, dev) {
146 if (count < card_res->count_encoders &&
147 put_user(encoder->base.id, encoder_id + count))
148 return -EFAULT;
149 count++;
150 }
151 card_res->count_encoders = count;
152
153 drm_connector_list_iter_begin(dev, &conn_iter);
154 count = 0;
155 connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
156 /*
157 * FIXME: the connectors on the list may not be fully initialized yet,
158 * if the ioctl is called before the connectors are registered. (See
159 * drm_dev_register()->drm_modeset_register_all() for static and
160 * drm_connector_dynamic_register() for dynamic connectors.)
161 * The driver should only get registered after static connectors are
162 * fully initialized and dynamic connectors should be added to the
163 * connector list only after fully initializing them.
164 */
165 drm_for_each_connector_iter(connector, &conn_iter) {
166 /* only expose writeback connectors if userspace understands them */
167 if (!file_priv->writeback_connectors &&
168 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
169 continue;
170
171 if (drm_lease_held(file_priv, connector->base.id)) {
172 if (count < card_res->count_connectors &&
173 put_user(connector->base.id, connector_id + count)) {
174 drm_connector_list_iter_end(&conn_iter);
175 return -EFAULT;
176 }
177 count++;
178 }
179 }
180 card_res->count_connectors = count;
181 drm_connector_list_iter_end(&conn_iter);
182
183 return ret;
184}
185
186static int drm_mode_config_plane_create_state(struct drm_plane *plane)
187{
188 struct drm_plane_state *plane_state;
189
190 if (!plane->funcs->atomic_create_state)
191 return 0;
192
193 plane_state = plane->funcs->atomic_create_state(plane);
194 if (IS_ERR(plane_state))
195 return PTR_ERR(plane_state);
196
197 plane->state = plane_state;
198
199 return 0;
200}
201
202static int drm_mode_config_plane_reset_with_create_state(struct drm_plane *plane)
203{
204 if (plane->state) {
205 plane->funcs->atomic_destroy_state(plane, plane->state);
206 plane->state = NULL;
207 }
208
209 return drm_mode_config_plane_create_state(plane);
210}
211
212static int drm_mode_config_crtc_create_state(struct drm_crtc *crtc)
213{
214 struct drm_crtc_state *crtc_state;
215
216 if (!crtc->funcs->atomic_create_state)
217 return 0;
218
219 crtc_state = crtc->funcs->atomic_create_state(crtc);
220 if (IS_ERR(crtc_state))
221 return PTR_ERR(crtc_state);
222
223 if (drm_dev_has_vblank(crtc->dev))
224 drm_crtc_vblank_reset(crtc);
225
226 crtc->state = crtc_state;
227
228 return 0;
229}
230
231static int drm_mode_config_crtc_reset_with_create_state(struct drm_crtc *crtc)
232{
233 if (crtc->state) {
234 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
235 crtc->state = NULL;
236 }
237
238 return drm_mode_config_crtc_create_state(crtc);
239}
240
241static int drm_mode_config_connector_create_state(struct drm_connector *connector)
242{
243 struct drm_connector_state *conn_state;
244
245 if (!connector->funcs->atomic_create_state)
246 return 0;
247
248 conn_state = connector->funcs->atomic_create_state(connector);
249 if (IS_ERR(conn_state))
250 return PTR_ERR(conn_state);
251
252 connector->state = conn_state;
253
254 return 0;
255}
256
257static int drm_mode_config_connector_reset_with_create_state(struct drm_connector *connector)
258{
259 if (connector->state) {
260 connector->funcs->atomic_destroy_state(connector, connector->state);
261 connector->state = NULL;
262 }
263
264 return drm_mode_config_connector_create_state(connector);
265}
266
267/**
268 * drm_mode_config_reset - call ->reset callbacks
269 * @dev: drm device
270 *
271 * This functions calls all the crtc's, encoder's and connector's ->reset
272 * callback. Drivers can use this in e.g. their driver load or resume code to
273 * reset hardware and software state.
274 *
275 * Note that &drm_private_obj structures are expected to be stable across
276 * suspend/resume cycles, and drm_mode_config_reset() does not affect these
277 * structures.
278 */
279void drm_mode_config_reset(struct drm_device *dev)
280{
281 struct drm_crtc *crtc;
282 struct drm_colorop *colorop;
283 struct drm_plane *plane;
284 struct drm_encoder *encoder;
285 struct drm_connector *connector;
286 struct drm_connector_list_iter conn_iter;
287
288 drm_for_each_colorop(colorop, dev)
289 drm_colorop_reset(colorop);
290
291 drm_for_each_plane(plane, dev) {
292 if (plane->funcs->reset)
293 plane->funcs->reset(plane);
294 else if (plane->funcs->atomic_create_state)
295 drm_mode_config_plane_reset_with_create_state(plane);
296 }
297
298 drm_for_each_crtc(crtc, dev) {
299 if (crtc->funcs->reset)
300 crtc->funcs->reset(crtc);
301 else if (crtc->funcs->atomic_create_state)
302 drm_mode_config_crtc_reset_with_create_state(crtc);
303 }
304
305 drm_for_each_encoder(encoder, dev)
306 if (encoder->funcs && encoder->funcs->reset)
307 encoder->funcs->reset(encoder);
308
309 drm_connector_list_iter_begin(dev, &conn_iter);
310 drm_for_each_connector_iter(connector, &conn_iter) {
311 if (connector->funcs->reset)
312 connector->funcs->reset(connector);
313 else if (connector->funcs->atomic_create_state)
314 drm_mode_config_connector_reset_with_create_state(connector);
315 }
316 drm_connector_list_iter_end(&conn_iter);
317}
318EXPORT_SYMBOL(drm_mode_config_reset);
319
320/**
321 * drm_mode_config_create_initial_state - Allocates the initial state
322 * @dev: drm device
323 *
324 * This functions creates the initial state for all the objects. Drivers
325 * can use this in e.g. probe to initialize their software state.
326 *
327 * It has two main differences with drm_mode_config_reset(): the reset()
328 * hooks aren't called and thus the hardware will be left untouched, but
329 * also the &drm_private_obj structures will be initialized as opposed
330 * to drm_mode_config_reset() that skips them.
331 *
332 * Returns: 0 on success, negative error value on failure.
333 */
334int drm_mode_config_create_initial_state(struct drm_device *dev)
335{
336 struct drm_crtc *crtc;
337 struct drm_colorop *colorop;
338 struct drm_plane *plane;
339 struct drm_connector *connector;
340 struct drm_connector_list_iter conn_iter;
341 struct drm_private_obj *privobj;
342 int ret;
343
344 drm_for_each_privobj(privobj, dev) {
345 struct drm_private_state *privobj_state;
346
347 if (privobj->state)
348 continue;
349
350 if (!privobj->funcs->atomic_create_state)
351 continue;
352
353 privobj_state = privobj->funcs->atomic_create_state(privobj);
354 if (IS_ERR(privobj_state))
355 return PTR_ERR(privobj_state);
356
357 privobj->state = privobj_state;
358 }
359
360 drm_for_each_colorop(colorop, dev) {
361 struct drm_colorop_state *colorop_state;
362
363 if (colorop->state)
364 continue;
365
366 colorop_state = drm_atomic_helper_colorop_create_state(colorop);
367 if (IS_ERR(colorop_state))
368 return PTR_ERR(colorop_state);
369
370 colorop->state = colorop_state;
371 }
372
373 drm_for_each_plane(plane, dev) {
374 if (plane->state)
375 continue;
376
377 ret = drm_mode_config_plane_create_state(plane);
378 if (ret)
379 return ret;
380 }
381
382 drm_for_each_crtc(crtc, dev) {
383 if (crtc->state)
384 continue;
385
386 ret = drm_mode_config_crtc_create_state(crtc);
387 if (ret)
388 return ret;
389 }
390
391 drm_connector_list_iter_begin(dev, &conn_iter);
392 drm_for_each_connector_iter(connector, &conn_iter) {
393 if (connector->state)
394 continue;
395
396 ret = drm_mode_config_connector_create_state(connector);
397 if (ret) {
398 drm_connector_list_iter_end(&conn_iter);
399 return ret;
400 }
401 }
402 drm_connector_list_iter_end(&conn_iter);
403
404 return 0;
405}
406EXPORT_SYMBOL(drm_mode_config_create_initial_state);
407
408/*
409 * Global properties
410 */
411static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
412 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
413 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
414 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
415};
416
417static int drm_mode_create_standard_properties(struct drm_device *dev)
418{
419 struct drm_property *prop;
420 int ret;
421
422 ret = drm_connector_create_standard_properties(dev);
423 if (ret)
424 return ret;
425
426 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
427 "type", drm_plane_type_enum_list,
428 ARRAY_SIZE(drm_plane_type_enum_list));
429 if (!prop)
430 return -ENOMEM;
431 dev->mode_config.plane_type_property = prop;
432
433 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
434 "SRC_X", 0, UINT_MAX);
435 if (!prop)
436 return -ENOMEM;
437 dev->mode_config.prop_src_x = prop;
438
439 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
440 "SRC_Y", 0, UINT_MAX);
441 if (!prop)
442 return -ENOMEM;
443 dev->mode_config.prop_src_y = prop;
444
445 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
446 "SRC_W", 0, UINT_MAX);
447 if (!prop)
448 return -ENOMEM;
449 dev->mode_config.prop_src_w = prop;
450
451 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
452 "SRC_H", 0, UINT_MAX);
453 if (!prop)
454 return -ENOMEM;
455 dev->mode_config.prop_src_h = prop;
456
457 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
458 "CRTC_X", INT_MIN, INT_MAX);
459 if (!prop)
460 return -ENOMEM;
461 dev->mode_config.prop_crtc_x = prop;
462
463 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
464 "CRTC_Y", INT_MIN, INT_MAX);
465 if (!prop)
466 return -ENOMEM;
467 dev->mode_config.prop_crtc_y = prop;
468
469 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
470 "CRTC_W", 0, INT_MAX);
471 if (!prop)
472 return -ENOMEM;
473 dev->mode_config.prop_crtc_w = prop;
474
475 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
476 "CRTC_H", 0, INT_MAX);
477 if (!prop)
478 return -ENOMEM;
479 dev->mode_config.prop_crtc_h = prop;
480
481 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
482 "FB_ID", DRM_MODE_OBJECT_FB);
483 if (!prop)
484 return -ENOMEM;
485 dev->mode_config.prop_fb_id = prop;
486
487 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
488 "IN_FENCE_FD", -1, INT_MAX);
489 if (!prop)
490 return -ENOMEM;
491 dev->mode_config.prop_in_fence_fd = prop;
492
493 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
494 "OUT_FENCE_PTR", 0, U64_MAX);
495 if (!prop)
496 return -ENOMEM;
497 dev->mode_config.prop_out_fence_ptr = prop;
498
499 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
500 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
501 if (!prop)
502 return -ENOMEM;
503 dev->mode_config.prop_crtc_id = prop;
504
505 prop = drm_property_create(dev,
506 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
507 "FB_DAMAGE_CLIPS", 0);
508 if (!prop)
509 return -ENOMEM;
510 dev->mode_config.prop_fb_damage_clips = prop;
511
512 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
513 "ACTIVE");
514 if (!prop)
515 return -ENOMEM;
516 dev->mode_config.prop_active = prop;
517
518 prop = drm_property_create(dev,
519 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
520 "MODE_ID", 0);
521 if (!prop)
522 return -ENOMEM;
523 dev->mode_config.prop_mode_id = prop;
524
525 prop = drm_property_create_bool(dev, 0,
526 "VRR_ENABLED");
527 if (!prop)
528 return -ENOMEM;
529 dev->mode_config.prop_vrr_enabled = prop;
530
531 prop = drm_property_create(dev,
532 DRM_MODE_PROP_BLOB,
533 "DEGAMMA_LUT", 0);
534 if (!prop)
535 return -ENOMEM;
536 dev->mode_config.degamma_lut_property = prop;
537
538 prop = drm_property_create_range(dev,
539 DRM_MODE_PROP_IMMUTABLE,
540 "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
541 if (!prop)
542 return -ENOMEM;
543 dev->mode_config.degamma_lut_size_property = prop;
544
545 prop = drm_property_create(dev,
546 DRM_MODE_PROP_BLOB,
547 "CTM", 0);
548 if (!prop)
549 return -ENOMEM;
550 dev->mode_config.ctm_property = prop;
551
552 prop = drm_property_create(dev,
553 DRM_MODE_PROP_BLOB,
554 "GAMMA_LUT", 0);
555 if (!prop)
556 return -ENOMEM;
557 dev->mode_config.gamma_lut_property = prop;
558
559 prop = drm_property_create_range(dev,
560 DRM_MODE_PROP_IMMUTABLE,
561 "GAMMA_LUT_SIZE", 0, UINT_MAX);
562 if (!prop)
563 return -ENOMEM;
564 dev->mode_config.gamma_lut_size_property = prop;
565
566 prop = drm_property_create_range(dev, 0,
567 "BACKGROUND_COLOR", 0, U64_MAX);
568 if (!prop)
569 return -ENOMEM;
570 dev->mode_config.background_color_property = prop;
571
572 prop = drm_property_create(dev,
573 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
574 "IN_FORMATS", 0);
575 if (!prop)
576 return -ENOMEM;
577 dev->mode_config.modifiers_property = prop;
578
579 prop = drm_property_create(dev,
580 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
581 "IN_FORMATS_ASYNC", 0);
582 if (!prop)
583 return -ENOMEM;
584 dev->mode_config.async_modifiers_property = prop;
585
586 prop = drm_property_create(dev,
587 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
588 "SIZE_HINTS", 0);
589 if (!prop)
590 return -ENOMEM;
591 dev->mode_config.size_hints_property = prop;
592
593 return 0;
594}
595
596static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
597{
598 drm_mode_config_cleanup(dev);
599}
600
601/**
602 * drmm_mode_config_init - managed DRM mode_configuration structure
603 * initialization
604 * @dev: DRM device
605 *
606 * Initialize @dev's mode_config structure, used for tracking the graphics
607 * configuration of @dev.
608 *
609 * Since this initializes the modeset locks, no locking is possible. Which is no
610 * problem, since this should happen single threaded at init time. It is the
611 * driver's problem to ensure this guarantee.
612 *
613 * Cleanup is automatically handled through registering drm_mode_config_cleanup
614 * with drmm_add_action().
615 *
616 * Returns: 0 on success, negative error value on failure.
617 */
618int drmm_mode_config_init(struct drm_device *dev)
619{
620 int ret;
621
622 mutex_init(&dev->mode_config.mutex);
623 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
624 mutex_init(&dev->mode_config.idr_mutex);
625 mutex_init(&dev->mode_config.fb_lock);
626 mutex_init(&dev->mode_config.blob_lock);
627 INIT_LIST_HEAD(&dev->mode_config.fb_list);
628 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
629 INIT_LIST_HEAD(&dev->mode_config.connector_list);
630 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
631 INIT_LIST_HEAD(&dev->mode_config.property_list);
632 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
633 INIT_LIST_HEAD(&dev->mode_config.plane_list);
634 INIT_LIST_HEAD(&dev->mode_config.colorop_list);
635 INIT_LIST_HEAD(&dev->mode_config.privobj_list);
636 idr_init_base(&dev->mode_config.object_idr, 1);
637 idr_init_base(&dev->mode_config.tile_idr, 1);
638 ida_init(&dev->mode_config.connector_ida);
639 spin_lock_init(&dev->mode_config.connector_list_lock);
640
641 init_llist_head(&dev->mode_config.connector_free_list);
642 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
643
644 ret = drm_mode_create_standard_properties(dev);
645 if (ret) {
646 drm_mode_config_cleanup(dev);
647 return ret;
648 }
649
650 /* Just to be sure */
651 dev->mode_config.num_fb = 0;
652 dev->mode_config.num_connector = 0;
653 dev->mode_config.num_crtc = 0;
654 dev->mode_config.num_encoder = 0;
655 dev->mode_config.num_total_plane = 0;
656 dev->mode_config.num_colorop = 0;
657
658 if (IS_ENABLED(CONFIG_LOCKDEP)) {
659 struct drm_modeset_acquire_ctx modeset_ctx;
660 struct ww_acquire_ctx resv_ctx;
661 struct dma_resv resv;
662 int ret;
663
664 dma_resv_init(&resv);
665
666 drm_modeset_acquire_init(&modeset_ctx, 0);
667 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
668 &modeset_ctx);
669 if (ret == -EDEADLK)
670 ret = drm_modeset_backoff(&modeset_ctx);
671
672 might_fault();
673
674 ww_acquire_init(&resv_ctx, &reservation_ww_class);
675 ret = dma_resv_lock(&resv, &resv_ctx);
676 if (ret == -EDEADLK)
677 dma_resv_lock_slow(&resv, &resv_ctx);
678
679 dma_resv_unlock(&resv);
680 ww_acquire_fini(&resv_ctx);
681
682 drm_modeset_drop_locks(&modeset_ctx);
683 drm_modeset_acquire_fini(&modeset_ctx);
684 dma_resv_fini(&resv);
685 }
686
687 return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
688 NULL);
689}
690EXPORT_SYMBOL(drmm_mode_config_init);
691
692/**
693 * drm_mode_config_cleanup - free up DRM mode_config info
694 * @dev: DRM device
695 *
696 * Free up all the connectors and CRTCs associated with this DRM device, then
697 * free up the framebuffers and associated buffer objects.
698 *
699 * Note that since this /should/ happen single-threaded at driver/device
700 * teardown time, no locking is required. It's the driver's job to ensure that
701 * this guarantee actually holds true.
702 *
703 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
704 * drivers to explicitly call this function.
705 */
706void drm_mode_config_cleanup(struct drm_device *dev)
707{
708 struct drm_connector *connector;
709 struct drm_connector_list_iter conn_iter;
710 struct drm_crtc *crtc, *ct;
711 struct drm_encoder *encoder, *enct;
712 struct drm_framebuffer *fb, *fbt;
713 struct drm_property *property, *pt;
714 struct drm_property_blob *blob, *bt;
715 struct drm_plane *plane, *plt;
716 struct drm_colorop *colorop, *copt;
717
718 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
719 head) {
720 encoder->funcs->destroy(encoder);
721 }
722
723 drm_connector_list_iter_begin(dev, &conn_iter);
724 drm_for_each_connector_iter(connector, &conn_iter) {
725 /* drm_connector_list_iter holds an full reference to the
726 * current connector itself, which means it is inherently safe
727 * against unreferencing the current connector - but not against
728 * deleting it right away. */
729 drm_connector_put(connector);
730 }
731 drm_connector_list_iter_end(&conn_iter);
732 /* connector_iter drops references in a work item. */
733 flush_work(&dev->mode_config.connector_free_work);
734 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
735 drm_connector_list_iter_begin(dev, &conn_iter);
736 drm_for_each_connector_iter(connector, &conn_iter)
737 DRM_ERROR("connector %s leaked!\n", connector->name);
738 drm_connector_list_iter_end(&conn_iter);
739 }
740
741 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
742 head) {
743 drm_property_destroy(dev, property);
744 }
745
746 list_for_each_entry_safe(colorop, copt, &dev->mode_config.colorop_list,
747 head) {
748 colorop->funcs->destroy(colorop);
749 }
750
751 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
752 head) {
753 plane->funcs->destroy(plane);
754 }
755
756 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
757 crtc->funcs->destroy(crtc);
758 }
759
760 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
761 head_global) {
762 drm_property_blob_put(blob);
763 }
764
765 /*
766 * Single-threaded teardown context, so it's not required to grab the
767 * fb_lock to protect against concurrent fb_list access. Contrary, it
768 * would actually deadlock with the drm_framebuffer_cleanup function.
769 *
770 * Also, if there are any framebuffers left, that's a driver leak now,
771 * so politely WARN about this.
772 */
773 WARN_ON(!list_empty(&dev->mode_config.fb_list));
774 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
775 struct drm_printer p = drm_dbg_printer(dev, DRM_UT_KMS, "[leaked fb]");
776
777 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
778 drm_framebuffer_print_info(&p, 1, fb);
779 drm_framebuffer_free(&fb->base.refcount);
780 }
781
782 ida_destroy(&dev->mode_config.connector_ida);
783 idr_destroy(&dev->mode_config.tile_idr);
784 idr_destroy(&dev->mode_config.object_idr);
785 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
786}
787EXPORT_SYMBOL(drm_mode_config_cleanup);
788
789static u32 full_encoder_mask(struct drm_device *dev)
790{
791 struct drm_encoder *encoder;
792 u32 encoder_mask = 0;
793
794 drm_for_each_encoder(encoder, dev)
795 encoder_mask |= drm_encoder_mask(encoder);
796
797 return encoder_mask;
798}
799
800/*
801 * For some reason we want the encoder itself included in
802 * possible_clones. Make life easy for drivers by allowing them
803 * to leave possible_clones unset if no cloning is possible.
804 */
805static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
806{
807 if (encoder->possible_clones == 0)
808 encoder->possible_clones = drm_encoder_mask(encoder);
809}
810
811static void validate_encoder_possible_clones(struct drm_encoder *encoder)
812{
813 struct drm_device *dev = encoder->dev;
814 u32 encoder_mask = full_encoder_mask(dev);
815 struct drm_encoder *other;
816
817 drm_for_each_encoder(other, dev) {
818 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
819 !!(other->possible_clones & drm_encoder_mask(encoder)),
820 "possible_clones mismatch: "
821 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
822 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
823 encoder->base.id, encoder->name,
824 drm_encoder_mask(encoder), encoder->possible_clones,
825 other->base.id, other->name,
826 drm_encoder_mask(other), other->possible_clones);
827 }
828
829 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
830 (encoder->possible_clones & ~encoder_mask) != 0,
831 "Bogus possible_clones: "
832 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
833 encoder->base.id, encoder->name,
834 encoder->possible_clones, encoder_mask);
835}
836
837static u32 full_crtc_mask(struct drm_device *dev)
838{
839 struct drm_crtc *crtc;
840 u32 crtc_mask = 0;
841
842 drm_for_each_crtc(crtc, dev)
843 crtc_mask |= drm_crtc_mask(crtc);
844
845 return crtc_mask;
846}
847
848static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
849{
850 u32 crtc_mask = full_crtc_mask(encoder->dev);
851
852 WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
853 (encoder->possible_crtcs & ~crtc_mask) != 0,
854 "Bogus possible_crtcs: "
855 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
856 encoder->base.id, encoder->name,
857 encoder->possible_crtcs, crtc_mask);
858}
859
860static void validate_blend_mode_for_alpha_formats(struct drm_plane *plane)
861{
862 const struct drm_format_info *fmt;
863 u32 i;
864
865 /* blend mode property supported, no need to check anything */
866 if (plane->blend_mode_property)
867 return;
868
869 for (i = 0; i < plane->format_count; i++) {
870 fmt = drm_format_info(plane->format_types[i]);
871 if (fmt->has_alpha) {
872 drm_warn(plane->dev,
873 "[PLANE:%d:%s] pixel format with alpha exposed but blend mode not setup. Please fix.\n",
874 plane->base.id, plane->name);
875 break;
876 }
877 }
878}
879
880void drm_mode_config_validate(struct drm_device *dev)
881{
882 struct drm_encoder *encoder;
883 struct drm_crtc *crtc;
884 struct drm_plane *plane;
885 u32 primary_with_crtc = 0, cursor_with_crtc = 0;
886 unsigned int num_primary = 0;
887
888 if (!drm_core_check_feature(dev, DRIVER_MODESET))
889 return;
890
891 drm_for_each_encoder(encoder, dev)
892 fixup_encoder_possible_clones(encoder);
893
894 drm_for_each_encoder(encoder, dev) {
895 validate_encoder_possible_clones(encoder);
896 validate_encoder_possible_crtcs(encoder);
897 }
898
899 drm_for_each_crtc(crtc, dev) {
900 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
901 crtc->base.id, crtc->name);
902
903 WARN(crtc->cursor && crtc->funcs->cursor_set,
904 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
905 crtc->base.id, crtc->name);
906 WARN(crtc->cursor && crtc->funcs->cursor_set2,
907 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
908 crtc->base.id, crtc->name);
909 WARN(crtc->cursor && crtc->funcs->cursor_move,
910 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
911 crtc->base.id, crtc->name);
912
913 if (crtc->primary) {
914 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
915 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
916 crtc->primary->base.id, crtc->primary->name,
917 crtc->base.id, crtc->name);
918 WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
919 "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
920 crtc->primary->base.id, crtc->primary->name);
921 primary_with_crtc |= drm_plane_mask(crtc->primary);
922 }
923 if (crtc->cursor) {
924 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
925 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
926 crtc->cursor->base.id, crtc->cursor->name,
927 crtc->base.id, crtc->name);
928 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
929 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
930 crtc->cursor->base.id, crtc->cursor->name);
931 cursor_with_crtc |= drm_plane_mask(crtc->cursor);
932 }
933 }
934
935 drm_for_each_plane(plane, dev) {
936 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
937 num_primary++;
938
939 validate_blend_mode_for_alpha_formats(plane);
940 }
941
942 WARN(num_primary != dev->mode_config.num_crtc,
943 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
944 num_primary, dev->mode_config.num_crtc);
945}