Line data Source code
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 :
36 0 : int drm_modeset_register_all(struct drm_device *dev)
37 : {
38 : int ret;
39 :
40 0 : ret = drm_plane_register_all(dev);
41 0 : if (ret)
42 : goto err_plane;
43 :
44 0 : ret = drm_crtc_register_all(dev);
45 0 : if (ret)
46 : goto err_crtc;
47 :
48 0 : ret = drm_encoder_register_all(dev);
49 0 : if (ret)
50 : goto err_encoder;
51 :
52 0 : ret = drm_connector_register_all(dev);
53 0 : if (ret)
54 : goto err_connector;
55 :
56 : return 0;
57 :
58 : err_connector:
59 0 : drm_encoder_unregister_all(dev);
60 : err_encoder:
61 0 : drm_crtc_unregister_all(dev);
62 : err_crtc:
63 0 : drm_plane_unregister_all(dev);
64 : err_plane:
65 : return ret;
66 : }
67 :
68 0 : void drm_modeset_unregister_all(struct drm_device *dev)
69 : {
70 0 : drm_connector_unregister_all(dev);
71 0 : drm_encoder_unregister_all(dev);
72 0 : drm_crtc_unregister_all(dev);
73 0 : drm_plane_unregister_all(dev);
74 0 : }
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 : */
90 0 : int drm_mode_getresources(struct drm_device *dev, void *data,
91 : struct drm_file *file_priv)
92 : {
93 0 : 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 0 : 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 0 : if (!drm_core_check_feature(dev, DRIVER_MODESET))
106 : return -EOPNOTSUPP;
107 :
108 0 : mutex_lock(&file_priv->fbs_lock);
109 0 : count = 0;
110 0 : fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
111 0 : list_for_each_entry(fb, &file_priv->fbs, filp_head) {
112 0 : if (count < card_res->count_fbs &&
113 0 : put_user(fb->base.id, fb_id + count)) {
114 0 : mutex_unlock(&file_priv->fbs_lock);
115 0 : return -EFAULT;
116 : }
117 0 : count++;
118 : }
119 0 : card_res->count_fbs = count;
120 0 : mutex_unlock(&file_priv->fbs_lock);
121 :
122 0 : card_res->max_height = dev->mode_config.max_height;
123 0 : card_res->min_height = dev->mode_config.min_height;
124 0 : card_res->max_width = dev->mode_config.max_width;
125 0 : card_res->min_width = dev->mode_config.min_width;
126 :
127 0 : count = 0;
128 0 : crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
129 0 : drm_for_each_crtc(crtc, dev) {
130 0 : if (drm_lease_held(file_priv, crtc->base.id)) {
131 0 : if (count < card_res->count_crtcs &&
132 0 : put_user(crtc->base.id, crtc_id + count))
133 : return -EFAULT;
134 0 : count++;
135 : }
136 : }
137 0 : card_res->count_crtcs = count;
138 :
139 0 : count = 0;
140 0 : encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
141 0 : drm_for_each_encoder(encoder, dev) {
142 0 : if (count < card_res->count_encoders &&
143 0 : put_user(encoder->base.id, encoder_id + count))
144 : return -EFAULT;
145 0 : count++;
146 : }
147 0 : card_res->count_encoders = count;
148 :
149 0 : drm_connector_list_iter_begin(dev, &conn_iter);
150 0 : count = 0;
151 0 : connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
152 0 : drm_for_each_connector_iter(connector, &conn_iter) {
153 : /* only expose writeback connectors if userspace understands them */
154 0 : if (!file_priv->writeback_connectors &&
155 0 : (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
156 0 : continue;
157 :
158 0 : if (drm_lease_held(file_priv, connector->base.id)) {
159 0 : if (count < card_res->count_connectors &&
160 0 : put_user(connector->base.id, connector_id + count)) {
161 0 : drm_connector_list_iter_end(&conn_iter);
162 0 : return -EFAULT;
163 : }
164 0 : count++;
165 : }
166 : }
167 0 : card_res->count_connectors = count;
168 0 : drm_connector_list_iter_end(&conn_iter);
169 :
170 0 : 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 : */
181 0 : void 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 0 : drm_for_each_plane(plane, dev)
190 0 : if (plane->funcs->reset)
191 0 : plane->funcs->reset(plane);
192 :
193 0 : drm_for_each_crtc(crtc, dev)
194 0 : if (crtc->funcs->reset)
195 0 : crtc->funcs->reset(crtc);
196 :
197 0 : drm_for_each_encoder(encoder, dev)
198 0 : if (encoder->funcs && encoder->funcs->reset)
199 0 : encoder->funcs->reset(encoder);
200 :
201 0 : drm_connector_list_iter_begin(dev, &conn_iter);
202 0 : drm_for_each_connector_iter(connector, &conn_iter)
203 0 : if (connector->funcs->reset)
204 0 : connector->funcs->reset(connector);
205 0 : drm_connector_list_iter_end(&conn_iter);
206 0 : }
207 : EXPORT_SYMBOL(drm_mode_config_reset);
208 :
209 : /*
210 : * Global properties
211 : */
212 : static 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 :
218 0 : static int drm_mode_create_standard_properties(struct drm_device *dev)
219 : {
220 : struct drm_property *prop;
221 : int ret;
222 :
223 0 : ret = drm_connector_create_standard_properties(dev);
224 0 : if (ret)
225 : return ret;
226 :
227 0 : 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 0 : if (!prop)
231 : return -ENOMEM;
232 0 : dev->mode_config.plane_type_property = prop;
233 :
234 0 : prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
235 : "SRC_X", 0, UINT_MAX);
236 0 : if (!prop)
237 : return -ENOMEM;
238 0 : dev->mode_config.prop_src_x = prop;
239 :
240 0 : prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
241 : "SRC_Y", 0, UINT_MAX);
242 0 : if (!prop)
243 : return -ENOMEM;
244 0 : dev->mode_config.prop_src_y = prop;
245 :
246 0 : prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
247 : "SRC_W", 0, UINT_MAX);
248 0 : if (!prop)
249 : return -ENOMEM;
250 0 : dev->mode_config.prop_src_w = prop;
251 :
252 0 : prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
253 : "SRC_H", 0, UINT_MAX);
254 0 : if (!prop)
255 : return -ENOMEM;
256 0 : dev->mode_config.prop_src_h = prop;
257 :
258 0 : prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
259 : "CRTC_X", INT_MIN, INT_MAX);
260 0 : if (!prop)
261 : return -ENOMEM;
262 0 : dev->mode_config.prop_crtc_x = prop;
263 :
264 0 : prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
265 : "CRTC_Y", INT_MIN, INT_MAX);
266 0 : if (!prop)
267 : return -ENOMEM;
268 0 : dev->mode_config.prop_crtc_y = prop;
269 :
270 0 : prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
271 : "CRTC_W", 0, INT_MAX);
272 0 : if (!prop)
273 : return -ENOMEM;
274 0 : dev->mode_config.prop_crtc_w = prop;
275 :
276 0 : prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
277 : "CRTC_H", 0, INT_MAX);
278 0 : if (!prop)
279 : return -ENOMEM;
280 0 : dev->mode_config.prop_crtc_h = prop;
281 :
282 0 : prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
283 : "FB_ID", DRM_MODE_OBJECT_FB);
284 0 : if (!prop)
285 : return -ENOMEM;
286 0 : dev->mode_config.prop_fb_id = prop;
287 :
288 0 : prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
289 : "IN_FENCE_FD", -1, INT_MAX);
290 0 : if (!prop)
291 : return -ENOMEM;
292 0 : dev->mode_config.prop_in_fence_fd = prop;
293 :
294 0 : prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
295 : "OUT_FENCE_PTR", 0, U64_MAX);
296 0 : if (!prop)
297 : return -ENOMEM;
298 0 : dev->mode_config.prop_out_fence_ptr = prop;
299 :
300 0 : prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
301 : "CRTC_ID", DRM_MODE_OBJECT_CRTC);
302 0 : if (!prop)
303 : return -ENOMEM;
304 0 : dev->mode_config.prop_crtc_id = prop;
305 :
306 0 : prop = drm_property_create(dev,
307 : DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
308 : "FB_DAMAGE_CLIPS", 0);
309 0 : if (!prop)
310 : return -ENOMEM;
311 0 : dev->mode_config.prop_fb_damage_clips = prop;
312 :
313 0 : prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
314 : "ACTIVE");
315 0 : if (!prop)
316 : return -ENOMEM;
317 0 : dev->mode_config.prop_active = prop;
318 :
319 0 : prop = drm_property_create(dev,
320 : DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
321 : "MODE_ID", 0);
322 0 : if (!prop)
323 : return -ENOMEM;
324 0 : dev->mode_config.prop_mode_id = prop;
325 :
326 0 : prop = drm_property_create_bool(dev, 0,
327 : "VRR_ENABLED");
328 0 : if (!prop)
329 : return -ENOMEM;
330 0 : dev->mode_config.prop_vrr_enabled = prop;
331 :
332 0 : prop = drm_property_create(dev,
333 : DRM_MODE_PROP_BLOB,
334 : "DEGAMMA_LUT", 0);
335 0 : if (!prop)
336 : return -ENOMEM;
337 0 : dev->mode_config.degamma_lut_property = prop;
338 :
339 0 : prop = drm_property_create_range(dev,
340 : DRM_MODE_PROP_IMMUTABLE,
341 : "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
342 0 : if (!prop)
343 : return -ENOMEM;
344 0 : dev->mode_config.degamma_lut_size_property = prop;
345 :
346 0 : prop = drm_property_create(dev,
347 : DRM_MODE_PROP_BLOB,
348 : "CTM", 0);
349 0 : if (!prop)
350 : return -ENOMEM;
351 0 : dev->mode_config.ctm_property = prop;
352 :
353 0 : prop = drm_property_create(dev,
354 : DRM_MODE_PROP_BLOB,
355 : "GAMMA_LUT", 0);
356 0 : if (!prop)
357 : return -ENOMEM;
358 0 : dev->mode_config.gamma_lut_property = prop;
359 :
360 0 : prop = drm_property_create_range(dev,
361 : DRM_MODE_PROP_IMMUTABLE,
362 : "GAMMA_LUT_SIZE", 0, UINT_MAX);
363 0 : if (!prop)
364 : return -ENOMEM;
365 0 : dev->mode_config.gamma_lut_size_property = prop;
366 :
367 0 : prop = drm_property_create(dev,
368 : DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
369 : "IN_FORMATS", 0);
370 0 : if (!prop)
371 : return -ENOMEM;
372 0 : dev->mode_config.modifiers_property = prop;
373 :
374 0 : return 0;
375 : }
376 :
377 0 : static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
378 : {
379 0 : drm_mode_config_cleanup(dev);
380 0 : }
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 : */
399 0 : int drmm_mode_config_init(struct drm_device *dev)
400 : {
401 0 : mutex_init(&dev->mode_config.mutex);
402 0 : drm_modeset_lock_init(&dev->mode_config.connection_mutex);
403 0 : mutex_init(&dev->mode_config.idr_mutex);
404 0 : mutex_init(&dev->mode_config.fb_lock);
405 0 : mutex_init(&dev->mode_config.blob_lock);
406 0 : INIT_LIST_HEAD(&dev->mode_config.fb_list);
407 0 : INIT_LIST_HEAD(&dev->mode_config.crtc_list);
408 0 : INIT_LIST_HEAD(&dev->mode_config.connector_list);
409 0 : INIT_LIST_HEAD(&dev->mode_config.encoder_list);
410 0 : INIT_LIST_HEAD(&dev->mode_config.property_list);
411 0 : INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
412 0 : INIT_LIST_HEAD(&dev->mode_config.plane_list);
413 0 : INIT_LIST_HEAD(&dev->mode_config.privobj_list);
414 0 : idr_init(&dev->mode_config.object_idr);
415 0 : idr_init(&dev->mode_config.tile_idr);
416 0 : ida_init(&dev->mode_config.connector_ida);
417 0 : spin_lock_init(&dev->mode_config.connector_list_lock);
418 :
419 0 : init_llist_head(&dev->mode_config.connector_free_list);
420 0 : INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
421 :
422 0 : drm_mode_create_standard_properties(dev);
423 :
424 : /* Just to be sure */
425 0 : dev->mode_config.num_fb = 0;
426 0 : dev->mode_config.num_connector = 0;
427 0 : dev->mode_config.num_crtc = 0;
428 0 : dev->mode_config.num_encoder = 0;
429 0 : 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 0 : return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
459 : NULL);
460 : }
461 : EXPORT_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 : */
477 0 : void 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 0 : list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
489 : head) {
490 0 : encoder->funcs->destroy(encoder);
491 : }
492 :
493 0 : drm_connector_list_iter_begin(dev, &conn_iter);
494 0 : 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 0 : drm_connector_list_iter_end(&conn_iter);
502 : /* connector_iter drops references in a work item. */
503 0 : flush_work(&dev->mode_config.connector_free_work);
504 0 : if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
505 0 : drm_connector_list_iter_begin(dev, &conn_iter);
506 0 : drm_for_each_connector_iter(connector, &conn_iter)
507 0 : DRM_ERROR("connector %s leaked!\n", connector->name);
508 0 : drm_connector_list_iter_end(&conn_iter);
509 : }
510 :
511 0 : list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
512 : head) {
513 0 : drm_property_destroy(dev, property);
514 : }
515 :
516 0 : list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
517 : head) {
518 0 : plane->funcs->destroy(plane);
519 : }
520 :
521 0 : list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
522 0 : crtc->funcs->destroy(crtc);
523 : }
524 :
525 0 : list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
526 : head_global) {
527 0 : 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 0 : WARN_ON(!list_empty(&dev->mode_config.fb_list));
539 0 : list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
540 0 : struct drm_printer p = drm_debug_printer("[leaked fb]");
541 :
542 0 : drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
543 0 : drm_framebuffer_print_info(&p, 1, fb);
544 0 : drm_framebuffer_free(&fb->base.refcount);
545 : }
546 :
547 0 : ida_destroy(&dev->mode_config.connector_ida);
548 0 : idr_destroy(&dev->mode_config.tile_idr);
549 0 : idr_destroy(&dev->mode_config.object_idr);
550 0 : drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
551 0 : }
552 : EXPORT_SYMBOL(drm_mode_config_cleanup);
553 :
554 : static u32 full_encoder_mask(struct drm_device *dev)
555 : {
556 : struct drm_encoder *encoder;
557 0 : u32 encoder_mask = 0;
558 :
559 0 : drm_for_each_encoder(encoder, dev)
560 0 : 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 : */
570 : static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
571 : {
572 0 : if (encoder->possible_clones == 0)
573 0 : encoder->possible_clones = drm_encoder_mask(encoder);
574 : }
575 :
576 0 : static void validate_encoder_possible_clones(struct drm_encoder *encoder)
577 : {
578 0 : struct drm_device *dev = encoder->dev;
579 : u32 encoder_mask = full_encoder_mask(dev);
580 : struct drm_encoder *other;
581 :
582 0 : drm_for_each_encoder(other, dev) {
583 0 : 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 0 : 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 0 : }
601 :
602 : static u32 full_crtc_mask(struct drm_device *dev)
603 : {
604 : struct drm_crtc *crtc;
605 0 : u32 crtc_mask = 0;
606 :
607 0 : drm_for_each_crtc(crtc, dev)
608 0 : crtc_mask |= drm_crtc_mask(crtc);
609 :
610 : return crtc_mask;
611 : }
612 :
613 0 : static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
614 : {
615 0 : u32 crtc_mask = full_crtc_mask(encoder->dev);
616 :
617 0 : 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 0 : }
624 :
625 0 : void drm_mode_config_validate(struct drm_device *dev)
626 : {
627 : struct drm_encoder *encoder;
628 : struct drm_crtc *crtc;
629 : struct drm_plane *plane;
630 0 : u32 primary_with_crtc = 0, cursor_with_crtc = 0;
631 0 : unsigned int num_primary = 0;
632 :
633 0 : if (!drm_core_check_feature(dev, DRIVER_MODESET))
634 : return;
635 :
636 0 : drm_for_each_encoder(encoder, dev)
637 0 : fixup_encoder_possible_clones(encoder);
638 :
639 0 : drm_for_each_encoder(encoder, dev) {
640 0 : validate_encoder_possible_clones(encoder);
641 0 : validate_encoder_possible_crtcs(encoder);
642 : }
643 :
644 0 : drm_for_each_crtc(crtc, dev) {
645 0 : WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
646 : crtc->base.id, crtc->name);
647 :
648 0 : WARN(crtc->cursor && crtc->funcs->cursor_set,
649 : "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
650 : crtc->base.id, crtc->name);
651 0 : WARN(crtc->cursor && crtc->funcs->cursor_set2,
652 : "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
653 : crtc->base.id, crtc->name);
654 0 : WARN(crtc->cursor && crtc->funcs->cursor_move,
655 : "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
656 : crtc->base.id, crtc->name);
657 :
658 0 : if (crtc->primary) {
659 0 : WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
660 : "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
661 : crtc->primary->base.id, crtc->primary->name,
662 : crtc->base.id, crtc->name);
663 0 : WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
664 : "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
665 : crtc->primary->base.id, crtc->primary->name);
666 0 : primary_with_crtc |= drm_plane_mask(crtc->primary);
667 : }
668 0 : if (crtc->cursor) {
669 0 : WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
670 : "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
671 : crtc->cursor->base.id, crtc->cursor->name,
672 : crtc->base.id, crtc->name);
673 0 : WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
674 : "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
675 : crtc->cursor->base.id, crtc->cursor->name);
676 0 : cursor_with_crtc |= drm_plane_mask(crtc->cursor);
677 : }
678 : }
679 :
680 0 : drm_for_each_plane(plane, dev) {
681 0 : if (plane->type == DRM_PLANE_TYPE_PRIMARY)
682 0 : num_primary++;
683 : }
684 :
685 0 : WARN(num_primary != dev->mode_config.num_crtc,
686 : "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
687 : num_primary, dev->mode_config.num_crtc);
688 : }
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