2 * Copyright (c) 2016 Intel Corporation
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.
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
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>
31 #include <linux/uaccess.h>
33 #include "drm_crtc_internal.h"
34 #include "drm_internal.h"
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().
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().
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
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().
66 struct drm_conn_prop_enum_list {
73 * Connector and encoder types.
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" },
97 void drm_connector_ida_init(void)
101 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
102 ida_init(&drm_connector_enum_list[i].ida);
105 void drm_connector_ida_destroy(void)
109 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
110 ida_destroy(&drm_connector_enum_list[i].ida);
114 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
115 * @connector: connector to quwery
117 * The kernel supports per-connector configuration of its consoles through
118 * use of the video= parameter. This function parses that option and
119 * extracts the user's specified mode (or enable/disable status) for a
120 * particular connector. This is typically only used during the early fbdev
123 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
125 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
128 if (fb_get_options(connector->name, &option))
131 if (!drm_mode_parse_command_line_for_connector(option,
137 DRM_INFO("forcing %s connector %s\n", connector->name,
138 drm_get_connector_force_name(mode->force));
139 connector->force = mode->force;
142 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
144 mode->xres, mode->yres,
145 mode->refresh_specified ? mode->refresh : 60,
146 mode->rb ? " reduced blanking" : "",
147 mode->margins ? " with margins" : "",
148 mode->interlace ? " interlaced" : "");
151 static void drm_connector_free(struct kref *kref)
153 struct drm_connector *connector =
154 container_of(kref, struct drm_connector, base.refcount);
155 struct drm_device *dev = connector->dev;
157 drm_mode_object_unregister(dev, &connector->base);
158 connector->funcs->destroy(connector);
161 void drm_connector_free_work_fn(struct work_struct *work)
163 struct drm_connector *connector, *n;
164 struct drm_device *dev =
165 container_of(work, struct drm_device, mode_config.connector_free_work);
166 struct drm_mode_config *config = &dev->mode_config;
168 struct llist_node *freed;
170 spin_lock_irqsave(&config->connector_list_lock, flags);
171 freed = llist_del_all(&config->connector_free_list);
172 spin_unlock_irqrestore(&config->connector_list_lock, flags);
174 llist_for_each_entry_safe(connector, n, freed, free_node) {
175 drm_mode_object_unregister(dev, &connector->base);
176 connector->funcs->destroy(connector);
181 * drm_connector_init - Init a preallocated connector
183 * @connector: the connector to init
184 * @funcs: callbacks for this connector
185 * @connector_type: user visible type of the connector
187 * Initialises a preallocated connector. Connectors should be
188 * subclassed as part of driver connector objects.
191 * Zero on success, error code on failure.
193 int drm_connector_init(struct drm_device *dev,
194 struct drm_connector *connector,
195 const struct drm_connector_funcs *funcs,
198 struct drm_mode_config *config = &dev->mode_config;
200 struct ida *connector_ida =
201 &drm_connector_enum_list[connector_type].ida;
203 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
204 (!funcs->atomic_destroy_state ||
205 !funcs->atomic_duplicate_state));
207 ret = __drm_mode_object_add(dev, &connector->base,
208 DRM_MODE_OBJECT_CONNECTOR,
209 false, drm_connector_free);
213 connector->base.properties = &connector->properties;
214 connector->dev = dev;
215 connector->funcs = funcs;
217 /* connector index is used with 32bit bitmasks */
218 ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
220 DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
221 drm_connector_enum_list[connector_type].name,
225 connector->index = ret;
228 connector->connector_type = connector_type;
229 connector->connector_type_id =
230 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
231 if (connector->connector_type_id < 0) {
232 ret = connector->connector_type_id;
236 kasprintf(GFP_KERNEL, "%s-%d",
237 drm_connector_enum_list[connector_type].name,
238 connector->connector_type_id);
239 if (!connector->name) {
241 goto out_put_type_id;
244 INIT_LIST_HEAD(&connector->probed_modes);
245 INIT_LIST_HEAD(&connector->modes);
246 mutex_init(&connector->mutex);
247 connector->edid_blob_ptr = NULL;
248 connector->tile_blob_ptr = NULL;
249 connector->status = connector_status_unknown;
250 connector->display_info.panel_orientation =
251 DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
253 drm_connector_get_cmdline_mode(connector);
255 /* We should add connectors at the end to avoid upsetting the connector
257 spin_lock_irq(&config->connector_list_lock);
258 list_add_tail(&connector->head, &config->connector_list);
259 config->num_connector++;
260 spin_unlock_irq(&config->connector_list_lock);
262 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL &&
263 connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
264 drm_connector_attach_edid_property(connector);
266 drm_object_attach_property(&connector->base,
267 config->dpms_property, 0);
269 drm_object_attach_property(&connector->base,
270 config->link_status_property,
273 drm_object_attach_property(&connector->base,
274 config->non_desktop_property,
276 drm_object_attach_property(&connector->base,
277 config->tile_property,
280 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
281 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
284 connector->debugfs_entry = NULL;
287 ida_simple_remove(connector_ida, connector->connector_type_id);
290 ida_simple_remove(&config->connector_ida, connector->index);
293 drm_mode_object_unregister(dev, &connector->base);
297 EXPORT_SYMBOL(drm_connector_init);
300 * drm_connector_attach_edid_property - attach edid property.
301 * @connector: the connector
303 * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a
304 * edid property attached by default. This function can be used to
305 * explicitly enable the edid property in these cases.
307 void drm_connector_attach_edid_property(struct drm_connector *connector)
309 struct drm_mode_config *config = &connector->dev->mode_config;
311 drm_object_attach_property(&connector->base,
312 config->edid_property,
315 EXPORT_SYMBOL(drm_connector_attach_edid_property);
318 * drm_connector_attach_encoder - attach a connector to an encoder
319 * @connector: connector to attach
320 * @encoder: encoder to attach @connector to
322 * This function links up a connector to an encoder. Note that the routing
323 * restrictions between encoders and crtcs are exposed to userspace through the
324 * possible_clones and possible_crtcs bitmasks.
327 * Zero on success, negative errno on failure.
329 int drm_connector_attach_encoder(struct drm_connector *connector,
330 struct drm_encoder *encoder)
335 * In the past, drivers have attempted to model the static association
336 * of connector to encoder in simple connector/encoder devices using a
337 * direct assignment of connector->encoder = encoder. This connection
338 * is a logical one and the responsibility of the core, so drivers are
339 * expected not to mess with this.
341 * Note that the error return should've been enough here, but a large
342 * majority of drivers ignores the return value, so add in a big WARN
343 * to get people's attention.
345 if (WARN_ON(connector->encoder))
348 for (i = 0; i < ARRAY_SIZE(connector->encoder_ids); i++) {
349 if (connector->encoder_ids[i] == 0) {
350 connector->encoder_ids[i] = encoder->base.id;
356 EXPORT_SYMBOL(drm_connector_attach_encoder);
359 * drm_connector_has_possible_encoder - check if the connector and encoder are assosicated with each other
360 * @connector: the connector
361 * @encoder: the encoder
364 * True if @encoder is one of the possible encoders for @connector.
366 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
367 struct drm_encoder *encoder)
369 struct drm_encoder *enc;
372 drm_connector_for_each_possible_encoder(connector, enc, i) {
379 EXPORT_SYMBOL(drm_connector_has_possible_encoder);
381 static void drm_mode_remove(struct drm_connector *connector,
382 struct drm_display_mode *mode)
384 list_del(&mode->head);
385 drm_mode_destroy(connector->dev, mode);
389 * drm_connector_cleanup - cleans up an initialised connector
390 * @connector: connector to cleanup
392 * Cleans up the connector but doesn't free the object.
394 void drm_connector_cleanup(struct drm_connector *connector)
396 struct drm_device *dev = connector->dev;
397 struct drm_display_mode *mode, *t;
399 /* The connector should have been removed from userspace long before
400 * it is finally destroyed.
402 if (WARN_ON(connector->registration_state ==
403 DRM_CONNECTOR_REGISTERED))
404 drm_connector_unregister(connector);
406 if (connector->tile_group) {
407 drm_mode_put_tile_group(dev, connector->tile_group);
408 connector->tile_group = NULL;
411 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
412 drm_mode_remove(connector, mode);
414 list_for_each_entry_safe(mode, t, &connector->modes, head)
415 drm_mode_remove(connector, mode);
417 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
418 connector->connector_type_id);
420 ida_simple_remove(&dev->mode_config.connector_ida,
423 kfree(connector->display_info.bus_formats);
424 drm_mode_object_unregister(dev, &connector->base);
425 kfree(connector->name);
426 connector->name = NULL;
427 spin_lock_irq(&dev->mode_config.connector_list_lock);
428 list_del(&connector->head);
429 dev->mode_config.num_connector--;
430 spin_unlock_irq(&dev->mode_config.connector_list_lock);
432 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
433 if (connector->state && connector->funcs->atomic_destroy_state)
434 connector->funcs->atomic_destroy_state(connector,
437 mutex_destroy(&connector->mutex);
439 memset(connector, 0, sizeof(*connector));
441 EXPORT_SYMBOL(drm_connector_cleanup);
444 * drm_connector_register - register a connector
445 * @connector: the connector to register
447 * Register userspace interfaces for a connector
450 * Zero on success, error code on failure.
452 int drm_connector_register(struct drm_connector *connector)
456 if (!connector->dev->registered)
459 mutex_lock(&connector->mutex);
460 if (connector->registration_state != DRM_CONNECTOR_INITIALIZING)
463 ret = drm_sysfs_connector_add(connector);
467 ret = drm_debugfs_connector_add(connector);
472 if (connector->funcs->late_register) {
473 ret = connector->funcs->late_register(connector);
478 drm_mode_object_register(connector->dev, &connector->base);
480 connector->registration_state = DRM_CONNECTOR_REGISTERED;
484 drm_debugfs_connector_remove(connector);
486 drm_sysfs_connector_remove(connector);
488 mutex_unlock(&connector->mutex);
491 EXPORT_SYMBOL(drm_connector_register);
494 * drm_connector_unregister - unregister a connector
495 * @connector: the connector to unregister
497 * Unregister userspace interfaces for a connector
499 void drm_connector_unregister(struct drm_connector *connector)
501 mutex_lock(&connector->mutex);
502 if (connector->registration_state != DRM_CONNECTOR_REGISTERED) {
503 mutex_unlock(&connector->mutex);
507 if (connector->funcs->early_unregister)
508 connector->funcs->early_unregister(connector);
510 drm_sysfs_connector_remove(connector);
511 drm_debugfs_connector_remove(connector);
513 connector->registration_state = DRM_CONNECTOR_UNREGISTERED;
514 mutex_unlock(&connector->mutex);
516 EXPORT_SYMBOL(drm_connector_unregister);
518 void drm_connector_unregister_all(struct drm_device *dev)
520 struct drm_connector *connector;
521 struct drm_connector_list_iter conn_iter;
523 drm_connector_list_iter_begin(dev, &conn_iter);
524 drm_for_each_connector_iter(connector, &conn_iter)
525 drm_connector_unregister(connector);
526 drm_connector_list_iter_end(&conn_iter);
529 int drm_connector_register_all(struct drm_device *dev)
531 struct drm_connector *connector;
532 struct drm_connector_list_iter conn_iter;
535 drm_connector_list_iter_begin(dev, &conn_iter);
536 drm_for_each_connector_iter(connector, &conn_iter) {
537 ret = drm_connector_register(connector);
541 drm_connector_list_iter_end(&conn_iter);
544 drm_connector_unregister_all(dev);
549 * drm_get_connector_status_name - return a string for connector status
550 * @status: connector status to compute name of
552 * In contrast to the other drm_get_*_name functions this one here returns a
553 * const pointer and hence is threadsafe.
555 const char *drm_get_connector_status_name(enum drm_connector_status status)
557 if (status == connector_status_connected)
559 else if (status == connector_status_disconnected)
560 return "disconnected";
564 EXPORT_SYMBOL(drm_get_connector_status_name);
567 * drm_get_connector_force_name - return a string for connector force
568 * @force: connector force to get name of
570 * Returns: const pointer to name.
572 const char *drm_get_connector_force_name(enum drm_connector_force force)
575 case DRM_FORCE_UNSPECIFIED:
576 return "unspecified";
581 case DRM_FORCE_ON_DIGITAL:
588 #ifdef CONFIG_LOCKDEP
589 static struct lockdep_map connector_list_iter_dep_map = {
590 .name = "drm_connector_list_iter"
595 * drm_connector_list_iter_begin - initialize a connector_list iterator
597 * @iter: connector_list iterator
599 * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
600 * must always be cleaned up again by calling drm_connector_list_iter_end().
601 * Iteration itself happens using drm_connector_list_iter_next() or
602 * drm_for_each_connector_iter().
604 void drm_connector_list_iter_begin(struct drm_device *dev,
605 struct drm_connector_list_iter *iter)
609 lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
611 EXPORT_SYMBOL(drm_connector_list_iter_begin);
614 * Extra-safe connector put function that works in any context. Should only be
615 * used from the connector_iter functions, where we never really expect to
616 * actually release the connector when dropping our final reference.
619 __drm_connector_put_safe(struct drm_connector *conn)
621 struct drm_mode_config *config = &conn->dev->mode_config;
623 lockdep_assert_held(&config->connector_list_lock);
625 if (!refcount_dec_and_test(&conn->base.refcount.refcount))
628 llist_add(&conn->free_node, &config->connector_free_list);
629 schedule_work(&config->connector_free_work);
633 * drm_connector_list_iter_next - return next connector
634 * @iter: connector_list iterator
636 * Returns the next connector for @iter, or NULL when the list walk has
639 struct drm_connector *
640 drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
642 struct drm_connector *old_conn = iter->conn;
643 struct drm_mode_config *config = &iter->dev->mode_config;
644 struct list_head *lhead;
647 spin_lock_irqsave(&config->connector_list_lock, flags);
648 lhead = old_conn ? &old_conn->head : &config->connector_list;
651 if (lhead->next == &config->connector_list) {
657 iter->conn = list_entry(lhead, struct drm_connector, head);
659 /* loop until it's not a zombie connector */
660 } while (!kref_get_unless_zero(&iter->conn->base.refcount));
663 __drm_connector_put_safe(old_conn);
664 spin_unlock_irqrestore(&config->connector_list_lock, flags);
668 EXPORT_SYMBOL(drm_connector_list_iter_next);
671 * drm_connector_list_iter_end - tear down a connector_list iterator
672 * @iter: connector_list iterator
674 * Tears down @iter and releases any resources (like &drm_connector references)
675 * acquired while walking the list. This must always be called, both when the
676 * iteration completes fully or when it was aborted without walking the entire
679 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
681 struct drm_mode_config *config = &iter->dev->mode_config;
686 spin_lock_irqsave(&config->connector_list_lock, flags);
687 __drm_connector_put_safe(iter->conn);
688 spin_unlock_irqrestore(&config->connector_list_lock, flags);
690 lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
692 EXPORT_SYMBOL(drm_connector_list_iter_end);
694 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
695 { SubPixelUnknown, "Unknown" },
696 { SubPixelHorizontalRGB, "Horizontal RGB" },
697 { SubPixelHorizontalBGR, "Horizontal BGR" },
698 { SubPixelVerticalRGB, "Vertical RGB" },
699 { SubPixelVerticalBGR, "Vertical BGR" },
700 { SubPixelNone, "None" },
704 * drm_get_subpixel_order_name - return a string for a given subpixel enum
705 * @order: enum of subpixel_order
707 * Note you could abuse this and return something out of bounds, but that
708 * would be a caller error. No unscrubbed user data should make it here.
710 const char *drm_get_subpixel_order_name(enum subpixel_order order)
712 return drm_subpixel_enum_list[order].name;
714 EXPORT_SYMBOL(drm_get_subpixel_order_name);
716 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
717 { DRM_MODE_DPMS_ON, "On" },
718 { DRM_MODE_DPMS_STANDBY, "Standby" },
719 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
720 { DRM_MODE_DPMS_OFF, "Off" }
722 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
724 static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
725 { DRM_MODE_LINK_STATUS_GOOD, "Good" },
726 { DRM_MODE_LINK_STATUS_BAD, "Bad" },
730 * drm_display_info_set_bus_formats - set the supported bus formats
731 * @info: display info to store bus formats in
732 * @formats: array containing the supported bus formats
733 * @num_formats: the number of entries in the fmts array
735 * Store the supported bus formats in display info structure.
736 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
737 * a full list of available formats.
739 int drm_display_info_set_bus_formats(struct drm_display_info *info,
741 unsigned int num_formats)
745 if (!formats && num_formats)
748 if (formats && num_formats) {
749 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
755 kfree(info->bus_formats);
756 info->bus_formats = fmts;
757 info->num_bus_formats = num_formats;
761 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
763 /* Optional connector properties. */
764 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
765 { DRM_MODE_SCALE_NONE, "None" },
766 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
767 { DRM_MODE_SCALE_CENTER, "Center" },
768 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
771 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
772 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
773 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
774 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
777 static const struct drm_prop_enum_list drm_content_type_enum_list[] = {
778 { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" },
779 { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" },
780 { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" },
781 { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" },
782 { DRM_MODE_CONTENT_TYPE_GAME, "Game" },
785 static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
786 { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
787 { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
788 { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
789 { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
792 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
793 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
794 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
795 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
797 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
799 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
800 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
801 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
802 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
804 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
805 drm_dvi_i_subconnector_enum_list)
807 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
808 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
809 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
810 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
811 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
812 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
814 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
816 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
817 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
818 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
819 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
820 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
821 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
823 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
824 drm_tv_subconnector_enum_list)
826 static struct drm_prop_enum_list drm_cp_enum_list[] = {
827 { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" },
828 { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" },
829 { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" },
831 DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
833 static const struct drm_prop_enum_list hdmi_colorspaces[] = {
834 /* For Default case, driver will set the colorspace */
835 { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
836 /* Standard Definition Colorimetry based on CEA 861 */
837 { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" },
838 { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
839 /* Standard Definition Colorimetry based on IEC 61966-2-4 */
840 { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
841 /* High Definition Colorimetry based on IEC 61966-2-4 */
842 { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
843 /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
844 { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
845 /* Colorimetry based on IEC 61966-2-5 [33] */
846 { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
847 /* Colorimetry based on IEC 61966-2-5 */
848 { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
849 /* Colorimetry based on ITU-R BT.2020 */
850 { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
851 /* Colorimetry based on ITU-R BT.2020 */
852 { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
853 /* Colorimetry based on ITU-R BT.2020 */
854 { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
855 /* Added as part of Additional Colorimetry Extension in 861.G */
856 { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
857 { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" },
861 * DOC: standard connector properties
863 * DRM connectors have a few standardized properties:
866 * Blob property which contains the current EDID read from the sink. This
867 * is useful to parse sink identification information like vendor, model
868 * and serial. Drivers should update this property by calling
869 * drm_connector_update_edid_property(), usually after having parsed
870 * the EDID using drm_add_edid_modes(). Userspace cannot change this
873 * Legacy property for setting the power state of the connector. For atomic
874 * drivers this is only provided for backwards compatibility with existing
875 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
876 * connector is linked to. Drivers should never set this property directly,
877 * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
878 * callback. For atomic drivers the remapping to the "ACTIVE" property is
879 * implemented in the DRM core. This is the only standard connector
880 * property that userspace can change.
882 * Note that this property cannot be set through the MODE_ATOMIC ioctl,
883 * userspace must use "ACTIVE" on the CRTC instead.
887 * For userspace also running on legacy drivers the "DPMS" semantics are a
888 * lot more complicated. First, userspace cannot rely on the "DPMS" value
889 * returned by the GETCONNECTOR actually reflecting reality, because many
890 * drivers fail to update it. For atomic drivers this is taken care of in
891 * drm_atomic_helper_update_legacy_modeset_state().
893 * The second issue is that the DPMS state is only well-defined when the
894 * connector is connected to a CRTC. In atomic the DRM core enforces that
895 * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
897 * Finally, when enabling an output using the legacy SETCONFIG ioctl then
898 * "DPMS" is forced to ON. But see above, that might not be reflected in
899 * the software value on legacy drivers.
901 * Summarizing: Only set "DPMS" when the connector is known to be enabled,
902 * assume that a successful SETCONFIG call also sets "DPMS" to on, and
903 * never read back the value of "DPMS" because it can be incorrect.
905 * Connector path property to identify how this sink is physically
906 * connected. Used by DP MST. This should be set by calling
907 * drm_connector_set_path_property(), in the case of DP MST with the
908 * path property the MST manager created. Userspace cannot change this
911 * Connector tile group property to indicate how a set of DRM connector
912 * compose together into one logical screen. This is used by both high-res
913 * external screens (often only using a single cable, but exposing multiple
914 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
915 * are not gen-locked. Note that for tiled panels which are genlocked, like
916 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
917 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
918 * should update this value using drm_connector_set_tile_property().
919 * Userspace cannot change this property.
921 * Connector link-status property to indicate the status of link. The
922 * default value of link-status is "GOOD". If something fails during or
923 * after modeset, the kernel driver may set this to "BAD" and issue a
924 * hotplug uevent. Drivers should update this value using
925 * drm_connector_set_link_status_property().
927 * Indicates the output should be ignored for purposes of displaying a
928 * standard desktop environment or console. This is most likely because
929 * the output device is not rectilinear.
930 * Content Protection:
931 * This property is used by userspace to request the kernel protect future
932 * content communicated over the link. When requested, kernel will apply
933 * the appropriate means of protection (most often HDCP), and use the
934 * property to tell userspace the protection is active.
936 * Drivers can set this up by calling
937 * drm_connector_attach_content_protection_property() on initialization.
939 * The value of this property can be one of the following:
941 * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
942 * The link is not protected, content is transmitted in the clear.
943 * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
944 * Userspace has requested content protection, but the link is not
945 * currently protected. When in this state, kernel should enable
946 * Content Protection as soon as possible.
947 * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
948 * Userspace has requested content protection, and the link is
949 * protected. Only the driver can set the property to this value.
950 * If userspace attempts to set to ENABLED, kernel will return
955 * - DESIRED state should be preserved until userspace de-asserts it by
956 * setting the property to UNDESIRED. This means ENABLED should only
957 * transition to UNDESIRED when the user explicitly requests it.
958 * - If the state is DESIRED, kernel should attempt to re-authenticate the
959 * link whenever possible. This includes across disable/enable, dpms,
960 * hotplug, downstream device changes, link status failures, etc..
961 * - Userspace is responsible for polling the property to determine when
962 * the value transitions from ENABLED to DESIRED. This signifies the link
963 * is no longer protected and userspace should take appropriate action
964 * (whatever that might be).
967 * This range property is used by userspace to limit the bit depth. When
968 * used the driver would limit the bpc in accordance with the valid range
969 * supported by the hardware and sink. Drivers to use the function
970 * drm_connector_attach_max_bpc_property() to create and attach the
971 * property to the connector during initialization.
973 * Connectors also have one standardized atomic property:
976 * Mode object ID of the &drm_crtc this connector should be connected to.
978 * Connectors for LCD panels may also have one standardized property:
981 * On some devices the LCD panel is mounted in the casing in such a way
982 * that the up/top side of the panel does not match with the top side of
983 * the device. Userspace can use this property to check for this.
984 * Note that input coordinates from touchscreens (input devices with
985 * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
986 * coordinates, so if userspace rotates the picture to adjust for
987 * the orientation it must also apply the same transformation to the
988 * touchscreen input coordinates. This property is initialized by calling
989 * drm_connector_init_panel_orientation_property().
992 * This property defines how a non-native mode is upscaled to the native
993 * mode of an LCD panel:
996 * No upscaling happens, scaling is left to the panel. Not all
997 * drivers expose this mode.
999 * The output is upscaled to the full resolution of the panel,
1000 * ignoring the aspect ratio.
1002 * No upscaling happens, the output is centered within the native
1003 * resolution the panel.
1005 * The output is upscaled to maximize either the width or height
1006 * while retaining the aspect ratio.
1008 * This property should be set up by calling
1009 * drm_connector_attach_scaling_mode_property(). Note that drivers
1010 * can also expose this property to external outputs, in which case they
1011 * must support "None", which should be the default (since external screens
1012 * have a built-in scaler).
1015 int drm_connector_create_standard_properties(struct drm_device *dev)
1017 struct drm_property *prop;
1019 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1020 DRM_MODE_PROP_IMMUTABLE,
1024 dev->mode_config.edid_property = prop;
1026 prop = drm_property_create_enum(dev, 0,
1027 "DPMS", drm_dpms_enum_list,
1028 ARRAY_SIZE(drm_dpms_enum_list));
1031 dev->mode_config.dpms_property = prop;
1033 prop = drm_property_create(dev,
1034 DRM_MODE_PROP_BLOB |
1035 DRM_MODE_PROP_IMMUTABLE,
1039 dev->mode_config.path_property = prop;
1041 prop = drm_property_create(dev,
1042 DRM_MODE_PROP_BLOB |
1043 DRM_MODE_PROP_IMMUTABLE,
1047 dev->mode_config.tile_property = prop;
1049 prop = drm_property_create_enum(dev, 0, "link-status",
1050 drm_link_status_enum_list,
1051 ARRAY_SIZE(drm_link_status_enum_list));
1054 dev->mode_config.link_status_property = prop;
1056 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
1059 dev->mode_config.non_desktop_property = prop;
1061 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
1062 "HDR_OUTPUT_METADATA", 0);
1065 dev->mode_config.hdr_output_metadata_property = prop;
1071 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1074 * Called by a driver the first time a DVI-I connector is made.
1076 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1078 struct drm_property *dvi_i_selector;
1079 struct drm_property *dvi_i_subconnector;
1081 if (dev->mode_config.dvi_i_select_subconnector_property)
1085 drm_property_create_enum(dev, 0,
1086 "select subconnector",
1087 drm_dvi_i_select_enum_list,
1088 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1089 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1091 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1093 drm_dvi_i_subconnector_enum_list,
1094 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1095 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1099 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1102 * DOC: HDMI connector properties
1104 * content type (HDMI specific):
1105 * Indicates content type setting to be used in HDMI infoframes to indicate
1106 * content type for the external device, so that it adjusts its display
1107 * settings accordingly.
1109 * The value of this property can be one of the following:
1112 * Content type is unknown
1114 * Content type is graphics
1116 * Content type is photo
1118 * Content type is cinema
1120 * Content type is game
1122 * Drivers can set up this property by calling
1123 * drm_connector_attach_content_type_property(). Decoding to
1124 * infoframe values is done through drm_hdmi_avi_infoframe_content_type().
1128 * drm_connector_attach_content_type_property - attach content-type property
1129 * @connector: connector to attach content type property on.
1131 * Called by a driver the first time a HDMI connector is made.
1133 int drm_connector_attach_content_type_property(struct drm_connector *connector)
1135 if (!drm_mode_create_content_type_property(connector->dev))
1136 drm_object_attach_property(&connector->base,
1137 connector->dev->mode_config.content_type_property,
1138 DRM_MODE_CONTENT_TYPE_NO_DATA);
1141 EXPORT_SYMBOL(drm_connector_attach_content_type_property);
1145 * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe
1146 * content type information, based
1147 * on correspondent DRM property.
1148 * @frame: HDMI AVI infoframe
1149 * @conn_state: DRM display connector state
1152 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1153 const struct drm_connector_state *conn_state)
1155 switch (conn_state->content_type) {
1156 case DRM_MODE_CONTENT_TYPE_GRAPHICS:
1157 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1159 case DRM_MODE_CONTENT_TYPE_CINEMA:
1160 frame->content_type = HDMI_CONTENT_TYPE_CINEMA;
1162 case DRM_MODE_CONTENT_TYPE_GAME:
1163 frame->content_type = HDMI_CONTENT_TYPE_GAME;
1165 case DRM_MODE_CONTENT_TYPE_PHOTO:
1166 frame->content_type = HDMI_CONTENT_TYPE_PHOTO;
1169 /* Graphics is the default(0) */
1170 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1173 frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA;
1175 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type);
1178 * drm_mode_attach_tv_margin_properties - attach TV connector margin properties
1179 * @connector: DRM connector
1181 * Called by a driver when it needs to attach TV margin props to a connector.
1182 * Typically used on SDTV and HDMI connectors.
1184 void drm_connector_attach_tv_margin_properties(struct drm_connector *connector)
1186 struct drm_device *dev = connector->dev;
1188 drm_object_attach_property(&connector->base,
1189 dev->mode_config.tv_left_margin_property,
1191 drm_object_attach_property(&connector->base,
1192 dev->mode_config.tv_right_margin_property,
1194 drm_object_attach_property(&connector->base,
1195 dev->mode_config.tv_top_margin_property,
1197 drm_object_attach_property(&connector->base,
1198 dev->mode_config.tv_bottom_margin_property,
1201 EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties);
1204 * drm_mode_create_tv_margin_properties - create TV connector margin properties
1207 * Called by a driver's HDMI connector initialization routine, this function
1208 * creates the TV margin properties for a given device. No need to call this
1209 * function for an SDTV connector, it's already called from
1210 * drm_mode_create_tv_properties().
1212 int drm_mode_create_tv_margin_properties(struct drm_device *dev)
1214 if (dev->mode_config.tv_left_margin_property)
1217 dev->mode_config.tv_left_margin_property =
1218 drm_property_create_range(dev, 0, "left margin", 0, 100);
1219 if (!dev->mode_config.tv_left_margin_property)
1222 dev->mode_config.tv_right_margin_property =
1223 drm_property_create_range(dev, 0, "right margin", 0, 100);
1224 if (!dev->mode_config.tv_right_margin_property)
1227 dev->mode_config.tv_top_margin_property =
1228 drm_property_create_range(dev, 0, "top margin", 0, 100);
1229 if (!dev->mode_config.tv_top_margin_property)
1232 dev->mode_config.tv_bottom_margin_property =
1233 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1234 if (!dev->mode_config.tv_bottom_margin_property)
1239 EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
1242 * drm_mode_create_tv_properties - create TV specific connector properties
1244 * @num_modes: number of different TV formats (modes) supported
1245 * @modes: array of pointers to strings containing name of each format
1247 * Called by a driver's TV initialization routine, this function creates
1248 * the TV specific connector properties for a given device. Caller is
1249 * responsible for allocating a list of format names and passing them to
1252 int drm_mode_create_tv_properties(struct drm_device *dev,
1253 unsigned int num_modes,
1254 const char * const modes[])
1256 struct drm_property *tv_selector;
1257 struct drm_property *tv_subconnector;
1260 if (dev->mode_config.tv_select_subconnector_property)
1264 * Basic connector properties
1266 tv_selector = drm_property_create_enum(dev, 0,
1267 "select subconnector",
1268 drm_tv_select_enum_list,
1269 ARRAY_SIZE(drm_tv_select_enum_list));
1273 dev->mode_config.tv_select_subconnector_property = tv_selector;
1276 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1278 drm_tv_subconnector_enum_list,
1279 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1280 if (!tv_subconnector)
1282 dev->mode_config.tv_subconnector_property = tv_subconnector;
1285 * Other, TV specific properties: margins & TV modes.
1287 if (drm_mode_create_tv_margin_properties(dev))
1290 dev->mode_config.tv_mode_property =
1291 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1293 if (!dev->mode_config.tv_mode_property)
1296 for (i = 0; i < num_modes; i++)
1297 drm_property_add_enum(dev->mode_config.tv_mode_property,
1300 dev->mode_config.tv_brightness_property =
1301 drm_property_create_range(dev, 0, "brightness", 0, 100);
1302 if (!dev->mode_config.tv_brightness_property)
1305 dev->mode_config.tv_contrast_property =
1306 drm_property_create_range(dev, 0, "contrast", 0, 100);
1307 if (!dev->mode_config.tv_contrast_property)
1310 dev->mode_config.tv_flicker_reduction_property =
1311 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1312 if (!dev->mode_config.tv_flicker_reduction_property)
1315 dev->mode_config.tv_overscan_property =
1316 drm_property_create_range(dev, 0, "overscan", 0, 100);
1317 if (!dev->mode_config.tv_overscan_property)
1320 dev->mode_config.tv_saturation_property =
1321 drm_property_create_range(dev, 0, "saturation", 0, 100);
1322 if (!dev->mode_config.tv_saturation_property)
1325 dev->mode_config.tv_hue_property =
1326 drm_property_create_range(dev, 0, "hue", 0, 100);
1327 if (!dev->mode_config.tv_hue_property)
1334 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1337 * drm_mode_create_scaling_mode_property - create scaling mode property
1340 * Called by a driver the first time it's needed, must be attached to desired
1343 * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1344 * instead to correctly assign &drm_connector_state.picture_aspect_ratio
1345 * in the atomic state.
1347 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1349 struct drm_property *scaling_mode;
1351 if (dev->mode_config.scaling_mode_property)
1355 drm_property_create_enum(dev, 0, "scaling mode",
1356 drm_scaling_mode_enum_list,
1357 ARRAY_SIZE(drm_scaling_mode_enum_list));
1359 dev->mode_config.scaling_mode_property = scaling_mode;
1363 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1366 * DOC: Variable refresh properties
1368 * Variable refresh rate capable displays can dynamically adjust their
1369 * refresh rate by extending the duration of their vertical front porch
1370 * until page flip or timeout occurs. This can reduce or remove stuttering
1371 * and latency in scenarios where the page flip does not align with the
1374 * An example scenario would be an application flipping at a constant rate
1375 * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank
1376 * interval and the same contents will be displayed twice. This can be
1377 * observed as stuttering for content with motion.
1379 * If variable refresh rate was active on a display that supported a
1380 * variable refresh range from 35Hz to 60Hz no stuttering would be observable
1381 * for the example scenario. The minimum supported variable refresh rate of
1382 * 35Hz is below the page flip frequency and the vertical front porch can
1383 * be extended until the page flip occurs. The vblank interval will be
1384 * directly aligned to the page flip rate.
1386 * Not all userspace content is suitable for use with variable refresh rate.
1387 * Large and frequent changes in vertical front porch duration may worsen
1388 * perceived stuttering for input sensitive applications.
1390 * Panel brightness will also vary with vertical front porch duration. Some
1391 * panels may have noticeable differences in brightness between the minimum
1392 * vertical front porch duration and the maximum vertical front porch duration.
1393 * Large and frequent changes in vertical front porch duration may produce
1394 * observable flickering for such panels.
1396 * Userspace control for variable refresh rate is supported via properties
1397 * on the &drm_connector and &drm_crtc objects.
1400 * Optional &drm_connector boolean property that drivers should attach
1401 * with drm_connector_attach_vrr_capable_property() on connectors that
1402 * could support variable refresh rates. Drivers should update the
1403 * property value by calling drm_connector_set_vrr_capable_property().
1405 * Absence of the property should indicate absence of support.
1408 * Default &drm_crtc boolean property that notifies the driver that the
1409 * content on the CRTC is suitable for variable refresh rate presentation.
1410 * The driver will take this property as a hint to enable variable
1411 * refresh rate support if the receiver supports it, ie. if the
1412 * "vrr_capable" property is true on the &drm_connector object. The
1413 * vertical front porch duration will be extended until page-flip or
1414 * timeout when enabled.
1416 * The minimum vertical front porch duration is defined as the vertical
1417 * front porch duration for the current mode.
1419 * The maximum vertical front porch duration is greater than or equal to
1420 * the minimum vertical front porch duration. The duration is derived
1421 * from the minimum supported variable refresh rate for the connector.
1423 * The driver may place further restrictions within these minimum
1424 * and maximum bounds.
1428 * drm_connector_attach_vrr_capable_property - creates the
1429 * vrr_capable property
1430 * @connector: connector to create the vrr_capable property on.
1432 * This is used by atomic drivers to add support for querying
1433 * variable refresh rate capability for a connector.
1436 * Zero on success, negative errono on failure.
1438 int drm_connector_attach_vrr_capable_property(
1439 struct drm_connector *connector)
1441 struct drm_device *dev = connector->dev;
1442 struct drm_property *prop;
1444 if (!connector->vrr_capable_property) {
1445 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE,
1450 connector->vrr_capable_property = prop;
1451 drm_object_attach_property(&connector->base, prop, 0);
1456 EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property);
1459 * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1460 * @connector: connector to attach scaling mode property on.
1461 * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1463 * This is used to add support for scaling mode to atomic drivers.
1464 * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
1465 * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1467 * This is the atomic version of drm_mode_create_scaling_mode_property().
1470 * Zero on success, negative errno on failure.
1472 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1473 u32 scaling_mode_mask)
1475 struct drm_device *dev = connector->dev;
1476 struct drm_property *scaling_mode_property;
1478 const unsigned valid_scaling_mode_mask =
1479 (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1481 if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
1482 scaling_mode_mask & ~valid_scaling_mode_mask))
1485 scaling_mode_property =
1486 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1487 hweight32(scaling_mode_mask));
1489 if (!scaling_mode_property)
1492 for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1495 if (!(BIT(i) & scaling_mode_mask))
1498 ret = drm_property_add_enum(scaling_mode_property,
1499 drm_scaling_mode_enum_list[i].type,
1500 drm_scaling_mode_enum_list[i].name);
1503 drm_property_destroy(dev, scaling_mode_property);
1509 drm_object_attach_property(&connector->base,
1510 scaling_mode_property, 0);
1512 connector->scaling_mode_property = scaling_mode_property;
1516 EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1519 * drm_connector_attach_content_protection_property - attach content protection
1522 * @connector: connector to attach CP property on.
1524 * This is used to add support for content protection on select connectors.
1525 * Content Protection is intentionally vague to allow for different underlying
1526 * technologies, however it is most implemented by HDCP.
1528 * The content protection will be set to &drm_connector_state.content_protection
1531 * Zero on success, negative errno on failure.
1533 int drm_connector_attach_content_protection_property(
1534 struct drm_connector *connector)
1536 struct drm_device *dev = connector->dev;
1537 struct drm_property *prop;
1539 prop = drm_property_create_enum(dev, 0, "Content Protection",
1541 ARRAY_SIZE(drm_cp_enum_list));
1545 drm_object_attach_property(&connector->base, prop,
1546 DRM_MODE_CONTENT_PROTECTION_UNDESIRED);
1548 connector->content_protection_property = prop;
1552 EXPORT_SYMBOL(drm_connector_attach_content_protection_property);
1555 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1558 * Called by a driver the first time it's needed, must be attached to desired
1562 * Zero on success, negative errno on failure.
1564 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1566 if (dev->mode_config.aspect_ratio_property)
1569 dev->mode_config.aspect_ratio_property =
1570 drm_property_create_enum(dev, 0, "aspect ratio",
1571 drm_aspect_ratio_enum_list,
1572 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1574 if (dev->mode_config.aspect_ratio_property == NULL)
1579 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1582 * DOC: standard connector properties
1585 * drm_mode_create_colorspace_property - create colorspace property
1586 * This property helps select a suitable colorspace based on the sink
1587 * capability. Modern sink devices support wider gamut like BT2020.
1588 * This helps switch to BT2020 mode if the BT2020 encoded video stream
1589 * is being played by the user, same for any other colorspace. Thereby
1590 * giving a good visual experience to users.
1592 * The expectation from userspace is that it should parse the EDID
1593 * and get supported colorspaces. Use this property and switch to the
1594 * one supported. Sink supported colorspaces should be retrieved by
1595 * userspace from EDID and driver will not explicitly expose them.
1597 * Basically the expectation from userspace is:
1598 * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
1600 * - Set this new property to let the sink know what it
1601 * converted the CRTC output to.
1602 * - This property is just to inform sink what colorspace
1603 * source is trying to drive.
1605 * Called by a driver the first time it's needed, must be attached to desired
1608 int drm_mode_create_colorspace_property(struct drm_connector *connector)
1610 struct drm_device *dev = connector->dev;
1611 struct drm_property *prop;
1613 if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
1614 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
1615 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
1618 ARRAY_SIZE(hdmi_colorspaces));
1622 DRM_DEBUG_KMS("Colorspace property not supported\n");
1626 connector->colorspace_property = prop;
1630 EXPORT_SYMBOL(drm_mode_create_colorspace_property);
1633 * drm_mode_create_content_type_property - create content type property
1636 * Called by a driver the first time it's needed, must be attached to desired
1640 * Zero on success, negative errno on failure.
1642 int drm_mode_create_content_type_property(struct drm_device *dev)
1644 if (dev->mode_config.content_type_property)
1647 dev->mode_config.content_type_property =
1648 drm_property_create_enum(dev, 0, "content type",
1649 drm_content_type_enum_list,
1650 ARRAY_SIZE(drm_content_type_enum_list));
1652 if (dev->mode_config.content_type_property == NULL)
1657 EXPORT_SYMBOL(drm_mode_create_content_type_property);
1660 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1663 * Create the the suggested x/y offset property for connectors.
1665 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1667 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1670 dev->mode_config.suggested_x_property =
1671 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1673 dev->mode_config.suggested_y_property =
1674 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1676 if (dev->mode_config.suggested_x_property == NULL ||
1677 dev->mode_config.suggested_y_property == NULL)
1681 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1684 * drm_connector_set_path_property - set tile property on connector
1685 * @connector: connector to set property on.
1686 * @path: path to use for property; must not be NULL.
1688 * This creates a property to expose to userspace to specify a
1689 * connector path. This is mainly used for DisplayPort MST where
1690 * connectors have a topology and we want to allow userspace to give
1691 * them more meaningful names.
1694 * Zero on success, negative errno on failure.
1696 int drm_connector_set_path_property(struct drm_connector *connector,
1699 struct drm_device *dev = connector->dev;
1702 ret = drm_property_replace_global_blob(dev,
1703 &connector->path_blob_ptr,
1707 dev->mode_config.path_property);
1710 EXPORT_SYMBOL(drm_connector_set_path_property);
1713 * drm_connector_set_tile_property - set tile property on connector
1714 * @connector: connector to set property on.
1716 * This looks up the tile information for a connector, and creates a
1717 * property for userspace to parse if it exists. The property is of
1718 * the form of 8 integers using ':' as a separator.
1719 * This is used for dual port tiled displays with DisplayPort SST
1720 * or DisplayPort MST connectors.
1723 * Zero on success, errno on failure.
1725 int drm_connector_set_tile_property(struct drm_connector *connector)
1727 struct drm_device *dev = connector->dev;
1731 if (!connector->has_tile) {
1732 ret = drm_property_replace_global_blob(dev,
1733 &connector->tile_blob_ptr,
1737 dev->mode_config.tile_property);
1741 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
1742 connector->tile_group->id, connector->tile_is_single_monitor,
1743 connector->num_h_tile, connector->num_v_tile,
1744 connector->tile_h_loc, connector->tile_v_loc,
1745 connector->tile_h_size, connector->tile_v_size);
1747 ret = drm_property_replace_global_blob(dev,
1748 &connector->tile_blob_ptr,
1752 dev->mode_config.tile_property);
1755 EXPORT_SYMBOL(drm_connector_set_tile_property);
1758 * drm_connector_update_edid_property - update the edid property of a connector
1759 * @connector: drm connector
1760 * @edid: new value of the edid property
1762 * This function creates a new blob modeset object and assigns its id to the
1763 * connector's edid property.
1764 * Since we also parse tile information from EDID's displayID block, we also
1765 * set the connector's tile property here. See drm_connector_set_tile_property()
1769 * Zero on success, negative errno on failure.
1771 int drm_connector_update_edid_property(struct drm_connector *connector,
1772 const struct edid *edid)
1774 struct drm_device *dev = connector->dev;
1778 /* ignore requests to set edid when overridden */
1779 if (connector->override_edid)
1783 size = EDID_LENGTH * (1 + edid->extensions);
1785 /* Set the display info, using edid if available, otherwise
1786 * reseting the values to defaults. This duplicates the work
1787 * done in drm_add_edid_modes, but that function is not
1788 * consistently called before this one in all drivers and the
1789 * computation is cheap enough that it seems better to
1790 * duplicate it rather than attempt to ensure some arbitrary
1791 * ordering of calls.
1794 drm_add_display_info(connector, edid);
1796 drm_reset_display_info(connector);
1798 drm_object_property_set_value(&connector->base,
1799 dev->mode_config.non_desktop_property,
1800 connector->display_info.non_desktop);
1802 ret = drm_property_replace_global_blob(dev,
1803 &connector->edid_blob_ptr,
1807 dev->mode_config.edid_property);
1810 return drm_connector_set_tile_property(connector);
1812 EXPORT_SYMBOL(drm_connector_update_edid_property);
1815 * drm_connector_set_link_status_property - Set link status property of a connector
1816 * @connector: drm connector
1817 * @link_status: new value of link status property (0: Good, 1: Bad)
1819 * In usual working scenario, this link status property will always be set to
1820 * "GOOD". If something fails during or after a mode set, the kernel driver
1821 * may set this link status property to "BAD". The caller then needs to send a
1822 * hotplug uevent for userspace to re-check the valid modes through
1823 * GET_CONNECTOR_IOCTL and retry modeset.
1825 * Note: Drivers cannot rely on userspace to support this property and
1826 * issue a modeset. As such, they may choose to handle issues (like
1827 * re-training a link) without userspace's intervention.
1829 * The reason for adding this property is to handle link training failures, but
1830 * it is not limited to DP or link training. For example, if we implement
1831 * asynchronous setcrtc, this property can be used to report any failures in that.
1833 void drm_connector_set_link_status_property(struct drm_connector *connector,
1834 uint64_t link_status)
1836 struct drm_device *dev = connector->dev;
1838 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1839 connector->state->link_status = link_status;
1840 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1842 EXPORT_SYMBOL(drm_connector_set_link_status_property);
1845 * drm_connector_attach_max_bpc_property - attach "max bpc" property
1846 * @connector: connector to attach max bpc property on.
1847 * @min: The minimum bit depth supported by the connector.
1848 * @max: The maximum bit depth supported by the connector.
1850 * This is used to add support for limiting the bit depth on a connector.
1853 * Zero on success, negative errno on failure.
1855 int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
1858 struct drm_device *dev = connector->dev;
1859 struct drm_property *prop;
1861 prop = connector->max_bpc_property;
1863 prop = drm_property_create_range(dev, 0, "max bpc", min, max);
1867 connector->max_bpc_property = prop;
1870 drm_object_attach_property(&connector->base, prop, max);
1871 connector->state->max_requested_bpc = max;
1872 connector->state->max_bpc = max;
1876 EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
1879 * drm_connector_set_vrr_capable_property - sets the variable refresh rate
1880 * capable property for a connector
1881 * @connector: drm connector
1882 * @capable: True if the connector is variable refresh rate capable
1884 * Should be used by atomic drivers to update the indicated support for
1885 * variable refresh rate over a connector.
1887 void drm_connector_set_vrr_capable_property(
1888 struct drm_connector *connector, bool capable)
1890 drm_object_property_set_value(&connector->base,
1891 connector->vrr_capable_property,
1894 EXPORT_SYMBOL(drm_connector_set_vrr_capable_property);
1897 * drm_connector_init_panel_orientation_property -
1898 * initialize the connecters panel_orientation property
1899 * @connector: connector for which to init the panel-orientation property.
1900 * @width: width in pixels of the panel, used for panel quirk detection
1901 * @height: height in pixels of the panel, used for panel quirk detection
1903 * This function should only be called for built-in panels, after setting
1904 * connector->display_info.panel_orientation first (if known).
1906 * This function will check for platform specific (e.g. DMI based) quirks
1907 * overriding display_info.panel_orientation first, then if panel_orientation
1908 * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the
1909 * "panel orientation" property to the connector.
1912 * Zero on success, negative errno on failure.
1914 int drm_connector_init_panel_orientation_property(
1915 struct drm_connector *connector, int width, int height)
1917 struct drm_device *dev = connector->dev;
1918 struct drm_display_info *info = &connector->display_info;
1919 struct drm_property *prop;
1920 int orientation_quirk;
1922 orientation_quirk = drm_get_panel_orientation_quirk(width, height);
1923 if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1924 info->panel_orientation = orientation_quirk;
1926 if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1929 prop = dev->mode_config.panel_orientation_property;
1931 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1932 "panel orientation",
1933 drm_panel_orientation_enum_list,
1934 ARRAY_SIZE(drm_panel_orientation_enum_list));
1938 dev->mode_config.panel_orientation_property = prop;
1941 drm_object_attach_property(&connector->base, prop,
1942 info->panel_orientation);
1945 EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
1947 int drm_connector_set_obj_prop(struct drm_mode_object *obj,
1948 struct drm_property *property,
1952 struct drm_connector *connector = obj_to_connector(obj);
1954 /* Do DPMS ourselves */
1955 if (property == connector->dev->mode_config.dpms_property) {
1956 ret = (*connector->funcs->dpms)(connector, (int)value);
1957 } else if (connector->funcs->set_property)
1958 ret = connector->funcs->set_property(connector, property, value);
1961 drm_object_property_set_value(&connector->base, property, value);
1965 int drm_connector_property_set_ioctl(struct drm_device *dev,
1966 void *data, struct drm_file *file_priv)
1968 struct drm_mode_connector_set_property *conn_set_prop = data;
1969 struct drm_mode_obj_set_property obj_set_prop = {
1970 .value = conn_set_prop->value,
1971 .prop_id = conn_set_prop->prop_id,
1972 .obj_id = conn_set_prop->connector_id,
1973 .obj_type = DRM_MODE_OBJECT_CONNECTOR
1976 /* It does all the locking and checking we need */
1977 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
1980 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1982 /* For atomic drivers only state objects are synchronously updated and
1983 * protected by modeset locks, so check those first. */
1984 if (connector->state)
1985 return connector->state->best_encoder;
1986 return connector->encoder;
1990 drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1991 const struct list_head *export_list,
1992 const struct drm_file *file_priv)
1995 * If user-space hasn't configured the driver to expose the stereo 3D
1996 * modes, don't expose them.
1998 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
2001 * If user-space hasn't configured the driver to expose the modes
2002 * with aspect-ratio, don't expose them. However if such a mode
2003 * is unique, let it be exposed, but reset the aspect-ratio flags
2004 * while preparing the list of user-modes.
2006 if (!file_priv->aspect_ratio_allowed) {
2007 struct drm_display_mode *mode_itr;
2009 list_for_each_entry(mode_itr, export_list, export_head)
2010 if (drm_mode_match(mode_itr, mode,
2011 DRM_MODE_MATCH_TIMINGS |
2012 DRM_MODE_MATCH_CLOCK |
2013 DRM_MODE_MATCH_FLAGS |
2014 DRM_MODE_MATCH_3D_FLAGS))
2021 int drm_mode_getconnector(struct drm_device *dev, void *data,
2022 struct drm_file *file_priv)
2024 struct drm_mode_get_connector *out_resp = data;
2025 struct drm_connector *connector;
2026 struct drm_encoder *encoder;
2027 struct drm_display_mode *mode;
2029 int encoders_count = 0;
2033 struct drm_mode_modeinfo u_mode;
2034 struct drm_mode_modeinfo __user *mode_ptr;
2035 uint32_t __user *encoder_ptr;
2036 LIST_HEAD(export_list);
2038 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2041 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2043 connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
2047 drm_connector_for_each_possible_encoder(connector, encoder, i)
2050 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2052 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2054 drm_connector_for_each_possible_encoder(connector, encoder, i) {
2055 if (put_user(encoder->base.id, encoder_ptr + copied)) {
2062 out_resp->count_encoders = encoders_count;
2064 out_resp->connector_id = connector->base.id;
2065 out_resp->connector_type = connector->connector_type;
2066 out_resp->connector_type_id = connector->connector_type_id;
2068 mutex_lock(&dev->mode_config.mutex);
2069 if (out_resp->count_modes == 0) {
2070 connector->funcs->fill_modes(connector,
2071 dev->mode_config.max_width,
2072 dev->mode_config.max_height);
2075 out_resp->mm_width = connector->display_info.width_mm;
2076 out_resp->mm_height = connector->display_info.height_mm;
2077 out_resp->subpixel = connector->display_info.subpixel_order;
2078 out_resp->connection = connector->status;
2080 /* delayed so we get modes regardless of pre-fill_modes state */
2081 list_for_each_entry(mode, &connector->modes, head)
2082 if (drm_mode_expose_to_userspace(mode, &export_list,
2084 list_add_tail(&mode->export_head, &export_list);
2089 * This ioctl is called twice, once to determine how much space is
2090 * needed, and the 2nd time to fill it.
2091 * The modes that need to be exposed to the user are maintained in the
2092 * 'export_list'. When the ioctl is called first time to determine the,
2093 * space, the export_list gets filled, to find the no.of modes. In the
2094 * 2nd time, the user modes are filled, one by one from the export_list.
2096 if ((out_resp->count_modes >= mode_count) && mode_count) {
2098 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2099 list_for_each_entry(mode, &export_list, export_head) {
2100 drm_mode_convert_to_umode(&u_mode, mode);
2102 * Reset aspect ratio flags of user-mode, if modes with
2103 * aspect-ratio are not supported.
2105 if (!file_priv->aspect_ratio_allowed)
2106 u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
2107 if (copy_to_user(mode_ptr + copied,
2108 &u_mode, sizeof(u_mode))) {
2110 mutex_unlock(&dev->mode_config.mutex);
2117 out_resp->count_modes = mode_count;
2118 mutex_unlock(&dev->mode_config.mutex);
2120 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2121 encoder = drm_connector_get_encoder(connector);
2123 out_resp->encoder_id = encoder->base.id;
2125 out_resp->encoder_id = 0;
2127 /* Only grab properties after probing, to make sure EDID and other
2128 * properties reflect the latest status. */
2129 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
2130 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2131 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2132 &out_resp->count_props);
2133 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2136 drm_connector_put(connector);
2145 * Tile groups are used to represent tiled monitors with a unique integer
2146 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
2147 * we store this in a tile group, so we have a common identifier for all tiles
2148 * in a monitor group. The property is called "TILE". Drivers can manage tile
2149 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
2150 * drm_mode_get_tile_group(). But this is only needed for internal panels where
2151 * the tile group information is exposed through a non-standard way.
2154 static void drm_tile_group_free(struct kref *kref)
2156 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
2157 struct drm_device *dev = tg->dev;
2158 mutex_lock(&dev->mode_config.idr_mutex);
2159 idr_remove(&dev->mode_config.tile_idr, tg->id);
2160 mutex_unlock(&dev->mode_config.idr_mutex);
2165 * drm_mode_put_tile_group - drop a reference to a tile group.
2167 * @tg: tile group to drop reference to.
2169 * drop reference to tile group and free if 0.
2171 void drm_mode_put_tile_group(struct drm_device *dev,
2172 struct drm_tile_group *tg)
2174 kref_put(&tg->refcount, drm_tile_group_free);
2176 EXPORT_SYMBOL(drm_mode_put_tile_group);
2179 * drm_mode_get_tile_group - get a reference to an existing tile group
2181 * @topology: 8-bytes unique per monitor.
2183 * Use the unique bytes to get a reference to an existing tile group.
2186 * tile group or NULL if not found.
2188 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
2191 struct drm_tile_group *tg;
2193 mutex_lock(&dev->mode_config.idr_mutex);
2194 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
2195 if (!memcmp(tg->group_data, topology, 8)) {
2196 if (!kref_get_unless_zero(&tg->refcount))
2198 mutex_unlock(&dev->mode_config.idr_mutex);
2202 mutex_unlock(&dev->mode_config.idr_mutex);
2205 EXPORT_SYMBOL(drm_mode_get_tile_group);
2208 * drm_mode_create_tile_group - create a tile group from a displayid description
2210 * @topology: 8-bytes unique per monitor.
2212 * Create a tile group for the unique monitor, and get a unique
2213 * identifier for the tile group.
2216 * new tile group or NULL.
2218 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
2221 struct drm_tile_group *tg;
2224 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
2228 kref_init(&tg->refcount);
2229 memcpy(tg->group_data, topology, 8);
2232 mutex_lock(&dev->mode_config.idr_mutex);
2233 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
2241 mutex_unlock(&dev->mode_config.idr_mutex);
2244 EXPORT_SYMBOL(drm_mode_create_tile_group);