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1 : : /*
2 : : * Copyright (c) 2016 Intel Corporation
3 : : *
4 : : * Permission to use, copy, modify, distribute, and sell this software and its
5 : : * documentation for any purpose is hereby granted without fee, provided that
6 : : * the above copyright notice appear in all copies and that both that copyright
7 : : * notice and this permission notice appear in supporting documentation, and
8 : : * that the name of the copyright holders not be used in advertising or
9 : : * publicity pertaining to distribution of the software without specific,
10 : : * written prior permission. The copyright holders make no representations
11 : : * about the suitability of this software for any purpose. It is provided "as
12 : : * is" without express or implied warranty.
13 : : *
14 : : * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 : : * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 : : * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 : : * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 : : * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 : : * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 : : * OF THIS SOFTWARE.
21 : : */
22 : :
23 : : #include <drm/drm_connector.h>
24 : : #include <drm/drm_edid.h>
25 : : #include <drm/drm_encoder.h>
26 : : #include <drm/drm_utils.h>
27 : : #include <drm/drm_print.h>
28 : : #include <drm/drm_drv.h>
29 : : #include <drm/drm_file.h>
30 : :
31 : : #include <linux/uaccess.h>
32 : :
33 : : #include "drm_crtc_internal.h"
34 : : #include "drm_internal.h"
35 : :
36 : : /**
37 : : * DOC: overview
38 : : *
39 : : * In DRM connectors are the general abstraction for display sinks, and include
40 : : * als fixed panels or anything else that can display pixels in some form. As
41 : : * opposed to all other KMS objects representing hardware (like CRTC, encoder or
42 : : * plane abstractions) connectors can be hotplugged and unplugged at runtime.
43 : : * Hence they are reference-counted using drm_connector_get() and
44 : : * drm_connector_put().
45 : : *
46 : : * KMS driver must create, initialize, register and attach at a &struct
47 : : * drm_connector for each such sink. The instance is created as other KMS
48 : : * objects and initialized by setting the following fields. The connector is
49 : : * initialized with a call to drm_connector_init() with a pointer to the
50 : : * &struct drm_connector_funcs and a connector type, and then exposed to
51 : : * userspace with a call to drm_connector_register().
52 : : *
53 : : * Connectors must be attached to an encoder to be used. For devices that map
54 : : * connectors to encoders 1:1, the connector should be attached at
55 : : * initialization time with a call to drm_connector_attach_encoder(). The
56 : : * driver must also set the &drm_connector.encoder field to point to the
57 : : * attached encoder.
58 : : *
59 : : * For connectors which are not fixed (like built-in panels) the driver needs to
60 : : * support hotplug notifications. The simplest way to do that is by using the
61 : : * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
62 : : * hardware support for hotplug interrupts. Connectors with hardware hotplug
63 : : * support can instead use e.g. drm_helper_hpd_irq_event().
64 : : */
65 : :
66 : : struct drm_conn_prop_enum_list {
67 : : int type;
68 : : const char *name;
69 : : struct ida ida;
70 : : };
71 : :
72 : : /*
73 : : * Connector and encoder types.
74 : : */
75 : : static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
76 : : { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
77 : : { DRM_MODE_CONNECTOR_VGA, "VGA" },
78 : : { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
79 : : { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
80 : : { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
81 : : { DRM_MODE_CONNECTOR_Composite, "Composite" },
82 : : { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
83 : : { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
84 : : { DRM_MODE_CONNECTOR_Component, "Component" },
85 : : { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
86 : : { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
87 : : { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
88 : : { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
89 : : { DRM_MODE_CONNECTOR_TV, "TV" },
90 : : { DRM_MODE_CONNECTOR_eDP, "eDP" },
91 : : { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
92 : : { DRM_MODE_CONNECTOR_DSI, "DSI" },
93 : : { DRM_MODE_CONNECTOR_DPI, "DPI" },
94 : : { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" },
95 : : { DRM_MODE_CONNECTOR_SPI, "SPI" },
96 : : };
97 : :
98 : 21 : void drm_connector_ida_init(void)
99 : : {
100 : 21 : int i;
101 : :
102 [ + + ]: 441 : for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
103 : 420 : ida_init(&drm_connector_enum_list[i].ida);
104 : 21 : }
105 : :
106 : 0 : void drm_connector_ida_destroy(void)
107 : : {
108 : 0 : int i;
109 : :
110 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
111 : 0 : ida_destroy(&drm_connector_enum_list[i].ida);
112 : 0 : }
113 : :
114 : : /**
115 : : * drm_connector_get_cmdline_mode - reads the user's cmdline mode
116 : : * @connector: connector to quwery
117 : : *
118 : : * The kernel supports per-connector configuration of its consoles through
119 : : * use of the video= parameter. This function parses that option and
120 : : * extracts the user's specified mode (or enable/disable status) for a
121 : : * particular connector. This is typically only used during the early fbdev
122 : : * setup.
123 : : */
124 : 0 : static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
125 : : {
126 : 0 : struct drm_cmdline_mode *mode = &connector->cmdline_mode;
127 : 0 : char *option = NULL;
128 : :
129 [ # # ]: 0 : if (fb_get_options(connector->name, &option))
130 : 0 : return;
131 : :
132 [ # # ]: 0 : if (!drm_mode_parse_command_line_for_connector(option,
133 : : connector,
134 : : mode))
135 : : return;
136 : :
137 [ # # ]: 0 : if (mode->force) {
138 : 0 : DRM_INFO("forcing %s connector %s\n", connector->name,
139 : : drm_get_connector_force_name(mode->force));
140 : 0 : connector->force = mode->force;
141 : : }
142 : :
143 [ # # # # : 0 : DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n",
# # # # ]
144 : : connector->name, mode->name,
145 : : mode->xres, mode->yres,
146 : : mode->refresh_specified ? mode->refresh : 60,
147 : : mode->rb ? " reduced blanking" : "",
148 : : mode->margins ? " with margins" : "",
149 : : mode->interlace ? " interlaced" : "");
150 : : }
151 : :
152 : 0 : static void drm_connector_free(struct kref *kref)
153 : : {
154 : 0 : struct drm_connector *connector =
155 : 0 : container_of(kref, struct drm_connector, base.refcount);
156 : 0 : struct drm_device *dev = connector->dev;
157 : :
158 : 0 : drm_mode_object_unregister(dev, &connector->base);
159 : 0 : connector->funcs->destroy(connector);
160 : 0 : }
161 : :
162 : 0 : void drm_connector_free_work_fn(struct work_struct *work)
163 : : {
164 : 0 : struct drm_connector *connector, *n;
165 : 0 : struct drm_device *dev =
166 : 0 : container_of(work, struct drm_device, mode_config.connector_free_work);
167 : 0 : struct drm_mode_config *config = &dev->mode_config;
168 : 0 : unsigned long flags;
169 : 0 : struct llist_node *freed;
170 : :
171 : 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
172 : 0 : freed = llist_del_all(&config->connector_free_list);
173 : 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
174 : :
175 [ # # ]: 0 : llist_for_each_entry_safe(connector, n, freed, free_node) {
176 : 0 : drm_mode_object_unregister(dev, &connector->base);
177 : 0 : connector->funcs->destroy(connector);
178 : : }
179 : 0 : }
180 : :
181 : : /**
182 : : * drm_connector_init - Init a preallocated connector
183 : : * @dev: DRM device
184 : : * @connector: the connector to init
185 : : * @funcs: callbacks for this connector
186 : : * @connector_type: user visible type of the connector
187 : : *
188 : : * Initialises a preallocated connector. Connectors should be
189 : : * subclassed as part of driver connector objects.
190 : : *
191 : : * Returns:
192 : : * Zero on success, error code on failure.
193 : : */
194 : 0 : int drm_connector_init(struct drm_device *dev,
195 : : struct drm_connector *connector,
196 : : const struct drm_connector_funcs *funcs,
197 : : int connector_type)
198 : : {
199 : 0 : struct drm_mode_config *config = &dev->mode_config;
200 : 0 : int ret;
201 : 0 : struct ida *connector_ida =
202 : : &drm_connector_enum_list[connector_type].ida;
203 : :
204 [ # # # # : 0 : WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
# # # # #
# ]
205 : : (!funcs->atomic_destroy_state ||
206 : : !funcs->atomic_duplicate_state));
207 : :
208 : 0 : ret = __drm_mode_object_add(dev, &connector->base,
209 : : DRM_MODE_OBJECT_CONNECTOR,
210 : : false, drm_connector_free);
211 [ # # ]: 0 : if (ret)
212 : : return ret;
213 : :
214 : 0 : connector->base.properties = &connector->properties;
215 : 0 : connector->dev = dev;
216 : 0 : connector->funcs = funcs;
217 : :
218 : : /* connector index is used with 32bit bitmasks */
219 : 0 : ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
220 [ # # ]: 0 : if (ret < 0) {
221 : 0 : DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
222 : : drm_connector_enum_list[connector_type].name,
223 : : ret);
224 : 0 : goto out_put;
225 : : }
226 : 0 : connector->index = ret;
227 : 0 : ret = 0;
228 : :
229 : 0 : connector->connector_type = connector_type;
230 : 0 : connector->connector_type_id =
231 : 0 : ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
232 [ # # ]: 0 : if (connector->connector_type_id < 0) {
233 : 0 : ret = connector->connector_type_id;
234 : 0 : goto out_put_id;
235 : : }
236 : 0 : connector->name =
237 : 0 : kasprintf(GFP_KERNEL, "%s-%d",
238 : : drm_connector_enum_list[connector_type].name,
239 : : connector->connector_type_id);
240 [ # # ]: 0 : if (!connector->name) {
241 : 0 : ret = -ENOMEM;
242 : 0 : goto out_put_type_id;
243 : : }
244 : :
245 : 0 : INIT_LIST_HEAD(&connector->probed_modes);
246 : 0 : INIT_LIST_HEAD(&connector->modes);
247 : 0 : mutex_init(&connector->mutex);
248 : 0 : connector->edid_blob_ptr = NULL;
249 : 0 : connector->tile_blob_ptr = NULL;
250 : 0 : connector->status = connector_status_unknown;
251 : 0 : connector->display_info.panel_orientation =
252 : : DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
253 : :
254 : 0 : drm_connector_get_cmdline_mode(connector);
255 : :
256 : : /* We should add connectors at the end to avoid upsetting the connector
257 : : * index too much. */
258 : 0 : spin_lock_irq(&config->connector_list_lock);
259 : 0 : list_add_tail(&connector->head, &config->connector_list);
260 : 0 : config->num_connector++;
261 : 0 : spin_unlock_irq(&config->connector_list_lock);
262 : :
263 : 0 : if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL &&
264 [ # # ]: 0 : connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
265 : 0 : drm_connector_attach_edid_property(connector);
266 : :
267 : 0 : drm_object_attach_property(&connector->base,
268 : : config->dpms_property, 0);
269 : :
270 : 0 : drm_object_attach_property(&connector->base,
271 : : config->link_status_property,
272 : : 0);
273 : :
274 : 0 : drm_object_attach_property(&connector->base,
275 : : config->non_desktop_property,
276 : : 0);
277 : 0 : drm_object_attach_property(&connector->base,
278 : : config->tile_property,
279 : : 0);
280 : :
281 [ # # ]: 0 : if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
282 : 0 : drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
283 : : }
284 : :
285 : 0 : connector->debugfs_entry = NULL;
286 : : out_put_type_id:
287 : 0 : if (ret)
288 : 0 : ida_simple_remove(connector_ida, connector->connector_type_id);
289 : 0 : out_put_id:
290 [ # # ]: 0 : if (ret)
291 : 0 : ida_simple_remove(&config->connector_ida, connector->index);
292 : 0 : out_put:
293 [ # # ]: 0 : if (ret)
294 : 0 : drm_mode_object_unregister(dev, &connector->base);
295 : :
296 : : return ret;
297 : : }
298 : : EXPORT_SYMBOL(drm_connector_init);
299 : :
300 : : /**
301 : : * drm_connector_init_with_ddc - Init a preallocated connector
302 : : * @dev: DRM device
303 : : * @connector: the connector to init
304 : : * @funcs: callbacks for this connector
305 : : * @connector_type: user visible type of the connector
306 : : * @ddc: pointer to the associated ddc adapter
307 : : *
308 : : * Initialises a preallocated connector. Connectors should be
309 : : * subclassed as part of driver connector objects.
310 : : *
311 : : * Ensures that the ddc field of the connector is correctly set.
312 : : *
313 : : * Returns:
314 : : * Zero on success, error code on failure.
315 : : */
316 : 0 : int drm_connector_init_with_ddc(struct drm_device *dev,
317 : : struct drm_connector *connector,
318 : : const struct drm_connector_funcs *funcs,
319 : : int connector_type,
320 : : struct i2c_adapter *ddc)
321 : : {
322 : 0 : int ret;
323 : :
324 : 0 : ret = drm_connector_init(dev, connector, funcs, connector_type);
325 [ # # ]: 0 : if (ret)
326 : : return ret;
327 : :
328 : : /* provide ddc symlink in sysfs */
329 : 0 : connector->ddc = ddc;
330 : :
331 : 0 : return ret;
332 : : }
333 : : EXPORT_SYMBOL(drm_connector_init_with_ddc);
334 : :
335 : : /**
336 : : * drm_connector_attach_edid_property - attach edid property.
337 : : * @connector: the connector
338 : : *
339 : : * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a
340 : : * edid property attached by default. This function can be used to
341 : : * explicitly enable the edid property in these cases.
342 : : */
343 : 0 : void drm_connector_attach_edid_property(struct drm_connector *connector)
344 : : {
345 : 0 : struct drm_mode_config *config = &connector->dev->mode_config;
346 : :
347 : 0 : drm_object_attach_property(&connector->base,
348 : : config->edid_property,
349 : : 0);
350 : 0 : }
351 : : EXPORT_SYMBOL(drm_connector_attach_edid_property);
352 : :
353 : : /**
354 : : * drm_connector_attach_encoder - attach a connector to an encoder
355 : : * @connector: connector to attach
356 : : * @encoder: encoder to attach @connector to
357 : : *
358 : : * This function links up a connector to an encoder. Note that the routing
359 : : * restrictions between encoders and crtcs are exposed to userspace through the
360 : : * possible_clones and possible_crtcs bitmasks.
361 : : *
362 : : * Returns:
363 : : * Zero on success, negative errno on failure.
364 : : */
365 : 0 : int drm_connector_attach_encoder(struct drm_connector *connector,
366 : : struct drm_encoder *encoder)
367 : : {
368 : : /*
369 : : * In the past, drivers have attempted to model the static association
370 : : * of connector to encoder in simple connector/encoder devices using a
371 : : * direct assignment of connector->encoder = encoder. This connection
372 : : * is a logical one and the responsibility of the core, so drivers are
373 : : * expected not to mess with this.
374 : : *
375 : : * Note that the error return should've been enough here, but a large
376 : : * majority of drivers ignores the return value, so add in a big WARN
377 : : * to get people's attention.
378 : : */
379 [ # # # # ]: 0 : if (WARN_ON(connector->encoder))
380 : : return -EINVAL;
381 : :
382 : 0 : connector->possible_encoders |= drm_encoder_mask(encoder);
383 : :
384 : 0 : return 0;
385 : : }
386 : : EXPORT_SYMBOL(drm_connector_attach_encoder);
387 : :
388 : : /**
389 : : * drm_connector_has_possible_encoder - check if the connector and encoder are
390 : : * associated with each other
391 : : * @connector: the connector
392 : : * @encoder: the encoder
393 : : *
394 : : * Returns:
395 : : * True if @encoder is one of the possible encoders for @connector.
396 : : */
397 : 0 : bool drm_connector_has_possible_encoder(struct drm_connector *connector,
398 : : struct drm_encoder *encoder)
399 : : {
400 : 0 : return connector->possible_encoders & drm_encoder_mask(encoder);
401 : : }
402 : : EXPORT_SYMBOL(drm_connector_has_possible_encoder);
403 : :
404 : 0 : static void drm_mode_remove(struct drm_connector *connector,
405 : : struct drm_display_mode *mode)
406 : : {
407 : 0 : list_del(&mode->head);
408 : 0 : drm_mode_destroy(connector->dev, mode);
409 : : }
410 : :
411 : : /**
412 : : * drm_connector_cleanup - cleans up an initialised connector
413 : : * @connector: connector to cleanup
414 : : *
415 : : * Cleans up the connector but doesn't free the object.
416 : : */
417 : 0 : void drm_connector_cleanup(struct drm_connector *connector)
418 : : {
419 : 0 : struct drm_device *dev = connector->dev;
420 : 0 : struct drm_display_mode *mode, *t;
421 : :
422 : : /* The connector should have been removed from userspace long before
423 : : * it is finally destroyed.
424 : : */
425 [ # # # # ]: 0 : if (WARN_ON(connector->registration_state ==
426 : : DRM_CONNECTOR_REGISTERED))
427 : 0 : drm_connector_unregister(connector);
428 : :
429 [ # # ]: 0 : if (connector->tile_group) {
430 : 0 : drm_mode_put_tile_group(dev, connector->tile_group);
431 : 0 : connector->tile_group = NULL;
432 : : }
433 : :
434 [ # # ]: 0 : list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
435 : 0 : drm_mode_remove(connector, mode);
436 : :
437 [ # # ]: 0 : list_for_each_entry_safe(mode, t, &connector->modes, head)
438 : 0 : drm_mode_remove(connector, mode);
439 : :
440 : 0 : ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
441 : : connector->connector_type_id);
442 : :
443 : 0 : ida_simple_remove(&dev->mode_config.connector_ida,
444 : : connector->index);
445 : :
446 : 0 : kfree(connector->display_info.bus_formats);
447 : 0 : drm_mode_object_unregister(dev, &connector->base);
448 : 0 : kfree(connector->name);
449 : 0 : connector->name = NULL;
450 : 0 : spin_lock_irq(&dev->mode_config.connector_list_lock);
451 : 0 : list_del(&connector->head);
452 : 0 : dev->mode_config.num_connector--;
453 : 0 : spin_unlock_irq(&dev->mode_config.connector_list_lock);
454 : :
455 [ # # # # : 0 : WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
# # ]
456 [ # # # # ]: 0 : if (connector->state && connector->funcs->atomic_destroy_state)
457 : 0 : connector->funcs->atomic_destroy_state(connector,
458 : : connector->state);
459 : :
460 : 0 : mutex_destroy(&connector->mutex);
461 : :
462 : 0 : memset(connector, 0, sizeof(*connector));
463 : 0 : }
464 : : EXPORT_SYMBOL(drm_connector_cleanup);
465 : :
466 : : /**
467 : : * drm_connector_register - register a connector
468 : : * @connector: the connector to register
469 : : *
470 : : * Register userspace interfaces for a connector. Only call this for connectors
471 : : * which can be hotplugged after drm_dev_register() has been called already,
472 : : * e.g. DP MST connectors. All other connectors will be registered automatically
473 : : * when calling drm_dev_register().
474 : : *
475 : : * Returns:
476 : : * Zero on success, error code on failure.
477 : : */
478 : 0 : int drm_connector_register(struct drm_connector *connector)
479 : : {
480 : 0 : int ret = 0;
481 : :
482 [ # # ]: 0 : if (!connector->dev->registered)
483 : : return 0;
484 : :
485 : 0 : mutex_lock(&connector->mutex);
486 [ # # ]: 0 : if (connector->registration_state != DRM_CONNECTOR_INITIALIZING)
487 : 0 : goto unlock;
488 : :
489 : 0 : ret = drm_sysfs_connector_add(connector);
490 [ # # ]: 0 : if (ret)
491 : 0 : goto unlock;
492 : :
493 : 0 : drm_debugfs_connector_add(connector);
494 : :
495 [ # # ]: 0 : if (connector->funcs->late_register) {
496 : 0 : ret = connector->funcs->late_register(connector);
497 [ # # ]: 0 : if (ret)
498 : 0 : goto err_debugfs;
499 : : }
500 : :
501 : 0 : drm_mode_object_register(connector->dev, &connector->base);
502 : :
503 : 0 : connector->registration_state = DRM_CONNECTOR_REGISTERED;
504 : 0 : goto unlock;
505 : :
506 : : err_debugfs:
507 : 0 : drm_debugfs_connector_remove(connector);
508 : 0 : drm_sysfs_connector_remove(connector);
509 : 0 : unlock:
510 : 0 : mutex_unlock(&connector->mutex);
511 : 0 : return ret;
512 : : }
513 : : EXPORT_SYMBOL(drm_connector_register);
514 : :
515 : : /**
516 : : * drm_connector_unregister - unregister a connector
517 : : * @connector: the connector to unregister
518 : : *
519 : : * Unregister userspace interfaces for a connector. Only call this for
520 : : * connectors which have registered explicitly by calling drm_dev_register(),
521 : : * since connectors are unregistered automatically when drm_dev_unregister() is
522 : : * called.
523 : : */
524 : 0 : void drm_connector_unregister(struct drm_connector *connector)
525 : : {
526 : 0 : mutex_lock(&connector->mutex);
527 [ # # ]: 0 : if (connector->registration_state != DRM_CONNECTOR_REGISTERED) {
528 : 0 : mutex_unlock(&connector->mutex);
529 : 0 : return;
530 : : }
531 : :
532 [ # # ]: 0 : if (connector->funcs->early_unregister)
533 : 0 : connector->funcs->early_unregister(connector);
534 : :
535 : 0 : drm_sysfs_connector_remove(connector);
536 : 0 : drm_debugfs_connector_remove(connector);
537 : :
538 : 0 : connector->registration_state = DRM_CONNECTOR_UNREGISTERED;
539 : 0 : mutex_unlock(&connector->mutex);
540 : : }
541 : : EXPORT_SYMBOL(drm_connector_unregister);
542 : :
543 : 0 : void drm_connector_unregister_all(struct drm_device *dev)
544 : : {
545 : 0 : struct drm_connector *connector;
546 : 0 : struct drm_connector_list_iter conn_iter;
547 : :
548 : 0 : drm_connector_list_iter_begin(dev, &conn_iter);
549 [ # # ]: 0 : drm_for_each_connector_iter(connector, &conn_iter)
550 : 0 : drm_connector_unregister(connector);
551 : 0 : drm_connector_list_iter_end(&conn_iter);
552 : 0 : }
553 : :
554 : 0 : int drm_connector_register_all(struct drm_device *dev)
555 : : {
556 : 0 : struct drm_connector *connector;
557 : 0 : struct drm_connector_list_iter conn_iter;
558 : 0 : int ret = 0;
559 : :
560 : 0 : drm_connector_list_iter_begin(dev, &conn_iter);
561 [ # # ]: 0 : drm_for_each_connector_iter(connector, &conn_iter) {
562 : 0 : ret = drm_connector_register(connector);
563 [ # # ]: 0 : if (ret)
564 : : break;
565 : : }
566 : 0 : drm_connector_list_iter_end(&conn_iter);
567 : :
568 [ # # ]: 0 : if (ret)
569 : 0 : drm_connector_unregister_all(dev);
570 : 0 : return ret;
571 : : }
572 : :
573 : : /**
574 : : * drm_get_connector_status_name - return a string for connector status
575 : : * @status: connector status to compute name of
576 : : *
577 : : * In contrast to the other drm_get_*_name functions this one here returns a
578 : : * const pointer and hence is threadsafe.
579 : : */
580 : 0 : const char *drm_get_connector_status_name(enum drm_connector_status status)
581 : : {
582 [ # # ]: 0 : if (status == connector_status_connected)
583 : : return "connected";
584 [ # # ]: 0 : else if (status == connector_status_disconnected)
585 : : return "disconnected";
586 : : else
587 : 0 : return "unknown";
588 : : }
589 : : EXPORT_SYMBOL(drm_get_connector_status_name);
590 : :
591 : : /**
592 : : * drm_get_connector_force_name - return a string for connector force
593 : : * @force: connector force to get name of
594 : : *
595 : : * Returns: const pointer to name.
596 : : */
597 : 0 : const char *drm_get_connector_force_name(enum drm_connector_force force)
598 : : {
599 [ # # # # ]: 0 : switch (force) {
600 : : case DRM_FORCE_UNSPECIFIED:
601 : : return "unspecified";
602 : : case DRM_FORCE_OFF:
603 : : return "off";
604 : : case DRM_FORCE_ON:
605 : : return "on";
606 : : case DRM_FORCE_ON_DIGITAL:
607 : : return "digital";
608 : : default:
609 : : return "unknown";
610 : : }
611 : : }
612 : :
613 : : #ifdef CONFIG_LOCKDEP
614 : : static struct lockdep_map connector_list_iter_dep_map = {
615 : : .name = "drm_connector_list_iter"
616 : : };
617 : : #endif
618 : :
619 : : /**
620 : : * drm_connector_list_iter_begin - initialize a connector_list iterator
621 : : * @dev: DRM device
622 : : * @iter: connector_list iterator
623 : : *
624 : : * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
625 : : * must always be cleaned up again by calling drm_connector_list_iter_end().
626 : : * Iteration itself happens using drm_connector_list_iter_next() or
627 : : * drm_for_each_connector_iter().
628 : : */
629 : 0 : void drm_connector_list_iter_begin(struct drm_device *dev,
630 : : struct drm_connector_list_iter *iter)
631 : : {
632 : 0 : iter->dev = dev;
633 : 0 : iter->conn = NULL;
634 : 0 : lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
635 : 0 : }
636 : : EXPORT_SYMBOL(drm_connector_list_iter_begin);
637 : :
638 : : /*
639 : : * Extra-safe connector put function that works in any context. Should only be
640 : : * used from the connector_iter functions, where we never really expect to
641 : : * actually release the connector when dropping our final reference.
642 : : */
643 : : static void
644 : 0 : __drm_connector_put_safe(struct drm_connector *conn)
645 : : {
646 : 0 : struct drm_mode_config *config = &conn->dev->mode_config;
647 : :
648 : 0 : lockdep_assert_held(&config->connector_list_lock);
649 : :
650 [ # # ]: 0 : if (!refcount_dec_and_test(&conn->base.refcount.refcount))
651 : : return;
652 : :
653 : 0 : llist_add(&conn->free_node, &config->connector_free_list);
654 : 0 : schedule_work(&config->connector_free_work);
655 : : }
656 : :
657 : : /**
658 : : * drm_connector_list_iter_next - return next connector
659 : : * @iter: connector_list iterator
660 : : *
661 : : * Returns the next connector for @iter, or NULL when the list walk has
662 : : * completed.
663 : : */
664 : : struct drm_connector *
665 : 0 : drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
666 : : {
667 : 0 : struct drm_connector *old_conn = iter->conn;
668 : 0 : struct drm_mode_config *config = &iter->dev->mode_config;
669 : 0 : struct list_head *lhead;
670 : 0 : unsigned long flags;
671 : :
672 : 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
673 [ # # ]: 0 : lhead = old_conn ? &old_conn->head : &config->connector_list;
674 : :
675 : 0 : do {
676 [ # # ]: 0 : if (lhead->next == &config->connector_list) {
677 : 0 : iter->conn = NULL;
678 : 0 : break;
679 : : }
680 : :
681 : 0 : lhead = lhead->next;
682 : 0 : iter->conn = list_entry(lhead, struct drm_connector, head);
683 : :
684 : : /* loop until it's not a zombie connector */
685 [ # # ]: 0 : } while (!kref_get_unless_zero(&iter->conn->base.refcount));
686 : :
687 [ # # ]: 0 : if (old_conn)
688 : 0 : __drm_connector_put_safe(old_conn);
689 : 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
690 : :
691 : 0 : return iter->conn;
692 : : }
693 : : EXPORT_SYMBOL(drm_connector_list_iter_next);
694 : :
695 : : /**
696 : : * drm_connector_list_iter_end - tear down a connector_list iterator
697 : : * @iter: connector_list iterator
698 : : *
699 : : * Tears down @iter and releases any resources (like &drm_connector references)
700 : : * acquired while walking the list. This must always be called, both when the
701 : : * iteration completes fully or when it was aborted without walking the entire
702 : : * list.
703 : : */
704 : 0 : void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
705 : : {
706 : 0 : struct drm_mode_config *config = &iter->dev->mode_config;
707 : 0 : unsigned long flags;
708 : :
709 : 0 : iter->dev = NULL;
710 [ # # ]: 0 : if (iter->conn) {
711 : 0 : spin_lock_irqsave(&config->connector_list_lock, flags);
712 : 0 : __drm_connector_put_safe(iter->conn);
713 : 0 : spin_unlock_irqrestore(&config->connector_list_lock, flags);
714 : : }
715 : 0 : lock_release(&connector_list_iter_dep_map, _RET_IP_);
716 : 0 : }
717 : : EXPORT_SYMBOL(drm_connector_list_iter_end);
718 : :
719 : : static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
720 : : { SubPixelUnknown, "Unknown" },
721 : : { SubPixelHorizontalRGB, "Horizontal RGB" },
722 : : { SubPixelHorizontalBGR, "Horizontal BGR" },
723 : : { SubPixelVerticalRGB, "Vertical RGB" },
724 : : { SubPixelVerticalBGR, "Vertical BGR" },
725 : : { SubPixelNone, "None" },
726 : : };
727 : :
728 : : /**
729 : : * drm_get_subpixel_order_name - return a string for a given subpixel enum
730 : : * @order: enum of subpixel_order
731 : : *
732 : : * Note you could abuse this and return something out of bounds, but that
733 : : * would be a caller error. No unscrubbed user data should make it here.
734 : : */
735 : 0 : const char *drm_get_subpixel_order_name(enum subpixel_order order)
736 : : {
737 : 0 : return drm_subpixel_enum_list[order].name;
738 : : }
739 : : EXPORT_SYMBOL(drm_get_subpixel_order_name);
740 : :
741 : : static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
742 : : { DRM_MODE_DPMS_ON, "On" },
743 : : { DRM_MODE_DPMS_STANDBY, "Standby" },
744 : : { DRM_MODE_DPMS_SUSPEND, "Suspend" },
745 : : { DRM_MODE_DPMS_OFF, "Off" }
746 : : };
747 [ # # # # ]: 0 : DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
748 : :
749 : : static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
750 : : { DRM_MODE_LINK_STATUS_GOOD, "Good" },
751 : : { DRM_MODE_LINK_STATUS_BAD, "Bad" },
752 : : };
753 : :
754 : : /**
755 : : * drm_display_info_set_bus_formats - set the supported bus formats
756 : : * @info: display info to store bus formats in
757 : : * @formats: array containing the supported bus formats
758 : : * @num_formats: the number of entries in the fmts array
759 : : *
760 : : * Store the supported bus formats in display info structure.
761 : : * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
762 : : * a full list of available formats.
763 : : */
764 : 0 : int drm_display_info_set_bus_formats(struct drm_display_info *info,
765 : : const u32 *formats,
766 : : unsigned int num_formats)
767 : : {
768 : 0 : u32 *fmts = NULL;
769 : :
770 [ # # ]: 0 : if (!formats && num_formats)
771 : : return -EINVAL;
772 : :
773 [ # # ]: 0 : if (formats && num_formats) {
774 : 0 : fmts = kmemdup(formats, sizeof(*formats) * num_formats,
775 : : GFP_KERNEL);
776 [ # # ]: 0 : if (!fmts)
777 : : return -ENOMEM;
778 : : }
779 : :
780 : 0 : kfree(info->bus_formats);
781 : 0 : info->bus_formats = fmts;
782 : 0 : info->num_bus_formats = num_formats;
783 : :
784 : 0 : return 0;
785 : : }
786 : : EXPORT_SYMBOL(drm_display_info_set_bus_formats);
787 : :
788 : : /* Optional connector properties. */
789 : : static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
790 : : { DRM_MODE_SCALE_NONE, "None" },
791 : : { DRM_MODE_SCALE_FULLSCREEN, "Full" },
792 : : { DRM_MODE_SCALE_CENTER, "Center" },
793 : : { DRM_MODE_SCALE_ASPECT, "Full aspect" },
794 : : };
795 : :
796 : : static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
797 : : { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
798 : : { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
799 : : { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
800 : : };
801 : :
802 : : static const struct drm_prop_enum_list drm_content_type_enum_list[] = {
803 : : { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" },
804 : : { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" },
805 : : { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" },
806 : : { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" },
807 : : { DRM_MODE_CONTENT_TYPE_GAME, "Game" },
808 : : };
809 : :
810 : : static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
811 : : { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
812 : : { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
813 : : { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
814 : : { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
815 : : };
816 : :
817 : : static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
818 : : { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
819 : : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
820 : : { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
821 : : };
822 [ # # # # ]: 0 : DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
823 : :
824 : : static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
825 : : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
826 : : { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
827 : : { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
828 : : };
829 [ # # # # ]: 0 : DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
830 : : drm_dvi_i_subconnector_enum_list)
831 : :
832 : : static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
833 : : { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
834 : : { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
835 : : { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
836 : : { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
837 : : { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
838 : : };
839 [ # # # # ]: 0 : DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
840 : :
841 : : static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
842 : : { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
843 : : { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
844 : : { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
845 : : { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
846 : : { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
847 : : };
848 [ # # # # ]: 0 : DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
849 : : drm_tv_subconnector_enum_list)
850 : :
851 : : static const struct drm_prop_enum_list hdmi_colorspaces[] = {
852 : : /* For Default case, driver will set the colorspace */
853 : : { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
854 : : /* Standard Definition Colorimetry based on CEA 861 */
855 : : { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" },
856 : : { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
857 : : /* Standard Definition Colorimetry based on IEC 61966-2-4 */
858 : : { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
859 : : /* High Definition Colorimetry based on IEC 61966-2-4 */
860 : : { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
861 : : /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
862 : : { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
863 : : /* Colorimetry based on IEC 61966-2-5 [33] */
864 : : { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
865 : : /* Colorimetry based on IEC 61966-2-5 */
866 : : { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
867 : : /* Colorimetry based on ITU-R BT.2020 */
868 : : { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
869 : : /* Colorimetry based on ITU-R BT.2020 */
870 : : { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
871 : : /* Colorimetry based on ITU-R BT.2020 */
872 : : { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
873 : : /* Added as part of Additional Colorimetry Extension in 861.G */
874 : : { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
875 : : { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" },
876 : : };
877 : :
878 : : /*
879 : : * As per DP 1.4a spec, 2.2.5.7.5 VSC SDP Payload for Pixel Encoding/Colorimetry
880 : : * Format Table 2-120
881 : : */
882 : : static const struct drm_prop_enum_list dp_colorspaces[] = {
883 : : /* For Default case, driver will set the colorspace */
884 : : { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
885 : : { DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED, "RGB_Wide_Gamut_Fixed_Point" },
886 : : /* Colorimetry based on scRGB (IEC 61966-2-2) */
887 : : { DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT, "RGB_Wide_Gamut_Floating_Point" },
888 : : /* Colorimetry based on IEC 61966-2-5 */
889 : : { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
890 : : /* Colorimetry based on SMPTE RP 431-2 */
891 : : { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
892 : : /* Colorimetry based on ITU-R BT.2020 */
893 : : { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
894 : : { DRM_MODE_COLORIMETRY_BT601_YCC, "BT601_YCC" },
895 : : { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
896 : : /* Standard Definition Colorimetry based on IEC 61966-2-4 */
897 : : { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
898 : : /* High Definition Colorimetry based on IEC 61966-2-4 */
899 : : { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
900 : : /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
901 : : { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
902 : : /* Colorimetry based on IEC 61966-2-5 [33] */
903 : : { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
904 : : /* Colorimetry based on ITU-R BT.2020 */
905 : : { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
906 : : /* Colorimetry based on ITU-R BT.2020 */
907 : : { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
908 : : };
909 : :
910 : : /**
911 : : * DOC: standard connector properties
912 : : *
913 : : * DRM connectors have a few standardized properties:
914 : : *
915 : : * EDID:
916 : : * Blob property which contains the current EDID read from the sink. This
917 : : * is useful to parse sink identification information like vendor, model
918 : : * and serial. Drivers should update this property by calling
919 : : * drm_connector_update_edid_property(), usually after having parsed
920 : : * the EDID using drm_add_edid_modes(). Userspace cannot change this
921 : : * property.
922 : : * DPMS:
923 : : * Legacy property for setting the power state of the connector. For atomic
924 : : * drivers this is only provided for backwards compatibility with existing
925 : : * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
926 : : * connector is linked to. Drivers should never set this property directly,
927 : : * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
928 : : * callback. For atomic drivers the remapping to the "ACTIVE" property is
929 : : * implemented in the DRM core. This is the only standard connector
930 : : * property that userspace can change.
931 : : *
932 : : * Note that this property cannot be set through the MODE_ATOMIC ioctl,
933 : : * userspace must use "ACTIVE" on the CRTC instead.
934 : : *
935 : : * WARNING:
936 : : *
937 : : * For userspace also running on legacy drivers the "DPMS" semantics are a
938 : : * lot more complicated. First, userspace cannot rely on the "DPMS" value
939 : : * returned by the GETCONNECTOR actually reflecting reality, because many
940 : : * drivers fail to update it. For atomic drivers this is taken care of in
941 : : * drm_atomic_helper_update_legacy_modeset_state().
942 : : *
943 : : * The second issue is that the DPMS state is only well-defined when the
944 : : * connector is connected to a CRTC. In atomic the DRM core enforces that
945 : : * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
946 : : *
947 : : * Finally, when enabling an output using the legacy SETCONFIG ioctl then
948 : : * "DPMS" is forced to ON. But see above, that might not be reflected in
949 : : * the software value on legacy drivers.
950 : : *
951 : : * Summarizing: Only set "DPMS" when the connector is known to be enabled,
952 : : * assume that a successful SETCONFIG call also sets "DPMS" to on, and
953 : : * never read back the value of "DPMS" because it can be incorrect.
954 : : * PATH:
955 : : * Connector path property to identify how this sink is physically
956 : : * connected. Used by DP MST. This should be set by calling
957 : : * drm_connector_set_path_property(), in the case of DP MST with the
958 : : * path property the MST manager created. Userspace cannot change this
959 : : * property.
960 : : * TILE:
961 : : * Connector tile group property to indicate how a set of DRM connector
962 : : * compose together into one logical screen. This is used by both high-res
963 : : * external screens (often only using a single cable, but exposing multiple
964 : : * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
965 : : * are not gen-locked. Note that for tiled panels which are genlocked, like
966 : : * dual-link LVDS or dual-link DSI, the driver should try to not expose the
967 : : * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
968 : : * should update this value using drm_connector_set_tile_property().
969 : : * Userspace cannot change this property.
970 : : * link-status:
971 : : * Connector link-status property to indicate the status of link. The
972 : : * default value of link-status is "GOOD". If something fails during or
973 : : * after modeset, the kernel driver may set this to "BAD" and issue a
974 : : * hotplug uevent. Drivers should update this value using
975 : : * drm_connector_set_link_status_property().
976 : : * non_desktop:
977 : : * Indicates the output should be ignored for purposes of displaying a
978 : : * standard desktop environment or console. This is most likely because
979 : : * the output device is not rectilinear.
980 : : * Content Protection:
981 : : * This property is used by userspace to request the kernel protect future
982 : : * content communicated over the link. When requested, kernel will apply
983 : : * the appropriate means of protection (most often HDCP), and use the
984 : : * property to tell userspace the protection is active.
985 : : *
986 : : * Drivers can set this up by calling
987 : : * drm_connector_attach_content_protection_property() on initialization.
988 : : *
989 : : * The value of this property can be one of the following:
990 : : *
991 : : * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
992 : : * The link is not protected, content is transmitted in the clear.
993 : : * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
994 : : * Userspace has requested content protection, but the link is not
995 : : * currently protected. When in this state, kernel should enable
996 : : * Content Protection as soon as possible.
997 : : * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
998 : : * Userspace has requested content protection, and the link is
999 : : * protected. Only the driver can set the property to this value.
1000 : : * If userspace attempts to set to ENABLED, kernel will return
1001 : : * -EINVAL.
1002 : : *
1003 : : * A few guidelines:
1004 : : *
1005 : : * - DESIRED state should be preserved until userspace de-asserts it by
1006 : : * setting the property to UNDESIRED. This means ENABLED should only
1007 : : * transition to UNDESIRED when the user explicitly requests it.
1008 : : * - If the state is DESIRED, kernel should attempt to re-authenticate the
1009 : : * link whenever possible. This includes across disable/enable, dpms,
1010 : : * hotplug, downstream device changes, link status failures, etc..
1011 : : * - Kernel sends uevent with the connector id and property id through
1012 : : * @drm_hdcp_update_content_protection, upon below kernel triggered
1013 : : * scenarios:
1014 : : *
1015 : : * - DESIRED -> ENABLED (authentication success)
1016 : : * - ENABLED -> DESIRED (termination of authentication)
1017 : : * - Please note no uevents for userspace triggered property state changes,
1018 : : * which can't fail such as
1019 : : *
1020 : : * - DESIRED/ENABLED -> UNDESIRED
1021 : : * - UNDESIRED -> DESIRED
1022 : : * - Userspace is responsible for polling the property or listen to uevents
1023 : : * to determine when the value transitions from ENABLED to DESIRED.
1024 : : * This signifies the link is no longer protected and userspace should
1025 : : * take appropriate action (whatever that might be).
1026 : : *
1027 : : * HDCP Content Type:
1028 : : * This Enum property is used by the userspace to declare the content type
1029 : : * of the display stream, to kernel. Here display stream stands for any
1030 : : * display content that userspace intended to display through HDCP
1031 : : * encryption.
1032 : : *
1033 : : * Content Type of a stream is decided by the owner of the stream, as
1034 : : * "HDCP Type0" or "HDCP Type1".
1035 : : *
1036 : : * The value of the property can be one of the below:
1037 : : * - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0
1038 : : * - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1
1039 : : *
1040 : : * When kernel starts the HDCP authentication (see "Content Protection"
1041 : : * for details), it uses the content type in "HDCP Content Type"
1042 : : * for performing the HDCP authentication with the display sink.
1043 : : *
1044 : : * Please note in HDCP spec versions, a link can be authenticated with
1045 : : * HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be
1046 : : * authenticated with HDCP1.4 only for Content Type 0(though it is implicit
1047 : : * in nature. As there is no reference for Content Type in HDCP1.4).
1048 : : *
1049 : : * HDCP2.2 authentication protocol itself takes the "Content Type" as a
1050 : : * parameter, which is a input for the DP HDCP2.2 encryption algo.
1051 : : *
1052 : : * In case of Type 0 content protection request, kernel driver can choose
1053 : : * either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for
1054 : : * "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send
1055 : : * that content to a HDCP 1.4 authenticated HDCP sink (Type0 link).
1056 : : * But if the content is classified as "HDCP Type 1", above mentioned
1057 : : * HDCP 2.2 repeater wont send the content to the HDCP sink as it can't
1058 : : * authenticate the HDCP1.4 capable sink for "HDCP Type 1".
1059 : : *
1060 : : * Please note userspace can be ignorant of the HDCP versions used by the
1061 : : * kernel driver to achieve the "HDCP Content Type".
1062 : : *
1063 : : * At current scenario, classifying a content as Type 1 ensures that the
1064 : : * content will be displayed only through the HDCP2.2 encrypted link.
1065 : : *
1066 : : * Note that the HDCP Content Type property is introduced at HDCP 2.2, and
1067 : : * defaults to type 0. It is only exposed by drivers supporting HDCP 2.2
1068 : : * (hence supporting Type 0 and Type 1). Based on how next versions of
1069 : : * HDCP specs are defined content Type could be used for higher versions
1070 : : * too.
1071 : : *
1072 : : * If content type is changed when "Content Protection" is not UNDESIRED,
1073 : : * then kernel will disable the HDCP and re-enable with new type in the
1074 : : * same atomic commit. And when "Content Protection" is ENABLED, it means
1075 : : * that link is HDCP authenticated and encrypted, for the transmission of
1076 : : * the Type of stream mentioned at "HDCP Content Type".
1077 : : *
1078 : : * HDR_OUTPUT_METADATA:
1079 : : * Connector property to enable userspace to send HDR Metadata to
1080 : : * driver. This metadata is based on the composition and blending
1081 : : * policies decided by user, taking into account the hardware and
1082 : : * sink capabilities. The driver gets this metadata and creates a
1083 : : * Dynamic Range and Mastering Infoframe (DRM) in case of HDMI,
1084 : : * SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then
1085 : : * sent to sink. This notifies the sink of the upcoming frame's Color
1086 : : * Encoding and Luminance parameters.
1087 : : *
1088 : : * Userspace first need to detect the HDR capabilities of sink by
1089 : : * reading and parsing the EDID. Details of HDR metadata for HDMI
1090 : : * are added in CTA 861.G spec. For DP , its defined in VESA DP
1091 : : * Standard v1.4. It needs to then get the metadata information
1092 : : * of the video/game/app content which are encoded in HDR (basically
1093 : : * using HDR transfer functions). With this information it needs to
1094 : : * decide on a blending policy and compose the relevant
1095 : : * layers/overlays into a common format. Once this blending is done,
1096 : : * userspace will be aware of the metadata of the composed frame to
1097 : : * be send to sink. It then uses this property to communicate this
1098 : : * metadata to driver which then make a Infoframe packet and sends
1099 : : * to sink based on the type of encoder connected.
1100 : : *
1101 : : * Userspace will be responsible to do Tone mapping operation in case:
1102 : : * - Some layers are HDR and others are SDR
1103 : : * - HDR layers luminance is not same as sink
1104 : : *
1105 : : * It will even need to do colorspace conversion and get all layers
1106 : : * to one common colorspace for blending. It can use either GL, Media
1107 : : * or display engine to get this done based on the capabilties of the
1108 : : * associated hardware.
1109 : : *
1110 : : * Driver expects metadata to be put in &struct hdr_output_metadata
1111 : : * structure from userspace. This is received as blob and stored in
1112 : : * &drm_connector_state.hdr_output_metadata. It parses EDID and saves the
1113 : : * sink metadata in &struct hdr_sink_metadata, as
1114 : : * &drm_connector.hdr_sink_metadata. Driver uses
1115 : : * drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata,
1116 : : * hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of
1117 : : * HDMI encoder.
1118 : : *
1119 : : * max bpc:
1120 : : * This range property is used by userspace to limit the bit depth. When
1121 : : * used the driver would limit the bpc in accordance with the valid range
1122 : : * supported by the hardware and sink. Drivers to use the function
1123 : : * drm_connector_attach_max_bpc_property() to create and attach the
1124 : : * property to the connector during initialization.
1125 : : *
1126 : : * Connectors also have one standardized atomic property:
1127 : : *
1128 : : * CRTC_ID:
1129 : : * Mode object ID of the &drm_crtc this connector should be connected to.
1130 : : *
1131 : : * Connectors for LCD panels may also have one standardized property:
1132 : : *
1133 : : * panel orientation:
1134 : : * On some devices the LCD panel is mounted in the casing in such a way
1135 : : * that the up/top side of the panel does not match with the top side of
1136 : : * the device. Userspace can use this property to check for this.
1137 : : * Note that input coordinates from touchscreens (input devices with
1138 : : * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
1139 : : * coordinates, so if userspace rotates the picture to adjust for
1140 : : * the orientation it must also apply the same transformation to the
1141 : : * touchscreen input coordinates. This property is initialized by calling
1142 : : * drm_connector_init_panel_orientation_property().
1143 : : *
1144 : : * scaling mode:
1145 : : * This property defines how a non-native mode is upscaled to the native
1146 : : * mode of an LCD panel:
1147 : : *
1148 : : * None:
1149 : : * No upscaling happens, scaling is left to the panel. Not all
1150 : : * drivers expose this mode.
1151 : : * Full:
1152 : : * The output is upscaled to the full resolution of the panel,
1153 : : * ignoring the aspect ratio.
1154 : : * Center:
1155 : : * No upscaling happens, the output is centered within the native
1156 : : * resolution the panel.
1157 : : * Full aspect:
1158 : : * The output is upscaled to maximize either the width or height
1159 : : * while retaining the aspect ratio.
1160 : : *
1161 : : * This property should be set up by calling
1162 : : * drm_connector_attach_scaling_mode_property(). Note that drivers
1163 : : * can also expose this property to external outputs, in which case they
1164 : : * must support "None", which should be the default (since external screens
1165 : : * have a built-in scaler).
1166 : : */
1167 : :
1168 : 0 : int drm_connector_create_standard_properties(struct drm_device *dev)
1169 : : {
1170 : 0 : struct drm_property *prop;
1171 : :
1172 : 0 : prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1173 : : DRM_MODE_PROP_IMMUTABLE,
1174 : : "EDID", 0);
1175 [ # # ]: 0 : if (!prop)
1176 : : return -ENOMEM;
1177 : 0 : dev->mode_config.edid_property = prop;
1178 : :
1179 : 0 : prop = drm_property_create_enum(dev, 0,
1180 : : "DPMS", drm_dpms_enum_list,
1181 : : ARRAY_SIZE(drm_dpms_enum_list));
1182 [ # # ]: 0 : if (!prop)
1183 : : return -ENOMEM;
1184 : 0 : dev->mode_config.dpms_property = prop;
1185 : :
1186 : 0 : prop = drm_property_create(dev,
1187 : : DRM_MODE_PROP_BLOB |
1188 : : DRM_MODE_PROP_IMMUTABLE,
1189 : : "PATH", 0);
1190 [ # # ]: 0 : if (!prop)
1191 : : return -ENOMEM;
1192 : 0 : dev->mode_config.path_property = prop;
1193 : :
1194 : 0 : prop = drm_property_create(dev,
1195 : : DRM_MODE_PROP_BLOB |
1196 : : DRM_MODE_PROP_IMMUTABLE,
1197 : : "TILE", 0);
1198 [ # # ]: 0 : if (!prop)
1199 : : return -ENOMEM;
1200 : 0 : dev->mode_config.tile_property = prop;
1201 : :
1202 : 0 : prop = drm_property_create_enum(dev, 0, "link-status",
1203 : : drm_link_status_enum_list,
1204 : : ARRAY_SIZE(drm_link_status_enum_list));
1205 [ # # ]: 0 : if (!prop)
1206 : : return -ENOMEM;
1207 : 0 : dev->mode_config.link_status_property = prop;
1208 : :
1209 : 0 : prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
1210 [ # # ]: 0 : if (!prop)
1211 : : return -ENOMEM;
1212 : 0 : dev->mode_config.non_desktop_property = prop;
1213 : :
1214 : 0 : prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
1215 : : "HDR_OUTPUT_METADATA", 0);
1216 [ # # ]: 0 : if (!prop)
1217 : : return -ENOMEM;
1218 : 0 : dev->mode_config.hdr_output_metadata_property = prop;
1219 : :
1220 : 0 : return 0;
1221 : : }
1222 : :
1223 : : /**
1224 : : * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1225 : : * @dev: DRM device
1226 : : *
1227 : : * Called by a driver the first time a DVI-I connector is made.
1228 : : */
1229 : 0 : int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1230 : : {
1231 : 0 : struct drm_property *dvi_i_selector;
1232 : 0 : struct drm_property *dvi_i_subconnector;
1233 : :
1234 [ # # ]: 0 : if (dev->mode_config.dvi_i_select_subconnector_property)
1235 : : return 0;
1236 : :
1237 : 0 : dvi_i_selector =
1238 : 0 : drm_property_create_enum(dev, 0,
1239 : : "select subconnector",
1240 : : drm_dvi_i_select_enum_list,
1241 : : ARRAY_SIZE(drm_dvi_i_select_enum_list));
1242 : 0 : dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1243 : :
1244 : 0 : dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1245 : : "subconnector",
1246 : : drm_dvi_i_subconnector_enum_list,
1247 : : ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1248 : 0 : dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1249 : :
1250 : 0 : return 0;
1251 : : }
1252 : : EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1253 : :
1254 : : /**
1255 : : * DOC: HDMI connector properties
1256 : : *
1257 : : * content type (HDMI specific):
1258 : : * Indicates content type setting to be used in HDMI infoframes to indicate
1259 : : * content type for the external device, so that it adjusts its display
1260 : : * settings accordingly.
1261 : : *
1262 : : * The value of this property can be one of the following:
1263 : : *
1264 : : * No Data:
1265 : : * Content type is unknown
1266 : : * Graphics:
1267 : : * Content type is graphics
1268 : : * Photo:
1269 : : * Content type is photo
1270 : : * Cinema:
1271 : : * Content type is cinema
1272 : : * Game:
1273 : : * Content type is game
1274 : : *
1275 : : * Drivers can set up this property by calling
1276 : : * drm_connector_attach_content_type_property(). Decoding to
1277 : : * infoframe values is done through drm_hdmi_avi_infoframe_content_type().
1278 : : */
1279 : :
1280 : : /**
1281 : : * drm_connector_attach_content_type_property - attach content-type property
1282 : : * @connector: connector to attach content type property on.
1283 : : *
1284 : : * Called by a driver the first time a HDMI connector is made.
1285 : : */
1286 : 0 : int drm_connector_attach_content_type_property(struct drm_connector *connector)
1287 : : {
1288 [ # # ]: 0 : if (!drm_mode_create_content_type_property(connector->dev))
1289 : 0 : drm_object_attach_property(&connector->base,
1290 : 0 : connector->dev->mode_config.content_type_property,
1291 : : DRM_MODE_CONTENT_TYPE_NO_DATA);
1292 : 0 : return 0;
1293 : : }
1294 : : EXPORT_SYMBOL(drm_connector_attach_content_type_property);
1295 : :
1296 : :
1297 : : /**
1298 : : * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe
1299 : : * content type information, based
1300 : : * on correspondent DRM property.
1301 : : * @frame: HDMI AVI infoframe
1302 : : * @conn_state: DRM display connector state
1303 : : *
1304 : : */
1305 : 0 : void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1306 : : const struct drm_connector_state *conn_state)
1307 : : {
1308 [ # # # # : 0 : switch (conn_state->content_type) {
# ]
1309 : 0 : case DRM_MODE_CONTENT_TYPE_GRAPHICS:
1310 : 0 : frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1311 : 0 : break;
1312 : 0 : case DRM_MODE_CONTENT_TYPE_CINEMA:
1313 : 0 : frame->content_type = HDMI_CONTENT_TYPE_CINEMA;
1314 : 0 : break;
1315 : 0 : case DRM_MODE_CONTENT_TYPE_GAME:
1316 : 0 : frame->content_type = HDMI_CONTENT_TYPE_GAME;
1317 : 0 : break;
1318 : 0 : case DRM_MODE_CONTENT_TYPE_PHOTO:
1319 : 0 : frame->content_type = HDMI_CONTENT_TYPE_PHOTO;
1320 : 0 : break;
1321 : 0 : default:
1322 : : /* Graphics is the default(0) */
1323 : 0 : frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1324 : : }
1325 : :
1326 : 0 : frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA;
1327 : 0 : }
1328 : : EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type);
1329 : :
1330 : : /**
1331 : : * drm_mode_attach_tv_margin_properties - attach TV connector margin properties
1332 : : * @connector: DRM connector
1333 : : *
1334 : : * Called by a driver when it needs to attach TV margin props to a connector.
1335 : : * Typically used on SDTV and HDMI connectors.
1336 : : */
1337 : 0 : void drm_connector_attach_tv_margin_properties(struct drm_connector *connector)
1338 : : {
1339 : 0 : struct drm_device *dev = connector->dev;
1340 : :
1341 : 0 : drm_object_attach_property(&connector->base,
1342 : : dev->mode_config.tv_left_margin_property,
1343 : : 0);
1344 : 0 : drm_object_attach_property(&connector->base,
1345 : : dev->mode_config.tv_right_margin_property,
1346 : : 0);
1347 : 0 : drm_object_attach_property(&connector->base,
1348 : : dev->mode_config.tv_top_margin_property,
1349 : : 0);
1350 : 0 : drm_object_attach_property(&connector->base,
1351 : : dev->mode_config.tv_bottom_margin_property,
1352 : : 0);
1353 : 0 : }
1354 : : EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties);
1355 : :
1356 : : /**
1357 : : * drm_mode_create_tv_margin_properties - create TV connector margin properties
1358 : : * @dev: DRM device
1359 : : *
1360 : : * Called by a driver's HDMI connector initialization routine, this function
1361 : : * creates the TV margin properties for a given device. No need to call this
1362 : : * function for an SDTV connector, it's already called from
1363 : : * drm_mode_create_tv_properties().
1364 : : */
1365 : 0 : int drm_mode_create_tv_margin_properties(struct drm_device *dev)
1366 : : {
1367 [ # # ]: 0 : if (dev->mode_config.tv_left_margin_property)
1368 : : return 0;
1369 : :
1370 : 0 : dev->mode_config.tv_left_margin_property =
1371 : 0 : drm_property_create_range(dev, 0, "left margin", 0, 100);
1372 [ # # ]: 0 : if (!dev->mode_config.tv_left_margin_property)
1373 : : return -ENOMEM;
1374 : :
1375 : 0 : dev->mode_config.tv_right_margin_property =
1376 : 0 : drm_property_create_range(dev, 0, "right margin", 0, 100);
1377 [ # # ]: 0 : if (!dev->mode_config.tv_right_margin_property)
1378 : : return -ENOMEM;
1379 : :
1380 : 0 : dev->mode_config.tv_top_margin_property =
1381 : 0 : drm_property_create_range(dev, 0, "top margin", 0, 100);
1382 [ # # ]: 0 : if (!dev->mode_config.tv_top_margin_property)
1383 : : return -ENOMEM;
1384 : :
1385 : 0 : dev->mode_config.tv_bottom_margin_property =
1386 : 0 : drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1387 [ # # ]: 0 : if (!dev->mode_config.tv_bottom_margin_property)
1388 : 0 : return -ENOMEM;
1389 : :
1390 : : return 0;
1391 : : }
1392 : : EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
1393 : :
1394 : : /**
1395 : : * drm_mode_create_tv_properties - create TV specific connector properties
1396 : : * @dev: DRM device
1397 : : * @num_modes: number of different TV formats (modes) supported
1398 : : * @modes: array of pointers to strings containing name of each format
1399 : : *
1400 : : * Called by a driver's TV initialization routine, this function creates
1401 : : * the TV specific connector properties for a given device. Caller is
1402 : : * responsible for allocating a list of format names and passing them to
1403 : : * this routine.
1404 : : */
1405 : 0 : int drm_mode_create_tv_properties(struct drm_device *dev,
1406 : : unsigned int num_modes,
1407 : : const char * const modes[])
1408 : : {
1409 : 0 : struct drm_property *tv_selector;
1410 : 0 : struct drm_property *tv_subconnector;
1411 : 0 : unsigned int i;
1412 : :
1413 [ # # ]: 0 : if (dev->mode_config.tv_select_subconnector_property)
1414 : : return 0;
1415 : :
1416 : : /*
1417 : : * Basic connector properties
1418 : : */
1419 : 0 : tv_selector = drm_property_create_enum(dev, 0,
1420 : : "select subconnector",
1421 : : drm_tv_select_enum_list,
1422 : : ARRAY_SIZE(drm_tv_select_enum_list));
1423 [ # # ]: 0 : if (!tv_selector)
1424 : 0 : goto nomem;
1425 : :
1426 : 0 : dev->mode_config.tv_select_subconnector_property = tv_selector;
1427 : :
1428 : 0 : tv_subconnector =
1429 : 0 : drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1430 : : "subconnector",
1431 : : drm_tv_subconnector_enum_list,
1432 : : ARRAY_SIZE(drm_tv_subconnector_enum_list));
1433 [ # # ]: 0 : if (!tv_subconnector)
1434 : 0 : goto nomem;
1435 : 0 : dev->mode_config.tv_subconnector_property = tv_subconnector;
1436 : :
1437 : : /*
1438 : : * Other, TV specific properties: margins & TV modes.
1439 : : */
1440 [ # # ]: 0 : if (drm_mode_create_tv_margin_properties(dev))
1441 : 0 : goto nomem;
1442 : :
1443 : 0 : dev->mode_config.tv_mode_property =
1444 : 0 : drm_property_create(dev, DRM_MODE_PROP_ENUM,
1445 : : "mode", num_modes);
1446 [ # # ]: 0 : if (!dev->mode_config.tv_mode_property)
1447 : 0 : goto nomem;
1448 : :
1449 [ # # ]: 0 : for (i = 0; i < num_modes; i++)
1450 : 0 : drm_property_add_enum(dev->mode_config.tv_mode_property,
1451 : 0 : i, modes[i]);
1452 : :
1453 : 0 : dev->mode_config.tv_brightness_property =
1454 : 0 : drm_property_create_range(dev, 0, "brightness", 0, 100);
1455 [ # # ]: 0 : if (!dev->mode_config.tv_brightness_property)
1456 : 0 : goto nomem;
1457 : :
1458 : 0 : dev->mode_config.tv_contrast_property =
1459 : 0 : drm_property_create_range(dev, 0, "contrast", 0, 100);
1460 [ # # ]: 0 : if (!dev->mode_config.tv_contrast_property)
1461 : 0 : goto nomem;
1462 : :
1463 : 0 : dev->mode_config.tv_flicker_reduction_property =
1464 : 0 : drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1465 [ # # ]: 0 : if (!dev->mode_config.tv_flicker_reduction_property)
1466 : 0 : goto nomem;
1467 : :
1468 : 0 : dev->mode_config.tv_overscan_property =
1469 : 0 : drm_property_create_range(dev, 0, "overscan", 0, 100);
1470 [ # # ]: 0 : if (!dev->mode_config.tv_overscan_property)
1471 : 0 : goto nomem;
1472 : :
1473 : 0 : dev->mode_config.tv_saturation_property =
1474 : 0 : drm_property_create_range(dev, 0, "saturation", 0, 100);
1475 [ # # ]: 0 : if (!dev->mode_config.tv_saturation_property)
1476 : 0 : goto nomem;
1477 : :
1478 : 0 : dev->mode_config.tv_hue_property =
1479 : 0 : drm_property_create_range(dev, 0, "hue", 0, 100);
1480 [ # # ]: 0 : if (!dev->mode_config.tv_hue_property)
1481 : 0 : goto nomem;
1482 : :
1483 : : return 0;
1484 : : nomem:
1485 : : return -ENOMEM;
1486 : : }
1487 : : EXPORT_SYMBOL(drm_mode_create_tv_properties);
1488 : :
1489 : : /**
1490 : : * drm_mode_create_scaling_mode_property - create scaling mode property
1491 : : * @dev: DRM device
1492 : : *
1493 : : * Called by a driver the first time it's needed, must be attached to desired
1494 : : * connectors.
1495 : : *
1496 : : * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1497 : : * instead to correctly assign &drm_connector_state.picture_aspect_ratio
1498 : : * in the atomic state.
1499 : : */
1500 : 0 : int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1501 : : {
1502 : 0 : struct drm_property *scaling_mode;
1503 : :
1504 [ # # ]: 0 : if (dev->mode_config.scaling_mode_property)
1505 : : return 0;
1506 : :
1507 : 0 : scaling_mode =
1508 : 0 : drm_property_create_enum(dev, 0, "scaling mode",
1509 : : drm_scaling_mode_enum_list,
1510 : : ARRAY_SIZE(drm_scaling_mode_enum_list));
1511 : :
1512 : 0 : dev->mode_config.scaling_mode_property = scaling_mode;
1513 : :
1514 : 0 : return 0;
1515 : : }
1516 : : EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1517 : :
1518 : : /**
1519 : : * DOC: Variable refresh properties
1520 : : *
1521 : : * Variable refresh rate capable displays can dynamically adjust their
1522 : : * refresh rate by extending the duration of their vertical front porch
1523 : : * until page flip or timeout occurs. This can reduce or remove stuttering
1524 : : * and latency in scenarios where the page flip does not align with the
1525 : : * vblank interval.
1526 : : *
1527 : : * An example scenario would be an application flipping at a constant rate
1528 : : * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank
1529 : : * interval and the same contents will be displayed twice. This can be
1530 : : * observed as stuttering for content with motion.
1531 : : *
1532 : : * If variable refresh rate was active on a display that supported a
1533 : : * variable refresh range from 35Hz to 60Hz no stuttering would be observable
1534 : : * for the example scenario. The minimum supported variable refresh rate of
1535 : : * 35Hz is below the page flip frequency and the vertical front porch can
1536 : : * be extended until the page flip occurs. The vblank interval will be
1537 : : * directly aligned to the page flip rate.
1538 : : *
1539 : : * Not all userspace content is suitable for use with variable refresh rate.
1540 : : * Large and frequent changes in vertical front porch duration may worsen
1541 : : * perceived stuttering for input sensitive applications.
1542 : : *
1543 : : * Panel brightness will also vary with vertical front porch duration. Some
1544 : : * panels may have noticeable differences in brightness between the minimum
1545 : : * vertical front porch duration and the maximum vertical front porch duration.
1546 : : * Large and frequent changes in vertical front porch duration may produce
1547 : : * observable flickering for such panels.
1548 : : *
1549 : : * Userspace control for variable refresh rate is supported via properties
1550 : : * on the &drm_connector and &drm_crtc objects.
1551 : : *
1552 : : * "vrr_capable":
1553 : : * Optional &drm_connector boolean property that drivers should attach
1554 : : * with drm_connector_attach_vrr_capable_property() on connectors that
1555 : : * could support variable refresh rates. Drivers should update the
1556 : : * property value by calling drm_connector_set_vrr_capable_property().
1557 : : *
1558 : : * Absence of the property should indicate absence of support.
1559 : : *
1560 : : * "VRR_ENABLED":
1561 : : * Default &drm_crtc boolean property that notifies the driver that the
1562 : : * content on the CRTC is suitable for variable refresh rate presentation.
1563 : : * The driver will take this property as a hint to enable variable
1564 : : * refresh rate support if the receiver supports it, ie. if the
1565 : : * "vrr_capable" property is true on the &drm_connector object. The
1566 : : * vertical front porch duration will be extended until page-flip or
1567 : : * timeout when enabled.
1568 : : *
1569 : : * The minimum vertical front porch duration is defined as the vertical
1570 : : * front porch duration for the current mode.
1571 : : *
1572 : : * The maximum vertical front porch duration is greater than or equal to
1573 : : * the minimum vertical front porch duration. The duration is derived
1574 : : * from the minimum supported variable refresh rate for the connector.
1575 : : *
1576 : : * The driver may place further restrictions within these minimum
1577 : : * and maximum bounds.
1578 : : */
1579 : :
1580 : : /**
1581 : : * drm_connector_attach_vrr_capable_property - creates the
1582 : : * vrr_capable property
1583 : : * @connector: connector to create the vrr_capable property on.
1584 : : *
1585 : : * This is used by atomic drivers to add support for querying
1586 : : * variable refresh rate capability for a connector.
1587 : : *
1588 : : * Returns:
1589 : : * Zero on success, negative errono on failure.
1590 : : */
1591 : 0 : int drm_connector_attach_vrr_capable_property(
1592 : : struct drm_connector *connector)
1593 : : {
1594 : 0 : struct drm_device *dev = connector->dev;
1595 : 0 : struct drm_property *prop;
1596 : :
1597 [ # # ]: 0 : if (!connector->vrr_capable_property) {
1598 : 0 : prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE,
1599 : : "vrr_capable");
1600 [ # # ]: 0 : if (!prop)
1601 : : return -ENOMEM;
1602 : :
1603 : 0 : connector->vrr_capable_property = prop;
1604 : 0 : drm_object_attach_property(&connector->base, prop, 0);
1605 : : }
1606 : :
1607 : : return 0;
1608 : : }
1609 : : EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property);
1610 : :
1611 : : /**
1612 : : * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1613 : : * @connector: connector to attach scaling mode property on.
1614 : : * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1615 : : *
1616 : : * This is used to add support for scaling mode to atomic drivers.
1617 : : * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
1618 : : * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1619 : : *
1620 : : * This is the atomic version of drm_mode_create_scaling_mode_property().
1621 : : *
1622 : : * Returns:
1623 : : * Zero on success, negative errno on failure.
1624 : : */
1625 : 0 : int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1626 : : u32 scaling_mode_mask)
1627 : : {
1628 : 0 : struct drm_device *dev = connector->dev;
1629 : 0 : struct drm_property *scaling_mode_property;
1630 : 0 : int i;
1631 : 0 : const unsigned valid_scaling_mode_mask =
1632 : : (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1633 : :
1634 [ # # # # : 0 : if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
# # # # #
# # # ]
1635 : : scaling_mode_mask & ~valid_scaling_mode_mask))
1636 : : return -EINVAL;
1637 : :
1638 : 0 : scaling_mode_property =
1639 [ # # ]: 0 : drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1640 : 0 : hweight32(scaling_mode_mask));
1641 : :
1642 [ # # ]: 0 : if (!scaling_mode_property)
1643 : : return -ENOMEM;
1644 : :
1645 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1646 : 0 : int ret;
1647 : :
1648 [ # # ]: 0 : if (!(BIT(i) & scaling_mode_mask))
1649 : 0 : continue;
1650 : :
1651 : 0 : ret = drm_property_add_enum(scaling_mode_property,
1652 : 0 : drm_scaling_mode_enum_list[i].type,
1653 : : drm_scaling_mode_enum_list[i].name);
1654 : :
1655 [ # # ]: 0 : if (ret) {
1656 : 0 : drm_property_destroy(dev, scaling_mode_property);
1657 : :
1658 : 0 : return ret;
1659 : : }
1660 : : }
1661 : :
1662 : 0 : drm_object_attach_property(&connector->base,
1663 : : scaling_mode_property, 0);
1664 : :
1665 : 0 : connector->scaling_mode_property = scaling_mode_property;
1666 : :
1667 : 0 : return 0;
1668 : : }
1669 : : EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1670 : :
1671 : : /**
1672 : : * drm_mode_create_aspect_ratio_property - create aspect ratio property
1673 : : * @dev: DRM device
1674 : : *
1675 : : * Called by a driver the first time it's needed, must be attached to desired
1676 : : * connectors.
1677 : : *
1678 : : * Returns:
1679 : : * Zero on success, negative errno on failure.
1680 : : */
1681 : 0 : int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1682 : : {
1683 [ # # ]: 0 : if (dev->mode_config.aspect_ratio_property)
1684 : : return 0;
1685 : :
1686 : 0 : dev->mode_config.aspect_ratio_property =
1687 : 0 : drm_property_create_enum(dev, 0, "aspect ratio",
1688 : : drm_aspect_ratio_enum_list,
1689 : : ARRAY_SIZE(drm_aspect_ratio_enum_list));
1690 : :
1691 [ # # ]: 0 : if (dev->mode_config.aspect_ratio_property == NULL)
1692 : 0 : return -ENOMEM;
1693 : :
1694 : : return 0;
1695 : : }
1696 : : EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1697 : :
1698 : : /**
1699 : : * DOC: standard connector properties
1700 : : *
1701 : : * Colorspace:
1702 : : * This property helps select a suitable colorspace based on the sink
1703 : : * capability. Modern sink devices support wider gamut like BT2020.
1704 : : * This helps switch to BT2020 mode if the BT2020 encoded video stream
1705 : : * is being played by the user, same for any other colorspace. Thereby
1706 : : * giving a good visual experience to users.
1707 : : *
1708 : : * The expectation from userspace is that it should parse the EDID
1709 : : * and get supported colorspaces. Use this property and switch to the
1710 : : * one supported. Sink supported colorspaces should be retrieved by
1711 : : * userspace from EDID and driver will not explicitly expose them.
1712 : : *
1713 : : * Basically the expectation from userspace is:
1714 : : * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
1715 : : * colorspace
1716 : : * - Set this new property to let the sink know what it
1717 : : * converted the CRTC output to.
1718 : : * - This property is just to inform sink what colorspace
1719 : : * source is trying to drive.
1720 : : *
1721 : : * Because between HDMI and DP have different colorspaces,
1722 : : * drm_mode_create_hdmi_colorspace_property() is used for HDMI connector and
1723 : : * drm_mode_create_dp_colorspace_property() is used for DP connector.
1724 : : */
1725 : :
1726 : : /**
1727 : : * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property
1728 : : * @connector: connector to create the Colorspace property on.
1729 : : *
1730 : : * Called by a driver the first time it's needed, must be attached to desired
1731 : : * HDMI connectors.
1732 : : *
1733 : : * Returns:
1734 : : * Zero on success, negative errono on failure.
1735 : : */
1736 : 0 : int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector)
1737 : : {
1738 : 0 : struct drm_device *dev = connector->dev;
1739 : :
1740 [ # # ]: 0 : if (connector->colorspace_property)
1741 : : return 0;
1742 : :
1743 : 0 : connector->colorspace_property =
1744 : 0 : drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
1745 : : hdmi_colorspaces,
1746 : : ARRAY_SIZE(hdmi_colorspaces));
1747 : :
1748 [ # # ]: 0 : if (!connector->colorspace_property)
1749 : 0 : return -ENOMEM;
1750 : :
1751 : : return 0;
1752 : : }
1753 : : EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property);
1754 : :
1755 : : /**
1756 : : * drm_mode_create_dp_colorspace_property - create dp colorspace property
1757 : : * @connector: connector to create the Colorspace property on.
1758 : : *
1759 : : * Called by a driver the first time it's needed, must be attached to desired
1760 : : * DP connectors.
1761 : : *
1762 : : * Returns:
1763 : : * Zero on success, negative errono on failure.
1764 : : */
1765 : 0 : int drm_mode_create_dp_colorspace_property(struct drm_connector *connector)
1766 : : {
1767 : 0 : struct drm_device *dev = connector->dev;
1768 : :
1769 [ # # ]: 0 : if (connector->colorspace_property)
1770 : : return 0;
1771 : :
1772 : 0 : connector->colorspace_property =
1773 : 0 : drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
1774 : : dp_colorspaces,
1775 : : ARRAY_SIZE(dp_colorspaces));
1776 : :
1777 [ # # ]: 0 : if (!connector->colorspace_property)
1778 : 0 : return -ENOMEM;
1779 : :
1780 : : return 0;
1781 : : }
1782 : : EXPORT_SYMBOL(drm_mode_create_dp_colorspace_property);
1783 : :
1784 : : /**
1785 : : * drm_mode_create_content_type_property - create content type property
1786 : : * @dev: DRM device
1787 : : *
1788 : : * Called by a driver the first time it's needed, must be attached to desired
1789 : : * connectors.
1790 : : *
1791 : : * Returns:
1792 : : * Zero on success, negative errno on failure.
1793 : : */
1794 : 0 : int drm_mode_create_content_type_property(struct drm_device *dev)
1795 : : {
1796 [ # # ]: 0 : if (dev->mode_config.content_type_property)
1797 : : return 0;
1798 : :
1799 : 0 : dev->mode_config.content_type_property =
1800 : 0 : drm_property_create_enum(dev, 0, "content type",
1801 : : drm_content_type_enum_list,
1802 : : ARRAY_SIZE(drm_content_type_enum_list));
1803 : :
1804 [ # # ]: 0 : if (dev->mode_config.content_type_property == NULL)
1805 : 0 : return -ENOMEM;
1806 : :
1807 : : return 0;
1808 : : }
1809 : : EXPORT_SYMBOL(drm_mode_create_content_type_property);
1810 : :
1811 : : /**
1812 : : * drm_mode_create_suggested_offset_properties - create suggests offset properties
1813 : : * @dev: DRM device
1814 : : *
1815 : : * Create the the suggested x/y offset property for connectors.
1816 : : */
1817 : 0 : int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1818 : : {
1819 [ # # # # ]: 0 : if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1820 : : return 0;
1821 : :
1822 : 0 : dev->mode_config.suggested_x_property =
1823 : 0 : drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1824 : :
1825 : 0 : dev->mode_config.suggested_y_property =
1826 : 0 : drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1827 : :
1828 [ # # # # ]: 0 : if (dev->mode_config.suggested_x_property == NULL ||
1829 : : dev->mode_config.suggested_y_property == NULL)
1830 : 0 : return -ENOMEM;
1831 : : return 0;
1832 : : }
1833 : : EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1834 : :
1835 : : /**
1836 : : * drm_connector_set_path_property - set tile property on connector
1837 : : * @connector: connector to set property on.
1838 : : * @path: path to use for property; must not be NULL.
1839 : : *
1840 : : * This creates a property to expose to userspace to specify a
1841 : : * connector path. This is mainly used for DisplayPort MST where
1842 : : * connectors have a topology and we want to allow userspace to give
1843 : : * them more meaningful names.
1844 : : *
1845 : : * Returns:
1846 : : * Zero on success, negative errno on failure.
1847 : : */
1848 : 0 : int drm_connector_set_path_property(struct drm_connector *connector,
1849 : : const char *path)
1850 : : {
1851 : 0 : struct drm_device *dev = connector->dev;
1852 : 0 : int ret;
1853 : :
1854 : 0 : ret = drm_property_replace_global_blob(dev,
1855 : : &connector->path_blob_ptr,
1856 : 0 : strlen(path) + 1,
1857 : : path,
1858 : : &connector->base,
1859 : : dev->mode_config.path_property);
1860 : 0 : return ret;
1861 : : }
1862 : : EXPORT_SYMBOL(drm_connector_set_path_property);
1863 : :
1864 : : /**
1865 : : * drm_connector_set_tile_property - set tile property on connector
1866 : : * @connector: connector to set property on.
1867 : : *
1868 : : * This looks up the tile information for a connector, and creates a
1869 : : * property for userspace to parse if it exists. The property is of
1870 : : * the form of 8 integers using ':' as a separator.
1871 : : * This is used for dual port tiled displays with DisplayPort SST
1872 : : * or DisplayPort MST connectors.
1873 : : *
1874 : : * Returns:
1875 : : * Zero on success, errno on failure.
1876 : : */
1877 : 0 : int drm_connector_set_tile_property(struct drm_connector *connector)
1878 : : {
1879 : 0 : struct drm_device *dev = connector->dev;
1880 : 0 : char tile[256];
1881 : 0 : int ret;
1882 : :
1883 [ # # ]: 0 : if (!connector->has_tile) {
1884 : 0 : ret = drm_property_replace_global_blob(dev,
1885 : : &connector->tile_blob_ptr,
1886 : : 0,
1887 : : NULL,
1888 : : &connector->base,
1889 : : dev->mode_config.tile_property);
1890 : 0 : return ret;
1891 : : }
1892 : :
1893 : 0 : snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
1894 : 0 : connector->tile_group->id, connector->tile_is_single_monitor,
1895 : 0 : connector->num_h_tile, connector->num_v_tile,
1896 : 0 : connector->tile_h_loc, connector->tile_v_loc,
1897 : 0 : connector->tile_h_size, connector->tile_v_size);
1898 : :
1899 : 0 : ret = drm_property_replace_global_blob(dev,
1900 : : &connector->tile_blob_ptr,
1901 : 0 : strlen(tile) + 1,
1902 : : tile,
1903 : : &connector->base,
1904 : : dev->mode_config.tile_property);
1905 : 0 : return ret;
1906 : : }
1907 : : EXPORT_SYMBOL(drm_connector_set_tile_property);
1908 : :
1909 : : /**
1910 : : * drm_connector_update_edid_property - update the edid property of a connector
1911 : : * @connector: drm connector
1912 : : * @edid: new value of the edid property
1913 : : *
1914 : : * This function creates a new blob modeset object and assigns its id to the
1915 : : * connector's edid property.
1916 : : * Since we also parse tile information from EDID's displayID block, we also
1917 : : * set the connector's tile property here. See drm_connector_set_tile_property()
1918 : : * for more details.
1919 : : *
1920 : : * Returns:
1921 : : * Zero on success, negative errno on failure.
1922 : : */
1923 : 0 : int drm_connector_update_edid_property(struct drm_connector *connector,
1924 : : const struct edid *edid)
1925 : : {
1926 : 0 : struct drm_device *dev = connector->dev;
1927 : 0 : size_t size = 0;
1928 : 0 : int ret;
1929 : :
1930 : : /* ignore requests to set edid when overridden */
1931 [ # # ]: 0 : if (connector->override_edid)
1932 : : return 0;
1933 : :
1934 [ # # ]: 0 : if (edid)
1935 : 0 : size = EDID_LENGTH * (1 + edid->extensions);
1936 : :
1937 : : /* Set the display info, using edid if available, otherwise
1938 : : * reseting the values to defaults. This duplicates the work
1939 : : * done in drm_add_edid_modes, but that function is not
1940 : : * consistently called before this one in all drivers and the
1941 : : * computation is cheap enough that it seems better to
1942 : : * duplicate it rather than attempt to ensure some arbitrary
1943 : : * ordering of calls.
1944 : : */
1945 [ # # ]: 0 : if (edid)
1946 : 0 : drm_add_display_info(connector, edid);
1947 : : else
1948 : 0 : drm_reset_display_info(connector);
1949 : :
1950 : 0 : drm_object_property_set_value(&connector->base,
1951 : : dev->mode_config.non_desktop_property,
1952 : 0 : connector->display_info.non_desktop);
1953 : :
1954 : 0 : ret = drm_property_replace_global_blob(dev,
1955 : : &connector->edid_blob_ptr,
1956 : : size,
1957 : : edid,
1958 : : &connector->base,
1959 : : dev->mode_config.edid_property);
1960 [ # # ]: 0 : if (ret)
1961 : : return ret;
1962 : 0 : return drm_connector_set_tile_property(connector);
1963 : : }
1964 : : EXPORT_SYMBOL(drm_connector_update_edid_property);
1965 : :
1966 : : /**
1967 : : * drm_connector_set_link_status_property - Set link status property of a connector
1968 : : * @connector: drm connector
1969 : : * @link_status: new value of link status property (0: Good, 1: Bad)
1970 : : *
1971 : : * In usual working scenario, this link status property will always be set to
1972 : : * "GOOD". If something fails during or after a mode set, the kernel driver
1973 : : * may set this link status property to "BAD". The caller then needs to send a
1974 : : * hotplug uevent for userspace to re-check the valid modes through
1975 : : * GET_CONNECTOR_IOCTL and retry modeset.
1976 : : *
1977 : : * Note: Drivers cannot rely on userspace to support this property and
1978 : : * issue a modeset. As such, they may choose to handle issues (like
1979 : : * re-training a link) without userspace's intervention.
1980 : : *
1981 : : * The reason for adding this property is to handle link training failures, but
1982 : : * it is not limited to DP or link training. For example, if we implement
1983 : : * asynchronous setcrtc, this property can be used to report any failures in that.
1984 : : */
1985 : 0 : void drm_connector_set_link_status_property(struct drm_connector *connector,
1986 : : uint64_t link_status)
1987 : : {
1988 : 0 : struct drm_device *dev = connector->dev;
1989 : :
1990 : 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1991 : 0 : connector->state->link_status = link_status;
1992 : 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
1993 : 0 : }
1994 : : EXPORT_SYMBOL(drm_connector_set_link_status_property);
1995 : :
1996 : : /**
1997 : : * drm_connector_attach_max_bpc_property - attach "max bpc" property
1998 : : * @connector: connector to attach max bpc property on.
1999 : : * @min: The minimum bit depth supported by the connector.
2000 : : * @max: The maximum bit depth supported by the connector.
2001 : : *
2002 : : * This is used to add support for limiting the bit depth on a connector.
2003 : : *
2004 : : * Returns:
2005 : : * Zero on success, negative errno on failure.
2006 : : */
2007 : 0 : int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
2008 : : int min, int max)
2009 : : {
2010 : 0 : struct drm_device *dev = connector->dev;
2011 : 0 : struct drm_property *prop;
2012 : :
2013 : 0 : prop = connector->max_bpc_property;
2014 [ # # ]: 0 : if (!prop) {
2015 : 0 : prop = drm_property_create_range(dev, 0, "max bpc", min, max);
2016 [ # # ]: 0 : if (!prop)
2017 : : return -ENOMEM;
2018 : :
2019 : 0 : connector->max_bpc_property = prop;
2020 : : }
2021 : :
2022 : 0 : drm_object_attach_property(&connector->base, prop, max);
2023 : 0 : connector->state->max_requested_bpc = max;
2024 : 0 : connector->state->max_bpc = max;
2025 : :
2026 : 0 : return 0;
2027 : : }
2028 : : EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
2029 : :
2030 : : /**
2031 : : * drm_connector_set_vrr_capable_property - sets the variable refresh rate
2032 : : * capable property for a connector
2033 : : * @connector: drm connector
2034 : : * @capable: True if the connector is variable refresh rate capable
2035 : : *
2036 : : * Should be used by atomic drivers to update the indicated support for
2037 : : * variable refresh rate over a connector.
2038 : : */
2039 : 0 : void drm_connector_set_vrr_capable_property(
2040 : : struct drm_connector *connector, bool capable)
2041 : : {
2042 : 0 : drm_object_property_set_value(&connector->base,
2043 : : connector->vrr_capable_property,
2044 : : capable);
2045 : 0 : }
2046 : : EXPORT_SYMBOL(drm_connector_set_vrr_capable_property);
2047 : :
2048 : : /**
2049 : : * drm_connector_init_panel_orientation_property -
2050 : : * initialize the connecters panel_orientation property
2051 : : * @connector: connector for which to init the panel-orientation property.
2052 : : * @width: width in pixels of the panel, used for panel quirk detection
2053 : : * @height: height in pixels of the panel, used for panel quirk detection
2054 : : *
2055 : : * This function should only be called for built-in panels, after setting
2056 : : * connector->display_info.panel_orientation first (if known).
2057 : : *
2058 : : * This function will check for platform specific (e.g. DMI based) quirks
2059 : : * overriding display_info.panel_orientation first, then if panel_orientation
2060 : : * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the
2061 : : * "panel orientation" property to the connector.
2062 : : *
2063 : : * Returns:
2064 : : * Zero on success, negative errno on failure.
2065 : : */
2066 : 0 : int drm_connector_init_panel_orientation_property(
2067 : : struct drm_connector *connector, int width, int height)
2068 : : {
2069 : 0 : struct drm_device *dev = connector->dev;
2070 : 0 : struct drm_display_info *info = &connector->display_info;
2071 : 0 : struct drm_property *prop;
2072 : 0 : int orientation_quirk;
2073 : :
2074 : 0 : orientation_quirk = drm_get_panel_orientation_quirk(width, height);
2075 [ # # ]: 0 : if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2076 : 0 : info->panel_orientation = orientation_quirk;
2077 : :
2078 [ # # ]: 0 : if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2079 : : return 0;
2080 : :
2081 : 0 : prop = dev->mode_config.panel_orientation_property;
2082 [ # # ]: 0 : if (!prop) {
2083 : 0 : prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
2084 : : "panel orientation",
2085 : : drm_panel_orientation_enum_list,
2086 : : ARRAY_SIZE(drm_panel_orientation_enum_list));
2087 [ # # ]: 0 : if (!prop)
2088 : : return -ENOMEM;
2089 : :
2090 : 0 : dev->mode_config.panel_orientation_property = prop;
2091 : : }
2092 : :
2093 : 0 : drm_object_attach_property(&connector->base, prop,
2094 : 0 : info->panel_orientation);
2095 : 0 : return 0;
2096 : : }
2097 : : EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
2098 : :
2099 : 0 : int drm_connector_set_obj_prop(struct drm_mode_object *obj,
2100 : : struct drm_property *property,
2101 : : uint64_t value)
2102 : : {
2103 : 0 : int ret = -EINVAL;
2104 : 0 : struct drm_connector *connector = obj_to_connector(obj);
2105 : :
2106 : : /* Do DPMS ourselves */
2107 [ # # ]: 0 : if (property == connector->dev->mode_config.dpms_property) {
2108 : 0 : ret = (*connector->funcs->dpms)(connector, (int)value);
2109 [ # # ]: 0 : } else if (connector->funcs->set_property)
2110 : 0 : ret = connector->funcs->set_property(connector, property, value);
2111 : :
2112 [ # # ]: 0 : if (!ret)
2113 : 0 : drm_object_property_set_value(&connector->base, property, value);
2114 : 0 : return ret;
2115 : : }
2116 : :
2117 : 0 : int drm_connector_property_set_ioctl(struct drm_device *dev,
2118 : : void *data, struct drm_file *file_priv)
2119 : : {
2120 : 0 : struct drm_mode_connector_set_property *conn_set_prop = data;
2121 : 0 : struct drm_mode_obj_set_property obj_set_prop = {
2122 : 0 : .value = conn_set_prop->value,
2123 : 0 : .prop_id = conn_set_prop->prop_id,
2124 : 0 : .obj_id = conn_set_prop->connector_id,
2125 : : .obj_type = DRM_MODE_OBJECT_CONNECTOR
2126 : : };
2127 : :
2128 : : /* It does all the locking and checking we need */
2129 : 0 : return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
2130 : : }
2131 : :
2132 : 0 : static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
2133 : : {
2134 : : /* For atomic drivers only state objects are synchronously updated and
2135 : : * protected by modeset locks, so check those first. */
2136 : 0 : if (connector->state)
2137 : 0 : return connector->state->best_encoder;
2138 : : return connector->encoder;
2139 : : }
2140 : :
2141 : : static bool
2142 : : drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
2143 : : const struct list_head *export_list,
2144 : : const struct drm_file *file_priv)
2145 : : {
2146 : : /*
2147 : : * If user-space hasn't configured the driver to expose the stereo 3D
2148 : : * modes, don't expose them.
2149 : : */
2150 : : if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
2151 : : return false;
2152 : : /*
2153 : : * If user-space hasn't configured the driver to expose the modes
2154 : : * with aspect-ratio, don't expose them. However if such a mode
2155 : : * is unique, let it be exposed, but reset the aspect-ratio flags
2156 : : * while preparing the list of user-modes.
2157 : : */
2158 : : if (!file_priv->aspect_ratio_allowed) {
2159 : : struct drm_display_mode *mode_itr;
2160 : :
2161 : : list_for_each_entry(mode_itr, export_list, export_head)
2162 : : if (drm_mode_match(mode_itr, mode,
2163 : : DRM_MODE_MATCH_TIMINGS |
2164 : : DRM_MODE_MATCH_CLOCK |
2165 : : DRM_MODE_MATCH_FLAGS |
2166 : : DRM_MODE_MATCH_3D_FLAGS))
2167 : : return false;
2168 : : }
2169 : :
2170 : : return true;
2171 : : }
2172 : :
2173 : 0 : int drm_mode_getconnector(struct drm_device *dev, void *data,
2174 : : struct drm_file *file_priv)
2175 : : {
2176 : 0 : struct drm_mode_get_connector *out_resp = data;
2177 : 0 : struct drm_connector *connector;
2178 : 0 : struct drm_encoder *encoder;
2179 : 0 : struct drm_display_mode *mode;
2180 : 0 : int mode_count = 0;
2181 : 0 : int encoders_count = 0;
2182 : 0 : int ret = 0;
2183 : 0 : int copied = 0;
2184 : 0 : struct drm_mode_modeinfo u_mode;
2185 : 0 : struct drm_mode_modeinfo __user *mode_ptr;
2186 : 0 : uint32_t __user *encoder_ptr;
2187 : 0 : LIST_HEAD(export_list);
2188 : :
2189 [ # # ]: 0 : if (!drm_core_check_feature(dev, DRIVER_MODESET))
2190 : : return -EOPNOTSUPP;
2191 : :
2192 : 0 : memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2193 : :
2194 : 0 : connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
2195 [ # # ]: 0 : if (!connector)
2196 : : return -ENOENT;
2197 : :
2198 [ # # ]: 0 : encoders_count = hweight32(connector->possible_encoders);
2199 : :
2200 [ # # # # ]: 0 : if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2201 : 0 : copied = 0;
2202 : 0 : encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2203 : :
2204 [ # # # # ]: 0 : drm_connector_for_each_possible_encoder(connector, encoder) {
2205 [ # # ]: 0 : if (put_user(encoder->base.id, encoder_ptr + copied)) {
2206 : 0 : ret = -EFAULT;
2207 : 0 : goto out;
2208 : : }
2209 : 0 : copied++;
2210 : : }
2211 : : }
2212 : 0 : out_resp->count_encoders = encoders_count;
2213 : :
2214 : 0 : out_resp->connector_id = connector->base.id;
2215 : 0 : out_resp->connector_type = connector->connector_type;
2216 : 0 : out_resp->connector_type_id = connector->connector_type_id;
2217 : :
2218 : 0 : mutex_lock(&dev->mode_config.mutex);
2219 [ # # ]: 0 : if (out_resp->count_modes == 0) {
2220 : 0 : connector->funcs->fill_modes(connector,
2221 : 0 : dev->mode_config.max_width,
2222 : 0 : dev->mode_config.max_height);
2223 : : }
2224 : :
2225 : 0 : out_resp->mm_width = connector->display_info.width_mm;
2226 : 0 : out_resp->mm_height = connector->display_info.height_mm;
2227 : 0 : out_resp->subpixel = connector->display_info.subpixel_order;
2228 : 0 : out_resp->connection = connector->status;
2229 : :
2230 : : /* delayed so we get modes regardless of pre-fill_modes state */
2231 [ # # ]: 0 : list_for_each_entry(mode, &connector->modes, head)
2232 [ # # ]: 0 : if (drm_mode_expose_to_userspace(mode, &export_list,
2233 : : file_priv)) {
2234 : 0 : list_add_tail(&mode->export_head, &export_list);
2235 : 0 : mode_count++;
2236 : : }
2237 : :
2238 : : /*
2239 : : * This ioctl is called twice, once to determine how much space is
2240 : : * needed, and the 2nd time to fill it.
2241 : : * The modes that need to be exposed to the user are maintained in the
2242 : : * 'export_list'. When the ioctl is called first time to determine the,
2243 : : * space, the export_list gets filled, to find the no.of modes. In the
2244 : : * 2nd time, the user modes are filled, one by one from the export_list.
2245 : : */
2246 [ # # # # ]: 0 : if ((out_resp->count_modes >= mode_count) && mode_count) {
2247 : 0 : copied = 0;
2248 : 0 : mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2249 [ # # ]: 0 : list_for_each_entry(mode, &export_list, export_head) {
2250 : 0 : drm_mode_convert_to_umode(&u_mode, mode);
2251 : : /*
2252 : : * Reset aspect ratio flags of user-mode, if modes with
2253 : : * aspect-ratio are not supported.
2254 : : */
2255 [ # # ]: 0 : if (!file_priv->aspect_ratio_allowed)
2256 : 0 : u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
2257 [ # # ]: 0 : if (copy_to_user(mode_ptr + copied,
2258 : : &u_mode, sizeof(u_mode))) {
2259 : 0 : ret = -EFAULT;
2260 : 0 : mutex_unlock(&dev->mode_config.mutex);
2261 : :
2262 : 0 : goto out;
2263 : : }
2264 : 0 : copied++;
2265 : : }
2266 : : }
2267 : 0 : out_resp->count_modes = mode_count;
2268 : 0 : mutex_unlock(&dev->mode_config.mutex);
2269 : :
2270 : 0 : drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2271 [ # # ]: 0 : encoder = drm_connector_get_encoder(connector);
2272 [ # # ]: 0 : if (encoder)
2273 : 0 : out_resp->encoder_id = encoder->base.id;
2274 : : else
2275 : 0 : out_resp->encoder_id = 0;
2276 : :
2277 : : /* Only grab properties after probing, to make sure EDID and other
2278 : : * properties reflect the latest status. */
2279 : 0 : ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
2280 : 0 : (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2281 : 0 : (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2282 : 0 : &out_resp->count_props);
2283 : 0 : drm_modeset_unlock(&dev->mode_config.connection_mutex);
2284 : :
2285 : 0 : out:
2286 : 0 : drm_connector_put(connector);
2287 : :
2288 : 0 : return ret;
2289 : : }
2290 : :
2291 : :
2292 : : /**
2293 : : * DOC: Tile group
2294 : : *
2295 : : * Tile groups are used to represent tiled monitors with a unique integer
2296 : : * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
2297 : : * we store this in a tile group, so we have a common identifier for all tiles
2298 : : * in a monitor group. The property is called "TILE". Drivers can manage tile
2299 : : * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
2300 : : * drm_mode_get_tile_group(). But this is only needed for internal panels where
2301 : : * the tile group information is exposed through a non-standard way.
2302 : : */
2303 : :
2304 : 0 : static void drm_tile_group_free(struct kref *kref)
2305 : : {
2306 : 0 : struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
2307 : 0 : struct drm_device *dev = tg->dev;
2308 : 0 : mutex_lock(&dev->mode_config.idr_mutex);
2309 : 0 : idr_remove(&dev->mode_config.tile_idr, tg->id);
2310 : 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2311 : 0 : kfree(tg);
2312 : 0 : }
2313 : :
2314 : : /**
2315 : : * drm_mode_put_tile_group - drop a reference to a tile group.
2316 : : * @dev: DRM device
2317 : : * @tg: tile group to drop reference to.
2318 : : *
2319 : : * drop reference to tile group and free if 0.
2320 : : */
2321 : 0 : void drm_mode_put_tile_group(struct drm_device *dev,
2322 : : struct drm_tile_group *tg)
2323 : : {
2324 : 0 : kref_put(&tg->refcount, drm_tile_group_free);
2325 : 0 : }
2326 : : EXPORT_SYMBOL(drm_mode_put_tile_group);
2327 : :
2328 : : /**
2329 : : * drm_mode_get_tile_group - get a reference to an existing tile group
2330 : : * @dev: DRM device
2331 : : * @topology: 8-bytes unique per monitor.
2332 : : *
2333 : : * Use the unique bytes to get a reference to an existing tile group.
2334 : : *
2335 : : * RETURNS:
2336 : : * tile group or NULL if not found.
2337 : : */
2338 : 0 : struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
2339 : : char topology[8])
2340 : : {
2341 : 0 : struct drm_tile_group *tg;
2342 : 0 : int id;
2343 : 0 : mutex_lock(&dev->mode_config.idr_mutex);
2344 [ # # ]: 0 : idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
2345 [ # # ]: 0 : if (!memcmp(tg->group_data, topology, 8)) {
2346 [ # # ]: 0 : if (!kref_get_unless_zero(&tg->refcount))
2347 : 0 : tg = NULL;
2348 : 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2349 : 0 : return tg;
2350 : : }
2351 : : }
2352 : 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2353 : 0 : return NULL;
2354 : : }
2355 : : EXPORT_SYMBOL(drm_mode_get_tile_group);
2356 : :
2357 : : /**
2358 : : * drm_mode_create_tile_group - create a tile group from a displayid description
2359 : : * @dev: DRM device
2360 : : * @topology: 8-bytes unique per monitor.
2361 : : *
2362 : : * Create a tile group for the unique monitor, and get a unique
2363 : : * identifier for the tile group.
2364 : : *
2365 : : * RETURNS:
2366 : : * new tile group or NULL.
2367 : : */
2368 : 0 : struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
2369 : : char topology[8])
2370 : : {
2371 : 0 : struct drm_tile_group *tg;
2372 : 0 : int ret;
2373 : :
2374 : 0 : tg = kzalloc(sizeof(*tg), GFP_KERNEL);
2375 [ # # ]: 0 : if (!tg)
2376 : : return NULL;
2377 : :
2378 : 0 : kref_init(&tg->refcount);
2379 : 0 : memcpy(tg->group_data, topology, 8);
2380 : 0 : tg->dev = dev;
2381 : :
2382 : 0 : mutex_lock(&dev->mode_config.idr_mutex);
2383 : 0 : ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
2384 [ # # ]: 0 : if (ret >= 0) {
2385 : 0 : tg->id = ret;
2386 : : } else {
2387 : 0 : kfree(tg);
2388 : 0 : tg = NULL;
2389 : : }
2390 : :
2391 : 0 : mutex_unlock(&dev->mode_config.idr_mutex);
2392 : 0 : return tg;
2393 : : }
2394 : : EXPORT_SYMBOL(drm_mode_create_tile_group);
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