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
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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>
28 #include "drm_crtc_internal.h"
29 #include "drm_internal.h"
34 * In DRM connectors are the general abstraction for display sinks, and include
35 * als fixed panels or anything else that can display pixels in some form. As
36 * opposed to all other KMS objects representing hardware (like CRTC, encoder or
37 * plane abstractions) connectors can be hotplugged and unplugged at runtime.
38 * Hence they are reference-counted using drm_connector_get() and
39 * drm_connector_put().
41 * KMS driver must create, initialize, register and attach at a &struct
42 * drm_connector for each such sink. The instance is created as other KMS
43 * objects and initialized by setting the following fields. The connector is
44 * initialized with a call to drm_connector_init() with a pointer to the
45 * &struct drm_connector_funcs and a connector type, and then exposed to
46 * userspace with a call to drm_connector_register().
48 * Connectors must be attached to an encoder to be used. For devices that map
49 * connectors to encoders 1:1, the connector should be attached at
50 * initialization time with a call to drm_mode_connector_attach_encoder(). The
51 * driver must also set the &drm_connector.encoder field to point to the
54 * For connectors which are not fixed (like built-in panels) the driver needs to
55 * support hotplug notifications. The simplest way to do that is by using the
56 * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
57 * hardware support for hotplug interrupts. Connectors with hardware hotplug
58 * support can instead use e.g. drm_helper_hpd_irq_event().
61 struct drm_conn_prop_enum_list {
68 * Connector and encoder types.
70 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
71 { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
72 { DRM_MODE_CONNECTOR_VGA, "VGA" },
73 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
74 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
75 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
76 { DRM_MODE_CONNECTOR_Composite, "Composite" },
77 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
78 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
79 { DRM_MODE_CONNECTOR_Component, "Component" },
80 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
81 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
82 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
83 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
84 { DRM_MODE_CONNECTOR_TV, "TV" },
85 { DRM_MODE_CONNECTOR_eDP, "eDP" },
86 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
87 { DRM_MODE_CONNECTOR_DSI, "DSI" },
88 { DRM_MODE_CONNECTOR_DPI, "DPI" },
91 void drm_connector_ida_init(void)
95 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
96 ida_init(&drm_connector_enum_list[i].ida);
99 void drm_connector_ida_destroy(void)
103 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
104 ida_destroy(&drm_connector_enum_list[i].ida);
108 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
109 * @connector: connector to quwery
111 * The kernel supports per-connector configuration of its consoles through
112 * use of the video= parameter. This function parses that option and
113 * extracts the user's specified mode (or enable/disable status) for a
114 * particular connector. This is typically only used during the early fbdev
117 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
119 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
122 if (fb_get_options(connector->name, &option))
125 if (!drm_mode_parse_command_line_for_connector(option,
131 DRM_INFO("forcing %s connector %s\n", connector->name,
132 drm_get_connector_force_name(mode->force));
133 connector->force = mode->force;
136 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
138 mode->xres, mode->yres,
139 mode->refresh_specified ? mode->refresh : 60,
140 mode->rb ? " reduced blanking" : "",
141 mode->margins ? " with margins" : "",
142 mode->interlace ? " interlaced" : "");
145 static void drm_connector_free(struct kref *kref)
147 struct drm_connector *connector =
148 container_of(kref, struct drm_connector, base.refcount);
149 struct drm_device *dev = connector->dev;
151 drm_mode_object_unregister(dev, &connector->base);
152 connector->funcs->destroy(connector);
156 * drm_connector_init - Init a preallocated connector
158 * @connector: the connector to init
159 * @funcs: callbacks for this connector
160 * @connector_type: user visible type of the connector
162 * Initialises a preallocated connector. Connectors should be
163 * subclassed as part of driver connector objects.
166 * Zero on success, error code on failure.
168 int drm_connector_init(struct drm_device *dev,
169 struct drm_connector *connector,
170 const struct drm_connector_funcs *funcs,
173 struct drm_mode_config *config = &dev->mode_config;
175 struct ida *connector_ida =
176 &drm_connector_enum_list[connector_type].ida;
178 ret = __drm_mode_object_add(dev, &connector->base,
179 DRM_MODE_OBJECT_CONNECTOR,
180 false, drm_connector_free);
184 connector->base.properties = &connector->properties;
185 connector->dev = dev;
186 connector->funcs = funcs;
188 ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
191 connector->index = ret;
194 connector->connector_type = connector_type;
195 connector->connector_type_id =
196 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
197 if (connector->connector_type_id < 0) {
198 ret = connector->connector_type_id;
202 kasprintf(GFP_KERNEL, "%s-%d",
203 drm_connector_enum_list[connector_type].name,
204 connector->connector_type_id);
205 if (!connector->name) {
207 goto out_put_type_id;
210 INIT_LIST_HEAD(&connector->probed_modes);
211 INIT_LIST_HEAD(&connector->modes);
212 mutex_init(&connector->mutex);
213 connector->edid_blob_ptr = NULL;
214 connector->status = connector_status_unknown;
216 drm_connector_get_cmdline_mode(connector);
218 /* We should add connectors at the end to avoid upsetting the connector
220 spin_lock_irq(&config->connector_list_lock);
221 list_add_tail(&connector->head, &config->connector_list);
222 config->num_connector++;
223 spin_unlock_irq(&config->connector_list_lock);
225 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
226 drm_object_attach_property(&connector->base,
227 config->edid_property,
230 drm_object_attach_property(&connector->base,
231 config->dpms_property, 0);
233 drm_object_attach_property(&connector->base,
234 config->link_status_property,
237 drm_object_attach_property(&connector->base,
238 config->non_desktop_property,
241 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
242 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
245 connector->debugfs_entry = NULL;
248 ida_simple_remove(connector_ida, connector->connector_type_id);
251 ida_simple_remove(&config->connector_ida, connector->index);
254 drm_mode_object_unregister(dev, &connector->base);
258 EXPORT_SYMBOL(drm_connector_init);
261 * drm_mode_connector_attach_encoder - attach a connector to an encoder
262 * @connector: connector to attach
263 * @encoder: encoder to attach @connector to
265 * This function links up a connector to an encoder. Note that the routing
266 * restrictions between encoders and crtcs are exposed to userspace through the
267 * possible_clones and possible_crtcs bitmasks.
270 * Zero on success, negative errno on failure.
272 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
273 struct drm_encoder *encoder)
278 * In the past, drivers have attempted to model the static association
279 * of connector to encoder in simple connector/encoder devices using a
280 * direct assignment of connector->encoder = encoder. This connection
281 * is a logical one and the responsibility of the core, so drivers are
282 * expected not to mess with this.
284 * Note that the error return should've been enough here, but a large
285 * majority of drivers ignores the return value, so add in a big WARN
286 * to get people's attention.
288 if (WARN_ON(connector->encoder))
291 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
292 if (connector->encoder_ids[i] == 0) {
293 connector->encoder_ids[i] = encoder->base.id;
299 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
301 static void drm_mode_remove(struct drm_connector *connector,
302 struct drm_display_mode *mode)
304 list_del(&mode->head);
305 drm_mode_destroy(connector->dev, mode);
309 * drm_connector_cleanup - cleans up an initialised connector
310 * @connector: connector to cleanup
312 * Cleans up the connector but doesn't free the object.
314 void drm_connector_cleanup(struct drm_connector *connector)
316 struct drm_device *dev = connector->dev;
317 struct drm_display_mode *mode, *t;
319 /* The connector should have been removed from userspace long before
320 * it is finally destroyed.
322 if (WARN_ON(connector->registered))
323 drm_connector_unregister(connector);
325 if (connector->tile_group) {
326 drm_mode_put_tile_group(dev, connector->tile_group);
327 connector->tile_group = NULL;
330 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
331 drm_mode_remove(connector, mode);
333 list_for_each_entry_safe(mode, t, &connector->modes, head)
334 drm_mode_remove(connector, mode);
336 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
337 connector->connector_type_id);
339 ida_simple_remove(&dev->mode_config.connector_ida,
342 kfree(connector->display_info.bus_formats);
343 drm_mode_object_unregister(dev, &connector->base);
344 kfree(connector->name);
345 connector->name = NULL;
346 spin_lock_irq(&dev->mode_config.connector_list_lock);
347 list_del(&connector->head);
348 dev->mode_config.num_connector--;
349 spin_unlock_irq(&dev->mode_config.connector_list_lock);
351 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
352 if (connector->state && connector->funcs->atomic_destroy_state)
353 connector->funcs->atomic_destroy_state(connector,
356 mutex_destroy(&connector->mutex);
358 memset(connector, 0, sizeof(*connector));
360 EXPORT_SYMBOL(drm_connector_cleanup);
363 * drm_connector_register - register a connector
364 * @connector: the connector to register
366 * Register userspace interfaces for a connector
369 * Zero on success, error code on failure.
371 int drm_connector_register(struct drm_connector *connector)
375 if (!connector->dev->registered)
378 mutex_lock(&connector->mutex);
379 if (connector->registered)
382 ret = drm_sysfs_connector_add(connector);
386 ret = drm_debugfs_connector_add(connector);
391 if (connector->funcs->late_register) {
392 ret = connector->funcs->late_register(connector);
397 drm_mode_object_register(connector->dev, &connector->base);
399 connector->registered = true;
403 drm_debugfs_connector_remove(connector);
405 drm_sysfs_connector_remove(connector);
407 mutex_unlock(&connector->mutex);
410 EXPORT_SYMBOL(drm_connector_register);
413 * drm_connector_unregister - unregister a connector
414 * @connector: the connector to unregister
416 * Unregister userspace interfaces for a connector
418 void drm_connector_unregister(struct drm_connector *connector)
420 mutex_lock(&connector->mutex);
421 if (!connector->registered) {
422 mutex_unlock(&connector->mutex);
426 if (connector->funcs->early_unregister)
427 connector->funcs->early_unregister(connector);
429 drm_sysfs_connector_remove(connector);
430 drm_debugfs_connector_remove(connector);
432 connector->registered = false;
433 mutex_unlock(&connector->mutex);
435 EXPORT_SYMBOL(drm_connector_unregister);
437 void drm_connector_unregister_all(struct drm_device *dev)
439 struct drm_connector *connector;
440 struct drm_connector_list_iter conn_iter;
442 drm_connector_list_iter_begin(dev, &conn_iter);
443 drm_for_each_connector_iter(connector, &conn_iter)
444 drm_connector_unregister(connector);
445 drm_connector_list_iter_end(&conn_iter);
448 int drm_connector_register_all(struct drm_device *dev)
450 struct drm_connector *connector;
451 struct drm_connector_list_iter conn_iter;
454 drm_connector_list_iter_begin(dev, &conn_iter);
455 drm_for_each_connector_iter(connector, &conn_iter) {
456 ret = drm_connector_register(connector);
460 drm_connector_list_iter_end(&conn_iter);
463 drm_connector_unregister_all(dev);
468 * drm_get_connector_status_name - return a string for connector status
469 * @status: connector status to compute name of
471 * In contrast to the other drm_get_*_name functions this one here returns a
472 * const pointer and hence is threadsafe.
474 const char *drm_get_connector_status_name(enum drm_connector_status status)
476 if (status == connector_status_connected)
478 else if (status == connector_status_disconnected)
479 return "disconnected";
483 EXPORT_SYMBOL(drm_get_connector_status_name);
486 * drm_get_connector_force_name - return a string for connector force
487 * @force: connector force to get name of
489 * Returns: const pointer to name.
491 const char *drm_get_connector_force_name(enum drm_connector_force force)
494 case DRM_FORCE_UNSPECIFIED:
495 return "unspecified";
500 case DRM_FORCE_ON_DIGITAL:
507 #ifdef CONFIG_LOCKDEP
508 static struct lockdep_map connector_list_iter_dep_map = {
509 .name = "drm_connector_list_iter"
514 * drm_connector_list_iter_begin - initialize a connector_list iterator
516 * @iter: connector_list iterator
518 * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
519 * must always be cleaned up again by calling drm_connector_list_iter_end().
520 * Iteration itself happens using drm_connector_list_iter_next() or
521 * drm_for_each_connector_iter().
523 void drm_connector_list_iter_begin(struct drm_device *dev,
524 struct drm_connector_list_iter *iter)
528 lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
530 EXPORT_SYMBOL(drm_connector_list_iter_begin);
533 * drm_connector_list_iter_next - return next connector
534 * @iter: connectr_list iterator
536 * Returns the next connector for @iter, or NULL when the list walk has
539 struct drm_connector *
540 drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
542 struct drm_connector *old_conn = iter->conn;
543 struct drm_mode_config *config = &iter->dev->mode_config;
544 struct list_head *lhead;
547 spin_lock_irqsave(&config->connector_list_lock, flags);
548 lhead = old_conn ? &old_conn->head : &config->connector_list;
551 if (lhead->next == &config->connector_list) {
557 iter->conn = list_entry(lhead, struct drm_connector, head);
559 /* loop until it's not a zombie connector */
560 } while (!kref_get_unless_zero(&iter->conn->base.refcount));
561 spin_unlock_irqrestore(&config->connector_list_lock, flags);
564 drm_connector_put(old_conn);
568 EXPORT_SYMBOL(drm_connector_list_iter_next);
571 * drm_connector_list_iter_end - tear down a connector_list iterator
572 * @iter: connector_list iterator
574 * Tears down @iter and releases any resources (like &drm_connector references)
575 * acquired while walking the list. This must always be called, both when the
576 * iteration completes fully or when it was aborted without walking the entire
579 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
583 drm_connector_put(iter->conn);
584 lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
586 EXPORT_SYMBOL(drm_connector_list_iter_end);
588 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
589 { SubPixelUnknown, "Unknown" },
590 { SubPixelHorizontalRGB, "Horizontal RGB" },
591 { SubPixelHorizontalBGR, "Horizontal BGR" },
592 { SubPixelVerticalRGB, "Vertical RGB" },
593 { SubPixelVerticalBGR, "Vertical BGR" },
594 { SubPixelNone, "None" },
598 * drm_get_subpixel_order_name - return a string for a given subpixel enum
599 * @order: enum of subpixel_order
601 * Note you could abuse this and return something out of bounds, but that
602 * would be a caller error. No unscrubbed user data should make it here.
604 const char *drm_get_subpixel_order_name(enum subpixel_order order)
606 return drm_subpixel_enum_list[order].name;
608 EXPORT_SYMBOL(drm_get_subpixel_order_name);
610 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
611 { DRM_MODE_DPMS_ON, "On" },
612 { DRM_MODE_DPMS_STANDBY, "Standby" },
613 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
614 { DRM_MODE_DPMS_OFF, "Off" }
616 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
618 static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
619 { DRM_MODE_LINK_STATUS_GOOD, "Good" },
620 { DRM_MODE_LINK_STATUS_BAD, "Bad" },
624 * drm_display_info_set_bus_formats - set the supported bus formats
625 * @info: display info to store bus formats in
626 * @formats: array containing the supported bus formats
627 * @num_formats: the number of entries in the fmts array
629 * Store the supported bus formats in display info structure.
630 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
631 * a full list of available formats.
633 int drm_display_info_set_bus_formats(struct drm_display_info *info,
635 unsigned int num_formats)
639 if (!formats && num_formats)
642 if (formats && num_formats) {
643 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
649 kfree(info->bus_formats);
650 info->bus_formats = fmts;
651 info->num_bus_formats = num_formats;
655 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
657 /* Optional connector properties. */
658 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
659 { DRM_MODE_SCALE_NONE, "None" },
660 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
661 { DRM_MODE_SCALE_CENTER, "Center" },
662 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
665 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
666 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
667 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
668 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
671 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
672 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
673 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
674 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
676 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
678 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
679 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
680 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
681 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
683 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
684 drm_dvi_i_subconnector_enum_list)
686 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
687 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
688 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
689 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
690 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
691 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
693 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
695 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
696 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
697 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
698 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
699 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
700 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
702 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
703 drm_tv_subconnector_enum_list)
706 * DOC: standard connector properties
708 * DRM connectors have a few standardized properties:
711 * Blob property which contains the current EDID read from the sink. This
712 * is useful to parse sink identification information like vendor, model
713 * and serial. Drivers should update this property by calling
714 * drm_mode_connector_update_edid_property(), usually after having parsed
715 * the EDID using drm_add_edid_modes(). Userspace cannot change this
718 * Legacy property for setting the power state of the connector. For atomic
719 * drivers this is only provided for backwards compatibility with existing
720 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
721 * connector is linked to. Drivers should never set this property directly,
722 * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
723 * callback. For atomic drivers the remapping to the "ACTIVE" property is
724 * implemented in the DRM core. This is the only standard connector
725 * property that userspace can change.
727 * Note that this property cannot be set through the MODE_ATOMIC ioctl,
728 * userspace must use "ACTIVE" on the CRTC instead.
732 * For userspace also running on legacy drivers the "DPMS" semantics are a
733 * lot more complicated. First, userspace cannot rely on the "DPMS" value
734 * returned by the GETCONNECTOR actually reflecting reality, because many
735 * drivers fail to update it. For atomic drivers this is taken care of in
736 * drm_atomic_helper_update_legacy_modeset_state().
738 * The second issue is that the DPMS state is only well-defined when the
739 * connector is connected to a CRTC. In atomic the DRM core enforces that
740 * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
742 * Finally, when enabling an output using the legacy SETCONFIG ioctl then
743 * "DPMS" is forced to ON. But see above, that might not be reflected in
744 * the software value on legacy drivers.
746 * Summarizing: Only set "DPMS" when the connector is known to be enabled,
747 * assume that a successful SETCONFIG call also sets "DPMS" to on, and
748 * never read back the value of "DPMS" because it can be incorrect.
750 * Connector path property to identify how this sink is physically
751 * connected. Used by DP MST. This should be set by calling
752 * drm_mode_connector_set_path_property(), in the case of DP MST with the
753 * path property the MST manager created. Userspace cannot change this
756 * Connector tile group property to indicate how a set of DRM connector
757 * compose together into one logical screen. This is used by both high-res
758 * external screens (often only using a single cable, but exposing multiple
759 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
760 * are not gen-locked. Note that for tiled panels which are genlocked, like
761 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
762 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
763 * should update this value using drm_mode_connector_set_tile_property().
764 * Userspace cannot change this property.
766 * Connector link-status property to indicate the status of link. The default
767 * value of link-status is "GOOD". If something fails during or after modeset,
768 * the kernel driver may set this to "BAD" and issue a hotplug uevent. Drivers
769 * should update this value using drm_mode_connector_set_link_status_property().
771 * Indicates the output should be ignored for purposes of displaying a
772 * standard desktop environment or console. This is most likely because
773 * the output device is not rectilinear.
775 * Connectors also have one standardized atomic property:
778 * Mode object ID of the &drm_crtc this connector should be connected to.
781 int drm_connector_create_standard_properties(struct drm_device *dev)
783 struct drm_property *prop;
785 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
786 DRM_MODE_PROP_IMMUTABLE,
790 dev->mode_config.edid_property = prop;
792 prop = drm_property_create_enum(dev, 0,
793 "DPMS", drm_dpms_enum_list,
794 ARRAY_SIZE(drm_dpms_enum_list));
797 dev->mode_config.dpms_property = prop;
799 prop = drm_property_create(dev,
801 DRM_MODE_PROP_IMMUTABLE,
805 dev->mode_config.path_property = prop;
807 prop = drm_property_create(dev,
809 DRM_MODE_PROP_IMMUTABLE,
813 dev->mode_config.tile_property = prop;
815 prop = drm_property_create_enum(dev, 0, "link-status",
816 drm_link_status_enum_list,
817 ARRAY_SIZE(drm_link_status_enum_list));
820 dev->mode_config.link_status_property = prop;
822 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
825 dev->mode_config.non_desktop_property = prop;
831 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
834 * Called by a driver the first time a DVI-I connector is made.
836 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
838 struct drm_property *dvi_i_selector;
839 struct drm_property *dvi_i_subconnector;
841 if (dev->mode_config.dvi_i_select_subconnector_property)
845 drm_property_create_enum(dev, 0,
846 "select subconnector",
847 drm_dvi_i_select_enum_list,
848 ARRAY_SIZE(drm_dvi_i_select_enum_list));
849 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
851 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
853 drm_dvi_i_subconnector_enum_list,
854 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
855 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
859 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
862 * drm_create_tv_properties - create TV specific connector properties
864 * @num_modes: number of different TV formats (modes) supported
865 * @modes: array of pointers to strings containing name of each format
867 * Called by a driver's TV initialization routine, this function creates
868 * the TV specific connector properties for a given device. Caller is
869 * responsible for allocating a list of format names and passing them to
872 int drm_mode_create_tv_properties(struct drm_device *dev,
873 unsigned int num_modes,
874 const char * const modes[])
876 struct drm_property *tv_selector;
877 struct drm_property *tv_subconnector;
880 if (dev->mode_config.tv_select_subconnector_property)
884 * Basic connector properties
886 tv_selector = drm_property_create_enum(dev, 0,
887 "select subconnector",
888 drm_tv_select_enum_list,
889 ARRAY_SIZE(drm_tv_select_enum_list));
893 dev->mode_config.tv_select_subconnector_property = tv_selector;
896 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
898 drm_tv_subconnector_enum_list,
899 ARRAY_SIZE(drm_tv_subconnector_enum_list));
900 if (!tv_subconnector)
902 dev->mode_config.tv_subconnector_property = tv_subconnector;
905 * Other, TV specific properties: margins & TV modes.
907 dev->mode_config.tv_left_margin_property =
908 drm_property_create_range(dev, 0, "left margin", 0, 100);
909 if (!dev->mode_config.tv_left_margin_property)
912 dev->mode_config.tv_right_margin_property =
913 drm_property_create_range(dev, 0, "right margin", 0, 100);
914 if (!dev->mode_config.tv_right_margin_property)
917 dev->mode_config.tv_top_margin_property =
918 drm_property_create_range(dev, 0, "top margin", 0, 100);
919 if (!dev->mode_config.tv_top_margin_property)
922 dev->mode_config.tv_bottom_margin_property =
923 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
924 if (!dev->mode_config.tv_bottom_margin_property)
927 dev->mode_config.tv_mode_property =
928 drm_property_create(dev, DRM_MODE_PROP_ENUM,
930 if (!dev->mode_config.tv_mode_property)
933 for (i = 0; i < num_modes; i++)
934 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
937 dev->mode_config.tv_brightness_property =
938 drm_property_create_range(dev, 0, "brightness", 0, 100);
939 if (!dev->mode_config.tv_brightness_property)
942 dev->mode_config.tv_contrast_property =
943 drm_property_create_range(dev, 0, "contrast", 0, 100);
944 if (!dev->mode_config.tv_contrast_property)
947 dev->mode_config.tv_flicker_reduction_property =
948 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
949 if (!dev->mode_config.tv_flicker_reduction_property)
952 dev->mode_config.tv_overscan_property =
953 drm_property_create_range(dev, 0, "overscan", 0, 100);
954 if (!dev->mode_config.tv_overscan_property)
957 dev->mode_config.tv_saturation_property =
958 drm_property_create_range(dev, 0, "saturation", 0, 100);
959 if (!dev->mode_config.tv_saturation_property)
962 dev->mode_config.tv_hue_property =
963 drm_property_create_range(dev, 0, "hue", 0, 100);
964 if (!dev->mode_config.tv_hue_property)
971 EXPORT_SYMBOL(drm_mode_create_tv_properties);
974 * drm_mode_create_scaling_mode_property - create scaling mode property
977 * Called by a driver the first time it's needed, must be attached to desired
980 * Atomic drivers should use drm_connector_attach_scaling_mode_property()
981 * instead to correctly assign &drm_connector_state.picture_aspect_ratio
982 * in the atomic state.
984 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
986 struct drm_property *scaling_mode;
988 if (dev->mode_config.scaling_mode_property)
992 drm_property_create_enum(dev, 0, "scaling mode",
993 drm_scaling_mode_enum_list,
994 ARRAY_SIZE(drm_scaling_mode_enum_list));
996 dev->mode_config.scaling_mode_property = scaling_mode;
1000 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1003 * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1004 * @connector: connector to attach scaling mode property on.
1005 * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1007 * This is used to add support for scaling mode to atomic drivers.
1008 * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
1009 * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1011 * This is the atomic version of drm_mode_create_scaling_mode_property().
1014 * Zero on success, negative errno on failure.
1016 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1017 u32 scaling_mode_mask)
1019 struct drm_device *dev = connector->dev;
1020 struct drm_property *scaling_mode_property;
1022 const unsigned valid_scaling_mode_mask =
1023 (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1025 if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
1026 scaling_mode_mask & ~valid_scaling_mode_mask))
1029 scaling_mode_property =
1030 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1031 hweight32(scaling_mode_mask));
1033 if (!scaling_mode_property)
1036 for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1039 if (!(BIT(i) & scaling_mode_mask))
1042 ret = drm_property_add_enum(scaling_mode_property, j++,
1043 drm_scaling_mode_enum_list[i].type,
1044 drm_scaling_mode_enum_list[i].name);
1047 drm_property_destroy(dev, scaling_mode_property);
1053 drm_object_attach_property(&connector->base,
1054 scaling_mode_property, 0);
1056 connector->scaling_mode_property = scaling_mode_property;
1060 EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1063 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1066 * Called by a driver the first time it's needed, must be attached to desired
1070 * Zero on success, negative errno on failure.
1072 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1074 if (dev->mode_config.aspect_ratio_property)
1077 dev->mode_config.aspect_ratio_property =
1078 drm_property_create_enum(dev, 0, "aspect ratio",
1079 drm_aspect_ratio_enum_list,
1080 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1082 if (dev->mode_config.aspect_ratio_property == NULL)
1087 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1090 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1093 * Create the the suggested x/y offset property for connectors.
1095 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1097 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1100 dev->mode_config.suggested_x_property =
1101 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1103 dev->mode_config.suggested_y_property =
1104 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1106 if (dev->mode_config.suggested_x_property == NULL ||
1107 dev->mode_config.suggested_y_property == NULL)
1111 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1114 * drm_mode_connector_set_path_property - set tile property on connector
1115 * @connector: connector to set property on.
1116 * @path: path to use for property; must not be NULL.
1118 * This creates a property to expose to userspace to specify a
1119 * connector path. This is mainly used for DisplayPort MST where
1120 * connectors have a topology and we want to allow userspace to give
1121 * them more meaningful names.
1124 * Zero on success, negative errno on failure.
1126 int drm_mode_connector_set_path_property(struct drm_connector *connector,
1129 struct drm_device *dev = connector->dev;
1132 ret = drm_property_replace_global_blob(dev,
1133 &connector->path_blob_ptr,
1137 dev->mode_config.path_property);
1140 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
1143 * drm_mode_connector_set_tile_property - set tile property on connector
1144 * @connector: connector to set property on.
1146 * This looks up the tile information for a connector, and creates a
1147 * property for userspace to parse if it exists. The property is of
1148 * the form of 8 integers using ':' as a separator.
1151 * Zero on success, errno on failure.
1153 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
1155 struct drm_device *dev = connector->dev;
1159 if (!connector->has_tile) {
1160 ret = drm_property_replace_global_blob(dev,
1161 &connector->tile_blob_ptr,
1165 dev->mode_config.tile_property);
1169 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
1170 connector->tile_group->id, connector->tile_is_single_monitor,
1171 connector->num_h_tile, connector->num_v_tile,
1172 connector->tile_h_loc, connector->tile_v_loc,
1173 connector->tile_h_size, connector->tile_v_size);
1175 ret = drm_property_replace_global_blob(dev,
1176 &connector->tile_blob_ptr,
1180 dev->mode_config.tile_property);
1183 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
1186 * drm_mode_connector_update_edid_property - update the edid property of a connector
1187 * @connector: drm connector
1188 * @edid: new value of the edid property
1190 * This function creates a new blob modeset object and assigns its id to the
1191 * connector's edid property.
1194 * Zero on success, negative errno on failure.
1196 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
1197 const struct edid *edid)
1199 struct drm_device *dev = connector->dev;
1203 /* ignore requests to set edid when overridden */
1204 if (connector->override_edid)
1208 size = EDID_LENGTH * (1 + edid->extensions);
1210 drm_object_property_set_value(&connector->base,
1211 dev->mode_config.non_desktop_property,
1212 connector->display_info.non_desktop);
1214 ret = drm_property_replace_global_blob(dev,
1215 &connector->edid_blob_ptr,
1219 dev->mode_config.edid_property);
1222 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
1225 * drm_mode_connector_set_link_status_property - Set link status property of a connector
1226 * @connector: drm connector
1227 * @link_status: new value of link status property (0: Good, 1: Bad)
1229 * In usual working scenario, this link status property will always be set to
1230 * "GOOD". If something fails during or after a mode set, the kernel driver
1231 * may set this link status property to "BAD". The caller then needs to send a
1232 * hotplug uevent for userspace to re-check the valid modes through
1233 * GET_CONNECTOR_IOCTL and retry modeset.
1235 * Note: Drivers cannot rely on userspace to support this property and
1236 * issue a modeset. As such, they may choose to handle issues (like
1237 * re-training a link) without userspace's intervention.
1239 * The reason for adding this property is to handle link training failures, but
1240 * it is not limited to DP or link training. For example, if we implement
1241 * asynchronous setcrtc, this property can be used to report any failures in that.
1243 void drm_mode_connector_set_link_status_property(struct drm_connector *connector,
1244 uint64_t link_status)
1246 struct drm_device *dev = connector->dev;
1248 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1249 connector->state->link_status = link_status;
1250 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1252 EXPORT_SYMBOL(drm_mode_connector_set_link_status_property);
1254 int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
1255 struct drm_property *property,
1259 struct drm_connector *connector = obj_to_connector(obj);
1261 /* Do DPMS ourselves */
1262 if (property == connector->dev->mode_config.dpms_property) {
1263 ret = (*connector->funcs->dpms)(connector, (int)value);
1264 } else if (connector->funcs->set_property)
1265 ret = connector->funcs->set_property(connector, property, value);
1268 drm_object_property_set_value(&connector->base, property, value);
1272 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
1273 void *data, struct drm_file *file_priv)
1275 struct drm_mode_connector_set_property *conn_set_prop = data;
1276 struct drm_mode_obj_set_property obj_set_prop = {
1277 .value = conn_set_prop->value,
1278 .prop_id = conn_set_prop->prop_id,
1279 .obj_id = conn_set_prop->connector_id,
1280 .obj_type = DRM_MODE_OBJECT_CONNECTOR
1283 /* It does all the locking and checking we need */
1284 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
1287 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1289 /* For atomic drivers only state objects are synchronously updated and
1290 * protected by modeset locks, so check those first. */
1291 if (connector->state)
1292 return connector->state->best_encoder;
1293 return connector->encoder;
1296 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1297 const struct drm_file *file_priv)
1300 * If user-space hasn't configured the driver to expose the stereo 3D
1301 * modes, don't expose them.
1303 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1309 int drm_mode_getconnector(struct drm_device *dev, void *data,
1310 struct drm_file *file_priv)
1312 struct drm_mode_get_connector *out_resp = data;
1313 struct drm_connector *connector;
1314 struct drm_encoder *encoder;
1315 struct drm_display_mode *mode;
1317 int encoders_count = 0;
1321 struct drm_mode_modeinfo u_mode;
1322 struct drm_mode_modeinfo __user *mode_ptr;
1323 uint32_t __user *encoder_ptr;
1325 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1328 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1330 connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
1334 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1335 if (connector->encoder_ids[i] != 0)
1338 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1340 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1341 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1342 if (connector->encoder_ids[i] != 0) {
1343 if (put_user(connector->encoder_ids[i],
1344 encoder_ptr + copied)) {
1352 out_resp->count_encoders = encoders_count;
1354 out_resp->connector_id = connector->base.id;
1355 out_resp->connector_type = connector->connector_type;
1356 out_resp->connector_type_id = connector->connector_type_id;
1358 mutex_lock(&dev->mode_config.mutex);
1359 if (out_resp->count_modes == 0) {
1360 connector->funcs->fill_modes(connector,
1361 dev->mode_config.max_width,
1362 dev->mode_config.max_height);
1365 out_resp->mm_width = connector->display_info.width_mm;
1366 out_resp->mm_height = connector->display_info.height_mm;
1367 out_resp->subpixel = connector->display_info.subpixel_order;
1368 out_resp->connection = connector->status;
1370 /* delayed so we get modes regardless of pre-fill_modes state */
1371 list_for_each_entry(mode, &connector->modes, head)
1372 if (drm_mode_expose_to_userspace(mode, file_priv))
1376 * This ioctl is called twice, once to determine how much space is
1377 * needed, and the 2nd time to fill it.
1379 if ((out_resp->count_modes >= mode_count) && mode_count) {
1381 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1382 list_for_each_entry(mode, &connector->modes, head) {
1383 if (!drm_mode_expose_to_userspace(mode, file_priv))
1386 drm_mode_convert_to_umode(&u_mode, mode);
1387 if (copy_to_user(mode_ptr + copied,
1388 &u_mode, sizeof(u_mode))) {
1390 mutex_unlock(&dev->mode_config.mutex);
1397 out_resp->count_modes = mode_count;
1398 mutex_unlock(&dev->mode_config.mutex);
1400 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1401 encoder = drm_connector_get_encoder(connector);
1403 out_resp->encoder_id = encoder->base.id;
1405 out_resp->encoder_id = 0;
1407 /* Only grab properties after probing, to make sure EDID and other
1408 * properties reflect the latest status. */
1409 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1410 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1411 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1412 &out_resp->count_props);
1413 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1416 drm_connector_put(connector);
1425 * Tile groups are used to represent tiled monitors with a unique integer
1426 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
1427 * we store this in a tile group, so we have a common identifier for all tiles
1428 * in a monitor group. The property is called "TILE". Drivers can manage tile
1429 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
1430 * drm_mode_get_tile_group(). But this is only needed for internal panels where
1431 * the tile group information is exposed through a non-standard way.
1434 static void drm_tile_group_free(struct kref *kref)
1436 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
1437 struct drm_device *dev = tg->dev;
1438 mutex_lock(&dev->mode_config.idr_mutex);
1439 idr_remove(&dev->mode_config.tile_idr, tg->id);
1440 mutex_unlock(&dev->mode_config.idr_mutex);
1445 * drm_mode_put_tile_group - drop a reference to a tile group.
1447 * @tg: tile group to drop reference to.
1449 * drop reference to tile group and free if 0.
1451 void drm_mode_put_tile_group(struct drm_device *dev,
1452 struct drm_tile_group *tg)
1454 kref_put(&tg->refcount, drm_tile_group_free);
1456 EXPORT_SYMBOL(drm_mode_put_tile_group);
1459 * drm_mode_get_tile_group - get a reference to an existing tile group
1461 * @topology: 8-bytes unique per monitor.
1463 * Use the unique bytes to get a reference to an existing tile group.
1466 * tile group or NULL if not found.
1468 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1471 struct drm_tile_group *tg;
1473 mutex_lock(&dev->mode_config.idr_mutex);
1474 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
1475 if (!memcmp(tg->group_data, topology, 8)) {
1476 if (!kref_get_unless_zero(&tg->refcount))
1478 mutex_unlock(&dev->mode_config.idr_mutex);
1482 mutex_unlock(&dev->mode_config.idr_mutex);
1485 EXPORT_SYMBOL(drm_mode_get_tile_group);
1488 * drm_mode_create_tile_group - create a tile group from a displayid description
1490 * @topology: 8-bytes unique per monitor.
1492 * Create a tile group for the unique monitor, and get a unique
1493 * identifier for the tile group.
1496 * new tile group or error.
1498 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1501 struct drm_tile_group *tg;
1504 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
1506 return ERR_PTR(-ENOMEM);
1508 kref_init(&tg->refcount);
1509 memcpy(tg->group_data, topology, 8);
1512 mutex_lock(&dev->mode_config.idr_mutex);
1513 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
1521 mutex_unlock(&dev->mode_config.idr_mutex);
1524 EXPORT_SYMBOL(drm_mode_create_tile_group);