2 * Copyright (c) 2016 Intel Corporation
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 #include <drm/drm_connector.h>
25 #include <drm/drm_edid.h>
26 #include <drm/drm_encoder.h>
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_reference() and
39 * drm_connector_unreference().
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.
45 * The connector is then registered with a call to drm_connector_init() with a
46 * pointer to the connector functions and a connector type, and exposed through
47 * sysfs 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 struct &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,
134 switch (mode->force) {
138 case DRM_FORCE_ON_DIGITAL:
147 DRM_INFO("forcing %s connector %s\n", connector->name, s);
148 connector->force = mode->force;
151 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
153 mode->xres, mode->yres,
154 mode->refresh_specified ? mode->refresh : 60,
155 mode->rb ? " reduced blanking" : "",
156 mode->margins ? " with margins" : "",
157 mode->interlace ? " interlaced" : "");
160 static void drm_connector_free(struct kref *kref)
162 struct drm_connector *connector =
163 container_of(kref, struct drm_connector, base.refcount);
164 struct drm_device *dev = connector->dev;
166 drm_mode_object_unregister(dev, &connector->base);
167 connector->funcs->destroy(connector);
171 * drm_connector_init - Init a preallocated connector
173 * @connector: the connector to init
174 * @funcs: callbacks for this connector
175 * @connector_type: user visible type of the connector
177 * Initialises a preallocated connector. Connectors should be
178 * subclassed as part of driver connector objects.
181 * Zero on success, error code on failure.
183 int drm_connector_init(struct drm_device *dev,
184 struct drm_connector *connector,
185 const struct drm_connector_funcs *funcs,
188 struct drm_mode_config *config = &dev->mode_config;
190 struct ida *connector_ida =
191 &drm_connector_enum_list[connector_type].ida;
193 drm_modeset_lock_all(dev);
195 ret = drm_mode_object_get_reg(dev, &connector->base,
196 DRM_MODE_OBJECT_CONNECTOR,
197 false, drm_connector_free);
201 connector->base.properties = &connector->properties;
202 connector->dev = dev;
203 connector->funcs = funcs;
205 ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
208 connector->index = ret;
211 connector->connector_type = connector_type;
212 connector->connector_type_id =
213 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
214 if (connector->connector_type_id < 0) {
215 ret = connector->connector_type_id;
219 kasprintf(GFP_KERNEL, "%s-%d",
220 drm_connector_enum_list[connector_type].name,
221 connector->connector_type_id);
222 if (!connector->name) {
224 goto out_put_type_id;
227 INIT_LIST_HEAD(&connector->probed_modes);
228 INIT_LIST_HEAD(&connector->modes);
229 connector->edid_blob_ptr = NULL;
230 connector->status = connector_status_unknown;
232 drm_connector_get_cmdline_mode(connector);
234 /* We should add connectors at the end to avoid upsetting the connector
236 list_add_tail(&connector->head, &config->connector_list);
237 config->num_connector++;
239 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
240 drm_object_attach_property(&connector->base,
241 config->edid_property,
244 drm_object_attach_property(&connector->base,
245 config->dpms_property, 0);
247 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
248 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
251 connector->debugfs_entry = NULL;
254 ida_simple_remove(connector_ida, connector->connector_type_id);
257 ida_simple_remove(&config->connector_ida, connector->index);
260 drm_mode_object_unregister(dev, &connector->base);
263 drm_modeset_unlock_all(dev);
267 EXPORT_SYMBOL(drm_connector_init);
270 * drm_mode_connector_attach_encoder - attach a connector to an encoder
271 * @connector: connector to attach
272 * @encoder: encoder to attach @connector to
274 * This function links up a connector to an encoder. Note that the routing
275 * restrictions between encoders and crtcs are exposed to userspace through the
276 * possible_clones and possible_crtcs bitmasks.
279 * Zero on success, negative errno on failure.
281 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
282 struct drm_encoder *encoder)
287 * In the past, drivers have attempted to model the static association
288 * of connector to encoder in simple connector/encoder devices using a
289 * direct assignment of connector->encoder = encoder. This connection
290 * is a logical one and the responsibility of the core, so drivers are
291 * expected not to mess with this.
293 * Note that the error return should've been enough here, but a large
294 * majority of drivers ignores the return value, so add in a big WARN
295 * to get people's attention.
297 if (WARN_ON(connector->encoder))
300 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
301 if (connector->encoder_ids[i] == 0) {
302 connector->encoder_ids[i] = encoder->base.id;
308 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
310 static void drm_mode_remove(struct drm_connector *connector,
311 struct drm_display_mode *mode)
313 list_del(&mode->head);
314 drm_mode_destroy(connector->dev, mode);
318 * drm_connector_cleanup - cleans up an initialised connector
319 * @connector: connector to cleanup
321 * Cleans up the connector but doesn't free the object.
323 void drm_connector_cleanup(struct drm_connector *connector)
325 struct drm_device *dev = connector->dev;
326 struct drm_display_mode *mode, *t;
328 /* The connector should have been removed from userspace long before
329 * it is finally destroyed.
331 if (WARN_ON(connector->registered))
332 drm_connector_unregister(connector);
334 if (connector->tile_group) {
335 drm_mode_put_tile_group(dev, connector->tile_group);
336 connector->tile_group = NULL;
339 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
340 drm_mode_remove(connector, mode);
342 list_for_each_entry_safe(mode, t, &connector->modes, head)
343 drm_mode_remove(connector, mode);
345 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
346 connector->connector_type_id);
348 ida_simple_remove(&dev->mode_config.connector_ida,
351 kfree(connector->display_info.bus_formats);
352 drm_mode_object_unregister(dev, &connector->base);
353 kfree(connector->name);
354 connector->name = NULL;
355 list_del(&connector->head);
356 dev->mode_config.num_connector--;
358 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
359 if (connector->state && connector->funcs->atomic_destroy_state)
360 connector->funcs->atomic_destroy_state(connector,
363 memset(connector, 0, sizeof(*connector));
365 EXPORT_SYMBOL(drm_connector_cleanup);
368 * drm_connector_register - register a connector
369 * @connector: the connector to register
371 * Register userspace interfaces for a connector
374 * Zero on success, error code on failure.
376 int drm_connector_register(struct drm_connector *connector)
380 if (connector->registered)
383 ret = drm_sysfs_connector_add(connector);
387 ret = drm_debugfs_connector_add(connector);
392 if (connector->funcs->late_register) {
393 ret = connector->funcs->late_register(connector);
398 drm_mode_object_register(connector->dev, &connector->base);
400 connector->registered = true;
404 drm_debugfs_connector_remove(connector);
406 drm_sysfs_connector_remove(connector);
409 EXPORT_SYMBOL(drm_connector_register);
412 * drm_connector_unregister - unregister a connector
413 * @connector: the connector to unregister
415 * Unregister userspace interfaces for a connector
417 void drm_connector_unregister(struct drm_connector *connector)
419 if (!connector->registered)
422 if (connector->funcs->early_unregister)
423 connector->funcs->early_unregister(connector);
425 drm_sysfs_connector_remove(connector);
426 drm_debugfs_connector_remove(connector);
428 connector->registered = false;
430 EXPORT_SYMBOL(drm_connector_unregister);
432 void drm_connector_unregister_all(struct drm_device *dev)
434 struct drm_connector *connector;
436 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
437 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
438 drm_connector_unregister(connector);
441 int drm_connector_register_all(struct drm_device *dev)
443 struct drm_connector *connector;
446 /* FIXME: taking the mode config mutex ends up in a clash with
447 * fbcon/backlight registration */
448 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
449 ret = drm_connector_register(connector);
457 mutex_unlock(&dev->mode_config.mutex);
458 drm_connector_unregister_all(dev);
463 * drm_get_connector_status_name - return a string for connector status
464 * @status: connector status to compute name of
466 * In contrast to the other drm_get_*_name functions this one here returns a
467 * const pointer and hence is threadsafe.
469 const char *drm_get_connector_status_name(enum drm_connector_status status)
471 if (status == connector_status_connected)
473 else if (status == connector_status_disconnected)
474 return "disconnected";
478 EXPORT_SYMBOL(drm_get_connector_status_name);
480 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
481 { SubPixelUnknown, "Unknown" },
482 { SubPixelHorizontalRGB, "Horizontal RGB" },
483 { SubPixelHorizontalBGR, "Horizontal BGR" },
484 { SubPixelVerticalRGB, "Vertical RGB" },
485 { SubPixelVerticalBGR, "Vertical BGR" },
486 { SubPixelNone, "None" },
490 * drm_get_subpixel_order_name - return a string for a given subpixel enum
491 * @order: enum of subpixel_order
493 * Note you could abuse this and return something out of bounds, but that
494 * would be a caller error. No unscrubbed user data should make it here.
496 const char *drm_get_subpixel_order_name(enum subpixel_order order)
498 return drm_subpixel_enum_list[order].name;
500 EXPORT_SYMBOL(drm_get_subpixel_order_name);
502 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
503 { DRM_MODE_DPMS_ON, "On" },
504 { DRM_MODE_DPMS_STANDBY, "Standby" },
505 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
506 { DRM_MODE_DPMS_OFF, "Off" }
508 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
511 * drm_display_info_set_bus_formats - set the supported bus formats
512 * @info: display info to store bus formats in
513 * @formats: array containing the supported bus formats
514 * @num_formats: the number of entries in the fmts array
516 * Store the supported bus formats in display info structure.
517 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
518 * a full list of available formats.
520 int drm_display_info_set_bus_formats(struct drm_display_info *info,
522 unsigned int num_formats)
526 if (!formats && num_formats)
529 if (formats && num_formats) {
530 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
536 kfree(info->bus_formats);
537 info->bus_formats = fmts;
538 info->num_bus_formats = num_formats;
542 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
544 /* Optional connector properties. */
545 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
546 { DRM_MODE_SCALE_NONE, "None" },
547 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
548 { DRM_MODE_SCALE_CENTER, "Center" },
549 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
552 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
553 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
554 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
555 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
558 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
559 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
560 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
561 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
563 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
565 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
566 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
567 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
568 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
570 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
571 drm_dvi_i_subconnector_enum_list)
573 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
574 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
575 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
576 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
577 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
578 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
580 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
582 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
583 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
584 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
585 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
586 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
587 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
589 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
590 drm_tv_subconnector_enum_list)
593 * DOC: standard connector properties
595 * DRM connectors have a few standardized properties:
598 * Blob property which contains the current EDID read from the sink. This
599 * is useful to parse sink identification information like vendor, model
600 * and serial. Drivers should update this property by calling
601 * drm_mode_connector_update_edid_property(), usually after having parsed
602 * the EDID using drm_add_edid_modes(). Userspace cannot change this
605 * Legacy property for setting the power state of the connector. For atomic
606 * drivers this is only provided for backwards compatibility with existing
607 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
608 * connector is linked to. Drivers should never set this property directly,
609 * it is handled by the DRM core by calling the ->dpms() callback in
610 * &drm_connector_funcs. Atomic drivers should implement this hook using
611 * drm_atomic_helper_connector_dpms(). This is the only property standard
612 * connector property that userspace can change.
614 * Connector path property to identify how this sink is physically
615 * connected. Used by DP MST. This should be set by calling
616 * drm_mode_connector_set_path_property(), in the case of DP MST with the
617 * path property the MST manager created. Userspace cannot change this
620 * Connector tile group property to indicate how a set of DRM connector
621 * compose together into one logical screen. This is used by both high-res
622 * external screens (often only using a single cable, but exposing multiple
623 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
624 * are not gen-locked. Note that for tiled panels which are genlocked, like
625 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
626 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
627 * should update this value using drm_mode_connector_set_tile_property().
628 * Userspace cannot change this property.
630 * Connectors also have one standardized atomic property:
633 * Mode object ID of the &drm_crtc this connector should be connected to.
636 int drm_connector_create_standard_properties(struct drm_device *dev)
638 struct drm_property *prop;
640 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
641 DRM_MODE_PROP_IMMUTABLE,
645 dev->mode_config.edid_property = prop;
647 prop = drm_property_create_enum(dev, 0,
648 "DPMS", drm_dpms_enum_list,
649 ARRAY_SIZE(drm_dpms_enum_list));
652 dev->mode_config.dpms_property = prop;
654 prop = drm_property_create(dev,
656 DRM_MODE_PROP_IMMUTABLE,
660 dev->mode_config.path_property = prop;
662 prop = drm_property_create(dev,
664 DRM_MODE_PROP_IMMUTABLE,
668 dev->mode_config.tile_property = prop;
674 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
677 * Called by a driver the first time a DVI-I connector is made.
679 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
681 struct drm_property *dvi_i_selector;
682 struct drm_property *dvi_i_subconnector;
684 if (dev->mode_config.dvi_i_select_subconnector_property)
688 drm_property_create_enum(dev, 0,
689 "select subconnector",
690 drm_dvi_i_select_enum_list,
691 ARRAY_SIZE(drm_dvi_i_select_enum_list));
692 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
694 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
696 drm_dvi_i_subconnector_enum_list,
697 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
698 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
702 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
705 * drm_create_tv_properties - create TV specific connector properties
707 * @num_modes: number of different TV formats (modes) supported
708 * @modes: array of pointers to strings containing name of each format
710 * Called by a driver's TV initialization routine, this function creates
711 * the TV specific connector properties for a given device. Caller is
712 * responsible for allocating a list of format names and passing them to
715 int drm_mode_create_tv_properties(struct drm_device *dev,
716 unsigned int num_modes,
717 const char * const modes[])
719 struct drm_property *tv_selector;
720 struct drm_property *tv_subconnector;
723 if (dev->mode_config.tv_select_subconnector_property)
727 * Basic connector properties
729 tv_selector = drm_property_create_enum(dev, 0,
730 "select subconnector",
731 drm_tv_select_enum_list,
732 ARRAY_SIZE(drm_tv_select_enum_list));
736 dev->mode_config.tv_select_subconnector_property = tv_selector;
739 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
741 drm_tv_subconnector_enum_list,
742 ARRAY_SIZE(drm_tv_subconnector_enum_list));
743 if (!tv_subconnector)
745 dev->mode_config.tv_subconnector_property = tv_subconnector;
748 * Other, TV specific properties: margins & TV modes.
750 dev->mode_config.tv_left_margin_property =
751 drm_property_create_range(dev, 0, "left margin", 0, 100);
752 if (!dev->mode_config.tv_left_margin_property)
755 dev->mode_config.tv_right_margin_property =
756 drm_property_create_range(dev, 0, "right margin", 0, 100);
757 if (!dev->mode_config.tv_right_margin_property)
760 dev->mode_config.tv_top_margin_property =
761 drm_property_create_range(dev, 0, "top margin", 0, 100);
762 if (!dev->mode_config.tv_top_margin_property)
765 dev->mode_config.tv_bottom_margin_property =
766 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
767 if (!dev->mode_config.tv_bottom_margin_property)
770 dev->mode_config.tv_mode_property =
771 drm_property_create(dev, DRM_MODE_PROP_ENUM,
773 if (!dev->mode_config.tv_mode_property)
776 for (i = 0; i < num_modes; i++)
777 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
780 dev->mode_config.tv_brightness_property =
781 drm_property_create_range(dev, 0, "brightness", 0, 100);
782 if (!dev->mode_config.tv_brightness_property)
785 dev->mode_config.tv_contrast_property =
786 drm_property_create_range(dev, 0, "contrast", 0, 100);
787 if (!dev->mode_config.tv_contrast_property)
790 dev->mode_config.tv_flicker_reduction_property =
791 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
792 if (!dev->mode_config.tv_flicker_reduction_property)
795 dev->mode_config.tv_overscan_property =
796 drm_property_create_range(dev, 0, "overscan", 0, 100);
797 if (!dev->mode_config.tv_overscan_property)
800 dev->mode_config.tv_saturation_property =
801 drm_property_create_range(dev, 0, "saturation", 0, 100);
802 if (!dev->mode_config.tv_saturation_property)
805 dev->mode_config.tv_hue_property =
806 drm_property_create_range(dev, 0, "hue", 0, 100);
807 if (!dev->mode_config.tv_hue_property)
814 EXPORT_SYMBOL(drm_mode_create_tv_properties);
817 * drm_mode_create_scaling_mode_property - create scaling mode property
820 * Called by a driver the first time it's needed, must be attached to desired
823 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
825 struct drm_property *scaling_mode;
827 if (dev->mode_config.scaling_mode_property)
831 drm_property_create_enum(dev, 0, "scaling mode",
832 drm_scaling_mode_enum_list,
833 ARRAY_SIZE(drm_scaling_mode_enum_list));
835 dev->mode_config.scaling_mode_property = scaling_mode;
839 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
842 * drm_mode_create_aspect_ratio_property - create aspect ratio property
845 * Called by a driver the first time it's needed, must be attached to desired
849 * Zero on success, negative errno on failure.
851 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
853 if (dev->mode_config.aspect_ratio_property)
856 dev->mode_config.aspect_ratio_property =
857 drm_property_create_enum(dev, 0, "aspect ratio",
858 drm_aspect_ratio_enum_list,
859 ARRAY_SIZE(drm_aspect_ratio_enum_list));
861 if (dev->mode_config.aspect_ratio_property == NULL)
866 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
869 * drm_mode_create_suggested_offset_properties - create suggests offset properties
872 * Create the the suggested x/y offset property for connectors.
874 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
876 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
879 dev->mode_config.suggested_x_property =
880 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
882 dev->mode_config.suggested_y_property =
883 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
885 if (dev->mode_config.suggested_x_property == NULL ||
886 dev->mode_config.suggested_y_property == NULL)
890 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
893 * drm_mode_connector_set_path_property - set tile property on connector
894 * @connector: connector to set property on.
895 * @path: path to use for property; must not be NULL.
897 * This creates a property to expose to userspace to specify a
898 * connector path. This is mainly used for DisplayPort MST where
899 * connectors have a topology and we want to allow userspace to give
900 * them more meaningful names.
903 * Zero on success, negative errno on failure.
905 int drm_mode_connector_set_path_property(struct drm_connector *connector,
908 struct drm_device *dev = connector->dev;
911 ret = drm_property_replace_global_blob(dev,
912 &connector->path_blob_ptr,
916 dev->mode_config.path_property);
919 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
922 * drm_mode_connector_set_tile_property - set tile property on connector
923 * @connector: connector to set property on.
925 * This looks up the tile information for a connector, and creates a
926 * property for userspace to parse if it exists. The property is of
927 * the form of 8 integers using ':' as a separator.
930 * Zero on success, errno on failure.
932 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
934 struct drm_device *dev = connector->dev;
938 if (!connector->has_tile) {
939 ret = drm_property_replace_global_blob(dev,
940 &connector->tile_blob_ptr,
944 dev->mode_config.tile_property);
948 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
949 connector->tile_group->id, connector->tile_is_single_monitor,
950 connector->num_h_tile, connector->num_v_tile,
951 connector->tile_h_loc, connector->tile_v_loc,
952 connector->tile_h_size, connector->tile_v_size);
954 ret = drm_property_replace_global_blob(dev,
955 &connector->tile_blob_ptr,
959 dev->mode_config.tile_property);
962 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
965 * drm_mode_connector_update_edid_property - update the edid property of a connector
966 * @connector: drm connector
967 * @edid: new value of the edid property
969 * This function creates a new blob modeset object and assigns its id to the
970 * connector's edid property.
973 * Zero on success, negative errno on failure.
975 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
976 const struct edid *edid)
978 struct drm_device *dev = connector->dev;
982 /* ignore requests to set edid when overridden */
983 if (connector->override_edid)
987 size = EDID_LENGTH * (1 + edid->extensions);
989 ret = drm_property_replace_global_blob(dev,
990 &connector->edid_blob_ptr,
994 dev->mode_config.edid_property);
997 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
999 int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
1000 struct drm_property *property,
1004 struct drm_connector *connector = obj_to_connector(obj);
1006 /* Do DPMS ourselves */
1007 if (property == connector->dev->mode_config.dpms_property) {
1008 ret = (*connector->funcs->dpms)(connector, (int)value);
1009 } else if (connector->funcs->set_property)
1010 ret = connector->funcs->set_property(connector, property, value);
1012 /* store the property value if successful */
1014 drm_object_property_set_value(&connector->base, property, value);
1018 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
1019 void *data, struct drm_file *file_priv)
1021 struct drm_mode_connector_set_property *conn_set_prop = data;
1022 struct drm_mode_obj_set_property obj_set_prop = {
1023 .value = conn_set_prop->value,
1024 .prop_id = conn_set_prop->prop_id,
1025 .obj_id = conn_set_prop->connector_id,
1026 .obj_type = DRM_MODE_OBJECT_CONNECTOR
1029 /* It does all the locking and checking we need */
1030 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
1033 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1035 /* For atomic drivers only state objects are synchronously updated and
1036 * protected by modeset locks, so check those first. */
1037 if (connector->state)
1038 return connector->state->best_encoder;
1039 return connector->encoder;
1042 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1043 const struct drm_file *file_priv)
1046 * If user-space hasn't configured the driver to expose the stereo 3D
1047 * modes, don't expose them.
1049 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1055 int drm_mode_getconnector(struct drm_device *dev, void *data,
1056 struct drm_file *file_priv)
1058 struct drm_mode_get_connector *out_resp = data;
1059 struct drm_connector *connector;
1060 struct drm_encoder *encoder;
1061 struct drm_display_mode *mode;
1063 int encoders_count = 0;
1067 struct drm_mode_modeinfo u_mode;
1068 struct drm_mode_modeinfo __user *mode_ptr;
1069 uint32_t __user *encoder_ptr;
1071 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1074 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1076 mutex_lock(&dev->mode_config.mutex);
1078 connector = drm_connector_lookup(dev, out_resp->connector_id);
1084 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1085 if (connector->encoder_ids[i] != 0)
1088 if (out_resp->count_modes == 0) {
1089 connector->funcs->fill_modes(connector,
1090 dev->mode_config.max_width,
1091 dev->mode_config.max_height);
1094 /* delayed so we get modes regardless of pre-fill_modes state */
1095 list_for_each_entry(mode, &connector->modes, head)
1096 if (drm_mode_expose_to_userspace(mode, file_priv))
1099 out_resp->connector_id = connector->base.id;
1100 out_resp->connector_type = connector->connector_type;
1101 out_resp->connector_type_id = connector->connector_type_id;
1102 out_resp->mm_width = connector->display_info.width_mm;
1103 out_resp->mm_height = connector->display_info.height_mm;
1104 out_resp->subpixel = connector->display_info.subpixel_order;
1105 out_resp->connection = connector->status;
1107 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1108 encoder = drm_connector_get_encoder(connector);
1110 out_resp->encoder_id = encoder->base.id;
1112 out_resp->encoder_id = 0;
1115 * This ioctl is called twice, once to determine how much space is
1116 * needed, and the 2nd time to fill it.
1118 if ((out_resp->count_modes >= mode_count) && mode_count) {
1120 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1121 list_for_each_entry(mode, &connector->modes, head) {
1122 if (!drm_mode_expose_to_userspace(mode, file_priv))
1125 drm_mode_convert_to_umode(&u_mode, mode);
1126 if (copy_to_user(mode_ptr + copied,
1127 &u_mode, sizeof(u_mode))) {
1134 out_resp->count_modes = mode_count;
1136 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1137 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1138 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1139 &out_resp->count_props);
1143 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1145 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1146 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1147 if (connector->encoder_ids[i] != 0) {
1148 if (put_user(connector->encoder_ids[i],
1149 encoder_ptr + copied)) {
1157 out_resp->count_encoders = encoders_count;
1160 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1162 drm_connector_unreference(connector);
1164 mutex_unlock(&dev->mode_config.mutex);
1173 * Tile groups are used to represent tiled monitors with a unique integer
1174 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
1175 * we store this in a tile group, so we have a common identifier for all tiles
1176 * in a monitor group. The property is called "TILE". Drivers can manage tile
1177 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
1178 * drm_mode_get_tile_group(). But this is only needed for internal panels where
1179 * the tile group information is exposed through a non-standard way.
1182 static void drm_tile_group_free(struct kref *kref)
1184 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
1185 struct drm_device *dev = tg->dev;
1186 mutex_lock(&dev->mode_config.idr_mutex);
1187 idr_remove(&dev->mode_config.tile_idr, tg->id);
1188 mutex_unlock(&dev->mode_config.idr_mutex);
1193 * drm_mode_put_tile_group - drop a reference to a tile group.
1195 * @tg: tile group to drop reference to.
1197 * drop reference to tile group and free if 0.
1199 void drm_mode_put_tile_group(struct drm_device *dev,
1200 struct drm_tile_group *tg)
1202 kref_put(&tg->refcount, drm_tile_group_free);
1204 EXPORT_SYMBOL(drm_mode_put_tile_group);
1207 * drm_mode_get_tile_group - get a reference to an existing tile group
1209 * @topology: 8-bytes unique per monitor.
1211 * Use the unique bytes to get a reference to an existing tile group.
1214 * tile group or NULL if not found.
1216 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1219 struct drm_tile_group *tg;
1221 mutex_lock(&dev->mode_config.idr_mutex);
1222 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
1223 if (!memcmp(tg->group_data, topology, 8)) {
1224 if (!kref_get_unless_zero(&tg->refcount))
1226 mutex_unlock(&dev->mode_config.idr_mutex);
1230 mutex_unlock(&dev->mode_config.idr_mutex);
1233 EXPORT_SYMBOL(drm_mode_get_tile_group);
1236 * drm_mode_create_tile_group - create a tile group from a displayid description
1238 * @topology: 8-bytes unique per monitor.
1240 * Create a tile group for the unique monitor, and get a unique
1241 * identifier for the tile group.
1244 * new tile group or error.
1246 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1249 struct drm_tile_group *tg;
1252 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
1254 return ERR_PTR(-ENOMEM);
1256 kref_init(&tg->refcount);
1257 memcpy(tg->group_data, topology, 8);
1260 mutex_lock(&dev->mode_config.idr_mutex);
1261 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
1269 mutex_unlock(&dev->mode_config.idr_mutex);
1272 EXPORT_SYMBOL(drm_mode_create_tile_group);