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_drv.h>
26 : #include <drm/drm_edid.h>
27 : #include <drm/drm_encoder.h>
28 : #include <drm/drm_file.h>
29 : #include <drm/drm_managed.h>
30 : #include <drm/drm_panel.h>
31 : #include <drm/drm_print.h>
32 : #include <drm/drm_privacy_screen_consumer.h>
33 : #include <drm/drm_sysfs.h>
34 : #include <drm/drm_utils.h>
35 :
36 : #include <linux/property.h>
37 : #include <linux/uaccess.h>
38 :
39 : #include <video/cmdline.h>
40 :
41 : #include "drm_crtc_internal.h"
42 : #include "drm_internal.h"
43 :
44 : /**
45 : * DOC: overview
46 : *
47 : * In DRM connectors are the general abstraction for display sinks, and include
48 : * also fixed panels or anything else that can display pixels in some form. As
49 : * opposed to all other KMS objects representing hardware (like CRTC, encoder or
50 : * plane abstractions) connectors can be hotplugged and unplugged at runtime.
51 : * Hence they are reference-counted using drm_connector_get() and
52 : * drm_connector_put().
53 : *
54 : * KMS driver must create, initialize, register and attach at a &struct
55 : * drm_connector for each such sink. The instance is created as other KMS
56 : * objects and initialized by setting the following fields. The connector is
57 : * initialized with a call to drm_connector_init() with a pointer to the
58 : * &struct drm_connector_funcs and a connector type, and then exposed to
59 : * userspace with a call to drm_connector_register().
60 : *
61 : * Connectors must be attached to an encoder to be used. For devices that map
62 : * connectors to encoders 1:1, the connector should be attached at
63 : * initialization time with a call to drm_connector_attach_encoder(). The
64 : * driver must also set the &drm_connector.encoder field to point to the
65 : * attached encoder.
66 : *
67 : * For connectors which are not fixed (like built-in panels) the driver needs to
68 : * support hotplug notifications. The simplest way to do that is by using the
69 : * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
70 : * hardware support for hotplug interrupts. Connectors with hardware hotplug
71 : * support can instead use e.g. drm_helper_hpd_irq_event().
72 : */
73 :
74 : /*
75 : * Global connector list for drm_connector_find_by_fwnode().
76 : * Note drm_connector_[un]register() first take connector->lock and then
77 : * take the connector_list_lock.
78 : */
79 : static DEFINE_MUTEX(connector_list_lock);
80 : static LIST_HEAD(connector_list);
81 :
82 : struct drm_conn_prop_enum_list {
83 : int type;
84 : const char *name;
85 : struct ida ida;
86 : };
87 :
88 : /*
89 : * Connector and encoder types.
90 : */
91 : static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
92 : { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
93 : { DRM_MODE_CONNECTOR_VGA, "VGA" },
94 : { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
95 : { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
96 : { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
97 : { DRM_MODE_CONNECTOR_Composite, "Composite" },
98 : { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
99 : { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
100 : { DRM_MODE_CONNECTOR_Component, "Component" },
101 : { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
102 : { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
103 : { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
104 : { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
105 : { DRM_MODE_CONNECTOR_TV, "TV" },
106 : { DRM_MODE_CONNECTOR_eDP, "eDP" },
107 : { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
108 : { DRM_MODE_CONNECTOR_DSI, "DSI" },
109 : { DRM_MODE_CONNECTOR_DPI, "DPI" },
110 : { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" },
111 : { DRM_MODE_CONNECTOR_SPI, "SPI" },
112 : { DRM_MODE_CONNECTOR_USB, "USB" },
113 : };
114 :
115 1 : void drm_connector_ida_init(void)
116 : {
117 : int i;
118 :
119 22 : for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
120 42 : ida_init(&drm_connector_enum_list[i].ida);
121 1 : }
122 :
123 0 : void drm_connector_ida_destroy(void)
124 : {
125 : int i;
126 :
127 0 : for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
128 0 : ida_destroy(&drm_connector_enum_list[i].ida);
129 0 : }
130 :
131 : /**
132 : * drm_get_connector_type_name - return a string for connector type
133 : * @type: The connector type (DRM_MODE_CONNECTOR_*)
134 : *
135 : * Returns: the name of the connector type, or NULL if the type is not valid.
136 : */
137 0 : const char *drm_get_connector_type_name(unsigned int type)
138 : {
139 0 : if (type < ARRAY_SIZE(drm_connector_enum_list))
140 0 : return drm_connector_enum_list[type].name;
141 :
142 : return NULL;
143 : }
144 : EXPORT_SYMBOL(drm_get_connector_type_name);
145 :
146 : /**
147 : * drm_connector_get_cmdline_mode - reads the user's cmdline mode
148 : * @connector: connector to query
149 : *
150 : * The kernel supports per-connector configuration of its consoles through
151 : * use of the video= parameter. This function parses that option and
152 : * extracts the user's specified mode (or enable/disable status) for a
153 : * particular connector. This is typically only used during the early fbdev
154 : * setup.
155 : */
156 0 : static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
157 : {
158 0 : struct drm_cmdline_mode *mode = &connector->cmdline_mode;
159 : const char *option;
160 :
161 0 : option = video_get_options(connector->name);
162 0 : if (!option)
163 : return;
164 :
165 0 : if (!drm_mode_parse_command_line_for_connector(option,
166 : connector,
167 : mode))
168 : return;
169 :
170 0 : if (mode->force) {
171 0 : DRM_INFO("forcing %s connector %s\n", connector->name,
172 : drm_get_connector_force_name(mode->force));
173 0 : connector->force = mode->force;
174 : }
175 :
176 0 : if (mode->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) {
177 0 : DRM_INFO("cmdline forces connector %s panel_orientation to %d\n",
178 : connector->name, mode->panel_orientation);
179 0 : drm_connector_set_panel_orientation(connector,
180 : mode->panel_orientation);
181 : }
182 :
183 0 : DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n",
184 : connector->name, mode->name,
185 : mode->xres, mode->yres,
186 : mode->refresh_specified ? mode->refresh : 60,
187 : mode->rb ? " reduced blanking" : "",
188 : mode->margins ? " with margins" : "",
189 : mode->interlace ? " interlaced" : "");
190 : }
191 :
192 0 : static void drm_connector_free(struct kref *kref)
193 : {
194 0 : struct drm_connector *connector =
195 0 : container_of(kref, struct drm_connector, base.refcount);
196 0 : struct drm_device *dev = connector->dev;
197 :
198 0 : drm_mode_object_unregister(dev, &connector->base);
199 0 : connector->funcs->destroy(connector);
200 0 : }
201 :
202 0 : void drm_connector_free_work_fn(struct work_struct *work)
203 : {
204 : struct drm_connector *connector, *n;
205 0 : struct drm_device *dev =
206 0 : container_of(work, struct drm_device, mode_config.connector_free_work);
207 0 : struct drm_mode_config *config = &dev->mode_config;
208 : unsigned long flags;
209 : struct llist_node *freed;
210 :
211 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
212 0 : freed = llist_del_all(&config->connector_free_list);
213 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
214 :
215 0 : llist_for_each_entry_safe(connector, n, freed, free_node) {
216 0 : drm_mode_object_unregister(dev, &connector->base);
217 0 : connector->funcs->destroy(connector);
218 : }
219 0 : }
220 :
221 0 : static int __drm_connector_init(struct drm_device *dev,
222 : struct drm_connector *connector,
223 : const struct drm_connector_funcs *funcs,
224 : int connector_type,
225 : struct i2c_adapter *ddc)
226 : {
227 0 : struct drm_mode_config *config = &dev->mode_config;
228 : int ret;
229 0 : struct ida *connector_ida =
230 : &drm_connector_enum_list[connector_type].ida;
231 :
232 0 : WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
233 : (!funcs->atomic_destroy_state ||
234 : !funcs->atomic_duplicate_state));
235 :
236 0 : ret = __drm_mode_object_add(dev, &connector->base,
237 : DRM_MODE_OBJECT_CONNECTOR,
238 : false, drm_connector_free);
239 0 : if (ret)
240 : return ret;
241 :
242 0 : connector->base.properties = &connector->properties;
243 0 : connector->dev = dev;
244 0 : connector->funcs = funcs;
245 :
246 : /* connector index is used with 32bit bitmasks */
247 0 : ret = ida_alloc_max(&config->connector_ida, 31, GFP_KERNEL);
248 0 : if (ret < 0) {
249 0 : DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
250 : drm_connector_enum_list[connector_type].name,
251 : ret);
252 0 : goto out_put;
253 : }
254 0 : connector->index = ret;
255 0 : ret = 0;
256 :
257 0 : connector->connector_type = connector_type;
258 0 : connector->connector_type_id =
259 0 : ida_alloc_min(connector_ida, 1, GFP_KERNEL);
260 0 : if (connector->connector_type_id < 0) {
261 : ret = connector->connector_type_id;
262 : goto out_put_id;
263 : }
264 0 : connector->name =
265 0 : kasprintf(GFP_KERNEL, "%s-%d",
266 : drm_connector_enum_list[connector_type].name,
267 : connector->connector_type_id);
268 0 : if (!connector->name) {
269 : ret = -ENOMEM;
270 : goto out_put_type_id;
271 : }
272 :
273 : /* provide ddc symlink in sysfs */
274 0 : connector->ddc = ddc;
275 :
276 0 : INIT_LIST_HEAD(&connector->global_connector_list_entry);
277 0 : INIT_LIST_HEAD(&connector->probed_modes);
278 0 : INIT_LIST_HEAD(&connector->modes);
279 0 : mutex_init(&connector->mutex);
280 0 : mutex_init(&connector->edid_override_mutex);
281 0 : connector->edid_blob_ptr = NULL;
282 0 : connector->epoch_counter = 0;
283 0 : connector->tile_blob_ptr = NULL;
284 0 : connector->status = connector_status_unknown;
285 0 : connector->display_info.panel_orientation =
286 : DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
287 :
288 0 : drm_connector_get_cmdline_mode(connector);
289 :
290 : /* We should add connectors at the end to avoid upsetting the connector
291 : * index too much.
292 : */
293 0 : spin_lock_irq(&config->connector_list_lock);
294 0 : list_add_tail(&connector->head, &config->connector_list);
295 0 : config->num_connector++;
296 0 : spin_unlock_irq(&config->connector_list_lock);
297 :
298 0 : if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL &&
299 0 : connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
300 : drm_connector_attach_edid_property(connector);
301 :
302 0 : drm_object_attach_property(&connector->base,
303 : config->dpms_property, 0);
304 :
305 0 : drm_object_attach_property(&connector->base,
306 : config->link_status_property,
307 : 0);
308 :
309 0 : drm_object_attach_property(&connector->base,
310 : config->non_desktop_property,
311 : 0);
312 0 : drm_object_attach_property(&connector->base,
313 : config->tile_property,
314 : 0);
315 :
316 0 : if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
317 0 : drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
318 : }
319 :
320 0 : connector->debugfs_entry = NULL;
321 : out_put_type_id:
322 0 : if (ret)
323 0 : ida_free(connector_ida, connector->connector_type_id);
324 : out_put_id:
325 0 : if (ret)
326 0 : ida_free(&config->connector_ida, connector->index);
327 : out_put:
328 0 : if (ret)
329 0 : drm_mode_object_unregister(dev, &connector->base);
330 :
331 : return ret;
332 : }
333 :
334 : /**
335 : * drm_connector_init - Init a preallocated connector
336 : * @dev: DRM device
337 : * @connector: the connector to init
338 : * @funcs: callbacks for this connector
339 : * @connector_type: user visible type of the connector
340 : *
341 : * Initialises a preallocated connector. Connectors should be
342 : * subclassed as part of driver connector objects.
343 : *
344 : * At driver unload time the driver's &drm_connector_funcs.destroy hook
345 : * should call drm_connector_cleanup() and free the connector structure.
346 : * The connector structure should not be allocated with devm_kzalloc().
347 : *
348 : * Note: consider using drmm_connector_init() instead of
349 : * drm_connector_init() to let the DRM managed resource infrastructure
350 : * take care of cleanup and deallocation.
351 : *
352 : * Returns:
353 : * Zero on success, error code on failure.
354 : */
355 0 : int drm_connector_init(struct drm_device *dev,
356 : struct drm_connector *connector,
357 : const struct drm_connector_funcs *funcs,
358 : int connector_type)
359 : {
360 0 : if (drm_WARN_ON(dev, !(funcs && funcs->destroy)))
361 : return -EINVAL;
362 :
363 0 : return __drm_connector_init(dev, connector, funcs, connector_type, NULL);
364 : }
365 : EXPORT_SYMBOL(drm_connector_init);
366 :
367 : /**
368 : * drm_connector_init_with_ddc - Init a preallocated connector
369 : * @dev: DRM device
370 : * @connector: the connector to init
371 : * @funcs: callbacks for this connector
372 : * @connector_type: user visible type of the connector
373 : * @ddc: pointer to the associated ddc adapter
374 : *
375 : * Initialises a preallocated connector. Connectors should be
376 : * subclassed as part of driver connector objects.
377 : *
378 : * At driver unload time the driver's &drm_connector_funcs.destroy hook
379 : * should call drm_connector_cleanup() and free the connector structure.
380 : * The connector structure should not be allocated with devm_kzalloc().
381 : *
382 : * Ensures that the ddc field of the connector is correctly set.
383 : *
384 : * Note: consider using drmm_connector_init() instead of
385 : * drm_connector_init_with_ddc() to let the DRM managed resource
386 : * infrastructure take care of cleanup and deallocation.
387 : *
388 : * Returns:
389 : * Zero on success, error code on failure.
390 : */
391 0 : int drm_connector_init_with_ddc(struct drm_device *dev,
392 : struct drm_connector *connector,
393 : const struct drm_connector_funcs *funcs,
394 : int connector_type,
395 : struct i2c_adapter *ddc)
396 : {
397 0 : if (drm_WARN_ON(dev, !(funcs && funcs->destroy)))
398 : return -EINVAL;
399 :
400 0 : return __drm_connector_init(dev, connector, funcs, connector_type, ddc);
401 : }
402 : EXPORT_SYMBOL(drm_connector_init_with_ddc);
403 :
404 0 : static void drm_connector_cleanup_action(struct drm_device *dev,
405 : void *ptr)
406 : {
407 0 : struct drm_connector *connector = ptr;
408 :
409 0 : drm_connector_cleanup(connector);
410 0 : }
411 :
412 : /**
413 : * drmm_connector_init - Init a preallocated connector
414 : * @dev: DRM device
415 : * @connector: the connector to init
416 : * @funcs: callbacks for this connector
417 : * @connector_type: user visible type of the connector
418 : * @ddc: optional pointer to the associated ddc adapter
419 : *
420 : * Initialises a preallocated connector. Connectors should be
421 : * subclassed as part of driver connector objects.
422 : *
423 : * Cleanup is automatically handled with a call to
424 : * drm_connector_cleanup() in a DRM-managed action.
425 : *
426 : * The connector structure should be allocated with drmm_kzalloc().
427 : *
428 : * Returns:
429 : * Zero on success, error code on failure.
430 : */
431 0 : int drmm_connector_init(struct drm_device *dev,
432 : struct drm_connector *connector,
433 : const struct drm_connector_funcs *funcs,
434 : int connector_type,
435 : struct i2c_adapter *ddc)
436 : {
437 : int ret;
438 :
439 0 : if (drm_WARN_ON(dev, funcs && funcs->destroy))
440 : return -EINVAL;
441 :
442 0 : ret = __drm_connector_init(dev, connector, funcs, connector_type, ddc);
443 0 : if (ret)
444 : return ret;
445 :
446 0 : ret = drmm_add_action_or_reset(dev, drm_connector_cleanup_action,
447 : connector);
448 0 : if (ret)
449 : return ret;
450 :
451 0 : return 0;
452 : }
453 : EXPORT_SYMBOL(drmm_connector_init);
454 :
455 : /**
456 : * drm_connector_attach_edid_property - attach edid property.
457 : * @connector: the connector
458 : *
459 : * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a
460 : * edid property attached by default. This function can be used to
461 : * explicitly enable the edid property in these cases.
462 : */
463 0 : void drm_connector_attach_edid_property(struct drm_connector *connector)
464 : {
465 0 : struct drm_mode_config *config = &connector->dev->mode_config;
466 :
467 0 : drm_object_attach_property(&connector->base,
468 : config->edid_property,
469 : 0);
470 0 : }
471 : EXPORT_SYMBOL(drm_connector_attach_edid_property);
472 :
473 : /**
474 : * drm_connector_attach_encoder - attach a connector to an encoder
475 : * @connector: connector to attach
476 : * @encoder: encoder to attach @connector to
477 : *
478 : * This function links up a connector to an encoder. Note that the routing
479 : * restrictions between encoders and crtcs are exposed to userspace through the
480 : * possible_clones and possible_crtcs bitmasks.
481 : *
482 : * Returns:
483 : * Zero on success, negative errno on failure.
484 : */
485 0 : int drm_connector_attach_encoder(struct drm_connector *connector,
486 : struct drm_encoder *encoder)
487 : {
488 : /*
489 : * In the past, drivers have attempted to model the static association
490 : * of connector to encoder in simple connector/encoder devices using a
491 : * direct assignment of connector->encoder = encoder. This connection
492 : * is a logical one and the responsibility of the core, so drivers are
493 : * expected not to mess with this.
494 : *
495 : * Note that the error return should've been enough here, but a large
496 : * majority of drivers ignores the return value, so add in a big WARN
497 : * to get people's attention.
498 : */
499 0 : if (WARN_ON(connector->encoder))
500 : return -EINVAL;
501 :
502 0 : connector->possible_encoders |= drm_encoder_mask(encoder);
503 :
504 0 : return 0;
505 : }
506 : EXPORT_SYMBOL(drm_connector_attach_encoder);
507 :
508 : /**
509 : * drm_connector_has_possible_encoder - check if the connector and encoder are
510 : * associated with each other
511 : * @connector: the connector
512 : * @encoder: the encoder
513 : *
514 : * Returns:
515 : * True if @encoder is one of the possible encoders for @connector.
516 : */
517 0 : bool drm_connector_has_possible_encoder(struct drm_connector *connector,
518 : struct drm_encoder *encoder)
519 : {
520 0 : return connector->possible_encoders & drm_encoder_mask(encoder);
521 : }
522 : EXPORT_SYMBOL(drm_connector_has_possible_encoder);
523 :
524 : static void drm_mode_remove(struct drm_connector *connector,
525 : struct drm_display_mode *mode)
526 : {
527 0 : list_del(&mode->head);
528 0 : drm_mode_destroy(connector->dev, mode);
529 : }
530 :
531 : /**
532 : * drm_connector_cleanup - cleans up an initialised connector
533 : * @connector: connector to cleanup
534 : *
535 : * Cleans up the connector but doesn't free the object.
536 : */
537 0 : void drm_connector_cleanup(struct drm_connector *connector)
538 : {
539 0 : struct drm_device *dev = connector->dev;
540 : struct drm_display_mode *mode, *t;
541 :
542 : /* The connector should have been removed from userspace long before
543 : * it is finally destroyed.
544 : */
545 0 : if (WARN_ON(connector->registration_state ==
546 : DRM_CONNECTOR_REGISTERED))
547 0 : drm_connector_unregister(connector);
548 :
549 0 : if (connector->privacy_screen) {
550 0 : drm_privacy_screen_put(connector->privacy_screen);
551 0 : connector->privacy_screen = NULL;
552 : }
553 :
554 0 : if (connector->tile_group) {
555 0 : drm_mode_put_tile_group(dev, connector->tile_group);
556 0 : connector->tile_group = NULL;
557 : }
558 :
559 0 : list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
560 0 : drm_mode_remove(connector, mode);
561 :
562 0 : list_for_each_entry_safe(mode, t, &connector->modes, head)
563 0 : drm_mode_remove(connector, mode);
564 :
565 0 : ida_free(&drm_connector_enum_list[connector->connector_type].ida,
566 0 : connector->connector_type_id);
567 :
568 0 : ida_free(&dev->mode_config.connector_ida, connector->index);
569 :
570 0 : kfree(connector->display_info.bus_formats);
571 0 : kfree(connector->display_info.vics);
572 0 : drm_mode_object_unregister(dev, &connector->base);
573 0 : kfree(connector->name);
574 0 : connector->name = NULL;
575 0 : fwnode_handle_put(connector->fwnode);
576 0 : connector->fwnode = NULL;
577 0 : spin_lock_irq(&dev->mode_config.connector_list_lock);
578 0 : list_del(&connector->head);
579 0 : dev->mode_config.num_connector--;
580 0 : spin_unlock_irq(&dev->mode_config.connector_list_lock);
581 :
582 0 : WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
583 0 : if (connector->state && connector->funcs->atomic_destroy_state)
584 0 : connector->funcs->atomic_destroy_state(connector,
585 : connector->state);
586 :
587 0 : mutex_destroy(&connector->mutex);
588 :
589 0 : memset(connector, 0, sizeof(*connector));
590 :
591 0 : if (dev->registered)
592 0 : drm_sysfs_hotplug_event(dev);
593 0 : }
594 : EXPORT_SYMBOL(drm_connector_cleanup);
595 :
596 : /**
597 : * drm_connector_register - register a connector
598 : * @connector: the connector to register
599 : *
600 : * Register userspace interfaces for a connector. Only call this for connectors
601 : * which can be hotplugged after drm_dev_register() has been called already,
602 : * e.g. DP MST connectors. All other connectors will be registered automatically
603 : * when calling drm_dev_register().
604 : *
605 : * When the connector is no longer available, callers must call
606 : * drm_connector_unregister().
607 : *
608 : * Returns:
609 : * Zero on success, error code on failure.
610 : */
611 0 : int drm_connector_register(struct drm_connector *connector)
612 : {
613 0 : int ret = 0;
614 :
615 0 : if (!connector->dev->registered)
616 : return 0;
617 :
618 0 : mutex_lock(&connector->mutex);
619 0 : if (connector->registration_state != DRM_CONNECTOR_INITIALIZING)
620 : goto unlock;
621 :
622 0 : ret = drm_sysfs_connector_add(connector);
623 0 : if (ret)
624 : goto unlock;
625 :
626 0 : drm_debugfs_connector_add(connector);
627 :
628 0 : if (connector->funcs->late_register) {
629 0 : ret = connector->funcs->late_register(connector);
630 0 : if (ret)
631 : goto err_debugfs;
632 : }
633 :
634 0 : drm_mode_object_register(connector->dev, &connector->base);
635 :
636 0 : connector->registration_state = DRM_CONNECTOR_REGISTERED;
637 :
638 : /* Let userspace know we have a new connector */
639 0 : drm_sysfs_connector_hotplug_event(connector);
640 :
641 0 : if (connector->privacy_screen)
642 : drm_privacy_screen_register_notifier(connector->privacy_screen,
643 : &connector->privacy_screen_notifier);
644 :
645 0 : mutex_lock(&connector_list_lock);
646 0 : list_add_tail(&connector->global_connector_list_entry, &connector_list);
647 0 : mutex_unlock(&connector_list_lock);
648 0 : goto unlock;
649 :
650 : err_debugfs:
651 0 : drm_debugfs_connector_remove(connector);
652 0 : drm_sysfs_connector_remove(connector);
653 : unlock:
654 0 : mutex_unlock(&connector->mutex);
655 0 : return ret;
656 : }
657 : EXPORT_SYMBOL(drm_connector_register);
658 :
659 : /**
660 : * drm_connector_unregister - unregister a connector
661 : * @connector: the connector to unregister
662 : *
663 : * Unregister userspace interfaces for a connector. Only call this for
664 : * connectors which have been registered explicitly by calling
665 : * drm_connector_register().
666 : */
667 0 : void drm_connector_unregister(struct drm_connector *connector)
668 : {
669 0 : mutex_lock(&connector->mutex);
670 0 : if (connector->registration_state != DRM_CONNECTOR_REGISTERED) {
671 0 : mutex_unlock(&connector->mutex);
672 0 : return;
673 : }
674 :
675 0 : mutex_lock(&connector_list_lock);
676 0 : list_del_init(&connector->global_connector_list_entry);
677 0 : mutex_unlock(&connector_list_lock);
678 :
679 0 : if (connector->privacy_screen)
680 : drm_privacy_screen_unregister_notifier(
681 : connector->privacy_screen,
682 : &connector->privacy_screen_notifier);
683 :
684 0 : if (connector->funcs->early_unregister)
685 0 : connector->funcs->early_unregister(connector);
686 :
687 0 : drm_sysfs_connector_remove(connector);
688 0 : drm_debugfs_connector_remove(connector);
689 :
690 0 : connector->registration_state = DRM_CONNECTOR_UNREGISTERED;
691 0 : mutex_unlock(&connector->mutex);
692 : }
693 : EXPORT_SYMBOL(drm_connector_unregister);
694 :
695 0 : void drm_connector_unregister_all(struct drm_device *dev)
696 : {
697 : struct drm_connector *connector;
698 : struct drm_connector_list_iter conn_iter;
699 :
700 : drm_connector_list_iter_begin(dev, &conn_iter);
701 0 : drm_for_each_connector_iter(connector, &conn_iter)
702 0 : drm_connector_unregister(connector);
703 0 : drm_connector_list_iter_end(&conn_iter);
704 0 : }
705 :
706 0 : int drm_connector_register_all(struct drm_device *dev)
707 : {
708 : struct drm_connector *connector;
709 : struct drm_connector_list_iter conn_iter;
710 0 : int ret = 0;
711 :
712 : drm_connector_list_iter_begin(dev, &conn_iter);
713 0 : drm_for_each_connector_iter(connector, &conn_iter) {
714 0 : ret = drm_connector_register(connector);
715 0 : if (ret)
716 : break;
717 : }
718 0 : drm_connector_list_iter_end(&conn_iter);
719 :
720 0 : if (ret)
721 0 : drm_connector_unregister_all(dev);
722 0 : return ret;
723 : }
724 :
725 : /**
726 : * drm_get_connector_status_name - return a string for connector status
727 : * @status: connector status to compute name of
728 : *
729 : * In contrast to the other drm_get_*_name functions this one here returns a
730 : * const pointer and hence is threadsafe.
731 : *
732 : * Returns: connector status string
733 : */
734 0 : const char *drm_get_connector_status_name(enum drm_connector_status status)
735 : {
736 0 : if (status == connector_status_connected)
737 : return "connected";
738 0 : else if (status == connector_status_disconnected)
739 : return "disconnected";
740 : else
741 0 : return "unknown";
742 : }
743 : EXPORT_SYMBOL(drm_get_connector_status_name);
744 :
745 : /**
746 : * drm_get_connector_force_name - return a string for connector force
747 : * @force: connector force to get name of
748 : *
749 : * Returns: const pointer to name.
750 : */
751 0 : const char *drm_get_connector_force_name(enum drm_connector_force force)
752 : {
753 : switch (force) {
754 : case DRM_FORCE_UNSPECIFIED:
755 : return "unspecified";
756 : case DRM_FORCE_OFF:
757 : return "off";
758 : case DRM_FORCE_ON:
759 : return "on";
760 : case DRM_FORCE_ON_DIGITAL:
761 : return "digital";
762 : default:
763 : return "unknown";
764 : }
765 : }
766 :
767 : #ifdef CONFIG_LOCKDEP
768 : static struct lockdep_map connector_list_iter_dep_map = {
769 : .name = "drm_connector_list_iter"
770 : };
771 : #endif
772 :
773 : /**
774 : * drm_connector_list_iter_begin - initialize a connector_list iterator
775 : * @dev: DRM device
776 : * @iter: connector_list iterator
777 : *
778 : * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
779 : * must always be cleaned up again by calling drm_connector_list_iter_end().
780 : * Iteration itself happens using drm_connector_list_iter_next() or
781 : * drm_for_each_connector_iter().
782 : */
783 5 : void drm_connector_list_iter_begin(struct drm_device *dev,
784 : struct drm_connector_list_iter *iter)
785 : {
786 5 : iter->dev = dev;
787 5 : iter->conn = NULL;
788 : lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
789 5 : }
790 : EXPORT_SYMBOL(drm_connector_list_iter_begin);
791 :
792 : /*
793 : * Extra-safe connector put function that works in any context. Should only be
794 : * used from the connector_iter functions, where we never really expect to
795 : * actually release the connector when dropping our final reference.
796 : */
797 : static void
798 0 : __drm_connector_put_safe(struct drm_connector *conn)
799 : {
800 0 : struct drm_mode_config *config = &conn->dev->mode_config;
801 :
802 : lockdep_assert_held(&config->connector_list_lock);
803 :
804 0 : if (!refcount_dec_and_test(&conn->base.refcount.refcount))
805 : return;
806 :
807 0 : llist_add(&conn->free_node, &config->connector_free_list);
808 0 : schedule_work(&config->connector_free_work);
809 : }
810 :
811 : /**
812 : * drm_connector_list_iter_next - return next connector
813 : * @iter: connector_list iterator
814 : *
815 : * Returns: the next connector for @iter, or NULL when the list walk has
816 : * completed.
817 : */
818 : struct drm_connector *
819 5 : drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
820 : {
821 5 : struct drm_connector *old_conn = iter->conn;
822 5 : struct drm_mode_config *config = &iter->dev->mode_config;
823 : struct list_head *lhead;
824 : unsigned long flags;
825 :
826 5 : spin_lock_irqsave(&config->connector_list_lock, flags);
827 5 : lhead = old_conn ? &old_conn->head : &config->connector_list;
828 :
829 : do {
830 5 : if (lhead->next == &config->connector_list) {
831 5 : iter->conn = NULL;
832 5 : break;
833 : }
834 :
835 0 : lhead = lhead->next;
836 0 : iter->conn = list_entry(lhead, struct drm_connector, head);
837 :
838 : /* loop until it's not a zombie connector */
839 0 : } while (!kref_get_unless_zero(&iter->conn->base.refcount));
840 :
841 5 : if (old_conn)
842 0 : __drm_connector_put_safe(old_conn);
843 10 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
844 :
845 5 : return iter->conn;
846 : }
847 : EXPORT_SYMBOL(drm_connector_list_iter_next);
848 :
849 : /**
850 : * drm_connector_list_iter_end - tear down a connector_list iterator
851 : * @iter: connector_list iterator
852 : *
853 : * Tears down @iter and releases any resources (like &drm_connector references)
854 : * acquired while walking the list. This must always be called, both when the
855 : * iteration completes fully or when it was aborted without walking the entire
856 : * list.
857 : */
858 5 : void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
859 : {
860 5 : struct drm_mode_config *config = &iter->dev->mode_config;
861 : unsigned long flags;
862 :
863 5 : iter->dev = NULL;
864 5 : if (iter->conn) {
865 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
866 0 : __drm_connector_put_safe(iter->conn);
867 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
868 : }
869 : lock_release(&connector_list_iter_dep_map, _RET_IP_);
870 5 : }
871 : EXPORT_SYMBOL(drm_connector_list_iter_end);
872 :
873 : static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
874 : { SubPixelUnknown, "Unknown" },
875 : { SubPixelHorizontalRGB, "Horizontal RGB" },
876 : { SubPixelHorizontalBGR, "Horizontal BGR" },
877 : { SubPixelVerticalRGB, "Vertical RGB" },
878 : { SubPixelVerticalBGR, "Vertical BGR" },
879 : { SubPixelNone, "None" },
880 : };
881 :
882 : /**
883 : * drm_get_subpixel_order_name - return a string for a given subpixel enum
884 : * @order: enum of subpixel_order
885 : *
886 : * Note you could abuse this and return something out of bounds, but that
887 : * would be a caller error. No unscrubbed user data should make it here.
888 : *
889 : * Returns: string describing an enumerated subpixel property
890 : */
891 0 : const char *drm_get_subpixel_order_name(enum subpixel_order order)
892 : {
893 0 : return drm_subpixel_enum_list[order].name;
894 : }
895 : EXPORT_SYMBOL(drm_get_subpixel_order_name);
896 :
897 : static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
898 : { DRM_MODE_DPMS_ON, "On" },
899 : { DRM_MODE_DPMS_STANDBY, "Standby" },
900 : { DRM_MODE_DPMS_SUSPEND, "Suspend" },
901 : { DRM_MODE_DPMS_OFF, "Off" }
902 : };
903 0 : DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
904 :
905 : static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
906 : { DRM_MODE_LINK_STATUS_GOOD, "Good" },
907 : { DRM_MODE_LINK_STATUS_BAD, "Bad" },
908 : };
909 :
910 : /**
911 : * drm_display_info_set_bus_formats - set the supported bus formats
912 : * @info: display info to store bus formats in
913 : * @formats: array containing the supported bus formats
914 : * @num_formats: the number of entries in the fmts array
915 : *
916 : * Store the supported bus formats in display info structure.
917 : * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
918 : * a full list of available formats.
919 : *
920 : * Returns:
921 : * 0 on success or a negative error code on failure.
922 : */
923 0 : int drm_display_info_set_bus_formats(struct drm_display_info *info,
924 : const u32 *formats,
925 : unsigned int num_formats)
926 : {
927 0 : u32 *fmts = NULL;
928 :
929 0 : if (!formats && num_formats)
930 : return -EINVAL;
931 :
932 0 : if (formats && num_formats) {
933 0 : fmts = kmemdup(formats, sizeof(*formats) * num_formats,
934 : GFP_KERNEL);
935 0 : if (!fmts)
936 : return -ENOMEM;
937 : }
938 :
939 0 : kfree(info->bus_formats);
940 0 : info->bus_formats = fmts;
941 0 : info->num_bus_formats = num_formats;
942 :
943 0 : return 0;
944 : }
945 : EXPORT_SYMBOL(drm_display_info_set_bus_formats);
946 :
947 : /* Optional connector properties. */
948 : static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
949 : { DRM_MODE_SCALE_NONE, "None" },
950 : { DRM_MODE_SCALE_FULLSCREEN, "Full" },
951 : { DRM_MODE_SCALE_CENTER, "Center" },
952 : { DRM_MODE_SCALE_ASPECT, "Full aspect" },
953 : };
954 :
955 : static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
956 : { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
957 : { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
958 : { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
959 : };
960 :
961 : static const struct drm_prop_enum_list drm_content_type_enum_list[] = {
962 : { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" },
963 : { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" },
964 : { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" },
965 : { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" },
966 : { DRM_MODE_CONTENT_TYPE_GAME, "Game" },
967 : };
968 :
969 : static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
970 : { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
971 : { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
972 : { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
973 : { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
974 : };
975 :
976 : static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
977 : { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
978 : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
979 : { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
980 : };
981 0 : DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
982 :
983 : static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
984 : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
985 : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
986 : { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
987 : };
988 0 : DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
989 : drm_dvi_i_subconnector_enum_list)
990 :
991 : static const struct drm_prop_enum_list drm_tv_mode_enum_list[] = {
992 : { DRM_MODE_TV_MODE_NTSC, "NTSC" },
993 : { DRM_MODE_TV_MODE_NTSC_443, "NTSC-443" },
994 : { DRM_MODE_TV_MODE_NTSC_J, "NTSC-J" },
995 : { DRM_MODE_TV_MODE_PAL, "PAL" },
996 : { DRM_MODE_TV_MODE_PAL_M, "PAL-M" },
997 : { DRM_MODE_TV_MODE_PAL_N, "PAL-N" },
998 : { DRM_MODE_TV_MODE_SECAM, "SECAM" },
999 : };
1000 0 : DRM_ENUM_NAME_FN(drm_get_tv_mode_name, drm_tv_mode_enum_list)
1001 :
1002 : /**
1003 : * drm_get_tv_mode_from_name - Translates a TV mode name into its enum value
1004 : * @name: TV Mode name we want to convert
1005 : * @len: Length of @name
1006 : *
1007 : * Translates @name into an enum drm_connector_tv_mode.
1008 : *
1009 : * Returns: the enum value on success, a negative errno otherwise.
1010 : */
1011 0 : int drm_get_tv_mode_from_name(const char *name, size_t len)
1012 : {
1013 : unsigned int i;
1014 :
1015 0 : for (i = 0; i < ARRAY_SIZE(drm_tv_mode_enum_list); i++) {
1016 0 : const struct drm_prop_enum_list *item = &drm_tv_mode_enum_list[i];
1017 :
1018 0 : if (strlen(item->name) == len && !strncmp(item->name, name, len))
1019 0 : return item->type;
1020 : }
1021 :
1022 : return -EINVAL;
1023 : }
1024 : EXPORT_SYMBOL(drm_get_tv_mode_from_name);
1025 :
1026 : static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
1027 : { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
1028 : { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
1029 : { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
1030 : { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
1031 : { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
1032 : };
1033 0 : DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
1034 :
1035 : static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
1036 : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
1037 : { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
1038 : { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
1039 : { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
1040 : { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
1041 : };
1042 0 : DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
1043 : drm_tv_subconnector_enum_list)
1044 :
1045 : static const struct drm_prop_enum_list drm_dp_subconnector_enum_list[] = {
1046 : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
1047 : { DRM_MODE_SUBCONNECTOR_VGA, "VGA" }, /* DP */
1048 : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DP */
1049 : { DRM_MODE_SUBCONNECTOR_HDMIA, "HDMI" }, /* DP */
1050 : { DRM_MODE_SUBCONNECTOR_DisplayPort, "DP" }, /* DP */
1051 : { DRM_MODE_SUBCONNECTOR_Wireless, "Wireless" }, /* DP */
1052 : { DRM_MODE_SUBCONNECTOR_Native, "Native" }, /* DP */
1053 : };
1054 :
1055 0 : DRM_ENUM_NAME_FN(drm_get_dp_subconnector_name,
1056 : drm_dp_subconnector_enum_list)
1057 :
1058 :
1059 : static const char * const colorspace_names[] = {
1060 : /* For Default case, driver will set the colorspace */
1061 : [DRM_MODE_COLORIMETRY_DEFAULT] = "Default",
1062 : /* Standard Definition Colorimetry based on CEA 861 */
1063 : [DRM_MODE_COLORIMETRY_SMPTE_170M_YCC] = "SMPTE_170M_YCC",
1064 : [DRM_MODE_COLORIMETRY_BT709_YCC] = "BT709_YCC",
1065 : /* Standard Definition Colorimetry based on IEC 61966-2-4 */
1066 : [DRM_MODE_COLORIMETRY_XVYCC_601] = "XVYCC_601",
1067 : /* High Definition Colorimetry based on IEC 61966-2-4 */
1068 : [DRM_MODE_COLORIMETRY_XVYCC_709] = "XVYCC_709",
1069 : /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
1070 : [DRM_MODE_COLORIMETRY_SYCC_601] = "SYCC_601",
1071 : /* Colorimetry based on IEC 61966-2-5 [33] */
1072 : [DRM_MODE_COLORIMETRY_OPYCC_601] = "opYCC_601",
1073 : /* Colorimetry based on IEC 61966-2-5 */
1074 : [DRM_MODE_COLORIMETRY_OPRGB] = "opRGB",
1075 : /* Colorimetry based on ITU-R BT.2020 */
1076 : [DRM_MODE_COLORIMETRY_BT2020_CYCC] = "BT2020_CYCC",
1077 : /* Colorimetry based on ITU-R BT.2020 */
1078 : [DRM_MODE_COLORIMETRY_BT2020_RGB] = "BT2020_RGB",
1079 : /* Colorimetry based on ITU-R BT.2020 */
1080 : [DRM_MODE_COLORIMETRY_BT2020_YCC] = "BT2020_YCC",
1081 : /* Added as part of Additional Colorimetry Extension in 861.G */
1082 : [DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65] = "DCI-P3_RGB_D65",
1083 : [DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER] = "DCI-P3_RGB_Theater",
1084 : [DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED] = "RGB_WIDE_FIXED",
1085 : /* Colorimetry based on scRGB (IEC 61966-2-2) */
1086 : [DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT] = "RGB_WIDE_FLOAT",
1087 : [DRM_MODE_COLORIMETRY_BT601_YCC] = "BT601_YCC",
1088 : };
1089 :
1090 : /**
1091 : * drm_get_colorspace_name - return a string for color encoding
1092 : * @colorspace: color space to compute name of
1093 : *
1094 : * In contrast to the other drm_get_*_name functions this one here returns a
1095 : * const pointer and hence is threadsafe.
1096 : */
1097 0 : const char *drm_get_colorspace_name(enum drm_colorspace colorspace)
1098 : {
1099 0 : if (colorspace < ARRAY_SIZE(colorspace_names) && colorspace_names[colorspace])
1100 0 : return colorspace_names[colorspace];
1101 : else
1102 : return "(null)";
1103 : }
1104 :
1105 : static const u32 hdmi_colorspaces =
1106 : BIT(DRM_MODE_COLORIMETRY_SMPTE_170M_YCC) |
1107 : BIT(DRM_MODE_COLORIMETRY_BT709_YCC) |
1108 : BIT(DRM_MODE_COLORIMETRY_XVYCC_601) |
1109 : BIT(DRM_MODE_COLORIMETRY_XVYCC_709) |
1110 : BIT(DRM_MODE_COLORIMETRY_SYCC_601) |
1111 : BIT(DRM_MODE_COLORIMETRY_OPYCC_601) |
1112 : BIT(DRM_MODE_COLORIMETRY_OPRGB) |
1113 : BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) |
1114 : BIT(DRM_MODE_COLORIMETRY_BT2020_RGB) |
1115 : BIT(DRM_MODE_COLORIMETRY_BT2020_YCC) |
1116 : BIT(DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65) |
1117 : BIT(DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER);
1118 :
1119 : /*
1120 : * As per DP 1.4a spec, 2.2.5.7.5 VSC SDP Payload for Pixel Encoding/Colorimetry
1121 : * Format Table 2-120
1122 : */
1123 : static const u32 dp_colorspaces =
1124 : BIT(DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED) |
1125 : BIT(DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT) |
1126 : BIT(DRM_MODE_COLORIMETRY_OPRGB) |
1127 : BIT(DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65) |
1128 : BIT(DRM_MODE_COLORIMETRY_BT2020_RGB) |
1129 : BIT(DRM_MODE_COLORIMETRY_BT601_YCC) |
1130 : BIT(DRM_MODE_COLORIMETRY_BT709_YCC) |
1131 : BIT(DRM_MODE_COLORIMETRY_XVYCC_601) |
1132 : BIT(DRM_MODE_COLORIMETRY_XVYCC_709) |
1133 : BIT(DRM_MODE_COLORIMETRY_SYCC_601) |
1134 : BIT(DRM_MODE_COLORIMETRY_OPYCC_601) |
1135 : BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) |
1136 : BIT(DRM_MODE_COLORIMETRY_BT2020_YCC);
1137 :
1138 : /**
1139 : * DOC: standard connector properties
1140 : *
1141 : * DRM connectors have a few standardized properties:
1142 : *
1143 : * EDID:
1144 : * Blob property which contains the current EDID read from the sink. This
1145 : * is useful to parse sink identification information like vendor, model
1146 : * and serial. Drivers should update this property by calling
1147 : * drm_connector_update_edid_property(), usually after having parsed
1148 : * the EDID using drm_add_edid_modes(). Userspace cannot change this
1149 : * property.
1150 : *
1151 : * User-space should not parse the EDID to obtain information exposed via
1152 : * other KMS properties (because the kernel might apply limits, quirks or
1153 : * fixups to the EDID). For instance, user-space should not try to parse
1154 : * mode lists from the EDID.
1155 : * DPMS:
1156 : * Legacy property for setting the power state of the connector. For atomic
1157 : * drivers this is only provided for backwards compatibility with existing
1158 : * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
1159 : * connector is linked to. Drivers should never set this property directly,
1160 : * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
1161 : * callback. For atomic drivers the remapping to the "ACTIVE" property is
1162 : * implemented in the DRM core.
1163 : *
1164 : * Note that this property cannot be set through the MODE_ATOMIC ioctl,
1165 : * userspace must use "ACTIVE" on the CRTC instead.
1166 : *
1167 : * WARNING:
1168 : *
1169 : * For userspace also running on legacy drivers the "DPMS" semantics are a
1170 : * lot more complicated. First, userspace cannot rely on the "DPMS" value
1171 : * returned by the GETCONNECTOR actually reflecting reality, because many
1172 : * drivers fail to update it. For atomic drivers this is taken care of in
1173 : * drm_atomic_helper_update_legacy_modeset_state().
1174 : *
1175 : * The second issue is that the DPMS state is only well-defined when the
1176 : * connector is connected to a CRTC. In atomic the DRM core enforces that
1177 : * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
1178 : *
1179 : * Finally, when enabling an output using the legacy SETCONFIG ioctl then
1180 : * "DPMS" is forced to ON. But see above, that might not be reflected in
1181 : * the software value on legacy drivers.
1182 : *
1183 : * Summarizing: Only set "DPMS" when the connector is known to be enabled,
1184 : * assume that a successful SETCONFIG call also sets "DPMS" to on, and
1185 : * never read back the value of "DPMS" because it can be incorrect.
1186 : * PATH:
1187 : * Connector path property to identify how this sink is physically
1188 : * connected. Used by DP MST. This should be set by calling
1189 : * drm_connector_set_path_property(), in the case of DP MST with the
1190 : * path property the MST manager created. Userspace cannot change this
1191 : * property.
1192 : * TILE:
1193 : * Connector tile group property to indicate how a set of DRM connector
1194 : * compose together into one logical screen. This is used by both high-res
1195 : * external screens (often only using a single cable, but exposing multiple
1196 : * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
1197 : * are not gen-locked. Note that for tiled panels which are genlocked, like
1198 : * dual-link LVDS or dual-link DSI, the driver should try to not expose the
1199 : * tiling and virtualise both &drm_crtc and &drm_plane if needed. Drivers
1200 : * should update this value using drm_connector_set_tile_property().
1201 : * Userspace cannot change this property.
1202 : * link-status:
1203 : * Connector link-status property to indicate the status of link. The
1204 : * default value of link-status is "GOOD". If something fails during or
1205 : * after modeset, the kernel driver may set this to "BAD" and issue a
1206 : * hotplug uevent. Drivers should update this value using
1207 : * drm_connector_set_link_status_property().
1208 : *
1209 : * When user-space receives the hotplug uevent and detects a "BAD"
1210 : * link-status, the sink doesn't receive pixels anymore (e.g. the screen
1211 : * becomes completely black). The list of available modes may have
1212 : * changed. User-space is expected to pick a new mode if the current one
1213 : * has disappeared and perform a new modeset with link-status set to
1214 : * "GOOD" to re-enable the connector.
1215 : *
1216 : * If multiple connectors share the same CRTC and one of them gets a "BAD"
1217 : * link-status, the other are unaffected (ie. the sinks still continue to
1218 : * receive pixels).
1219 : *
1220 : * When user-space performs an atomic commit on a connector with a "BAD"
1221 : * link-status without resetting the property to "GOOD", the sink may
1222 : * still not receive pixels. When user-space performs an atomic commit
1223 : * which resets the link-status property to "GOOD" without the
1224 : * ALLOW_MODESET flag set, it might fail because a modeset is required.
1225 : *
1226 : * User-space can only change link-status to "GOOD", changing it to "BAD"
1227 : * is a no-op.
1228 : *
1229 : * For backwards compatibility with non-atomic userspace the kernel
1230 : * tries to automatically set the link-status back to "GOOD" in the
1231 : * SETCRTC IOCTL. This might fail if the mode is no longer valid, similar
1232 : * to how it might fail if a different screen has been connected in the
1233 : * interim.
1234 : * non_desktop:
1235 : * Indicates the output should be ignored for purposes of displaying a
1236 : * standard desktop environment or console. This is most likely because
1237 : * the output device is not rectilinear.
1238 : * Content Protection:
1239 : * This property is used by userspace to request the kernel protect future
1240 : * content communicated over the link. When requested, kernel will apply
1241 : * the appropriate means of protection (most often HDCP), and use the
1242 : * property to tell userspace the protection is active.
1243 : *
1244 : * Drivers can set this up by calling
1245 : * drm_connector_attach_content_protection_property() on initialization.
1246 : *
1247 : * The value of this property can be one of the following:
1248 : *
1249 : * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
1250 : * The link is not protected, content is transmitted in the clear.
1251 : * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
1252 : * Userspace has requested content protection, but the link is not
1253 : * currently protected. When in this state, kernel should enable
1254 : * Content Protection as soon as possible.
1255 : * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
1256 : * Userspace has requested content protection, and the link is
1257 : * protected. Only the driver can set the property to this value.
1258 : * If userspace attempts to set to ENABLED, kernel will return
1259 : * -EINVAL.
1260 : *
1261 : * A few guidelines:
1262 : *
1263 : * - DESIRED state should be preserved until userspace de-asserts it by
1264 : * setting the property to UNDESIRED. This means ENABLED should only
1265 : * transition to UNDESIRED when the user explicitly requests it.
1266 : * - If the state is DESIRED, kernel should attempt to re-authenticate the
1267 : * link whenever possible. This includes across disable/enable, dpms,
1268 : * hotplug, downstream device changes, link status failures, etc..
1269 : * - Kernel sends uevent with the connector id and property id through
1270 : * @drm_hdcp_update_content_protection, upon below kernel triggered
1271 : * scenarios:
1272 : *
1273 : * - DESIRED -> ENABLED (authentication success)
1274 : * - ENABLED -> DESIRED (termination of authentication)
1275 : * - Please note no uevents for userspace triggered property state changes,
1276 : * which can't fail such as
1277 : *
1278 : * - DESIRED/ENABLED -> UNDESIRED
1279 : * - UNDESIRED -> DESIRED
1280 : * - Userspace is responsible for polling the property or listen to uevents
1281 : * to determine when the value transitions from ENABLED to DESIRED.
1282 : * This signifies the link is no longer protected and userspace should
1283 : * take appropriate action (whatever that might be).
1284 : *
1285 : * HDCP Content Type:
1286 : * This Enum property is used by the userspace to declare the content type
1287 : * of the display stream, to kernel. Here display stream stands for any
1288 : * display content that userspace intended to display through HDCP
1289 : * encryption.
1290 : *
1291 : * Content Type of a stream is decided by the owner of the stream, as
1292 : * "HDCP Type0" or "HDCP Type1".
1293 : *
1294 : * The value of the property can be one of the below:
1295 : * - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0
1296 : * - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1
1297 : *
1298 : * When kernel starts the HDCP authentication (see "Content Protection"
1299 : * for details), it uses the content type in "HDCP Content Type"
1300 : * for performing the HDCP authentication with the display sink.
1301 : *
1302 : * Please note in HDCP spec versions, a link can be authenticated with
1303 : * HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be
1304 : * authenticated with HDCP1.4 only for Content Type 0(though it is implicit
1305 : * in nature. As there is no reference for Content Type in HDCP1.4).
1306 : *
1307 : * HDCP2.2 authentication protocol itself takes the "Content Type" as a
1308 : * parameter, which is a input for the DP HDCP2.2 encryption algo.
1309 : *
1310 : * In case of Type 0 content protection request, kernel driver can choose
1311 : * either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for
1312 : * "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send
1313 : * that content to a HDCP 1.4 authenticated HDCP sink (Type0 link).
1314 : * But if the content is classified as "HDCP Type 1", above mentioned
1315 : * HDCP 2.2 repeater wont send the content to the HDCP sink as it can't
1316 : * authenticate the HDCP1.4 capable sink for "HDCP Type 1".
1317 : *
1318 : * Please note userspace can be ignorant of the HDCP versions used by the
1319 : * kernel driver to achieve the "HDCP Content Type".
1320 : *
1321 : * At current scenario, classifying a content as Type 1 ensures that the
1322 : * content will be displayed only through the HDCP2.2 encrypted link.
1323 : *
1324 : * Note that the HDCP Content Type property is introduced at HDCP 2.2, and
1325 : * defaults to type 0. It is only exposed by drivers supporting HDCP 2.2
1326 : * (hence supporting Type 0 and Type 1). Based on how next versions of
1327 : * HDCP specs are defined content Type could be used for higher versions
1328 : * too.
1329 : *
1330 : * If content type is changed when "Content Protection" is not UNDESIRED,
1331 : * then kernel will disable the HDCP and re-enable with new type in the
1332 : * same atomic commit. And when "Content Protection" is ENABLED, it means
1333 : * that link is HDCP authenticated and encrypted, for the transmission of
1334 : * the Type of stream mentioned at "HDCP Content Type".
1335 : *
1336 : * HDR_OUTPUT_METADATA:
1337 : * Connector property to enable userspace to send HDR Metadata to
1338 : * driver. This metadata is based on the composition and blending
1339 : * policies decided by user, taking into account the hardware and
1340 : * sink capabilities. The driver gets this metadata and creates a
1341 : * Dynamic Range and Mastering Infoframe (DRM) in case of HDMI,
1342 : * SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then
1343 : * sent to sink. This notifies the sink of the upcoming frame's Color
1344 : * Encoding and Luminance parameters.
1345 : *
1346 : * Userspace first need to detect the HDR capabilities of sink by
1347 : * reading and parsing the EDID. Details of HDR metadata for HDMI
1348 : * are added in CTA 861.G spec. For DP , its defined in VESA DP
1349 : * Standard v1.4. It needs to then get the metadata information
1350 : * of the video/game/app content which are encoded in HDR (basically
1351 : * using HDR transfer functions). With this information it needs to
1352 : * decide on a blending policy and compose the relevant
1353 : * layers/overlays into a common format. Once this blending is done,
1354 : * userspace will be aware of the metadata of the composed frame to
1355 : * be send to sink. It then uses this property to communicate this
1356 : * metadata to driver which then make a Infoframe packet and sends
1357 : * to sink based on the type of encoder connected.
1358 : *
1359 : * Userspace will be responsible to do Tone mapping operation in case:
1360 : * - Some layers are HDR and others are SDR
1361 : * - HDR layers luminance is not same as sink
1362 : *
1363 : * It will even need to do colorspace conversion and get all layers
1364 : * to one common colorspace for blending. It can use either GL, Media
1365 : * or display engine to get this done based on the capabilities of the
1366 : * associated hardware.
1367 : *
1368 : * Driver expects metadata to be put in &struct hdr_output_metadata
1369 : * structure from userspace. This is received as blob and stored in
1370 : * &drm_connector_state.hdr_output_metadata. It parses EDID and saves the
1371 : * sink metadata in &struct hdr_sink_metadata, as
1372 : * &drm_connector.hdr_sink_metadata. Driver uses
1373 : * drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata,
1374 : * hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of
1375 : * HDMI encoder.
1376 : *
1377 : * max bpc:
1378 : * This range property is used by userspace to limit the bit depth. When
1379 : * used the driver would limit the bpc in accordance with the valid range
1380 : * supported by the hardware and sink. Drivers to use the function
1381 : * drm_connector_attach_max_bpc_property() to create and attach the
1382 : * property to the connector during initialization.
1383 : *
1384 : * Connectors also have one standardized atomic property:
1385 : *
1386 : * CRTC_ID:
1387 : * Mode object ID of the &drm_crtc this connector should be connected to.
1388 : *
1389 : * Connectors for LCD panels may also have one standardized property:
1390 : *
1391 : * panel orientation:
1392 : * On some devices the LCD panel is mounted in the casing in such a way
1393 : * that the up/top side of the panel does not match with the top side of
1394 : * the device. Userspace can use this property to check for this.
1395 : * Note that input coordinates from touchscreens (input devices with
1396 : * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
1397 : * coordinates, so if userspace rotates the picture to adjust for
1398 : * the orientation it must also apply the same transformation to the
1399 : * touchscreen input coordinates. This property is initialized by calling
1400 : * drm_connector_set_panel_orientation() or
1401 : * drm_connector_set_panel_orientation_with_quirk()
1402 : *
1403 : * scaling mode:
1404 : * This property defines how a non-native mode is upscaled to the native
1405 : * mode of an LCD panel:
1406 : *
1407 : * None:
1408 : * No upscaling happens, scaling is left to the panel. Not all
1409 : * drivers expose this mode.
1410 : * Full:
1411 : * The output is upscaled to the full resolution of the panel,
1412 : * ignoring the aspect ratio.
1413 : * Center:
1414 : * No upscaling happens, the output is centered within the native
1415 : * resolution the panel.
1416 : * Full aspect:
1417 : * The output is upscaled to maximize either the width or height
1418 : * while retaining the aspect ratio.
1419 : *
1420 : * This property should be set up by calling
1421 : * drm_connector_attach_scaling_mode_property(). Note that drivers
1422 : * can also expose this property to external outputs, in which case they
1423 : * must support "None", which should be the default (since external screens
1424 : * have a built-in scaler).
1425 : *
1426 : * subconnector:
1427 : * This property is used by DVI-I, TVout and DisplayPort to indicate different
1428 : * connector subtypes. Enum values more or less match with those from main
1429 : * connector types.
1430 : * For DVI-I and TVout there is also a matching property "select subconnector"
1431 : * allowing to switch between signal types.
1432 : * DP subconnector corresponds to a downstream port.
1433 : *
1434 : * privacy-screen sw-state, privacy-screen hw-state:
1435 : * These 2 optional properties can be used to query the state of the
1436 : * electronic privacy screen that is available on some displays; and in
1437 : * some cases also control the state. If a driver implements these
1438 : * properties then both properties must be present.
1439 : *
1440 : * "privacy-screen hw-state" is read-only and reflects the actual state
1441 : * of the privacy-screen, possible values: "Enabled", "Disabled,
1442 : * "Enabled-locked", "Disabled-locked". The locked states indicate
1443 : * that the state cannot be changed through the DRM API. E.g. there
1444 : * might be devices where the firmware-setup options, or a hardware
1445 : * slider-switch, offer always on / off modes.
1446 : *
1447 : * "privacy-screen sw-state" can be set to change the privacy-screen state
1448 : * when not locked. In this case the driver must update the hw-state
1449 : * property to reflect the new state on completion of the commit of the
1450 : * sw-state property. Setting the sw-state property when the hw-state is
1451 : * locked must be interpreted by the driver as a request to change the
1452 : * state to the set state when the hw-state becomes unlocked. E.g. if
1453 : * "privacy-screen hw-state" is "Enabled-locked" and the sw-state
1454 : * gets set to "Disabled" followed by the user unlocking the state by
1455 : * changing the slider-switch position, then the driver must set the
1456 : * state to "Disabled" upon receiving the unlock event.
1457 : *
1458 : * In some cases the privacy-screen's actual state might change outside of
1459 : * control of the DRM code. E.g. there might be a firmware handled hotkey
1460 : * which toggles the actual state, or the actual state might be changed
1461 : * through another userspace API such as writing /proc/acpi/ibm/lcdshadow.
1462 : * In this case the driver must update both the hw-state and the sw-state
1463 : * to reflect the new value, overwriting any pending state requests in the
1464 : * sw-state. Any pending sw-state requests are thus discarded.
1465 : *
1466 : * Note that the ability for the state to change outside of control of
1467 : * the DRM master process means that userspace must not cache the value
1468 : * of the sw-state. Caching the sw-state value and including it in later
1469 : * atomic commits may lead to overriding a state change done through e.g.
1470 : * a firmware handled hotkey. Therefor userspace must not include the
1471 : * privacy-screen sw-state in an atomic commit unless it wants to change
1472 : * its value.
1473 : *
1474 : * left margin, right margin, top margin, bottom margin:
1475 : * Add margins to the connector's viewport. This is typically used to
1476 : * mitigate overscan on TVs.
1477 : *
1478 : * The value is the size in pixels of the black border which will be
1479 : * added. The attached CRTC's content will be scaled to fill the whole
1480 : * area inside the margin.
1481 : *
1482 : * The margins configuration might be sent to the sink, e.g. via HDMI AVI
1483 : * InfoFrames.
1484 : *
1485 : * Drivers can set up these properties by calling
1486 : * drm_mode_create_tv_margin_properties().
1487 : */
1488 :
1489 5 : int drm_connector_create_standard_properties(struct drm_device *dev)
1490 : {
1491 : struct drm_property *prop;
1492 :
1493 5 : prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1494 : DRM_MODE_PROP_IMMUTABLE,
1495 : "EDID", 0);
1496 5 : if (!prop)
1497 : return -ENOMEM;
1498 5 : dev->mode_config.edid_property = prop;
1499 :
1500 5 : prop = drm_property_create_enum(dev, 0,
1501 : "DPMS", drm_dpms_enum_list,
1502 : ARRAY_SIZE(drm_dpms_enum_list));
1503 5 : if (!prop)
1504 : return -ENOMEM;
1505 5 : dev->mode_config.dpms_property = prop;
1506 :
1507 5 : prop = drm_property_create(dev,
1508 : DRM_MODE_PROP_BLOB |
1509 : DRM_MODE_PROP_IMMUTABLE,
1510 : "PATH", 0);
1511 5 : if (!prop)
1512 : return -ENOMEM;
1513 5 : dev->mode_config.path_property = prop;
1514 :
1515 5 : prop = drm_property_create(dev,
1516 : DRM_MODE_PROP_BLOB |
1517 : DRM_MODE_PROP_IMMUTABLE,
1518 : "TILE", 0);
1519 5 : if (!prop)
1520 : return -ENOMEM;
1521 5 : dev->mode_config.tile_property = prop;
1522 :
1523 5 : prop = drm_property_create_enum(dev, 0, "link-status",
1524 : drm_link_status_enum_list,
1525 : ARRAY_SIZE(drm_link_status_enum_list));
1526 5 : if (!prop)
1527 : return -ENOMEM;
1528 5 : dev->mode_config.link_status_property = prop;
1529 :
1530 5 : prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
1531 5 : if (!prop)
1532 : return -ENOMEM;
1533 5 : dev->mode_config.non_desktop_property = prop;
1534 :
1535 5 : prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
1536 : "HDR_OUTPUT_METADATA", 0);
1537 5 : if (!prop)
1538 : return -ENOMEM;
1539 5 : dev->mode_config.hdr_output_metadata_property = prop;
1540 :
1541 5 : return 0;
1542 : }
1543 :
1544 : /**
1545 : * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1546 : * @dev: DRM device
1547 : *
1548 : * Called by a driver the first time a DVI-I connector is made.
1549 : *
1550 : * Returns: %0
1551 : */
1552 0 : int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1553 : {
1554 : struct drm_property *dvi_i_selector;
1555 : struct drm_property *dvi_i_subconnector;
1556 :
1557 0 : if (dev->mode_config.dvi_i_select_subconnector_property)
1558 : return 0;
1559 :
1560 0 : dvi_i_selector =
1561 : drm_property_create_enum(dev, 0,
1562 : "select subconnector",
1563 : drm_dvi_i_select_enum_list,
1564 : ARRAY_SIZE(drm_dvi_i_select_enum_list));
1565 0 : dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1566 :
1567 0 : dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1568 : "subconnector",
1569 : drm_dvi_i_subconnector_enum_list,
1570 : ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1571 0 : dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1572 :
1573 0 : return 0;
1574 : }
1575 : EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1576 :
1577 : /**
1578 : * drm_connector_attach_dp_subconnector_property - create subconnector property for DP
1579 : * @connector: drm_connector to attach property
1580 : *
1581 : * Called by a driver when DP connector is created.
1582 : */
1583 0 : void drm_connector_attach_dp_subconnector_property(struct drm_connector *connector)
1584 : {
1585 0 : struct drm_mode_config *mode_config = &connector->dev->mode_config;
1586 :
1587 0 : if (!mode_config->dp_subconnector_property)
1588 0 : mode_config->dp_subconnector_property =
1589 0 : drm_property_create_enum(connector->dev,
1590 : DRM_MODE_PROP_IMMUTABLE,
1591 : "subconnector",
1592 : drm_dp_subconnector_enum_list,
1593 : ARRAY_SIZE(drm_dp_subconnector_enum_list));
1594 :
1595 0 : drm_object_attach_property(&connector->base,
1596 : mode_config->dp_subconnector_property,
1597 : DRM_MODE_SUBCONNECTOR_Unknown);
1598 0 : }
1599 : EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property);
1600 :
1601 : /**
1602 : * DOC: HDMI connector properties
1603 : *
1604 : * content type (HDMI specific):
1605 : * Indicates content type setting to be used in HDMI infoframes to indicate
1606 : * content type for the external device, so that it adjusts its display
1607 : * settings accordingly.
1608 : *
1609 : * The value of this property can be one of the following:
1610 : *
1611 : * No Data:
1612 : * Content type is unknown
1613 : * Graphics:
1614 : * Content type is graphics
1615 : * Photo:
1616 : * Content type is photo
1617 : * Cinema:
1618 : * Content type is cinema
1619 : * Game:
1620 : * Content type is game
1621 : *
1622 : * The meaning of each content type is defined in CTA-861-G table 15.
1623 : *
1624 : * Drivers can set up this property by calling
1625 : * drm_connector_attach_content_type_property(). Decoding to
1626 : * infoframe values is done through drm_hdmi_avi_infoframe_content_type().
1627 : */
1628 :
1629 : /*
1630 : * TODO: Document the properties:
1631 : * - brightness
1632 : * - contrast
1633 : * - flicker reduction
1634 : * - hue
1635 : * - mode
1636 : * - overscan
1637 : * - saturation
1638 : * - select subconnector
1639 : */
1640 : /**
1641 : * DOC: Analog TV Connector Properties
1642 : *
1643 : * TV Mode:
1644 : * Indicates the TV Mode used on an analog TV connector. The value
1645 : * of this property can be one of the following:
1646 : *
1647 : * NTSC:
1648 : * TV Mode is CCIR System M (aka 525-lines) together with
1649 : * the NTSC Color Encoding.
1650 : *
1651 : * NTSC-443:
1652 : *
1653 : * TV Mode is CCIR System M (aka 525-lines) together with
1654 : * the NTSC Color Encoding, but with a color subcarrier
1655 : * frequency of 4.43MHz
1656 : *
1657 : * NTSC-J:
1658 : *
1659 : * TV Mode is CCIR System M (aka 525-lines) together with
1660 : * the NTSC Color Encoding, but with a black level equal to
1661 : * the blanking level.
1662 : *
1663 : * PAL:
1664 : *
1665 : * TV Mode is CCIR System B (aka 625-lines) together with
1666 : * the PAL Color Encoding.
1667 : *
1668 : * PAL-M:
1669 : *
1670 : * TV Mode is CCIR System M (aka 525-lines) together with
1671 : * the PAL Color Encoding.
1672 : *
1673 : * PAL-N:
1674 : *
1675 : * TV Mode is CCIR System N together with the PAL Color
1676 : * Encoding, a color subcarrier frequency of 3.58MHz, the
1677 : * SECAM color space, and narrower channels than other PAL
1678 : * variants.
1679 : *
1680 : * SECAM:
1681 : *
1682 : * TV Mode is CCIR System B (aka 625-lines) together with
1683 : * the SECAM Color Encoding.
1684 : *
1685 : * Drivers can set up this property by calling
1686 : * drm_mode_create_tv_properties().
1687 : */
1688 :
1689 : /**
1690 : * drm_connector_attach_content_type_property - attach content-type property
1691 : * @connector: connector to attach content type property on.
1692 : *
1693 : * Called by a driver the first time a HDMI connector is made.
1694 : *
1695 : * Returns: %0
1696 : */
1697 0 : int drm_connector_attach_content_type_property(struct drm_connector *connector)
1698 : {
1699 0 : if (!drm_mode_create_content_type_property(connector->dev))
1700 0 : drm_object_attach_property(&connector->base,
1701 0 : connector->dev->mode_config.content_type_property,
1702 : DRM_MODE_CONTENT_TYPE_NO_DATA);
1703 0 : return 0;
1704 : }
1705 : EXPORT_SYMBOL(drm_connector_attach_content_type_property);
1706 :
1707 : /**
1708 : * drm_connector_attach_tv_margin_properties - attach TV connector margin
1709 : * properties
1710 : * @connector: DRM connector
1711 : *
1712 : * Called by a driver when it needs to attach TV margin props to a connector.
1713 : * Typically used on SDTV and HDMI connectors.
1714 : */
1715 0 : void drm_connector_attach_tv_margin_properties(struct drm_connector *connector)
1716 : {
1717 0 : struct drm_device *dev = connector->dev;
1718 :
1719 0 : drm_object_attach_property(&connector->base,
1720 : dev->mode_config.tv_left_margin_property,
1721 : 0);
1722 0 : drm_object_attach_property(&connector->base,
1723 : dev->mode_config.tv_right_margin_property,
1724 : 0);
1725 0 : drm_object_attach_property(&connector->base,
1726 : dev->mode_config.tv_top_margin_property,
1727 : 0);
1728 0 : drm_object_attach_property(&connector->base,
1729 : dev->mode_config.tv_bottom_margin_property,
1730 : 0);
1731 0 : }
1732 : EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties);
1733 :
1734 : /**
1735 : * drm_mode_create_tv_margin_properties - create TV connector margin properties
1736 : * @dev: DRM device
1737 : *
1738 : * Called by a driver's HDMI connector initialization routine, this function
1739 : * creates the TV margin properties for a given device. No need to call this
1740 : * function for an SDTV connector, it's already called from
1741 : * drm_mode_create_tv_properties_legacy().
1742 : *
1743 : * Returns:
1744 : * 0 on success or a negative error code on failure.
1745 : */
1746 0 : int drm_mode_create_tv_margin_properties(struct drm_device *dev)
1747 : {
1748 0 : if (dev->mode_config.tv_left_margin_property)
1749 : return 0;
1750 :
1751 0 : dev->mode_config.tv_left_margin_property =
1752 0 : drm_property_create_range(dev, 0, "left margin", 0, 100);
1753 0 : if (!dev->mode_config.tv_left_margin_property)
1754 : return -ENOMEM;
1755 :
1756 0 : dev->mode_config.tv_right_margin_property =
1757 0 : drm_property_create_range(dev, 0, "right margin", 0, 100);
1758 0 : if (!dev->mode_config.tv_right_margin_property)
1759 : return -ENOMEM;
1760 :
1761 0 : dev->mode_config.tv_top_margin_property =
1762 0 : drm_property_create_range(dev, 0, "top margin", 0, 100);
1763 0 : if (!dev->mode_config.tv_top_margin_property)
1764 : return -ENOMEM;
1765 :
1766 0 : dev->mode_config.tv_bottom_margin_property =
1767 0 : drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1768 0 : if (!dev->mode_config.tv_bottom_margin_property)
1769 : return -ENOMEM;
1770 :
1771 0 : return 0;
1772 : }
1773 : EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
1774 :
1775 : /**
1776 : * drm_mode_create_tv_properties_legacy - create TV specific connector properties
1777 : * @dev: DRM device
1778 : * @num_modes: number of different TV formats (modes) supported
1779 : * @modes: array of pointers to strings containing name of each format
1780 : *
1781 : * Called by a driver's TV initialization routine, this function creates
1782 : * the TV specific connector properties for a given device. Caller is
1783 : * responsible for allocating a list of format names and passing them to
1784 : * this routine.
1785 : *
1786 : * NOTE: This functions registers the deprecated "mode" connector
1787 : * property to select the analog TV mode (ie, NTSC, PAL, etc.). New
1788 : * drivers must use drm_mode_create_tv_properties() instead.
1789 : *
1790 : * Returns:
1791 : * 0 on success or a negative error code on failure.
1792 : */
1793 0 : int drm_mode_create_tv_properties_legacy(struct drm_device *dev,
1794 : unsigned int num_modes,
1795 : const char * const modes[])
1796 : {
1797 : struct drm_property *tv_selector;
1798 : struct drm_property *tv_subconnector;
1799 : unsigned int i;
1800 :
1801 0 : if (dev->mode_config.tv_select_subconnector_property)
1802 : return 0;
1803 :
1804 : /*
1805 : * Basic connector properties
1806 : */
1807 0 : tv_selector = drm_property_create_enum(dev, 0,
1808 : "select subconnector",
1809 : drm_tv_select_enum_list,
1810 : ARRAY_SIZE(drm_tv_select_enum_list));
1811 0 : if (!tv_selector)
1812 : goto nomem;
1813 :
1814 0 : dev->mode_config.tv_select_subconnector_property = tv_selector;
1815 :
1816 0 : tv_subconnector =
1817 : drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1818 : "subconnector",
1819 : drm_tv_subconnector_enum_list,
1820 : ARRAY_SIZE(drm_tv_subconnector_enum_list));
1821 0 : if (!tv_subconnector)
1822 : goto nomem;
1823 0 : dev->mode_config.tv_subconnector_property = tv_subconnector;
1824 :
1825 : /*
1826 : * Other, TV specific properties: margins & TV modes.
1827 : */
1828 0 : if (drm_mode_create_tv_margin_properties(dev))
1829 : goto nomem;
1830 :
1831 0 : if (num_modes) {
1832 0 : dev->mode_config.legacy_tv_mode_property =
1833 0 : drm_property_create(dev, DRM_MODE_PROP_ENUM,
1834 : "mode", num_modes);
1835 0 : if (!dev->mode_config.legacy_tv_mode_property)
1836 : goto nomem;
1837 :
1838 0 : for (i = 0; i < num_modes; i++)
1839 0 : drm_property_add_enum(dev->mode_config.legacy_tv_mode_property,
1840 0 : i, modes[i]);
1841 : }
1842 :
1843 0 : dev->mode_config.tv_brightness_property =
1844 0 : drm_property_create_range(dev, 0, "brightness", 0, 100);
1845 0 : if (!dev->mode_config.tv_brightness_property)
1846 : goto nomem;
1847 :
1848 0 : dev->mode_config.tv_contrast_property =
1849 0 : drm_property_create_range(dev, 0, "contrast", 0, 100);
1850 0 : if (!dev->mode_config.tv_contrast_property)
1851 : goto nomem;
1852 :
1853 0 : dev->mode_config.tv_flicker_reduction_property =
1854 0 : drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1855 0 : if (!dev->mode_config.tv_flicker_reduction_property)
1856 : goto nomem;
1857 :
1858 0 : dev->mode_config.tv_overscan_property =
1859 0 : drm_property_create_range(dev, 0, "overscan", 0, 100);
1860 0 : if (!dev->mode_config.tv_overscan_property)
1861 : goto nomem;
1862 :
1863 0 : dev->mode_config.tv_saturation_property =
1864 0 : drm_property_create_range(dev, 0, "saturation", 0, 100);
1865 0 : if (!dev->mode_config.tv_saturation_property)
1866 : goto nomem;
1867 :
1868 0 : dev->mode_config.tv_hue_property =
1869 0 : drm_property_create_range(dev, 0, "hue", 0, 100);
1870 0 : if (!dev->mode_config.tv_hue_property)
1871 : goto nomem;
1872 :
1873 : return 0;
1874 : nomem:
1875 : return -ENOMEM;
1876 : }
1877 : EXPORT_SYMBOL(drm_mode_create_tv_properties_legacy);
1878 :
1879 : /**
1880 : * drm_mode_create_tv_properties - create TV specific connector properties
1881 : * @dev: DRM device
1882 : * @supported_tv_modes: Bitmask of TV modes supported (See DRM_MODE_TV_MODE_*)
1883 : *
1884 : * Called by a driver's TV initialization routine, this function creates
1885 : * the TV specific connector properties for a given device.
1886 : *
1887 : * Returns:
1888 : * 0 on success or a negative error code on failure.
1889 : */
1890 0 : int drm_mode_create_tv_properties(struct drm_device *dev,
1891 : unsigned int supported_tv_modes)
1892 : {
1893 : struct drm_prop_enum_list tv_mode_list[DRM_MODE_TV_MODE_MAX];
1894 : struct drm_property *tv_mode;
1895 0 : unsigned int i, len = 0;
1896 :
1897 0 : if (dev->mode_config.tv_mode_property)
1898 : return 0;
1899 :
1900 0 : for (i = 0; i < DRM_MODE_TV_MODE_MAX; i++) {
1901 0 : if (!(supported_tv_modes & BIT(i)))
1902 0 : continue;
1903 :
1904 0 : tv_mode_list[len].type = i;
1905 0 : tv_mode_list[len].name = drm_get_tv_mode_name(i);
1906 0 : len++;
1907 : }
1908 :
1909 0 : tv_mode = drm_property_create_enum(dev, 0, "TV mode",
1910 : tv_mode_list, len);
1911 0 : if (!tv_mode)
1912 : return -ENOMEM;
1913 :
1914 0 : dev->mode_config.tv_mode_property = tv_mode;
1915 :
1916 0 : return drm_mode_create_tv_properties_legacy(dev, 0, NULL);
1917 : }
1918 : EXPORT_SYMBOL(drm_mode_create_tv_properties);
1919 :
1920 : /**
1921 : * drm_mode_create_scaling_mode_property - create scaling mode property
1922 : * @dev: DRM device
1923 : *
1924 : * Called by a driver the first time it's needed, must be attached to desired
1925 : * connectors.
1926 : *
1927 : * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1928 : * instead to correctly assign &drm_connector_state.scaling_mode
1929 : * in the atomic state.
1930 : *
1931 : * Returns: %0
1932 : */
1933 0 : int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1934 : {
1935 : struct drm_property *scaling_mode;
1936 :
1937 0 : if (dev->mode_config.scaling_mode_property)
1938 : return 0;
1939 :
1940 0 : scaling_mode =
1941 : drm_property_create_enum(dev, 0, "scaling mode",
1942 : drm_scaling_mode_enum_list,
1943 : ARRAY_SIZE(drm_scaling_mode_enum_list));
1944 :
1945 0 : dev->mode_config.scaling_mode_property = scaling_mode;
1946 :
1947 0 : return 0;
1948 : }
1949 : EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1950 :
1951 : /**
1952 : * DOC: Variable refresh properties
1953 : *
1954 : * Variable refresh rate capable displays can dynamically adjust their
1955 : * refresh rate by extending the duration of their vertical front porch
1956 : * until page flip or timeout occurs. This can reduce or remove stuttering
1957 : * and latency in scenarios where the page flip does not align with the
1958 : * vblank interval.
1959 : *
1960 : * An example scenario would be an application flipping at a constant rate
1961 : * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank
1962 : * interval and the same contents will be displayed twice. This can be
1963 : * observed as stuttering for content with motion.
1964 : *
1965 : * If variable refresh rate was active on a display that supported a
1966 : * variable refresh range from 35Hz to 60Hz no stuttering would be observable
1967 : * for the example scenario. The minimum supported variable refresh rate of
1968 : * 35Hz is below the page flip frequency and the vertical front porch can
1969 : * be extended until the page flip occurs. The vblank interval will be
1970 : * directly aligned to the page flip rate.
1971 : *
1972 : * Not all userspace content is suitable for use with variable refresh rate.
1973 : * Large and frequent changes in vertical front porch duration may worsen
1974 : * perceived stuttering for input sensitive applications.
1975 : *
1976 : * Panel brightness will also vary with vertical front porch duration. Some
1977 : * panels may have noticeable differences in brightness between the minimum
1978 : * vertical front porch duration and the maximum vertical front porch duration.
1979 : * Large and frequent changes in vertical front porch duration may produce
1980 : * observable flickering for such panels.
1981 : *
1982 : * Userspace control for variable refresh rate is supported via properties
1983 : * on the &drm_connector and &drm_crtc objects.
1984 : *
1985 : * "vrr_capable":
1986 : * Optional &drm_connector boolean property that drivers should attach
1987 : * with drm_connector_attach_vrr_capable_property() on connectors that
1988 : * could support variable refresh rates. Drivers should update the
1989 : * property value by calling drm_connector_set_vrr_capable_property().
1990 : *
1991 : * Absence of the property should indicate absence of support.
1992 : *
1993 : * "VRR_ENABLED":
1994 : * Default &drm_crtc boolean property that notifies the driver that the
1995 : * content on the CRTC is suitable for variable refresh rate presentation.
1996 : * The driver will take this property as a hint to enable variable
1997 : * refresh rate support if the receiver supports it, ie. if the
1998 : * "vrr_capable" property is true on the &drm_connector object. The
1999 : * vertical front porch duration will be extended until page-flip or
2000 : * timeout when enabled.
2001 : *
2002 : * The minimum vertical front porch duration is defined as the vertical
2003 : * front porch duration for the current mode.
2004 : *
2005 : * The maximum vertical front porch duration is greater than or equal to
2006 : * the minimum vertical front porch duration. The duration is derived
2007 : * from the minimum supported variable refresh rate for the connector.
2008 : *
2009 : * The driver may place further restrictions within these minimum
2010 : * and maximum bounds.
2011 : */
2012 :
2013 : /**
2014 : * drm_connector_attach_vrr_capable_property - creates the
2015 : * vrr_capable property
2016 : * @connector: connector to create the vrr_capable property on.
2017 : *
2018 : * This is used by atomic drivers to add support for querying
2019 : * variable refresh rate capability for a connector.
2020 : *
2021 : * Returns:
2022 : * Zero on success, negative errno on failure.
2023 : */
2024 0 : int drm_connector_attach_vrr_capable_property(
2025 : struct drm_connector *connector)
2026 : {
2027 0 : struct drm_device *dev = connector->dev;
2028 : struct drm_property *prop;
2029 :
2030 0 : if (!connector->vrr_capable_property) {
2031 0 : prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE,
2032 : "vrr_capable");
2033 0 : if (!prop)
2034 : return -ENOMEM;
2035 :
2036 0 : connector->vrr_capable_property = prop;
2037 0 : drm_object_attach_property(&connector->base, prop, 0);
2038 : }
2039 :
2040 : return 0;
2041 : }
2042 : EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property);
2043 :
2044 : /**
2045 : * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
2046 : * @connector: connector to attach scaling mode property on.
2047 : * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
2048 : *
2049 : * This is used to add support for scaling mode to atomic drivers.
2050 : * The scaling mode will be set to &drm_connector_state.scaling_mode
2051 : * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
2052 : *
2053 : * This is the atomic version of drm_mode_create_scaling_mode_property().
2054 : *
2055 : * Returns:
2056 : * Zero on success, negative errno on failure.
2057 : */
2058 0 : int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
2059 : u32 scaling_mode_mask)
2060 : {
2061 0 : struct drm_device *dev = connector->dev;
2062 : struct drm_property *scaling_mode_property;
2063 : int i;
2064 0 : const unsigned valid_scaling_mode_mask =
2065 : (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
2066 :
2067 0 : if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
2068 : scaling_mode_mask & ~valid_scaling_mode_mask))
2069 : return -EINVAL;
2070 :
2071 0 : scaling_mode_property =
2072 0 : drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
2073 0 : hweight32(scaling_mode_mask));
2074 :
2075 0 : if (!scaling_mode_property)
2076 : return -ENOMEM;
2077 :
2078 0 : for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
2079 : int ret;
2080 :
2081 0 : if (!(BIT(i) & scaling_mode_mask))
2082 0 : continue;
2083 :
2084 0 : ret = drm_property_add_enum(scaling_mode_property,
2085 0 : drm_scaling_mode_enum_list[i].type,
2086 : drm_scaling_mode_enum_list[i].name);
2087 :
2088 0 : if (ret) {
2089 0 : drm_property_destroy(dev, scaling_mode_property);
2090 :
2091 0 : return ret;
2092 : }
2093 : }
2094 :
2095 0 : drm_object_attach_property(&connector->base,
2096 : scaling_mode_property, 0);
2097 :
2098 0 : connector->scaling_mode_property = scaling_mode_property;
2099 :
2100 0 : return 0;
2101 : }
2102 : EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
2103 :
2104 : /**
2105 : * drm_mode_create_aspect_ratio_property - create aspect ratio property
2106 : * @dev: DRM device
2107 : *
2108 : * Called by a driver the first time it's needed, must be attached to desired
2109 : * connectors.
2110 : *
2111 : * Returns:
2112 : * Zero on success, negative errno on failure.
2113 : */
2114 0 : int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
2115 : {
2116 0 : if (dev->mode_config.aspect_ratio_property)
2117 : return 0;
2118 :
2119 0 : dev->mode_config.aspect_ratio_property =
2120 0 : drm_property_create_enum(dev, 0, "aspect ratio",
2121 : drm_aspect_ratio_enum_list,
2122 : ARRAY_SIZE(drm_aspect_ratio_enum_list));
2123 :
2124 0 : if (dev->mode_config.aspect_ratio_property == NULL)
2125 : return -ENOMEM;
2126 :
2127 0 : return 0;
2128 : }
2129 : EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
2130 :
2131 : /**
2132 : * DOC: standard connector properties
2133 : *
2134 : * Colorspace:
2135 : * This property helps select a suitable colorspace based on the sink
2136 : * capability. Modern sink devices support wider gamut like BT2020.
2137 : * This helps switch to BT2020 mode if the BT2020 encoded video stream
2138 : * is being played by the user, same for any other colorspace. Thereby
2139 : * giving a good visual experience to users.
2140 : *
2141 : * The expectation from userspace is that it should parse the EDID
2142 : * and get supported colorspaces. Use this property and switch to the
2143 : * one supported. Sink supported colorspaces should be retrieved by
2144 : * userspace from EDID and driver will not explicitly expose them.
2145 : *
2146 : * Basically the expectation from userspace is:
2147 : * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
2148 : * colorspace
2149 : * - Set this new property to let the sink know what it
2150 : * converted the CRTC output to.
2151 : * - This property is just to inform sink what colorspace
2152 : * source is trying to drive.
2153 : *
2154 : * Because between HDMI and DP have different colorspaces,
2155 : * drm_mode_create_hdmi_colorspace_property() is used for HDMI connector and
2156 : * drm_mode_create_dp_colorspace_property() is used for DP connector.
2157 : */
2158 :
2159 0 : static int drm_mode_create_colorspace_property(struct drm_connector *connector,
2160 : u32 supported_colorspaces)
2161 : {
2162 0 : struct drm_device *dev = connector->dev;
2163 0 : u32 colorspaces = supported_colorspaces | BIT(DRM_MODE_COLORIMETRY_DEFAULT);
2164 : struct drm_prop_enum_list enum_list[DRM_MODE_COLORIMETRY_COUNT];
2165 : int i, len;
2166 :
2167 0 : if (connector->colorspace_property)
2168 : return 0;
2169 :
2170 0 : if (!supported_colorspaces) {
2171 0 : drm_err(dev, "No supported colorspaces provded on [CONNECTOR:%d:%s]\n",
2172 : connector->base.id, connector->name);
2173 0 : return -EINVAL;
2174 : }
2175 :
2176 0 : if ((supported_colorspaces & -BIT(DRM_MODE_COLORIMETRY_COUNT)) != 0) {
2177 0 : drm_err(dev, "Unknown colorspace provded on [CONNECTOR:%d:%s]\n",
2178 : connector->base.id, connector->name);
2179 0 : return -EINVAL;
2180 : }
2181 :
2182 : len = 0;
2183 0 : for (i = 0; i < DRM_MODE_COLORIMETRY_COUNT; i++) {
2184 0 : if ((colorspaces & BIT(i)) == 0)
2185 0 : continue;
2186 :
2187 0 : enum_list[len].type = i;
2188 0 : enum_list[len].name = colorspace_names[i];
2189 0 : len++;
2190 : }
2191 :
2192 0 : connector->colorspace_property =
2193 0 : drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
2194 : enum_list,
2195 : len);
2196 :
2197 0 : if (!connector->colorspace_property)
2198 : return -ENOMEM;
2199 :
2200 0 : return 0;
2201 : }
2202 :
2203 : /**
2204 : * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property
2205 : * @connector: connector to create the Colorspace property on.
2206 : *
2207 : * Called by a driver the first time it's needed, must be attached to desired
2208 : * HDMI connectors.
2209 : *
2210 : * Returns:
2211 : * Zero on success, negative errno on failure.
2212 : */
2213 0 : int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector,
2214 : u32 supported_colorspaces)
2215 : {
2216 : u32 colorspaces;
2217 :
2218 0 : if (supported_colorspaces)
2219 0 : colorspaces = supported_colorspaces & hdmi_colorspaces;
2220 : else
2221 : colorspaces = hdmi_colorspaces;
2222 :
2223 0 : return drm_mode_create_colorspace_property(connector, colorspaces);
2224 : }
2225 : EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property);
2226 :
2227 : /**
2228 : * drm_mode_create_dp_colorspace_property - create dp colorspace property
2229 : * @connector: connector to create the Colorspace property on.
2230 : *
2231 : * Called by a driver the first time it's needed, must be attached to desired
2232 : * DP connectors.
2233 : *
2234 : * Returns:
2235 : * Zero on success, negative errno on failure.
2236 : */
2237 0 : int drm_mode_create_dp_colorspace_property(struct drm_connector *connector,
2238 : u32 supported_colorspaces)
2239 : {
2240 : u32 colorspaces;
2241 :
2242 0 : if (supported_colorspaces)
2243 0 : colorspaces = supported_colorspaces & dp_colorspaces;
2244 : else
2245 : colorspaces = dp_colorspaces;
2246 :
2247 0 : return drm_mode_create_colorspace_property(connector, colorspaces);
2248 : }
2249 : EXPORT_SYMBOL(drm_mode_create_dp_colorspace_property);
2250 :
2251 : /**
2252 : * drm_mode_create_content_type_property - create content type property
2253 : * @dev: DRM device
2254 : *
2255 : * Called by a driver the first time it's needed, must be attached to desired
2256 : * connectors.
2257 : *
2258 : * Returns:
2259 : * Zero on success, negative errno on failure.
2260 : */
2261 0 : int drm_mode_create_content_type_property(struct drm_device *dev)
2262 : {
2263 0 : if (dev->mode_config.content_type_property)
2264 : return 0;
2265 :
2266 0 : dev->mode_config.content_type_property =
2267 0 : drm_property_create_enum(dev, 0, "content type",
2268 : drm_content_type_enum_list,
2269 : ARRAY_SIZE(drm_content_type_enum_list));
2270 :
2271 0 : if (dev->mode_config.content_type_property == NULL)
2272 : return -ENOMEM;
2273 :
2274 0 : return 0;
2275 : }
2276 : EXPORT_SYMBOL(drm_mode_create_content_type_property);
2277 :
2278 : /**
2279 : * drm_mode_create_suggested_offset_properties - create suggests offset properties
2280 : * @dev: DRM device
2281 : *
2282 : * Create the suggested x/y offset property for connectors.
2283 : *
2284 : * Returns:
2285 : * 0 on success or a negative error code on failure.
2286 : */
2287 0 : int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
2288 : {
2289 0 : if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
2290 : return 0;
2291 :
2292 0 : dev->mode_config.suggested_x_property =
2293 0 : drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
2294 :
2295 0 : dev->mode_config.suggested_y_property =
2296 0 : drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
2297 :
2298 0 : if (dev->mode_config.suggested_x_property == NULL ||
2299 : dev->mode_config.suggested_y_property == NULL)
2300 : return -ENOMEM;
2301 0 : return 0;
2302 : }
2303 : EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
2304 :
2305 : /**
2306 : * drm_connector_set_path_property - set tile property on connector
2307 : * @connector: connector to set property on.
2308 : * @path: path to use for property; must not be NULL.
2309 : *
2310 : * This creates a property to expose to userspace to specify a
2311 : * connector path. This is mainly used for DisplayPort MST where
2312 : * connectors have a topology and we want to allow userspace to give
2313 : * them more meaningful names.
2314 : *
2315 : * Returns:
2316 : * Zero on success, negative errno on failure.
2317 : */
2318 0 : int drm_connector_set_path_property(struct drm_connector *connector,
2319 : const char *path)
2320 : {
2321 0 : struct drm_device *dev = connector->dev;
2322 : int ret;
2323 :
2324 0 : ret = drm_property_replace_global_blob(dev,
2325 : &connector->path_blob_ptr,
2326 0 : strlen(path) + 1,
2327 : path,
2328 : &connector->base,
2329 : dev->mode_config.path_property);
2330 0 : return ret;
2331 : }
2332 : EXPORT_SYMBOL(drm_connector_set_path_property);
2333 :
2334 : /**
2335 : * drm_connector_set_tile_property - set tile property on connector
2336 : * @connector: connector to set property on.
2337 : *
2338 : * This looks up the tile information for a connector, and creates a
2339 : * property for userspace to parse if it exists. The property is of
2340 : * the form of 8 integers using ':' as a separator.
2341 : * This is used for dual port tiled displays with DisplayPort SST
2342 : * or DisplayPort MST connectors.
2343 : *
2344 : * Returns:
2345 : * Zero on success, errno on failure.
2346 : */
2347 0 : int drm_connector_set_tile_property(struct drm_connector *connector)
2348 : {
2349 0 : struct drm_device *dev = connector->dev;
2350 : char tile[256];
2351 : int ret;
2352 :
2353 0 : if (!connector->has_tile) {
2354 0 : ret = drm_property_replace_global_blob(dev,
2355 : &connector->tile_blob_ptr,
2356 : 0,
2357 : NULL,
2358 : &connector->base,
2359 : dev->mode_config.tile_property);
2360 0 : return ret;
2361 : }
2362 :
2363 0 : snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
2364 0 : connector->tile_group->id, connector->tile_is_single_monitor,
2365 0 : connector->num_h_tile, connector->num_v_tile,
2366 0 : connector->tile_h_loc, connector->tile_v_loc,
2367 0 : connector->tile_h_size, connector->tile_v_size);
2368 :
2369 0 : ret = drm_property_replace_global_blob(dev,
2370 : &connector->tile_blob_ptr,
2371 0 : strlen(tile) + 1,
2372 : tile,
2373 : &connector->base,
2374 : dev->mode_config.tile_property);
2375 0 : return ret;
2376 : }
2377 : EXPORT_SYMBOL(drm_connector_set_tile_property);
2378 :
2379 : /**
2380 : * drm_connector_set_link_status_property - Set link status property of a connector
2381 : * @connector: drm connector
2382 : * @link_status: new value of link status property (0: Good, 1: Bad)
2383 : *
2384 : * In usual working scenario, this link status property will always be set to
2385 : * "GOOD". If something fails during or after a mode set, the kernel driver
2386 : * may set this link status property to "BAD". The caller then needs to send a
2387 : * hotplug uevent for userspace to re-check the valid modes through
2388 : * GET_CONNECTOR_IOCTL and retry modeset.
2389 : *
2390 : * Note: Drivers cannot rely on userspace to support this property and
2391 : * issue a modeset. As such, they may choose to handle issues (like
2392 : * re-training a link) without userspace's intervention.
2393 : *
2394 : * The reason for adding this property is to handle link training failures, but
2395 : * it is not limited to DP or link training. For example, if we implement
2396 : * asynchronous setcrtc, this property can be used to report any failures in that.
2397 : */
2398 0 : void drm_connector_set_link_status_property(struct drm_connector *connector,
2399 : uint64_t link_status)
2400 : {
2401 0 : struct drm_device *dev = connector->dev;
2402 :
2403 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2404 0 : connector->state->link_status = link_status;
2405 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
2406 0 : }
2407 : EXPORT_SYMBOL(drm_connector_set_link_status_property);
2408 :
2409 : /**
2410 : * drm_connector_attach_max_bpc_property - attach "max bpc" property
2411 : * @connector: connector to attach max bpc property on.
2412 : * @min: The minimum bit depth supported by the connector.
2413 : * @max: The maximum bit depth supported by the connector.
2414 : *
2415 : * This is used to add support for limiting the bit depth on a connector.
2416 : *
2417 : * Returns:
2418 : * Zero on success, negative errno on failure.
2419 : */
2420 0 : int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
2421 : int min, int max)
2422 : {
2423 0 : struct drm_device *dev = connector->dev;
2424 : struct drm_property *prop;
2425 :
2426 0 : prop = connector->max_bpc_property;
2427 0 : if (!prop) {
2428 0 : prop = drm_property_create_range(dev, 0, "max bpc", min, max);
2429 0 : if (!prop)
2430 : return -ENOMEM;
2431 :
2432 0 : connector->max_bpc_property = prop;
2433 : }
2434 :
2435 0 : drm_object_attach_property(&connector->base, prop, max);
2436 0 : connector->state->max_requested_bpc = max;
2437 0 : connector->state->max_bpc = max;
2438 :
2439 0 : return 0;
2440 : }
2441 : EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
2442 :
2443 : /**
2444 : * drm_connector_attach_hdr_output_metadata_property - attach "HDR_OUTPUT_METADA" property
2445 : * @connector: connector to attach the property on.
2446 : *
2447 : * This is used to allow the userspace to send HDR Metadata to the
2448 : * driver.
2449 : *
2450 : * Returns:
2451 : * Zero on success, negative errno on failure.
2452 : */
2453 0 : int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector)
2454 : {
2455 0 : struct drm_device *dev = connector->dev;
2456 0 : struct drm_property *prop = dev->mode_config.hdr_output_metadata_property;
2457 :
2458 0 : drm_object_attach_property(&connector->base, prop, 0);
2459 :
2460 0 : return 0;
2461 : }
2462 : EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
2463 :
2464 : /**
2465 : * drm_connector_attach_colorspace_property - attach "Colorspace" property
2466 : * @connector: connector to attach the property on.
2467 : *
2468 : * This is used to allow the userspace to signal the output colorspace
2469 : * to the driver.
2470 : *
2471 : * Returns:
2472 : * Zero on success, negative errno on failure.
2473 : */
2474 0 : int drm_connector_attach_colorspace_property(struct drm_connector *connector)
2475 : {
2476 0 : struct drm_property *prop = connector->colorspace_property;
2477 :
2478 0 : drm_object_attach_property(&connector->base, prop, DRM_MODE_COLORIMETRY_DEFAULT);
2479 :
2480 0 : return 0;
2481 : }
2482 : EXPORT_SYMBOL(drm_connector_attach_colorspace_property);
2483 :
2484 : /**
2485 : * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed
2486 : * @old_state: old connector state to compare
2487 : * @new_state: new connector state to compare
2488 : *
2489 : * This is used by HDR-enabled drivers to test whether the HDR metadata
2490 : * have changed between two different connector state (and thus probably
2491 : * requires a full blown mode change).
2492 : *
2493 : * Returns:
2494 : * True if the metadata are equal, False otherwise
2495 : */
2496 0 : bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
2497 : struct drm_connector_state *new_state)
2498 : {
2499 0 : struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
2500 0 : struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
2501 :
2502 0 : if (!old_blob || !new_blob)
2503 0 : return old_blob == new_blob;
2504 :
2505 0 : if (old_blob->length != new_blob->length)
2506 : return false;
2507 :
2508 0 : return !memcmp(old_blob->data, new_blob->data, old_blob->length);
2509 : }
2510 : EXPORT_SYMBOL(drm_connector_atomic_hdr_metadata_equal);
2511 :
2512 : /**
2513 : * drm_connector_set_vrr_capable_property - sets the variable refresh rate
2514 : * capable property for a connector
2515 : * @connector: drm connector
2516 : * @capable: True if the connector is variable refresh rate capable
2517 : *
2518 : * Should be used by atomic drivers to update the indicated support for
2519 : * variable refresh rate over a connector.
2520 : */
2521 0 : void drm_connector_set_vrr_capable_property(
2522 : struct drm_connector *connector, bool capable)
2523 : {
2524 0 : if (!connector->vrr_capable_property)
2525 : return;
2526 :
2527 0 : drm_object_property_set_value(&connector->base,
2528 : connector->vrr_capable_property,
2529 : capable);
2530 : }
2531 : EXPORT_SYMBOL(drm_connector_set_vrr_capable_property);
2532 :
2533 : /**
2534 : * drm_connector_set_panel_orientation - sets the connector's panel_orientation
2535 : * @connector: connector for which to set the panel-orientation property.
2536 : * @panel_orientation: drm_panel_orientation value to set
2537 : *
2538 : * This function sets the connector's panel_orientation and attaches
2539 : * a "panel orientation" property to the connector.
2540 : *
2541 : * Calling this function on a connector where the panel_orientation has
2542 : * already been set is a no-op (e.g. the orientation has been overridden with
2543 : * a kernel commandline option).
2544 : *
2545 : * It is allowed to call this function with a panel_orientation of
2546 : * DRM_MODE_PANEL_ORIENTATION_UNKNOWN, in which case it is a no-op.
2547 : *
2548 : * The function shouldn't be called in panel after drm is registered (i.e.
2549 : * drm_dev_register() is called in drm).
2550 : *
2551 : * Returns:
2552 : * Zero on success, negative errno on failure.
2553 : */
2554 0 : int drm_connector_set_panel_orientation(
2555 : struct drm_connector *connector,
2556 : enum drm_panel_orientation panel_orientation)
2557 : {
2558 0 : struct drm_device *dev = connector->dev;
2559 0 : struct drm_display_info *info = &connector->display_info;
2560 : struct drm_property *prop;
2561 :
2562 : /* Already set? */
2563 0 : if (info->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2564 : return 0;
2565 :
2566 : /* Don't attach the property if the orientation is unknown */
2567 0 : if (panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2568 : return 0;
2569 :
2570 0 : info->panel_orientation = panel_orientation;
2571 :
2572 0 : prop = dev->mode_config.panel_orientation_property;
2573 0 : if (!prop) {
2574 0 : prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
2575 : "panel orientation",
2576 : drm_panel_orientation_enum_list,
2577 : ARRAY_SIZE(drm_panel_orientation_enum_list));
2578 0 : if (!prop)
2579 : return -ENOMEM;
2580 :
2581 0 : dev->mode_config.panel_orientation_property = prop;
2582 : }
2583 :
2584 0 : drm_object_attach_property(&connector->base, prop,
2585 0 : info->panel_orientation);
2586 0 : return 0;
2587 : }
2588 : EXPORT_SYMBOL(drm_connector_set_panel_orientation);
2589 :
2590 : /**
2591 : * drm_connector_set_panel_orientation_with_quirk - set the
2592 : * connector's panel_orientation after checking for quirks
2593 : * @connector: connector for which to init the panel-orientation property.
2594 : * @panel_orientation: drm_panel_orientation value to set
2595 : * @width: width in pixels of the panel, used for panel quirk detection
2596 : * @height: height in pixels of the panel, used for panel quirk detection
2597 : *
2598 : * Like drm_connector_set_panel_orientation(), but with a check for platform
2599 : * specific (e.g. DMI based) quirks overriding the passed in panel_orientation.
2600 : *
2601 : * Returns:
2602 : * Zero on success, negative errno on failure.
2603 : */
2604 0 : int drm_connector_set_panel_orientation_with_quirk(
2605 : struct drm_connector *connector,
2606 : enum drm_panel_orientation panel_orientation,
2607 : int width, int height)
2608 : {
2609 : int orientation_quirk;
2610 :
2611 0 : orientation_quirk = drm_get_panel_orientation_quirk(width, height);
2612 0 : if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2613 0 : panel_orientation = orientation_quirk;
2614 :
2615 0 : return drm_connector_set_panel_orientation(connector,
2616 : panel_orientation);
2617 : }
2618 : EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk);
2619 :
2620 : /**
2621 : * drm_connector_set_orientation_from_panel -
2622 : * set the connector's panel_orientation from panel's callback.
2623 : * @connector: connector for which to init the panel-orientation property.
2624 : * @panel: panel that can provide orientation information.
2625 : *
2626 : * Drm drivers should call this function before drm_dev_register().
2627 : * Orientation is obtained from panel's .get_orientation() callback.
2628 : *
2629 : * Returns:
2630 : * Zero on success, negative errno on failure.
2631 : */
2632 0 : int drm_connector_set_orientation_from_panel(
2633 : struct drm_connector *connector,
2634 : struct drm_panel *panel)
2635 : {
2636 : enum drm_panel_orientation orientation;
2637 :
2638 0 : if (panel && panel->funcs && panel->funcs->get_orientation)
2639 0 : orientation = panel->funcs->get_orientation(panel);
2640 : else
2641 : orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
2642 :
2643 0 : return drm_connector_set_panel_orientation(connector, orientation);
2644 : }
2645 : EXPORT_SYMBOL(drm_connector_set_orientation_from_panel);
2646 :
2647 : static const struct drm_prop_enum_list privacy_screen_enum[] = {
2648 : { PRIVACY_SCREEN_DISABLED, "Disabled" },
2649 : { PRIVACY_SCREEN_ENABLED, "Enabled" },
2650 : { PRIVACY_SCREEN_DISABLED_LOCKED, "Disabled-locked" },
2651 : { PRIVACY_SCREEN_ENABLED_LOCKED, "Enabled-locked" },
2652 : };
2653 :
2654 : /**
2655 : * drm_connector_create_privacy_screen_properties - create the drm connecter's
2656 : * privacy-screen properties.
2657 : * @connector: connector for which to create the privacy-screen properties
2658 : *
2659 : * This function creates the "privacy-screen sw-state" and "privacy-screen
2660 : * hw-state" properties for the connector. They are not attached.
2661 : */
2662 : void
2663 0 : drm_connector_create_privacy_screen_properties(struct drm_connector *connector)
2664 : {
2665 0 : if (connector->privacy_screen_sw_state_property)
2666 : return;
2667 :
2668 : /* Note sw-state only supports the first 2 values of the enum */
2669 0 : connector->privacy_screen_sw_state_property =
2670 0 : drm_property_create_enum(connector->dev, DRM_MODE_PROP_ENUM,
2671 : "privacy-screen sw-state",
2672 : privacy_screen_enum, 2);
2673 :
2674 0 : connector->privacy_screen_hw_state_property =
2675 0 : drm_property_create_enum(connector->dev,
2676 : DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_ENUM,
2677 : "privacy-screen hw-state",
2678 : privacy_screen_enum,
2679 : ARRAY_SIZE(privacy_screen_enum));
2680 : }
2681 : EXPORT_SYMBOL(drm_connector_create_privacy_screen_properties);
2682 :
2683 : /**
2684 : * drm_connector_attach_privacy_screen_properties - attach the drm connecter's
2685 : * privacy-screen properties.
2686 : * @connector: connector on which to attach the privacy-screen properties
2687 : *
2688 : * This function attaches the "privacy-screen sw-state" and "privacy-screen
2689 : * hw-state" properties to the connector. The initial state of both is set
2690 : * to "Disabled".
2691 : */
2692 : void
2693 0 : drm_connector_attach_privacy_screen_properties(struct drm_connector *connector)
2694 : {
2695 0 : if (!connector->privacy_screen_sw_state_property)
2696 : return;
2697 :
2698 0 : drm_object_attach_property(&connector->base,
2699 : connector->privacy_screen_sw_state_property,
2700 : PRIVACY_SCREEN_DISABLED);
2701 :
2702 0 : drm_object_attach_property(&connector->base,
2703 : connector->privacy_screen_hw_state_property,
2704 : PRIVACY_SCREEN_DISABLED);
2705 : }
2706 : EXPORT_SYMBOL(drm_connector_attach_privacy_screen_properties);
2707 :
2708 : static void drm_connector_update_privacy_screen_properties(
2709 : struct drm_connector *connector, bool set_sw_state)
2710 : {
2711 : enum drm_privacy_screen_status sw_state, hw_state;
2712 :
2713 0 : drm_privacy_screen_get_state(connector->privacy_screen,
2714 : &sw_state, &hw_state);
2715 :
2716 : if (set_sw_state)
2717 0 : connector->state->privacy_screen_sw_state = sw_state;
2718 0 : drm_object_property_set_value(&connector->base,
2719 : connector->privacy_screen_hw_state_property, hw_state);
2720 : }
2721 :
2722 0 : static int drm_connector_privacy_screen_notifier(
2723 : struct notifier_block *nb, unsigned long action, void *data)
2724 : {
2725 0 : struct drm_connector *connector =
2726 0 : container_of(nb, struct drm_connector, privacy_screen_notifier);
2727 0 : struct drm_device *dev = connector->dev;
2728 :
2729 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2730 0 : drm_connector_update_privacy_screen_properties(connector, true);
2731 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
2732 :
2733 0 : drm_sysfs_connector_property_event(connector,
2734 : connector->privacy_screen_sw_state_property);
2735 0 : drm_sysfs_connector_property_event(connector,
2736 : connector->privacy_screen_hw_state_property);
2737 :
2738 0 : return NOTIFY_DONE;
2739 : }
2740 :
2741 : /**
2742 : * drm_connector_attach_privacy_screen_provider - attach a privacy-screen to
2743 : * the connector
2744 : * @connector: connector to attach the privacy-screen to
2745 : * @priv: drm_privacy_screen to attach
2746 : *
2747 : * Create and attach the standard privacy-screen properties and register
2748 : * a generic notifier for generating sysfs-connector-status-events
2749 : * on external changes to the privacy-screen status.
2750 : * This function takes ownership of the passed in drm_privacy_screen and will
2751 : * call drm_privacy_screen_put() on it when the connector is destroyed.
2752 : */
2753 0 : void drm_connector_attach_privacy_screen_provider(
2754 : struct drm_connector *connector, struct drm_privacy_screen *priv)
2755 : {
2756 0 : connector->privacy_screen = priv;
2757 0 : connector->privacy_screen_notifier.notifier_call =
2758 : drm_connector_privacy_screen_notifier;
2759 :
2760 0 : drm_connector_create_privacy_screen_properties(connector);
2761 0 : drm_connector_update_privacy_screen_properties(connector, true);
2762 0 : drm_connector_attach_privacy_screen_properties(connector);
2763 0 : }
2764 : EXPORT_SYMBOL(drm_connector_attach_privacy_screen_provider);
2765 :
2766 : /**
2767 : * drm_connector_update_privacy_screen - update connector's privacy-screen sw-state
2768 : * @connector_state: connector-state to update the privacy-screen for
2769 : *
2770 : * This function calls drm_privacy_screen_set_sw_state() on the connector's
2771 : * privacy-screen.
2772 : *
2773 : * If the connector has no privacy-screen, then this is a no-op.
2774 : */
2775 0 : void drm_connector_update_privacy_screen(const struct drm_connector_state *connector_state)
2776 : {
2777 0 : struct drm_connector *connector = connector_state->connector;
2778 : int ret;
2779 :
2780 0 : if (!connector->privacy_screen)
2781 : return;
2782 :
2783 0 : ret = drm_privacy_screen_set_sw_state(connector->privacy_screen,
2784 : connector_state->privacy_screen_sw_state);
2785 : if (ret) {
2786 0 : drm_err(connector->dev, "Error updating privacy-screen sw_state\n");
2787 0 : return;
2788 : }
2789 :
2790 : /* The hw_state property value may have changed, update it. */
2791 : drm_connector_update_privacy_screen_properties(connector, false);
2792 : }
2793 : EXPORT_SYMBOL(drm_connector_update_privacy_screen);
2794 :
2795 0 : int drm_connector_set_obj_prop(struct drm_mode_object *obj,
2796 : struct drm_property *property,
2797 : uint64_t value)
2798 : {
2799 0 : int ret = -EINVAL;
2800 0 : struct drm_connector *connector = obj_to_connector(obj);
2801 :
2802 : /* Do DPMS ourselves */
2803 0 : if (property == connector->dev->mode_config.dpms_property) {
2804 0 : ret = (*connector->funcs->dpms)(connector, (int)value);
2805 0 : } else if (connector->funcs->set_property)
2806 0 : ret = connector->funcs->set_property(connector, property, value);
2807 :
2808 0 : if (!ret)
2809 0 : drm_object_property_set_value(&connector->base, property, value);
2810 0 : return ret;
2811 : }
2812 :
2813 0 : int drm_connector_property_set_ioctl(struct drm_device *dev,
2814 : void *data, struct drm_file *file_priv)
2815 : {
2816 0 : struct drm_mode_connector_set_property *conn_set_prop = data;
2817 0 : struct drm_mode_obj_set_property obj_set_prop = {
2818 0 : .value = conn_set_prop->value,
2819 0 : .prop_id = conn_set_prop->prop_id,
2820 0 : .obj_id = conn_set_prop->connector_id,
2821 : .obj_type = DRM_MODE_OBJECT_CONNECTOR
2822 : };
2823 :
2824 : /* It does all the locking and checking we need */
2825 0 : return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
2826 : }
2827 :
2828 : static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
2829 : {
2830 : /* For atomic drivers only state objects are synchronously updated and
2831 : * protected by modeset locks, so check those first.
2832 : */
2833 0 : if (connector->state)
2834 0 : return connector->state->best_encoder;
2835 : return connector->encoder;
2836 : }
2837 :
2838 : static bool
2839 0 : drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
2840 : const struct list_head *modes,
2841 : const struct drm_file *file_priv)
2842 : {
2843 : /*
2844 : * If user-space hasn't configured the driver to expose the stereo 3D
2845 : * modes, don't expose them.
2846 : */
2847 0 : if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
2848 : return false;
2849 : /*
2850 : * If user-space hasn't configured the driver to expose the modes
2851 : * with aspect-ratio, don't expose them. However if such a mode
2852 : * is unique, let it be exposed, but reset the aspect-ratio flags
2853 : * while preparing the list of user-modes.
2854 : */
2855 0 : if (!file_priv->aspect_ratio_allowed) {
2856 : const struct drm_display_mode *mode_itr;
2857 :
2858 0 : list_for_each_entry(mode_itr, modes, head) {
2859 0 : if (mode_itr->expose_to_userspace &&
2860 0 : drm_mode_match(mode_itr, mode,
2861 : DRM_MODE_MATCH_TIMINGS |
2862 : DRM_MODE_MATCH_CLOCK |
2863 : DRM_MODE_MATCH_FLAGS |
2864 : DRM_MODE_MATCH_3D_FLAGS))
2865 : return false;
2866 : }
2867 : }
2868 :
2869 : return true;
2870 : }
2871 :
2872 0 : int drm_mode_getconnector(struct drm_device *dev, void *data,
2873 : struct drm_file *file_priv)
2874 : {
2875 0 : struct drm_mode_get_connector *out_resp = data;
2876 : struct drm_connector *connector;
2877 : struct drm_encoder *encoder;
2878 : struct drm_display_mode *mode;
2879 0 : int mode_count = 0;
2880 0 : int encoders_count = 0;
2881 0 : int ret = 0;
2882 0 : int copied = 0;
2883 : struct drm_mode_modeinfo u_mode;
2884 : struct drm_mode_modeinfo __user *mode_ptr;
2885 : uint32_t __user *encoder_ptr;
2886 : bool is_current_master;
2887 :
2888 0 : if (!drm_core_check_feature(dev, DRIVER_MODESET))
2889 : return -EOPNOTSUPP;
2890 :
2891 0 : memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2892 :
2893 0 : connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
2894 0 : if (!connector)
2895 : return -ENOENT;
2896 :
2897 0 : encoders_count = hweight32(connector->possible_encoders);
2898 :
2899 0 : if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2900 0 : copied = 0;
2901 0 : encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2902 :
2903 0 : drm_connector_for_each_possible_encoder(connector, encoder) {
2904 0 : if (put_user(encoder->base.id, encoder_ptr + copied)) {
2905 : ret = -EFAULT;
2906 : goto out;
2907 : }
2908 0 : copied++;
2909 : }
2910 : }
2911 0 : out_resp->count_encoders = encoders_count;
2912 :
2913 0 : out_resp->connector_id = connector->base.id;
2914 0 : out_resp->connector_type = connector->connector_type;
2915 0 : out_resp->connector_type_id = connector->connector_type_id;
2916 :
2917 0 : is_current_master = drm_is_current_master(file_priv);
2918 :
2919 0 : mutex_lock(&dev->mode_config.mutex);
2920 0 : if (out_resp->count_modes == 0) {
2921 0 : if (is_current_master)
2922 0 : connector->funcs->fill_modes(connector,
2923 0 : dev->mode_config.max_width,
2924 0 : dev->mode_config.max_height);
2925 : else
2926 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",
2927 : connector->base.id, connector->name);
2928 : }
2929 :
2930 0 : out_resp->mm_width = connector->display_info.width_mm;
2931 0 : out_resp->mm_height = connector->display_info.height_mm;
2932 0 : out_resp->subpixel = connector->display_info.subpixel_order;
2933 0 : out_resp->connection = connector->status;
2934 :
2935 : /* delayed so we get modes regardless of pre-fill_modes state */
2936 0 : list_for_each_entry(mode, &connector->modes, head) {
2937 0 : WARN_ON(mode->expose_to_userspace);
2938 :
2939 0 : if (drm_mode_expose_to_userspace(mode, &connector->modes,
2940 : file_priv)) {
2941 0 : mode->expose_to_userspace = true;
2942 0 : mode_count++;
2943 : }
2944 : }
2945 :
2946 : /*
2947 : * This ioctl is called twice, once to determine how much space is
2948 : * needed, and the 2nd time to fill it.
2949 : */
2950 0 : if ((out_resp->count_modes >= mode_count) && mode_count) {
2951 0 : copied = 0;
2952 0 : mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2953 0 : list_for_each_entry(mode, &connector->modes, head) {
2954 0 : if (!mode->expose_to_userspace)
2955 0 : continue;
2956 :
2957 : /* Clear the tag for the next time around */
2958 0 : mode->expose_to_userspace = false;
2959 :
2960 0 : drm_mode_convert_to_umode(&u_mode, mode);
2961 : /*
2962 : * Reset aspect ratio flags of user-mode, if modes with
2963 : * aspect-ratio are not supported.
2964 : */
2965 0 : if (!file_priv->aspect_ratio_allowed)
2966 0 : u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
2967 0 : if (copy_to_user(mode_ptr + copied,
2968 : &u_mode, sizeof(u_mode))) {
2969 0 : ret = -EFAULT;
2970 :
2971 : /*
2972 : * Clear the tag for the rest of
2973 : * the modes for the next time around.
2974 : */
2975 0 : list_for_each_entry_continue(mode, &connector->modes, head)
2976 0 : mode->expose_to_userspace = false;
2977 :
2978 0 : mutex_unlock(&dev->mode_config.mutex);
2979 :
2980 0 : goto out;
2981 : }
2982 0 : copied++;
2983 : }
2984 : } else {
2985 : /* Clear the tag for the next time around */
2986 0 : list_for_each_entry(mode, &connector->modes, head)
2987 0 : mode->expose_to_userspace = false;
2988 : }
2989 :
2990 0 : out_resp->count_modes = mode_count;
2991 0 : mutex_unlock(&dev->mode_config.mutex);
2992 :
2993 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2994 0 : encoder = drm_connector_get_encoder(connector);
2995 0 : if (encoder)
2996 0 : out_resp->encoder_id = encoder->base.id;
2997 : else
2998 0 : out_resp->encoder_id = 0;
2999 :
3000 : /* Only grab properties after probing, to make sure EDID and other
3001 : * properties reflect the latest status.
3002 : */
3003 0 : ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
3004 0 : (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
3005 0 : (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
3006 0 : &out_resp->count_props);
3007 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
3008 :
3009 : out:
3010 0 : drm_connector_put(connector);
3011 :
3012 0 : return ret;
3013 : }
3014 :
3015 : /**
3016 : * drm_connector_find_by_fwnode - Find a connector based on the associated fwnode
3017 : * @fwnode: fwnode for which to find the matching drm_connector
3018 : *
3019 : * This functions looks up a drm_connector based on its associated fwnode. When
3020 : * a connector is found a reference to the connector is returned. The caller must
3021 : * call drm_connector_put() to release this reference when it is done with the
3022 : * connector.
3023 : *
3024 : * Returns: A reference to the found connector or an ERR_PTR().
3025 : */
3026 0 : struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
3027 : {
3028 0 : struct drm_connector *connector, *found = ERR_PTR(-ENODEV);
3029 :
3030 0 : if (!fwnode)
3031 : return ERR_PTR(-ENODEV);
3032 :
3033 0 : mutex_lock(&connector_list_lock);
3034 :
3035 0 : list_for_each_entry(connector, &connector_list, global_connector_list_entry) {
3036 0 : if (connector->fwnode == fwnode ||
3037 0 : (connector->fwnode && connector->fwnode->secondary == fwnode)) {
3038 0 : drm_connector_get(connector);
3039 0 : found = connector;
3040 0 : break;
3041 : }
3042 : }
3043 :
3044 0 : mutex_unlock(&connector_list_lock);
3045 :
3046 0 : return found;
3047 : }
3048 :
3049 : /**
3050 : * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
3051 : * @connector_fwnode: fwnode_handle to report the event on
3052 : *
3053 : * On some hardware a hotplug event notification may come from outside the display
3054 : * driver / device. An example of this is some USB Type-C setups where the hardware
3055 : * muxes the DisplayPort data and aux-lines but does not pass the altmode HPD
3056 : * status bit to the GPU's DP HPD pin.
3057 : *
3058 : * This function can be used to report these out-of-band events after obtaining
3059 : * a drm_connector reference through calling drm_connector_find_by_fwnode().
3060 : */
3061 0 : void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
3062 : {
3063 : struct drm_connector *connector;
3064 :
3065 0 : connector = drm_connector_find_by_fwnode(connector_fwnode);
3066 0 : if (IS_ERR(connector))
3067 : return;
3068 :
3069 0 : if (connector->funcs->oob_hotplug_event)
3070 0 : connector->funcs->oob_hotplug_event(connector);
3071 :
3072 : drm_connector_put(connector);
3073 : }
3074 : EXPORT_SYMBOL(drm_connector_oob_hotplug_event);
3075 :
3076 :
3077 : /**
3078 : * DOC: Tile group
3079 : *
3080 : * Tile groups are used to represent tiled monitors with a unique integer
3081 : * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
3082 : * we store this in a tile group, so we have a common identifier for all tiles
3083 : * in a monitor group. The property is called "TILE". Drivers can manage tile
3084 : * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
3085 : * drm_mode_get_tile_group(). But this is only needed for internal panels where
3086 : * the tile group information is exposed through a non-standard way.
3087 : */
3088 :
3089 0 : static void drm_tile_group_free(struct kref *kref)
3090 : {
3091 0 : struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
3092 0 : struct drm_device *dev = tg->dev;
3093 :
3094 0 : mutex_lock(&dev->mode_config.idr_mutex);
3095 0 : idr_remove(&dev->mode_config.tile_idr, tg->id);
3096 0 : mutex_unlock(&dev->mode_config.idr_mutex);
3097 0 : kfree(tg);
3098 0 : }
3099 :
3100 : /**
3101 : * drm_mode_put_tile_group - drop a reference to a tile group.
3102 : * @dev: DRM device
3103 : * @tg: tile group to drop reference to.
3104 : *
3105 : * drop reference to tile group and free if 0.
3106 : */
3107 0 : void drm_mode_put_tile_group(struct drm_device *dev,
3108 : struct drm_tile_group *tg)
3109 : {
3110 0 : kref_put(&tg->refcount, drm_tile_group_free);
3111 0 : }
3112 : EXPORT_SYMBOL(drm_mode_put_tile_group);
3113 :
3114 : /**
3115 : * drm_mode_get_tile_group - get a reference to an existing tile group
3116 : * @dev: DRM device
3117 : * @topology: 8-bytes unique per monitor.
3118 : *
3119 : * Use the unique bytes to get a reference to an existing tile group.
3120 : *
3121 : * RETURNS:
3122 : * tile group or NULL if not found.
3123 : */
3124 0 : struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
3125 : const char topology[8])
3126 : {
3127 : struct drm_tile_group *tg;
3128 : int id;
3129 :
3130 0 : mutex_lock(&dev->mode_config.idr_mutex);
3131 0 : idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
3132 0 : if (!memcmp(tg->group_data, topology, 8)) {
3133 0 : if (!kref_get_unless_zero(&tg->refcount))
3134 0 : tg = NULL;
3135 0 : mutex_unlock(&dev->mode_config.idr_mutex);
3136 0 : return tg;
3137 : }
3138 : }
3139 0 : mutex_unlock(&dev->mode_config.idr_mutex);
3140 0 : return NULL;
3141 : }
3142 : EXPORT_SYMBOL(drm_mode_get_tile_group);
3143 :
3144 : /**
3145 : * drm_mode_create_tile_group - create a tile group from a displayid description
3146 : * @dev: DRM device
3147 : * @topology: 8-bytes unique per monitor.
3148 : *
3149 : * Create a tile group for the unique monitor, and get a unique
3150 : * identifier for the tile group.
3151 : *
3152 : * RETURNS:
3153 : * new tile group or NULL.
3154 : */
3155 0 : struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
3156 : const char topology[8])
3157 : {
3158 : struct drm_tile_group *tg;
3159 : int ret;
3160 :
3161 0 : tg = kzalloc(sizeof(*tg), GFP_KERNEL);
3162 0 : if (!tg)
3163 : return NULL;
3164 :
3165 0 : kref_init(&tg->refcount);
3166 0 : memcpy(tg->group_data, topology, 8);
3167 0 : tg->dev = dev;
3168 :
3169 0 : mutex_lock(&dev->mode_config.idr_mutex);
3170 0 : ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
3171 0 : if (ret >= 0) {
3172 0 : tg->id = ret;
3173 : } else {
3174 0 : kfree(tg);
3175 0 : tg = NULL;
3176 : }
3177 :
3178 0 : mutex_unlock(&dev->mode_config.idr_mutex);
3179 0 : return tg;
3180 : }
3181 : EXPORT_SYMBOL(drm_mode_create_tile_group);
|
