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>
27 #include "drm_crtc_internal.h"
28 #include "drm_internal.h"
33 * In DRM connectors are the general abstraction for display sinks, and include
34 * als fixed panels or anything else that can display pixels in some form. As
35 * opposed to all other KMS objects representing hardware (like CRTC, encoder or
36 * plane abstractions) connectors can be hotplugged and unplugged at runtime.
37 * Hence they are reference-counted using drm_connector_reference() and
38 * drm_connector_unreference().
40 * KMS driver must create, initialize, register and attach at a struct
41 * &drm_connector for each such sink. The instance is created as other KMS
42 * objects and initialized by setting the following fields.
44 * The connector is then registered with a call to drm_connector_init() with a
45 * pointer to the connector functions and a connector type, and exposed through
46 * sysfs 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 struct &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,
133 switch (mode->force) {
137 case DRM_FORCE_ON_DIGITAL:
146 DRM_INFO("forcing %s connector %s\n", connector->name, s);
147 connector->force = mode->force;
150 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
152 mode->xres, mode->yres,
153 mode->refresh_specified ? mode->refresh : 60,
154 mode->rb ? " reduced blanking" : "",
155 mode->margins ? " with margins" : "",
156 mode->interlace ? " interlaced" : "");
159 static void drm_connector_free(struct kref *kref)
161 struct drm_connector *connector =
162 container_of(kref, struct drm_connector, base.refcount);
163 struct drm_device *dev = connector->dev;
165 drm_mode_object_unregister(dev, &connector->base);
166 connector->funcs->destroy(connector);
170 * drm_connector_init - Init a preallocated connector
172 * @connector: the connector to init
173 * @funcs: callbacks for this connector
174 * @connector_type: user visible type of the connector
176 * Initialises a preallocated connector. Connectors should be
177 * subclassed as part of driver connector objects.
180 * Zero on success, error code on failure.
182 int drm_connector_init(struct drm_device *dev,
183 struct drm_connector *connector,
184 const struct drm_connector_funcs *funcs,
187 struct drm_mode_config *config = &dev->mode_config;
189 struct ida *connector_ida =
190 &drm_connector_enum_list[connector_type].ida;
192 drm_modeset_lock_all(dev);
194 ret = drm_mode_object_get_reg(dev, &connector->base,
195 DRM_MODE_OBJECT_CONNECTOR,
196 false, drm_connector_free);
200 connector->base.properties = &connector->properties;
201 connector->dev = dev;
202 connector->funcs = funcs;
204 ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
207 connector->index = ret;
210 connector->connector_type = connector_type;
211 connector->connector_type_id =
212 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
213 if (connector->connector_type_id < 0) {
214 ret = connector->connector_type_id;
218 kasprintf(GFP_KERNEL, "%s-%d",
219 drm_connector_enum_list[connector_type].name,
220 connector->connector_type_id);
221 if (!connector->name) {
223 goto out_put_type_id;
226 INIT_LIST_HEAD(&connector->probed_modes);
227 INIT_LIST_HEAD(&connector->modes);
228 connector->edid_blob_ptr = NULL;
229 connector->status = connector_status_unknown;
231 drm_connector_get_cmdline_mode(connector);
233 /* We should add connectors at the end to avoid upsetting the connector
235 list_add_tail(&connector->head, &config->connector_list);
236 config->num_connector++;
238 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
239 drm_object_attach_property(&connector->base,
240 config->edid_property,
243 drm_object_attach_property(&connector->base,
244 config->dpms_property, 0);
246 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
247 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
250 connector->debugfs_entry = NULL;
253 ida_simple_remove(connector_ida, connector->connector_type_id);
256 ida_simple_remove(&config->connector_ida, connector->index);
259 drm_mode_object_unregister(dev, &connector->base);
262 drm_modeset_unlock_all(dev);
266 EXPORT_SYMBOL(drm_connector_init);
269 * drm_mode_connector_attach_encoder - attach a connector to an encoder
270 * @connector: connector to attach
271 * @encoder: encoder to attach @connector to
273 * This function links up a connector to an encoder. Note that the routing
274 * restrictions between encoders and crtcs are exposed to userspace through the
275 * possible_clones and possible_crtcs bitmasks.
278 * Zero on success, negative errno on failure.
280 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
281 struct drm_encoder *encoder)
286 * In the past, drivers have attempted to model the static association
287 * of connector to encoder in simple connector/encoder devices using a
288 * direct assignment of connector->encoder = encoder. This connection
289 * is a logical one and the responsibility of the core, so drivers are
290 * expected not to mess with this.
292 * Note that the error return should've been enough here, but a large
293 * majority of drivers ignores the return value, so add in a big WARN
294 * to get people's attention.
296 if (WARN_ON(connector->encoder))
299 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
300 if (connector->encoder_ids[i] == 0) {
301 connector->encoder_ids[i] = encoder->base.id;
307 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
309 static void drm_mode_remove(struct drm_connector *connector,
310 struct drm_display_mode *mode)
312 list_del(&mode->head);
313 drm_mode_destroy(connector->dev, mode);
317 * drm_connector_cleanup - cleans up an initialised connector
318 * @connector: connector to cleanup
320 * Cleans up the connector but doesn't free the object.
322 void drm_connector_cleanup(struct drm_connector *connector)
324 struct drm_device *dev = connector->dev;
325 struct drm_display_mode *mode, *t;
327 /* The connector should have been removed from userspace long before
328 * it is finally destroyed.
330 if (WARN_ON(connector->registered))
331 drm_connector_unregister(connector);
333 if (connector->tile_group) {
334 drm_mode_put_tile_group(dev, connector->tile_group);
335 connector->tile_group = NULL;
338 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
339 drm_mode_remove(connector, mode);
341 list_for_each_entry_safe(mode, t, &connector->modes, head)
342 drm_mode_remove(connector, mode);
344 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
345 connector->connector_type_id);
347 ida_simple_remove(&dev->mode_config.connector_ida,
350 kfree(connector->display_info.bus_formats);
351 drm_mode_object_unregister(dev, &connector->base);
352 kfree(connector->name);
353 connector->name = NULL;
354 list_del(&connector->head);
355 dev->mode_config.num_connector--;
357 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
358 if (connector->state && connector->funcs->atomic_destroy_state)
359 connector->funcs->atomic_destroy_state(connector,
362 memset(connector, 0, sizeof(*connector));
364 EXPORT_SYMBOL(drm_connector_cleanup);
367 * drm_connector_register - register a connector
368 * @connector: the connector to register
370 * Register userspace interfaces for a connector
373 * Zero on success, error code on failure.
375 int drm_connector_register(struct drm_connector *connector)
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);
408 EXPORT_SYMBOL(drm_connector_register);
411 * drm_connector_unregister - unregister a connector
412 * @connector: the connector to unregister
414 * Unregister userspace interfaces for a connector
416 void drm_connector_unregister(struct drm_connector *connector)
418 if (!connector->registered)
421 if (connector->funcs->early_unregister)
422 connector->funcs->early_unregister(connector);
424 drm_sysfs_connector_remove(connector);
425 drm_debugfs_connector_remove(connector);
427 connector->registered = false;
429 EXPORT_SYMBOL(drm_connector_unregister);
431 void drm_connector_unregister_all(struct drm_device *dev)
433 struct drm_connector *connector;
435 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
436 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
437 drm_connector_unregister(connector);
440 int drm_connector_register_all(struct drm_device *dev)
442 struct drm_connector *connector;
445 /* FIXME: taking the mode config mutex ends up in a clash with
446 * fbcon/backlight registration */
447 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
448 ret = drm_connector_register(connector);
456 mutex_unlock(&dev->mode_config.mutex);
457 drm_connector_unregister_all(dev);
462 * drm_get_connector_status_name - return a string for connector status
463 * @status: connector status to compute name of
465 * In contrast to the other drm_get_*_name functions this one here returns a
466 * const pointer and hence is threadsafe.
468 const char *drm_get_connector_status_name(enum drm_connector_status status)
470 if (status == connector_status_connected)
472 else if (status == connector_status_disconnected)
473 return "disconnected";
477 EXPORT_SYMBOL(drm_get_connector_status_name);
479 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
480 { SubPixelUnknown, "Unknown" },
481 { SubPixelHorizontalRGB, "Horizontal RGB" },
482 { SubPixelHorizontalBGR, "Horizontal BGR" },
483 { SubPixelVerticalRGB, "Vertical RGB" },
484 { SubPixelVerticalBGR, "Vertical BGR" },
485 { SubPixelNone, "None" },
489 * drm_get_subpixel_order_name - return a string for a given subpixel enum
490 * @order: enum of subpixel_order
492 * Note you could abuse this and return something out of bounds, but that
493 * would be a caller error. No unscrubbed user data should make it here.
495 const char *drm_get_subpixel_order_name(enum subpixel_order order)
497 return drm_subpixel_enum_list[order].name;
499 EXPORT_SYMBOL(drm_get_subpixel_order_name);
501 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
502 { DRM_MODE_DPMS_ON, "On" },
503 { DRM_MODE_DPMS_STANDBY, "Standby" },
504 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
505 { DRM_MODE_DPMS_OFF, "Off" }
507 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
510 * drm_display_info_set_bus_formats - set the supported bus formats
511 * @info: display info to store bus formats in
512 * @formats: array containing the supported bus formats
513 * @num_formats: the number of entries in the fmts array
515 * Store the supported bus formats in display info structure.
516 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
517 * a full list of available formats.
519 int drm_display_info_set_bus_formats(struct drm_display_info *info,
521 unsigned int num_formats)
525 if (!formats && num_formats)
528 if (formats && num_formats) {
529 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
535 kfree(info->bus_formats);
536 info->bus_formats = fmts;
537 info->num_bus_formats = num_formats;
541 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
543 /* Optional connector properties. */
544 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
545 { DRM_MODE_SCALE_NONE, "None" },
546 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
547 { DRM_MODE_SCALE_CENTER, "Center" },
548 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
551 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
552 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
553 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
554 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
557 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
558 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
559 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
560 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
562 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
564 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
565 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
566 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
567 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
569 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
570 drm_dvi_i_subconnector_enum_list)
572 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
573 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
574 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
575 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
576 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
577 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
579 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
581 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
582 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
583 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
584 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
585 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
586 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
588 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
589 drm_tv_subconnector_enum_list)
592 * DOC: standard connector properties
594 * DRM connectors have a few standardized properties:
597 * Blob property which contains the current EDID read from the sink. This
598 * is useful to parse sink identification information like vendor, model
599 * and serial. Drivers should update this property by calling
600 * drm_mode_connector_update_edid_property(), usually after having parsed
601 * the EDID using drm_add_edid_modes(). Userspace cannot change this
604 * Legacy property for setting the power state of the connector. For atomic
605 * drivers this is only provided for backwards compatibility with existing
606 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
607 * connector is linked to. Drivers should never set this property directly,
608 * it is handled by the DRM core by calling the ->dpms() callback in
609 * &drm_connector_funcs. Atomic drivers should implement this hook using
610 * drm_atomic_helper_connector_dpms(). This is the only property standard
611 * connector property that userspace can change.
613 * Connector path property to identify how this sink is physically
614 * connected. Used by DP MST. This should be set by calling
615 * drm_mode_connector_set_path_property(), in the case of DP MST with the
616 * path property the MST manager created. Userspace cannot change this
619 * Connector tile group property to indicate how a set of DRM connector
620 * compose together into one logical screen. This is used by both high-res
621 * external screens (often only using a single cable, but exposing multiple
622 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
623 * are not gen-locked. Note that for tiled panels which are genlocked, like
624 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
625 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
626 * should update this value using drm_mode_connector_set_tile_property().
627 * Userspace cannot change this property.
629 * Connectors also have one standardized atomic property:
632 * Mode object ID of the &drm_crtc this connector should be connected to.
635 int drm_connector_create_standard_properties(struct drm_device *dev)
637 struct drm_property *prop;
639 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
640 DRM_MODE_PROP_IMMUTABLE,
644 dev->mode_config.edid_property = prop;
646 prop = drm_property_create_enum(dev, 0,
647 "DPMS", drm_dpms_enum_list,
648 ARRAY_SIZE(drm_dpms_enum_list));
651 dev->mode_config.dpms_property = prop;
653 prop = drm_property_create(dev,
655 DRM_MODE_PROP_IMMUTABLE,
659 dev->mode_config.path_property = prop;
661 prop = drm_property_create(dev,
663 DRM_MODE_PROP_IMMUTABLE,
667 dev->mode_config.tile_property = prop;
673 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
676 * Called by a driver the first time a DVI-I connector is made.
678 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
680 struct drm_property *dvi_i_selector;
681 struct drm_property *dvi_i_subconnector;
683 if (dev->mode_config.dvi_i_select_subconnector_property)
687 drm_property_create_enum(dev, 0,
688 "select subconnector",
689 drm_dvi_i_select_enum_list,
690 ARRAY_SIZE(drm_dvi_i_select_enum_list));
691 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
693 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
695 drm_dvi_i_subconnector_enum_list,
696 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
697 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
701 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
704 * drm_create_tv_properties - create TV specific connector properties
706 * @num_modes: number of different TV formats (modes) supported
707 * @modes: array of pointers to strings containing name of each format
709 * Called by a driver's TV initialization routine, this function creates
710 * the TV specific connector properties for a given device. Caller is
711 * responsible for allocating a list of format names and passing them to
714 int drm_mode_create_tv_properties(struct drm_device *dev,
715 unsigned int num_modes,
716 const char * const modes[])
718 struct drm_property *tv_selector;
719 struct drm_property *tv_subconnector;
722 if (dev->mode_config.tv_select_subconnector_property)
726 * Basic connector properties
728 tv_selector = drm_property_create_enum(dev, 0,
729 "select subconnector",
730 drm_tv_select_enum_list,
731 ARRAY_SIZE(drm_tv_select_enum_list));
735 dev->mode_config.tv_select_subconnector_property = tv_selector;
738 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
740 drm_tv_subconnector_enum_list,
741 ARRAY_SIZE(drm_tv_subconnector_enum_list));
742 if (!tv_subconnector)
744 dev->mode_config.tv_subconnector_property = tv_subconnector;
747 * Other, TV specific properties: margins & TV modes.
749 dev->mode_config.tv_left_margin_property =
750 drm_property_create_range(dev, 0, "left margin", 0, 100);
751 if (!dev->mode_config.tv_left_margin_property)
754 dev->mode_config.tv_right_margin_property =
755 drm_property_create_range(dev, 0, "right margin", 0, 100);
756 if (!dev->mode_config.tv_right_margin_property)
759 dev->mode_config.tv_top_margin_property =
760 drm_property_create_range(dev, 0, "top margin", 0, 100);
761 if (!dev->mode_config.tv_top_margin_property)
764 dev->mode_config.tv_bottom_margin_property =
765 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
766 if (!dev->mode_config.tv_bottom_margin_property)
769 dev->mode_config.tv_mode_property =
770 drm_property_create(dev, DRM_MODE_PROP_ENUM,
772 if (!dev->mode_config.tv_mode_property)
775 for (i = 0; i < num_modes; i++)
776 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
779 dev->mode_config.tv_brightness_property =
780 drm_property_create_range(dev, 0, "brightness", 0, 100);
781 if (!dev->mode_config.tv_brightness_property)
784 dev->mode_config.tv_contrast_property =
785 drm_property_create_range(dev, 0, "contrast", 0, 100);
786 if (!dev->mode_config.tv_contrast_property)
789 dev->mode_config.tv_flicker_reduction_property =
790 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
791 if (!dev->mode_config.tv_flicker_reduction_property)
794 dev->mode_config.tv_overscan_property =
795 drm_property_create_range(dev, 0, "overscan", 0, 100);
796 if (!dev->mode_config.tv_overscan_property)
799 dev->mode_config.tv_saturation_property =
800 drm_property_create_range(dev, 0, "saturation", 0, 100);
801 if (!dev->mode_config.tv_saturation_property)
804 dev->mode_config.tv_hue_property =
805 drm_property_create_range(dev, 0, "hue", 0, 100);
806 if (!dev->mode_config.tv_hue_property)
813 EXPORT_SYMBOL(drm_mode_create_tv_properties);
816 * drm_mode_create_scaling_mode_property - create scaling mode property
819 * Called by a driver the first time it's needed, must be attached to desired
822 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
824 struct drm_property *scaling_mode;
826 if (dev->mode_config.scaling_mode_property)
830 drm_property_create_enum(dev, 0, "scaling mode",
831 drm_scaling_mode_enum_list,
832 ARRAY_SIZE(drm_scaling_mode_enum_list));
834 dev->mode_config.scaling_mode_property = scaling_mode;
838 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
841 * drm_mode_create_aspect_ratio_property - create aspect ratio property
844 * Called by a driver the first time it's needed, must be attached to desired
848 * Zero on success, negative errno on failure.
850 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
852 if (dev->mode_config.aspect_ratio_property)
855 dev->mode_config.aspect_ratio_property =
856 drm_property_create_enum(dev, 0, "aspect ratio",
857 drm_aspect_ratio_enum_list,
858 ARRAY_SIZE(drm_aspect_ratio_enum_list));
860 if (dev->mode_config.aspect_ratio_property == NULL)
865 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
868 * drm_mode_create_suggested_offset_properties - create suggests offset properties
871 * Create the the suggested x/y offset property for connectors.
873 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
875 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
878 dev->mode_config.suggested_x_property =
879 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
881 dev->mode_config.suggested_y_property =
882 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
884 if (dev->mode_config.suggested_x_property == NULL ||
885 dev->mode_config.suggested_y_property == NULL)
889 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
892 * drm_mode_connector_set_path_property - set tile property on connector
893 * @connector: connector to set property on.
894 * @path: path to use for property; must not be NULL.
896 * This creates a property to expose to userspace to specify a
897 * connector path. This is mainly used for DisplayPort MST where
898 * connectors have a topology and we want to allow userspace to give
899 * them more meaningful names.
902 * Zero on success, negative errno on failure.
904 int drm_mode_connector_set_path_property(struct drm_connector *connector,
907 struct drm_device *dev = connector->dev;
910 ret = drm_property_replace_global_blob(dev,
911 &connector->path_blob_ptr,
915 dev->mode_config.path_property);
918 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
921 * drm_mode_connector_set_tile_property - set tile property on connector
922 * @connector: connector to set property on.
924 * This looks up the tile information for a connector, and creates a
925 * property for userspace to parse if it exists. The property is of
926 * the form of 8 integers using ':' as a separator.
929 * Zero on success, errno on failure.
931 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
933 struct drm_device *dev = connector->dev;
937 if (!connector->has_tile) {
938 ret = drm_property_replace_global_blob(dev,
939 &connector->tile_blob_ptr,
943 dev->mode_config.tile_property);
947 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
948 connector->tile_group->id, connector->tile_is_single_monitor,
949 connector->num_h_tile, connector->num_v_tile,
950 connector->tile_h_loc, connector->tile_v_loc,
951 connector->tile_h_size, connector->tile_v_size);
953 ret = drm_property_replace_global_blob(dev,
954 &connector->tile_blob_ptr,
958 dev->mode_config.tile_property);
961 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
964 * drm_mode_connector_update_edid_property - update the edid property of a connector
965 * @connector: drm connector
966 * @edid: new value of the edid property
968 * This function creates a new blob modeset object and assigns its id to the
969 * connector's edid property.
972 * Zero on success, negative errno on failure.
974 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
975 const struct edid *edid)
977 struct drm_device *dev = connector->dev;
981 /* ignore requests to set edid when overridden */
982 if (connector->override_edid)
986 size = EDID_LENGTH * (1 + edid->extensions);
988 ret = drm_property_replace_global_blob(dev,
989 &connector->edid_blob_ptr,
993 dev->mode_config.edid_property);
996 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
998 int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
999 struct drm_property *property,
1003 struct drm_connector *connector = obj_to_connector(obj);
1005 /* Do DPMS ourselves */
1006 if (property == connector->dev->mode_config.dpms_property) {
1007 ret = (*connector->funcs->dpms)(connector, (int)value);
1008 } else if (connector->funcs->set_property)
1009 ret = connector->funcs->set_property(connector, property, value);
1011 /* store the property value if successful */
1013 drm_object_property_set_value(&connector->base, property, value);
1017 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
1018 void *data, struct drm_file *file_priv)
1020 struct drm_mode_connector_set_property *conn_set_prop = data;
1021 struct drm_mode_obj_set_property obj_set_prop = {
1022 .value = conn_set_prop->value,
1023 .prop_id = conn_set_prop->prop_id,
1024 .obj_id = conn_set_prop->connector_id,
1025 .obj_type = DRM_MODE_OBJECT_CONNECTOR
1028 /* It does all the locking and checking we need */
1029 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
1032 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1034 /* For atomic drivers only state objects are synchronously updated and
1035 * protected by modeset locks, so check those first. */
1036 if (connector->state)
1037 return connector->state->best_encoder;
1038 return connector->encoder;
1041 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1042 const struct drm_file *file_priv)
1045 * If user-space hasn't configured the driver to expose the stereo 3D
1046 * modes, don't expose them.
1048 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1054 int drm_mode_getconnector(struct drm_device *dev, void *data,
1055 struct drm_file *file_priv)
1057 struct drm_mode_get_connector *out_resp = data;
1058 struct drm_connector *connector;
1059 struct drm_encoder *encoder;
1060 struct drm_display_mode *mode;
1062 int encoders_count = 0;
1066 struct drm_mode_modeinfo u_mode;
1067 struct drm_mode_modeinfo __user *mode_ptr;
1068 uint32_t __user *encoder_ptr;
1070 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1073 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1075 mutex_lock(&dev->mode_config.mutex);
1077 connector = drm_connector_lookup(dev, out_resp->connector_id);
1083 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1084 if (connector->encoder_ids[i] != 0)
1087 if (out_resp->count_modes == 0) {
1088 connector->funcs->fill_modes(connector,
1089 dev->mode_config.max_width,
1090 dev->mode_config.max_height);
1093 /* delayed so we get modes regardless of pre-fill_modes state */
1094 list_for_each_entry(mode, &connector->modes, head)
1095 if (drm_mode_expose_to_userspace(mode, file_priv))
1098 out_resp->connector_id = connector->base.id;
1099 out_resp->connector_type = connector->connector_type;
1100 out_resp->connector_type_id = connector->connector_type_id;
1101 out_resp->mm_width = connector->display_info.width_mm;
1102 out_resp->mm_height = connector->display_info.height_mm;
1103 out_resp->subpixel = connector->display_info.subpixel_order;
1104 out_resp->connection = connector->status;
1106 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1107 encoder = drm_connector_get_encoder(connector);
1109 out_resp->encoder_id = encoder->base.id;
1111 out_resp->encoder_id = 0;
1114 * This ioctl is called twice, once to determine how much space is
1115 * needed, and the 2nd time to fill it.
1117 if ((out_resp->count_modes >= mode_count) && mode_count) {
1119 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1120 list_for_each_entry(mode, &connector->modes, head) {
1121 if (!drm_mode_expose_to_userspace(mode, file_priv))
1124 drm_mode_convert_to_umode(&u_mode, mode);
1125 if (copy_to_user(mode_ptr + copied,
1126 &u_mode, sizeof(u_mode))) {
1133 out_resp->count_modes = mode_count;
1135 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1136 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1137 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1138 &out_resp->count_props);
1142 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1144 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1145 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1146 if (connector->encoder_ids[i] != 0) {
1147 if (put_user(connector->encoder_ids[i],
1148 encoder_ptr + copied)) {
1156 out_resp->count_encoders = encoders_count;
1159 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1161 drm_connector_unreference(connector);
1163 mutex_unlock(&dev->mode_config.mutex);
1172 * Tile groups are used to represent tiled monitors with a unique integer
1173 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
1174 * we store this in a tile group, so we have a common identifier for all tiles
1175 * in a monitor group. The property is called "TILE". Drivers can manage tile
1176 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
1177 * drm_mode_get_tile_group(). But this is only needed for internal panels where
1178 * the tile group information is exposed through a non-standard way.
1181 static void drm_tile_group_free(struct kref *kref)
1183 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
1184 struct drm_device *dev = tg->dev;
1185 mutex_lock(&dev->mode_config.idr_mutex);
1186 idr_remove(&dev->mode_config.tile_idr, tg->id);
1187 mutex_unlock(&dev->mode_config.idr_mutex);
1192 * drm_mode_put_tile_group - drop a reference to a tile group.
1194 * @tg: tile group to drop reference to.
1196 * drop reference to tile group and free if 0.
1198 void drm_mode_put_tile_group(struct drm_device *dev,
1199 struct drm_tile_group *tg)
1201 kref_put(&tg->refcount, drm_tile_group_free);
1203 EXPORT_SYMBOL(drm_mode_put_tile_group);
1206 * drm_mode_get_tile_group - get a reference to an existing tile group
1208 * @topology: 8-bytes unique per monitor.
1210 * Use the unique bytes to get a reference to an existing tile group.
1213 * tile group or NULL if not found.
1215 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1218 struct drm_tile_group *tg;
1220 mutex_lock(&dev->mode_config.idr_mutex);
1221 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
1222 if (!memcmp(tg->group_data, topology, 8)) {
1223 if (!kref_get_unless_zero(&tg->refcount))
1225 mutex_unlock(&dev->mode_config.idr_mutex);
1229 mutex_unlock(&dev->mode_config.idr_mutex);
1232 EXPORT_SYMBOL(drm_mode_get_tile_group);
1235 * drm_mode_create_tile_group - create a tile group from a displayid description
1237 * @topology: 8-bytes unique per monitor.
1239 * Create a tile group for the unique monitor, and get a unique
1240 * identifier for the tile group.
1243 * new tile group or error.
1245 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1248 struct drm_tile_group *tg;
1251 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
1253 return ERR_PTR(-ENOMEM);
1255 kref_init(&tg->refcount);
1256 memcpy(tg->group_data, topology, 8);
1259 mutex_lock(&dev->mode_config.idr_mutex);
1260 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
1268 mutex_unlock(&dev->mode_config.idr_mutex);
1271 EXPORT_SYMBOL(drm_mode_create_tile_group);