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 <drm/drm_auth.h>
24 : #include <drm/drm_connector.h>
25 : #include <drm/drm_edid.h>
26 : #include <drm/drm_encoder.h>
27 : #include <drm/drm_utils.h>
28 : #include <drm/drm_print.h>
29 : #include <drm/drm_drv.h>
30 : #include <drm/drm_file.h>
31 : #include <drm/drm_privacy_screen_consumer.h>
32 : #include <drm/drm_sysfs.h>
33 :
34 : #include <linux/uaccess.h>
35 :
36 : #include "drm_crtc_internal.h"
37 : #include "drm_internal.h"
38 :
39 : /**
40 : * DOC: overview
41 : *
42 : * In DRM connectors are the general abstraction for display sinks, and include
43 : * also fixed panels or anything else that can display pixels in some form. As
44 : * opposed to all other KMS objects representing hardware (like CRTC, encoder or
45 : * plane abstractions) connectors can be hotplugged and unplugged at runtime.
46 : * Hence they are reference-counted using drm_connector_get() and
47 : * drm_connector_put().
48 : *
49 : * KMS driver must create, initialize, register and attach at a &struct
50 : * drm_connector for each such sink. The instance is created as other KMS
51 : * objects and initialized by setting the following fields. The connector is
52 : * initialized with a call to drm_connector_init() with a pointer to the
53 : * &struct drm_connector_funcs and a connector type, and then exposed to
54 : * userspace with a call to drm_connector_register().
55 : *
56 : * Connectors must be attached to an encoder to be used. For devices that map
57 : * connectors to encoders 1:1, the connector should be attached at
58 : * initialization time with a call to drm_connector_attach_encoder(). The
59 : * driver must also set the &drm_connector.encoder field to point to the
60 : * attached encoder.
61 : *
62 : * For connectors which are not fixed (like built-in panels) the driver needs to
63 : * support hotplug notifications. The simplest way to do that is by using the
64 : * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
65 : * hardware support for hotplug interrupts. Connectors with hardware hotplug
66 : * support can instead use e.g. drm_helper_hpd_irq_event().
67 : */
68 :
69 : /*
70 : * Global connector list for drm_connector_find_by_fwnode().
71 : * Note drm_connector_[un]register() first take connector->lock and then
72 : * take the connector_list_lock.
73 : */
74 : static DEFINE_MUTEX(connector_list_lock);
75 : static LIST_HEAD(connector_list);
76 :
77 : struct drm_conn_prop_enum_list {
78 : int type;
79 : const char *name;
80 : struct ida ida;
81 : };
82 :
83 : /*
84 : * Connector and encoder types.
85 : */
86 : static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
87 : { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
88 : { DRM_MODE_CONNECTOR_VGA, "VGA" },
89 : { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
90 : { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
91 : { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
92 : { DRM_MODE_CONNECTOR_Composite, "Composite" },
93 : { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
94 : { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
95 : { DRM_MODE_CONNECTOR_Component, "Component" },
96 : { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
97 : { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
98 : { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
99 : { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
100 : { DRM_MODE_CONNECTOR_TV, "TV" },
101 : { DRM_MODE_CONNECTOR_eDP, "eDP" },
102 : { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
103 : { DRM_MODE_CONNECTOR_DSI, "DSI" },
104 : { DRM_MODE_CONNECTOR_DPI, "DPI" },
105 : { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" },
106 : { DRM_MODE_CONNECTOR_SPI, "SPI" },
107 : { DRM_MODE_CONNECTOR_USB, "USB" },
108 : };
109 :
110 1 : void drm_connector_ida_init(void)
111 : {
112 : int i;
113 :
114 22 : for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
115 42 : ida_init(&drm_connector_enum_list[i].ida);
116 1 : }
117 :
118 0 : void drm_connector_ida_destroy(void)
119 : {
120 : int i;
121 :
122 0 : for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
123 0 : ida_destroy(&drm_connector_enum_list[i].ida);
124 0 : }
125 :
126 : /**
127 : * drm_get_connector_type_name - return a string for connector type
128 : * @type: The connector type (DRM_MODE_CONNECTOR_*)
129 : *
130 : * Returns: the name of the connector type, or NULL if the type is not valid.
131 : */
132 0 : const char *drm_get_connector_type_name(unsigned int type)
133 : {
134 0 : if (type < ARRAY_SIZE(drm_connector_enum_list))
135 0 : return drm_connector_enum_list[type].name;
136 :
137 : return NULL;
138 : }
139 : EXPORT_SYMBOL(drm_get_connector_type_name);
140 :
141 : /**
142 : * drm_connector_get_cmdline_mode - reads the user's cmdline mode
143 : * @connector: connector to query
144 : *
145 : * The kernel supports per-connector configuration of its consoles through
146 : * use of the video= parameter. This function parses that option and
147 : * extracts the user's specified mode (or enable/disable status) for a
148 : * particular connector. This is typically only used during the early fbdev
149 : * setup.
150 : */
151 0 : static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
152 : {
153 0 : struct drm_cmdline_mode *mode = &connector->cmdline_mode;
154 0 : char *option = NULL;
155 :
156 0 : if (fb_get_options(connector->name, &option))
157 0 : return;
158 :
159 0 : if (!drm_mode_parse_command_line_for_connector(option,
160 : connector,
161 : mode))
162 : return;
163 :
164 0 : if (mode->force) {
165 0 : DRM_INFO("forcing %s connector %s\n", connector->name,
166 : drm_get_connector_force_name(mode->force));
167 0 : connector->force = mode->force;
168 : }
169 :
170 0 : if (mode->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) {
171 0 : DRM_INFO("cmdline forces connector %s panel_orientation to %d\n",
172 : connector->name, mode->panel_orientation);
173 0 : drm_connector_set_panel_orientation(connector,
174 : mode->panel_orientation);
175 : }
176 :
177 0 : DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n",
178 : connector->name, mode->name,
179 : mode->xres, mode->yres,
180 : mode->refresh_specified ? mode->refresh : 60,
181 : mode->rb ? " reduced blanking" : "",
182 : mode->margins ? " with margins" : "",
183 : mode->interlace ? " interlaced" : "");
184 : }
185 :
186 0 : static void drm_connector_free(struct kref *kref)
187 : {
188 0 : struct drm_connector *connector =
189 0 : container_of(kref, struct drm_connector, base.refcount);
190 0 : struct drm_device *dev = connector->dev;
191 :
192 0 : drm_mode_object_unregister(dev, &connector->base);
193 0 : connector->funcs->destroy(connector);
194 0 : }
195 :
196 0 : void drm_connector_free_work_fn(struct work_struct *work)
197 : {
198 : struct drm_connector *connector, *n;
199 0 : struct drm_device *dev =
200 0 : container_of(work, struct drm_device, mode_config.connector_free_work);
201 0 : struct drm_mode_config *config = &dev->mode_config;
202 : unsigned long flags;
203 : struct llist_node *freed;
204 :
205 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
206 0 : freed = llist_del_all(&config->connector_free_list);
207 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
208 :
209 0 : llist_for_each_entry_safe(connector, n, freed, free_node) {
210 0 : drm_mode_object_unregister(dev, &connector->base);
211 0 : connector->funcs->destroy(connector);
212 : }
213 0 : }
214 :
215 : /**
216 : * drm_connector_init - Init a preallocated connector
217 : * @dev: DRM device
218 : * @connector: the connector to init
219 : * @funcs: callbacks for this connector
220 : * @connector_type: user visible type of the connector
221 : *
222 : * Initialises a preallocated connector. Connectors should be
223 : * subclassed as part of driver connector objects.
224 : *
225 : * Returns:
226 : * Zero on success, error code on failure.
227 : */
228 0 : int drm_connector_init(struct drm_device *dev,
229 : struct drm_connector *connector,
230 : const struct drm_connector_funcs *funcs,
231 : int connector_type)
232 : {
233 0 : struct drm_mode_config *config = &dev->mode_config;
234 : int ret;
235 0 : struct ida *connector_ida =
236 : &drm_connector_enum_list[connector_type].ida;
237 :
238 0 : WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
239 : (!funcs->atomic_destroy_state ||
240 : !funcs->atomic_duplicate_state));
241 :
242 0 : ret = __drm_mode_object_add(dev, &connector->base,
243 : DRM_MODE_OBJECT_CONNECTOR,
244 : false, drm_connector_free);
245 0 : if (ret)
246 : return ret;
247 :
248 0 : connector->base.properties = &connector->properties;
249 0 : connector->dev = dev;
250 0 : connector->funcs = funcs;
251 :
252 : /* connector index is used with 32bit bitmasks */
253 0 : ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
254 0 : if (ret < 0) {
255 0 : DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
256 : drm_connector_enum_list[connector_type].name,
257 : ret);
258 0 : goto out_put;
259 : }
260 0 : connector->index = ret;
261 0 : ret = 0;
262 :
263 0 : connector->connector_type = connector_type;
264 0 : connector->connector_type_id =
265 0 : ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
266 0 : if (connector->connector_type_id < 0) {
267 : ret = connector->connector_type_id;
268 : goto out_put_id;
269 : }
270 0 : connector->name =
271 0 : kasprintf(GFP_KERNEL, "%s-%d",
272 : drm_connector_enum_list[connector_type].name,
273 : connector->connector_type_id);
274 0 : if (!connector->name) {
275 : ret = -ENOMEM;
276 : goto out_put_type_id;
277 : }
278 :
279 0 : INIT_LIST_HEAD(&connector->global_connector_list_entry);
280 0 : INIT_LIST_HEAD(&connector->probed_modes);
281 0 : INIT_LIST_HEAD(&connector->modes);
282 0 : mutex_init(&connector->mutex);
283 0 : connector->edid_blob_ptr = NULL;
284 0 : connector->epoch_counter = 0;
285 0 : connector->tile_blob_ptr = NULL;
286 0 : connector->status = connector_status_unknown;
287 0 : connector->display_info.panel_orientation =
288 : DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
289 :
290 0 : drm_connector_get_cmdline_mode(connector);
291 :
292 : /* We should add connectors at the end to avoid upsetting the connector
293 : * index too much.
294 : */
295 0 : spin_lock_irq(&config->connector_list_lock);
296 0 : list_add_tail(&connector->head, &config->connector_list);
297 0 : config->num_connector++;
298 0 : spin_unlock_irq(&config->connector_list_lock);
299 :
300 0 : if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL &&
301 0 : connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
302 : drm_connector_attach_edid_property(connector);
303 :
304 0 : drm_object_attach_property(&connector->base,
305 : config->dpms_property, 0);
306 :
307 0 : drm_object_attach_property(&connector->base,
308 : config->link_status_property,
309 : 0);
310 :
311 0 : drm_object_attach_property(&connector->base,
312 : config->non_desktop_property,
313 : 0);
314 0 : drm_object_attach_property(&connector->base,
315 : config->tile_property,
316 : 0);
317 :
318 0 : if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
319 0 : drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
320 : }
321 :
322 0 : connector->debugfs_entry = NULL;
323 : out_put_type_id:
324 0 : if (ret)
325 0 : ida_simple_remove(connector_ida, connector->connector_type_id);
326 : out_put_id:
327 0 : if (ret)
328 0 : ida_simple_remove(&config->connector_ida, connector->index);
329 : out_put:
330 0 : if (ret)
331 0 : drm_mode_object_unregister(dev, &connector->base);
332 :
333 : return ret;
334 : }
335 : EXPORT_SYMBOL(drm_connector_init);
336 :
337 : /**
338 : * drm_connector_init_with_ddc - Init a preallocated connector
339 : * @dev: DRM device
340 : * @connector: the connector to init
341 : * @funcs: callbacks for this connector
342 : * @connector_type: user visible type of the connector
343 : * @ddc: pointer to the associated ddc adapter
344 : *
345 : * Initialises a preallocated connector. Connectors should be
346 : * subclassed as part of driver connector objects.
347 : *
348 : * Ensures that the ddc field of the connector is correctly set.
349 : *
350 : * Returns:
351 : * Zero on success, error code on failure.
352 : */
353 0 : int drm_connector_init_with_ddc(struct drm_device *dev,
354 : struct drm_connector *connector,
355 : const struct drm_connector_funcs *funcs,
356 : int connector_type,
357 : struct i2c_adapter *ddc)
358 : {
359 : int ret;
360 :
361 0 : ret = drm_connector_init(dev, connector, funcs, connector_type);
362 0 : if (ret)
363 : return ret;
364 :
365 : /* provide ddc symlink in sysfs */
366 0 : connector->ddc = ddc;
367 :
368 0 : return ret;
369 : }
370 : EXPORT_SYMBOL(drm_connector_init_with_ddc);
371 :
372 : /**
373 : * drm_connector_attach_edid_property - attach edid property.
374 : * @connector: the connector
375 : *
376 : * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a
377 : * edid property attached by default. This function can be used to
378 : * explicitly enable the edid property in these cases.
379 : */
380 0 : void drm_connector_attach_edid_property(struct drm_connector *connector)
381 : {
382 0 : struct drm_mode_config *config = &connector->dev->mode_config;
383 :
384 0 : drm_object_attach_property(&connector->base,
385 : config->edid_property,
386 : 0);
387 0 : }
388 : EXPORT_SYMBOL(drm_connector_attach_edid_property);
389 :
390 : /**
391 : * drm_connector_attach_encoder - attach a connector to an encoder
392 : * @connector: connector to attach
393 : * @encoder: encoder to attach @connector to
394 : *
395 : * This function links up a connector to an encoder. Note that the routing
396 : * restrictions between encoders and crtcs are exposed to userspace through the
397 : * possible_clones and possible_crtcs bitmasks.
398 : *
399 : * Returns:
400 : * Zero on success, negative errno on failure.
401 : */
402 0 : int drm_connector_attach_encoder(struct drm_connector *connector,
403 : struct drm_encoder *encoder)
404 : {
405 : /*
406 : * In the past, drivers have attempted to model the static association
407 : * of connector to encoder in simple connector/encoder devices using a
408 : * direct assignment of connector->encoder = encoder. This connection
409 : * is a logical one and the responsibility of the core, so drivers are
410 : * expected not to mess with this.
411 : *
412 : * Note that the error return should've been enough here, but a large
413 : * majority of drivers ignores the return value, so add in a big WARN
414 : * to get people's attention.
415 : */
416 0 : if (WARN_ON(connector->encoder))
417 : return -EINVAL;
418 :
419 0 : connector->possible_encoders |= drm_encoder_mask(encoder);
420 :
421 0 : return 0;
422 : }
423 : EXPORT_SYMBOL(drm_connector_attach_encoder);
424 :
425 : /**
426 : * drm_connector_has_possible_encoder - check if the connector and encoder are
427 : * associated with each other
428 : * @connector: the connector
429 : * @encoder: the encoder
430 : *
431 : * Returns:
432 : * True if @encoder is one of the possible encoders for @connector.
433 : */
434 0 : bool drm_connector_has_possible_encoder(struct drm_connector *connector,
435 : struct drm_encoder *encoder)
436 : {
437 0 : return connector->possible_encoders & drm_encoder_mask(encoder);
438 : }
439 : EXPORT_SYMBOL(drm_connector_has_possible_encoder);
440 :
441 : static void drm_mode_remove(struct drm_connector *connector,
442 : struct drm_display_mode *mode)
443 : {
444 0 : list_del(&mode->head);
445 0 : drm_mode_destroy(connector->dev, mode);
446 : }
447 :
448 : /**
449 : * drm_connector_cleanup - cleans up an initialised connector
450 : * @connector: connector to cleanup
451 : *
452 : * Cleans up the connector but doesn't free the object.
453 : */
454 0 : void drm_connector_cleanup(struct drm_connector *connector)
455 : {
456 0 : struct drm_device *dev = connector->dev;
457 : struct drm_display_mode *mode, *t;
458 :
459 : /* The connector should have been removed from userspace long before
460 : * it is finally destroyed.
461 : */
462 0 : if (WARN_ON(connector->registration_state ==
463 : DRM_CONNECTOR_REGISTERED))
464 0 : drm_connector_unregister(connector);
465 :
466 0 : if (connector->privacy_screen) {
467 0 : drm_privacy_screen_put(connector->privacy_screen);
468 0 : connector->privacy_screen = NULL;
469 : }
470 :
471 0 : if (connector->tile_group) {
472 0 : drm_mode_put_tile_group(dev, connector->tile_group);
473 0 : connector->tile_group = NULL;
474 : }
475 :
476 0 : list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
477 0 : drm_mode_remove(connector, mode);
478 :
479 0 : list_for_each_entry_safe(mode, t, &connector->modes, head)
480 0 : drm_mode_remove(connector, mode);
481 :
482 0 : ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
483 : connector->connector_type_id);
484 :
485 0 : ida_simple_remove(&dev->mode_config.connector_ida,
486 : connector->index);
487 :
488 0 : kfree(connector->display_info.bus_formats);
489 0 : drm_mode_object_unregister(dev, &connector->base);
490 0 : kfree(connector->name);
491 0 : connector->name = NULL;
492 0 : fwnode_handle_put(connector->fwnode);
493 0 : connector->fwnode = NULL;
494 0 : spin_lock_irq(&dev->mode_config.connector_list_lock);
495 0 : list_del(&connector->head);
496 0 : dev->mode_config.num_connector--;
497 0 : spin_unlock_irq(&dev->mode_config.connector_list_lock);
498 :
499 0 : WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
500 0 : if (connector->state && connector->funcs->atomic_destroy_state)
501 0 : connector->funcs->atomic_destroy_state(connector,
502 : connector->state);
503 :
504 0 : mutex_destroy(&connector->mutex);
505 :
506 0 : memset(connector, 0, sizeof(*connector));
507 0 : }
508 : EXPORT_SYMBOL(drm_connector_cleanup);
509 :
510 : /**
511 : * drm_connector_register - register a connector
512 : * @connector: the connector to register
513 : *
514 : * Register userspace interfaces for a connector. Only call this for connectors
515 : * which can be hotplugged after drm_dev_register() has been called already,
516 : * e.g. DP MST connectors. All other connectors will be registered automatically
517 : * when calling drm_dev_register().
518 : *
519 : * Returns:
520 : * Zero on success, error code on failure.
521 : */
522 0 : int drm_connector_register(struct drm_connector *connector)
523 : {
524 0 : int ret = 0;
525 :
526 0 : if (!connector->dev->registered)
527 : return 0;
528 :
529 0 : mutex_lock(&connector->mutex);
530 0 : if (connector->registration_state != DRM_CONNECTOR_INITIALIZING)
531 : goto unlock;
532 :
533 0 : ret = drm_sysfs_connector_add(connector);
534 0 : if (ret)
535 : goto unlock;
536 :
537 0 : drm_debugfs_connector_add(connector);
538 :
539 0 : if (connector->funcs->late_register) {
540 0 : ret = connector->funcs->late_register(connector);
541 0 : if (ret)
542 : goto err_debugfs;
543 : }
544 :
545 0 : drm_mode_object_register(connector->dev, &connector->base);
546 :
547 0 : connector->registration_state = DRM_CONNECTOR_REGISTERED;
548 :
549 : /* Let userspace know we have a new connector */
550 0 : drm_sysfs_connector_hotplug_event(connector);
551 :
552 0 : if (connector->privacy_screen)
553 : drm_privacy_screen_register_notifier(connector->privacy_screen,
554 : &connector->privacy_screen_notifier);
555 :
556 0 : mutex_lock(&connector_list_lock);
557 0 : list_add_tail(&connector->global_connector_list_entry, &connector_list);
558 0 : mutex_unlock(&connector_list_lock);
559 0 : goto unlock;
560 :
561 : err_debugfs:
562 0 : drm_debugfs_connector_remove(connector);
563 0 : drm_sysfs_connector_remove(connector);
564 : unlock:
565 0 : mutex_unlock(&connector->mutex);
566 0 : return ret;
567 : }
568 : EXPORT_SYMBOL(drm_connector_register);
569 :
570 : /**
571 : * drm_connector_unregister - unregister a connector
572 : * @connector: the connector to unregister
573 : *
574 : * Unregister userspace interfaces for a connector. Only call this for
575 : * connectors which have registered explicitly by calling drm_dev_register(),
576 : * since connectors are unregistered automatically when drm_dev_unregister() is
577 : * called.
578 : */
579 0 : void drm_connector_unregister(struct drm_connector *connector)
580 : {
581 0 : mutex_lock(&connector->mutex);
582 0 : if (connector->registration_state != DRM_CONNECTOR_REGISTERED) {
583 0 : mutex_unlock(&connector->mutex);
584 0 : return;
585 : }
586 :
587 0 : mutex_lock(&connector_list_lock);
588 0 : list_del_init(&connector->global_connector_list_entry);
589 0 : mutex_unlock(&connector_list_lock);
590 :
591 0 : if (connector->privacy_screen)
592 : drm_privacy_screen_unregister_notifier(
593 : connector->privacy_screen,
594 : &connector->privacy_screen_notifier);
595 :
596 0 : if (connector->funcs->early_unregister)
597 0 : connector->funcs->early_unregister(connector);
598 :
599 0 : drm_sysfs_connector_remove(connector);
600 0 : drm_debugfs_connector_remove(connector);
601 :
602 0 : connector->registration_state = DRM_CONNECTOR_UNREGISTERED;
603 0 : mutex_unlock(&connector->mutex);
604 : }
605 : EXPORT_SYMBOL(drm_connector_unregister);
606 :
607 0 : void drm_connector_unregister_all(struct drm_device *dev)
608 : {
609 : struct drm_connector *connector;
610 : struct drm_connector_list_iter conn_iter;
611 :
612 : drm_connector_list_iter_begin(dev, &conn_iter);
613 0 : drm_for_each_connector_iter(connector, &conn_iter)
614 0 : drm_connector_unregister(connector);
615 0 : drm_connector_list_iter_end(&conn_iter);
616 0 : }
617 :
618 0 : int drm_connector_register_all(struct drm_device *dev)
619 : {
620 : struct drm_connector *connector;
621 : struct drm_connector_list_iter conn_iter;
622 0 : int ret = 0;
623 :
624 : drm_connector_list_iter_begin(dev, &conn_iter);
625 0 : drm_for_each_connector_iter(connector, &conn_iter) {
626 0 : ret = drm_connector_register(connector);
627 0 : if (ret)
628 : break;
629 : }
630 0 : drm_connector_list_iter_end(&conn_iter);
631 :
632 0 : if (ret)
633 0 : drm_connector_unregister_all(dev);
634 0 : return ret;
635 : }
636 :
637 : /**
638 : * drm_get_connector_status_name - return a string for connector status
639 : * @status: connector status to compute name of
640 : *
641 : * In contrast to the other drm_get_*_name functions this one here returns a
642 : * const pointer and hence is threadsafe.
643 : *
644 : * Returns: connector status string
645 : */
646 0 : const char *drm_get_connector_status_name(enum drm_connector_status status)
647 : {
648 0 : if (status == connector_status_connected)
649 : return "connected";
650 0 : else if (status == connector_status_disconnected)
651 : return "disconnected";
652 : else
653 0 : return "unknown";
654 : }
655 : EXPORT_SYMBOL(drm_get_connector_status_name);
656 :
657 : /**
658 : * drm_get_connector_force_name - return a string for connector force
659 : * @force: connector force to get name of
660 : *
661 : * Returns: const pointer to name.
662 : */
663 0 : const char *drm_get_connector_force_name(enum drm_connector_force force)
664 : {
665 : switch (force) {
666 : case DRM_FORCE_UNSPECIFIED:
667 : return "unspecified";
668 : case DRM_FORCE_OFF:
669 : return "off";
670 : case DRM_FORCE_ON:
671 : return "on";
672 : case DRM_FORCE_ON_DIGITAL:
673 : return "digital";
674 : default:
675 : return "unknown";
676 : }
677 : }
678 :
679 : #ifdef CONFIG_LOCKDEP
680 : static struct lockdep_map connector_list_iter_dep_map = {
681 : .name = "drm_connector_list_iter"
682 : };
683 : #endif
684 :
685 : /**
686 : * drm_connector_list_iter_begin - initialize a connector_list iterator
687 : * @dev: DRM device
688 : * @iter: connector_list iterator
689 : *
690 : * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
691 : * must always be cleaned up again by calling drm_connector_list_iter_end().
692 : * Iteration itself happens using drm_connector_list_iter_next() or
693 : * drm_for_each_connector_iter().
694 : */
695 0 : void drm_connector_list_iter_begin(struct drm_device *dev,
696 : struct drm_connector_list_iter *iter)
697 : {
698 0 : iter->dev = dev;
699 0 : iter->conn = NULL;
700 : lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
701 0 : }
702 : EXPORT_SYMBOL(drm_connector_list_iter_begin);
703 :
704 : /*
705 : * Extra-safe connector put function that works in any context. Should only be
706 : * used from the connector_iter functions, where we never really expect to
707 : * actually release the connector when dropping our final reference.
708 : */
709 : static void
710 0 : __drm_connector_put_safe(struct drm_connector *conn)
711 : {
712 0 : struct drm_mode_config *config = &conn->dev->mode_config;
713 :
714 : lockdep_assert_held(&config->connector_list_lock);
715 :
716 0 : if (!refcount_dec_and_test(&conn->base.refcount.refcount))
717 : return;
718 :
719 0 : llist_add(&conn->free_node, &config->connector_free_list);
720 0 : schedule_work(&config->connector_free_work);
721 : }
722 :
723 : /**
724 : * drm_connector_list_iter_next - return next connector
725 : * @iter: connector_list iterator
726 : *
727 : * Returns: the next connector for @iter, or NULL when the list walk has
728 : * completed.
729 : */
730 : struct drm_connector *
731 0 : drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
732 : {
733 0 : struct drm_connector *old_conn = iter->conn;
734 0 : struct drm_mode_config *config = &iter->dev->mode_config;
735 : struct list_head *lhead;
736 : unsigned long flags;
737 :
738 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
739 0 : lhead = old_conn ? &old_conn->head : &config->connector_list;
740 :
741 : do {
742 0 : if (lhead->next == &config->connector_list) {
743 0 : iter->conn = NULL;
744 0 : break;
745 : }
746 :
747 0 : lhead = lhead->next;
748 0 : iter->conn = list_entry(lhead, struct drm_connector, head);
749 :
750 : /* loop until it's not a zombie connector */
751 0 : } while (!kref_get_unless_zero(&iter->conn->base.refcount));
752 :
753 0 : if (old_conn)
754 0 : __drm_connector_put_safe(old_conn);
755 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
756 :
757 0 : return iter->conn;
758 : }
759 : EXPORT_SYMBOL(drm_connector_list_iter_next);
760 :
761 : /**
762 : * drm_connector_list_iter_end - tear down a connector_list iterator
763 : * @iter: connector_list iterator
764 : *
765 : * Tears down @iter and releases any resources (like &drm_connector references)
766 : * acquired while walking the list. This must always be called, both when the
767 : * iteration completes fully or when it was aborted without walking the entire
768 : * list.
769 : */
770 0 : void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
771 : {
772 0 : struct drm_mode_config *config = &iter->dev->mode_config;
773 : unsigned long flags;
774 :
775 0 : iter->dev = NULL;
776 0 : if (iter->conn) {
777 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
778 0 : __drm_connector_put_safe(iter->conn);
779 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
780 : }
781 : lock_release(&connector_list_iter_dep_map, _RET_IP_);
782 0 : }
783 : EXPORT_SYMBOL(drm_connector_list_iter_end);
784 :
785 : static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
786 : { SubPixelUnknown, "Unknown" },
787 : { SubPixelHorizontalRGB, "Horizontal RGB" },
788 : { SubPixelHorizontalBGR, "Horizontal BGR" },
789 : { SubPixelVerticalRGB, "Vertical RGB" },
790 : { SubPixelVerticalBGR, "Vertical BGR" },
791 : { SubPixelNone, "None" },
792 : };
793 :
794 : /**
795 : * drm_get_subpixel_order_name - return a string for a given subpixel enum
796 : * @order: enum of subpixel_order
797 : *
798 : * Note you could abuse this and return something out of bounds, but that
799 : * would be a caller error. No unscrubbed user data should make it here.
800 : *
801 : * Returns: string describing an enumerated subpixel property
802 : */
803 0 : const char *drm_get_subpixel_order_name(enum subpixel_order order)
804 : {
805 0 : return drm_subpixel_enum_list[order].name;
806 : }
807 : EXPORT_SYMBOL(drm_get_subpixel_order_name);
808 :
809 : static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
810 : { DRM_MODE_DPMS_ON, "On" },
811 : { DRM_MODE_DPMS_STANDBY, "Standby" },
812 : { DRM_MODE_DPMS_SUSPEND, "Suspend" },
813 : { DRM_MODE_DPMS_OFF, "Off" }
814 : };
815 0 : DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
816 :
817 : static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
818 : { DRM_MODE_LINK_STATUS_GOOD, "Good" },
819 : { DRM_MODE_LINK_STATUS_BAD, "Bad" },
820 : };
821 :
822 : /**
823 : * drm_display_info_set_bus_formats - set the supported bus formats
824 : * @info: display info to store bus formats in
825 : * @formats: array containing the supported bus formats
826 : * @num_formats: the number of entries in the fmts array
827 : *
828 : * Store the supported bus formats in display info structure.
829 : * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
830 : * a full list of available formats.
831 : *
832 : * Returns:
833 : * 0 on success or a negative error code on failure.
834 : */
835 0 : int drm_display_info_set_bus_formats(struct drm_display_info *info,
836 : const u32 *formats,
837 : unsigned int num_formats)
838 : {
839 0 : u32 *fmts = NULL;
840 :
841 0 : if (!formats && num_formats)
842 : return -EINVAL;
843 :
844 0 : if (formats && num_formats) {
845 0 : fmts = kmemdup(formats, sizeof(*formats) * num_formats,
846 : GFP_KERNEL);
847 0 : if (!fmts)
848 : return -ENOMEM;
849 : }
850 :
851 0 : kfree(info->bus_formats);
852 0 : info->bus_formats = fmts;
853 0 : info->num_bus_formats = num_formats;
854 :
855 0 : return 0;
856 : }
857 : EXPORT_SYMBOL(drm_display_info_set_bus_formats);
858 :
859 : /* Optional connector properties. */
860 : static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
861 : { DRM_MODE_SCALE_NONE, "None" },
862 : { DRM_MODE_SCALE_FULLSCREEN, "Full" },
863 : { DRM_MODE_SCALE_CENTER, "Center" },
864 : { DRM_MODE_SCALE_ASPECT, "Full aspect" },
865 : };
866 :
867 : static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
868 : { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
869 : { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
870 : { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
871 : };
872 :
873 : static const struct drm_prop_enum_list drm_content_type_enum_list[] = {
874 : { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" },
875 : { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" },
876 : { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" },
877 : { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" },
878 : { DRM_MODE_CONTENT_TYPE_GAME, "Game" },
879 : };
880 :
881 : static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
882 : { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
883 : { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
884 : { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
885 : { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
886 : };
887 :
888 : static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
889 : { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
890 : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
891 : { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
892 : };
893 0 : DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
894 :
895 : static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
896 : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
897 : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
898 : { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
899 : };
900 0 : DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
901 : drm_dvi_i_subconnector_enum_list)
902 :
903 : static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
904 : { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
905 : { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
906 : { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
907 : { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
908 : { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
909 : };
910 0 : DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
911 :
912 : static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
913 : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
914 : { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
915 : { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
916 : { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
917 : { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
918 : };
919 0 : DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
920 : drm_tv_subconnector_enum_list)
921 :
922 : static const struct drm_prop_enum_list drm_dp_subconnector_enum_list[] = {
923 : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
924 : { DRM_MODE_SUBCONNECTOR_VGA, "VGA" }, /* DP */
925 : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DP */
926 : { DRM_MODE_SUBCONNECTOR_HDMIA, "HDMI" }, /* DP */
927 : { DRM_MODE_SUBCONNECTOR_DisplayPort, "DP" }, /* DP */
928 : { DRM_MODE_SUBCONNECTOR_Wireless, "Wireless" }, /* DP */
929 : { DRM_MODE_SUBCONNECTOR_Native, "Native" }, /* DP */
930 : };
931 :
932 0 : DRM_ENUM_NAME_FN(drm_get_dp_subconnector_name,
933 : drm_dp_subconnector_enum_list)
934 :
935 : static const struct drm_prop_enum_list hdmi_colorspaces[] = {
936 : /* For Default case, driver will set the colorspace */
937 : { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
938 : /* Standard Definition Colorimetry based on CEA 861 */
939 : { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" },
940 : { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
941 : /* Standard Definition Colorimetry based on IEC 61966-2-4 */
942 : { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
943 : /* High Definition Colorimetry based on IEC 61966-2-4 */
944 : { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
945 : /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
946 : { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
947 : /* Colorimetry based on IEC 61966-2-5 [33] */
948 : { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
949 : /* Colorimetry based on IEC 61966-2-5 */
950 : { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
951 : /* Colorimetry based on ITU-R BT.2020 */
952 : { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
953 : /* Colorimetry based on ITU-R BT.2020 */
954 : { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
955 : /* Colorimetry based on ITU-R BT.2020 */
956 : { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
957 : /* Added as part of Additional Colorimetry Extension in 861.G */
958 : { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
959 : { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" },
960 : };
961 :
962 : /*
963 : * As per DP 1.4a spec, 2.2.5.7.5 VSC SDP Payload for Pixel Encoding/Colorimetry
964 : * Format Table 2-120
965 : */
966 : static const struct drm_prop_enum_list dp_colorspaces[] = {
967 : /* For Default case, driver will set the colorspace */
968 : { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
969 : { DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED, "RGB_Wide_Gamut_Fixed_Point" },
970 : /* Colorimetry based on scRGB (IEC 61966-2-2) */
971 : { DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT, "RGB_Wide_Gamut_Floating_Point" },
972 : /* Colorimetry based on IEC 61966-2-5 */
973 : { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
974 : /* Colorimetry based on SMPTE RP 431-2 */
975 : { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
976 : /* Colorimetry based on ITU-R BT.2020 */
977 : { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
978 : { DRM_MODE_COLORIMETRY_BT601_YCC, "BT601_YCC" },
979 : { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
980 : /* Standard Definition Colorimetry based on IEC 61966-2-4 */
981 : { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
982 : /* High Definition Colorimetry based on IEC 61966-2-4 */
983 : { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
984 : /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
985 : { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
986 : /* Colorimetry based on IEC 61966-2-5 [33] */
987 : { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
988 : /* Colorimetry based on ITU-R BT.2020 */
989 : { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
990 : /* Colorimetry based on ITU-R BT.2020 */
991 : { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
992 : };
993 :
994 : /**
995 : * DOC: standard connector properties
996 : *
997 : * DRM connectors have a few standardized properties:
998 : *
999 : * EDID:
1000 : * Blob property which contains the current EDID read from the sink. This
1001 : * is useful to parse sink identification information like vendor, model
1002 : * and serial. Drivers should update this property by calling
1003 : * drm_connector_update_edid_property(), usually after having parsed
1004 : * the EDID using drm_add_edid_modes(). Userspace cannot change this
1005 : * property.
1006 : *
1007 : * User-space should not parse the EDID to obtain information exposed via
1008 : * other KMS properties (because the kernel might apply limits, quirks or
1009 : * fixups to the EDID). For instance, user-space should not try to parse
1010 : * mode lists from the EDID.
1011 : * DPMS:
1012 : * Legacy property for setting the power state of the connector. For atomic
1013 : * drivers this is only provided for backwards compatibility with existing
1014 : * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
1015 : * connector is linked to. Drivers should never set this property directly,
1016 : * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
1017 : * callback. For atomic drivers the remapping to the "ACTIVE" property is
1018 : * implemented in the DRM core.
1019 : *
1020 : * Note that this property cannot be set through the MODE_ATOMIC ioctl,
1021 : * userspace must use "ACTIVE" on the CRTC instead.
1022 : *
1023 : * WARNING:
1024 : *
1025 : * For userspace also running on legacy drivers the "DPMS" semantics are a
1026 : * lot more complicated. First, userspace cannot rely on the "DPMS" value
1027 : * returned by the GETCONNECTOR actually reflecting reality, because many
1028 : * drivers fail to update it. For atomic drivers this is taken care of in
1029 : * drm_atomic_helper_update_legacy_modeset_state().
1030 : *
1031 : * The second issue is that the DPMS state is only well-defined when the
1032 : * connector is connected to a CRTC. In atomic the DRM core enforces that
1033 : * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
1034 : *
1035 : * Finally, when enabling an output using the legacy SETCONFIG ioctl then
1036 : * "DPMS" is forced to ON. But see above, that might not be reflected in
1037 : * the software value on legacy drivers.
1038 : *
1039 : * Summarizing: Only set "DPMS" when the connector is known to be enabled,
1040 : * assume that a successful SETCONFIG call also sets "DPMS" to on, and
1041 : * never read back the value of "DPMS" because it can be incorrect.
1042 : * PATH:
1043 : * Connector path property to identify how this sink is physically
1044 : * connected. Used by DP MST. This should be set by calling
1045 : * drm_connector_set_path_property(), in the case of DP MST with the
1046 : * path property the MST manager created. Userspace cannot change this
1047 : * property.
1048 : * TILE:
1049 : * Connector tile group property to indicate how a set of DRM connector
1050 : * compose together into one logical screen. This is used by both high-res
1051 : * external screens (often only using a single cable, but exposing multiple
1052 : * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
1053 : * are not gen-locked. Note that for tiled panels which are genlocked, like
1054 : * dual-link LVDS or dual-link DSI, the driver should try to not expose the
1055 : * tiling and virtualise both &drm_crtc and &drm_plane if needed. Drivers
1056 : * should update this value using drm_connector_set_tile_property().
1057 : * Userspace cannot change this property.
1058 : * link-status:
1059 : * Connector link-status property to indicate the status of link. The
1060 : * default value of link-status is "GOOD". If something fails during or
1061 : * after modeset, the kernel driver may set this to "BAD" and issue a
1062 : * hotplug uevent. Drivers should update this value using
1063 : * drm_connector_set_link_status_property().
1064 : *
1065 : * When user-space receives the hotplug uevent and detects a "BAD"
1066 : * link-status, the sink doesn't receive pixels anymore (e.g. the screen
1067 : * becomes completely black). The list of available modes may have
1068 : * changed. User-space is expected to pick a new mode if the current one
1069 : * has disappeared and perform a new modeset with link-status set to
1070 : * "GOOD" to re-enable the connector.
1071 : *
1072 : * If multiple connectors share the same CRTC and one of them gets a "BAD"
1073 : * link-status, the other are unaffected (ie. the sinks still continue to
1074 : * receive pixels).
1075 : *
1076 : * When user-space performs an atomic commit on a connector with a "BAD"
1077 : * link-status without resetting the property to "GOOD", the sink may
1078 : * still not receive pixels. When user-space performs an atomic commit
1079 : * which resets the link-status property to "GOOD" without the
1080 : * ALLOW_MODESET flag set, it might fail because a modeset is required.
1081 : *
1082 : * User-space can only change link-status to "GOOD", changing it to "BAD"
1083 : * is a no-op.
1084 : *
1085 : * For backwards compatibility with non-atomic userspace the kernel
1086 : * tries to automatically set the link-status back to "GOOD" in the
1087 : * SETCRTC IOCTL. This might fail if the mode is no longer valid, similar
1088 : * to how it might fail if a different screen has been connected in the
1089 : * interim.
1090 : * non_desktop:
1091 : * Indicates the output should be ignored for purposes of displaying a
1092 : * standard desktop environment or console. This is most likely because
1093 : * the output device is not rectilinear.
1094 : * Content Protection:
1095 : * This property is used by userspace to request the kernel protect future
1096 : * content communicated over the link. When requested, kernel will apply
1097 : * the appropriate means of protection (most often HDCP), and use the
1098 : * property to tell userspace the protection is active.
1099 : *
1100 : * Drivers can set this up by calling
1101 : * drm_connector_attach_content_protection_property() on initialization.
1102 : *
1103 : * The value of this property can be one of the following:
1104 : *
1105 : * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
1106 : * The link is not protected, content is transmitted in the clear.
1107 : * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
1108 : * Userspace has requested content protection, but the link is not
1109 : * currently protected. When in this state, kernel should enable
1110 : * Content Protection as soon as possible.
1111 : * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
1112 : * Userspace has requested content protection, and the link is
1113 : * protected. Only the driver can set the property to this value.
1114 : * If userspace attempts to set to ENABLED, kernel will return
1115 : * -EINVAL.
1116 : *
1117 : * A few guidelines:
1118 : *
1119 : * - DESIRED state should be preserved until userspace de-asserts it by
1120 : * setting the property to UNDESIRED. This means ENABLED should only
1121 : * transition to UNDESIRED when the user explicitly requests it.
1122 : * - If the state is DESIRED, kernel should attempt to re-authenticate the
1123 : * link whenever possible. This includes across disable/enable, dpms,
1124 : * hotplug, downstream device changes, link status failures, etc..
1125 : * - Kernel sends uevent with the connector id and property id through
1126 : * @drm_hdcp_update_content_protection, upon below kernel triggered
1127 : * scenarios:
1128 : *
1129 : * - DESIRED -> ENABLED (authentication success)
1130 : * - ENABLED -> DESIRED (termination of authentication)
1131 : * - Please note no uevents for userspace triggered property state changes,
1132 : * which can't fail such as
1133 : *
1134 : * - DESIRED/ENABLED -> UNDESIRED
1135 : * - UNDESIRED -> DESIRED
1136 : * - Userspace is responsible for polling the property or listen to uevents
1137 : * to determine when the value transitions from ENABLED to DESIRED.
1138 : * This signifies the link is no longer protected and userspace should
1139 : * take appropriate action (whatever that might be).
1140 : *
1141 : * HDCP Content Type:
1142 : * This Enum property is used by the userspace to declare the content type
1143 : * of the display stream, to kernel. Here display stream stands for any
1144 : * display content that userspace intended to display through HDCP
1145 : * encryption.
1146 : *
1147 : * Content Type of a stream is decided by the owner of the stream, as
1148 : * "HDCP Type0" or "HDCP Type1".
1149 : *
1150 : * The value of the property can be one of the below:
1151 : * - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0
1152 : * - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1
1153 : *
1154 : * When kernel starts the HDCP authentication (see "Content Protection"
1155 : * for details), it uses the content type in "HDCP Content Type"
1156 : * for performing the HDCP authentication with the display sink.
1157 : *
1158 : * Please note in HDCP spec versions, a link can be authenticated with
1159 : * HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be
1160 : * authenticated with HDCP1.4 only for Content Type 0(though it is implicit
1161 : * in nature. As there is no reference for Content Type in HDCP1.4).
1162 : *
1163 : * HDCP2.2 authentication protocol itself takes the "Content Type" as a
1164 : * parameter, which is a input for the DP HDCP2.2 encryption algo.
1165 : *
1166 : * In case of Type 0 content protection request, kernel driver can choose
1167 : * either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for
1168 : * "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send
1169 : * that content to a HDCP 1.4 authenticated HDCP sink (Type0 link).
1170 : * But if the content is classified as "HDCP Type 1", above mentioned
1171 : * HDCP 2.2 repeater wont send the content to the HDCP sink as it can't
1172 : * authenticate the HDCP1.4 capable sink for "HDCP Type 1".
1173 : *
1174 : * Please note userspace can be ignorant of the HDCP versions used by the
1175 : * kernel driver to achieve the "HDCP Content Type".
1176 : *
1177 : * At current scenario, classifying a content as Type 1 ensures that the
1178 : * content will be displayed only through the HDCP2.2 encrypted link.
1179 : *
1180 : * Note that the HDCP Content Type property is introduced at HDCP 2.2, and
1181 : * defaults to type 0. It is only exposed by drivers supporting HDCP 2.2
1182 : * (hence supporting Type 0 and Type 1). Based on how next versions of
1183 : * HDCP specs are defined content Type could be used for higher versions
1184 : * too.
1185 : *
1186 : * If content type is changed when "Content Protection" is not UNDESIRED,
1187 : * then kernel will disable the HDCP and re-enable with new type in the
1188 : * same atomic commit. And when "Content Protection" is ENABLED, it means
1189 : * that link is HDCP authenticated and encrypted, for the transmission of
1190 : * the Type of stream mentioned at "HDCP Content Type".
1191 : *
1192 : * HDR_OUTPUT_METADATA:
1193 : * Connector property to enable userspace to send HDR Metadata to
1194 : * driver. This metadata is based on the composition and blending
1195 : * policies decided by user, taking into account the hardware and
1196 : * sink capabilities. The driver gets this metadata and creates a
1197 : * Dynamic Range and Mastering Infoframe (DRM) in case of HDMI,
1198 : * SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then
1199 : * sent to sink. This notifies the sink of the upcoming frame's Color
1200 : * Encoding and Luminance parameters.
1201 : *
1202 : * Userspace first need to detect the HDR capabilities of sink by
1203 : * reading and parsing the EDID. Details of HDR metadata for HDMI
1204 : * are added in CTA 861.G spec. For DP , its defined in VESA DP
1205 : * Standard v1.4. It needs to then get the metadata information
1206 : * of the video/game/app content which are encoded in HDR (basically
1207 : * using HDR transfer functions). With this information it needs to
1208 : * decide on a blending policy and compose the relevant
1209 : * layers/overlays into a common format. Once this blending is done,
1210 : * userspace will be aware of the metadata of the composed frame to
1211 : * be send to sink. It then uses this property to communicate this
1212 : * metadata to driver which then make a Infoframe packet and sends
1213 : * to sink based on the type of encoder connected.
1214 : *
1215 : * Userspace will be responsible to do Tone mapping operation in case:
1216 : * - Some layers are HDR and others are SDR
1217 : * - HDR layers luminance is not same as sink
1218 : *
1219 : * It will even need to do colorspace conversion and get all layers
1220 : * to one common colorspace for blending. It can use either GL, Media
1221 : * or display engine to get this done based on the capabilities of the
1222 : * associated hardware.
1223 : *
1224 : * Driver expects metadata to be put in &struct hdr_output_metadata
1225 : * structure from userspace. This is received as blob and stored in
1226 : * &drm_connector_state.hdr_output_metadata. It parses EDID and saves the
1227 : * sink metadata in &struct hdr_sink_metadata, as
1228 : * &drm_connector.hdr_sink_metadata. Driver uses
1229 : * drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata,
1230 : * hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of
1231 : * HDMI encoder.
1232 : *
1233 : * max bpc:
1234 : * This range property is used by userspace to limit the bit depth. When
1235 : * used the driver would limit the bpc in accordance with the valid range
1236 : * supported by the hardware and sink. Drivers to use the function
1237 : * drm_connector_attach_max_bpc_property() to create and attach the
1238 : * property to the connector during initialization.
1239 : *
1240 : * Connectors also have one standardized atomic property:
1241 : *
1242 : * CRTC_ID:
1243 : * Mode object ID of the &drm_crtc this connector should be connected to.
1244 : *
1245 : * Connectors for LCD panels may also have one standardized property:
1246 : *
1247 : * panel orientation:
1248 : * On some devices the LCD panel is mounted in the casing in such a way
1249 : * that the up/top side of the panel does not match with the top side of
1250 : * the device. Userspace can use this property to check for this.
1251 : * Note that input coordinates from touchscreens (input devices with
1252 : * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
1253 : * coordinates, so if userspace rotates the picture to adjust for
1254 : * the orientation it must also apply the same transformation to the
1255 : * touchscreen input coordinates. This property is initialized by calling
1256 : * drm_connector_set_panel_orientation() or
1257 : * drm_connector_set_panel_orientation_with_quirk()
1258 : *
1259 : * scaling mode:
1260 : * This property defines how a non-native mode is upscaled to the native
1261 : * mode of an LCD panel:
1262 : *
1263 : * None:
1264 : * No upscaling happens, scaling is left to the panel. Not all
1265 : * drivers expose this mode.
1266 : * Full:
1267 : * The output is upscaled to the full resolution of the panel,
1268 : * ignoring the aspect ratio.
1269 : * Center:
1270 : * No upscaling happens, the output is centered within the native
1271 : * resolution the panel.
1272 : * Full aspect:
1273 : * The output is upscaled to maximize either the width or height
1274 : * while retaining the aspect ratio.
1275 : *
1276 : * This property should be set up by calling
1277 : * drm_connector_attach_scaling_mode_property(). Note that drivers
1278 : * can also expose this property to external outputs, in which case they
1279 : * must support "None", which should be the default (since external screens
1280 : * have a built-in scaler).
1281 : *
1282 : * subconnector:
1283 : * This property is used by DVI-I, TVout and DisplayPort to indicate different
1284 : * connector subtypes. Enum values more or less match with those from main
1285 : * connector types.
1286 : * For DVI-I and TVout there is also a matching property "select subconnector"
1287 : * allowing to switch between signal types.
1288 : * DP subconnector corresponds to a downstream port.
1289 : *
1290 : * privacy-screen sw-state, privacy-screen hw-state:
1291 : * These 2 optional properties can be used to query the state of the
1292 : * electronic privacy screen that is available on some displays; and in
1293 : * some cases also control the state. If a driver implements these
1294 : * properties then both properties must be present.
1295 : *
1296 : * "privacy-screen hw-state" is read-only and reflects the actual state
1297 : * of the privacy-screen, possible values: "Enabled", "Disabled,
1298 : * "Enabled-locked", "Disabled-locked". The locked states indicate
1299 : * that the state cannot be changed through the DRM API. E.g. there
1300 : * might be devices where the firmware-setup options, or a hardware
1301 : * slider-switch, offer always on / off modes.
1302 : *
1303 : * "privacy-screen sw-state" can be set to change the privacy-screen state
1304 : * when not locked. In this case the driver must update the hw-state
1305 : * property to reflect the new state on completion of the commit of the
1306 : * sw-state property. Setting the sw-state property when the hw-state is
1307 : * locked must be interpreted by the driver as a request to change the
1308 : * state to the set state when the hw-state becomes unlocked. E.g. if
1309 : * "privacy-screen hw-state" is "Enabled-locked" and the sw-state
1310 : * gets set to "Disabled" followed by the user unlocking the state by
1311 : * changing the slider-switch position, then the driver must set the
1312 : * state to "Disabled" upon receiving the unlock event.
1313 : *
1314 : * In some cases the privacy-screen's actual state might change outside of
1315 : * control of the DRM code. E.g. there might be a firmware handled hotkey
1316 : * which toggles the actual state, or the actual state might be changed
1317 : * through another userspace API such as writing /proc/acpi/ibm/lcdshadow.
1318 : * In this case the driver must update both the hw-state and the sw-state
1319 : * to reflect the new value, overwriting any pending state requests in the
1320 : * sw-state. Any pending sw-state requests are thus discarded.
1321 : *
1322 : * Note that the ability for the state to change outside of control of
1323 : * the DRM master process means that userspace must not cache the value
1324 : * of the sw-state. Caching the sw-state value and including it in later
1325 : * atomic commits may lead to overriding a state change done through e.g.
1326 : * a firmware handled hotkey. Therefor userspace must not include the
1327 : * privacy-screen sw-state in an atomic commit unless it wants to change
1328 : * its value.
1329 : */
1330 :
1331 0 : int drm_connector_create_standard_properties(struct drm_device *dev)
1332 : {
1333 : struct drm_property *prop;
1334 :
1335 0 : prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1336 : DRM_MODE_PROP_IMMUTABLE,
1337 : "EDID", 0);
1338 0 : if (!prop)
1339 : return -ENOMEM;
1340 0 : dev->mode_config.edid_property = prop;
1341 :
1342 0 : prop = drm_property_create_enum(dev, 0,
1343 : "DPMS", drm_dpms_enum_list,
1344 : ARRAY_SIZE(drm_dpms_enum_list));
1345 0 : if (!prop)
1346 : return -ENOMEM;
1347 0 : dev->mode_config.dpms_property = prop;
1348 :
1349 0 : prop = drm_property_create(dev,
1350 : DRM_MODE_PROP_BLOB |
1351 : DRM_MODE_PROP_IMMUTABLE,
1352 : "PATH", 0);
1353 0 : if (!prop)
1354 : return -ENOMEM;
1355 0 : dev->mode_config.path_property = prop;
1356 :
1357 0 : prop = drm_property_create(dev,
1358 : DRM_MODE_PROP_BLOB |
1359 : DRM_MODE_PROP_IMMUTABLE,
1360 : "TILE", 0);
1361 0 : if (!prop)
1362 : return -ENOMEM;
1363 0 : dev->mode_config.tile_property = prop;
1364 :
1365 0 : prop = drm_property_create_enum(dev, 0, "link-status",
1366 : drm_link_status_enum_list,
1367 : ARRAY_SIZE(drm_link_status_enum_list));
1368 0 : if (!prop)
1369 : return -ENOMEM;
1370 0 : dev->mode_config.link_status_property = prop;
1371 :
1372 0 : prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
1373 0 : if (!prop)
1374 : return -ENOMEM;
1375 0 : dev->mode_config.non_desktop_property = prop;
1376 :
1377 0 : prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
1378 : "HDR_OUTPUT_METADATA", 0);
1379 0 : if (!prop)
1380 : return -ENOMEM;
1381 0 : dev->mode_config.hdr_output_metadata_property = prop;
1382 :
1383 0 : return 0;
1384 : }
1385 :
1386 : /**
1387 : * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1388 : * @dev: DRM device
1389 : *
1390 : * Called by a driver the first time a DVI-I connector is made.
1391 : *
1392 : * Returns: %0
1393 : */
1394 0 : int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1395 : {
1396 : struct drm_property *dvi_i_selector;
1397 : struct drm_property *dvi_i_subconnector;
1398 :
1399 0 : if (dev->mode_config.dvi_i_select_subconnector_property)
1400 : return 0;
1401 :
1402 0 : dvi_i_selector =
1403 : drm_property_create_enum(dev, 0,
1404 : "select subconnector",
1405 : drm_dvi_i_select_enum_list,
1406 : ARRAY_SIZE(drm_dvi_i_select_enum_list));
1407 0 : dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1408 :
1409 0 : dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1410 : "subconnector",
1411 : drm_dvi_i_subconnector_enum_list,
1412 : ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1413 0 : dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1414 :
1415 0 : return 0;
1416 : }
1417 : EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1418 :
1419 : /**
1420 : * drm_connector_attach_dp_subconnector_property - create subconnector property for DP
1421 : * @connector: drm_connector to attach property
1422 : *
1423 : * Called by a driver when DP connector is created.
1424 : */
1425 0 : void drm_connector_attach_dp_subconnector_property(struct drm_connector *connector)
1426 : {
1427 0 : struct drm_mode_config *mode_config = &connector->dev->mode_config;
1428 :
1429 0 : if (!mode_config->dp_subconnector_property)
1430 0 : mode_config->dp_subconnector_property =
1431 0 : drm_property_create_enum(connector->dev,
1432 : DRM_MODE_PROP_IMMUTABLE,
1433 : "subconnector",
1434 : drm_dp_subconnector_enum_list,
1435 : ARRAY_SIZE(drm_dp_subconnector_enum_list));
1436 :
1437 0 : drm_object_attach_property(&connector->base,
1438 : mode_config->dp_subconnector_property,
1439 : DRM_MODE_SUBCONNECTOR_Unknown);
1440 0 : }
1441 : EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property);
1442 :
1443 : /**
1444 : * DOC: HDMI connector properties
1445 : *
1446 : * content type (HDMI specific):
1447 : * Indicates content type setting to be used in HDMI infoframes to indicate
1448 : * content type for the external device, so that it adjusts its display
1449 : * settings accordingly.
1450 : *
1451 : * The value of this property can be one of the following:
1452 : *
1453 : * No Data:
1454 : * Content type is unknown
1455 : * Graphics:
1456 : * Content type is graphics
1457 : * Photo:
1458 : * Content type is photo
1459 : * Cinema:
1460 : * Content type is cinema
1461 : * Game:
1462 : * Content type is game
1463 : *
1464 : * The meaning of each content type is defined in CTA-861-G table 15.
1465 : *
1466 : * Drivers can set up this property by calling
1467 : * drm_connector_attach_content_type_property(). Decoding to
1468 : * infoframe values is done through drm_hdmi_avi_infoframe_content_type().
1469 : */
1470 :
1471 : /**
1472 : * drm_connector_attach_content_type_property - attach content-type property
1473 : * @connector: connector to attach content type property on.
1474 : *
1475 : * Called by a driver the first time a HDMI connector is made.
1476 : *
1477 : * Returns: %0
1478 : */
1479 0 : int drm_connector_attach_content_type_property(struct drm_connector *connector)
1480 : {
1481 0 : if (!drm_mode_create_content_type_property(connector->dev))
1482 0 : drm_object_attach_property(&connector->base,
1483 0 : connector->dev->mode_config.content_type_property,
1484 : DRM_MODE_CONTENT_TYPE_NO_DATA);
1485 0 : return 0;
1486 : }
1487 : EXPORT_SYMBOL(drm_connector_attach_content_type_property);
1488 :
1489 : /**
1490 : * drm_connector_attach_tv_margin_properties - attach TV connector margin
1491 : * properties
1492 : * @connector: DRM connector
1493 : *
1494 : * Called by a driver when it needs to attach TV margin props to a connector.
1495 : * Typically used on SDTV and HDMI connectors.
1496 : */
1497 0 : void drm_connector_attach_tv_margin_properties(struct drm_connector *connector)
1498 : {
1499 0 : struct drm_device *dev = connector->dev;
1500 :
1501 0 : drm_object_attach_property(&connector->base,
1502 : dev->mode_config.tv_left_margin_property,
1503 : 0);
1504 0 : drm_object_attach_property(&connector->base,
1505 : dev->mode_config.tv_right_margin_property,
1506 : 0);
1507 0 : drm_object_attach_property(&connector->base,
1508 : dev->mode_config.tv_top_margin_property,
1509 : 0);
1510 0 : drm_object_attach_property(&connector->base,
1511 : dev->mode_config.tv_bottom_margin_property,
1512 : 0);
1513 0 : }
1514 : EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties);
1515 :
1516 : /**
1517 : * drm_mode_create_tv_margin_properties - create TV connector margin properties
1518 : * @dev: DRM device
1519 : *
1520 : * Called by a driver's HDMI connector initialization routine, this function
1521 : * creates the TV margin properties for a given device. No need to call this
1522 : * function for an SDTV connector, it's already called from
1523 : * drm_mode_create_tv_properties().
1524 : *
1525 : * Returns:
1526 : * 0 on success or a negative error code on failure.
1527 : */
1528 0 : int drm_mode_create_tv_margin_properties(struct drm_device *dev)
1529 : {
1530 0 : if (dev->mode_config.tv_left_margin_property)
1531 : return 0;
1532 :
1533 0 : dev->mode_config.tv_left_margin_property =
1534 0 : drm_property_create_range(dev, 0, "left margin", 0, 100);
1535 0 : if (!dev->mode_config.tv_left_margin_property)
1536 : return -ENOMEM;
1537 :
1538 0 : dev->mode_config.tv_right_margin_property =
1539 0 : drm_property_create_range(dev, 0, "right margin", 0, 100);
1540 0 : if (!dev->mode_config.tv_right_margin_property)
1541 : return -ENOMEM;
1542 :
1543 0 : dev->mode_config.tv_top_margin_property =
1544 0 : drm_property_create_range(dev, 0, "top margin", 0, 100);
1545 0 : if (!dev->mode_config.tv_top_margin_property)
1546 : return -ENOMEM;
1547 :
1548 0 : dev->mode_config.tv_bottom_margin_property =
1549 0 : drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1550 0 : if (!dev->mode_config.tv_bottom_margin_property)
1551 : return -ENOMEM;
1552 :
1553 0 : return 0;
1554 : }
1555 : EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
1556 :
1557 : /**
1558 : * drm_mode_create_tv_properties - create TV specific connector properties
1559 : * @dev: DRM device
1560 : * @num_modes: number of different TV formats (modes) supported
1561 : * @modes: array of pointers to strings containing name of each format
1562 : *
1563 : * Called by a driver's TV initialization routine, this function creates
1564 : * the TV specific connector properties for a given device. Caller is
1565 : * responsible for allocating a list of format names and passing them to
1566 : * this routine.
1567 : *
1568 : * Returns:
1569 : * 0 on success or a negative error code on failure.
1570 : */
1571 0 : int drm_mode_create_tv_properties(struct drm_device *dev,
1572 : unsigned int num_modes,
1573 : const char * const modes[])
1574 : {
1575 : struct drm_property *tv_selector;
1576 : struct drm_property *tv_subconnector;
1577 : unsigned int i;
1578 :
1579 0 : if (dev->mode_config.tv_select_subconnector_property)
1580 : return 0;
1581 :
1582 : /*
1583 : * Basic connector properties
1584 : */
1585 0 : tv_selector = drm_property_create_enum(dev, 0,
1586 : "select subconnector",
1587 : drm_tv_select_enum_list,
1588 : ARRAY_SIZE(drm_tv_select_enum_list));
1589 0 : if (!tv_selector)
1590 : goto nomem;
1591 :
1592 0 : dev->mode_config.tv_select_subconnector_property = tv_selector;
1593 :
1594 0 : tv_subconnector =
1595 : drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1596 : "subconnector",
1597 : drm_tv_subconnector_enum_list,
1598 : ARRAY_SIZE(drm_tv_subconnector_enum_list));
1599 0 : if (!tv_subconnector)
1600 : goto nomem;
1601 0 : dev->mode_config.tv_subconnector_property = tv_subconnector;
1602 :
1603 : /*
1604 : * Other, TV specific properties: margins & TV modes.
1605 : */
1606 0 : if (drm_mode_create_tv_margin_properties(dev))
1607 : goto nomem;
1608 :
1609 0 : dev->mode_config.tv_mode_property =
1610 0 : drm_property_create(dev, DRM_MODE_PROP_ENUM,
1611 : "mode", num_modes);
1612 0 : if (!dev->mode_config.tv_mode_property)
1613 : goto nomem;
1614 :
1615 0 : for (i = 0; i < num_modes; i++)
1616 0 : drm_property_add_enum(dev->mode_config.tv_mode_property,
1617 0 : i, modes[i]);
1618 :
1619 0 : dev->mode_config.tv_brightness_property =
1620 0 : drm_property_create_range(dev, 0, "brightness", 0, 100);
1621 0 : if (!dev->mode_config.tv_brightness_property)
1622 : goto nomem;
1623 :
1624 0 : dev->mode_config.tv_contrast_property =
1625 0 : drm_property_create_range(dev, 0, "contrast", 0, 100);
1626 0 : if (!dev->mode_config.tv_contrast_property)
1627 : goto nomem;
1628 :
1629 0 : dev->mode_config.tv_flicker_reduction_property =
1630 0 : drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1631 0 : if (!dev->mode_config.tv_flicker_reduction_property)
1632 : goto nomem;
1633 :
1634 0 : dev->mode_config.tv_overscan_property =
1635 0 : drm_property_create_range(dev, 0, "overscan", 0, 100);
1636 0 : if (!dev->mode_config.tv_overscan_property)
1637 : goto nomem;
1638 :
1639 0 : dev->mode_config.tv_saturation_property =
1640 0 : drm_property_create_range(dev, 0, "saturation", 0, 100);
1641 0 : if (!dev->mode_config.tv_saturation_property)
1642 : goto nomem;
1643 :
1644 0 : dev->mode_config.tv_hue_property =
1645 0 : drm_property_create_range(dev, 0, "hue", 0, 100);
1646 0 : if (!dev->mode_config.tv_hue_property)
1647 : goto nomem;
1648 :
1649 : return 0;
1650 : nomem:
1651 : return -ENOMEM;
1652 : }
1653 : EXPORT_SYMBOL(drm_mode_create_tv_properties);
1654 :
1655 : /**
1656 : * drm_mode_create_scaling_mode_property - create scaling mode property
1657 : * @dev: DRM device
1658 : *
1659 : * Called by a driver the first time it's needed, must be attached to desired
1660 : * connectors.
1661 : *
1662 : * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1663 : * instead to correctly assign &drm_connector_state.scaling_mode
1664 : * in the atomic state.
1665 : *
1666 : * Returns: %0
1667 : */
1668 0 : int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1669 : {
1670 : struct drm_property *scaling_mode;
1671 :
1672 0 : if (dev->mode_config.scaling_mode_property)
1673 : return 0;
1674 :
1675 0 : scaling_mode =
1676 : drm_property_create_enum(dev, 0, "scaling mode",
1677 : drm_scaling_mode_enum_list,
1678 : ARRAY_SIZE(drm_scaling_mode_enum_list));
1679 :
1680 0 : dev->mode_config.scaling_mode_property = scaling_mode;
1681 :
1682 0 : return 0;
1683 : }
1684 : EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1685 :
1686 : /**
1687 : * DOC: Variable refresh properties
1688 : *
1689 : * Variable refresh rate capable displays can dynamically adjust their
1690 : * refresh rate by extending the duration of their vertical front porch
1691 : * until page flip or timeout occurs. This can reduce or remove stuttering
1692 : * and latency in scenarios where the page flip does not align with the
1693 : * vblank interval.
1694 : *
1695 : * An example scenario would be an application flipping at a constant rate
1696 : * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank
1697 : * interval and the same contents will be displayed twice. This can be
1698 : * observed as stuttering for content with motion.
1699 : *
1700 : * If variable refresh rate was active on a display that supported a
1701 : * variable refresh range from 35Hz to 60Hz no stuttering would be observable
1702 : * for the example scenario. The minimum supported variable refresh rate of
1703 : * 35Hz is below the page flip frequency and the vertical front porch can
1704 : * be extended until the page flip occurs. The vblank interval will be
1705 : * directly aligned to the page flip rate.
1706 : *
1707 : * Not all userspace content is suitable for use with variable refresh rate.
1708 : * Large and frequent changes in vertical front porch duration may worsen
1709 : * perceived stuttering for input sensitive applications.
1710 : *
1711 : * Panel brightness will also vary with vertical front porch duration. Some
1712 : * panels may have noticeable differences in brightness between the minimum
1713 : * vertical front porch duration and the maximum vertical front porch duration.
1714 : * Large and frequent changes in vertical front porch duration may produce
1715 : * observable flickering for such panels.
1716 : *
1717 : * Userspace control for variable refresh rate is supported via properties
1718 : * on the &drm_connector and &drm_crtc objects.
1719 : *
1720 : * "vrr_capable":
1721 : * Optional &drm_connector boolean property that drivers should attach
1722 : * with drm_connector_attach_vrr_capable_property() on connectors that
1723 : * could support variable refresh rates. Drivers should update the
1724 : * property value by calling drm_connector_set_vrr_capable_property().
1725 : *
1726 : * Absence of the property should indicate absence of support.
1727 : *
1728 : * "VRR_ENABLED":
1729 : * Default &drm_crtc boolean property that notifies the driver that the
1730 : * content on the CRTC is suitable for variable refresh rate presentation.
1731 : * The driver will take this property as a hint to enable variable
1732 : * refresh rate support if the receiver supports it, ie. if the
1733 : * "vrr_capable" property is true on the &drm_connector object. The
1734 : * vertical front porch duration will be extended until page-flip or
1735 : * timeout when enabled.
1736 : *
1737 : * The minimum vertical front porch duration is defined as the vertical
1738 : * front porch duration for the current mode.
1739 : *
1740 : * The maximum vertical front porch duration is greater than or equal to
1741 : * the minimum vertical front porch duration. The duration is derived
1742 : * from the minimum supported variable refresh rate for the connector.
1743 : *
1744 : * The driver may place further restrictions within these minimum
1745 : * and maximum bounds.
1746 : */
1747 :
1748 : /**
1749 : * drm_connector_attach_vrr_capable_property - creates the
1750 : * vrr_capable property
1751 : * @connector: connector to create the vrr_capable property on.
1752 : *
1753 : * This is used by atomic drivers to add support for querying
1754 : * variable refresh rate capability for a connector.
1755 : *
1756 : * Returns:
1757 : * Zero on success, negative errno on failure.
1758 : */
1759 0 : int drm_connector_attach_vrr_capable_property(
1760 : struct drm_connector *connector)
1761 : {
1762 0 : struct drm_device *dev = connector->dev;
1763 : struct drm_property *prop;
1764 :
1765 0 : if (!connector->vrr_capable_property) {
1766 0 : prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE,
1767 : "vrr_capable");
1768 0 : if (!prop)
1769 : return -ENOMEM;
1770 :
1771 0 : connector->vrr_capable_property = prop;
1772 0 : drm_object_attach_property(&connector->base, prop, 0);
1773 : }
1774 :
1775 : return 0;
1776 : }
1777 : EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property);
1778 :
1779 : /**
1780 : * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1781 : * @connector: connector to attach scaling mode property on.
1782 : * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1783 : *
1784 : * This is used to add support for scaling mode to atomic drivers.
1785 : * The scaling mode will be set to &drm_connector_state.scaling_mode
1786 : * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1787 : *
1788 : * This is the atomic version of drm_mode_create_scaling_mode_property().
1789 : *
1790 : * Returns:
1791 : * Zero on success, negative errno on failure.
1792 : */
1793 0 : int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1794 : u32 scaling_mode_mask)
1795 : {
1796 0 : struct drm_device *dev = connector->dev;
1797 : struct drm_property *scaling_mode_property;
1798 : int i;
1799 0 : const unsigned valid_scaling_mode_mask =
1800 : (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1801 :
1802 0 : if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
1803 : scaling_mode_mask & ~valid_scaling_mode_mask))
1804 : return -EINVAL;
1805 :
1806 0 : scaling_mode_property =
1807 0 : drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1808 0 : hweight32(scaling_mode_mask));
1809 :
1810 0 : if (!scaling_mode_property)
1811 : return -ENOMEM;
1812 :
1813 0 : for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1814 : int ret;
1815 :
1816 0 : if (!(BIT(i) & scaling_mode_mask))
1817 0 : continue;
1818 :
1819 0 : ret = drm_property_add_enum(scaling_mode_property,
1820 0 : drm_scaling_mode_enum_list[i].type,
1821 : drm_scaling_mode_enum_list[i].name);
1822 :
1823 0 : if (ret) {
1824 0 : drm_property_destroy(dev, scaling_mode_property);
1825 :
1826 0 : return ret;
1827 : }
1828 : }
1829 :
1830 0 : drm_object_attach_property(&connector->base,
1831 : scaling_mode_property, 0);
1832 :
1833 0 : connector->scaling_mode_property = scaling_mode_property;
1834 :
1835 0 : return 0;
1836 : }
1837 : EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1838 :
1839 : /**
1840 : * drm_mode_create_aspect_ratio_property - create aspect ratio property
1841 : * @dev: DRM device
1842 : *
1843 : * Called by a driver the first time it's needed, must be attached to desired
1844 : * connectors.
1845 : *
1846 : * Returns:
1847 : * Zero on success, negative errno on failure.
1848 : */
1849 0 : int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1850 : {
1851 0 : if (dev->mode_config.aspect_ratio_property)
1852 : return 0;
1853 :
1854 0 : dev->mode_config.aspect_ratio_property =
1855 0 : drm_property_create_enum(dev, 0, "aspect ratio",
1856 : drm_aspect_ratio_enum_list,
1857 : ARRAY_SIZE(drm_aspect_ratio_enum_list));
1858 :
1859 0 : if (dev->mode_config.aspect_ratio_property == NULL)
1860 : return -ENOMEM;
1861 :
1862 0 : return 0;
1863 : }
1864 : EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1865 :
1866 : /**
1867 : * DOC: standard connector properties
1868 : *
1869 : * Colorspace:
1870 : * This property helps select a suitable colorspace based on the sink
1871 : * capability. Modern sink devices support wider gamut like BT2020.
1872 : * This helps switch to BT2020 mode if the BT2020 encoded video stream
1873 : * is being played by the user, same for any other colorspace. Thereby
1874 : * giving a good visual experience to users.
1875 : *
1876 : * The expectation from userspace is that it should parse the EDID
1877 : * and get supported colorspaces. Use this property and switch to the
1878 : * one supported. Sink supported colorspaces should be retrieved by
1879 : * userspace from EDID and driver will not explicitly expose them.
1880 : *
1881 : * Basically the expectation from userspace is:
1882 : * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
1883 : * colorspace
1884 : * - Set this new property to let the sink know what it
1885 : * converted the CRTC output to.
1886 : * - This property is just to inform sink what colorspace
1887 : * source is trying to drive.
1888 : *
1889 : * Because between HDMI and DP have different colorspaces,
1890 : * drm_mode_create_hdmi_colorspace_property() is used for HDMI connector and
1891 : * drm_mode_create_dp_colorspace_property() is used for DP connector.
1892 : */
1893 :
1894 : /**
1895 : * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property
1896 : * @connector: connector to create the Colorspace property on.
1897 : *
1898 : * Called by a driver the first time it's needed, must be attached to desired
1899 : * HDMI connectors.
1900 : *
1901 : * Returns:
1902 : * Zero on success, negative errno on failure.
1903 : */
1904 0 : int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector)
1905 : {
1906 0 : struct drm_device *dev = connector->dev;
1907 :
1908 0 : if (connector->colorspace_property)
1909 : return 0;
1910 :
1911 0 : connector->colorspace_property =
1912 0 : drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
1913 : hdmi_colorspaces,
1914 : ARRAY_SIZE(hdmi_colorspaces));
1915 :
1916 0 : if (!connector->colorspace_property)
1917 : return -ENOMEM;
1918 :
1919 0 : return 0;
1920 : }
1921 : EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property);
1922 :
1923 : /**
1924 : * drm_mode_create_dp_colorspace_property - create dp colorspace property
1925 : * @connector: connector to create the Colorspace property on.
1926 : *
1927 : * Called by a driver the first time it's needed, must be attached to desired
1928 : * DP connectors.
1929 : *
1930 : * Returns:
1931 : * Zero on success, negative errno on failure.
1932 : */
1933 0 : int drm_mode_create_dp_colorspace_property(struct drm_connector *connector)
1934 : {
1935 0 : struct drm_device *dev = connector->dev;
1936 :
1937 0 : if (connector->colorspace_property)
1938 : return 0;
1939 :
1940 0 : connector->colorspace_property =
1941 0 : drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
1942 : dp_colorspaces,
1943 : ARRAY_SIZE(dp_colorspaces));
1944 :
1945 0 : if (!connector->colorspace_property)
1946 : return -ENOMEM;
1947 :
1948 0 : return 0;
1949 : }
1950 : EXPORT_SYMBOL(drm_mode_create_dp_colorspace_property);
1951 :
1952 : /**
1953 : * drm_mode_create_content_type_property - create content type property
1954 : * @dev: DRM device
1955 : *
1956 : * Called by a driver the first time it's needed, must be attached to desired
1957 : * connectors.
1958 : *
1959 : * Returns:
1960 : * Zero on success, negative errno on failure.
1961 : */
1962 0 : int drm_mode_create_content_type_property(struct drm_device *dev)
1963 : {
1964 0 : if (dev->mode_config.content_type_property)
1965 : return 0;
1966 :
1967 0 : dev->mode_config.content_type_property =
1968 0 : drm_property_create_enum(dev, 0, "content type",
1969 : drm_content_type_enum_list,
1970 : ARRAY_SIZE(drm_content_type_enum_list));
1971 :
1972 0 : if (dev->mode_config.content_type_property == NULL)
1973 : return -ENOMEM;
1974 :
1975 0 : return 0;
1976 : }
1977 : EXPORT_SYMBOL(drm_mode_create_content_type_property);
1978 :
1979 : /**
1980 : * drm_mode_create_suggested_offset_properties - create suggests offset properties
1981 : * @dev: DRM device
1982 : *
1983 : * Create the suggested x/y offset property for connectors.
1984 : *
1985 : * Returns:
1986 : * 0 on success or a negative error code on failure.
1987 : */
1988 0 : int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1989 : {
1990 0 : if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1991 : return 0;
1992 :
1993 0 : dev->mode_config.suggested_x_property =
1994 0 : drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1995 :
1996 0 : dev->mode_config.suggested_y_property =
1997 0 : drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1998 :
1999 0 : if (dev->mode_config.suggested_x_property == NULL ||
2000 : dev->mode_config.suggested_y_property == NULL)
2001 : return -ENOMEM;
2002 0 : return 0;
2003 : }
2004 : EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
2005 :
2006 : /**
2007 : * drm_connector_set_path_property - set tile property on connector
2008 : * @connector: connector to set property on.
2009 : * @path: path to use for property; must not be NULL.
2010 : *
2011 : * This creates a property to expose to userspace to specify a
2012 : * connector path. This is mainly used for DisplayPort MST where
2013 : * connectors have a topology and we want to allow userspace to give
2014 : * them more meaningful names.
2015 : *
2016 : * Returns:
2017 : * Zero on success, negative errno on failure.
2018 : */
2019 0 : int drm_connector_set_path_property(struct drm_connector *connector,
2020 : const char *path)
2021 : {
2022 0 : struct drm_device *dev = connector->dev;
2023 : int ret;
2024 :
2025 0 : ret = drm_property_replace_global_blob(dev,
2026 : &connector->path_blob_ptr,
2027 0 : strlen(path) + 1,
2028 : path,
2029 : &connector->base,
2030 : dev->mode_config.path_property);
2031 0 : return ret;
2032 : }
2033 : EXPORT_SYMBOL(drm_connector_set_path_property);
2034 :
2035 : /**
2036 : * drm_connector_set_tile_property - set tile property on connector
2037 : * @connector: connector to set property on.
2038 : *
2039 : * This looks up the tile information for a connector, and creates a
2040 : * property for userspace to parse if it exists. The property is of
2041 : * the form of 8 integers using ':' as a separator.
2042 : * This is used for dual port tiled displays with DisplayPort SST
2043 : * or DisplayPort MST connectors.
2044 : *
2045 : * Returns:
2046 : * Zero on success, errno on failure.
2047 : */
2048 0 : int drm_connector_set_tile_property(struct drm_connector *connector)
2049 : {
2050 0 : struct drm_device *dev = connector->dev;
2051 : char tile[256];
2052 : int ret;
2053 :
2054 0 : if (!connector->has_tile) {
2055 0 : ret = drm_property_replace_global_blob(dev,
2056 : &connector->tile_blob_ptr,
2057 : 0,
2058 : NULL,
2059 : &connector->base,
2060 : dev->mode_config.tile_property);
2061 0 : return ret;
2062 : }
2063 :
2064 0 : snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
2065 0 : connector->tile_group->id, connector->tile_is_single_monitor,
2066 0 : connector->num_h_tile, connector->num_v_tile,
2067 0 : connector->tile_h_loc, connector->tile_v_loc,
2068 0 : connector->tile_h_size, connector->tile_v_size);
2069 :
2070 0 : ret = drm_property_replace_global_blob(dev,
2071 : &connector->tile_blob_ptr,
2072 0 : strlen(tile) + 1,
2073 : tile,
2074 : &connector->base,
2075 : dev->mode_config.tile_property);
2076 0 : return ret;
2077 : }
2078 : EXPORT_SYMBOL(drm_connector_set_tile_property);
2079 :
2080 : /**
2081 : * drm_connector_update_edid_property - update the edid property of a connector
2082 : * @connector: drm connector
2083 : * @edid: new value of the edid property
2084 : *
2085 : * This function creates a new blob modeset object and assigns its id to the
2086 : * connector's edid property.
2087 : * Since we also parse tile information from EDID's displayID block, we also
2088 : * set the connector's tile property here. See drm_connector_set_tile_property()
2089 : * for more details.
2090 : *
2091 : * Returns:
2092 : * Zero on success, negative errno on failure.
2093 : */
2094 0 : int drm_connector_update_edid_property(struct drm_connector *connector,
2095 : const struct edid *edid)
2096 : {
2097 0 : struct drm_device *dev = connector->dev;
2098 0 : size_t size = 0;
2099 : int ret;
2100 : const struct edid *old_edid;
2101 :
2102 : /* ignore requests to set edid when overridden */
2103 0 : if (connector->override_edid)
2104 : return 0;
2105 :
2106 0 : if (edid)
2107 0 : size = EDID_LENGTH * (1 + edid->extensions);
2108 :
2109 : /* Set the display info, using edid if available, otherwise
2110 : * resetting the values to defaults. This duplicates the work
2111 : * done in drm_add_edid_modes, but that function is not
2112 : * consistently called before this one in all drivers and the
2113 : * computation is cheap enough that it seems better to
2114 : * duplicate it rather than attempt to ensure some arbitrary
2115 : * ordering of calls.
2116 : */
2117 0 : if (edid)
2118 0 : drm_add_display_info(connector, edid);
2119 : else
2120 0 : drm_reset_display_info(connector);
2121 :
2122 0 : drm_update_tile_info(connector, edid);
2123 :
2124 0 : if (connector->edid_blob_ptr) {
2125 0 : old_edid = (const struct edid *)connector->edid_blob_ptr->data;
2126 0 : if (old_edid) {
2127 0 : if (!drm_edid_are_equal(edid, old_edid)) {
2128 0 : DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Edid was changed.\n",
2129 : connector->base.id, connector->name);
2130 :
2131 0 : connector->epoch_counter += 1;
2132 0 : DRM_DEBUG_KMS("Updating change counter to %llu\n",
2133 : connector->epoch_counter);
2134 : }
2135 : }
2136 : }
2137 :
2138 0 : drm_object_property_set_value(&connector->base,
2139 : dev->mode_config.non_desktop_property,
2140 0 : connector->display_info.non_desktop);
2141 :
2142 0 : ret = drm_property_replace_global_blob(dev,
2143 : &connector->edid_blob_ptr,
2144 : size,
2145 : edid,
2146 : &connector->base,
2147 : dev->mode_config.edid_property);
2148 0 : if (ret)
2149 : return ret;
2150 0 : return drm_connector_set_tile_property(connector);
2151 : }
2152 : EXPORT_SYMBOL(drm_connector_update_edid_property);
2153 :
2154 : /**
2155 : * drm_connector_set_link_status_property - Set link status property of a connector
2156 : * @connector: drm connector
2157 : * @link_status: new value of link status property (0: Good, 1: Bad)
2158 : *
2159 : * In usual working scenario, this link status property will always be set to
2160 : * "GOOD". If something fails during or after a mode set, the kernel driver
2161 : * may set this link status property to "BAD". The caller then needs to send a
2162 : * hotplug uevent for userspace to re-check the valid modes through
2163 : * GET_CONNECTOR_IOCTL and retry modeset.
2164 : *
2165 : * Note: Drivers cannot rely on userspace to support this property and
2166 : * issue a modeset. As such, they may choose to handle issues (like
2167 : * re-training a link) without userspace's intervention.
2168 : *
2169 : * The reason for adding this property is to handle link training failures, but
2170 : * it is not limited to DP or link training. For example, if we implement
2171 : * asynchronous setcrtc, this property can be used to report any failures in that.
2172 : */
2173 0 : void drm_connector_set_link_status_property(struct drm_connector *connector,
2174 : uint64_t link_status)
2175 : {
2176 0 : struct drm_device *dev = connector->dev;
2177 :
2178 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2179 0 : connector->state->link_status = link_status;
2180 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
2181 0 : }
2182 : EXPORT_SYMBOL(drm_connector_set_link_status_property);
2183 :
2184 : /**
2185 : * drm_connector_attach_max_bpc_property - attach "max bpc" property
2186 : * @connector: connector to attach max bpc property on.
2187 : * @min: The minimum bit depth supported by the connector.
2188 : * @max: The maximum bit depth supported by the connector.
2189 : *
2190 : * This is used to add support for limiting the bit depth on a connector.
2191 : *
2192 : * Returns:
2193 : * Zero on success, negative errno on failure.
2194 : */
2195 0 : int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
2196 : int min, int max)
2197 : {
2198 0 : struct drm_device *dev = connector->dev;
2199 : struct drm_property *prop;
2200 :
2201 0 : prop = connector->max_bpc_property;
2202 0 : if (!prop) {
2203 0 : prop = drm_property_create_range(dev, 0, "max bpc", min, max);
2204 0 : if (!prop)
2205 : return -ENOMEM;
2206 :
2207 0 : connector->max_bpc_property = prop;
2208 : }
2209 :
2210 0 : drm_object_attach_property(&connector->base, prop, max);
2211 0 : connector->state->max_requested_bpc = max;
2212 0 : connector->state->max_bpc = max;
2213 :
2214 0 : return 0;
2215 : }
2216 : EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
2217 :
2218 : /**
2219 : * drm_connector_attach_hdr_output_metadata_property - attach "HDR_OUTPUT_METADA" property
2220 : * @connector: connector to attach the property on.
2221 : *
2222 : * This is used to allow the userspace to send HDR Metadata to the
2223 : * driver.
2224 : *
2225 : * Returns:
2226 : * Zero on success, negative errno on failure.
2227 : */
2228 0 : int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector)
2229 : {
2230 0 : struct drm_device *dev = connector->dev;
2231 0 : struct drm_property *prop = dev->mode_config.hdr_output_metadata_property;
2232 :
2233 0 : drm_object_attach_property(&connector->base, prop, 0);
2234 :
2235 0 : return 0;
2236 : }
2237 : EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
2238 :
2239 : /**
2240 : * drm_connector_attach_colorspace_property - attach "Colorspace" property
2241 : * @connector: connector to attach the property on.
2242 : *
2243 : * This is used to allow the userspace to signal the output colorspace
2244 : * to the driver.
2245 : *
2246 : * Returns:
2247 : * Zero on success, negative errno on failure.
2248 : */
2249 0 : int drm_connector_attach_colorspace_property(struct drm_connector *connector)
2250 : {
2251 0 : struct drm_property *prop = connector->colorspace_property;
2252 :
2253 0 : drm_object_attach_property(&connector->base, prop, DRM_MODE_COLORIMETRY_DEFAULT);
2254 :
2255 0 : return 0;
2256 : }
2257 : EXPORT_SYMBOL(drm_connector_attach_colorspace_property);
2258 :
2259 : /**
2260 : * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed
2261 : * @old_state: old connector state to compare
2262 : * @new_state: new connector state to compare
2263 : *
2264 : * This is used by HDR-enabled drivers to test whether the HDR metadata
2265 : * have changed between two different connector state (and thus probably
2266 : * requires a full blown mode change).
2267 : *
2268 : * Returns:
2269 : * True if the metadata are equal, False otherwise
2270 : */
2271 0 : bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
2272 : struct drm_connector_state *new_state)
2273 : {
2274 0 : struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
2275 0 : struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
2276 :
2277 0 : if (!old_blob || !new_blob)
2278 0 : return old_blob == new_blob;
2279 :
2280 0 : if (old_blob->length != new_blob->length)
2281 : return false;
2282 :
2283 0 : return !memcmp(old_blob->data, new_blob->data, old_blob->length);
2284 : }
2285 : EXPORT_SYMBOL(drm_connector_atomic_hdr_metadata_equal);
2286 :
2287 : /**
2288 : * drm_connector_set_vrr_capable_property - sets the variable refresh rate
2289 : * capable property for a connector
2290 : * @connector: drm connector
2291 : * @capable: True if the connector is variable refresh rate capable
2292 : *
2293 : * Should be used by atomic drivers to update the indicated support for
2294 : * variable refresh rate over a connector.
2295 : */
2296 0 : void drm_connector_set_vrr_capable_property(
2297 : struct drm_connector *connector, bool capable)
2298 : {
2299 0 : if (!connector->vrr_capable_property)
2300 : return;
2301 :
2302 0 : drm_object_property_set_value(&connector->base,
2303 : connector->vrr_capable_property,
2304 : capable);
2305 : }
2306 : EXPORT_SYMBOL(drm_connector_set_vrr_capable_property);
2307 :
2308 : /**
2309 : * drm_connector_set_panel_orientation - sets the connector's panel_orientation
2310 : * @connector: connector for which to set the panel-orientation property.
2311 : * @panel_orientation: drm_panel_orientation value to set
2312 : *
2313 : * This function sets the connector's panel_orientation and attaches
2314 : * a "panel orientation" property to the connector.
2315 : *
2316 : * Calling this function on a connector where the panel_orientation has
2317 : * already been set is a no-op (e.g. the orientation has been overridden with
2318 : * a kernel commandline option).
2319 : *
2320 : * It is allowed to call this function with a panel_orientation of
2321 : * DRM_MODE_PANEL_ORIENTATION_UNKNOWN, in which case it is a no-op.
2322 : *
2323 : * Returns:
2324 : * Zero on success, negative errno on failure.
2325 : */
2326 0 : int drm_connector_set_panel_orientation(
2327 : struct drm_connector *connector,
2328 : enum drm_panel_orientation panel_orientation)
2329 : {
2330 0 : struct drm_device *dev = connector->dev;
2331 0 : struct drm_display_info *info = &connector->display_info;
2332 : struct drm_property *prop;
2333 :
2334 : /* Already set? */
2335 0 : if (info->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2336 : return 0;
2337 :
2338 : /* Don't attach the property if the orientation is unknown */
2339 0 : if (panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2340 : return 0;
2341 :
2342 0 : info->panel_orientation = panel_orientation;
2343 :
2344 0 : prop = dev->mode_config.panel_orientation_property;
2345 0 : if (!prop) {
2346 0 : prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
2347 : "panel orientation",
2348 : drm_panel_orientation_enum_list,
2349 : ARRAY_SIZE(drm_panel_orientation_enum_list));
2350 0 : if (!prop)
2351 : return -ENOMEM;
2352 :
2353 0 : dev->mode_config.panel_orientation_property = prop;
2354 : }
2355 :
2356 0 : drm_object_attach_property(&connector->base, prop,
2357 0 : info->panel_orientation);
2358 0 : return 0;
2359 : }
2360 : EXPORT_SYMBOL(drm_connector_set_panel_orientation);
2361 :
2362 : /**
2363 : * drm_connector_set_panel_orientation_with_quirk - set the
2364 : * connector's panel_orientation after checking for quirks
2365 : * @connector: connector for which to init the panel-orientation property.
2366 : * @panel_orientation: drm_panel_orientation value to set
2367 : * @width: width in pixels of the panel, used for panel quirk detection
2368 : * @height: height in pixels of the panel, used for panel quirk detection
2369 : *
2370 : * Like drm_connector_set_panel_orientation(), but with a check for platform
2371 : * specific (e.g. DMI based) quirks overriding the passed in panel_orientation.
2372 : *
2373 : * Returns:
2374 : * Zero on success, negative errno on failure.
2375 : */
2376 0 : int drm_connector_set_panel_orientation_with_quirk(
2377 : struct drm_connector *connector,
2378 : enum drm_panel_orientation panel_orientation,
2379 : int width, int height)
2380 : {
2381 : int orientation_quirk;
2382 :
2383 0 : orientation_quirk = drm_get_panel_orientation_quirk(width, height);
2384 0 : if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2385 0 : panel_orientation = orientation_quirk;
2386 :
2387 0 : return drm_connector_set_panel_orientation(connector,
2388 : panel_orientation);
2389 : }
2390 : EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk);
2391 :
2392 : static const struct drm_prop_enum_list privacy_screen_enum[] = {
2393 : { PRIVACY_SCREEN_DISABLED, "Disabled" },
2394 : { PRIVACY_SCREEN_ENABLED, "Enabled" },
2395 : { PRIVACY_SCREEN_DISABLED_LOCKED, "Disabled-locked" },
2396 : { PRIVACY_SCREEN_ENABLED_LOCKED, "Enabled-locked" },
2397 : };
2398 :
2399 : /**
2400 : * drm_connector_create_privacy_screen_properties - create the drm connecter's
2401 : * privacy-screen properties.
2402 : * @connector: connector for which to create the privacy-screen properties
2403 : *
2404 : * This function creates the "privacy-screen sw-state" and "privacy-screen
2405 : * hw-state" properties for the connector. They are not attached.
2406 : */
2407 : void
2408 0 : drm_connector_create_privacy_screen_properties(struct drm_connector *connector)
2409 : {
2410 0 : if (connector->privacy_screen_sw_state_property)
2411 : return;
2412 :
2413 : /* Note sw-state only supports the first 2 values of the enum */
2414 0 : connector->privacy_screen_sw_state_property =
2415 0 : drm_property_create_enum(connector->dev, DRM_MODE_PROP_ENUM,
2416 : "privacy-screen sw-state",
2417 : privacy_screen_enum, 2);
2418 :
2419 0 : connector->privacy_screen_hw_state_property =
2420 0 : drm_property_create_enum(connector->dev,
2421 : DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_ENUM,
2422 : "privacy-screen hw-state",
2423 : privacy_screen_enum,
2424 : ARRAY_SIZE(privacy_screen_enum));
2425 : }
2426 : EXPORT_SYMBOL(drm_connector_create_privacy_screen_properties);
2427 :
2428 : /**
2429 : * drm_connector_attach_privacy_screen_properties - attach the drm connecter's
2430 : * privacy-screen properties.
2431 : * @connector: connector on which to attach the privacy-screen properties
2432 : *
2433 : * This function attaches the "privacy-screen sw-state" and "privacy-screen
2434 : * hw-state" properties to the connector. The initial state of both is set
2435 : * to "Disabled".
2436 : */
2437 : void
2438 0 : drm_connector_attach_privacy_screen_properties(struct drm_connector *connector)
2439 : {
2440 0 : if (!connector->privacy_screen_sw_state_property)
2441 : return;
2442 :
2443 0 : drm_object_attach_property(&connector->base,
2444 : connector->privacy_screen_sw_state_property,
2445 : PRIVACY_SCREEN_DISABLED);
2446 :
2447 0 : drm_object_attach_property(&connector->base,
2448 : connector->privacy_screen_hw_state_property,
2449 : PRIVACY_SCREEN_DISABLED);
2450 : }
2451 : EXPORT_SYMBOL(drm_connector_attach_privacy_screen_properties);
2452 :
2453 : static void drm_connector_update_privacy_screen_properties(
2454 : struct drm_connector *connector, bool set_sw_state)
2455 : {
2456 : enum drm_privacy_screen_status sw_state, hw_state;
2457 :
2458 0 : drm_privacy_screen_get_state(connector->privacy_screen,
2459 : &sw_state, &hw_state);
2460 :
2461 : if (set_sw_state)
2462 0 : connector->state->privacy_screen_sw_state = sw_state;
2463 0 : drm_object_property_set_value(&connector->base,
2464 : connector->privacy_screen_hw_state_property, hw_state);
2465 : }
2466 :
2467 0 : static int drm_connector_privacy_screen_notifier(
2468 : struct notifier_block *nb, unsigned long action, void *data)
2469 : {
2470 0 : struct drm_connector *connector =
2471 0 : container_of(nb, struct drm_connector, privacy_screen_notifier);
2472 0 : struct drm_device *dev = connector->dev;
2473 :
2474 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2475 0 : drm_connector_update_privacy_screen_properties(connector, true);
2476 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
2477 :
2478 0 : drm_sysfs_connector_status_event(connector,
2479 : connector->privacy_screen_sw_state_property);
2480 0 : drm_sysfs_connector_status_event(connector,
2481 : connector->privacy_screen_hw_state_property);
2482 :
2483 0 : return NOTIFY_DONE;
2484 : }
2485 :
2486 : /**
2487 : * drm_connector_attach_privacy_screen_provider - attach a privacy-screen to
2488 : * the connector
2489 : * @connector: connector to attach the privacy-screen to
2490 : * @priv: drm_privacy_screen to attach
2491 : *
2492 : * Create and attach the standard privacy-screen properties and register
2493 : * a generic notifier for generating sysfs-connector-status-events
2494 : * on external changes to the privacy-screen status.
2495 : * This function takes ownership of the passed in drm_privacy_screen and will
2496 : * call drm_privacy_screen_put() on it when the connector is destroyed.
2497 : */
2498 0 : void drm_connector_attach_privacy_screen_provider(
2499 : struct drm_connector *connector, struct drm_privacy_screen *priv)
2500 : {
2501 0 : connector->privacy_screen = priv;
2502 0 : connector->privacy_screen_notifier.notifier_call =
2503 : drm_connector_privacy_screen_notifier;
2504 :
2505 0 : drm_connector_create_privacy_screen_properties(connector);
2506 0 : drm_connector_update_privacy_screen_properties(connector, true);
2507 0 : drm_connector_attach_privacy_screen_properties(connector);
2508 0 : }
2509 : EXPORT_SYMBOL(drm_connector_attach_privacy_screen_provider);
2510 :
2511 : /**
2512 : * drm_connector_update_privacy_screen - update connector's privacy-screen sw-state
2513 : * @connector_state: connector-state to update the privacy-screen for
2514 : *
2515 : * This function calls drm_privacy_screen_set_sw_state() on the connector's
2516 : * privacy-screen.
2517 : *
2518 : * If the connector has no privacy-screen, then this is a no-op.
2519 : */
2520 0 : void drm_connector_update_privacy_screen(const struct drm_connector_state *connector_state)
2521 : {
2522 0 : struct drm_connector *connector = connector_state->connector;
2523 : int ret;
2524 :
2525 0 : if (!connector->privacy_screen)
2526 : return;
2527 :
2528 0 : ret = drm_privacy_screen_set_sw_state(connector->privacy_screen,
2529 : connector_state->privacy_screen_sw_state);
2530 : if (ret) {
2531 0 : drm_err(connector->dev, "Error updating privacy-screen sw_state\n");
2532 0 : return;
2533 : }
2534 :
2535 : /* The hw_state property value may have changed, update it. */
2536 : drm_connector_update_privacy_screen_properties(connector, false);
2537 : }
2538 : EXPORT_SYMBOL(drm_connector_update_privacy_screen);
2539 :
2540 0 : int drm_connector_set_obj_prop(struct drm_mode_object *obj,
2541 : struct drm_property *property,
2542 : uint64_t value)
2543 : {
2544 0 : int ret = -EINVAL;
2545 0 : struct drm_connector *connector = obj_to_connector(obj);
2546 :
2547 : /* Do DPMS ourselves */
2548 0 : if (property == connector->dev->mode_config.dpms_property) {
2549 0 : ret = (*connector->funcs->dpms)(connector, (int)value);
2550 0 : } else if (connector->funcs->set_property)
2551 0 : ret = connector->funcs->set_property(connector, property, value);
2552 :
2553 0 : if (!ret)
2554 0 : drm_object_property_set_value(&connector->base, property, value);
2555 0 : return ret;
2556 : }
2557 :
2558 0 : int drm_connector_property_set_ioctl(struct drm_device *dev,
2559 : void *data, struct drm_file *file_priv)
2560 : {
2561 0 : struct drm_mode_connector_set_property *conn_set_prop = data;
2562 0 : struct drm_mode_obj_set_property obj_set_prop = {
2563 0 : .value = conn_set_prop->value,
2564 0 : .prop_id = conn_set_prop->prop_id,
2565 0 : .obj_id = conn_set_prop->connector_id,
2566 : .obj_type = DRM_MODE_OBJECT_CONNECTOR
2567 : };
2568 :
2569 : /* It does all the locking and checking we need */
2570 0 : return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
2571 : }
2572 :
2573 : static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
2574 : {
2575 : /* For atomic drivers only state objects are synchronously updated and
2576 : * protected by modeset locks, so check those first.
2577 : */
2578 0 : if (connector->state)
2579 0 : return connector->state->best_encoder;
2580 : return connector->encoder;
2581 : }
2582 :
2583 : static bool
2584 0 : drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
2585 : const struct list_head *modes,
2586 : const struct drm_file *file_priv)
2587 : {
2588 : /*
2589 : * If user-space hasn't configured the driver to expose the stereo 3D
2590 : * modes, don't expose them.
2591 : */
2592 0 : if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
2593 : return false;
2594 : /*
2595 : * If user-space hasn't configured the driver to expose the modes
2596 : * with aspect-ratio, don't expose them. However if such a mode
2597 : * is unique, let it be exposed, but reset the aspect-ratio flags
2598 : * while preparing the list of user-modes.
2599 : */
2600 0 : if (!file_priv->aspect_ratio_allowed) {
2601 : const struct drm_display_mode *mode_itr;
2602 :
2603 0 : list_for_each_entry(mode_itr, modes, head) {
2604 0 : if (mode_itr->expose_to_userspace &&
2605 0 : drm_mode_match(mode_itr, mode,
2606 : DRM_MODE_MATCH_TIMINGS |
2607 : DRM_MODE_MATCH_CLOCK |
2608 : DRM_MODE_MATCH_FLAGS |
2609 : DRM_MODE_MATCH_3D_FLAGS))
2610 : return false;
2611 : }
2612 : }
2613 :
2614 : return true;
2615 : }
2616 :
2617 0 : int drm_mode_getconnector(struct drm_device *dev, void *data,
2618 : struct drm_file *file_priv)
2619 : {
2620 0 : struct drm_mode_get_connector *out_resp = data;
2621 : struct drm_connector *connector;
2622 : struct drm_encoder *encoder;
2623 : struct drm_display_mode *mode;
2624 0 : int mode_count = 0;
2625 0 : int encoders_count = 0;
2626 0 : int ret = 0;
2627 0 : int copied = 0;
2628 : struct drm_mode_modeinfo u_mode;
2629 : struct drm_mode_modeinfo __user *mode_ptr;
2630 : uint32_t __user *encoder_ptr;
2631 : bool is_current_master;
2632 :
2633 0 : if (!drm_core_check_feature(dev, DRIVER_MODESET))
2634 : return -EOPNOTSUPP;
2635 :
2636 0 : memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2637 :
2638 0 : connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
2639 0 : if (!connector)
2640 : return -ENOENT;
2641 :
2642 0 : encoders_count = hweight32(connector->possible_encoders);
2643 :
2644 0 : if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2645 0 : copied = 0;
2646 0 : encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2647 :
2648 0 : drm_connector_for_each_possible_encoder(connector, encoder) {
2649 0 : if (put_user(encoder->base.id, encoder_ptr + copied)) {
2650 : ret = -EFAULT;
2651 : goto out;
2652 : }
2653 0 : copied++;
2654 : }
2655 : }
2656 0 : out_resp->count_encoders = encoders_count;
2657 :
2658 0 : out_resp->connector_id = connector->base.id;
2659 0 : out_resp->connector_type = connector->connector_type;
2660 0 : out_resp->connector_type_id = connector->connector_type_id;
2661 :
2662 0 : is_current_master = drm_is_current_master(file_priv);
2663 :
2664 0 : mutex_lock(&dev->mode_config.mutex);
2665 0 : if (out_resp->count_modes == 0) {
2666 0 : if (is_current_master)
2667 0 : connector->funcs->fill_modes(connector,
2668 0 : dev->mode_config.max_width,
2669 0 : dev->mode_config.max_height);
2670 : else
2671 0 : drm_dbg_kms(dev, "User-space requested a forced probe on [CONNECTOR:%d:%s] but is not the DRM master, demoting to read-only probe",
2672 : connector->base.id, connector->name);
2673 : }
2674 :
2675 0 : out_resp->mm_width = connector->display_info.width_mm;
2676 0 : out_resp->mm_height = connector->display_info.height_mm;
2677 0 : out_resp->subpixel = connector->display_info.subpixel_order;
2678 0 : out_resp->connection = connector->status;
2679 :
2680 : /* delayed so we get modes regardless of pre-fill_modes state */
2681 0 : list_for_each_entry(mode, &connector->modes, head) {
2682 0 : WARN_ON(mode->expose_to_userspace);
2683 :
2684 0 : if (drm_mode_expose_to_userspace(mode, &connector->modes,
2685 : file_priv)) {
2686 0 : mode->expose_to_userspace = true;
2687 0 : mode_count++;
2688 : }
2689 : }
2690 :
2691 : /*
2692 : * This ioctl is called twice, once to determine how much space is
2693 : * needed, and the 2nd time to fill it.
2694 : */
2695 0 : if ((out_resp->count_modes >= mode_count) && mode_count) {
2696 0 : copied = 0;
2697 0 : mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2698 0 : list_for_each_entry(mode, &connector->modes, head) {
2699 0 : if (!mode->expose_to_userspace)
2700 0 : continue;
2701 :
2702 : /* Clear the tag for the next time around */
2703 0 : mode->expose_to_userspace = false;
2704 :
2705 0 : drm_mode_convert_to_umode(&u_mode, mode);
2706 : /*
2707 : * Reset aspect ratio flags of user-mode, if modes with
2708 : * aspect-ratio are not supported.
2709 : */
2710 0 : if (!file_priv->aspect_ratio_allowed)
2711 0 : u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
2712 0 : if (copy_to_user(mode_ptr + copied,
2713 : &u_mode, sizeof(u_mode))) {
2714 0 : ret = -EFAULT;
2715 :
2716 : /*
2717 : * Clear the tag for the rest of
2718 : * the modes for the next time around.
2719 : */
2720 0 : list_for_each_entry_continue(mode, &connector->modes, head)
2721 0 : mode->expose_to_userspace = false;
2722 :
2723 0 : mutex_unlock(&dev->mode_config.mutex);
2724 :
2725 0 : goto out;
2726 : }
2727 0 : copied++;
2728 : }
2729 : } else {
2730 : /* Clear the tag for the next time around */
2731 0 : list_for_each_entry(mode, &connector->modes, head)
2732 0 : mode->expose_to_userspace = false;
2733 : }
2734 :
2735 0 : out_resp->count_modes = mode_count;
2736 0 : mutex_unlock(&dev->mode_config.mutex);
2737 :
2738 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2739 0 : encoder = drm_connector_get_encoder(connector);
2740 0 : if (encoder)
2741 0 : out_resp->encoder_id = encoder->base.id;
2742 : else
2743 0 : out_resp->encoder_id = 0;
2744 :
2745 : /* Only grab properties after probing, to make sure EDID and other
2746 : * properties reflect the latest status.
2747 : */
2748 0 : ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
2749 0 : (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2750 0 : (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2751 0 : &out_resp->count_props);
2752 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
2753 :
2754 : out:
2755 0 : drm_connector_put(connector);
2756 :
2757 0 : return ret;
2758 : }
2759 :
2760 : /**
2761 : * drm_connector_find_by_fwnode - Find a connector based on the associated fwnode
2762 : * @fwnode: fwnode for which to find the matching drm_connector
2763 : *
2764 : * This functions looks up a drm_connector based on its associated fwnode. When
2765 : * a connector is found a reference to the connector is returned. The caller must
2766 : * call drm_connector_put() to release this reference when it is done with the
2767 : * connector.
2768 : *
2769 : * Returns: A reference to the found connector or an ERR_PTR().
2770 : */
2771 0 : struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
2772 : {
2773 0 : struct drm_connector *connector, *found = ERR_PTR(-ENODEV);
2774 :
2775 0 : if (!fwnode)
2776 : return ERR_PTR(-ENODEV);
2777 :
2778 0 : mutex_lock(&connector_list_lock);
2779 :
2780 0 : list_for_each_entry(connector, &connector_list, global_connector_list_entry) {
2781 0 : if (connector->fwnode == fwnode ||
2782 0 : (connector->fwnode && connector->fwnode->secondary == fwnode)) {
2783 0 : drm_connector_get(connector);
2784 0 : found = connector;
2785 0 : break;
2786 : }
2787 : }
2788 :
2789 0 : mutex_unlock(&connector_list_lock);
2790 :
2791 0 : return found;
2792 : }
2793 :
2794 : /**
2795 : * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
2796 : * @connector_fwnode: fwnode_handle to report the event on
2797 : *
2798 : * On some hardware a hotplug event notification may come from outside the display
2799 : * driver / device. An example of this is some USB Type-C setups where the hardware
2800 : * muxes the DisplayPort data and aux-lines but does not pass the altmode HPD
2801 : * status bit to the GPU's DP HPD pin.
2802 : *
2803 : * This function can be used to report these out-of-band events after obtaining
2804 : * a drm_connector reference through calling drm_connector_find_by_fwnode().
2805 : */
2806 0 : void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
2807 : {
2808 : struct drm_connector *connector;
2809 :
2810 0 : connector = drm_connector_find_by_fwnode(connector_fwnode);
2811 0 : if (IS_ERR(connector))
2812 : return;
2813 :
2814 0 : if (connector->funcs->oob_hotplug_event)
2815 0 : connector->funcs->oob_hotplug_event(connector);
2816 :
2817 : drm_connector_put(connector);
2818 : }
2819 : EXPORT_SYMBOL(drm_connector_oob_hotplug_event);
2820 :
2821 :
2822 : /**
2823 : * DOC: Tile group
2824 : *
2825 : * Tile groups are used to represent tiled monitors with a unique integer
2826 : * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
2827 : * we store this in a tile group, so we have a common identifier for all tiles
2828 : * in a monitor group. The property is called "TILE". Drivers can manage tile
2829 : * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
2830 : * drm_mode_get_tile_group(). But this is only needed for internal panels where
2831 : * the tile group information is exposed through a non-standard way.
2832 : */
2833 :
2834 0 : static void drm_tile_group_free(struct kref *kref)
2835 : {
2836 0 : struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
2837 0 : struct drm_device *dev = tg->dev;
2838 :
2839 0 : mutex_lock(&dev->mode_config.idr_mutex);
2840 0 : idr_remove(&dev->mode_config.tile_idr, tg->id);
2841 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2842 0 : kfree(tg);
2843 0 : }
2844 :
2845 : /**
2846 : * drm_mode_put_tile_group - drop a reference to a tile group.
2847 : * @dev: DRM device
2848 : * @tg: tile group to drop reference to.
2849 : *
2850 : * drop reference to tile group and free if 0.
2851 : */
2852 0 : void drm_mode_put_tile_group(struct drm_device *dev,
2853 : struct drm_tile_group *tg)
2854 : {
2855 0 : kref_put(&tg->refcount, drm_tile_group_free);
2856 0 : }
2857 : EXPORT_SYMBOL(drm_mode_put_tile_group);
2858 :
2859 : /**
2860 : * drm_mode_get_tile_group - get a reference to an existing tile group
2861 : * @dev: DRM device
2862 : * @topology: 8-bytes unique per monitor.
2863 : *
2864 : * Use the unique bytes to get a reference to an existing tile group.
2865 : *
2866 : * RETURNS:
2867 : * tile group or NULL if not found.
2868 : */
2869 0 : struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
2870 : const char topology[8])
2871 : {
2872 : struct drm_tile_group *tg;
2873 : int id;
2874 :
2875 0 : mutex_lock(&dev->mode_config.idr_mutex);
2876 0 : idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
2877 0 : if (!memcmp(tg->group_data, topology, 8)) {
2878 0 : if (!kref_get_unless_zero(&tg->refcount))
2879 0 : tg = NULL;
2880 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2881 0 : return tg;
2882 : }
2883 : }
2884 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2885 0 : return NULL;
2886 : }
2887 : EXPORT_SYMBOL(drm_mode_get_tile_group);
2888 :
2889 : /**
2890 : * drm_mode_create_tile_group - create a tile group from a displayid description
2891 : * @dev: DRM device
2892 : * @topology: 8-bytes unique per monitor.
2893 : *
2894 : * Create a tile group for the unique monitor, and get a unique
2895 : * identifier for the tile group.
2896 : *
2897 : * RETURNS:
2898 : * new tile group or NULL.
2899 : */
2900 0 : struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
2901 : const char topology[8])
2902 : {
2903 : struct drm_tile_group *tg;
2904 : int ret;
2905 :
2906 0 : tg = kzalloc(sizeof(*tg), GFP_KERNEL);
2907 0 : if (!tg)
2908 : return NULL;
2909 :
2910 0 : kref_init(&tg->refcount);
2911 0 : memcpy(tg->group_data, topology, 8);
2912 0 : tg->dev = dev;
2913 :
2914 0 : mutex_lock(&dev->mode_config.idr_mutex);
2915 0 : ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
2916 0 : if (ret >= 0) {
2917 0 : tg->id = ret;
2918 : } else {
2919 0 : kfree(tg);
2920 0 : tg = NULL;
2921 : }
2922 :
2923 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2924 0 : return tg;
2925 : }
2926 : EXPORT_SYMBOL(drm_mode_create_tile_group);
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