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
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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_mode_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" },
92 void drm_connector_ida_init(void)
96 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
97 ida_init(&drm_connector_enum_list[i].ida);
100 void drm_connector_ida_destroy(void)
104 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
105 ida_destroy(&drm_connector_enum_list[i].ida);
109 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
110 * @connector: connector to quwery
112 * The kernel supports per-connector configuration of its consoles through
113 * use of the video= parameter. This function parses that option and
114 * extracts the user's specified mode (or enable/disable status) for a
115 * particular connector. This is typically only used during the early fbdev
118 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
120 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
123 if (fb_get_options(connector->name, &option))
126 if (!drm_mode_parse_command_line_for_connector(option,
132 DRM_INFO("forcing %s connector %s\n", connector->name,
133 drm_get_connector_force_name(mode->force));
134 connector->force = mode->force;
137 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
139 mode->xres, mode->yres,
140 mode->refresh_specified ? mode->refresh : 60,
141 mode->rb ? " reduced blanking" : "",
142 mode->margins ? " with margins" : "",
143 mode->interlace ? " interlaced" : "");
146 static void drm_connector_free(struct kref *kref)
148 struct drm_connector *connector =
149 container_of(kref, struct drm_connector, base.refcount);
150 struct drm_device *dev = connector->dev;
152 drm_mode_object_unregister(dev, &connector->base);
153 connector->funcs->destroy(connector);
156 void drm_connector_free_work_fn(struct work_struct *work)
158 struct drm_connector *connector, *n;
159 struct drm_device *dev =
160 container_of(work, struct drm_device, mode_config.connector_free_work);
161 struct drm_mode_config *config = &dev->mode_config;
163 struct llist_node *freed;
165 spin_lock_irqsave(&config->connector_list_lock, flags);
166 freed = llist_del_all(&config->connector_free_list);
167 spin_unlock_irqrestore(&config->connector_list_lock, flags);
169 llist_for_each_entry_safe(connector, n, freed, free_node) {
170 drm_mode_object_unregister(dev, &connector->base);
171 connector->funcs->destroy(connector);
176 * drm_connector_init - Init a preallocated connector
178 * @connector: the connector to init
179 * @funcs: callbacks for this connector
180 * @connector_type: user visible type of the connector
182 * Initialises a preallocated connector. Connectors should be
183 * subclassed as part of driver connector objects.
186 * Zero on success, error code on failure.
188 int drm_connector_init(struct drm_device *dev,
189 struct drm_connector *connector,
190 const struct drm_connector_funcs *funcs,
193 struct drm_mode_config *config = &dev->mode_config;
195 struct ida *connector_ida =
196 &drm_connector_enum_list[connector_type].ida;
198 ret = __drm_mode_object_add(dev, &connector->base,
199 DRM_MODE_OBJECT_CONNECTOR,
200 false, drm_connector_free);
204 connector->base.properties = &connector->properties;
205 connector->dev = dev;
206 connector->funcs = funcs;
208 ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
211 connector->index = ret;
214 connector->connector_type = connector_type;
215 connector->connector_type_id =
216 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
217 if (connector->connector_type_id < 0) {
218 ret = connector->connector_type_id;
222 kasprintf(GFP_KERNEL, "%s-%d",
223 drm_connector_enum_list[connector_type].name,
224 connector->connector_type_id);
225 if (!connector->name) {
227 goto out_put_type_id;
230 INIT_LIST_HEAD(&connector->probed_modes);
231 INIT_LIST_HEAD(&connector->modes);
232 mutex_init(&connector->mutex);
233 connector->edid_blob_ptr = NULL;
234 connector->status = connector_status_unknown;
235 connector->display_info.panel_orientation =
236 DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
238 drm_connector_get_cmdline_mode(connector);
240 /* We should add connectors at the end to avoid upsetting the connector
242 spin_lock_irq(&config->connector_list_lock);
243 list_add_tail(&connector->head, &config->connector_list);
244 config->num_connector++;
245 spin_unlock_irq(&config->connector_list_lock);
247 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
248 drm_object_attach_property(&connector->base,
249 config->edid_property,
252 drm_object_attach_property(&connector->base,
253 config->dpms_property, 0);
255 drm_object_attach_property(&connector->base,
256 config->link_status_property,
259 drm_object_attach_property(&connector->base,
260 config->non_desktop_property,
263 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
264 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
267 connector->debugfs_entry = NULL;
270 ida_simple_remove(connector_ida, connector->connector_type_id);
273 ida_simple_remove(&config->connector_ida, connector->index);
276 drm_mode_object_unregister(dev, &connector->base);
280 EXPORT_SYMBOL(drm_connector_init);
283 * drm_mode_connector_attach_encoder - attach a connector to an encoder
284 * @connector: connector to attach
285 * @encoder: encoder to attach @connector to
287 * This function links up a connector to an encoder. Note that the routing
288 * restrictions between encoders and crtcs are exposed to userspace through the
289 * possible_clones and possible_crtcs bitmasks.
292 * Zero on success, negative errno on failure.
294 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
295 struct drm_encoder *encoder)
300 * In the past, drivers have attempted to model the static association
301 * of connector to encoder in simple connector/encoder devices using a
302 * direct assignment of connector->encoder = encoder. This connection
303 * is a logical one and the responsibility of the core, so drivers are
304 * expected not to mess with this.
306 * Note that the error return should've been enough here, but a large
307 * majority of drivers ignores the return value, so add in a big WARN
308 * to get people's attention.
310 if (WARN_ON(connector->encoder))
313 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
314 if (connector->encoder_ids[i] == 0) {
315 connector->encoder_ids[i] = encoder->base.id;
321 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
323 static void drm_mode_remove(struct drm_connector *connector,
324 struct drm_display_mode *mode)
326 list_del(&mode->head);
327 drm_mode_destroy(connector->dev, mode);
331 * drm_connector_cleanup - cleans up an initialised connector
332 * @connector: connector to cleanup
334 * Cleans up the connector but doesn't free the object.
336 void drm_connector_cleanup(struct drm_connector *connector)
338 struct drm_device *dev = connector->dev;
339 struct drm_display_mode *mode, *t;
341 /* The connector should have been removed from userspace long before
342 * it is finally destroyed.
344 if (WARN_ON(connector->registered))
345 drm_connector_unregister(connector);
347 if (connector->tile_group) {
348 drm_mode_put_tile_group(dev, connector->tile_group);
349 connector->tile_group = NULL;
352 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
353 drm_mode_remove(connector, mode);
355 list_for_each_entry_safe(mode, t, &connector->modes, head)
356 drm_mode_remove(connector, mode);
358 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
359 connector->connector_type_id);
361 ida_simple_remove(&dev->mode_config.connector_ida,
364 kfree(connector->display_info.bus_formats);
365 drm_mode_object_unregister(dev, &connector->base);
366 kfree(connector->name);
367 connector->name = NULL;
368 spin_lock_irq(&dev->mode_config.connector_list_lock);
369 list_del(&connector->head);
370 dev->mode_config.num_connector--;
371 spin_unlock_irq(&dev->mode_config.connector_list_lock);
373 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
374 if (connector->state && connector->funcs->atomic_destroy_state)
375 connector->funcs->atomic_destroy_state(connector,
378 mutex_destroy(&connector->mutex);
380 memset(connector, 0, sizeof(*connector));
382 EXPORT_SYMBOL(drm_connector_cleanup);
385 * drm_connector_register - register a connector
386 * @connector: the connector to register
388 * Register userspace interfaces for a connector
391 * Zero on success, error code on failure.
393 int drm_connector_register(struct drm_connector *connector)
397 if (!connector->dev->registered)
400 mutex_lock(&connector->mutex);
401 if (connector->registered)
404 ret = drm_sysfs_connector_add(connector);
408 ret = drm_debugfs_connector_add(connector);
413 if (connector->funcs->late_register) {
414 ret = connector->funcs->late_register(connector);
419 drm_mode_object_register(connector->dev, &connector->base);
421 connector->registered = true;
425 drm_debugfs_connector_remove(connector);
427 drm_sysfs_connector_remove(connector);
429 mutex_unlock(&connector->mutex);
432 EXPORT_SYMBOL(drm_connector_register);
435 * drm_connector_unregister - unregister a connector
436 * @connector: the connector to unregister
438 * Unregister userspace interfaces for a connector
440 void drm_connector_unregister(struct drm_connector *connector)
442 mutex_lock(&connector->mutex);
443 if (!connector->registered) {
444 mutex_unlock(&connector->mutex);
448 if (connector->funcs->early_unregister)
449 connector->funcs->early_unregister(connector);
451 drm_sysfs_connector_remove(connector);
452 drm_debugfs_connector_remove(connector);
454 connector->registered = false;
455 mutex_unlock(&connector->mutex);
457 EXPORT_SYMBOL(drm_connector_unregister);
459 void drm_connector_unregister_all(struct drm_device *dev)
461 struct drm_connector *connector;
462 struct drm_connector_list_iter conn_iter;
464 drm_connector_list_iter_begin(dev, &conn_iter);
465 drm_for_each_connector_iter(connector, &conn_iter)
466 drm_connector_unregister(connector);
467 drm_connector_list_iter_end(&conn_iter);
470 int drm_connector_register_all(struct drm_device *dev)
472 struct drm_connector *connector;
473 struct drm_connector_list_iter conn_iter;
476 drm_connector_list_iter_begin(dev, &conn_iter);
477 drm_for_each_connector_iter(connector, &conn_iter) {
478 ret = drm_connector_register(connector);
482 drm_connector_list_iter_end(&conn_iter);
485 drm_connector_unregister_all(dev);
490 * drm_get_connector_status_name - return a string for connector status
491 * @status: connector status to compute name of
493 * In contrast to the other drm_get_*_name functions this one here returns a
494 * const pointer and hence is threadsafe.
496 const char *drm_get_connector_status_name(enum drm_connector_status status)
498 if (status == connector_status_connected)
500 else if (status == connector_status_disconnected)
501 return "disconnected";
505 EXPORT_SYMBOL(drm_get_connector_status_name);
508 * drm_get_connector_force_name - return a string for connector force
509 * @force: connector force to get name of
511 * Returns: const pointer to name.
513 const char *drm_get_connector_force_name(enum drm_connector_force force)
516 case DRM_FORCE_UNSPECIFIED:
517 return "unspecified";
522 case DRM_FORCE_ON_DIGITAL:
529 #ifdef CONFIG_LOCKDEP
530 static struct lockdep_map connector_list_iter_dep_map = {
531 .name = "drm_connector_list_iter"
536 * drm_connector_list_iter_begin - initialize a connector_list iterator
538 * @iter: connector_list iterator
540 * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
541 * must always be cleaned up again by calling drm_connector_list_iter_end().
542 * Iteration itself happens using drm_connector_list_iter_next() or
543 * drm_for_each_connector_iter().
545 void drm_connector_list_iter_begin(struct drm_device *dev,
546 struct drm_connector_list_iter *iter)
550 lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
552 EXPORT_SYMBOL(drm_connector_list_iter_begin);
555 * Extra-safe connector put function that works in any context. Should only be
556 * used from the connector_iter functions, where we never really expect to
557 * actually release the connector when dropping our final reference.
560 __drm_connector_put_safe(struct drm_connector *conn)
562 struct drm_mode_config *config = &conn->dev->mode_config;
564 lockdep_assert_held(&config->connector_list_lock);
566 if (!refcount_dec_and_test(&conn->base.refcount.refcount))
569 llist_add(&conn->free_node, &config->connector_free_list);
570 schedule_work(&config->connector_free_work);
574 * drm_connector_list_iter_next - return next connector
575 * @iter: connectr_list iterator
577 * Returns the next connector for @iter, or NULL when the list walk has
580 struct drm_connector *
581 drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
583 struct drm_connector *old_conn = iter->conn;
584 struct drm_mode_config *config = &iter->dev->mode_config;
585 struct list_head *lhead;
588 spin_lock_irqsave(&config->connector_list_lock, flags);
589 lhead = old_conn ? &old_conn->head : &config->connector_list;
592 if (lhead->next == &config->connector_list) {
598 iter->conn = list_entry(lhead, struct drm_connector, head);
600 /* loop until it's not a zombie connector */
601 } while (!kref_get_unless_zero(&iter->conn->base.refcount));
604 __drm_connector_put_safe(old_conn);
605 spin_unlock_irqrestore(&config->connector_list_lock, flags);
609 EXPORT_SYMBOL(drm_connector_list_iter_next);
612 * drm_connector_list_iter_end - tear down a connector_list iterator
613 * @iter: connector_list iterator
615 * Tears down @iter and releases any resources (like &drm_connector references)
616 * acquired while walking the list. This must always be called, both when the
617 * iteration completes fully or when it was aborted without walking the entire
620 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
622 struct drm_mode_config *config = &iter->dev->mode_config;
627 spin_lock_irqsave(&config->connector_list_lock, flags);
628 __drm_connector_put_safe(iter->conn);
629 spin_unlock_irqrestore(&config->connector_list_lock, flags);
631 lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
633 EXPORT_SYMBOL(drm_connector_list_iter_end);
635 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
636 { SubPixelUnknown, "Unknown" },
637 { SubPixelHorizontalRGB, "Horizontal RGB" },
638 { SubPixelHorizontalBGR, "Horizontal BGR" },
639 { SubPixelVerticalRGB, "Vertical RGB" },
640 { SubPixelVerticalBGR, "Vertical BGR" },
641 { SubPixelNone, "None" },
645 * drm_get_subpixel_order_name - return a string for a given subpixel enum
646 * @order: enum of subpixel_order
648 * Note you could abuse this and return something out of bounds, but that
649 * would be a caller error. No unscrubbed user data should make it here.
651 const char *drm_get_subpixel_order_name(enum subpixel_order order)
653 return drm_subpixel_enum_list[order].name;
655 EXPORT_SYMBOL(drm_get_subpixel_order_name);
657 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
658 { DRM_MODE_DPMS_ON, "On" },
659 { DRM_MODE_DPMS_STANDBY, "Standby" },
660 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
661 { DRM_MODE_DPMS_OFF, "Off" }
663 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
665 static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
666 { DRM_MODE_LINK_STATUS_GOOD, "Good" },
667 { DRM_MODE_LINK_STATUS_BAD, "Bad" },
671 * drm_display_info_set_bus_formats - set the supported bus formats
672 * @info: display info to store bus formats in
673 * @formats: array containing the supported bus formats
674 * @num_formats: the number of entries in the fmts array
676 * Store the supported bus formats in display info structure.
677 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
678 * a full list of available formats.
680 int drm_display_info_set_bus_formats(struct drm_display_info *info,
682 unsigned int num_formats)
686 if (!formats && num_formats)
689 if (formats && num_formats) {
690 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
696 kfree(info->bus_formats);
697 info->bus_formats = fmts;
698 info->num_bus_formats = num_formats;
702 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
704 /* Optional connector properties. */
705 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
706 { DRM_MODE_SCALE_NONE, "None" },
707 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
708 { DRM_MODE_SCALE_CENTER, "Center" },
709 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
712 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
713 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
714 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
715 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
718 static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
719 { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
720 { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
721 { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
722 { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
725 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
726 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
727 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
728 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
730 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
732 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
733 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
734 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
735 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
737 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
738 drm_dvi_i_subconnector_enum_list)
740 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
741 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
742 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
743 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
744 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
745 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
747 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
749 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
750 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
751 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
752 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
753 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
754 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
756 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
757 drm_tv_subconnector_enum_list)
759 static struct drm_prop_enum_list drm_cp_enum_list[] = {
760 { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" },
761 { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" },
762 { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" },
764 DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
767 * DOC: standard connector properties
769 * DRM connectors have a few standardized properties:
772 * Blob property which contains the current EDID read from the sink. This
773 * is useful to parse sink identification information like vendor, model
774 * and serial. Drivers should update this property by calling
775 * drm_mode_connector_update_edid_property(), usually after having parsed
776 * the EDID using drm_add_edid_modes(). Userspace cannot change this
779 * Legacy property for setting the power state of the connector. For atomic
780 * drivers this is only provided for backwards compatibility with existing
781 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
782 * connector is linked to. Drivers should never set this property directly,
783 * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
784 * callback. For atomic drivers the remapping to the "ACTIVE" property is
785 * implemented in the DRM core. This is the only standard connector
786 * property that userspace can change.
788 * Note that this property cannot be set through the MODE_ATOMIC ioctl,
789 * userspace must use "ACTIVE" on the CRTC instead.
793 * For userspace also running on legacy drivers the "DPMS" semantics are a
794 * lot more complicated. First, userspace cannot rely on the "DPMS" value
795 * returned by the GETCONNECTOR actually reflecting reality, because many
796 * drivers fail to update it. For atomic drivers this is taken care of in
797 * drm_atomic_helper_update_legacy_modeset_state().
799 * The second issue is that the DPMS state is only well-defined when the
800 * connector is connected to a CRTC. In atomic the DRM core enforces that
801 * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
803 * Finally, when enabling an output using the legacy SETCONFIG ioctl then
804 * "DPMS" is forced to ON. But see above, that might not be reflected in
805 * the software value on legacy drivers.
807 * Summarizing: Only set "DPMS" when the connector is known to be enabled,
808 * assume that a successful SETCONFIG call also sets "DPMS" to on, and
809 * never read back the value of "DPMS" because it can be incorrect.
811 * Connector path property to identify how this sink is physically
812 * connected. Used by DP MST. This should be set by calling
813 * drm_mode_connector_set_path_property(), in the case of DP MST with the
814 * path property the MST manager created. Userspace cannot change this
817 * Connector tile group property to indicate how a set of DRM connector
818 * compose together into one logical screen. This is used by both high-res
819 * external screens (often only using a single cable, but exposing multiple
820 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
821 * are not gen-locked. Note that for tiled panels which are genlocked, like
822 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
823 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
824 * should update this value using drm_mode_connector_set_tile_property().
825 * Userspace cannot change this property.
827 * Connector link-status property to indicate the status of link. The
828 * default value of link-status is "GOOD". If something fails during or
829 * after modeset, the kernel driver may set this to "BAD" and issue a
830 * hotplug uevent. Drivers should update this value using
831 * drm_mode_connector_set_link_status_property().
833 * Indicates the output should be ignored for purposes of displaying a
834 * standard desktop environment or console. This is most likely because
835 * the output device is not rectilinear.
836 * Content Protection:
837 * This property is used by userspace to request the kernel protect future
838 * content communicated over the link. When requested, kernel will apply
839 * the appropriate means of protection (most often HDCP), and use the
840 * property to tell userspace the protection is active.
842 * Drivers can set this up by calling
843 * drm_connector_attach_content_protection_property() on initialization.
845 * The value of this property can be one of the following:
847 * - DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
848 * The link is not protected, content is transmitted in the clear.
849 * - DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
850 * Userspace has requested content protection, but the link is not
851 * currently protected. When in this state, kernel should enable
852 * Content Protection as soon as possible.
853 * - DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
854 * Userspace has requested content protection, and the link is
855 * protected. Only the driver can set the property to this value.
856 * If userspace attempts to set to ENABLED, kernel will return
861 * - DESIRED state should be preserved until userspace de-asserts it by
862 * setting the property to UNDESIRED. This means ENABLED should only
863 * transition to UNDESIRED when the user explicitly requests it.
864 * - If the state is DESIRED, kernel should attempt to re-authenticate the
865 * link whenever possible. This includes across disable/enable, dpms,
866 * hotplug, downstream device changes, link status failures, etc..
867 * - Userspace is responsible for polling the property to determine when
868 * the value transitions from ENABLED to DESIRED. This signifies the link
869 * is no longer protected and userspace should take appropriate action
870 * (whatever that might be).
872 * Connectors also have one standardized atomic property:
875 * Mode object ID of the &drm_crtc this connector should be connected to.
877 * Connectors for LCD panels may also have one standardized property:
880 * On some devices the LCD panel is mounted in the casing in such a way
881 * that the up/top side of the panel does not match with the top side of
882 * the device. Userspace can use this property to check for this.
883 * Note that input coordinates from touchscreens (input devices with
884 * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
885 * coordinates, so if userspace rotates the picture to adjust for
886 * the orientation it must also apply the same transformation to the
887 * touchscreen input coordinates.
890 int drm_connector_create_standard_properties(struct drm_device *dev)
892 struct drm_property *prop;
894 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
895 DRM_MODE_PROP_IMMUTABLE,
899 dev->mode_config.edid_property = prop;
901 prop = drm_property_create_enum(dev, 0,
902 "DPMS", drm_dpms_enum_list,
903 ARRAY_SIZE(drm_dpms_enum_list));
906 dev->mode_config.dpms_property = prop;
908 prop = drm_property_create(dev,
910 DRM_MODE_PROP_IMMUTABLE,
914 dev->mode_config.path_property = prop;
916 prop = drm_property_create(dev,
918 DRM_MODE_PROP_IMMUTABLE,
922 dev->mode_config.tile_property = prop;
924 prop = drm_property_create_enum(dev, 0, "link-status",
925 drm_link_status_enum_list,
926 ARRAY_SIZE(drm_link_status_enum_list));
929 dev->mode_config.link_status_property = prop;
931 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
934 dev->mode_config.non_desktop_property = prop;
940 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
943 * Called by a driver the first time a DVI-I connector is made.
945 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
947 struct drm_property *dvi_i_selector;
948 struct drm_property *dvi_i_subconnector;
950 if (dev->mode_config.dvi_i_select_subconnector_property)
954 drm_property_create_enum(dev, 0,
955 "select subconnector",
956 drm_dvi_i_select_enum_list,
957 ARRAY_SIZE(drm_dvi_i_select_enum_list));
958 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
960 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
962 drm_dvi_i_subconnector_enum_list,
963 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
964 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
968 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
971 * drm_create_tv_properties - create TV specific connector properties
973 * @num_modes: number of different TV formats (modes) supported
974 * @modes: array of pointers to strings containing name of each format
976 * Called by a driver's TV initialization routine, this function creates
977 * the TV specific connector properties for a given device. Caller is
978 * responsible for allocating a list of format names and passing them to
981 int drm_mode_create_tv_properties(struct drm_device *dev,
982 unsigned int num_modes,
983 const char * const modes[])
985 struct drm_property *tv_selector;
986 struct drm_property *tv_subconnector;
989 if (dev->mode_config.tv_select_subconnector_property)
993 * Basic connector properties
995 tv_selector = drm_property_create_enum(dev, 0,
996 "select subconnector",
997 drm_tv_select_enum_list,
998 ARRAY_SIZE(drm_tv_select_enum_list));
1002 dev->mode_config.tv_select_subconnector_property = tv_selector;
1005 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1007 drm_tv_subconnector_enum_list,
1008 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1009 if (!tv_subconnector)
1011 dev->mode_config.tv_subconnector_property = tv_subconnector;
1014 * Other, TV specific properties: margins & TV modes.
1016 dev->mode_config.tv_left_margin_property =
1017 drm_property_create_range(dev, 0, "left margin", 0, 100);
1018 if (!dev->mode_config.tv_left_margin_property)
1021 dev->mode_config.tv_right_margin_property =
1022 drm_property_create_range(dev, 0, "right margin", 0, 100);
1023 if (!dev->mode_config.tv_right_margin_property)
1026 dev->mode_config.tv_top_margin_property =
1027 drm_property_create_range(dev, 0, "top margin", 0, 100);
1028 if (!dev->mode_config.tv_top_margin_property)
1031 dev->mode_config.tv_bottom_margin_property =
1032 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1033 if (!dev->mode_config.tv_bottom_margin_property)
1036 dev->mode_config.tv_mode_property =
1037 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1039 if (!dev->mode_config.tv_mode_property)
1042 for (i = 0; i < num_modes; i++)
1043 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1046 dev->mode_config.tv_brightness_property =
1047 drm_property_create_range(dev, 0, "brightness", 0, 100);
1048 if (!dev->mode_config.tv_brightness_property)
1051 dev->mode_config.tv_contrast_property =
1052 drm_property_create_range(dev, 0, "contrast", 0, 100);
1053 if (!dev->mode_config.tv_contrast_property)
1056 dev->mode_config.tv_flicker_reduction_property =
1057 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1058 if (!dev->mode_config.tv_flicker_reduction_property)
1061 dev->mode_config.tv_overscan_property =
1062 drm_property_create_range(dev, 0, "overscan", 0, 100);
1063 if (!dev->mode_config.tv_overscan_property)
1066 dev->mode_config.tv_saturation_property =
1067 drm_property_create_range(dev, 0, "saturation", 0, 100);
1068 if (!dev->mode_config.tv_saturation_property)
1071 dev->mode_config.tv_hue_property =
1072 drm_property_create_range(dev, 0, "hue", 0, 100);
1073 if (!dev->mode_config.tv_hue_property)
1080 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1083 * drm_mode_create_scaling_mode_property - create scaling mode property
1086 * Called by a driver the first time it's needed, must be attached to desired
1089 * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1090 * instead to correctly assign &drm_connector_state.picture_aspect_ratio
1091 * in the atomic state.
1093 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1095 struct drm_property *scaling_mode;
1097 if (dev->mode_config.scaling_mode_property)
1101 drm_property_create_enum(dev, 0, "scaling mode",
1102 drm_scaling_mode_enum_list,
1103 ARRAY_SIZE(drm_scaling_mode_enum_list));
1105 dev->mode_config.scaling_mode_property = scaling_mode;
1109 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1112 * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1113 * @connector: connector to attach scaling mode property on.
1114 * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1116 * This is used to add support for scaling mode to atomic drivers.
1117 * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
1118 * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1120 * This is the atomic version of drm_mode_create_scaling_mode_property().
1123 * Zero on success, negative errno on failure.
1125 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1126 u32 scaling_mode_mask)
1128 struct drm_device *dev = connector->dev;
1129 struct drm_property *scaling_mode_property;
1131 const unsigned valid_scaling_mode_mask =
1132 (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1134 if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
1135 scaling_mode_mask & ~valid_scaling_mode_mask))
1138 scaling_mode_property =
1139 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1140 hweight32(scaling_mode_mask));
1142 if (!scaling_mode_property)
1145 for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1148 if (!(BIT(i) & scaling_mode_mask))
1151 ret = drm_property_add_enum(scaling_mode_property, j++,
1152 drm_scaling_mode_enum_list[i].type,
1153 drm_scaling_mode_enum_list[i].name);
1156 drm_property_destroy(dev, scaling_mode_property);
1162 drm_object_attach_property(&connector->base,
1163 scaling_mode_property, 0);
1165 connector->scaling_mode_property = scaling_mode_property;
1169 EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1172 * drm_connector_attach_content_protection_property - attach content protection
1175 * @connector: connector to attach CP property on.
1177 * This is used to add support for content protection on select connectors.
1178 * Content Protection is intentionally vague to allow for different underlying
1179 * technologies, however it is most implemented by HDCP.
1181 * The content protection will be set to &drm_connector_state.content_protection
1184 * Zero on success, negative errno on failure.
1186 int drm_connector_attach_content_protection_property(
1187 struct drm_connector *connector)
1189 struct drm_device *dev = connector->dev;
1190 struct drm_property *prop;
1192 prop = drm_property_create_enum(dev, 0, "Content Protection",
1194 ARRAY_SIZE(drm_cp_enum_list));
1198 drm_object_attach_property(&connector->base, prop,
1199 DRM_MODE_CONTENT_PROTECTION_UNDESIRED);
1201 connector->content_protection_property = prop;
1205 EXPORT_SYMBOL(drm_connector_attach_content_protection_property);
1208 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1211 * Called by a driver the first time it's needed, must be attached to desired
1215 * Zero on success, negative errno on failure.
1217 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1219 if (dev->mode_config.aspect_ratio_property)
1222 dev->mode_config.aspect_ratio_property =
1223 drm_property_create_enum(dev, 0, "aspect ratio",
1224 drm_aspect_ratio_enum_list,
1225 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1227 if (dev->mode_config.aspect_ratio_property == NULL)
1232 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1235 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1238 * Create the the suggested x/y offset property for connectors.
1240 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1242 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1245 dev->mode_config.suggested_x_property =
1246 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1248 dev->mode_config.suggested_y_property =
1249 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1251 if (dev->mode_config.suggested_x_property == NULL ||
1252 dev->mode_config.suggested_y_property == NULL)
1256 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1259 * drm_mode_connector_set_path_property - set tile property on connector
1260 * @connector: connector to set property on.
1261 * @path: path to use for property; must not be NULL.
1263 * This creates a property to expose to userspace to specify a
1264 * connector path. This is mainly used for DisplayPort MST where
1265 * connectors have a topology and we want to allow userspace to give
1266 * them more meaningful names.
1269 * Zero on success, negative errno on failure.
1271 int drm_mode_connector_set_path_property(struct drm_connector *connector,
1274 struct drm_device *dev = connector->dev;
1277 ret = drm_property_replace_global_blob(dev,
1278 &connector->path_blob_ptr,
1282 dev->mode_config.path_property);
1285 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
1288 * drm_mode_connector_set_tile_property - set tile property on connector
1289 * @connector: connector to set property on.
1291 * This looks up the tile information for a connector, and creates a
1292 * property for userspace to parse if it exists. The property is of
1293 * the form of 8 integers using ':' as a separator.
1296 * Zero on success, errno on failure.
1298 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
1300 struct drm_device *dev = connector->dev;
1304 if (!connector->has_tile) {
1305 ret = drm_property_replace_global_blob(dev,
1306 &connector->tile_blob_ptr,
1310 dev->mode_config.tile_property);
1314 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
1315 connector->tile_group->id, connector->tile_is_single_monitor,
1316 connector->num_h_tile, connector->num_v_tile,
1317 connector->tile_h_loc, connector->tile_v_loc,
1318 connector->tile_h_size, connector->tile_v_size);
1320 ret = drm_property_replace_global_blob(dev,
1321 &connector->tile_blob_ptr,
1325 dev->mode_config.tile_property);
1328 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
1331 * drm_mode_connector_update_edid_property - update the edid property of a connector
1332 * @connector: drm connector
1333 * @edid: new value of the edid property
1335 * This function creates a new blob modeset object and assigns its id to the
1336 * connector's edid property.
1339 * Zero on success, negative errno on failure.
1341 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
1342 const struct edid *edid)
1344 struct drm_device *dev = connector->dev;
1348 /* ignore requests to set edid when overridden */
1349 if (connector->override_edid)
1353 size = EDID_LENGTH * (1 + edid->extensions);
1355 /* Set the display info, using edid if available, otherwise
1356 * reseting the values to defaults. This duplicates the work
1357 * done in drm_add_edid_modes, but that function is not
1358 * consistently called before this one in all drivers and the
1359 * computation is cheap enough that it seems better to
1360 * duplicate it rather than attempt to ensure some arbitrary
1361 * ordering of calls.
1364 drm_add_display_info(connector, edid);
1366 drm_reset_display_info(connector);
1368 drm_object_property_set_value(&connector->base,
1369 dev->mode_config.non_desktop_property,
1370 connector->display_info.non_desktop);
1372 ret = drm_property_replace_global_blob(dev,
1373 &connector->edid_blob_ptr,
1377 dev->mode_config.edid_property);
1380 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
1383 * drm_mode_connector_set_link_status_property - Set link status property of a connector
1384 * @connector: drm connector
1385 * @link_status: new value of link status property (0: Good, 1: Bad)
1387 * In usual working scenario, this link status property will always be set to
1388 * "GOOD". If something fails during or after a mode set, the kernel driver
1389 * may set this link status property to "BAD". The caller then needs to send a
1390 * hotplug uevent for userspace to re-check the valid modes through
1391 * GET_CONNECTOR_IOCTL and retry modeset.
1393 * Note: Drivers cannot rely on userspace to support this property and
1394 * issue a modeset. As such, they may choose to handle issues (like
1395 * re-training a link) without userspace's intervention.
1397 * The reason for adding this property is to handle link training failures, but
1398 * it is not limited to DP or link training. For example, if we implement
1399 * asynchronous setcrtc, this property can be used to report any failures in that.
1401 void drm_mode_connector_set_link_status_property(struct drm_connector *connector,
1402 uint64_t link_status)
1404 struct drm_device *dev = connector->dev;
1406 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1407 connector->state->link_status = link_status;
1408 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1410 EXPORT_SYMBOL(drm_mode_connector_set_link_status_property);
1413 * drm_connector_init_panel_orientation_property -
1414 * initialize the connecters panel_orientation property
1415 * @connector: connector for which to init the panel-orientation property.
1416 * @width: width in pixels of the panel, used for panel quirk detection
1417 * @height: height in pixels of the panel, used for panel quirk detection
1419 * This function should only be called for built-in panels, after setting
1420 * connector->display_info.panel_orientation first (if known).
1422 * This function will check for platform specific (e.g. DMI based) quirks
1423 * overriding display_info.panel_orientation first, then if panel_orientation
1424 * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the
1425 * "panel orientation" property to the connector.
1428 * Zero on success, negative errno on failure.
1430 int drm_connector_init_panel_orientation_property(
1431 struct drm_connector *connector, int width, int height)
1433 struct drm_device *dev = connector->dev;
1434 struct drm_display_info *info = &connector->display_info;
1435 struct drm_property *prop;
1436 int orientation_quirk;
1438 orientation_quirk = drm_get_panel_orientation_quirk(width, height);
1439 if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1440 info->panel_orientation = orientation_quirk;
1442 if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1445 prop = dev->mode_config.panel_orientation_property;
1447 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1448 "panel orientation",
1449 drm_panel_orientation_enum_list,
1450 ARRAY_SIZE(drm_panel_orientation_enum_list));
1454 dev->mode_config.panel_orientation_property = prop;
1457 drm_object_attach_property(&connector->base, prop,
1458 info->panel_orientation);
1461 EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
1463 int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
1464 struct drm_property *property,
1468 struct drm_connector *connector = obj_to_connector(obj);
1470 /* Do DPMS ourselves */
1471 if (property == connector->dev->mode_config.dpms_property) {
1472 ret = (*connector->funcs->dpms)(connector, (int)value);
1473 } else if (connector->funcs->set_property)
1474 ret = connector->funcs->set_property(connector, property, value);
1477 drm_object_property_set_value(&connector->base, property, value);
1481 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
1482 void *data, struct drm_file *file_priv)
1484 struct drm_mode_connector_set_property *conn_set_prop = data;
1485 struct drm_mode_obj_set_property obj_set_prop = {
1486 .value = conn_set_prop->value,
1487 .prop_id = conn_set_prop->prop_id,
1488 .obj_id = conn_set_prop->connector_id,
1489 .obj_type = DRM_MODE_OBJECT_CONNECTOR
1492 /* It does all the locking and checking we need */
1493 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
1496 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1498 /* For atomic drivers only state objects are synchronously updated and
1499 * protected by modeset locks, so check those first. */
1500 if (connector->state)
1501 return connector->state->best_encoder;
1502 return connector->encoder;
1505 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1506 const struct drm_file *file_priv)
1509 * If user-space hasn't configured the driver to expose the stereo 3D
1510 * modes, don't expose them.
1512 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1518 int drm_mode_getconnector(struct drm_device *dev, void *data,
1519 struct drm_file *file_priv)
1521 struct drm_mode_get_connector *out_resp = data;
1522 struct drm_connector *connector;
1523 struct drm_encoder *encoder;
1524 struct drm_display_mode *mode;
1526 int encoders_count = 0;
1530 struct drm_mode_modeinfo u_mode;
1531 struct drm_mode_modeinfo __user *mode_ptr;
1532 uint32_t __user *encoder_ptr;
1534 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1537 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1539 connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
1543 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1544 if (connector->encoder_ids[i] != 0)
1547 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1549 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1550 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1551 if (connector->encoder_ids[i] != 0) {
1552 if (put_user(connector->encoder_ids[i],
1553 encoder_ptr + copied)) {
1561 out_resp->count_encoders = encoders_count;
1563 out_resp->connector_id = connector->base.id;
1564 out_resp->connector_type = connector->connector_type;
1565 out_resp->connector_type_id = connector->connector_type_id;
1567 mutex_lock(&dev->mode_config.mutex);
1568 if (out_resp->count_modes == 0) {
1569 connector->funcs->fill_modes(connector,
1570 dev->mode_config.max_width,
1571 dev->mode_config.max_height);
1574 out_resp->mm_width = connector->display_info.width_mm;
1575 out_resp->mm_height = connector->display_info.height_mm;
1576 out_resp->subpixel = connector->display_info.subpixel_order;
1577 out_resp->connection = connector->status;
1579 /* delayed so we get modes regardless of pre-fill_modes state */
1580 list_for_each_entry(mode, &connector->modes, head)
1581 if (drm_mode_expose_to_userspace(mode, file_priv))
1585 * This ioctl is called twice, once to determine how much space is
1586 * needed, and the 2nd time to fill it.
1588 if ((out_resp->count_modes >= mode_count) && mode_count) {
1590 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1591 list_for_each_entry(mode, &connector->modes, head) {
1592 if (!drm_mode_expose_to_userspace(mode, file_priv))
1595 drm_mode_convert_to_umode(&u_mode, mode);
1596 if (copy_to_user(mode_ptr + copied,
1597 &u_mode, sizeof(u_mode))) {
1599 mutex_unlock(&dev->mode_config.mutex);
1606 out_resp->count_modes = mode_count;
1607 mutex_unlock(&dev->mode_config.mutex);
1609 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1610 encoder = drm_connector_get_encoder(connector);
1612 out_resp->encoder_id = encoder->base.id;
1614 out_resp->encoder_id = 0;
1616 /* Only grab properties after probing, to make sure EDID and other
1617 * properties reflect the latest status. */
1618 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1619 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1620 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1621 &out_resp->count_props);
1622 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1625 drm_connector_put(connector);
1634 * Tile groups are used to represent tiled monitors with a unique integer
1635 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
1636 * we store this in a tile group, so we have a common identifier for all tiles
1637 * in a monitor group. The property is called "TILE". Drivers can manage tile
1638 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
1639 * drm_mode_get_tile_group(). But this is only needed for internal panels where
1640 * the tile group information is exposed through a non-standard way.
1643 static void drm_tile_group_free(struct kref *kref)
1645 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
1646 struct drm_device *dev = tg->dev;
1647 mutex_lock(&dev->mode_config.idr_mutex);
1648 idr_remove(&dev->mode_config.tile_idr, tg->id);
1649 mutex_unlock(&dev->mode_config.idr_mutex);
1654 * drm_mode_put_tile_group - drop a reference to a tile group.
1656 * @tg: tile group to drop reference to.
1658 * drop reference to tile group and free if 0.
1660 void drm_mode_put_tile_group(struct drm_device *dev,
1661 struct drm_tile_group *tg)
1663 kref_put(&tg->refcount, drm_tile_group_free);
1665 EXPORT_SYMBOL(drm_mode_put_tile_group);
1668 * drm_mode_get_tile_group - get a reference to an existing tile group
1670 * @topology: 8-bytes unique per monitor.
1672 * Use the unique bytes to get a reference to an existing tile group.
1675 * tile group or NULL if not found.
1677 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1680 struct drm_tile_group *tg;
1682 mutex_lock(&dev->mode_config.idr_mutex);
1683 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
1684 if (!memcmp(tg->group_data, topology, 8)) {
1685 if (!kref_get_unless_zero(&tg->refcount))
1687 mutex_unlock(&dev->mode_config.idr_mutex);
1691 mutex_unlock(&dev->mode_config.idr_mutex);
1694 EXPORT_SYMBOL(drm_mode_get_tile_group);
1697 * drm_mode_create_tile_group - create a tile group from a displayid description
1699 * @topology: 8-bytes unique per monitor.
1701 * Create a tile group for the unique monitor, and get a unique
1702 * identifier for the tile group.
1705 * new tile group or error.
1707 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1710 struct drm_tile_group *tg;
1713 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
1715 return ERR_PTR(-ENOMEM);
1717 kref_init(&tg->refcount);
1718 memcpy(tg->group_data, topology, 8);
1721 mutex_lock(&dev->mode_config.idr_mutex);
1722 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
1730 mutex_unlock(&dev->mode_config.idr_mutex);
1733 EXPORT_SYMBOL(drm_mode_create_tile_group);