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
24 #include <drm/drm_connector.h>
25 #include <drm/drm_edid.h>
26 #include <drm/drm_encoder.h>
27 #include <drm/drm_utils.h>
29 #include "drm_crtc_internal.h"
30 #include "drm_internal.h"
35 * In DRM connectors are the general abstraction for display sinks, and include
36 * als fixed panels or anything else that can display pixels in some form. As
37 * opposed to all other KMS objects representing hardware (like CRTC, encoder or
38 * plane abstractions) connectors can be hotplugged and unplugged at runtime.
39 * Hence they are reference-counted using drm_connector_get() and
40 * drm_connector_put().
42 * KMS driver must create, initialize, register and attach at a &struct
43 * drm_connector for each such sink. The instance is created as other KMS
44 * objects and initialized by setting the following fields. The connector is
45 * initialized with a call to drm_connector_init() with a pointer to the
46 * &struct drm_connector_funcs and a connector type, and then exposed to
47 * userspace with a call to drm_connector_register().
49 * Connectors must be attached to an encoder to be used. For devices that map
50 * connectors to encoders 1:1, the connector should be attached at
51 * initialization time with a call to drm_connector_attach_encoder(). The
52 * driver must also set the &drm_connector.encoder field to point to the
55 * For connectors which are not fixed (like built-in panels) the driver needs to
56 * support hotplug notifications. The simplest way to do that is by using the
57 * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
58 * hardware support for hotplug interrupts. Connectors with hardware hotplug
59 * support can instead use e.g. drm_helper_hpd_irq_event().
62 struct drm_conn_prop_enum_list {
69 * Connector and encoder types.
71 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
72 { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
73 { DRM_MODE_CONNECTOR_VGA, "VGA" },
74 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
75 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
76 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
77 { DRM_MODE_CONNECTOR_Composite, "Composite" },
78 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
79 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
80 { DRM_MODE_CONNECTOR_Component, "Component" },
81 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
82 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
83 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
84 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
85 { DRM_MODE_CONNECTOR_TV, "TV" },
86 { DRM_MODE_CONNECTOR_eDP, "eDP" },
87 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
88 { DRM_MODE_CONNECTOR_DSI, "DSI" },
89 { DRM_MODE_CONNECTOR_DPI, "DPI" },
90 { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" },
93 void drm_connector_ida_init(void)
97 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
98 ida_init(&drm_connector_enum_list[i].ida);
101 void drm_connector_ida_destroy(void)
105 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
106 ida_destroy(&drm_connector_enum_list[i].ida);
110 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
111 * @connector: connector to quwery
113 * The kernel supports per-connector configuration of its consoles through
114 * use of the video= parameter. This function parses that option and
115 * extracts the user's specified mode (or enable/disable status) for a
116 * particular connector. This is typically only used during the early fbdev
119 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
121 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
124 if (fb_get_options(connector->name, &option))
127 if (!drm_mode_parse_command_line_for_connector(option,
133 DRM_INFO("forcing %s connector %s\n", connector->name,
134 drm_get_connector_force_name(mode->force));
135 connector->force = mode->force;
138 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
140 mode->xres, mode->yres,
141 mode->refresh_specified ? mode->refresh : 60,
142 mode->rb ? " reduced blanking" : "",
143 mode->margins ? " with margins" : "",
144 mode->interlace ? " interlaced" : "");
147 static void drm_connector_free(struct kref *kref)
149 struct drm_connector *connector =
150 container_of(kref, struct drm_connector, base.refcount);
151 struct drm_device *dev = connector->dev;
153 drm_mode_object_unregister(dev, &connector->base);
154 connector->funcs->destroy(connector);
157 void drm_connector_free_work_fn(struct work_struct *work)
159 struct drm_connector *connector, *n;
160 struct drm_device *dev =
161 container_of(work, struct drm_device, mode_config.connector_free_work);
162 struct drm_mode_config *config = &dev->mode_config;
164 struct llist_node *freed;
166 spin_lock_irqsave(&config->connector_list_lock, flags);
167 freed = llist_del_all(&config->connector_free_list);
168 spin_unlock_irqrestore(&config->connector_list_lock, flags);
170 llist_for_each_entry_safe(connector, n, freed, free_node) {
171 drm_mode_object_unregister(dev, &connector->base);
172 connector->funcs->destroy(connector);
177 * drm_connector_init - Init a preallocated connector
179 * @connector: the connector to init
180 * @funcs: callbacks for this connector
181 * @connector_type: user visible type of the connector
183 * Initialises a preallocated connector. Connectors should be
184 * subclassed as part of driver connector objects.
187 * Zero on success, error code on failure.
189 int drm_connector_init(struct drm_device *dev,
190 struct drm_connector *connector,
191 const struct drm_connector_funcs *funcs,
194 struct drm_mode_config *config = &dev->mode_config;
196 struct ida *connector_ida =
197 &drm_connector_enum_list[connector_type].ida;
199 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
200 (!funcs->atomic_destroy_state ||
201 !funcs->atomic_duplicate_state));
203 ret = __drm_mode_object_add(dev, &connector->base,
204 DRM_MODE_OBJECT_CONNECTOR,
205 false, drm_connector_free);
209 connector->base.properties = &connector->properties;
210 connector->dev = dev;
211 connector->funcs = funcs;
213 /* connector index is used with 32bit bitmasks */
214 ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
216 DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
217 drm_connector_enum_list[connector_type].name,
221 connector->index = ret;
224 connector->connector_type = connector_type;
225 connector->connector_type_id =
226 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
227 if (connector->connector_type_id < 0) {
228 ret = connector->connector_type_id;
232 kasprintf(GFP_KERNEL, "%s-%d",
233 drm_connector_enum_list[connector_type].name,
234 connector->connector_type_id);
235 if (!connector->name) {
237 goto out_put_type_id;
240 INIT_LIST_HEAD(&connector->probed_modes);
241 INIT_LIST_HEAD(&connector->modes);
242 mutex_init(&connector->mutex);
243 connector->edid_blob_ptr = NULL;
244 connector->status = connector_status_unknown;
245 connector->display_info.panel_orientation =
246 DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
248 drm_connector_get_cmdline_mode(connector);
250 /* We should add connectors at the end to avoid upsetting the connector
252 spin_lock_irq(&config->connector_list_lock);
253 list_add_tail(&connector->head, &config->connector_list);
254 config->num_connector++;
255 spin_unlock_irq(&config->connector_list_lock);
257 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL &&
258 connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
259 drm_object_attach_property(&connector->base,
260 config->edid_property,
263 drm_object_attach_property(&connector->base,
264 config->dpms_property, 0);
266 drm_object_attach_property(&connector->base,
267 config->link_status_property,
270 drm_object_attach_property(&connector->base,
271 config->non_desktop_property,
274 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
275 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
278 connector->debugfs_entry = NULL;
281 ida_simple_remove(connector_ida, connector->connector_type_id);
284 ida_simple_remove(&config->connector_ida, connector->index);
287 drm_mode_object_unregister(dev, &connector->base);
291 EXPORT_SYMBOL(drm_connector_init);
294 * drm_connector_attach_encoder - attach a connector to an encoder
295 * @connector: connector to attach
296 * @encoder: encoder to attach @connector to
298 * This function links up a connector to an encoder. Note that the routing
299 * restrictions between encoders and crtcs are exposed to userspace through the
300 * possible_clones and possible_crtcs bitmasks.
303 * Zero on success, negative errno on failure.
305 int drm_connector_attach_encoder(struct drm_connector *connector,
306 struct drm_encoder *encoder)
311 * In the past, drivers have attempted to model the static association
312 * of connector to encoder in simple connector/encoder devices using a
313 * direct assignment of connector->encoder = encoder. This connection
314 * is a logical one and the responsibility of the core, so drivers are
315 * expected not to mess with this.
317 * Note that the error return should've been enough here, but a large
318 * majority of drivers ignores the return value, so add in a big WARN
319 * to get people's attention.
321 if (WARN_ON(connector->encoder))
324 for (i = 0; i < ARRAY_SIZE(connector->encoder_ids); i++) {
325 if (connector->encoder_ids[i] == 0) {
326 connector->encoder_ids[i] = encoder->base.id;
332 EXPORT_SYMBOL(drm_connector_attach_encoder);
335 * drm_connector_has_possible_encoder - check if the connector and encoder are assosicated with each other
336 * @connector: the connector
337 * @encoder: the encoder
340 * True if @encoder is one of the possible encoders for @connector.
342 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
343 struct drm_encoder *encoder)
345 struct drm_encoder *enc;
348 drm_connector_for_each_possible_encoder(connector, enc, i) {
355 EXPORT_SYMBOL(drm_connector_has_possible_encoder);
357 static void drm_mode_remove(struct drm_connector *connector,
358 struct drm_display_mode *mode)
360 list_del(&mode->head);
361 drm_mode_destroy(connector->dev, mode);
365 * drm_connector_cleanup - cleans up an initialised connector
366 * @connector: connector to cleanup
368 * Cleans up the connector but doesn't free the object.
370 void drm_connector_cleanup(struct drm_connector *connector)
372 struct drm_device *dev = connector->dev;
373 struct drm_display_mode *mode, *t;
375 /* The connector should have been removed from userspace long before
376 * it is finally destroyed.
378 if (WARN_ON(connector->registration_state ==
379 DRM_CONNECTOR_REGISTERED))
380 drm_connector_unregister(connector);
382 if (connector->tile_group) {
383 drm_mode_put_tile_group(dev, connector->tile_group);
384 connector->tile_group = NULL;
387 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
388 drm_mode_remove(connector, mode);
390 list_for_each_entry_safe(mode, t, &connector->modes, head)
391 drm_mode_remove(connector, mode);
393 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
394 connector->connector_type_id);
396 ida_simple_remove(&dev->mode_config.connector_ida,
399 kfree(connector->display_info.bus_formats);
400 drm_mode_object_unregister(dev, &connector->base);
401 kfree(connector->name);
402 connector->name = NULL;
403 spin_lock_irq(&dev->mode_config.connector_list_lock);
404 list_del(&connector->head);
405 dev->mode_config.num_connector--;
406 spin_unlock_irq(&dev->mode_config.connector_list_lock);
408 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
409 if (connector->state && connector->funcs->atomic_destroy_state)
410 connector->funcs->atomic_destroy_state(connector,
413 mutex_destroy(&connector->mutex);
415 memset(connector, 0, sizeof(*connector));
417 EXPORT_SYMBOL(drm_connector_cleanup);
420 * drm_connector_register - register a connector
421 * @connector: the connector to register
423 * Register userspace interfaces for a connector
426 * Zero on success, error code on failure.
428 int drm_connector_register(struct drm_connector *connector)
432 if (!connector->dev->registered)
435 mutex_lock(&connector->mutex);
436 if (connector->registration_state != DRM_CONNECTOR_INITIALIZING)
439 ret = drm_sysfs_connector_add(connector);
443 ret = drm_debugfs_connector_add(connector);
448 if (connector->funcs->late_register) {
449 ret = connector->funcs->late_register(connector);
454 drm_mode_object_register(connector->dev, &connector->base);
456 connector->registration_state = DRM_CONNECTOR_REGISTERED;
460 drm_debugfs_connector_remove(connector);
462 drm_sysfs_connector_remove(connector);
464 mutex_unlock(&connector->mutex);
467 EXPORT_SYMBOL(drm_connector_register);
470 * drm_connector_unregister - unregister a connector
471 * @connector: the connector to unregister
473 * Unregister userspace interfaces for a connector
475 void drm_connector_unregister(struct drm_connector *connector)
477 mutex_lock(&connector->mutex);
478 if (connector->registration_state != DRM_CONNECTOR_REGISTERED) {
479 mutex_unlock(&connector->mutex);
483 if (connector->funcs->early_unregister)
484 connector->funcs->early_unregister(connector);
486 drm_sysfs_connector_remove(connector);
487 drm_debugfs_connector_remove(connector);
489 connector->registration_state = DRM_CONNECTOR_UNREGISTERED;
490 mutex_unlock(&connector->mutex);
492 EXPORT_SYMBOL(drm_connector_unregister);
494 void drm_connector_unregister_all(struct drm_device *dev)
496 struct drm_connector *connector;
497 struct drm_connector_list_iter conn_iter;
499 drm_connector_list_iter_begin(dev, &conn_iter);
500 drm_for_each_connector_iter(connector, &conn_iter)
501 drm_connector_unregister(connector);
502 drm_connector_list_iter_end(&conn_iter);
505 int drm_connector_register_all(struct drm_device *dev)
507 struct drm_connector *connector;
508 struct drm_connector_list_iter conn_iter;
511 drm_connector_list_iter_begin(dev, &conn_iter);
512 drm_for_each_connector_iter(connector, &conn_iter) {
513 ret = drm_connector_register(connector);
517 drm_connector_list_iter_end(&conn_iter);
520 drm_connector_unregister_all(dev);
525 * drm_get_connector_status_name - return a string for connector status
526 * @status: connector status to compute name of
528 * In contrast to the other drm_get_*_name functions this one here returns a
529 * const pointer and hence is threadsafe.
531 const char *drm_get_connector_status_name(enum drm_connector_status status)
533 if (status == connector_status_connected)
535 else if (status == connector_status_disconnected)
536 return "disconnected";
540 EXPORT_SYMBOL(drm_get_connector_status_name);
543 * drm_get_connector_force_name - return a string for connector force
544 * @force: connector force to get name of
546 * Returns: const pointer to name.
548 const char *drm_get_connector_force_name(enum drm_connector_force force)
551 case DRM_FORCE_UNSPECIFIED:
552 return "unspecified";
557 case DRM_FORCE_ON_DIGITAL:
564 #ifdef CONFIG_LOCKDEP
565 static struct lockdep_map connector_list_iter_dep_map = {
566 .name = "drm_connector_list_iter"
571 * drm_connector_list_iter_begin - initialize a connector_list iterator
573 * @iter: connector_list iterator
575 * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
576 * must always be cleaned up again by calling drm_connector_list_iter_end().
577 * Iteration itself happens using drm_connector_list_iter_next() or
578 * drm_for_each_connector_iter().
580 void drm_connector_list_iter_begin(struct drm_device *dev,
581 struct drm_connector_list_iter *iter)
585 lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
587 EXPORT_SYMBOL(drm_connector_list_iter_begin);
590 * Extra-safe connector put function that works in any context. Should only be
591 * used from the connector_iter functions, where we never really expect to
592 * actually release the connector when dropping our final reference.
595 __drm_connector_put_safe(struct drm_connector *conn)
597 struct drm_mode_config *config = &conn->dev->mode_config;
599 lockdep_assert_held(&config->connector_list_lock);
601 if (!refcount_dec_and_test(&conn->base.refcount.refcount))
604 llist_add(&conn->free_node, &config->connector_free_list);
605 schedule_work(&config->connector_free_work);
609 * drm_connector_list_iter_next - return next connector
610 * @iter: connector_list iterator
612 * Returns the next connector for @iter, or NULL when the list walk has
615 struct drm_connector *
616 drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
618 struct drm_connector *old_conn = iter->conn;
619 struct drm_mode_config *config = &iter->dev->mode_config;
620 struct list_head *lhead;
623 spin_lock_irqsave(&config->connector_list_lock, flags);
624 lhead = old_conn ? &old_conn->head : &config->connector_list;
627 if (lhead->next == &config->connector_list) {
633 iter->conn = list_entry(lhead, struct drm_connector, head);
635 /* loop until it's not a zombie connector */
636 } while (!kref_get_unless_zero(&iter->conn->base.refcount));
639 __drm_connector_put_safe(old_conn);
640 spin_unlock_irqrestore(&config->connector_list_lock, flags);
644 EXPORT_SYMBOL(drm_connector_list_iter_next);
647 * drm_connector_list_iter_end - tear down a connector_list iterator
648 * @iter: connector_list iterator
650 * Tears down @iter and releases any resources (like &drm_connector references)
651 * acquired while walking the list. This must always be called, both when the
652 * iteration completes fully or when it was aborted without walking the entire
655 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
657 struct drm_mode_config *config = &iter->dev->mode_config;
662 spin_lock_irqsave(&config->connector_list_lock, flags);
663 __drm_connector_put_safe(iter->conn);
664 spin_unlock_irqrestore(&config->connector_list_lock, flags);
666 lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
668 EXPORT_SYMBOL(drm_connector_list_iter_end);
670 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
671 { SubPixelUnknown, "Unknown" },
672 { SubPixelHorizontalRGB, "Horizontal RGB" },
673 { SubPixelHorizontalBGR, "Horizontal BGR" },
674 { SubPixelVerticalRGB, "Vertical RGB" },
675 { SubPixelVerticalBGR, "Vertical BGR" },
676 { SubPixelNone, "None" },
680 * drm_get_subpixel_order_name - return a string for a given subpixel enum
681 * @order: enum of subpixel_order
683 * Note you could abuse this and return something out of bounds, but that
684 * would be a caller error. No unscrubbed user data should make it here.
686 const char *drm_get_subpixel_order_name(enum subpixel_order order)
688 return drm_subpixel_enum_list[order].name;
690 EXPORT_SYMBOL(drm_get_subpixel_order_name);
692 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
693 { DRM_MODE_DPMS_ON, "On" },
694 { DRM_MODE_DPMS_STANDBY, "Standby" },
695 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
696 { DRM_MODE_DPMS_OFF, "Off" }
698 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
700 static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
701 { DRM_MODE_LINK_STATUS_GOOD, "Good" },
702 { DRM_MODE_LINK_STATUS_BAD, "Bad" },
706 * drm_display_info_set_bus_formats - set the supported bus formats
707 * @info: display info to store bus formats in
708 * @formats: array containing the supported bus formats
709 * @num_formats: the number of entries in the fmts array
711 * Store the supported bus formats in display info structure.
712 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
713 * a full list of available formats.
715 int drm_display_info_set_bus_formats(struct drm_display_info *info,
717 unsigned int num_formats)
721 if (!formats && num_formats)
724 if (formats && num_formats) {
725 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
731 kfree(info->bus_formats);
732 info->bus_formats = fmts;
733 info->num_bus_formats = num_formats;
737 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
739 /* Optional connector properties. */
740 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
741 { DRM_MODE_SCALE_NONE, "None" },
742 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
743 { DRM_MODE_SCALE_CENTER, "Center" },
744 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
747 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
748 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
749 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
750 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
753 static const struct drm_prop_enum_list drm_content_type_enum_list[] = {
754 { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" },
755 { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" },
756 { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" },
757 { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" },
758 { DRM_MODE_CONTENT_TYPE_GAME, "Game" },
761 static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
762 { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
763 { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
764 { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
765 { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
768 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
769 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
770 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
771 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
773 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
775 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
776 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
777 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
778 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
780 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
781 drm_dvi_i_subconnector_enum_list)
783 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
784 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
785 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
786 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
787 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
788 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
790 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
792 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
793 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
794 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
795 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
796 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
797 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
799 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
800 drm_tv_subconnector_enum_list)
802 static struct drm_prop_enum_list drm_cp_enum_list[] = {
803 { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" },
804 { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" },
805 { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" },
807 DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
810 * DOC: standard connector properties
812 * DRM connectors have a few standardized properties:
815 * Blob property which contains the current EDID read from the sink. This
816 * is useful to parse sink identification information like vendor, model
817 * and serial. Drivers should update this property by calling
818 * drm_connector_update_edid_property(), usually after having parsed
819 * the EDID using drm_add_edid_modes(). Userspace cannot change this
822 * Legacy property for setting the power state of the connector. For atomic
823 * drivers this is only provided for backwards compatibility with existing
824 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
825 * connector is linked to. Drivers should never set this property directly,
826 * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
827 * callback. For atomic drivers the remapping to the "ACTIVE" property is
828 * implemented in the DRM core. This is the only standard connector
829 * property that userspace can change.
831 * Note that this property cannot be set through the MODE_ATOMIC ioctl,
832 * userspace must use "ACTIVE" on the CRTC instead.
836 * For userspace also running on legacy drivers the "DPMS" semantics are a
837 * lot more complicated. First, userspace cannot rely on the "DPMS" value
838 * returned by the GETCONNECTOR actually reflecting reality, because many
839 * drivers fail to update it. For atomic drivers this is taken care of in
840 * drm_atomic_helper_update_legacy_modeset_state().
842 * The second issue is that the DPMS state is only well-defined when the
843 * connector is connected to a CRTC. In atomic the DRM core enforces that
844 * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
846 * Finally, when enabling an output using the legacy SETCONFIG ioctl then
847 * "DPMS" is forced to ON. But see above, that might not be reflected in
848 * the software value on legacy drivers.
850 * Summarizing: Only set "DPMS" when the connector is known to be enabled,
851 * assume that a successful SETCONFIG call also sets "DPMS" to on, and
852 * never read back the value of "DPMS" because it can be incorrect.
854 * Connector path property to identify how this sink is physically
855 * connected. Used by DP MST. This should be set by calling
856 * drm_connector_set_path_property(), in the case of DP MST with the
857 * path property the MST manager created. Userspace cannot change this
860 * Connector tile group property to indicate how a set of DRM connector
861 * compose together into one logical screen. This is used by both high-res
862 * external screens (often only using a single cable, but exposing multiple
863 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
864 * are not gen-locked. Note that for tiled panels which are genlocked, like
865 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
866 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
867 * should update this value using drm_connector_set_tile_property().
868 * Userspace cannot change this property.
870 * Connector link-status property to indicate the status of link. The
871 * default value of link-status is "GOOD". If something fails during or
872 * after modeset, the kernel driver may set this to "BAD" and issue a
873 * hotplug uevent. Drivers should update this value using
874 * drm_connector_set_link_status_property().
876 * Indicates the output should be ignored for purposes of displaying a
877 * standard desktop environment or console. This is most likely because
878 * the output device is not rectilinear.
879 * Content Protection:
880 * This property is used by userspace to request the kernel protect future
881 * content communicated over the link. When requested, kernel will apply
882 * the appropriate means of protection (most often HDCP), and use the
883 * property to tell userspace the protection is active.
885 * Drivers can set this up by calling
886 * drm_connector_attach_content_protection_property() on initialization.
888 * The value of this property can be one of the following:
890 * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
891 * The link is not protected, content is transmitted in the clear.
892 * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
893 * Userspace has requested content protection, but the link is not
894 * currently protected. When in this state, kernel should enable
895 * Content Protection as soon as possible.
896 * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
897 * Userspace has requested content protection, and the link is
898 * protected. Only the driver can set the property to this value.
899 * If userspace attempts to set to ENABLED, kernel will return
904 * - DESIRED state should be preserved until userspace de-asserts it by
905 * setting the property to UNDESIRED. This means ENABLED should only
906 * transition to UNDESIRED when the user explicitly requests it.
907 * - If the state is DESIRED, kernel should attempt to re-authenticate the
908 * link whenever possible. This includes across disable/enable, dpms,
909 * hotplug, downstream device changes, link status failures, etc..
910 * - Userspace is responsible for polling the property to determine when
911 * the value transitions from ENABLED to DESIRED. This signifies the link
912 * is no longer protected and userspace should take appropriate action
913 * (whatever that might be).
915 * Connectors also have one standardized atomic property:
918 * Mode object ID of the &drm_crtc this connector should be connected to.
920 * Connectors for LCD panels may also have one standardized property:
923 * On some devices the LCD panel is mounted in the casing in such a way
924 * that the up/top side of the panel does not match with the top side of
925 * the device. Userspace can use this property to check for this.
926 * Note that input coordinates from touchscreens (input devices with
927 * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
928 * coordinates, so if userspace rotates the picture to adjust for
929 * the orientation it must also apply the same transformation to the
930 * touchscreen input coordinates. This property is initialized by calling
931 * drm_connector_init_panel_orientation_property().
934 * This property defines how a non-native mode is upscaled to the native
935 * mode of an LCD panel:
938 * No upscaling happens, scaling is left to the panel. Not all
939 * drivers expose this mode.
941 * The output is upscaled to the full resolution of the panel,
942 * ignoring the aspect ratio.
944 * No upscaling happens, the output is centered within the native
945 * resolution the panel.
947 * The output is upscaled to maximize either the width or height
948 * while retaining the aspect ratio.
950 * This property should be set up by calling
951 * drm_connector_attach_scaling_mode_property(). Note that drivers
952 * can also expose this property to external outputs, in which case they
953 * must support "None", which should be the default (since external screens
954 * have a built-in scaler).
957 int drm_connector_create_standard_properties(struct drm_device *dev)
959 struct drm_property *prop;
961 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
962 DRM_MODE_PROP_IMMUTABLE,
966 dev->mode_config.edid_property = prop;
968 prop = drm_property_create_enum(dev, 0,
969 "DPMS", drm_dpms_enum_list,
970 ARRAY_SIZE(drm_dpms_enum_list));
973 dev->mode_config.dpms_property = prop;
975 prop = drm_property_create(dev,
977 DRM_MODE_PROP_IMMUTABLE,
981 dev->mode_config.path_property = prop;
983 prop = drm_property_create(dev,
985 DRM_MODE_PROP_IMMUTABLE,
989 dev->mode_config.tile_property = prop;
991 prop = drm_property_create_enum(dev, 0, "link-status",
992 drm_link_status_enum_list,
993 ARRAY_SIZE(drm_link_status_enum_list));
996 dev->mode_config.link_status_property = prop;
998 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
1001 dev->mode_config.non_desktop_property = prop;
1007 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1010 * Called by a driver the first time a DVI-I connector is made.
1012 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1014 struct drm_property *dvi_i_selector;
1015 struct drm_property *dvi_i_subconnector;
1017 if (dev->mode_config.dvi_i_select_subconnector_property)
1021 drm_property_create_enum(dev, 0,
1022 "select subconnector",
1023 drm_dvi_i_select_enum_list,
1024 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1025 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1027 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1029 drm_dvi_i_subconnector_enum_list,
1030 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1031 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1035 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1038 * DOC: HDMI connector properties
1040 * content type (HDMI specific):
1041 * Indicates content type setting to be used in HDMI infoframes to indicate
1042 * content type for the external device, so that it adjusts it's display
1043 * settings accordingly.
1045 * The value of this property can be one of the following:
1048 * Content type is unknown
1050 * Content type is graphics
1052 * Content type is photo
1054 * Content type is cinema
1056 * Content type is game
1058 * Drivers can set up this property by calling
1059 * drm_connector_attach_content_type_property(). Decoding to
1060 * infoframe values is done through drm_hdmi_avi_infoframe_content_type().
1064 * drm_connector_attach_content_type_property - attach content-type property
1065 * @connector: connector to attach content type property on.
1067 * Called by a driver the first time a HDMI connector is made.
1069 int drm_connector_attach_content_type_property(struct drm_connector *connector)
1071 if (!drm_mode_create_content_type_property(connector->dev))
1072 drm_object_attach_property(&connector->base,
1073 connector->dev->mode_config.content_type_property,
1074 DRM_MODE_CONTENT_TYPE_NO_DATA);
1077 EXPORT_SYMBOL(drm_connector_attach_content_type_property);
1081 * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe
1082 * content type information, based
1083 * on correspondent DRM property.
1084 * @frame: HDMI AVI infoframe
1085 * @conn_state: DRM display connector state
1088 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1089 const struct drm_connector_state *conn_state)
1091 switch (conn_state->content_type) {
1092 case DRM_MODE_CONTENT_TYPE_GRAPHICS:
1093 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1095 case DRM_MODE_CONTENT_TYPE_CINEMA:
1096 frame->content_type = HDMI_CONTENT_TYPE_CINEMA;
1098 case DRM_MODE_CONTENT_TYPE_GAME:
1099 frame->content_type = HDMI_CONTENT_TYPE_GAME;
1101 case DRM_MODE_CONTENT_TYPE_PHOTO:
1102 frame->content_type = HDMI_CONTENT_TYPE_PHOTO;
1105 /* Graphics is the default(0) */
1106 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
1109 frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA;
1111 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type);
1114 * drm_create_tv_properties - create TV specific connector properties
1116 * @num_modes: number of different TV formats (modes) supported
1117 * @modes: array of pointers to strings containing name of each format
1119 * Called by a driver's TV initialization routine, this function creates
1120 * the TV specific connector properties for a given device. Caller is
1121 * responsible for allocating a list of format names and passing them to
1124 int drm_mode_create_tv_properties(struct drm_device *dev,
1125 unsigned int num_modes,
1126 const char * const modes[])
1128 struct drm_property *tv_selector;
1129 struct drm_property *tv_subconnector;
1132 if (dev->mode_config.tv_select_subconnector_property)
1136 * Basic connector properties
1138 tv_selector = drm_property_create_enum(dev, 0,
1139 "select subconnector",
1140 drm_tv_select_enum_list,
1141 ARRAY_SIZE(drm_tv_select_enum_list));
1145 dev->mode_config.tv_select_subconnector_property = tv_selector;
1148 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1150 drm_tv_subconnector_enum_list,
1151 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1152 if (!tv_subconnector)
1154 dev->mode_config.tv_subconnector_property = tv_subconnector;
1157 * Other, TV specific properties: margins & TV modes.
1159 dev->mode_config.tv_left_margin_property =
1160 drm_property_create_range(dev, 0, "left margin", 0, 100);
1161 if (!dev->mode_config.tv_left_margin_property)
1164 dev->mode_config.tv_right_margin_property =
1165 drm_property_create_range(dev, 0, "right margin", 0, 100);
1166 if (!dev->mode_config.tv_right_margin_property)
1169 dev->mode_config.tv_top_margin_property =
1170 drm_property_create_range(dev, 0, "top margin", 0, 100);
1171 if (!dev->mode_config.tv_top_margin_property)
1174 dev->mode_config.tv_bottom_margin_property =
1175 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1176 if (!dev->mode_config.tv_bottom_margin_property)
1179 dev->mode_config.tv_mode_property =
1180 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1182 if (!dev->mode_config.tv_mode_property)
1185 for (i = 0; i < num_modes; i++)
1186 drm_property_add_enum(dev->mode_config.tv_mode_property,
1189 dev->mode_config.tv_brightness_property =
1190 drm_property_create_range(dev, 0, "brightness", 0, 100);
1191 if (!dev->mode_config.tv_brightness_property)
1194 dev->mode_config.tv_contrast_property =
1195 drm_property_create_range(dev, 0, "contrast", 0, 100);
1196 if (!dev->mode_config.tv_contrast_property)
1199 dev->mode_config.tv_flicker_reduction_property =
1200 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1201 if (!dev->mode_config.tv_flicker_reduction_property)
1204 dev->mode_config.tv_overscan_property =
1205 drm_property_create_range(dev, 0, "overscan", 0, 100);
1206 if (!dev->mode_config.tv_overscan_property)
1209 dev->mode_config.tv_saturation_property =
1210 drm_property_create_range(dev, 0, "saturation", 0, 100);
1211 if (!dev->mode_config.tv_saturation_property)
1214 dev->mode_config.tv_hue_property =
1215 drm_property_create_range(dev, 0, "hue", 0, 100);
1216 if (!dev->mode_config.tv_hue_property)
1223 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1226 * drm_mode_create_scaling_mode_property - create scaling mode property
1229 * Called by a driver the first time it's needed, must be attached to desired
1232 * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1233 * instead to correctly assign &drm_connector_state.picture_aspect_ratio
1234 * in the atomic state.
1236 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1238 struct drm_property *scaling_mode;
1240 if (dev->mode_config.scaling_mode_property)
1244 drm_property_create_enum(dev, 0, "scaling mode",
1245 drm_scaling_mode_enum_list,
1246 ARRAY_SIZE(drm_scaling_mode_enum_list));
1248 dev->mode_config.scaling_mode_property = scaling_mode;
1252 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1255 * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1256 * @connector: connector to attach scaling mode property on.
1257 * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1259 * This is used to add support for scaling mode to atomic drivers.
1260 * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
1261 * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1263 * This is the atomic version of drm_mode_create_scaling_mode_property().
1266 * Zero on success, negative errno on failure.
1268 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1269 u32 scaling_mode_mask)
1271 struct drm_device *dev = connector->dev;
1272 struct drm_property *scaling_mode_property;
1274 const unsigned valid_scaling_mode_mask =
1275 (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1277 if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
1278 scaling_mode_mask & ~valid_scaling_mode_mask))
1281 scaling_mode_property =
1282 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1283 hweight32(scaling_mode_mask));
1285 if (!scaling_mode_property)
1288 for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1291 if (!(BIT(i) & scaling_mode_mask))
1294 ret = drm_property_add_enum(scaling_mode_property,
1295 drm_scaling_mode_enum_list[i].type,
1296 drm_scaling_mode_enum_list[i].name);
1299 drm_property_destroy(dev, scaling_mode_property);
1305 drm_object_attach_property(&connector->base,
1306 scaling_mode_property, 0);
1308 connector->scaling_mode_property = scaling_mode_property;
1312 EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1315 * drm_connector_attach_content_protection_property - attach content protection
1318 * @connector: connector to attach CP property on.
1320 * This is used to add support for content protection on select connectors.
1321 * Content Protection is intentionally vague to allow for different underlying
1322 * technologies, however it is most implemented by HDCP.
1324 * The content protection will be set to &drm_connector_state.content_protection
1327 * Zero on success, negative errno on failure.
1329 int drm_connector_attach_content_protection_property(
1330 struct drm_connector *connector)
1332 struct drm_device *dev = connector->dev;
1333 struct drm_property *prop;
1335 prop = drm_property_create_enum(dev, 0, "Content Protection",
1337 ARRAY_SIZE(drm_cp_enum_list));
1341 drm_object_attach_property(&connector->base, prop,
1342 DRM_MODE_CONTENT_PROTECTION_UNDESIRED);
1344 connector->content_protection_property = prop;
1348 EXPORT_SYMBOL(drm_connector_attach_content_protection_property);
1351 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1354 * Called by a driver the first time it's needed, must be attached to desired
1358 * Zero on success, negative errno on failure.
1360 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1362 if (dev->mode_config.aspect_ratio_property)
1365 dev->mode_config.aspect_ratio_property =
1366 drm_property_create_enum(dev, 0, "aspect ratio",
1367 drm_aspect_ratio_enum_list,
1368 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1370 if (dev->mode_config.aspect_ratio_property == NULL)
1375 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1378 * drm_mode_create_content_type_property - create content type property
1381 * Called by a driver the first time it's needed, must be attached to desired
1385 * Zero on success, negative errno on failure.
1387 int drm_mode_create_content_type_property(struct drm_device *dev)
1389 if (dev->mode_config.content_type_property)
1392 dev->mode_config.content_type_property =
1393 drm_property_create_enum(dev, 0, "content type",
1394 drm_content_type_enum_list,
1395 ARRAY_SIZE(drm_content_type_enum_list));
1397 if (dev->mode_config.content_type_property == NULL)
1402 EXPORT_SYMBOL(drm_mode_create_content_type_property);
1405 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1408 * Create the the suggested x/y offset property for connectors.
1410 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1412 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1415 dev->mode_config.suggested_x_property =
1416 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1418 dev->mode_config.suggested_y_property =
1419 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1421 if (dev->mode_config.suggested_x_property == NULL ||
1422 dev->mode_config.suggested_y_property == NULL)
1426 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1429 * drm_connector_set_path_property - set tile property on connector
1430 * @connector: connector to set property on.
1431 * @path: path to use for property; must not be NULL.
1433 * This creates a property to expose to userspace to specify a
1434 * connector path. This is mainly used for DisplayPort MST where
1435 * connectors have a topology and we want to allow userspace to give
1436 * them more meaningful names.
1439 * Zero on success, negative errno on failure.
1441 int drm_connector_set_path_property(struct drm_connector *connector,
1444 struct drm_device *dev = connector->dev;
1447 ret = drm_property_replace_global_blob(dev,
1448 &connector->path_blob_ptr,
1452 dev->mode_config.path_property);
1455 EXPORT_SYMBOL(drm_connector_set_path_property);
1458 * drm_connector_set_tile_property - set tile property on connector
1459 * @connector: connector to set property on.
1461 * This looks up the tile information for a connector, and creates a
1462 * property for userspace to parse if it exists. The property is of
1463 * the form of 8 integers using ':' as a separator.
1466 * Zero on success, errno on failure.
1468 int drm_connector_set_tile_property(struct drm_connector *connector)
1470 struct drm_device *dev = connector->dev;
1474 if (!connector->has_tile) {
1475 ret = drm_property_replace_global_blob(dev,
1476 &connector->tile_blob_ptr,
1480 dev->mode_config.tile_property);
1484 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
1485 connector->tile_group->id, connector->tile_is_single_monitor,
1486 connector->num_h_tile, connector->num_v_tile,
1487 connector->tile_h_loc, connector->tile_v_loc,
1488 connector->tile_h_size, connector->tile_v_size);
1490 ret = drm_property_replace_global_blob(dev,
1491 &connector->tile_blob_ptr,
1495 dev->mode_config.tile_property);
1498 EXPORT_SYMBOL(drm_connector_set_tile_property);
1501 * drm_connector_update_edid_property - update the edid property of a connector
1502 * @connector: drm connector
1503 * @edid: new value of the edid property
1505 * This function creates a new blob modeset object and assigns its id to the
1506 * connector's edid property.
1509 * Zero on success, negative errno on failure.
1511 int drm_connector_update_edid_property(struct drm_connector *connector,
1512 const struct edid *edid)
1514 struct drm_device *dev = connector->dev;
1518 /* ignore requests to set edid when overridden */
1519 if (connector->override_edid)
1523 size = EDID_LENGTH * (1 + edid->extensions);
1525 /* Set the display info, using edid if available, otherwise
1526 * reseting the values to defaults. This duplicates the work
1527 * done in drm_add_edid_modes, but that function is not
1528 * consistently called before this one in all drivers and the
1529 * computation is cheap enough that it seems better to
1530 * duplicate it rather than attempt to ensure some arbitrary
1531 * ordering of calls.
1534 drm_add_display_info(connector, edid);
1536 drm_reset_display_info(connector);
1538 drm_object_property_set_value(&connector->base,
1539 dev->mode_config.non_desktop_property,
1540 connector->display_info.non_desktop);
1542 ret = drm_property_replace_global_blob(dev,
1543 &connector->edid_blob_ptr,
1547 dev->mode_config.edid_property);
1550 EXPORT_SYMBOL(drm_connector_update_edid_property);
1553 * drm_connector_set_link_status_property - Set link status property of a connector
1554 * @connector: drm connector
1555 * @link_status: new value of link status property (0: Good, 1: Bad)
1557 * In usual working scenario, this link status property will always be set to
1558 * "GOOD". If something fails during or after a mode set, the kernel driver
1559 * may set this link status property to "BAD". The caller then needs to send a
1560 * hotplug uevent for userspace to re-check the valid modes through
1561 * GET_CONNECTOR_IOCTL and retry modeset.
1563 * Note: Drivers cannot rely on userspace to support this property and
1564 * issue a modeset. As such, they may choose to handle issues (like
1565 * re-training a link) without userspace's intervention.
1567 * The reason for adding this property is to handle link training failures, but
1568 * it is not limited to DP or link training. For example, if we implement
1569 * asynchronous setcrtc, this property can be used to report any failures in that.
1571 void drm_connector_set_link_status_property(struct drm_connector *connector,
1572 uint64_t link_status)
1574 struct drm_device *dev = connector->dev;
1576 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1577 connector->state->link_status = link_status;
1578 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1580 EXPORT_SYMBOL(drm_connector_set_link_status_property);
1583 * drm_connector_init_panel_orientation_property -
1584 * initialize the connecters panel_orientation property
1585 * @connector: connector for which to init the panel-orientation property.
1586 * @width: width in pixels of the panel, used for panel quirk detection
1587 * @height: height in pixels of the panel, used for panel quirk detection
1589 * This function should only be called for built-in panels, after setting
1590 * connector->display_info.panel_orientation first (if known).
1592 * This function will check for platform specific (e.g. DMI based) quirks
1593 * overriding display_info.panel_orientation first, then if panel_orientation
1594 * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the
1595 * "panel orientation" property to the connector.
1598 * Zero on success, negative errno on failure.
1600 int drm_connector_init_panel_orientation_property(
1601 struct drm_connector *connector, int width, int height)
1603 struct drm_device *dev = connector->dev;
1604 struct drm_display_info *info = &connector->display_info;
1605 struct drm_property *prop;
1606 int orientation_quirk;
1608 orientation_quirk = drm_get_panel_orientation_quirk(width, height);
1609 if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1610 info->panel_orientation = orientation_quirk;
1612 if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1615 prop = dev->mode_config.panel_orientation_property;
1617 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1618 "panel orientation",
1619 drm_panel_orientation_enum_list,
1620 ARRAY_SIZE(drm_panel_orientation_enum_list));
1624 dev->mode_config.panel_orientation_property = prop;
1627 drm_object_attach_property(&connector->base, prop,
1628 info->panel_orientation);
1631 EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
1633 int drm_connector_set_obj_prop(struct drm_mode_object *obj,
1634 struct drm_property *property,
1638 struct drm_connector *connector = obj_to_connector(obj);
1640 /* Do DPMS ourselves */
1641 if (property == connector->dev->mode_config.dpms_property) {
1642 ret = (*connector->funcs->dpms)(connector, (int)value);
1643 } else if (connector->funcs->set_property)
1644 ret = connector->funcs->set_property(connector, property, value);
1647 drm_object_property_set_value(&connector->base, property, value);
1651 int drm_connector_property_set_ioctl(struct drm_device *dev,
1652 void *data, struct drm_file *file_priv)
1654 struct drm_mode_connector_set_property *conn_set_prop = data;
1655 struct drm_mode_obj_set_property obj_set_prop = {
1656 .value = conn_set_prop->value,
1657 .prop_id = conn_set_prop->prop_id,
1658 .obj_id = conn_set_prop->connector_id,
1659 .obj_type = DRM_MODE_OBJECT_CONNECTOR
1662 /* It does all the locking and checking we need */
1663 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
1666 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1668 /* For atomic drivers only state objects are synchronously updated and
1669 * protected by modeset locks, so check those first. */
1670 if (connector->state)
1671 return connector->state->best_encoder;
1672 return connector->encoder;
1676 drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1677 const struct list_head *export_list,
1678 const struct drm_file *file_priv)
1681 * If user-space hasn't configured the driver to expose the stereo 3D
1682 * modes, don't expose them.
1684 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1687 * If user-space hasn't configured the driver to expose the modes
1688 * with aspect-ratio, don't expose them. However if such a mode
1689 * is unique, let it be exposed, but reset the aspect-ratio flags
1690 * while preparing the list of user-modes.
1692 if (!file_priv->aspect_ratio_allowed) {
1693 struct drm_display_mode *mode_itr;
1695 list_for_each_entry(mode_itr, export_list, export_head)
1696 if (drm_mode_match(mode_itr, mode,
1697 DRM_MODE_MATCH_TIMINGS |
1698 DRM_MODE_MATCH_CLOCK |
1699 DRM_MODE_MATCH_FLAGS |
1700 DRM_MODE_MATCH_3D_FLAGS))
1707 int drm_mode_getconnector(struct drm_device *dev, void *data,
1708 struct drm_file *file_priv)
1710 struct drm_mode_get_connector *out_resp = data;
1711 struct drm_connector *connector;
1712 struct drm_encoder *encoder;
1713 struct drm_display_mode *mode;
1715 int encoders_count = 0;
1719 struct drm_mode_modeinfo u_mode;
1720 struct drm_mode_modeinfo __user *mode_ptr;
1721 uint32_t __user *encoder_ptr;
1722 LIST_HEAD(export_list);
1724 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1727 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1729 connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
1733 drm_connector_for_each_possible_encoder(connector, encoder, i)
1736 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1738 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1740 drm_connector_for_each_possible_encoder(connector, encoder, i) {
1741 if (put_user(encoder->base.id, encoder_ptr + copied)) {
1748 out_resp->count_encoders = encoders_count;
1750 out_resp->connector_id = connector->base.id;
1751 out_resp->connector_type = connector->connector_type;
1752 out_resp->connector_type_id = connector->connector_type_id;
1754 mutex_lock(&dev->mode_config.mutex);
1755 if (out_resp->count_modes == 0) {
1756 connector->funcs->fill_modes(connector,
1757 dev->mode_config.max_width,
1758 dev->mode_config.max_height);
1761 out_resp->mm_width = connector->display_info.width_mm;
1762 out_resp->mm_height = connector->display_info.height_mm;
1763 out_resp->subpixel = connector->display_info.subpixel_order;
1764 out_resp->connection = connector->status;
1766 /* delayed so we get modes regardless of pre-fill_modes state */
1767 list_for_each_entry(mode, &connector->modes, head)
1768 if (drm_mode_expose_to_userspace(mode, &export_list,
1770 list_add_tail(&mode->export_head, &export_list);
1775 * This ioctl is called twice, once to determine how much space is
1776 * needed, and the 2nd time to fill it.
1777 * The modes that need to be exposed to the user are maintained in the
1778 * 'export_list'. When the ioctl is called first time to determine the,
1779 * space, the export_list gets filled, to find the no.of modes. In the
1780 * 2nd time, the user modes are filled, one by one from the export_list.
1782 if ((out_resp->count_modes >= mode_count) && mode_count) {
1784 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1785 list_for_each_entry(mode, &export_list, export_head) {
1786 drm_mode_convert_to_umode(&u_mode, mode);
1788 * Reset aspect ratio flags of user-mode, if modes with
1789 * aspect-ratio are not supported.
1791 if (!file_priv->aspect_ratio_allowed)
1792 u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
1793 if (copy_to_user(mode_ptr + copied,
1794 &u_mode, sizeof(u_mode))) {
1796 mutex_unlock(&dev->mode_config.mutex);
1803 out_resp->count_modes = mode_count;
1804 mutex_unlock(&dev->mode_config.mutex);
1806 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1807 encoder = drm_connector_get_encoder(connector);
1809 out_resp->encoder_id = encoder->base.id;
1811 out_resp->encoder_id = 0;
1813 /* Only grab properties after probing, to make sure EDID and other
1814 * properties reflect the latest status. */
1815 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1816 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1817 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1818 &out_resp->count_props);
1819 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1822 drm_connector_put(connector);
1831 * Tile groups are used to represent tiled monitors with a unique integer
1832 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
1833 * we store this in a tile group, so we have a common identifier for all tiles
1834 * in a monitor group. The property is called "TILE". Drivers can manage tile
1835 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
1836 * drm_mode_get_tile_group(). But this is only needed for internal panels where
1837 * the tile group information is exposed through a non-standard way.
1840 static void drm_tile_group_free(struct kref *kref)
1842 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
1843 struct drm_device *dev = tg->dev;
1844 mutex_lock(&dev->mode_config.idr_mutex);
1845 idr_remove(&dev->mode_config.tile_idr, tg->id);
1846 mutex_unlock(&dev->mode_config.idr_mutex);
1851 * drm_mode_put_tile_group - drop a reference to a tile group.
1853 * @tg: tile group to drop reference to.
1855 * drop reference to tile group and free if 0.
1857 void drm_mode_put_tile_group(struct drm_device *dev,
1858 struct drm_tile_group *tg)
1860 kref_put(&tg->refcount, drm_tile_group_free);
1862 EXPORT_SYMBOL(drm_mode_put_tile_group);
1865 * drm_mode_get_tile_group - get a reference to an existing tile group
1867 * @topology: 8-bytes unique per monitor.
1869 * Use the unique bytes to get a reference to an existing tile group.
1872 * tile group or NULL if not found.
1874 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1877 struct drm_tile_group *tg;
1879 mutex_lock(&dev->mode_config.idr_mutex);
1880 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
1881 if (!memcmp(tg->group_data, topology, 8)) {
1882 if (!kref_get_unless_zero(&tg->refcount))
1884 mutex_unlock(&dev->mode_config.idr_mutex);
1888 mutex_unlock(&dev->mode_config.idr_mutex);
1891 EXPORT_SYMBOL(drm_mode_get_tile_group);
1894 * drm_mode_create_tile_group - create a tile group from a displayid description
1896 * @topology: 8-bytes unique per monitor.
1898 * Create a tile group for the unique monitor, and get a unique
1899 * identifier for the tile group.
1902 * new tile group or error.
1904 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1907 struct drm_tile_group *tg;
1910 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
1912 return ERR_PTR(-ENOMEM);
1914 kref_init(&tg->refcount);
1915 memcpy(tg->group_data, topology, 8);
1918 mutex_lock(&dev->mode_config.idr_mutex);
1919 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
1927 mutex_unlock(&dev->mode_config.idr_mutex);
1930 EXPORT_SYMBOL(drm_mode_create_tile_group);