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/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;
46 enum drm_connector_force {
47 DRM_FORCE_UNSPECIFIED,
49 DRM_FORCE_ON, /* force on analog part normally */
50 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
54 * enum drm_connector_status - status for a &drm_connector
56 * This enum is used to track the connector status. There are no separate
57 * #defines for the uapi!
59 enum drm_connector_status {
61 * @connector_status_connected: The connector is definitely connected to
62 * a sink device, and can be enabled.
64 connector_status_connected = 1,
66 * @connector_status_disconnected: The connector isn't connected to a
67 * sink device which can be autodetect. For digital outputs like DP or
68 * HDMI (which can be realiable probed) this means there's really
69 * nothing there. It is driver-dependent whether a connector with this
70 * status can be lit up or not.
72 connector_status_disconnected = 2,
74 * @connector_status_unknown: The connector's status could not be
75 * reliably detected. This happens when probing would either cause
76 * flicker (like load-detection when the connector is in use), or when a
77 * hardware resource isn't available (like when load-detection needs a
78 * free CRTC). It should be possible to light up the connector with one
79 * of the listed fallback modes. For default configuration userspace
80 * should only try to light up connectors with unknown status when
81 * there's not connector with @connector_status_connected.
83 connector_status_unknown = 3,
87 * enum drm_connector_registration_status - userspace registration status for
90 * This enum is used to track the status of initializing a connector and
91 * registering it with userspace, so that DRM can prevent bogus modesets on
92 * connectors that no longer exist.
94 enum drm_connector_registration_state {
96 * @DRM_CONNECTOR_INITIALIZING: The connector has just been created,
97 * but has yet to be exposed to userspace. There should be no
98 * additional restrictions to how the state of this connector may be
101 DRM_CONNECTOR_INITIALIZING = 0,
104 * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized
105 * and registered with sysfs, as such it has been exposed to
106 * userspace. There should be no additional restrictions to how the
107 * state of this connector may be modified.
109 DRM_CONNECTOR_REGISTERED = 1,
112 * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed
113 * to userspace and has since been unregistered and removed from
114 * userspace, or the connector was unregistered before it had a chance
115 * to be exposed to userspace (e.g. still in the
116 * @DRM_CONNECTOR_INITIALIZING state). When a connector is
117 * unregistered, there are additional restrictions to how its state
120 * - An unregistered connector may only have its DPMS changed from
121 * On->Off. Once DPMS is changed to Off, it may not be switched back
123 * - Modesets are not allowed on unregistered connectors, unless they
124 * would result in disabling its assigned CRTCs. This means
125 * disabling a CRTC on an unregistered connector is OK, but enabling
127 * - Removing a CRTC from an unregistered connector is OK, but new
128 * CRTCs may never be assigned to an unregistered connector.
130 DRM_CONNECTOR_UNREGISTERED = 2,
133 enum subpixel_order {
135 SubPixelHorizontalRGB,
136 SubPixelHorizontalBGR,
144 * struct drm_scrambling: sink's scrambling support.
146 struct drm_scrambling {
148 * @supported: scrambling supported for rates > 340 Mhz.
152 * @low_rates: scrambling supported for rates <= 340 Mhz.
158 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink
160 * Provides SCDC register support and capabilities related information on a
161 * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0.
165 * @supported: status control & data channel present.
169 * @read_request: sink is capable of generating scdc read request.
173 * @scrambling: sink's scrambling capabilities
175 struct drm_scrambling scrambling;
180 * struct drm_hdmi_info - runtime information about the connected HDMI sink
182 * Describes if a given display supports advanced HDMI 2.0 features.
183 * This information is available in CEA-861-F extension blocks (like HF-VSDB).
185 struct drm_hdmi_info {
186 /** @scdc: sink's scdc support and capabilities */
187 struct drm_scdc scdc;
190 * @y420_vdb_modes: bitmap of modes which can support ycbcr420
191 * output only (not normal RGB/YCBCR444/422 outputs). The max VIC
192 * defined by the CEA-861-G spec is 219, so the size is 256 bits to map
195 unsigned long y420_vdb_modes[BITS_TO_LONGS(256)];
198 * @y420_cmdb_modes: bitmap of modes which can support ycbcr420
199 * output also, along with normal HDMI outputs. The max VIC defined by
200 * the CEA-861-G spec is 219, so the size is 256 bits to map up to 256
203 unsigned long y420_cmdb_modes[BITS_TO_LONGS(256)];
205 /** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
208 /** @y420_dc_modes: bitmap of deep color support index */
213 * enum drm_link_status - connector's link_status property value
215 * This enum is used as the connector's link status property value.
216 * It is set to the values defined in uapi.
218 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful
220 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training
223 enum drm_link_status {
224 DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD,
225 DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD,
229 * enum drm_panel_orientation - panel_orientation info for &drm_display_info
231 * This enum is used to track the (LCD) panel orientation. There are no
232 * separate #defines for the uapi!
234 * @DRM_MODE_PANEL_ORIENTATION_UNKNOWN: The drm driver has not provided any
235 * panel orientation information (normal
236 * for non panels) in this case the "panel
237 * orientation" connector prop will not be
239 * @DRM_MODE_PANEL_ORIENTATION_NORMAL: The top side of the panel matches the
240 * top side of the device's casing.
241 * @DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: The top side of the panel matches the
242 * bottom side of the device's casing, iow
243 * the panel is mounted upside-down.
244 * @DRM_MODE_PANEL_ORIENTATION_LEFT_UP: The left side of the panel matches the
245 * top side of the device's casing.
246 * @DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: The right side of the panel matches the
247 * top side of the device's casing.
249 enum drm_panel_orientation {
250 DRM_MODE_PANEL_ORIENTATION_UNKNOWN = -1,
251 DRM_MODE_PANEL_ORIENTATION_NORMAL = 0,
252 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP,
253 DRM_MODE_PANEL_ORIENTATION_LEFT_UP,
254 DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
258 * struct drm_monitor_range_info - Panel's Monitor range in EDID for
261 * This struct is used to store a frequency range supported by panel
262 * as parsed from EDID's detailed monitor range descriptor block.
264 * @min_vfreq: This is the min supported refresh rate in Hz from
265 * EDID's detailed monitor range.
266 * @max_vfreq: This is the max supported refresh rate in Hz from
267 * EDID's detailed monitor range
269 struct drm_monitor_range_info {
275 * This is a consolidated colorimetry list supported by HDMI and
276 * DP protocol standard. The respective connectors will register
277 * a property with the subset of this list (supported by that
278 * respective protocol). Userspace will set the colorspace through
279 * a colorspace property which will be created and exposed to
283 /* For Default case, driver will set the colorspace */
284 #define DRM_MODE_COLORIMETRY_DEFAULT 0
285 /* CEA 861 Normal Colorimetry options */
286 #define DRM_MODE_COLORIMETRY_NO_DATA 0
287 #define DRM_MODE_COLORIMETRY_SMPTE_170M_YCC 1
288 #define DRM_MODE_COLORIMETRY_BT709_YCC 2
289 /* CEA 861 Extended Colorimetry Options */
290 #define DRM_MODE_COLORIMETRY_XVYCC_601 3
291 #define DRM_MODE_COLORIMETRY_XVYCC_709 4
292 #define DRM_MODE_COLORIMETRY_SYCC_601 5
293 #define DRM_MODE_COLORIMETRY_OPYCC_601 6
294 #define DRM_MODE_COLORIMETRY_OPRGB 7
295 #define DRM_MODE_COLORIMETRY_BT2020_CYCC 8
296 #define DRM_MODE_COLORIMETRY_BT2020_RGB 9
297 #define DRM_MODE_COLORIMETRY_BT2020_YCC 10
298 /* Additional Colorimetry extension added as part of CTA 861.G */
299 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65 11
300 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER 12
301 /* Additional Colorimetry Options added for DP 1.4a VSC Colorimetry Format */
302 #define DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED 13
303 #define DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT 14
304 #define DRM_MODE_COLORIMETRY_BT601_YCC 15
307 * enum drm_bus_flags - bus_flags info for &drm_display_info
309 * This enum defines signal polarities and clock edge information for signals on
310 * a bus as bitmask flags.
312 * The clock edge information is conveyed by two sets of symbols,
313 * DRM_BUS_FLAGS_*_DRIVE_\* and DRM_BUS_FLAGS_*_SAMPLE_\*. When this enum is
314 * used to describe a bus from the point of view of the transmitter, the
315 * \*_DRIVE_\* flags should be used. When used from the point of view of the
316 * receiver, the \*_SAMPLE_\* flags should be used. The \*_DRIVE_\* and
317 * \*_SAMPLE_\* flags alias each other, with the \*_SAMPLE_POSEDGE and
318 * \*_SAMPLE_NEGEDGE flags being equal to \*_DRIVE_NEGEDGE and \*_DRIVE_POSEDGE
319 * respectively. This simplifies code as signals are usually sampled on the
320 * opposite edge of the driving edge. Transmitters and receivers may however
321 * need to take other signal timings into account to convert between driving
324 * @DRM_BUS_FLAG_DE_LOW: The Data Enable signal is active low
325 * @DRM_BUS_FLAG_DE_HIGH: The Data Enable signal is active high
326 * @DRM_BUS_FLAG_PIXDATA_POSEDGE: Legacy value, do not use
327 * @DRM_BUS_FLAG_PIXDATA_NEGEDGE: Legacy value, do not use
328 * @DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE: Data is driven on the rising edge of
330 * @DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE: Data is driven on the falling edge of
332 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE: Data is sampled on the rising edge of
334 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE: Data is sampled on the falling edge of
336 * @DRM_BUS_FLAG_DATA_MSB_TO_LSB: Data is transmitted MSB to LSB on the bus
337 * @DRM_BUS_FLAG_DATA_LSB_TO_MSB: Data is transmitted LSB to MSB on the bus
338 * @DRM_BUS_FLAG_SYNC_POSEDGE: Legacy value, do not use
339 * @DRM_BUS_FLAG_SYNC_NEGEDGE: Legacy value, do not use
340 * @DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE: Sync signals are driven on the rising
341 * edge of the pixel clock
342 * @DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE: Sync signals are driven on the falling
343 * edge of the pixel clock
344 * @DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE: Sync signals are sampled on the rising
345 * edge of the pixel clock
346 * @DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE: Sync signals are sampled on the falling
347 * edge of the pixel clock
348 * @DRM_BUS_FLAG_SHARP_SIGNALS: Set if the Sharp-specific signals
349 * (SPL, CLS, PS, REV) must be used
352 DRM_BUS_FLAG_DE_LOW = BIT(0),
353 DRM_BUS_FLAG_DE_HIGH = BIT(1),
354 DRM_BUS_FLAG_PIXDATA_POSEDGE = BIT(2),
355 DRM_BUS_FLAG_PIXDATA_NEGEDGE = BIT(3),
356 DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE,
357 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
358 DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
359 DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE,
360 DRM_BUS_FLAG_DATA_MSB_TO_LSB = BIT(4),
361 DRM_BUS_FLAG_DATA_LSB_TO_MSB = BIT(5),
362 DRM_BUS_FLAG_SYNC_POSEDGE = BIT(6),
363 DRM_BUS_FLAG_SYNC_NEGEDGE = BIT(7),
364 DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE = DRM_BUS_FLAG_SYNC_POSEDGE,
365 DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE,
366 DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE,
367 DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE = DRM_BUS_FLAG_SYNC_POSEDGE,
368 DRM_BUS_FLAG_SHARP_SIGNALS = BIT(8),
372 * struct drm_display_info - runtime data about the connected sink
374 * Describes a given display (e.g. CRT or flat panel) and its limitations. For
375 * fixed display sinks like built-in panels there's not much difference between
376 * this and &struct drm_connector. But for sinks with a real cable this
377 * structure is meant to describe all the things at the other end of the cable.
379 * For sinks which provide an EDID this can be filled out by calling
380 * drm_add_edid_modes().
382 struct drm_display_info {
384 * @width_mm: Physical width in mm.
386 unsigned int width_mm;
389 * @height_mm: Physical height in mm.
391 unsigned int height_mm;
394 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
399 * @subpixel_order: Subpixel order of LCD panels.
401 enum subpixel_order subpixel_order;
403 #define DRM_COLOR_FORMAT_RGB444 (1<<0)
404 #define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
405 #define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
406 #define DRM_COLOR_FORMAT_YCRCB420 (1<<3)
409 * @panel_orientation: Read only connector property for built-in panels,
410 * indicating the orientation of the panel vs the device's casing.
411 * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN.
412 * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the
413 * fb to compensate and gets exported as prop to userspace.
415 int panel_orientation;
418 * @color_formats: HDMI Color formats, selects between RGB and YCrCb
419 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
420 * as used to describe the pixel format in framebuffers, and also don't
421 * match the formats in @bus_formats which are shared with v4l.
426 * @bus_formats: Pixel data format on the wire, somewhat redundant with
427 * @color_formats. Array of size @num_bus_formats encoded using
428 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
430 const u32 *bus_formats;
432 * @num_bus_formats: Size of @bus_formats array.
434 unsigned int num_bus_formats;
437 * @bus_flags: Additional information (like pixel signal polarity) for
438 * the pixel data on the bus, using &enum drm_bus_flags values
444 * @max_tmds_clock: Maximum TMDS clock rate supported by the
445 * sink in kHz. 0 means undefined.
450 * @dvi_dual: Dual-link DVI sink?
455 * @is_hdmi: True if the sink is an HDMI device.
457 * This field shall be used instead of calling
458 * drm_detect_hdmi_monitor() when possible.
463 * @has_hdmi_infoframe: Does the sink support the HDMI infoframe?
465 bool has_hdmi_infoframe;
468 * @rgb_quant_range_selectable: Does the sink support selecting
469 * the RGB quantization range?
471 bool rgb_quant_range_selectable;
474 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
475 * more stuff redundant with @bus_formats.
477 u8 edid_hdmi_dc_modes;
480 * @cea_rev: CEA revision of the HDMI sink.
485 * @hdmi: advance features of a HDMI sink.
487 struct drm_hdmi_info hdmi;
490 * @non_desktop: Non desktop display (HMD).
495 * @monitor_range: Frequency range supported by monitor range descriptor
497 struct drm_monitor_range_info monitor_range;
500 int drm_display_info_set_bus_formats(struct drm_display_info *info,
502 unsigned int num_formats);
505 * struct drm_connector_tv_margins - TV connector related margins
507 * Describes the margins in pixels to put around the image on TV
508 * connectors to deal with overscan.
510 struct drm_connector_tv_margins {
512 * @bottom: Bottom margin in pixels.
517 * @left: Left margin in pixels.
522 * @right: Right margin in pixels.
527 * @top: Top margin in pixels.
533 * struct drm_tv_connector_state - TV connector related states
534 * @subconnector: selected subconnector
535 * @margins: TV margins
537 * @brightness: brightness in percent
538 * @contrast: contrast in percent
539 * @flicker_reduction: flicker reduction in percent
540 * @overscan: overscan in percent
541 * @saturation: saturation in percent
542 * @hue: hue in percent
544 struct drm_tv_connector_state {
545 enum drm_mode_subconnector subconnector;
546 struct drm_connector_tv_margins margins;
548 unsigned int brightness;
549 unsigned int contrast;
550 unsigned int flicker_reduction;
551 unsigned int overscan;
552 unsigned int saturation;
557 * struct drm_connector_state - mutable connector state
559 struct drm_connector_state {
560 /** @connector: backpointer to the connector */
561 struct drm_connector *connector;
564 * @crtc: CRTC to connect connector to, NULL if disabled.
566 * Do not change this directly, use drm_atomic_set_crtc_for_connector()
569 struct drm_crtc *crtc;
574 * Used by the atomic helpers to select the encoder, through the
575 * &drm_connector_helper_funcs.atomic_best_encoder or
576 * &drm_connector_helper_funcs.best_encoder callbacks.
578 * This is also used in the atomic helpers to map encoders to their
579 * current and previous connectors, see
580 * drm_atomic_get_old_connector_for_encoder() and
581 * drm_atomic_get_new_connector_for_encoder().
583 * NOTE: Atomic drivers must fill this out (either themselves or through
584 * helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will
585 * not return correct data to userspace.
587 struct drm_encoder *best_encoder;
590 * @link_status: Connector link_status to keep track of whether link is
591 * GOOD or BAD to notify userspace if retraining is necessary.
593 enum drm_link_status link_status;
595 /** @state: backpointer to global drm_atomic_state */
596 struct drm_atomic_state *state;
599 * @commit: Tracks the pending commit to prevent use-after-free conditions.
601 * Is only set when @crtc is NULL.
603 struct drm_crtc_commit *commit;
605 /** @tv: TV connector state */
606 struct drm_tv_connector_state tv;
609 * @self_refresh_aware:
611 * This tracks whether a connector is aware of the self refresh state.
612 * It should be set to true for those connector implementations which
613 * understand the self refresh state. This is needed since the crtc
614 * registers the self refresh helpers and it doesn't know if the
615 * connectors downstream have implemented self refresh entry/exit.
617 * Drivers should set this to true in atomic_check if they know how to
618 * handle self_refresh requests.
620 bool self_refresh_aware;
623 * @picture_aspect_ratio: Connector property to control the
624 * HDMI infoframe aspect ratio setting.
626 * The %DRM_MODE_PICTURE_ASPECT_\* values much match the
627 * values for &enum hdmi_picture_aspect
629 enum hdmi_picture_aspect picture_aspect_ratio;
632 * @content_type: Connector property to control the
633 * HDMI infoframe content type setting.
634 * The %DRM_MODE_CONTENT_TYPE_\* values much
637 unsigned int content_type;
640 * @hdcp_content_type: Connector property to pass the type of
641 * protected content. This is most commonly used for HDCP.
643 unsigned int hdcp_content_type;
646 * @scaling_mode: Connector property to control the
647 * upscaling, mostly used for built-in panels.
649 unsigned int scaling_mode;
652 * @content_protection: Connector property to request content
653 * protection. This is most commonly used for HDCP.
655 unsigned int content_protection;
658 * @colorspace: State variable for Connector property to request
659 * colorspace change on Sink. This is most commonly used to switch
660 * to wider color gamuts like BT2020.
665 * @writeback_job: Writeback job for writeback connectors
667 * Holds the framebuffer and out-fence for a writeback connector. As
668 * the writeback completion may be asynchronous to the normal commit
669 * cycle, the writeback job lifetime is managed separately from the
670 * normal atomic state by this object.
672 * See also: drm_writeback_queue_job() and
673 * drm_writeback_signal_completion()
675 struct drm_writeback_job *writeback_job;
678 * @max_requested_bpc: Connector property to limit the maximum bit
679 * depth of the pixels.
681 u8 max_requested_bpc;
684 * @max_bpc: Connector max_bpc based on the requested max_bpc property
685 * and the connector bpc limitations obtained from edid.
690 * @hdr_output_metadata:
691 * DRM blob property for HDR output metadata
693 struct drm_property_blob *hdr_output_metadata;
697 * struct drm_connector_funcs - control connectors on a given device
699 * Each CRTC may have one or more connectors attached to it. The functions
700 * below allow the core DRM code to control connectors, enumerate available modes,
703 struct drm_connector_funcs {
707 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
708 * is exposed as a standard property on the connector, but diverted to
709 * this callback in the drm core. Note that atomic drivers don't
710 * implement the 4 level DPMS support on the connector any more, but
711 * instead only have an on/off "ACTIVE" property on the CRTC object.
713 * This hook is not used by atomic drivers, remapping of the legacy DPMS
714 * property is entirely handled in the DRM core.
718 * 0 on success or a negative error code on failure.
720 int (*dpms)(struct drm_connector *connector, int mode);
725 * Reset connector hardware and software state to off. This function isn't
726 * called by the core directly, only through drm_mode_config_reset().
727 * It's not a helper hook only for historical reasons.
729 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
730 * atomic state using this hook.
732 void (*reset)(struct drm_connector *connector);
737 * Check to see if anything is attached to the connector. The parameter
738 * force is set to false whilst polling, true when checking the
739 * connector due to a user request. force can be used by the driver to
740 * avoid expensive, destructive operations during automated probing.
742 * This callback is optional, if not implemented the connector will be
743 * considered as always being attached.
747 * Note that this hook is only called by the probe helper. It's not in
748 * the helper library vtable purely for historical reasons. The only DRM
749 * core entry point to probe connector state is @fill_modes.
751 * Note that the helper library will already hold
752 * &drm_mode_config.connection_mutex. Drivers which need to grab additional
753 * locks to avoid races with concurrent modeset changes need to use
754 * &drm_connector_helper_funcs.detect_ctx instead.
758 * drm_connector_status indicating the connector's status.
760 enum drm_connector_status (*detect)(struct drm_connector *connector,
766 * This function is called to update internal encoder state when the
767 * connector is forced to a certain state by userspace, either through
768 * the sysfs interfaces or on the kernel cmdline. In that case the
769 * @detect callback isn't called.
773 * Note that this hook is only called by the probe helper. It's not in
774 * the helper library vtable purely for historical reasons. The only DRM
775 * core entry point to probe connector state is @fill_modes.
777 void (*force)(struct drm_connector *connector);
782 * Entry point for output detection and basic mode validation. The
783 * driver should reprobe the output if needed (e.g. when hotplug
784 * handling is unreliable), add all detected modes to &drm_connector.modes
785 * and filter out any the device can't support in any configuration. It
786 * also needs to filter out any modes wider or higher than the
787 * parameters max_width and max_height indicate.
789 * The drivers must also prune any modes no longer valid from
790 * &drm_connector.modes. Furthermore it must update
791 * &drm_connector.status and &drm_connector.edid. If no EDID has been
792 * received for this output connector->edid must be NULL.
794 * Drivers using the probe helpers should use
795 * drm_helper_probe_single_connector_modes() to implement this
800 * The number of modes detected and filled into &drm_connector.modes.
802 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
807 * This is the legacy entry point to update a property attached to the
810 * This callback is optional if the driver does not support any legacy
811 * driver-private properties. For atomic drivers it is not used because
812 * property handling is done entirely in the DRM core.
816 * 0 on success or a negative error code on failure.
818 int (*set_property)(struct drm_connector *connector, struct drm_property *property,
824 * This optional hook can be used to register additional userspace
825 * interfaces attached to the connector, light backlight control, i2c,
826 * DP aux or similar interfaces. It is called late in the driver load
827 * sequence from drm_connector_register() when registering all the
828 * core drm connector interfaces. Everything added from this callback
829 * should be unregistered in the early_unregister callback.
831 * This is called while holding &drm_connector.mutex.
835 * 0 on success, or a negative error code on failure.
837 int (*late_register)(struct drm_connector *connector);
842 * This optional hook should be used to unregister the additional
843 * userspace interfaces attached to the connector from
844 * late_register(). It is called from drm_connector_unregister(),
845 * early in the driver unload sequence to disable userspace access
846 * before data structures are torndown.
848 * This is called while holding &drm_connector.mutex.
850 void (*early_unregister)(struct drm_connector *connector);
855 * Clean up connector resources. This is called at driver unload time
856 * through drm_mode_config_cleanup(). It can also be called at runtime
857 * when a connector is being hot-unplugged for drivers that support
858 * connector hotplugging (e.g. DisplayPort MST).
860 void (*destroy)(struct drm_connector *connector);
863 * @atomic_duplicate_state:
865 * Duplicate the current atomic state for this connector and return it.
866 * The core and helpers guarantee that any atomic state duplicated with
867 * this hook and still owned by the caller (i.e. not transferred to the
868 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
869 * cleaned up by calling the @atomic_destroy_state hook in this
872 * This callback is mandatory for atomic drivers.
874 * Atomic drivers which don't subclass &struct drm_connector_state should use
875 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
876 * state structure to extend it with driver-private state should use
877 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
878 * duplicated in a consistent fashion across drivers.
880 * It is an error to call this hook before &drm_connector.state has been
881 * initialized correctly.
885 * If the duplicate state references refcounted resources this hook must
886 * acquire a reference for each of them. The driver must release these
887 * references again in @atomic_destroy_state.
891 * Duplicated atomic state or NULL when the allocation failed.
893 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
896 * @atomic_destroy_state:
898 * Destroy a state duplicated with @atomic_duplicate_state and release
899 * or unreference all resources it references
901 * This callback is mandatory for atomic drivers.
903 void (*atomic_destroy_state)(struct drm_connector *connector,
904 struct drm_connector_state *state);
907 * @atomic_set_property:
909 * Decode a driver-private property value and store the decoded value
910 * into the passed-in state structure. Since the atomic core decodes all
911 * standardized properties (even for extensions beyond the core set of
912 * properties which might not be implemented by all drivers) this
913 * requires drivers to subclass the state structure.
915 * Such driver-private properties should really only be implemented for
916 * truly hardware/vendor specific state. Instead it is preferred to
917 * standardize atomic extension and decode the properties used to expose
918 * such an extension in the core.
920 * Do not call this function directly, use
921 * drm_atomic_connector_set_property() instead.
923 * This callback is optional if the driver does not support any
924 * driver-private atomic properties.
928 * This function is called in the state assembly phase of atomic
929 * modesets, which can be aborted for any reason (including on
930 * userspace's request to just check whether a configuration would be
931 * possible). Drivers MUST NOT touch any persistent state (hardware or
932 * software) or data structures except the passed in @state parameter.
934 * Also since userspace controls in which order properties are set this
935 * function must not do any input validation (since the state update is
936 * incomplete and hence likely inconsistent). Instead any such input
937 * validation must be done in the various atomic_check callbacks.
941 * 0 if the property has been found, -EINVAL if the property isn't
942 * implemented by the driver (which shouldn't ever happen, the core only
943 * asks for properties attached to this connector). No other validation
944 * is allowed by the driver. The core already checks that the property
945 * value is within the range (integer, valid enum value, ...) the driver
946 * set when registering the property.
948 int (*atomic_set_property)(struct drm_connector *connector,
949 struct drm_connector_state *state,
950 struct drm_property *property,
954 * @atomic_get_property:
956 * Reads out the decoded driver-private property. This is used to
957 * implement the GETCONNECTOR IOCTL.
959 * Do not call this function directly, use
960 * drm_atomic_connector_get_property() instead.
962 * This callback is optional if the driver does not support any
963 * driver-private atomic properties.
967 * 0 on success, -EINVAL if the property isn't implemented by the
968 * driver (which shouldn't ever happen, the core only asks for
969 * properties attached to this connector).
971 int (*atomic_get_property)(struct drm_connector *connector,
972 const struct drm_connector_state *state,
973 struct drm_property *property,
977 * @atomic_print_state:
979 * If driver subclasses &struct drm_connector_state, it should implement
980 * this optional hook for printing additional driver specific state.
982 * Do not call this directly, use drm_atomic_connector_print_state()
985 void (*atomic_print_state)(struct drm_printer *p,
986 const struct drm_connector_state *state);
990 * struct drm_cmdline_mode - DRM Mode passed through the kernel command-line
992 * Each connector can have an initial mode with additional options
993 * passed through the kernel command line. This structure allows to
994 * express those parameters and will be filled by the command-line
997 struct drm_cmdline_mode {
1003 char name[DRM_DISPLAY_MODE_LEN];
1008 * Has a mode been read from the command-line?
1013 * @refresh_specified:
1015 * Did the mode have a preferred refresh rate?
1017 bool refresh_specified;
1022 * Did the mode have a preferred BPP?
1029 * Active resolution on the X axis, in pixels.
1036 * Active resolution on the Y axis, in pixels.
1043 * Bits per pixels for the mode.
1050 * Refresh rate, in Hertz.
1057 * Do we need to use reduced blanking?
1064 * The mode is interlaced.
1071 * The timings will be calculated using the VESA Coordinated
1072 * Video Timings instead of looking up the mode from a table.
1079 * Add margins to the mode calculation (1.8% of xres rounded
1080 * down to 8 pixels and 1.8% of yres).
1087 * Ignore the hotplug state of the connector, and force its
1088 * state to one of the DRM_FORCE_* values.
1090 enum drm_connector_force force;
1093 * @rotation_reflection:
1095 * Initial rotation and reflection of the mode setup from the
1096 * command line. See DRM_MODE_ROTATE_* and
1097 * DRM_MODE_REFLECT_*. The only rotations supported are
1098 * DRM_MODE_ROTATE_0 and DRM_MODE_ROTATE_180.
1100 unsigned int rotation_reflection;
1103 * @panel_orientation:
1105 * drm-connector "panel orientation" property override value,
1106 * DRM_MODE_PANEL_ORIENTATION_UNKNOWN if not set.
1108 enum drm_panel_orientation panel_orientation;
1111 * @tv_margins: TV margins to apply to the mode.
1113 struct drm_connector_tv_margins tv_margins;
1117 * struct drm_connector - central DRM connector control structure
1119 * Each connector may be connected to one or more CRTCs, or may be clonable by
1120 * another connector if they can share a CRTC. Each connector also has a specific
1121 * position in the broader display (referred to as a 'screen' though it could
1122 * span multiple monitors).
1124 struct drm_connector {
1125 /** @dev: parent DRM device */
1126 struct drm_device *dev;
1127 /** @kdev: kernel device for sysfs attributes */
1128 struct device *kdev;
1129 /** @attr: sysfs attributes */
1130 struct device_attribute *attr;
1135 * List of all connectors on a @dev, linked from
1136 * &drm_mode_config.connector_list. Protected by
1137 * &drm_mode_config.connector_list_lock, but please only use
1138 * &drm_connector_list_iter to walk this list.
1140 struct list_head head;
1142 /** @base: base KMS object */
1143 struct drm_mode_object base;
1145 /** @name: human readable name, can be overwritten by the driver */
1149 * @mutex: Lock for general connector state, but currently only protects
1150 * @registered. Most of the connector state is still protected by
1151 * &drm_mode_config.mutex.
1156 * @index: Compacted connector index, which matches the position inside
1157 * the mode_config.list for drivers not supporting hot-add/removing. Can
1158 * be used as an array index. It is invariant over the lifetime of the
1165 * one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
1168 /** @connector_type_id: index into connector type enum */
1169 int connector_type_id;
1171 * @interlace_allowed:
1172 * Can this connector handle interlaced modes? Only used by
1173 * drm_helper_probe_single_connector_modes() for mode filtering.
1175 bool interlace_allowed;
1177 * @doublescan_allowed:
1178 * Can this connector handle doublescan? Only used by
1179 * drm_helper_probe_single_connector_modes() for mode filtering.
1181 bool doublescan_allowed;
1184 * Can this connector handle stereo modes? Only used by
1185 * drm_helper_probe_single_connector_modes() for mode filtering.
1187 bool stereo_allowed;
1190 * @ycbcr_420_allowed : This bool indicates if this connector is
1191 * capable of handling YCBCR 420 output. While parsing the EDID
1192 * blocks it's very helpful to know if the source is capable of
1193 * handling YCBCR 420 outputs.
1195 bool ycbcr_420_allowed;
1198 * @registration_state: Is this connector initializing, exposed
1199 * (registered) with userspace, or unregistered?
1201 * Protected by @mutex.
1203 enum drm_connector_registration_state registration_state;
1207 * Modes available on this connector (from fill_modes() + user).
1208 * Protected by &drm_mode_config.mutex.
1210 struct list_head modes;
1214 * One of the drm_connector_status enums (connected, not, or unknown).
1215 * Protected by &drm_mode_config.mutex.
1217 enum drm_connector_status status;
1221 * These are modes added by probing with DDC or the BIOS, before
1222 * filtering is applied. Used by the probe helpers. Protected by
1223 * &drm_mode_config.mutex.
1225 struct list_head probed_modes;
1228 * @display_info: Display information is filled from EDID information
1229 * when a display is detected. For non hot-pluggable displays such as
1230 * flat panels in embedded systems, the driver should initialize the
1231 * &drm_display_info.width_mm and &drm_display_info.height_mm fields
1232 * with the physical size of the display.
1234 * Protected by &drm_mode_config.mutex.
1236 struct drm_display_info display_info;
1238 /** @funcs: connector control functions */
1239 const struct drm_connector_funcs *funcs;
1242 * @edid_blob_ptr: DRM property containing EDID if present. Protected by
1243 * &drm_mode_config.mutex. This should be updated only by calling
1244 * drm_connector_update_edid_property().
1246 struct drm_property_blob *edid_blob_ptr;
1248 /** @properties: property tracking for this connector */
1249 struct drm_object_properties properties;
1252 * @scaling_mode_property: Optional atomic property to control the
1253 * upscaling. See drm_connector_attach_content_protection_property().
1255 struct drm_property *scaling_mode_property;
1258 * @vrr_capable_property: Optional property to help userspace
1259 * query hardware support for variable refresh rate on a connector.
1260 * connector. Drivers can add the property to a connector by
1261 * calling drm_connector_attach_vrr_capable_property().
1263 * This should be updated only by calling
1264 * drm_connector_set_vrr_capable_property().
1266 struct drm_property *vrr_capable_property;
1269 * @colorspace_property: Connector property to set the suitable
1270 * colorspace supported by the sink.
1272 struct drm_property *colorspace_property;
1277 * DRM blob property data for the DP MST path property. This should only
1278 * be updated by calling drm_connector_set_path_property().
1280 struct drm_property_blob *path_blob_ptr;
1283 * @max_bpc_property: Default connector property for the max bpc to be
1284 * driven out of the connector.
1286 struct drm_property *max_bpc_property;
1288 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
1289 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
1290 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
1295 * Connector polling mode, a combination of
1297 * DRM_CONNECTOR_POLL_HPD
1298 * The connector generates hotplug events and doesn't need to be
1299 * periodically polled. The CONNECT and DISCONNECT flags must not
1300 * be set together with the HPD flag.
1302 * DRM_CONNECTOR_POLL_CONNECT
1303 * Periodically poll the connector for connection.
1305 * DRM_CONNECTOR_POLL_DISCONNECT
1306 * Periodically poll the connector for disconnection, without
1307 * causing flickering even when the connector is in use. DACs should
1308 * rarely do this without a lot of testing.
1310 * Set to 0 for connectors that don't support connection status
1316 * @dpms: Current dpms state. For legacy drivers the
1317 * &drm_connector_funcs.dpms callback must update this. For atomic
1318 * drivers, this is handled by the core atomic code, and drivers must
1319 * only take &drm_crtc_state.active into account.
1323 /** @helper_private: mid-layer private data */
1324 const struct drm_connector_helper_funcs *helper_private;
1326 /** @cmdline_mode: mode line parsed from the kernel cmdline for this connector */
1327 struct drm_cmdline_mode cmdline_mode;
1328 /** @force: a DRM_FORCE_<foo> state for forced mode sets */
1329 enum drm_connector_force force;
1330 /** @override_edid: has the EDID been overwritten through debugfs for testing? */
1334 * @possible_encoders: Bit mask of encoders that can drive this
1335 * connector, drm_encoder_index() determines the index into the bitfield
1336 * and the bits are set with drm_connector_attach_encoder().
1338 u32 possible_encoders;
1341 * @encoder: Currently bound encoder driving this connector, if any.
1342 * Only really meaningful for non-atomic drivers. Atomic drivers should
1343 * instead look at &drm_connector_state.best_encoder, and in case they
1344 * need the CRTC driving this output, &drm_connector_state.crtc.
1346 struct drm_encoder *encoder;
1348 #define MAX_ELD_BYTES 128
1349 /** @eld: EDID-like data, if present */
1350 uint8_t eld[MAX_ELD_BYTES];
1351 /** @latency_present: AV delay info from ELD, if found */
1352 bool latency_present[2];
1354 * @video_latency: Video latency info from ELD, if found.
1355 * [0]: progressive, [1]: interlaced
1357 int video_latency[2];
1359 * @audio_latency: audio latency info from ELD, if found
1360 * [0]: progressive, [1]: interlaced
1362 int audio_latency[2];
1365 * @ddc: associated ddc adapter.
1366 * A connector usually has its associated ddc adapter. If a driver uses
1367 * this field, then an appropriate symbolic link is created in connector
1368 * sysfs directory to make it easy for the user to tell which i2c
1369 * adapter is for a particular display.
1371 * The field should be set by calling drm_connector_init_with_ddc().
1373 struct i2c_adapter *ddc;
1376 * @null_edid_counter: track sinks that give us all zeros for the EDID.
1377 * Needed to workaround some HW bugs where we get all 0s
1379 int null_edid_counter;
1381 /** @bad_edid_counter: track sinks that give us an EDID with invalid checksum */
1382 unsigned bad_edid_counter;
1385 * @edid_corrupt: Indicates whether the last read EDID was corrupt. Used
1386 * in Displayport compliance testing - Displayport Link CTS Core 1.2
1391 * @real_edid_checksum: real edid checksum for corrupted edid block.
1392 * Required in Displayport 1.4 compliance testing
1395 u8 real_edid_checksum;
1397 /** @debugfs_entry: debugfs directory for this connector */
1398 struct dentry *debugfs_entry;
1403 * Current atomic state for this connector.
1405 * This is protected by &drm_mode_config.connection_mutex. Note that
1406 * nonblocking atomic commits access the current connector state without
1407 * taking locks. Either by going through the &struct drm_atomic_state
1408 * pointers, see for_each_oldnew_connector_in_state(),
1409 * for_each_old_connector_in_state() and
1410 * for_each_new_connector_in_state(). Or through careful ordering of
1411 * atomic commit operations as implemented in the atomic helpers, see
1412 * &struct drm_crtc_commit.
1414 struct drm_connector_state *state;
1416 /* DisplayID bits. FIXME: Extract into a substruct? */
1421 * DRM blob property data for the tile property (used mostly by DP MST).
1422 * This is meant for screens which are driven through separate display
1423 * pipelines represented by &drm_crtc, which might not be running with
1424 * genlocked clocks. For tiled panels which are genlocked, like
1425 * dual-link LVDS or dual-link DSI, the driver should try to not expose
1426 * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
1428 * This should only be updated by calling
1429 * drm_connector_set_tile_property().
1431 struct drm_property_blob *tile_blob_ptr;
1433 /** @has_tile: is this connector connected to a tiled monitor */
1435 /** @tile_group: tile group for the connected monitor */
1436 struct drm_tile_group *tile_group;
1437 /** @tile_is_single_monitor: whether the tile is one monitor housing */
1438 bool tile_is_single_monitor;
1440 /** @num_h_tile: number of horizontal tiles in the tile group */
1441 /** @num_v_tile: number of vertical tiles in the tile group */
1442 uint8_t num_h_tile, num_v_tile;
1443 /** @tile_h_loc: horizontal location of this tile */
1444 /** @tile_v_loc: vertical location of this tile */
1445 uint8_t tile_h_loc, tile_v_loc;
1446 /** @tile_h_size: horizontal size of this tile. */
1447 /** @tile_v_size: vertical size of this tile. */
1448 uint16_t tile_h_size, tile_v_size;
1453 * List used only by &drm_connector_list_iter to be able to clean up a
1454 * connector from any context, in conjunction with
1455 * &drm_mode_config.connector_free_work.
1457 struct llist_node free_node;
1459 /** @hdr_sink_metadata: HDR Metadata Information read from sink */
1460 struct hdr_sink_metadata hdr_sink_metadata;
1463 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
1465 int drm_connector_init(struct drm_device *dev,
1466 struct drm_connector *connector,
1467 const struct drm_connector_funcs *funcs,
1468 int connector_type);
1469 int drm_connector_init_with_ddc(struct drm_device *dev,
1470 struct drm_connector *connector,
1471 const struct drm_connector_funcs *funcs,
1473 struct i2c_adapter *ddc);
1474 void drm_connector_attach_edid_property(struct drm_connector *connector);
1475 int drm_connector_register(struct drm_connector *connector);
1476 void drm_connector_unregister(struct drm_connector *connector);
1477 int drm_connector_attach_encoder(struct drm_connector *connector,
1478 struct drm_encoder *encoder);
1480 void drm_connector_cleanup(struct drm_connector *connector);
1482 static inline unsigned int drm_connector_index(const struct drm_connector *connector)
1484 return connector->index;
1487 static inline u32 drm_connector_mask(const struct drm_connector *connector)
1489 return 1 << connector->index;
1493 * drm_connector_lookup - lookup connector object
1495 * @file_priv: drm file to check for lease against.
1496 * @id: connector object id
1498 * This function looks up the connector object specified by id
1499 * add takes a reference to it.
1501 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
1502 struct drm_file *file_priv,
1505 struct drm_mode_object *mo;
1506 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CONNECTOR);
1507 return mo ? obj_to_connector(mo) : NULL;
1511 * drm_connector_get - acquire a connector reference
1512 * @connector: DRM connector
1514 * This function increments the connector's refcount.
1516 static inline void drm_connector_get(struct drm_connector *connector)
1518 drm_mode_object_get(&connector->base);
1522 * drm_connector_put - release a connector reference
1523 * @connector: DRM connector
1525 * This function decrements the connector's reference count and frees the
1526 * object if the reference count drops to zero.
1528 static inline void drm_connector_put(struct drm_connector *connector)
1530 drm_mode_object_put(&connector->base);
1534 * drm_connector_is_unregistered - has the connector been unregistered from
1536 * @connector: DRM connector
1538 * Checks whether or not @connector has been unregistered from userspace.
1541 * True if the connector was unregistered, false if the connector is
1542 * registered or has not yet been registered with userspace.
1545 drm_connector_is_unregistered(struct drm_connector *connector)
1547 return READ_ONCE(connector->registration_state) ==
1548 DRM_CONNECTOR_UNREGISTERED;
1551 const char *drm_get_connector_type_name(unsigned int connector_type);
1552 const char *drm_get_connector_status_name(enum drm_connector_status status);
1553 const char *drm_get_subpixel_order_name(enum subpixel_order order);
1554 const char *drm_get_dpms_name(int val);
1555 const char *drm_get_dvi_i_subconnector_name(int val);
1556 const char *drm_get_dvi_i_select_name(int val);
1557 const char *drm_get_tv_subconnector_name(int val);
1558 const char *drm_get_tv_select_name(int val);
1559 const char *drm_get_content_protection_name(int val);
1560 const char *drm_get_hdcp_content_type_name(int val);
1562 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
1563 int drm_mode_create_tv_margin_properties(struct drm_device *dev);
1564 int drm_mode_create_tv_properties(struct drm_device *dev,
1565 unsigned int num_modes,
1566 const char * const modes[]);
1567 void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
1568 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
1569 int drm_connector_attach_content_type_property(struct drm_connector *dev);
1570 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1571 u32 scaling_mode_mask);
1572 int drm_connector_attach_vrr_capable_property(
1573 struct drm_connector *connector);
1574 int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
1575 int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector);
1576 int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);
1577 int drm_mode_create_content_type_property(struct drm_device *dev);
1578 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1579 const struct drm_connector_state *conn_state);
1581 int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
1583 int drm_connector_set_path_property(struct drm_connector *connector,
1585 int drm_connector_set_tile_property(struct drm_connector *connector);
1586 int drm_connector_update_edid_property(struct drm_connector *connector,
1587 const struct edid *edid);
1588 void drm_connector_set_link_status_property(struct drm_connector *connector,
1589 uint64_t link_status);
1590 void drm_connector_set_vrr_capable_property(
1591 struct drm_connector *connector, bool capable);
1592 int drm_connector_set_panel_orientation(
1593 struct drm_connector *connector,
1594 enum drm_panel_orientation panel_orientation);
1595 int drm_connector_set_panel_orientation_with_quirk(
1596 struct drm_connector *connector,
1597 enum drm_panel_orientation panel_orientation,
1598 int width, int height);
1599 int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
1603 * struct drm_tile_group - Tile group metadata
1604 * @refcount: reference count
1606 * @id: tile group id exposed to userspace
1607 * @group_data: Sink-private data identifying this group
1609 * @group_data corresponds to displayid vend/prod/serial for external screens
1612 struct drm_tile_group {
1613 struct kref refcount;
1614 struct drm_device *dev;
1619 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1620 const char topology[8]);
1621 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1622 const char topology[8]);
1623 void drm_mode_put_tile_group(struct drm_device *dev,
1624 struct drm_tile_group *tg);
1627 * struct drm_connector_list_iter - connector_list iterator
1629 * This iterator tracks state needed to be able to walk the connector_list
1630 * within struct drm_mode_config. Only use together with
1631 * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and
1632 * drm_connector_list_iter_next() respectively the convenience macro
1633 * drm_for_each_connector_iter().
1635 struct drm_connector_list_iter {
1637 struct drm_device *dev;
1638 struct drm_connector *conn;
1641 void drm_connector_list_iter_begin(struct drm_device *dev,
1642 struct drm_connector_list_iter *iter);
1643 struct drm_connector *
1644 drm_connector_list_iter_next(struct drm_connector_list_iter *iter);
1645 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
1647 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
1648 struct drm_encoder *encoder);
1651 * drm_for_each_connector_iter - connector_list iterator macro
1652 * @connector: &struct drm_connector pointer used as cursor
1653 * @iter: &struct drm_connector_list_iter
1655 * Note that @connector is only valid within the list body, if you want to use
1656 * @connector after calling drm_connector_list_iter_end() then you need to grab
1657 * your own reference first using drm_connector_get().
1659 #define drm_for_each_connector_iter(connector, iter) \
1660 while ((connector = drm_connector_list_iter_next(iter)))
1663 * drm_connector_for_each_possible_encoder - iterate connector's possible encoders
1664 * @connector: &struct drm_connector pointer
1665 * @encoder: &struct drm_encoder pointer used as cursor
1667 #define drm_connector_for_each_possible_encoder(connector, encoder) \
1668 drm_for_each_encoder_mask(encoder, (connector)->dev, \
1669 (connector)->possible_encoders)