2 * Copyright (c) 2016 Intel Corporation
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23 #ifndef __DRM_CONNECTOR_H__
24 #define __DRM_CONNECTOR_H__
26 #include <linux/list.h>
27 #include <linux/ctype.h>
28 #include <drm/drm_mode_object.h>
30 #include <uapi/drm/drm_mode.h>
34 struct drm_connector_helper_funcs;
39 struct drm_property_blob;
43 enum drm_connector_force {
44 DRM_FORCE_UNSPECIFIED,
46 DRM_FORCE_ON, /* force on analog part normally */
47 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
51 * enum drm_connector_status - status for a &drm_connector
53 * This enum is used to track the connector status. There are no separate
54 * #defines for the uapi!
56 enum drm_connector_status {
58 * @connector_status_connected: The connector is definitely connected to
59 * a sink device, and can be enabled.
61 connector_status_connected = 1,
63 * @connector_status_disconnected: The connector isn't connected to a
64 * sink device which can be autodetect. For digital outputs like DP or
65 * HDMI (which can be realiable probed) this means there's really
66 * nothing there. It is driver-dependent whether a connector with this
67 * status can be lit up or not.
69 connector_status_disconnected = 2,
71 * @connector_status_unknown: The connector's status could not be
72 * reliably detected. This happens when probing would either cause
73 * flicker (like load-detection when the connector is in use), or when a
74 * hardware resource isn't available (like when load-detection needs a
75 * free CRTC). It should be possible to light up the connector with one
76 * of the listed fallback modes. For default configuration userspace
77 * should only try to light up connectors with unknown status when
78 * there's not connector with @connector_status_connected.
80 connector_status_unknown = 3,
85 SubPixelHorizontalRGB,
86 SubPixelHorizontalBGR,
94 * struct drm_scrambling: sink's scrambling support.
96 struct drm_scrambling {
98 * @supported: scrambling supported for rates > 340 Mhz.
102 * @low_rates: scrambling supported for rates <= 340 Mhz.
108 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink
110 * Provides SCDC register support and capabilities related information on a
111 * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0.
115 * @supported: status control & data channel present.
119 * @read_request: sink is capable of generating scdc read request.
123 * @scrambling: sink's scrambling capabilities
125 struct drm_scrambling scrambling;
130 * struct drm_hdmi_info - runtime information about the connected HDMI sink
132 * Describes if a given display supports advanced HDMI 2.0 features.
133 * This information is available in CEA-861-F extension blocks (like HF-VSDB).
135 struct drm_hdmi_info {
136 /** @scdc: sink's scdc support and capabilities */
137 struct drm_scdc scdc;
141 * enum drm_link_status - connector's link_status property value
143 * This enum is used as the connector's link status property value.
144 * It is set to the values defined in uapi.
146 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful
148 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training
151 enum drm_link_status {
152 DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD,
153 DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD,
157 * struct drm_display_info - runtime data about the connected sink
159 * Describes a given display (e.g. CRT or flat panel) and its limitations. For
160 * fixed display sinks like built-in panels there's not much difference between
161 * this and &struct drm_connector. But for sinks with a real cable this
162 * structure is meant to describe all the things at the other end of the cable.
164 * For sinks which provide an EDID this can be filled out by calling
165 * drm_add_edid_modes().
167 struct drm_display_info {
169 * @name: Name of the display.
171 char name[DRM_DISPLAY_INFO_LEN];
174 * @width_mm: Physical width in mm.
176 unsigned int width_mm;
178 * @height_mm: Physical height in mm.
180 unsigned int height_mm;
183 * @pixel_clock: Maximum pixel clock supported by the sink, in units of
184 * 100Hz. This mismatches the clock in &drm_display_mode (which is in
185 * kHZ), because that's what the EDID uses as base unit.
187 unsigned int pixel_clock;
189 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
194 * @subpixel_order: Subpixel order of LCD panels.
196 enum subpixel_order subpixel_order;
198 #define DRM_COLOR_FORMAT_RGB444 (1<<0)
199 #define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
200 #define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
203 * @color_formats: HDMI Color formats, selects between RGB and YCrCb
204 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
205 * as used to describe the pixel format in framebuffers, and also don't
206 * match the formats in @bus_formats which are shared with v4l.
211 * @bus_formats: Pixel data format on the wire, somewhat redundant with
212 * @color_formats. Array of size @num_bus_formats encoded using
213 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
215 const u32 *bus_formats;
217 * @num_bus_formats: Size of @bus_formats array.
219 unsigned int num_bus_formats;
221 #define DRM_BUS_FLAG_DE_LOW (1<<0)
222 #define DRM_BUS_FLAG_DE_HIGH (1<<1)
223 /* drive data on pos. edge */
224 #define DRM_BUS_FLAG_PIXDATA_POSEDGE (1<<2)
225 /* drive data on neg. edge */
226 #define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3)
227 /* data is transmitted MSB to LSB on the bus */
228 #define DRM_BUS_FLAG_DATA_MSB_TO_LSB (1<<4)
229 /* data is transmitted LSB to MSB on the bus */
230 #define DRM_BUS_FLAG_DATA_LSB_TO_MSB (1<<5)
233 * @bus_flags: Additional information (like pixel signal polarity) for
234 * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines.
239 * @max_tmds_clock: Maximum TMDS clock rate supported by the
240 * sink in kHz. 0 means undefined.
245 * @dvi_dual: Dual-link DVI sink?
250 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
251 * more stuff redundant with @bus_formats.
253 u8 edid_hdmi_dc_modes;
256 * @cea_rev: CEA revision of the HDMI sink.
261 * @hdmi: advance features of a HDMI sink.
263 struct drm_hdmi_info hdmi;
266 int drm_display_info_set_bus_formats(struct drm_display_info *info,
268 unsigned int num_formats);
271 * struct drm_tv_connector_state - TV connector related states
272 * @subconnector: selected subconnector
273 * @margins: left/right/top/bottom margins
275 * @brightness: brightness in percent
276 * @contrast: contrast in percent
277 * @flicker_reduction: flicker reduction in percent
278 * @overscan: overscan in percent
279 * @saturation: saturation in percent
280 * @hue: hue in percent
282 struct drm_tv_connector_state {
283 enum drm_mode_subconnector subconnector;
291 unsigned int brightness;
292 unsigned int contrast;
293 unsigned int flicker_reduction;
294 unsigned int overscan;
295 unsigned int saturation;
300 * struct drm_connector_state - mutable connector state
301 * @connector: backpointer to the connector
302 * @best_encoder: can be used by helpers and drivers to select the encoder
303 * @state: backpointer to global drm_atomic_state
304 * @tv: TV connector state
306 struct drm_connector_state {
307 struct drm_connector *connector;
310 * @crtc: CRTC to connect connector to, NULL if disabled.
312 * Do not change this directly, use drm_atomic_set_crtc_for_connector()
315 struct drm_crtc *crtc;
317 struct drm_encoder *best_encoder;
320 * @link_status: Connector link_status to keep track of whether link is
321 * GOOD or BAD to notify userspace if retraining is necessary.
323 enum drm_link_status link_status;
325 struct drm_atomic_state *state;
327 struct drm_tv_connector_state tv;
331 * struct drm_connector_funcs - control connectors on a given device
333 * Each CRTC may have one or more connectors attached to it. The functions
334 * below allow the core DRM code to control connectors, enumerate available modes,
337 struct drm_connector_funcs {
341 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
342 * is exposed as a standard property on the connector, but diverted to
343 * this callback in the drm core. Note that atomic drivers don't
344 * implement the 4 level DPMS support on the connector any more, but
345 * instead only have an on/off "ACTIVE" property on the CRTC object.
347 * Drivers implementing atomic modeset should use
348 * drm_atomic_helper_connector_dpms() to implement this hook.
352 * 0 on success or a negative error code on failure.
354 int (*dpms)(struct drm_connector *connector, int mode);
359 * Reset connector hardware and software state to off. This function isn't
360 * called by the core directly, only through drm_mode_config_reset().
361 * It's not a helper hook only for historical reasons.
363 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
364 * atomic state using this hook.
366 void (*reset)(struct drm_connector *connector);
371 * Check to see if anything is attached to the connector. The parameter
372 * force is set to false whilst polling, true when checking the
373 * connector due to a user request. force can be used by the driver to
374 * avoid expensive, destructive operations during automated probing.
376 * This callback is optional, if not implemented the connector will be
377 * considered as always being attached.
381 * Note that this hook is only called by the probe helper. It's not in
382 * the helper library vtable purely for historical reasons. The only DRM
383 * core entry point to probe connector state is @fill_modes.
387 * drm_connector_status indicating the connector's status.
389 enum drm_connector_status (*detect)(struct drm_connector *connector,
395 * This function is called to update internal encoder state when the
396 * connector is forced to a certain state by userspace, either through
397 * the sysfs interfaces or on the kernel cmdline. In that case the
398 * @detect callback isn't called.
402 * Note that this hook is only called by the probe helper. It's not in
403 * the helper library vtable purely for historical reasons. The only DRM
404 * core entry point to probe connector state is @fill_modes.
406 void (*force)(struct drm_connector *connector);
411 * Entry point for output detection and basic mode validation. The
412 * driver should reprobe the output if needed (e.g. when hotplug
413 * handling is unreliable), add all detected modes to &drm_connector.modes
414 * and filter out any the device can't support in any configuration. It
415 * also needs to filter out any modes wider or higher than the
416 * parameters max_width and max_height indicate.
418 * The drivers must also prune any modes no longer valid from
419 * &drm_connector.modes. Furthermore it must update
420 * &drm_connector.status and &drm_connector.edid. If no EDID has been
421 * received for this output connector->edid must be NULL.
423 * Drivers using the probe helpers should use
424 * drm_helper_probe_single_connector_modes() or
425 * drm_helper_probe_single_connector_modes_nomerge() to implement this
430 * The number of modes detected and filled into &drm_connector.modes.
432 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
437 * This is the legacy entry point to update a property attached to the
440 * Drivers implementing atomic modeset should use
441 * drm_atomic_helper_connector_set_property() to implement this hook.
443 * This callback is optional if the driver does not support any legacy
444 * driver-private properties.
448 * 0 on success or a negative error code on failure.
450 int (*set_property)(struct drm_connector *connector, struct drm_property *property,
456 * This optional hook can be used to register additional userspace
457 * interfaces attached to the connector, light backlight control, i2c,
458 * DP aux or similar interfaces. It is called late in the driver load
459 * sequence from drm_connector_register() when registering all the
460 * core drm connector interfaces. Everything added from this callback
461 * should be unregistered in the early_unregister callback.
463 * This is called while holding &drm_connector.mutex.
467 * 0 on success, or a negative error code on failure.
469 int (*late_register)(struct drm_connector *connector);
474 * This optional hook should be used to unregister the additional
475 * userspace interfaces attached to the connector from
476 * late_register(). It is called from drm_connector_unregister(),
477 * early in the driver unload sequence to disable userspace access
478 * before data structures are torndown.
480 * This is called while holding &drm_connector.mutex.
482 void (*early_unregister)(struct drm_connector *connector);
487 * Clean up connector resources. This is called at driver unload time
488 * through drm_mode_config_cleanup(). It can also be called at runtime
489 * when a connector is being hot-unplugged for drivers that support
490 * connector hotplugging (e.g. DisplayPort MST).
492 void (*destroy)(struct drm_connector *connector);
495 * @atomic_duplicate_state:
497 * Duplicate the current atomic state for this connector and return it.
498 * The core and helpers guarantee that any atomic state duplicated with
499 * this hook and still owned by the caller (i.e. not transferred to the
500 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
501 * cleaned up by calling the @atomic_destroy_state hook in this
504 * Atomic drivers which don't subclass &struct drm_connector_state should use
505 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
506 * state structure to extend it with driver-private state should use
507 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
508 * duplicated in a consistent fashion across drivers.
510 * It is an error to call this hook before &drm_connector.state has been
511 * initialized correctly.
515 * If the duplicate state references refcounted resources this hook must
516 * acquire a reference for each of them. The driver must release these
517 * references again in @atomic_destroy_state.
521 * Duplicated atomic state or NULL when the allocation failed.
523 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
526 * @atomic_destroy_state:
528 * Destroy a state duplicated with @atomic_duplicate_state and release
529 * or unreference all resources it references
531 void (*atomic_destroy_state)(struct drm_connector *connector,
532 struct drm_connector_state *state);
535 * @atomic_set_property:
537 * Decode a driver-private property value and store the decoded value
538 * into the passed-in state structure. Since the atomic core decodes all
539 * standardized properties (even for extensions beyond the core set of
540 * properties which might not be implemented by all drivers) this
541 * requires drivers to subclass the state structure.
543 * Such driver-private properties should really only be implemented for
544 * truly hardware/vendor specific state. Instead it is preferred to
545 * standardize atomic extension and decode the properties used to expose
546 * such an extension in the core.
548 * Do not call this function directly, use
549 * drm_atomic_connector_set_property() instead.
551 * This callback is optional if the driver does not support any
552 * driver-private atomic properties.
556 * This function is called in the state assembly phase of atomic
557 * modesets, which can be aborted for any reason (including on
558 * userspace's request to just check whether a configuration would be
559 * possible). Drivers MUST NOT touch any persistent state (hardware or
560 * software) or data structures except the passed in @state parameter.
562 * Also since userspace controls in which order properties are set this
563 * function must not do any input validation (since the state update is
564 * incomplete and hence likely inconsistent). Instead any such input
565 * validation must be done in the various atomic_check callbacks.
569 * 0 if the property has been found, -EINVAL if the property isn't
570 * implemented by the driver (which shouldn't ever happen, the core only
571 * asks for properties attached to this connector). No other validation
572 * is allowed by the driver. The core already checks that the property
573 * value is within the range (integer, valid enum value, ...) the driver
574 * set when registering the property.
576 int (*atomic_set_property)(struct drm_connector *connector,
577 struct drm_connector_state *state,
578 struct drm_property *property,
582 * @atomic_get_property:
584 * Reads out the decoded driver-private property. This is used to
585 * implement the GETCONNECTOR IOCTL.
587 * Do not call this function directly, use
588 * drm_atomic_connector_get_property() instead.
590 * This callback is optional if the driver does not support any
591 * driver-private atomic properties.
595 * 0 on success, -EINVAL if the property isn't implemented by the
596 * driver (which shouldn't ever happen, the core only asks for
597 * properties attached to this connector).
599 int (*atomic_get_property)(struct drm_connector *connector,
600 const struct drm_connector_state *state,
601 struct drm_property *property,
605 * @atomic_print_state:
607 * If driver subclasses &struct drm_connector_state, it should implement
608 * this optional hook for printing additional driver specific state.
610 * Do not call this directly, use drm_atomic_connector_print_state()
613 void (*atomic_print_state)(struct drm_printer *p,
614 const struct drm_connector_state *state);
617 /* mode specified on the command line */
618 struct drm_cmdline_mode {
620 bool refresh_specified;
629 enum drm_connector_force force;
633 * struct drm_connector - central DRM connector control structure
634 * @dev: parent DRM device
635 * @kdev: kernel device for sysfs attributes
636 * @attr: sysfs attributes
637 * @head: list management
638 * @base: base KMS object
639 * @name: human readable name, can be overwritten by the driver
640 * @connector_type: one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
641 * @connector_type_id: index into connector type enum
642 * @interlace_allowed: can this connector handle interlaced modes?
643 * @doublescan_allowed: can this connector handle doublescan?
644 * @stereo_allowed: can this connector handle stereo modes?
645 * @funcs: connector control functions
646 * @edid_blob_ptr: DRM property containing EDID if present
647 * @properties: property tracking for this connector
648 * @dpms: current dpms state
649 * @helper_private: mid-layer private data
650 * @cmdline_mode: mode line parsed from the kernel cmdline for this connector
651 * @force: a DRM_FORCE_<foo> state for forced mode sets
652 * @override_edid: has the EDID been overwritten through debugfs for testing?
653 * @encoder_ids: valid encoders for this connector
654 * @encoder: encoder driving this connector, if any
655 * @eld: EDID-like data, if present
656 * @latency_present: AV delay info from ELD, if found
657 * @video_latency: video latency info from ELD, if found
658 * @audio_latency: audio latency info from ELD, if found
659 * @null_edid_counter: track sinks that give us all zeros for the EDID
660 * @bad_edid_counter: track sinks that give us an EDID with invalid checksum
661 * @edid_corrupt: indicates whether the last read EDID was corrupt
662 * @debugfs_entry: debugfs directory for this connector
663 * @has_tile: is this connector connected to a tiled monitor
664 * @tile_group: tile group for the connected monitor
665 * @tile_is_single_monitor: whether the tile is one monitor housing
666 * @num_h_tile: number of horizontal tiles in the tile group
667 * @num_v_tile: number of vertical tiles in the tile group
668 * @tile_h_loc: horizontal location of this tile
669 * @tile_v_loc: vertical location of this tile
670 * @tile_h_size: horizontal size of this tile.
671 * @tile_v_size: vertical size of this tile.
673 * Each connector may be connected to one or more CRTCs, or may be clonable by
674 * another connector if they can share a CRTC. Each connector also has a specific
675 * position in the broader display (referred to as a 'screen' though it could
676 * span multiple monitors).
678 struct drm_connector {
679 struct drm_device *dev;
681 struct device_attribute *attr;
682 struct list_head head;
684 struct drm_mode_object base;
689 * @mutex: Lock for general connector state, but currently only protects
690 * @registered. Most of the connector state is still protected by
691 * &drm_mode_config.mutex.
696 * @index: Compacted connector index, which matches the position inside
697 * the mode_config.list for drivers not supporting hot-add/removing. Can
698 * be used as an array index. It is invariant over the lifetime of the
704 int connector_type_id;
705 bool interlace_allowed;
706 bool doublescan_allowed;
709 * @registered: Is this connector exposed (registered) with userspace?
710 * Protected by @mutex.
716 * Modes available on this connector (from fill_modes() + user).
717 * Protected by &drm_mode_config.mutex.
719 struct list_head modes;
723 * One of the drm_connector_status enums (connected, not, or unknown).
724 * Protected by &drm_mode_config.mutex.
726 enum drm_connector_status status;
730 * These are modes added by probing with DDC or the BIOS, before
731 * filtering is applied. Used by the probe helpers. Protected by
732 * &drm_mode_config.mutex.
734 struct list_head probed_modes;
737 * @display_info: Display information is filled from EDID information
738 * when a display is detected. For non hot-pluggable displays such as
739 * flat panels in embedded systems, the driver should initialize the
740 * &drm_display_info.width_mm and &drm_display_info.height_mm fields
741 * with the physical size of the display.
743 * Protected by &drm_mode_config.mutex.
745 struct drm_display_info display_info;
746 const struct drm_connector_funcs *funcs;
748 struct drm_property_blob *edid_blob_ptr;
749 struct drm_object_properties properties;
754 * DRM blob property data for the DP MST path property.
756 struct drm_property_blob *path_blob_ptr;
761 * DRM blob property data for the tile property (used mostly by DP MST).
762 * This is meant for screens which are driven through separate display
763 * pipelines represented by &drm_crtc, which might not be running with
764 * genlocked clocks. For tiled panels which are genlocked, like
765 * dual-link LVDS or dual-link DSI, the driver should try to not expose
766 * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
768 struct drm_property_blob *tile_blob_ptr;
770 /* should we poll this connector for connects and disconnects */
771 /* hot plug detectable */
772 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
773 /* poll for connections */
774 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
775 /* can cleanly poll for disconnections without flickering the screen */
776 /* DACs should rarely do this without a lot of testing */
777 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
782 * Connector polling mode, a combination of
784 * DRM_CONNECTOR_POLL_HPD
785 * The connector generates hotplug events and doesn't need to be
786 * periodically polled. The CONNECT and DISCONNECT flags must not
787 * be set together with the HPD flag.
789 * DRM_CONNECTOR_POLL_CONNECT
790 * Periodically poll the connector for connection.
792 * DRM_CONNECTOR_POLL_DISCONNECT
793 * Periodically poll the connector for disconnection.
795 * Set to 0 for connectors that don't support connection status
800 /* requested DPMS state */
803 const struct drm_connector_helper_funcs *helper_private;
805 /* forced on connector */
806 struct drm_cmdline_mode cmdline_mode;
807 enum drm_connector_force force;
810 #define DRM_CONNECTOR_MAX_ENCODER 3
811 uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
812 struct drm_encoder *encoder; /* currently active encoder */
814 #define MAX_ELD_BYTES 128
816 uint8_t eld[MAX_ELD_BYTES];
817 bool latency_present[2];
818 int video_latency[2]; /* [0]: progressive, [1]: interlaced */
819 int audio_latency[2];
820 int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
821 unsigned bad_edid_counter;
823 /* Flag for raw EDID header corruption - used in Displayport
824 * compliance testing - * Displayport Link CTS Core 1.2 rev1.1 4.2.2.6
828 struct dentry *debugfs_entry;
833 * Current atomic state for this connector.
835 * This is protected by @drm_mode_config.connection_mutex. Note that
836 * nonblocking atomic commits access the current connector state without
837 * taking locks. Either by going through the &struct drm_atomic_state
838 * pointers, see for_each_connector_in_state(),
839 * for_each_oldnew_connector_in_state(),
840 * for_each_old_connector_in_state() and
841 * for_each_new_connector_in_state(). Or through careful ordering of
842 * atomic commit operations as implemented in the atomic helpers, see
843 * &struct drm_crtc_commit.
845 struct drm_connector_state *state;
849 struct drm_tile_group *tile_group;
850 bool tile_is_single_monitor;
852 uint8_t num_h_tile, num_v_tile;
853 uint8_t tile_h_loc, tile_v_loc;
854 uint16_t tile_h_size, tile_v_size;
857 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
859 int drm_connector_init(struct drm_device *dev,
860 struct drm_connector *connector,
861 const struct drm_connector_funcs *funcs,
863 int drm_connector_register(struct drm_connector *connector);
864 void drm_connector_unregister(struct drm_connector *connector);
865 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
866 struct drm_encoder *encoder);
868 void drm_connector_cleanup(struct drm_connector *connector);
869 static inline unsigned drm_connector_index(struct drm_connector *connector)
871 return connector->index;
875 * drm_connector_lookup - lookup connector object
877 * @id: connector object id
879 * This function looks up the connector object specified by id
880 * add takes a reference to it.
882 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
885 struct drm_mode_object *mo;
886 mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CONNECTOR);
887 return mo ? obj_to_connector(mo) : NULL;
891 * drm_connector_get - acquire a connector reference
892 * @connector: DRM connector
894 * This function increments the connector's refcount.
896 static inline void drm_connector_get(struct drm_connector *connector)
898 drm_mode_object_get(&connector->base);
902 * drm_connector_put - release a connector reference
903 * @connector: DRM connector
905 * This function decrements the connector's reference count and frees the
906 * object if the reference count drops to zero.
908 static inline void drm_connector_put(struct drm_connector *connector)
910 drm_mode_object_put(&connector->base);
914 * drm_connector_reference - acquire a connector reference
915 * @connector: DRM connector
917 * This is a compatibility alias for drm_connector_get() and should not be
920 static inline void drm_connector_reference(struct drm_connector *connector)
922 drm_connector_get(connector);
926 * drm_connector_unreference - release a connector reference
927 * @connector: DRM connector
929 * This is a compatibility alias for drm_connector_put() and should not be
932 static inline void drm_connector_unreference(struct drm_connector *connector)
934 drm_connector_put(connector);
937 const char *drm_get_connector_status_name(enum drm_connector_status status);
938 const char *drm_get_subpixel_order_name(enum subpixel_order order);
939 const char *drm_get_dpms_name(int val);
940 const char *drm_get_dvi_i_subconnector_name(int val);
941 const char *drm_get_dvi_i_select_name(int val);
942 const char *drm_get_tv_subconnector_name(int val);
943 const char *drm_get_tv_select_name(int val);
945 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
946 int drm_mode_create_tv_properties(struct drm_device *dev,
947 unsigned int num_modes,
948 const char * const modes[]);
949 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
950 int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
951 int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
953 int drm_mode_connector_set_path_property(struct drm_connector *connector,
955 int drm_mode_connector_set_tile_property(struct drm_connector *connector);
956 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
957 const struct edid *edid);
958 void drm_mode_connector_set_link_status_property(struct drm_connector *connector,
959 uint64_t link_status);
962 * struct drm_tile_group - Tile group metadata
963 * @refcount: reference count
965 * @id: tile group id exposed to userspace
966 * @group_data: Sink-private data identifying this group
968 * @group_data corresponds to displayid vend/prod/serial for external screens
971 struct drm_tile_group {
972 struct kref refcount;
973 struct drm_device *dev;
978 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
980 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
982 void drm_mode_put_tile_group(struct drm_device *dev,
983 struct drm_tile_group *tg);
986 * drm_for_each_connector - iterate over all connectors
987 * @connector: the loop cursor
988 * @dev: the DRM device
990 * Iterate over all connectors of @dev.
994 * This iterator is not safe against hotadd/removal of connectors and is
995 * deprecated. Use drm_for_each_connector_iter() instead.
997 #define drm_for_each_connector(connector, dev) \
998 list_for_each_entry(connector, &(dev)->mode_config.connector_list, head)
1001 * struct drm_connector_list_iter - connector_list iterator
1003 * This iterator tracks state needed to be able to walk the connector_list
1004 * within struct drm_mode_config. Only use together with
1005 * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and
1006 * drm_connector_list_iter_next() respectively the convenience macro
1007 * drm_for_each_connector_iter().
1009 struct drm_connector_list_iter {
1011 struct drm_device *dev;
1012 struct drm_connector *conn;
1015 void drm_connector_list_iter_begin(struct drm_device *dev,
1016 struct drm_connector_list_iter *iter);
1017 struct drm_connector *
1018 drm_connector_list_iter_next(struct drm_connector_list_iter *iter);
1019 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
1022 * drm_for_each_connector_iter - connector_list iterator macro
1023 * @connector: &struct drm_connector pointer used as cursor
1024 * @iter: &struct drm_connector_list_iter
1026 * Note that @connector is only valid within the list body, if you want to use
1027 * @connector after calling drm_connector_list_iter_end() then you need to grab
1028 * your own reference first using drm_connector_begin().
1030 #define drm_for_each_connector_iter(connector, iter) \
1031 while ((connector = drm_connector_list_iter_next(iter)))