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" },
95 { DRM_MODE_CONNECTOR_SPI, "SPI" },
98 void drm_connector_ida_init(void)
102 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
103 ida_init(&drm_connector_enum_list[i].ida);
106 void drm_connector_ida_destroy(void)
110 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
111 ida_destroy(&drm_connector_enum_list[i].ida);
115 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
116 * @connector: connector to quwery
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
124 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
126 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
129 if (fb_get_options(connector->name, &option))
132 if (!drm_mode_parse_command_line_for_connector(option,
138 DRM_INFO("forcing %s connector %s\n", connector->name,
139 drm_get_connector_force_name(mode->force));
140 connector->force = mode->force;
143 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" : "");
152 static void drm_connector_free(struct kref *kref)
154 struct drm_connector *connector =
155 container_of(kref, struct drm_connector, base.refcount);
156 struct drm_device *dev = connector->dev;
158 drm_mode_object_unregister(dev, &connector->base);
159 connector->funcs->destroy(connector);
162 void drm_connector_free_work_fn(struct work_struct *work)
164 struct drm_connector *connector, *n;
165 struct drm_device *dev =
166 container_of(work, struct drm_device, mode_config.connector_free_work);
167 struct drm_mode_config *config = &dev->mode_config;
169 struct llist_node *freed;
171 spin_lock_irqsave(&config->connector_list_lock, flags);
172 freed = llist_del_all(&config->connector_free_list);
173 spin_unlock_irqrestore(&config->connector_list_lock, flags);
175 llist_for_each_entry_safe(connector, n, freed, free_node) {
176 drm_mode_object_unregister(dev, &connector->base);
177 connector->funcs->destroy(connector);
182 * drm_connector_init - Init a preallocated connector
184 * @connector: the connector to init
185 * @funcs: callbacks for this connector
186 * @connector_type: user visible type of the connector
188 * Initialises a preallocated connector. Connectors should be
189 * subclassed as part of driver connector objects.
192 * Zero on success, error code on failure.
194 int drm_connector_init(struct drm_device *dev,
195 struct drm_connector *connector,
196 const struct drm_connector_funcs *funcs,
199 struct drm_mode_config *config = &dev->mode_config;
201 struct ida *connector_ida =
202 &drm_connector_enum_list[connector_type].ida;
204 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
205 (!funcs->atomic_destroy_state ||
206 !funcs->atomic_duplicate_state));
208 ret = __drm_mode_object_add(dev, &connector->base,
209 DRM_MODE_OBJECT_CONNECTOR,
210 false, drm_connector_free);
214 connector->base.properties = &connector->properties;
215 connector->dev = dev;
216 connector->funcs = funcs;
218 /* connector index is used with 32bit bitmasks */
219 ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
221 DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
222 drm_connector_enum_list[connector_type].name,
226 connector->index = ret;
229 connector->connector_type = connector_type;
230 connector->connector_type_id =
231 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
232 if (connector->connector_type_id < 0) {
233 ret = connector->connector_type_id;
237 kasprintf(GFP_KERNEL, "%s-%d",
238 drm_connector_enum_list[connector_type].name,
239 connector->connector_type_id);
240 if (!connector->name) {
242 goto out_put_type_id;
245 INIT_LIST_HEAD(&connector->probed_modes);
246 INIT_LIST_HEAD(&connector->modes);
247 mutex_init(&connector->mutex);
248 connector->edid_blob_ptr = NULL;
249 connector->tile_blob_ptr = NULL;
250 connector->status = connector_status_unknown;
251 connector->display_info.panel_orientation =
252 DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
254 drm_connector_get_cmdline_mode(connector);
256 /* We should add connectors at the end to avoid upsetting the connector
258 spin_lock_irq(&config->connector_list_lock);
259 list_add_tail(&connector->head, &config->connector_list);
260 config->num_connector++;
261 spin_unlock_irq(&config->connector_list_lock);
263 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL &&
264 connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
265 drm_connector_attach_edid_property(connector);
267 drm_object_attach_property(&connector->base,
268 config->dpms_property, 0);
270 drm_object_attach_property(&connector->base,
271 config->link_status_property,
274 drm_object_attach_property(&connector->base,
275 config->non_desktop_property,
277 drm_object_attach_property(&connector->base,
278 config->tile_property,
281 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
282 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
285 connector->debugfs_entry = NULL;
288 ida_simple_remove(connector_ida, connector->connector_type_id);
291 ida_simple_remove(&config->connector_ida, connector->index);
294 drm_mode_object_unregister(dev, &connector->base);
298 EXPORT_SYMBOL(drm_connector_init);
301 * drm_connector_init_with_ddc - Init a preallocated connector
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
308 * Initialises a preallocated connector. Connectors should be
309 * subclassed as part of driver connector objects.
311 * Ensures that the ddc field of the connector is correctly set.
314 * Zero on success, error code on failure.
316 int drm_connector_init_with_ddc(struct drm_device *dev,
317 struct drm_connector *connector,
318 const struct drm_connector_funcs *funcs,
320 struct i2c_adapter *ddc)
324 ret = drm_connector_init(dev, connector, funcs, connector_type);
328 /* provide ddc symlink in sysfs */
329 connector->ddc = ddc;
333 EXPORT_SYMBOL(drm_connector_init_with_ddc);
336 * drm_connector_attach_edid_property - attach edid property.
337 * @connector: the connector
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.
343 void drm_connector_attach_edid_property(struct drm_connector *connector)
345 struct drm_mode_config *config = &connector->dev->mode_config;
347 drm_object_attach_property(&connector->base,
348 config->edid_property,
351 EXPORT_SYMBOL(drm_connector_attach_edid_property);
354 * drm_connector_attach_encoder - attach a connector to an encoder
355 * @connector: connector to attach
356 * @encoder: encoder to attach @connector to
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.
363 * Zero on success, negative errno on failure.
365 int drm_connector_attach_encoder(struct drm_connector *connector,
366 struct drm_encoder *encoder)
371 * In the past, drivers have attempted to model the static association
372 * of connector to encoder in simple connector/encoder devices using a
373 * direct assignment of connector->encoder = encoder. This connection
374 * is a logical one and the responsibility of the core, so drivers are
375 * expected not to mess with this.
377 * Note that the error return should've been enough here, but a large
378 * majority of drivers ignores the return value, so add in a big WARN
379 * to get people's attention.
381 if (WARN_ON(connector->encoder))
384 for (i = 0; i < ARRAY_SIZE(connector->encoder_ids); i++) {
385 if (connector->encoder_ids[i] == 0) {
386 connector->encoder_ids[i] = encoder->base.id;
392 EXPORT_SYMBOL(drm_connector_attach_encoder);
395 * drm_connector_has_possible_encoder - check if the connector and encoder are assosicated with each other
396 * @connector: the connector
397 * @encoder: the encoder
400 * True if @encoder is one of the possible encoders for @connector.
402 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
403 struct drm_encoder *encoder)
405 struct drm_encoder *enc;
408 drm_connector_for_each_possible_encoder(connector, enc, i) {
415 EXPORT_SYMBOL(drm_connector_has_possible_encoder);
417 static void drm_mode_remove(struct drm_connector *connector,
418 struct drm_display_mode *mode)
420 list_del(&mode->head);
421 drm_mode_destroy(connector->dev, mode);
425 * drm_connector_cleanup - cleans up an initialised connector
426 * @connector: connector to cleanup
428 * Cleans up the connector but doesn't free the object.
430 void drm_connector_cleanup(struct drm_connector *connector)
432 struct drm_device *dev = connector->dev;
433 struct drm_display_mode *mode, *t;
435 /* The connector should have been removed from userspace long before
436 * it is finally destroyed.
438 if (WARN_ON(connector->registration_state ==
439 DRM_CONNECTOR_REGISTERED))
440 drm_connector_unregister(connector);
442 if (connector->tile_group) {
443 drm_mode_put_tile_group(dev, connector->tile_group);
444 connector->tile_group = NULL;
447 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
448 drm_mode_remove(connector, mode);
450 list_for_each_entry_safe(mode, t, &connector->modes, head)
451 drm_mode_remove(connector, mode);
453 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
454 connector->connector_type_id);
456 ida_simple_remove(&dev->mode_config.connector_ida,
459 kfree(connector->display_info.bus_formats);
460 drm_mode_object_unregister(dev, &connector->base);
461 kfree(connector->name);
462 connector->name = NULL;
463 spin_lock_irq(&dev->mode_config.connector_list_lock);
464 list_del(&connector->head);
465 dev->mode_config.num_connector--;
466 spin_unlock_irq(&dev->mode_config.connector_list_lock);
468 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
469 if (connector->state && connector->funcs->atomic_destroy_state)
470 connector->funcs->atomic_destroy_state(connector,
473 mutex_destroy(&connector->mutex);
475 memset(connector, 0, sizeof(*connector));
477 EXPORT_SYMBOL(drm_connector_cleanup);
480 * drm_connector_register - register a connector
481 * @connector: the connector to register
483 * Register userspace interfaces for a connector
486 * Zero on success, error code on failure.
488 int drm_connector_register(struct drm_connector *connector)
492 if (!connector->dev->registered)
495 mutex_lock(&connector->mutex);
496 if (connector->registration_state != DRM_CONNECTOR_INITIALIZING)
499 ret = drm_sysfs_connector_add(connector);
503 drm_debugfs_connector_add(connector);
505 if (connector->funcs->late_register) {
506 ret = connector->funcs->late_register(connector);
511 drm_mode_object_register(connector->dev, &connector->base);
513 connector->registration_state = DRM_CONNECTOR_REGISTERED;
517 drm_debugfs_connector_remove(connector);
518 drm_sysfs_connector_remove(connector);
520 mutex_unlock(&connector->mutex);
523 EXPORT_SYMBOL(drm_connector_register);
526 * drm_connector_unregister - unregister a connector
527 * @connector: the connector to unregister
529 * Unregister userspace interfaces for a connector
531 void drm_connector_unregister(struct drm_connector *connector)
533 mutex_lock(&connector->mutex);
534 if (connector->registration_state != DRM_CONNECTOR_REGISTERED) {
535 mutex_unlock(&connector->mutex);
539 if (connector->funcs->early_unregister)
540 connector->funcs->early_unregister(connector);
542 drm_sysfs_connector_remove(connector);
543 drm_debugfs_connector_remove(connector);
545 connector->registration_state = DRM_CONNECTOR_UNREGISTERED;
546 mutex_unlock(&connector->mutex);
548 EXPORT_SYMBOL(drm_connector_unregister);
550 void drm_connector_unregister_all(struct drm_device *dev)
552 struct drm_connector *connector;
553 struct drm_connector_list_iter conn_iter;
555 drm_connector_list_iter_begin(dev, &conn_iter);
556 drm_for_each_connector_iter(connector, &conn_iter)
557 drm_connector_unregister(connector);
558 drm_connector_list_iter_end(&conn_iter);
561 int drm_connector_register_all(struct drm_device *dev)
563 struct drm_connector *connector;
564 struct drm_connector_list_iter conn_iter;
567 drm_connector_list_iter_begin(dev, &conn_iter);
568 drm_for_each_connector_iter(connector, &conn_iter) {
569 ret = drm_connector_register(connector);
573 drm_connector_list_iter_end(&conn_iter);
576 drm_connector_unregister_all(dev);
581 * drm_get_connector_status_name - return a string for connector status
582 * @status: connector status to compute name of
584 * In contrast to the other drm_get_*_name functions this one here returns a
585 * const pointer and hence is threadsafe.
587 const char *drm_get_connector_status_name(enum drm_connector_status status)
589 if (status == connector_status_connected)
591 else if (status == connector_status_disconnected)
592 return "disconnected";
596 EXPORT_SYMBOL(drm_get_connector_status_name);
599 * drm_get_connector_force_name - return a string for connector force
600 * @force: connector force to get name of
602 * Returns: const pointer to name.
604 const char *drm_get_connector_force_name(enum drm_connector_force force)
607 case DRM_FORCE_UNSPECIFIED:
608 return "unspecified";
613 case DRM_FORCE_ON_DIGITAL:
620 #ifdef CONFIG_LOCKDEP
621 static struct lockdep_map connector_list_iter_dep_map = {
622 .name = "drm_connector_list_iter"
627 * drm_connector_list_iter_begin - initialize a connector_list iterator
629 * @iter: connector_list iterator
631 * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
632 * must always be cleaned up again by calling drm_connector_list_iter_end().
633 * Iteration itself happens using drm_connector_list_iter_next() or
634 * drm_for_each_connector_iter().
636 void drm_connector_list_iter_begin(struct drm_device *dev,
637 struct drm_connector_list_iter *iter)
641 lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
643 EXPORT_SYMBOL(drm_connector_list_iter_begin);
646 * Extra-safe connector put function that works in any context. Should only be
647 * used from the connector_iter functions, where we never really expect to
648 * actually release the connector when dropping our final reference.
651 __drm_connector_put_safe(struct drm_connector *conn)
653 struct drm_mode_config *config = &conn->dev->mode_config;
655 lockdep_assert_held(&config->connector_list_lock);
657 if (!refcount_dec_and_test(&conn->base.refcount.refcount))
660 llist_add(&conn->free_node, &config->connector_free_list);
661 schedule_work(&config->connector_free_work);
665 * drm_connector_list_iter_next - return next connector
666 * @iter: connector_list iterator
668 * Returns the next connector for @iter, or NULL when the list walk has
671 struct drm_connector *
672 drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
674 struct drm_connector *old_conn = iter->conn;
675 struct drm_mode_config *config = &iter->dev->mode_config;
676 struct list_head *lhead;
679 spin_lock_irqsave(&config->connector_list_lock, flags);
680 lhead = old_conn ? &old_conn->head : &config->connector_list;
683 if (lhead->next == &config->connector_list) {
689 iter->conn = list_entry(lhead, struct drm_connector, head);
691 /* loop until it's not a zombie connector */
692 } while (!kref_get_unless_zero(&iter->conn->base.refcount));
695 __drm_connector_put_safe(old_conn);
696 spin_unlock_irqrestore(&config->connector_list_lock, flags);
700 EXPORT_SYMBOL(drm_connector_list_iter_next);
703 * drm_connector_list_iter_end - tear down a connector_list iterator
704 * @iter: connector_list iterator
706 * Tears down @iter and releases any resources (like &drm_connector references)
707 * acquired while walking the list. This must always be called, both when the
708 * iteration completes fully or when it was aborted without walking the entire
711 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
713 struct drm_mode_config *config = &iter->dev->mode_config;
718 spin_lock_irqsave(&config->connector_list_lock, flags);
719 __drm_connector_put_safe(iter->conn);
720 spin_unlock_irqrestore(&config->connector_list_lock, flags);
722 lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
724 EXPORT_SYMBOL(drm_connector_list_iter_end);
726 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
727 { SubPixelUnknown, "Unknown" },
728 { SubPixelHorizontalRGB, "Horizontal RGB" },
729 { SubPixelHorizontalBGR, "Horizontal BGR" },
730 { SubPixelVerticalRGB, "Vertical RGB" },
731 { SubPixelVerticalBGR, "Vertical BGR" },
732 { SubPixelNone, "None" },
736 * drm_get_subpixel_order_name - return a string for a given subpixel enum
737 * @order: enum of subpixel_order
739 * Note you could abuse this and return something out of bounds, but that
740 * would be a caller error. No unscrubbed user data should make it here.
742 const char *drm_get_subpixel_order_name(enum subpixel_order order)
744 return drm_subpixel_enum_list[order].name;
746 EXPORT_SYMBOL(drm_get_subpixel_order_name);
748 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
749 { DRM_MODE_DPMS_ON, "On" },
750 { DRM_MODE_DPMS_STANDBY, "Standby" },
751 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
752 { DRM_MODE_DPMS_OFF, "Off" }
754 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
756 static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
757 { DRM_MODE_LINK_STATUS_GOOD, "Good" },
758 { DRM_MODE_LINK_STATUS_BAD, "Bad" },
762 * drm_display_info_set_bus_formats - set the supported bus formats
763 * @info: display info to store bus formats in
764 * @formats: array containing the supported bus formats
765 * @num_formats: the number of entries in the fmts array
767 * Store the supported bus formats in display info structure.
768 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
769 * a full list of available formats.
771 int drm_display_info_set_bus_formats(struct drm_display_info *info,
773 unsigned int num_formats)
777 if (!formats && num_formats)
780 if (formats && num_formats) {
781 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
787 kfree(info->bus_formats);
788 info->bus_formats = fmts;
789 info->num_bus_formats = num_formats;
793 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
795 /* Optional connector properties. */
796 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
797 { DRM_MODE_SCALE_NONE, "None" },
798 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
799 { DRM_MODE_SCALE_CENTER, "Center" },
800 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
803 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
804 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
805 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
806 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
809 static const struct drm_prop_enum_list drm_content_type_enum_list[] = {
810 { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" },
811 { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" },
812 { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" },
813 { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" },
814 { DRM_MODE_CONTENT_TYPE_GAME, "Game" },
817 static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
818 { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
819 { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
820 { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
821 { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
824 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
825 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
826 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
827 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
829 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
831 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
832 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
833 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
834 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
836 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
837 drm_dvi_i_subconnector_enum_list)
839 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
840 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
841 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
842 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
843 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
844 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
846 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
848 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
849 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
850 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
851 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
852 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
853 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
855 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
856 drm_tv_subconnector_enum_list)
858 static const struct drm_prop_enum_list hdmi_colorspaces[] = {
859 /* For Default case, driver will set the colorspace */
860 { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
861 /* Standard Definition Colorimetry based on CEA 861 */
862 { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" },
863 { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
864 /* Standard Definition Colorimetry based on IEC 61966-2-4 */
865 { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
866 /* High Definition Colorimetry based on IEC 61966-2-4 */
867 { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
868 /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
869 { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
870 /* Colorimetry based on IEC 61966-2-5 [33] */
871 { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
872 /* Colorimetry based on IEC 61966-2-5 */
873 { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
874 /* Colorimetry based on ITU-R BT.2020 */
875 { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
876 /* Colorimetry based on ITU-R BT.2020 */
877 { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
878 /* Colorimetry based on ITU-R BT.2020 */
879 { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
880 /* Added as part of Additional Colorimetry Extension in 861.G */
881 { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
882 { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" },
886 * DOC: standard connector properties
888 * DRM connectors have a few standardized properties:
891 * Blob property which contains the current EDID read from the sink. This
892 * is useful to parse sink identification information like vendor, model
893 * and serial. Drivers should update this property by calling
894 * drm_connector_update_edid_property(), usually after having parsed
895 * the EDID using drm_add_edid_modes(). Userspace cannot change this
898 * Legacy property for setting the power state of the connector. For atomic
899 * drivers this is only provided for backwards compatibility with existing
900 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
901 * connector is linked to. Drivers should never set this property directly,
902 * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
903 * callback. For atomic drivers the remapping to the "ACTIVE" property is
904 * implemented in the DRM core. This is the only standard connector
905 * property that userspace can change.
907 * Note that this property cannot be set through the MODE_ATOMIC ioctl,
908 * userspace must use "ACTIVE" on the CRTC instead.
912 * For userspace also running on legacy drivers the "DPMS" semantics are a
913 * lot more complicated. First, userspace cannot rely on the "DPMS" value
914 * returned by the GETCONNECTOR actually reflecting reality, because many
915 * drivers fail to update it. For atomic drivers this is taken care of in
916 * drm_atomic_helper_update_legacy_modeset_state().
918 * The second issue is that the DPMS state is only well-defined when the
919 * connector is connected to a CRTC. In atomic the DRM core enforces that
920 * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
922 * Finally, when enabling an output using the legacy SETCONFIG ioctl then
923 * "DPMS" is forced to ON. But see above, that might not be reflected in
924 * the software value on legacy drivers.
926 * Summarizing: Only set "DPMS" when the connector is known to be enabled,
927 * assume that a successful SETCONFIG call also sets "DPMS" to on, and
928 * never read back the value of "DPMS" because it can be incorrect.
930 * Connector path property to identify how this sink is physically
931 * connected. Used by DP MST. This should be set by calling
932 * drm_connector_set_path_property(), in the case of DP MST with the
933 * path property the MST manager created. Userspace cannot change this
936 * Connector tile group property to indicate how a set of DRM connector
937 * compose together into one logical screen. This is used by both high-res
938 * external screens (often only using a single cable, but exposing multiple
939 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
940 * are not gen-locked. Note that for tiled panels which are genlocked, like
941 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
942 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
943 * should update this value using drm_connector_set_tile_property().
944 * Userspace cannot change this property.
946 * Connector link-status property to indicate the status of link. The
947 * default value of link-status is "GOOD". If something fails during or
948 * after modeset, the kernel driver may set this to "BAD" and issue a
949 * hotplug uevent. Drivers should update this value using
950 * drm_connector_set_link_status_property().
952 * Indicates the output should be ignored for purposes of displaying a
953 * standard desktop environment or console. This is most likely because
954 * the output device is not rectilinear.
955 * Content Protection:
956 * This property is used by userspace to request the kernel protect future
957 * content communicated over the link. When requested, kernel will apply
958 * the appropriate means of protection (most often HDCP), and use the
959 * property to tell userspace the protection is active.
961 * Drivers can set this up by calling
962 * drm_connector_attach_content_protection_property() on initialization.
964 * The value of this property can be one of the following:
966 * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
967 * The link is not protected, content is transmitted in the clear.
968 * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
969 * Userspace has requested content protection, but the link is not
970 * currently protected. When in this state, kernel should enable
971 * Content Protection as soon as possible.
972 * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
973 * Userspace has requested content protection, and the link is
974 * protected. Only the driver can set the property to this value.
975 * If userspace attempts to set to ENABLED, kernel will return
980 * - DESIRED state should be preserved until userspace de-asserts it by
981 * setting the property to UNDESIRED. This means ENABLED should only
982 * transition to UNDESIRED when the user explicitly requests it.
983 * - If the state is DESIRED, kernel should attempt to re-authenticate the
984 * link whenever possible. This includes across disable/enable, dpms,
985 * hotplug, downstream device changes, link status failures, etc..
986 * - Userspace is responsible for polling the property to determine when
987 * the value transitions from ENABLED to DESIRED. This signifies the link
988 * is no longer protected and userspace should take appropriate action
989 * (whatever that might be).
992 * This Enum property is used by the userspace to declare the content type
993 * of the display stream, to kernel. Here display stream stands for any
994 * display content that userspace intended to display through HDCP
997 * Content Type of a stream is decided by the owner of the stream, as
998 * "HDCP Type0" or "HDCP Type1".
1000 * The value of the property can be one of the below:
1001 * - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0
1002 * - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1
1004 * When kernel starts the HDCP authentication (see "Content Protection"
1005 * for details), it uses the content type in "HDCP Content Type"
1006 * for performing the HDCP authentication with the display sink.
1008 * Please note in HDCP spec versions, a link can be authenticated with
1009 * HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be
1010 * authenticated with HDCP1.4 only for Content Type 0(though it is implicit
1011 * in nature. As there is no reference for Content Type in HDCP1.4).
1013 * HDCP2.2 authentication protocol itself takes the "Content Type" as a
1014 * parameter, which is a input for the DP HDCP2.2 encryption algo.
1016 * In case of Type 0 content protection request, kernel driver can choose
1017 * either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for
1018 * "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send
1019 * that content to a HDCP 1.4 authenticated HDCP sink (Type0 link).
1020 * But if the content is classified as "HDCP Type 1", above mentioned
1021 * HDCP 2.2 repeater wont send the content to the HDCP sink as it can't
1022 * authenticate the HDCP1.4 capable sink for "HDCP Type 1".
1024 * Please note userspace can be ignorant of the HDCP versions used by the
1025 * kernel driver to achieve the "HDCP Content Type".
1027 * At current scenario, classifying a content as Type 1 ensures that the
1028 * content will be displayed only through the HDCP2.2 encrypted link.
1030 * Note that the HDCP Content Type property is introduced at HDCP 2.2, and
1031 * defaults to type 0. It is only exposed by drivers supporting HDCP 2.2
1032 * (hence supporting Type 0 and Type 1). Based on how next versions of
1033 * HDCP specs are defined content Type could be used for higher versions
1036 * If content type is changed when "Content Protection" is not UNDESIRED,
1037 * then kernel will disable the HDCP and re-enable with new type in the
1038 * same atomic commit. And when "Content Protection" is ENABLED, it means
1039 * that link is HDCP authenticated and encrypted, for the transmission of
1040 * the Type of stream mentioned at "HDCP Content Type".
1042 * HDR_OUTPUT_METADATA:
1043 * Connector property to enable userspace to send HDR Metadata to
1044 * driver. This metadata is based on the composition and blending
1045 * policies decided by user, taking into account the hardware and
1046 * sink capabilities. The driver gets this metadata and creates a
1047 * Dynamic Range and Mastering Infoframe (DRM) in case of HDMI,
1048 * SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then
1049 * sent to sink. This notifies the sink of the upcoming frame's Color
1050 * Encoding and Luminance parameters.
1052 * Userspace first need to detect the HDR capabilities of sink by
1053 * reading and parsing the EDID. Details of HDR metadata for HDMI
1054 * are added in CTA 861.G spec. For DP , its defined in VESA DP
1055 * Standard v1.4. It needs to then get the metadata information
1056 * of the video/game/app content which are encoded in HDR (basically
1057 * using HDR transfer functions). With this information it needs to
1058 * decide on a blending policy and compose the relevant
1059 * layers/overlays into a common format. Once this blending is done,
1060 * userspace will be aware of the metadata of the composed frame to
1061 * be send to sink. It then uses this property to communicate this
1062 * metadata to driver which then make a Infoframe packet and sends
1063 * to sink based on the type of encoder connected.
1065 * Userspace will be responsible to do Tone mapping operation in case:
1066 * - Some layers are HDR and others are SDR
1067 * - HDR layers luminance is not same as sink
1069 * It will even need to do colorspace conversion and get all layers
1070 * to one common colorspace for blending. It can use either GL, Media
1071 * or display engine to get this done based on the capabilties of the
1072 * associated hardware.
1074 * Driver expects metadata to be put in &struct hdr_output_metadata
1075 * structure from userspace. This is received as blob and stored in
1076 * &drm_connector_state.hdr_output_metadata. It parses EDID and saves the
1077 * sink metadata in &struct hdr_sink_metadata, as
1078 * &drm_connector.hdr_sink_metadata. Driver uses
1079 * drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata,
1080 * hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of
1084 * This range property is used by userspace to limit the bit depth. When
1085 * used the driver would limit the bpc in accordance with the valid range
1086 * supported by the hardware and sink. Drivers to use the function
1087 * drm_connector_attach_max_bpc_property() to create and attach the
1088 * property to the connector during initialization.
1090 * Connectors also have one standardized atomic property:
1093 * Mode object ID of the &drm_crtc this connector should be connected to.
1095 * Connectors for LCD panels may also have one standardized property:
1097 * panel orientation:
1098 * On some devices the LCD panel is mounted in the casing in such a way
1099 * that the up/top side of the panel does not match with the top side of
1100 * the device. Userspace can use this property to check for this.
1101 * Note that input coordinates from touchscreens (input devices with
1102 * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
1103 * coordinates, so if userspace rotates the picture to adjust for
1104 * the orientation it must also apply the same transformation to the
1105 * touchscreen input coordinates. This property is initialized by calling
1106 * drm_connector_init_panel_orientation_property().
1109 * This property defines how a non-native mode is upscaled to the native
1110 * mode of an LCD panel:
1113 * No upscaling happens, scaling is left to the panel. Not all
1114 * drivers expose this mode.
1116 * The output is upscaled to the full resolution of the panel,
1117 * ignoring the aspect ratio.
1119 * No upscaling happens, the output is centered within the native
1120 * resolution the panel.
1122 * The output is upscaled to maximize either the width or height
1123 * while retaining the aspect ratio.
1125 * This property should be set up by calling
1126 * drm_connector_attach_scaling_mode_property(). Note that drivers
1127 * can also expose this property to external outputs, in which case they
1128 * must support "None", which should be the default (since external screens
1129 * have a built-in scaler).
1132 int drm_connector_create_standard_properties(struct drm_device *dev)
1134 struct drm_property *prop;
1136 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1137 DRM_MODE_PROP_IMMUTABLE,
1141 dev->mode_config.edid_property = prop;
1143 prop = drm_property_create_enum(dev, 0,
1144 "DPMS", drm_dpms_enum_list,
1145 ARRAY_SIZE(drm_dpms_enum_list));
1148 dev->mode_config.dpms_property = prop;
1150 prop = drm_property_create(dev,
1151 DRM_MODE_PROP_BLOB |
1152 DRM_MODE_PROP_IMMUTABLE,
1156 dev->mode_config.path_property = prop;
1158 prop = drm_property_create(dev,
1159 DRM_MODE_PROP_BLOB |
1160 DRM_MODE_PROP_IMMUTABLE,
1164 dev->mode_config.tile_property = prop;
1166 prop = drm_property_create_enum(dev, 0, "link-status",
1167 drm_link_status_enum_list,
1168 ARRAY_SIZE(drm_link_status_enum_list));
1171 dev->mode_config.link_status_property = prop;
1173 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
1176 dev->mode_config.non_desktop_property = prop;
1178 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
1179 "HDR_OUTPUT_METADATA", 0);
1182 dev->mode_config.hdr_output_metadata_property = prop;
1188 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1191 * Called by a driver the first time a DVI-I connector is made.
1193 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1195 struct drm_property *dvi_i_selector;
1196 struct drm_property *dvi_i_subconnector;
1198 if (dev->mode_config.dvi_i_select_subconnector_property)
1202 drm_property_create_enum(dev, 0,
1203 "select subconnector",
1204 drm_dvi_i_select_enum_list,
1205 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1206 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1208 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1210 drm_dvi_i_subconnector_enum_list,
1211 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1212 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1216 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1219 * DOC: HDMI connector properties
1221 * content type (HDMI specific):
1222 * Indicates content type setting to be used in HDMI infoframes to indicate
1223 * content type for the external device, so that it adjusts its display
1224 * settings accordingly.
1226 * The value of this property can be one of the following:
1229 * Content type is unknown
1231 * Content type is graphics
1233 * Content type is photo
1235 * Content type is cinema
1237 * Content type is game
1239 * Drivers can set up this property by calling
1240 * drm_connector_attach_content_type_property(). Decoding to
1241 * infoframe values is done through drm_hdmi_avi_infoframe_content_type().
1245 * drm_connector_attach_content_type_property - attach content-type property
1246 * @connector: connector to attach content type property on.
1248 * Called by a driver the first time a HDMI connector is made.
1250 int drm_connector_attach_content_type_property(struct drm_connector *connector)
1252 if (!drm_mode_create_content_type_property(connector->dev))
1253 drm_object_attach_property(&connector->base,
1254 connector->dev->mode_config.content_type_property,
1255 DRM_MODE_CONTENT_TYPE_NO_DATA);
1258 EXPORT_SYMBOL(drm_connector_attach_content_type_property);
1262 * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe
1263 * content type information, based
1264 * on correspondent DRM property.
1265 * @frame: HDMI AVI infoframe
1266 * @conn_state: DRM display connector state
1269 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1270 const struct drm_connector_state *conn_state)
1272 switch (conn_state->content_type) {
1273 case DRM_MODE_CONTENT_TYPE_GRAPHICS:
1274 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1276 case DRM_MODE_CONTENT_TYPE_CINEMA:
1277 frame->content_type = HDMI_CONTENT_TYPE_CINEMA;
1279 case DRM_MODE_CONTENT_TYPE_GAME:
1280 frame->content_type = HDMI_CONTENT_TYPE_GAME;
1282 case DRM_MODE_CONTENT_TYPE_PHOTO:
1283 frame->content_type = HDMI_CONTENT_TYPE_PHOTO;
1286 /* Graphics is the default(0) */
1287 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1290 frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA;
1292 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type);
1295 * drm_mode_attach_tv_margin_properties - attach TV connector margin properties
1296 * @connector: DRM connector
1298 * Called by a driver when it needs to attach TV margin props to a connector.
1299 * Typically used on SDTV and HDMI connectors.
1301 void drm_connector_attach_tv_margin_properties(struct drm_connector *connector)
1303 struct drm_device *dev = connector->dev;
1305 drm_object_attach_property(&connector->base,
1306 dev->mode_config.tv_left_margin_property,
1308 drm_object_attach_property(&connector->base,
1309 dev->mode_config.tv_right_margin_property,
1311 drm_object_attach_property(&connector->base,
1312 dev->mode_config.tv_top_margin_property,
1314 drm_object_attach_property(&connector->base,
1315 dev->mode_config.tv_bottom_margin_property,
1318 EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties);
1321 * drm_mode_create_tv_margin_properties - create TV connector margin properties
1324 * Called by a driver's HDMI connector initialization routine, this function
1325 * creates the TV margin properties for a given device. No need to call this
1326 * function for an SDTV connector, it's already called from
1327 * drm_mode_create_tv_properties().
1329 int drm_mode_create_tv_margin_properties(struct drm_device *dev)
1331 if (dev->mode_config.tv_left_margin_property)
1334 dev->mode_config.tv_left_margin_property =
1335 drm_property_create_range(dev, 0, "left margin", 0, 100);
1336 if (!dev->mode_config.tv_left_margin_property)
1339 dev->mode_config.tv_right_margin_property =
1340 drm_property_create_range(dev, 0, "right margin", 0, 100);
1341 if (!dev->mode_config.tv_right_margin_property)
1344 dev->mode_config.tv_top_margin_property =
1345 drm_property_create_range(dev, 0, "top margin", 0, 100);
1346 if (!dev->mode_config.tv_top_margin_property)
1349 dev->mode_config.tv_bottom_margin_property =
1350 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1351 if (!dev->mode_config.tv_bottom_margin_property)
1356 EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
1359 * drm_mode_create_tv_properties - create TV specific connector properties
1361 * @num_modes: number of different TV formats (modes) supported
1362 * @modes: array of pointers to strings containing name of each format
1364 * Called by a driver's TV initialization routine, this function creates
1365 * the TV specific connector properties for a given device. Caller is
1366 * responsible for allocating a list of format names and passing them to
1369 int drm_mode_create_tv_properties(struct drm_device *dev,
1370 unsigned int num_modes,
1371 const char * const modes[])
1373 struct drm_property *tv_selector;
1374 struct drm_property *tv_subconnector;
1377 if (dev->mode_config.tv_select_subconnector_property)
1381 * Basic connector properties
1383 tv_selector = drm_property_create_enum(dev, 0,
1384 "select subconnector",
1385 drm_tv_select_enum_list,
1386 ARRAY_SIZE(drm_tv_select_enum_list));
1390 dev->mode_config.tv_select_subconnector_property = tv_selector;
1393 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1395 drm_tv_subconnector_enum_list,
1396 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1397 if (!tv_subconnector)
1399 dev->mode_config.tv_subconnector_property = tv_subconnector;
1402 * Other, TV specific properties: margins & TV modes.
1404 if (drm_mode_create_tv_margin_properties(dev))
1407 dev->mode_config.tv_mode_property =
1408 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1410 if (!dev->mode_config.tv_mode_property)
1413 for (i = 0; i < num_modes; i++)
1414 drm_property_add_enum(dev->mode_config.tv_mode_property,
1417 dev->mode_config.tv_brightness_property =
1418 drm_property_create_range(dev, 0, "brightness", 0, 100);
1419 if (!dev->mode_config.tv_brightness_property)
1422 dev->mode_config.tv_contrast_property =
1423 drm_property_create_range(dev, 0, "contrast", 0, 100);
1424 if (!dev->mode_config.tv_contrast_property)
1427 dev->mode_config.tv_flicker_reduction_property =
1428 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1429 if (!dev->mode_config.tv_flicker_reduction_property)
1432 dev->mode_config.tv_overscan_property =
1433 drm_property_create_range(dev, 0, "overscan", 0, 100);
1434 if (!dev->mode_config.tv_overscan_property)
1437 dev->mode_config.tv_saturation_property =
1438 drm_property_create_range(dev, 0, "saturation", 0, 100);
1439 if (!dev->mode_config.tv_saturation_property)
1442 dev->mode_config.tv_hue_property =
1443 drm_property_create_range(dev, 0, "hue", 0, 100);
1444 if (!dev->mode_config.tv_hue_property)
1451 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1454 * drm_mode_create_scaling_mode_property - create scaling mode property
1457 * Called by a driver the first time it's needed, must be attached to desired
1460 * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1461 * instead to correctly assign &drm_connector_state.picture_aspect_ratio
1462 * in the atomic state.
1464 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1466 struct drm_property *scaling_mode;
1468 if (dev->mode_config.scaling_mode_property)
1472 drm_property_create_enum(dev, 0, "scaling mode",
1473 drm_scaling_mode_enum_list,
1474 ARRAY_SIZE(drm_scaling_mode_enum_list));
1476 dev->mode_config.scaling_mode_property = scaling_mode;
1480 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1483 * DOC: Variable refresh properties
1485 * Variable refresh rate capable displays can dynamically adjust their
1486 * refresh rate by extending the duration of their vertical front porch
1487 * until page flip or timeout occurs. This can reduce or remove stuttering
1488 * and latency in scenarios where the page flip does not align with the
1491 * An example scenario would be an application flipping at a constant rate
1492 * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank
1493 * interval and the same contents will be displayed twice. This can be
1494 * observed as stuttering for content with motion.
1496 * If variable refresh rate was active on a display that supported a
1497 * variable refresh range from 35Hz to 60Hz no stuttering would be observable
1498 * for the example scenario. The minimum supported variable refresh rate of
1499 * 35Hz is below the page flip frequency and the vertical front porch can
1500 * be extended until the page flip occurs. The vblank interval will be
1501 * directly aligned to the page flip rate.
1503 * Not all userspace content is suitable for use with variable refresh rate.
1504 * Large and frequent changes in vertical front porch duration may worsen
1505 * perceived stuttering for input sensitive applications.
1507 * Panel brightness will also vary with vertical front porch duration. Some
1508 * panels may have noticeable differences in brightness between the minimum
1509 * vertical front porch duration and the maximum vertical front porch duration.
1510 * Large and frequent changes in vertical front porch duration may produce
1511 * observable flickering for such panels.
1513 * Userspace control for variable refresh rate is supported via properties
1514 * on the &drm_connector and &drm_crtc objects.
1517 * Optional &drm_connector boolean property that drivers should attach
1518 * with drm_connector_attach_vrr_capable_property() on connectors that
1519 * could support variable refresh rates. Drivers should update the
1520 * property value by calling drm_connector_set_vrr_capable_property().
1522 * Absence of the property should indicate absence of support.
1525 * Default &drm_crtc boolean property that notifies the driver that the
1526 * content on the CRTC is suitable for variable refresh rate presentation.
1527 * The driver will take this property as a hint to enable variable
1528 * refresh rate support if the receiver supports it, ie. if the
1529 * "vrr_capable" property is true on the &drm_connector object. The
1530 * vertical front porch duration will be extended until page-flip or
1531 * timeout when enabled.
1533 * The minimum vertical front porch duration is defined as the vertical
1534 * front porch duration for the current mode.
1536 * The maximum vertical front porch duration is greater than or equal to
1537 * the minimum vertical front porch duration. The duration is derived
1538 * from the minimum supported variable refresh rate for the connector.
1540 * The driver may place further restrictions within these minimum
1541 * and maximum bounds.
1545 * drm_connector_attach_vrr_capable_property - creates the
1546 * vrr_capable property
1547 * @connector: connector to create the vrr_capable property on.
1549 * This is used by atomic drivers to add support for querying
1550 * variable refresh rate capability for a connector.
1553 * Zero on success, negative errono on failure.
1555 int drm_connector_attach_vrr_capable_property(
1556 struct drm_connector *connector)
1558 struct drm_device *dev = connector->dev;
1559 struct drm_property *prop;
1561 if (!connector->vrr_capable_property) {
1562 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE,
1567 connector->vrr_capable_property = prop;
1568 drm_object_attach_property(&connector->base, prop, 0);
1573 EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property);
1576 * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1577 * @connector: connector to attach scaling mode property on.
1578 * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1580 * This is used to add support for scaling mode to atomic drivers.
1581 * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
1582 * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1584 * This is the atomic version of drm_mode_create_scaling_mode_property().
1587 * Zero on success, negative errno on failure.
1589 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1590 u32 scaling_mode_mask)
1592 struct drm_device *dev = connector->dev;
1593 struct drm_property *scaling_mode_property;
1595 const unsigned valid_scaling_mode_mask =
1596 (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1598 if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
1599 scaling_mode_mask & ~valid_scaling_mode_mask))
1602 scaling_mode_property =
1603 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1604 hweight32(scaling_mode_mask));
1606 if (!scaling_mode_property)
1609 for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1612 if (!(BIT(i) & scaling_mode_mask))
1615 ret = drm_property_add_enum(scaling_mode_property,
1616 drm_scaling_mode_enum_list[i].type,
1617 drm_scaling_mode_enum_list[i].name);
1620 drm_property_destroy(dev, scaling_mode_property);
1626 drm_object_attach_property(&connector->base,
1627 scaling_mode_property, 0);
1629 connector->scaling_mode_property = scaling_mode_property;
1633 EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1636 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1639 * Called by a driver the first time it's needed, must be attached to desired
1643 * Zero on success, negative errno on failure.
1645 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1647 if (dev->mode_config.aspect_ratio_property)
1650 dev->mode_config.aspect_ratio_property =
1651 drm_property_create_enum(dev, 0, "aspect ratio",
1652 drm_aspect_ratio_enum_list,
1653 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1655 if (dev->mode_config.aspect_ratio_property == NULL)
1660 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1663 * DOC: standard connector properties
1666 * drm_mode_create_colorspace_property - create colorspace property
1667 * This property helps select a suitable colorspace based on the sink
1668 * capability. Modern sink devices support wider gamut like BT2020.
1669 * This helps switch to BT2020 mode if the BT2020 encoded video stream
1670 * is being played by the user, same for any other colorspace. Thereby
1671 * giving a good visual experience to users.
1673 * The expectation from userspace is that it should parse the EDID
1674 * and get supported colorspaces. Use this property and switch to the
1675 * one supported. Sink supported colorspaces should be retrieved by
1676 * userspace from EDID and driver will not explicitly expose them.
1678 * Basically the expectation from userspace is:
1679 * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
1681 * - Set this new property to let the sink know what it
1682 * converted the CRTC output to.
1683 * - This property is just to inform sink what colorspace
1684 * source is trying to drive.
1686 * Called by a driver the first time it's needed, must be attached to desired
1689 int drm_mode_create_colorspace_property(struct drm_connector *connector)
1691 struct drm_device *dev = connector->dev;
1692 struct drm_property *prop;
1694 if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
1695 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
1696 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
1699 ARRAY_SIZE(hdmi_colorspaces));
1703 DRM_DEBUG_KMS("Colorspace property not supported\n");
1707 connector->colorspace_property = prop;
1711 EXPORT_SYMBOL(drm_mode_create_colorspace_property);
1714 * drm_mode_create_content_type_property - create content type property
1717 * Called by a driver the first time it's needed, must be attached to desired
1721 * Zero on success, negative errno on failure.
1723 int drm_mode_create_content_type_property(struct drm_device *dev)
1725 if (dev->mode_config.content_type_property)
1728 dev->mode_config.content_type_property =
1729 drm_property_create_enum(dev, 0, "content type",
1730 drm_content_type_enum_list,
1731 ARRAY_SIZE(drm_content_type_enum_list));
1733 if (dev->mode_config.content_type_property == NULL)
1738 EXPORT_SYMBOL(drm_mode_create_content_type_property);
1741 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1744 * Create the the suggested x/y offset property for connectors.
1746 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1748 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1751 dev->mode_config.suggested_x_property =
1752 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1754 dev->mode_config.suggested_y_property =
1755 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1757 if (dev->mode_config.suggested_x_property == NULL ||
1758 dev->mode_config.suggested_y_property == NULL)
1762 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1765 * drm_connector_set_path_property - set tile property on connector
1766 * @connector: connector to set property on.
1767 * @path: path to use for property; must not be NULL.
1769 * This creates a property to expose to userspace to specify a
1770 * connector path. This is mainly used for DisplayPort MST where
1771 * connectors have a topology and we want to allow userspace to give
1772 * them more meaningful names.
1775 * Zero on success, negative errno on failure.
1777 int drm_connector_set_path_property(struct drm_connector *connector,
1780 struct drm_device *dev = connector->dev;
1783 ret = drm_property_replace_global_blob(dev,
1784 &connector->path_blob_ptr,
1788 dev->mode_config.path_property);
1791 EXPORT_SYMBOL(drm_connector_set_path_property);
1794 * drm_connector_set_tile_property - set tile property on connector
1795 * @connector: connector to set property on.
1797 * This looks up the tile information for a connector, and creates a
1798 * property for userspace to parse if it exists. The property is of
1799 * the form of 8 integers using ':' as a separator.
1800 * This is used for dual port tiled displays with DisplayPort SST
1801 * or DisplayPort MST connectors.
1804 * Zero on success, errno on failure.
1806 int drm_connector_set_tile_property(struct drm_connector *connector)
1808 struct drm_device *dev = connector->dev;
1812 if (!connector->has_tile) {
1813 ret = drm_property_replace_global_blob(dev,
1814 &connector->tile_blob_ptr,
1818 dev->mode_config.tile_property);
1822 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
1823 connector->tile_group->id, connector->tile_is_single_monitor,
1824 connector->num_h_tile, connector->num_v_tile,
1825 connector->tile_h_loc, connector->tile_v_loc,
1826 connector->tile_h_size, connector->tile_v_size);
1828 ret = drm_property_replace_global_blob(dev,
1829 &connector->tile_blob_ptr,
1833 dev->mode_config.tile_property);
1836 EXPORT_SYMBOL(drm_connector_set_tile_property);
1839 * drm_connector_update_edid_property - update the edid property of a connector
1840 * @connector: drm connector
1841 * @edid: new value of the edid property
1843 * This function creates a new blob modeset object and assigns its id to the
1844 * connector's edid property.
1845 * Since we also parse tile information from EDID's displayID block, we also
1846 * set the connector's tile property here. See drm_connector_set_tile_property()
1850 * Zero on success, negative errno on failure.
1852 int drm_connector_update_edid_property(struct drm_connector *connector,
1853 const struct edid *edid)
1855 struct drm_device *dev = connector->dev;
1859 /* ignore requests to set edid when overridden */
1860 if (connector->override_edid)
1864 size = EDID_LENGTH * (1 + edid->extensions);
1866 /* Set the display info, using edid if available, otherwise
1867 * reseting the values to defaults. This duplicates the work
1868 * done in drm_add_edid_modes, but that function is not
1869 * consistently called before this one in all drivers and the
1870 * computation is cheap enough that it seems better to
1871 * duplicate it rather than attempt to ensure some arbitrary
1872 * ordering of calls.
1875 drm_add_display_info(connector, edid);
1877 drm_reset_display_info(connector);
1879 drm_object_property_set_value(&connector->base,
1880 dev->mode_config.non_desktop_property,
1881 connector->display_info.non_desktop);
1883 ret = drm_property_replace_global_blob(dev,
1884 &connector->edid_blob_ptr,
1888 dev->mode_config.edid_property);
1891 return drm_connector_set_tile_property(connector);
1893 EXPORT_SYMBOL(drm_connector_update_edid_property);
1896 * drm_connector_set_link_status_property - Set link status property of a connector
1897 * @connector: drm connector
1898 * @link_status: new value of link status property (0: Good, 1: Bad)
1900 * In usual working scenario, this link status property will always be set to
1901 * "GOOD". If something fails during or after a mode set, the kernel driver
1902 * may set this link status property to "BAD". The caller then needs to send a
1903 * hotplug uevent for userspace to re-check the valid modes through
1904 * GET_CONNECTOR_IOCTL and retry modeset.
1906 * Note: Drivers cannot rely on userspace to support this property and
1907 * issue a modeset. As such, they may choose to handle issues (like
1908 * re-training a link) without userspace's intervention.
1910 * The reason for adding this property is to handle link training failures, but
1911 * it is not limited to DP or link training. For example, if we implement
1912 * asynchronous setcrtc, this property can be used to report any failures in that.
1914 void drm_connector_set_link_status_property(struct drm_connector *connector,
1915 uint64_t link_status)
1917 struct drm_device *dev = connector->dev;
1919 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1920 connector->state->link_status = link_status;
1921 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1923 EXPORT_SYMBOL(drm_connector_set_link_status_property);
1926 * drm_connector_attach_max_bpc_property - attach "max bpc" property
1927 * @connector: connector to attach max bpc property on.
1928 * @min: The minimum bit depth supported by the connector.
1929 * @max: The maximum bit depth supported by the connector.
1931 * This is used to add support for limiting the bit depth on a connector.
1934 * Zero on success, negative errno on failure.
1936 int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
1939 struct drm_device *dev = connector->dev;
1940 struct drm_property *prop;
1942 prop = connector->max_bpc_property;
1944 prop = drm_property_create_range(dev, 0, "max bpc", min, max);
1948 connector->max_bpc_property = prop;
1951 drm_object_attach_property(&connector->base, prop, max);
1952 connector->state->max_requested_bpc = max;
1953 connector->state->max_bpc = max;
1957 EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
1960 * drm_connector_set_vrr_capable_property - sets the variable refresh rate
1961 * capable property for a connector
1962 * @connector: drm connector
1963 * @capable: True if the connector is variable refresh rate capable
1965 * Should be used by atomic drivers to update the indicated support for
1966 * variable refresh rate over a connector.
1968 void drm_connector_set_vrr_capable_property(
1969 struct drm_connector *connector, bool capable)
1971 drm_object_property_set_value(&connector->base,
1972 connector->vrr_capable_property,
1975 EXPORT_SYMBOL(drm_connector_set_vrr_capable_property);
1978 * drm_connector_init_panel_orientation_property -
1979 * initialize the connecters panel_orientation property
1980 * @connector: connector for which to init the panel-orientation property.
1981 * @width: width in pixels of the panel, used for panel quirk detection
1982 * @height: height in pixels of the panel, used for panel quirk detection
1984 * This function should only be called for built-in panels, after setting
1985 * connector->display_info.panel_orientation first (if known).
1987 * This function will check for platform specific (e.g. DMI based) quirks
1988 * overriding display_info.panel_orientation first, then if panel_orientation
1989 * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the
1990 * "panel orientation" property to the connector.
1993 * Zero on success, negative errno on failure.
1995 int drm_connector_init_panel_orientation_property(
1996 struct drm_connector *connector, int width, int height)
1998 struct drm_device *dev = connector->dev;
1999 struct drm_display_info *info = &connector->display_info;
2000 struct drm_property *prop;
2001 int orientation_quirk;
2003 orientation_quirk = drm_get_panel_orientation_quirk(width, height);
2004 if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2005 info->panel_orientation = orientation_quirk;
2007 if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
2010 prop = dev->mode_config.panel_orientation_property;
2012 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
2013 "panel orientation",
2014 drm_panel_orientation_enum_list,
2015 ARRAY_SIZE(drm_panel_orientation_enum_list));
2019 dev->mode_config.panel_orientation_property = prop;
2022 drm_object_attach_property(&connector->base, prop,
2023 info->panel_orientation);
2026 EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
2028 int drm_connector_set_obj_prop(struct drm_mode_object *obj,
2029 struct drm_property *property,
2033 struct drm_connector *connector = obj_to_connector(obj);
2035 /* Do DPMS ourselves */
2036 if (property == connector->dev->mode_config.dpms_property) {
2037 ret = (*connector->funcs->dpms)(connector, (int)value);
2038 } else if (connector->funcs->set_property)
2039 ret = connector->funcs->set_property(connector, property, value);
2042 drm_object_property_set_value(&connector->base, property, value);
2046 int drm_connector_property_set_ioctl(struct drm_device *dev,
2047 void *data, struct drm_file *file_priv)
2049 struct drm_mode_connector_set_property *conn_set_prop = data;
2050 struct drm_mode_obj_set_property obj_set_prop = {
2051 .value = conn_set_prop->value,
2052 .prop_id = conn_set_prop->prop_id,
2053 .obj_id = conn_set_prop->connector_id,
2054 .obj_type = DRM_MODE_OBJECT_CONNECTOR
2057 /* It does all the locking and checking we need */
2058 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
2061 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
2063 /* For atomic drivers only state objects are synchronously updated and
2064 * protected by modeset locks, so check those first. */
2065 if (connector->state)
2066 return connector->state->best_encoder;
2067 return connector->encoder;
2071 drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
2072 const struct list_head *export_list,
2073 const struct drm_file *file_priv)
2076 * If user-space hasn't configured the driver to expose the stereo 3D
2077 * modes, don't expose them.
2079 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
2082 * If user-space hasn't configured the driver to expose the modes
2083 * with aspect-ratio, don't expose them. However if such a mode
2084 * is unique, let it be exposed, but reset the aspect-ratio flags
2085 * while preparing the list of user-modes.
2087 if (!file_priv->aspect_ratio_allowed) {
2088 struct drm_display_mode *mode_itr;
2090 list_for_each_entry(mode_itr, export_list, export_head)
2091 if (drm_mode_match(mode_itr, mode,
2092 DRM_MODE_MATCH_TIMINGS |
2093 DRM_MODE_MATCH_CLOCK |
2094 DRM_MODE_MATCH_FLAGS |
2095 DRM_MODE_MATCH_3D_FLAGS))
2102 int drm_mode_getconnector(struct drm_device *dev, void *data,
2103 struct drm_file *file_priv)
2105 struct drm_mode_get_connector *out_resp = data;
2106 struct drm_connector *connector;
2107 struct drm_encoder *encoder;
2108 struct drm_display_mode *mode;
2110 int encoders_count = 0;
2114 struct drm_mode_modeinfo u_mode;
2115 struct drm_mode_modeinfo __user *mode_ptr;
2116 uint32_t __user *encoder_ptr;
2117 LIST_HEAD(export_list);
2119 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2122 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2124 connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
2128 drm_connector_for_each_possible_encoder(connector, encoder, i)
2131 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2133 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2135 drm_connector_for_each_possible_encoder(connector, encoder, i) {
2136 if (put_user(encoder->base.id, encoder_ptr + copied)) {
2143 out_resp->count_encoders = encoders_count;
2145 out_resp->connector_id = connector->base.id;
2146 out_resp->connector_type = connector->connector_type;
2147 out_resp->connector_type_id = connector->connector_type_id;
2149 mutex_lock(&dev->mode_config.mutex);
2150 if (out_resp->count_modes == 0) {
2151 connector->funcs->fill_modes(connector,
2152 dev->mode_config.max_width,
2153 dev->mode_config.max_height);
2156 out_resp->mm_width = connector->display_info.width_mm;
2157 out_resp->mm_height = connector->display_info.height_mm;
2158 out_resp->subpixel = connector->display_info.subpixel_order;
2159 out_resp->connection = connector->status;
2161 /* delayed so we get modes regardless of pre-fill_modes state */
2162 list_for_each_entry(mode, &connector->modes, head)
2163 if (drm_mode_expose_to_userspace(mode, &export_list,
2165 list_add_tail(&mode->export_head, &export_list);
2170 * This ioctl is called twice, once to determine how much space is
2171 * needed, and the 2nd time to fill it.
2172 * The modes that need to be exposed to the user are maintained in the
2173 * 'export_list'. When the ioctl is called first time to determine the,
2174 * space, the export_list gets filled, to find the no.of modes. In the
2175 * 2nd time, the user modes are filled, one by one from the export_list.
2177 if ((out_resp->count_modes >= mode_count) && mode_count) {
2179 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2180 list_for_each_entry(mode, &export_list, export_head) {
2181 drm_mode_convert_to_umode(&u_mode, mode);
2183 * Reset aspect ratio flags of user-mode, if modes with
2184 * aspect-ratio are not supported.
2186 if (!file_priv->aspect_ratio_allowed)
2187 u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
2188 if (copy_to_user(mode_ptr + copied,
2189 &u_mode, sizeof(u_mode))) {
2191 mutex_unlock(&dev->mode_config.mutex);
2198 out_resp->count_modes = mode_count;
2199 mutex_unlock(&dev->mode_config.mutex);
2201 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2202 encoder = drm_connector_get_encoder(connector);
2204 out_resp->encoder_id = encoder->base.id;
2206 out_resp->encoder_id = 0;
2208 /* Only grab properties after probing, to make sure EDID and other
2209 * properties reflect the latest status. */
2210 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
2211 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2212 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2213 &out_resp->count_props);
2214 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2217 drm_connector_put(connector);
2226 * Tile groups are used to represent tiled monitors with a unique integer
2227 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
2228 * we store this in a tile group, so we have a common identifier for all tiles
2229 * in a monitor group. The property is called "TILE". Drivers can manage tile
2230 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
2231 * drm_mode_get_tile_group(). But this is only needed for internal panels where
2232 * the tile group information is exposed through a non-standard way.
2235 static void drm_tile_group_free(struct kref *kref)
2237 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
2238 struct drm_device *dev = tg->dev;
2239 mutex_lock(&dev->mode_config.idr_mutex);
2240 idr_remove(&dev->mode_config.tile_idr, tg->id);
2241 mutex_unlock(&dev->mode_config.idr_mutex);
2246 * drm_mode_put_tile_group - drop a reference to a tile group.
2248 * @tg: tile group to drop reference to.
2250 * drop reference to tile group and free if 0.
2252 void drm_mode_put_tile_group(struct drm_device *dev,
2253 struct drm_tile_group *tg)
2255 kref_put(&tg->refcount, drm_tile_group_free);
2257 EXPORT_SYMBOL(drm_mode_put_tile_group);
2260 * drm_mode_get_tile_group - get a reference to an existing tile group
2262 * @topology: 8-bytes unique per monitor.
2264 * Use the unique bytes to get a reference to an existing tile group.
2267 * tile group or NULL if not found.
2269 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
2272 struct drm_tile_group *tg;
2274 mutex_lock(&dev->mode_config.idr_mutex);
2275 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
2276 if (!memcmp(tg->group_data, topology, 8)) {
2277 if (!kref_get_unless_zero(&tg->refcount))
2279 mutex_unlock(&dev->mode_config.idr_mutex);
2283 mutex_unlock(&dev->mode_config.idr_mutex);
2286 EXPORT_SYMBOL(drm_mode_get_tile_group);
2289 * drm_mode_create_tile_group - create a tile group from a displayid description
2291 * @topology: 8-bytes unique per monitor.
2293 * Create a tile group for the unique monitor, and get a unique
2294 * identifier for the tile group.
2297 * new tile group or NULL.
2299 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
2302 struct drm_tile_group *tg;
2305 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
2309 kref_init(&tg->refcount);
2310 memcpy(tg->group_data, topology, 8);
2313 mutex_lock(&dev->mode_config.idr_mutex);
2314 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
2322 mutex_unlock(&dev->mode_config.idr_mutex);
2325 EXPORT_SYMBOL(drm_mode_create_tile_group);