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_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
);