2 * Copyright (c) 2016 Intel Corporation
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5 * documentation for any purpose is hereby granted without fee, provided that
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23 #ifndef __DRM_CONNECTOR_H__
24 #define __DRM_CONNECTOR_H__
26 #include <linux/list.h>
27 #include <linux/llist.h>
28 #include <linux/ctype.h>
29 #include <linux/hdmi.h>
30 #include <drm/drm_mode_object.h>
31 #include <drm/drm_util.h>
33 #include <uapi/drm/drm_mode.h>
35 struct drm_connector_helper_funcs;
36 struct drm_modeset_acquire_ctx;
41 struct drm_property_blob;
45 enum drm_connector_force {
46 DRM_FORCE_UNSPECIFIED,
48 DRM_FORCE_ON, /* force on analog part normally */
49 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
53 * enum drm_connector_status - status for a &drm_connector
55 * This enum is used to track the connector status. There are no separate
56 * #defines for the uapi!
58 enum drm_connector_status {
60 * @connector_status_connected: The connector is definitely connected to
61 * a sink device, and can be enabled.
63 connector_status_connected = 1,
65 * @connector_status_disconnected: The connector isn't connected to a
66 * sink device which can be autodetect. For digital outputs like DP or
67 * HDMI (which can be realiable probed) this means there's really
68 * nothing there. It is driver-dependent whether a connector with this
69 * status can be lit up or not.
71 connector_status_disconnected = 2,
73 * @connector_status_unknown: The connector's status could not be
74 * reliably detected. This happens when probing would either cause
75 * flicker (like load-detection when the connector is in use), or when a
76 * hardware resource isn't available (like when load-detection needs a
77 * free CRTC). It should be possible to light up the connector with one
78 * of the listed fallback modes. For default configuration userspace
79 * should only try to light up connectors with unknown status when
80 * there's not connector with @connector_status_connected.
82 connector_status_unknown = 3,
86 * enum drm_connector_registration_status - userspace registration status for
89 * This enum is used to track the status of initializing a connector and
90 * registering it with userspace, so that DRM can prevent bogus modesets on
91 * connectors that no longer exist.
93 enum drm_connector_registration_state {
95 * @DRM_CONNECTOR_INITIALIZING: The connector has just been created,
96 * but has yet to be exposed to userspace. There should be no
97 * additional restrictions to how the state of this connector may be
100 DRM_CONNECTOR_INITIALIZING = 0,
103 * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized
104 * and registered with sysfs, as such it has been exposed to
105 * userspace. There should be no additional restrictions to how the
106 * state of this connector may be modified.
108 DRM_CONNECTOR_REGISTERED = 1,
111 * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed
112 * to userspace and has since been unregistered and removed from
113 * userspace, or the connector was unregistered before it had a chance
114 * to be exposed to userspace (e.g. still in the
115 * @DRM_CONNECTOR_INITIALIZING state). When a connector is
116 * unregistered, there are additional restrictions to how its state
119 * - An unregistered connector may only have its DPMS changed from
120 * On->Off. Once DPMS is changed to Off, it may not be switched back
122 * - Modesets are not allowed on unregistered connectors, unless they
123 * would result in disabling its assigned CRTCs. This means
124 * disabling a CRTC on an unregistered connector is OK, but enabling
126 * - Removing a CRTC from an unregistered connector is OK, but new
127 * CRTCs may never be assigned to an unregistered connector.
129 DRM_CONNECTOR_UNREGISTERED = 2,
132 enum subpixel_order {
134 SubPixelHorizontalRGB,
135 SubPixelHorizontalBGR,
143 * struct drm_scrambling: sink's scrambling support.
145 struct drm_scrambling {
147 * @supported: scrambling supported for rates > 340 Mhz.
151 * @low_rates: scrambling supported for rates <= 340 Mhz.
157 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink
159 * Provides SCDC register support and capabilities related information on a
160 * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0.
164 * @supported: status control & data channel present.
168 * @read_request: sink is capable of generating scdc read request.
172 * @scrambling: sink's scrambling capabilities
174 struct drm_scrambling scrambling;
179 * struct drm_hdmi_info - runtime information about the connected HDMI sink
181 * Describes if a given display supports advanced HDMI 2.0 features.
182 * This information is available in CEA-861-F extension blocks (like HF-VSDB).
184 struct drm_hdmi_info {
185 /** @scdc: sink's scdc support and capabilities */
186 struct drm_scdc scdc;
189 * @y420_vdb_modes: bitmap of modes which can support ycbcr420
190 * output only (not normal RGB/YCBCR444/422 outputs). There are total
191 * 107 VICs defined by CEA-861-F spec, so the size is 128 bits to map
194 unsigned long y420_vdb_modes[BITS_TO_LONGS(128)];
197 * @y420_cmdb_modes: bitmap of modes which can support ycbcr420
198 * output also, along with normal HDMI outputs. There are total 107
199 * VICs defined by CEA-861-F spec, so the size is 128 bits to map upto
202 unsigned long y420_cmdb_modes[BITS_TO_LONGS(128)];
204 /** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
207 /** @y420_dc_modes: bitmap of deep color support index */
212 * enum drm_link_status - connector's link_status property value
214 * This enum is used as the connector's link status property value.
215 * It is set to the values defined in uapi.
217 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful
219 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training
222 enum drm_link_status {
223 DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD,
224 DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD,
228 * enum drm_panel_orientation - panel_orientation info for &drm_display_info
230 * This enum is used to track the (LCD) panel orientation. There are no
231 * separate #defines for the uapi!
233 * @DRM_MODE_PANEL_ORIENTATION_UNKNOWN: The drm driver has not provided any
234 * panel orientation information (normal
235 * for non panels) in this case the "panel
236 * orientation" connector prop will not be
238 * @DRM_MODE_PANEL_ORIENTATION_NORMAL: The top side of the panel matches the
239 * top side of the device's casing.
240 * @DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: The top side of the panel matches the
241 * bottom side of the device's casing, iow
242 * the panel is mounted upside-down.
243 * @DRM_MODE_PANEL_ORIENTATION_LEFT_UP: The left side of the panel matches the
244 * top side of the device's casing.
245 * @DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: The right side of the panel matches the
246 * top side of the device's casing.
248 enum drm_panel_orientation {
249 DRM_MODE_PANEL_ORIENTATION_UNKNOWN = -1,
250 DRM_MODE_PANEL_ORIENTATION_NORMAL = 0,
251 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP,
252 DRM_MODE_PANEL_ORIENTATION_LEFT_UP,
253 DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
257 * This is a consolidated colorimetry list supported by HDMI and
258 * DP protocol standard. The respective connectors will register
259 * a property with the subset of this list (supported by that
260 * respective protocol). Userspace will set the colorspace through
261 * a colorspace property which will be created and exposed to
265 /* For Default case, driver will set the colorspace */
266 #define DRM_MODE_COLORIMETRY_DEFAULT 0
267 /* CEA 861 Normal Colorimetry options */
268 #define DRM_MODE_COLORIMETRY_NO_DATA 0
269 #define DRM_MODE_COLORIMETRY_SMPTE_170M_YCC 1
270 #define DRM_MODE_COLORIMETRY_BT709_YCC 2
271 /* CEA 861 Extended Colorimetry Options */
272 #define DRM_MODE_COLORIMETRY_XVYCC_601 3
273 #define DRM_MODE_COLORIMETRY_XVYCC_709 4
274 #define DRM_MODE_COLORIMETRY_SYCC_601 5
275 #define DRM_MODE_COLORIMETRY_OPYCC_601 6
276 #define DRM_MODE_COLORIMETRY_OPRGB 7
277 #define DRM_MODE_COLORIMETRY_BT2020_CYCC 8
278 #define DRM_MODE_COLORIMETRY_BT2020_RGB 9
279 #define DRM_MODE_COLORIMETRY_BT2020_YCC 10
280 /* Additional Colorimetry extension added as part of CTA 861.G */
281 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65 11
282 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER 12
285 * enum drm_bus_flags - bus_flags info for &drm_display_info
287 * This enum defines signal polarities and clock edge information for signals on
288 * a bus as bitmask flags.
290 * The clock edge information is conveyed by two sets of symbols,
291 * DRM_BUS_FLAGS_*_DRIVE_\* and DRM_BUS_FLAGS_*_SAMPLE_\*. When this enum is
292 * used to describe a bus from the point of view of the transmitter, the
293 * \*_DRIVE_\* flags should be used. When used from the point of view of the
294 * receiver, the \*_SAMPLE_\* flags should be used. The \*_DRIVE_\* and
295 * \*_SAMPLE_\* flags alias each other, with the \*_SAMPLE_POSEDGE and
296 * \*_SAMPLE_NEGEDGE flags being equal to \*_DRIVE_NEGEDGE and \*_DRIVE_POSEDGE
297 * respectively. This simplifies code as signals are usually sampled on the
298 * opposite edge of the driving edge. Transmitters and receivers may however
299 * need to take other signal timings into account to convert between driving
302 * @DRM_BUS_FLAG_DE_LOW: The Data Enable signal is active low
303 * @DRM_BUS_FLAG_DE_HIGH: The Data Enable signal is active high
304 * @DRM_BUS_FLAG_PIXDATA_POSEDGE: Legacy value, do not use
305 * @DRM_BUS_FLAG_PIXDATA_NEGEDGE: Legacy value, do not use
306 * @DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE: Data is driven on the rising edge of
308 * @DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE: Data is driven on the falling edge of
310 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE: Data is sampled on the rising edge of
312 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE: Data is sampled on the falling edge of
314 * @DRM_BUS_FLAG_DATA_MSB_TO_LSB: Data is transmitted MSB to LSB on the bus
315 * @DRM_BUS_FLAG_DATA_LSB_TO_MSB: Data is transmitted LSB to MSB on the bus
316 * @DRM_BUS_FLAG_SYNC_POSEDGE: Legacy value, do not use
317 * @DRM_BUS_FLAG_SYNC_NEGEDGE: Legacy value, do not use
318 * @DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE: Sync signals are driven on the rising
319 * edge of the pixel clock
320 * @DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE: Sync signals are driven on the falling
321 * edge of the pixel clock
322 * @DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE: Sync signals are sampled on the rising
323 * edge of the pixel clock
324 * @DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE: Sync signals are sampled on the falling
325 * edge of the pixel clock
328 DRM_BUS_FLAG_DE_LOW = BIT(0),
329 DRM_BUS_FLAG_DE_HIGH = BIT(1),
330 DRM_BUS_FLAG_PIXDATA_POSEDGE = BIT(2),
331 DRM_BUS_FLAG_PIXDATA_NEGEDGE = BIT(3),
332 DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE,
333 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
334 DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
335 DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE,
336 DRM_BUS_FLAG_DATA_MSB_TO_LSB = BIT(4),
337 DRM_BUS_FLAG_DATA_LSB_TO_MSB = BIT(5),
338 DRM_BUS_FLAG_SYNC_POSEDGE = BIT(6),
339 DRM_BUS_FLAG_SYNC_NEGEDGE = BIT(7),
340 DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE = DRM_BUS_FLAG_SYNC_POSEDGE,
341 DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE,
342 DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE,
343 DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE = DRM_BUS_FLAG_SYNC_POSEDGE,
347 * struct drm_display_info - runtime data about the connected sink
349 * Describes a given display (e.g. CRT or flat panel) and its limitations. For
350 * fixed display sinks like built-in panels there's not much difference between
351 * this and &struct drm_connector. But for sinks with a real cable this
352 * structure is meant to describe all the things at the other end of the cable.
354 * For sinks which provide an EDID this can be filled out by calling
355 * drm_add_edid_modes().
357 struct drm_display_info {
359 * @width_mm: Physical width in mm.
361 unsigned int width_mm;
364 * @height_mm: Physical height in mm.
366 unsigned int height_mm;
369 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
374 * @subpixel_order: Subpixel order of LCD panels.
376 enum subpixel_order subpixel_order;
378 #define DRM_COLOR_FORMAT_RGB444 (1<<0)
379 #define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
380 #define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
381 #define DRM_COLOR_FORMAT_YCRCB420 (1<<3)
384 * @panel_orientation: Read only connector property for built-in panels,
385 * indicating the orientation of the panel vs the device's casing.
386 * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN.
387 * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the
388 * fb to compensate and gets exported as prop to userspace.
390 int panel_orientation;
393 * @color_formats: HDMI Color formats, selects between RGB and YCrCb
394 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
395 * as used to describe the pixel format in framebuffers, and also don't
396 * match the formats in @bus_formats which are shared with v4l.
401 * @bus_formats: Pixel data format on the wire, somewhat redundant with
402 * @color_formats. Array of size @num_bus_formats encoded using
403 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
405 const u32 *bus_formats;
407 * @num_bus_formats: Size of @bus_formats array.
409 unsigned int num_bus_formats;
412 * @bus_flags: Additional information (like pixel signal polarity) for
413 * the pixel data on the bus, using &enum drm_bus_flags values
419 * @max_tmds_clock: Maximum TMDS clock rate supported by the
420 * sink in kHz. 0 means undefined.
425 * @dvi_dual: Dual-link DVI sink?
430 * @has_hdmi_infoframe: Does the sink support the HDMI infoframe?
432 bool has_hdmi_infoframe;
435 * @rgb_quant_range_selectable: Does the sink support selecting
436 * the RGB quantization range?
438 bool rgb_quant_range_selectable;
441 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
442 * more stuff redundant with @bus_formats.
444 u8 edid_hdmi_dc_modes;
447 * @cea_rev: CEA revision of the HDMI sink.
452 * @hdmi: advance features of a HDMI sink.
454 struct drm_hdmi_info hdmi;
457 * @non_desktop: Non desktop display (HMD).
462 int drm_display_info_set_bus_formats(struct drm_display_info *info,
464 unsigned int num_formats);
467 * struct drm_tv_connector_state - TV connector related states
468 * @subconnector: selected subconnector
469 * @margins: margins (all margins are expressed in pixels)
470 * @margins.left: left margin
471 * @margins.right: right margin
472 * @margins.top: top margin
473 * @margins.bottom: bottom margin
475 * @brightness: brightness in percent
476 * @contrast: contrast in percent
477 * @flicker_reduction: flicker reduction in percent
478 * @overscan: overscan in percent
479 * @saturation: saturation in percent
480 * @hue: hue in percent
482 struct drm_tv_connector_state {
483 enum drm_mode_subconnector subconnector;
491 unsigned int brightness;
492 unsigned int contrast;
493 unsigned int flicker_reduction;
494 unsigned int overscan;
495 unsigned int saturation;
500 * struct drm_connector_state - mutable connector state
502 struct drm_connector_state {
503 /** @connector: backpointer to the connector */
504 struct drm_connector *connector;
507 * @crtc: CRTC to connect connector to, NULL if disabled.
509 * Do not change this directly, use drm_atomic_set_crtc_for_connector()
512 struct drm_crtc *crtc;
517 * Used by the atomic helpers to select the encoder, through the
518 * &drm_connector_helper_funcs.atomic_best_encoder or
519 * &drm_connector_helper_funcs.best_encoder callbacks.
521 struct drm_encoder *best_encoder;
524 * @link_status: Connector link_status to keep track of whether link is
525 * GOOD or BAD to notify userspace if retraining is necessary.
527 enum drm_link_status link_status;
529 /** @state: backpointer to global drm_atomic_state */
530 struct drm_atomic_state *state;
533 * @commit: Tracks the pending commit to prevent use-after-free conditions.
535 * Is only set when @crtc is NULL.
537 struct drm_crtc_commit *commit;
539 /** @tv: TV connector state */
540 struct drm_tv_connector_state tv;
543 * @picture_aspect_ratio: Connector property to control the
544 * HDMI infoframe aspect ratio setting.
546 * The %DRM_MODE_PICTURE_ASPECT_\* values much match the
547 * values for &enum hdmi_picture_aspect
549 enum hdmi_picture_aspect picture_aspect_ratio;
552 * @content_type: Connector property to control the
553 * HDMI infoframe content type setting.
554 * The %DRM_MODE_CONTENT_TYPE_\* values much
557 unsigned int content_type;
560 * @scaling_mode: Connector property to control the
561 * upscaling, mostly used for built-in panels.
563 unsigned int scaling_mode;
566 * @content_protection: Connector property to request content
567 * protection. This is most commonly used for HDCP.
569 unsigned int content_protection;
572 * @colorspace: State variable for Connector property to request
573 * colorspace change on Sink. This is most commonly used to switch
574 * to wider color gamuts like BT2020.
579 * @writeback_job: Writeback job for writeback connectors
581 * Holds the framebuffer and out-fence for a writeback connector. As
582 * the writeback completion may be asynchronous to the normal commit
583 * cycle, the writeback job lifetime is managed separately from the
584 * normal atomic state by this object.
586 * See also: drm_writeback_queue_job() and
587 * drm_writeback_signal_completion()
589 struct drm_writeback_job *writeback_job;
592 * @max_requested_bpc: Connector property to limit the maximum bit
593 * depth of the pixels.
595 u8 max_requested_bpc;
598 * @max_bpc: Connector max_bpc based on the requested max_bpc property
599 * and the connector bpc limitations obtained from edid.
605 * struct drm_connector_funcs - control connectors on a given device
607 * Each CRTC may have one or more connectors attached to it. The functions
608 * below allow the core DRM code to control connectors, enumerate available modes,
611 struct drm_connector_funcs {
615 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
616 * is exposed as a standard property on the connector, but diverted to
617 * this callback in the drm core. Note that atomic drivers don't
618 * implement the 4 level DPMS support on the connector any more, but
619 * instead only have an on/off "ACTIVE" property on the CRTC object.
621 * This hook is not used by atomic drivers, remapping of the legacy DPMS
622 * property is entirely handled in the DRM core.
626 * 0 on success or a negative error code on failure.
628 int (*dpms)(struct drm_connector *connector, int mode);
633 * Reset connector hardware and software state to off. This function isn't
634 * called by the core directly, only through drm_mode_config_reset().
635 * It's not a helper hook only for historical reasons.
637 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
638 * atomic state using this hook.
640 void (*reset)(struct drm_connector *connector);
645 * Check to see if anything is attached to the connector. The parameter
646 * force is set to false whilst polling, true when checking the
647 * connector due to a user request. force can be used by the driver to
648 * avoid expensive, destructive operations during automated probing.
650 * This callback is optional, if not implemented the connector will be
651 * considered as always being attached.
655 * Note that this hook is only called by the probe helper. It's not in
656 * the helper library vtable purely for historical reasons. The only DRM
657 * core entry point to probe connector state is @fill_modes.
659 * Note that the helper library will already hold
660 * &drm_mode_config.connection_mutex. Drivers which need to grab additional
661 * locks to avoid races with concurrent modeset changes need to use
662 * &drm_connector_helper_funcs.detect_ctx instead.
666 * drm_connector_status indicating the connector's status.
668 enum drm_connector_status (*detect)(struct drm_connector *connector,
674 * This function is called to update internal encoder state when the
675 * connector is forced to a certain state by userspace, either through
676 * the sysfs interfaces or on the kernel cmdline. In that case the
677 * @detect callback isn't called.
681 * Note that this hook is only called by the probe helper. It's not in
682 * the helper library vtable purely for historical reasons. The only DRM
683 * core entry point to probe connector state is @fill_modes.
685 void (*force)(struct drm_connector *connector);
690 * Entry point for output detection and basic mode validation. The
691 * driver should reprobe the output if needed (e.g. when hotplug
692 * handling is unreliable), add all detected modes to &drm_connector.modes
693 * and filter out any the device can't support in any configuration. It
694 * also needs to filter out any modes wider or higher than the
695 * parameters max_width and max_height indicate.
697 * The drivers must also prune any modes no longer valid from
698 * &drm_connector.modes. Furthermore it must update
699 * &drm_connector.status and &drm_connector.edid. If no EDID has been
700 * received for this output connector->edid must be NULL.
702 * Drivers using the probe helpers should use
703 * drm_helper_probe_single_connector_modes() to implement this
708 * The number of modes detected and filled into &drm_connector.modes.
710 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
715 * This is the legacy entry point to update a property attached to the
718 * This callback is optional if the driver does not support any legacy
719 * driver-private properties. For atomic drivers it is not used because
720 * property handling is done entirely in the DRM core.
724 * 0 on success or a negative error code on failure.
726 int (*set_property)(struct drm_connector *connector, struct drm_property *property,
732 * This optional hook can be used to register additional userspace
733 * interfaces attached to the connector, light backlight control, i2c,
734 * DP aux or similar interfaces. It is called late in the driver load
735 * sequence from drm_connector_register() when registering all the
736 * core drm connector interfaces. Everything added from this callback
737 * should be unregistered in the early_unregister callback.
739 * This is called while holding &drm_connector.mutex.
743 * 0 on success, or a negative error code on failure.
745 int (*late_register)(struct drm_connector *connector);
750 * This optional hook should be used to unregister the additional
751 * userspace interfaces attached to the connector from
752 * late_register(). It is called from drm_connector_unregister(),
753 * early in the driver unload sequence to disable userspace access
754 * before data structures are torndown.
756 * This is called while holding &drm_connector.mutex.
758 void (*early_unregister)(struct drm_connector *connector);
763 * Clean up connector resources. This is called at driver unload time
764 * through drm_mode_config_cleanup(). It can also be called at runtime
765 * when a connector is being hot-unplugged for drivers that support
766 * connector hotplugging (e.g. DisplayPort MST).
768 void (*destroy)(struct drm_connector *connector);
771 * @atomic_duplicate_state:
773 * Duplicate the current atomic state for this connector and return it.
774 * The core and helpers guarantee that any atomic state duplicated with
775 * this hook and still owned by the caller (i.e. not transferred to the
776 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
777 * cleaned up by calling the @atomic_destroy_state hook in this
780 * This callback is mandatory for atomic drivers.
782 * Atomic drivers which don't subclass &struct drm_connector_state should use
783 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
784 * state structure to extend it with driver-private state should use
785 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
786 * duplicated in a consistent fashion across drivers.
788 * It is an error to call this hook before &drm_connector.state has been
789 * initialized correctly.
793 * If the duplicate state references refcounted resources this hook must
794 * acquire a reference for each of them. The driver must release these
795 * references again in @atomic_destroy_state.
799 * Duplicated atomic state or NULL when the allocation failed.
801 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
804 * @atomic_destroy_state:
806 * Destroy a state duplicated with @atomic_duplicate_state and release
807 * or unreference all resources it references
809 * This callback is mandatory for atomic drivers.
811 void (*atomic_destroy_state)(struct drm_connector *connector,
812 struct drm_connector_state *state);
815 * @atomic_set_property:
817 * Decode a driver-private property value and store the decoded value
818 * into the passed-in state structure. Since the atomic core decodes all
819 * standardized properties (even for extensions beyond the core set of
820 * properties which might not be implemented by all drivers) this
821 * requires drivers to subclass the state structure.
823 * Such driver-private properties should really only be implemented for
824 * truly hardware/vendor specific state. Instead it is preferred to
825 * standardize atomic extension and decode the properties used to expose
826 * such an extension in the core.
828 * Do not call this function directly, use
829 * drm_atomic_connector_set_property() instead.
831 * This callback is optional if the driver does not support any
832 * driver-private atomic properties.
836 * This function is called in the state assembly phase of atomic
837 * modesets, which can be aborted for any reason (including on
838 * userspace's request to just check whether a configuration would be
839 * possible). Drivers MUST NOT touch any persistent state (hardware or
840 * software) or data structures except the passed in @state parameter.
842 * Also since userspace controls in which order properties are set this
843 * function must not do any input validation (since the state update is
844 * incomplete and hence likely inconsistent). Instead any such input
845 * validation must be done in the various atomic_check callbacks.
849 * 0 if the property has been found, -EINVAL if the property isn't
850 * implemented by the driver (which shouldn't ever happen, the core only
851 * asks for properties attached to this connector). No other validation
852 * is allowed by the driver. The core already checks that the property
853 * value is within the range (integer, valid enum value, ...) the driver
854 * set when registering the property.
856 int (*atomic_set_property)(struct drm_connector *connector,
857 struct drm_connector_state *state,
858 struct drm_property *property,
862 * @atomic_get_property:
864 * Reads out the decoded driver-private property. This is used to
865 * implement the GETCONNECTOR IOCTL.
867 * Do not call this function directly, use
868 * drm_atomic_connector_get_property() instead.
870 * This callback is optional if the driver does not support any
871 * driver-private atomic properties.
875 * 0 on success, -EINVAL if the property isn't implemented by the
876 * driver (which shouldn't ever happen, the core only asks for
877 * properties attached to this connector).
879 int (*atomic_get_property)(struct drm_connector *connector,
880 const struct drm_connector_state *state,
881 struct drm_property *property,
885 * @atomic_print_state:
887 * If driver subclasses &struct drm_connector_state, it should implement
888 * this optional hook for printing additional driver specific state.
890 * Do not call this directly, use drm_atomic_connector_print_state()
893 void (*atomic_print_state)(struct drm_printer *p,
894 const struct drm_connector_state *state);
897 /* mode specified on the command line */
898 struct drm_cmdline_mode {
900 bool refresh_specified;
909 enum drm_connector_force force;
913 * struct drm_connector - central DRM connector control structure
915 * Each connector may be connected to one or more CRTCs, or may be clonable by
916 * another connector if they can share a CRTC. Each connector also has a specific
917 * position in the broader display (referred to as a 'screen' though it could
918 * span multiple monitors).
920 struct drm_connector {
921 /** @dev: parent DRM device */
922 struct drm_device *dev;
923 /** @kdev: kernel device for sysfs attributes */
925 /** @attr: sysfs attributes */
926 struct device_attribute *attr;
931 * List of all connectors on a @dev, linked from
932 * &drm_mode_config.connector_list. Protected by
933 * &drm_mode_config.connector_list_lock, but please only use
934 * &drm_connector_list_iter to walk this list.
936 struct list_head head;
938 /** @base: base KMS object */
939 struct drm_mode_object base;
941 /** @name: human readable name, can be overwritten by the driver */
945 * @mutex: Lock for general connector state, but currently only protects
946 * @registered. Most of the connector state is still protected by
947 * &drm_mode_config.mutex.
952 * @index: Compacted connector index, which matches the position inside
953 * the mode_config.list for drivers not supporting hot-add/removing. Can
954 * be used as an array index. It is invariant over the lifetime of the
961 * one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
964 /** @connector_type_id: index into connector type enum */
965 int connector_type_id;
967 * @interlace_allowed:
968 * Can this connector handle interlaced modes? Only used by
969 * drm_helper_probe_single_connector_modes() for mode filtering.
971 bool interlace_allowed;
973 * @doublescan_allowed:
974 * Can this connector handle doublescan? Only used by
975 * drm_helper_probe_single_connector_modes() for mode filtering.
977 bool doublescan_allowed;
980 * Can this connector handle stereo modes? Only used by
981 * drm_helper_probe_single_connector_modes() for mode filtering.
986 * @ycbcr_420_allowed : This bool indicates if this connector is
987 * capable of handling YCBCR 420 output. While parsing the EDID
988 * blocks it's very helpful to know if the source is capable of
989 * handling YCBCR 420 outputs.
991 bool ycbcr_420_allowed;
994 * @registration_state: Is this connector initializing, exposed
995 * (registered) with userspace, or unregistered?
997 * Protected by @mutex.
999 enum drm_connector_registration_state registration_state;
1003 * Modes available on this connector (from fill_modes() + user).
1004 * Protected by &drm_mode_config.mutex.
1006 struct list_head modes;
1010 * One of the drm_connector_status enums (connected, not, or unknown).
1011 * Protected by &drm_mode_config.mutex.
1013 enum drm_connector_status status;
1017 * These are modes added by probing with DDC or the BIOS, before
1018 * filtering is applied. Used by the probe helpers. Protected by
1019 * &drm_mode_config.mutex.
1021 struct list_head probed_modes;
1024 * @display_info: Display information is filled from EDID information
1025 * when a display is detected. For non hot-pluggable displays such as
1026 * flat panels in embedded systems, the driver should initialize the
1027 * &drm_display_info.width_mm and &drm_display_info.height_mm fields
1028 * with the physical size of the display.
1030 * Protected by &drm_mode_config.mutex.
1032 struct drm_display_info display_info;
1034 /** @funcs: connector control functions */
1035 const struct drm_connector_funcs *funcs;
1038 * @edid_blob_ptr: DRM property containing EDID if present. Protected by
1039 * &drm_mode_config.mutex. This should be updated only by calling
1040 * drm_connector_update_edid_property().
1042 struct drm_property_blob *edid_blob_ptr;
1044 /** @properties: property tracking for this connector */
1045 struct drm_object_properties properties;
1048 * @scaling_mode_property: Optional atomic property to control the
1049 * upscaling. See drm_connector_attach_content_protection_property().
1051 struct drm_property *scaling_mode_property;
1054 * @vrr_capable_property: Optional property to help userspace
1055 * query hardware support for variable refresh rate on a connector.
1056 * connector. Drivers can add the property to a connector by
1057 * calling drm_connector_attach_vrr_capable_property().
1059 * This should be updated only by calling
1060 * drm_connector_set_vrr_capable_property().
1062 struct drm_property *vrr_capable_property;
1065 * @content_protection_property: DRM ENUM property for content
1066 * protection. See drm_connector_attach_content_protection_property().
1068 struct drm_property *content_protection_property;
1071 * @colorspace_property: Connector property to set the suitable
1072 * colorspace supported by the sink.
1074 struct drm_property *colorspace_property;
1079 * DRM blob property data for the DP MST path property. This should only
1080 * be updated by calling drm_connector_set_path_property().
1082 struct drm_property_blob *path_blob_ptr;
1085 * @max_bpc_property: Default connector property for the max bpc to be
1086 * driven out of the connector.
1088 struct drm_property *max_bpc_property;
1090 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
1091 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
1092 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
1097 * Connector polling mode, a combination of
1099 * DRM_CONNECTOR_POLL_HPD
1100 * The connector generates hotplug events and doesn't need to be
1101 * periodically polled. The CONNECT and DISCONNECT flags must not
1102 * be set together with the HPD flag.
1104 * DRM_CONNECTOR_POLL_CONNECT
1105 * Periodically poll the connector for connection.
1107 * DRM_CONNECTOR_POLL_DISCONNECT
1108 * Periodically poll the connector for disconnection, without
1109 * causing flickering even when the connector is in use. DACs should
1110 * rarely do this without a lot of testing.
1112 * Set to 0 for connectors that don't support connection status
1118 * @dpms: Current dpms state. For legacy drivers the
1119 * &drm_connector_funcs.dpms callback must update this. For atomic
1120 * drivers, this is handled by the core atomic code, and drivers must
1121 * only take &drm_crtc_state.active into account.
1125 /** @helper_private: mid-layer private data */
1126 const struct drm_connector_helper_funcs *helper_private;
1128 /** @cmdline_mode: mode line parsed from the kernel cmdline for this connector */
1129 struct drm_cmdline_mode cmdline_mode;
1130 /** @force: a DRM_FORCE_<foo> state for forced mode sets */
1131 enum drm_connector_force force;
1132 /** @override_edid: has the EDID been overwritten through debugfs for testing? */
1135 #define DRM_CONNECTOR_MAX_ENCODER 3
1137 * @encoder_ids: Valid encoders for this connector. Please only use
1138 * drm_connector_for_each_possible_encoder() to enumerate these.
1140 uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
1143 * @encoder: Currently bound encoder driving this connector, if any.
1144 * Only really meaningful for non-atomic drivers. Atomic drivers should
1145 * instead look at &drm_connector_state.best_encoder, and in case they
1146 * need the CRTC driving this output, &drm_connector_state.crtc.
1148 struct drm_encoder *encoder;
1150 #define MAX_ELD_BYTES 128
1151 /** @eld: EDID-like data, if present */
1152 uint8_t eld[MAX_ELD_BYTES];
1153 /** @latency_present: AV delay info from ELD, if found */
1154 bool latency_present[2];
1156 * @video_latency: Video latency info from ELD, if found.
1157 * [0]: progressive, [1]: interlaced
1159 int video_latency[2];
1161 * @audio_latency: audio latency info from ELD, if found
1162 * [0]: progressive, [1]: interlaced
1164 int audio_latency[2];
1166 * @null_edid_counter: track sinks that give us all zeros for the EDID.
1167 * Needed to workaround some HW bugs where we get all 0s
1169 int null_edid_counter;
1171 /** @bad_edid_counter: track sinks that give us an EDID with invalid checksum */
1172 unsigned bad_edid_counter;
1175 * @edid_corrupt: Indicates whether the last read EDID was corrupt. Used
1176 * in Displayport compliance testing - Displayport Link CTS Core 1.2
1181 /** @debugfs_entry: debugfs directory for this connector */
1182 struct dentry *debugfs_entry;
1187 * Current atomic state for this connector.
1189 * This is protected by &drm_mode_config.connection_mutex. Note that
1190 * nonblocking atomic commits access the current connector state without
1191 * taking locks. Either by going through the &struct drm_atomic_state
1192 * pointers, see for_each_oldnew_connector_in_state(),
1193 * for_each_old_connector_in_state() and
1194 * for_each_new_connector_in_state(). Or through careful ordering of
1195 * atomic commit operations as implemented in the atomic helpers, see
1196 * &struct drm_crtc_commit.
1198 struct drm_connector_state *state;
1200 /* DisplayID bits. FIXME: Extract into a substruct? */
1205 * DRM blob property data for the tile property (used mostly by DP MST).
1206 * This is meant for screens which are driven through separate display
1207 * pipelines represented by &drm_crtc, which might not be running with
1208 * genlocked clocks. For tiled panels which are genlocked, like
1209 * dual-link LVDS or dual-link DSI, the driver should try to not expose
1210 * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
1212 * This should only be updated by calling
1213 * drm_connector_set_tile_property().
1215 struct drm_property_blob *tile_blob_ptr;
1217 /** @has_tile: is this connector connected to a tiled monitor */
1219 /** @tile_group: tile group for the connected monitor */
1220 struct drm_tile_group *tile_group;
1221 /** @tile_is_single_monitor: whether the tile is one monitor housing */
1222 bool tile_is_single_monitor;
1224 /** @num_h_tile: number of horizontal tiles in the tile group */
1225 /** @num_v_tile: number of vertical tiles in the tile group */
1226 uint8_t num_h_tile, num_v_tile;
1227 /** @tile_h_loc: horizontal location of this tile */
1228 /** @tile_v_loc: vertical location of this tile */
1229 uint8_t tile_h_loc, tile_v_loc;
1230 /** @tile_h_size: horizontal size of this tile. */
1231 /** @tile_v_size: vertical size of this tile. */
1232 uint16_t tile_h_size, tile_v_size;
1237 * List used only by &drm_connector_list_iter to be able to clean up a
1238 * connector from any context, in conjunction with
1239 * &drm_mode_config.connector_free_work.
1241 struct llist_node free_node;
1244 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
1246 int drm_connector_init(struct drm_device *dev,
1247 struct drm_connector *connector,
1248 const struct drm_connector_funcs *funcs,
1249 int connector_type);
1250 void drm_connector_attach_edid_property(struct drm_connector *connector);
1251 int drm_connector_register(struct drm_connector *connector);
1252 void drm_connector_unregister(struct drm_connector *connector);
1253 int drm_connector_attach_encoder(struct drm_connector *connector,
1254 struct drm_encoder *encoder);
1256 void drm_connector_cleanup(struct drm_connector *connector);
1258 static inline unsigned int drm_connector_index(const struct drm_connector *connector)
1260 return connector->index;
1263 static inline u32 drm_connector_mask(const struct drm_connector *connector)
1265 return 1 << connector->index;
1269 * drm_connector_lookup - lookup connector object
1271 * @file_priv: drm file to check for lease against.
1272 * @id: connector object id
1274 * This function looks up the connector object specified by id
1275 * add takes a reference to it.
1277 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
1278 struct drm_file *file_priv,
1281 struct drm_mode_object *mo;
1282 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CONNECTOR);
1283 return mo ? obj_to_connector(mo) : NULL;
1287 * drm_connector_get - acquire a connector reference
1288 * @connector: DRM connector
1290 * This function increments the connector's refcount.
1292 static inline void drm_connector_get(struct drm_connector *connector)
1294 drm_mode_object_get(&connector->base);
1298 * drm_connector_put - release a connector reference
1299 * @connector: DRM connector
1301 * This function decrements the connector's reference count and frees the
1302 * object if the reference count drops to zero.
1304 static inline void drm_connector_put(struct drm_connector *connector)
1306 drm_mode_object_put(&connector->base);
1310 * drm_connector_is_unregistered - has the connector been unregistered from
1312 * @connector: DRM connector
1314 * Checks whether or not @connector has been unregistered from userspace.
1317 * True if the connector was unregistered, false if the connector is
1318 * registered or has not yet been registered with userspace.
1321 drm_connector_is_unregistered(struct drm_connector *connector)
1323 return READ_ONCE(connector->registration_state) ==
1324 DRM_CONNECTOR_UNREGISTERED;
1327 const char *drm_get_connector_status_name(enum drm_connector_status status);
1328 const char *drm_get_subpixel_order_name(enum subpixel_order order);
1329 const char *drm_get_dpms_name(int val);
1330 const char *drm_get_dvi_i_subconnector_name(int val);
1331 const char *drm_get_dvi_i_select_name(int val);
1332 const char *drm_get_tv_subconnector_name(int val);
1333 const char *drm_get_tv_select_name(int val);
1334 const char *drm_get_content_protection_name(int val);
1336 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
1337 int drm_mode_create_tv_margin_properties(struct drm_device *dev);
1338 int drm_mode_create_tv_properties(struct drm_device *dev,
1339 unsigned int num_modes,
1340 const char * const modes[]);
1341 void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
1342 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
1343 int drm_connector_attach_content_type_property(struct drm_connector *dev);
1344 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1345 u32 scaling_mode_mask);
1346 int drm_connector_attach_vrr_capable_property(
1347 struct drm_connector *connector);
1348 int drm_connector_attach_content_protection_property(
1349 struct drm_connector *connector);
1350 int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
1351 int drm_mode_create_colorspace_property(struct drm_connector *connector);
1352 int drm_mode_create_content_type_property(struct drm_device *dev);
1353 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1354 const struct drm_connector_state *conn_state);
1356 int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
1358 int drm_connector_set_path_property(struct drm_connector *connector,
1360 int drm_connector_set_tile_property(struct drm_connector *connector);
1361 int drm_connector_update_edid_property(struct drm_connector *connector,
1362 const struct edid *edid);
1363 void drm_connector_set_link_status_property(struct drm_connector *connector,
1364 uint64_t link_status);
1365 void drm_connector_set_vrr_capable_property(
1366 struct drm_connector *connector, bool capable);
1367 int drm_connector_init_panel_orientation_property(
1368 struct drm_connector *connector, int width, int height);
1369 int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
1373 * struct drm_tile_group - Tile group metadata
1374 * @refcount: reference count
1376 * @id: tile group id exposed to userspace
1377 * @group_data: Sink-private data identifying this group
1379 * @group_data corresponds to displayid vend/prod/serial for external screens
1382 struct drm_tile_group {
1383 struct kref refcount;
1384 struct drm_device *dev;
1389 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1391 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1393 void drm_mode_put_tile_group(struct drm_device *dev,
1394 struct drm_tile_group *tg);
1397 * struct drm_connector_list_iter - connector_list iterator
1399 * This iterator tracks state needed to be able to walk the connector_list
1400 * within struct drm_mode_config. Only use together with
1401 * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and
1402 * drm_connector_list_iter_next() respectively the convenience macro
1403 * drm_for_each_connector_iter().
1405 struct drm_connector_list_iter {
1407 struct drm_device *dev;
1408 struct drm_connector *conn;
1411 void drm_connector_list_iter_begin(struct drm_device *dev,
1412 struct drm_connector_list_iter *iter);
1413 struct drm_connector *
1414 drm_connector_list_iter_next(struct drm_connector_list_iter *iter);
1415 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
1417 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
1418 struct drm_encoder *encoder);
1421 * drm_for_each_connector_iter - connector_list iterator macro
1422 * @connector: &struct drm_connector pointer used as cursor
1423 * @iter: &struct drm_connector_list_iter
1425 * Note that @connector is only valid within the list body, if you want to use
1426 * @connector after calling drm_connector_list_iter_end() then you need to grab
1427 * your own reference first using drm_connector_get().
1429 #define drm_for_each_connector_iter(connector, iter) \
1430 while ((connector = drm_connector_list_iter_next(iter)))
1433 * drm_connector_for_each_possible_encoder - iterate connector's possible encoders
1434 * @connector: &struct drm_connector pointer
1435 * @encoder: &struct drm_encoder pointer used as cursor
1436 * @__i: int iteration cursor, for macro-internal use
1438 #define drm_connector_for_each_possible_encoder(connector, encoder, __i) \
1439 for ((__i) = 0; (__i) < ARRAY_SIZE((connector)->encoder_ids) && \
1440 (connector)->encoder_ids[(__i)] != 0; (__i)++) \
1441 for_each_if((encoder) = \
1442 drm_encoder_find((connector)->dev, NULL, \
1443 (connector)->encoder_ids[(__i)])) \