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1/*
2 * Copyright (c) 2016 Intel Corporation
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23#ifndef __DRM_CONNECTOR_H__
24#define __DRM_CONNECTOR_H__
25
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>
32
33#include <uapi/drm/drm_mode.h>
34
35struct drm_connector_helper_funcs;
36struct drm_modeset_acquire_ctx;
37struct drm_device;
38struct drm_crtc;
39struct drm_encoder;
40struct drm_property;
41struct drm_property_blob;
42struct drm_printer;
43struct edid;
44struct i2c_adapter;
45
46enum drm_connector_force {
47 DRM_FORCE_UNSPECIFIED,
48 DRM_FORCE_OFF,
49 DRM_FORCE_ON, /* force on analog part normally */
50 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
51};
52
53/**
54 * enum drm_connector_status - status for a &drm_connector
55 *
56 * This enum is used to track the connector status. There are no separate
57 * #defines for the uapi!
58 */
59enum drm_connector_status {
60 /**
61 * @connector_status_connected: The connector is definitely connected to
62 * a sink device, and can be enabled.
63 */
64 connector_status_connected = 1,
65 /**
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.
71 */
72 connector_status_disconnected = 2,
73 /**
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.
82 */
83 connector_status_unknown = 3,
84};
85
86/**
87 * enum drm_connector_registration_status - userspace registration status for
88 * a &drm_connector
89 *
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.
93 */
94enum drm_connector_registration_state {
95 /**
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
99 * modified.
100 */
101 DRM_CONNECTOR_INITIALIZING = 0,
102
103 /**
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.
108 */
109 DRM_CONNECTOR_REGISTERED = 1,
110
111 /**
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
118 * may be modified:
119 *
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
122 * to On.
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
126 * one is not.
127 * - Removing a CRTC from an unregistered connector is OK, but new
128 * CRTCs may never be assigned to an unregistered connector.
129 */
130 DRM_CONNECTOR_UNREGISTERED = 2,
131};
132
133enum subpixel_order {
134 SubPixelUnknown = 0,
135 SubPixelHorizontalRGB,
136 SubPixelHorizontalBGR,
137 SubPixelVerticalRGB,
138 SubPixelVerticalBGR,
139 SubPixelNone,
140
141};
142
143/**
144 * struct drm_scrambling: sink's scrambling support.
145 */
146struct drm_scrambling {
147 /**
148 * @supported: scrambling supported for rates > 340 Mhz.
149 */
150 bool supported;
151 /**
152 * @low_rates: scrambling supported for rates <= 340 Mhz.
153 */
154 bool low_rates;
155};
156
157/*
158 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink
159 *
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.
162 */
163struct drm_scdc {
164 /**
165 * @supported: status control & data channel present.
166 */
167 bool supported;
168 /**
169 * @read_request: sink is capable of generating scdc read request.
170 */
171 bool read_request;
172 /**
173 * @scrambling: sink's scrambling capabilities
174 */
175 struct drm_scrambling scrambling;
176};
177
178
179/**
180 * struct drm_hdmi_info - runtime information about the connected HDMI sink
181 *
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).
184 */
185struct drm_hdmi_info {
186 /** @scdc: sink's scdc support and capabilities */
187 struct drm_scdc scdc;
188
189 /**
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
193 * up to 256 VICs.
194 */
195 unsigned long y420_vdb_modes[BITS_TO_LONGS(256)];
196
197 /**
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
201 * VICs.
202 */
203 unsigned long y420_cmdb_modes[BITS_TO_LONGS(256)];
204
205 /** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
206 u64 y420_cmdb_map;
207
208 /** @y420_dc_modes: bitmap of deep color support index */
209 u8 y420_dc_modes;
210};
211
212/**
213 * enum drm_link_status - connector's link_status property value
214 *
215 * This enum is used as the connector's link status property value.
216 * It is set to the values defined in uapi.
217 *
218 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful
219 * link training
220 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training
221 * failure
222 */
223enum drm_link_status {
224 DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD,
225 DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD,
226};
227
228/**
229 * enum drm_panel_orientation - panel_orientation info for &drm_display_info
230 *
231 * This enum is used to track the (LCD) panel orientation. There are no
232 * separate #defines for the uapi!
233 *
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
238 * attached.
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.
248 */
249enum 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,
255};
256
257/**
258 * struct drm_monitor_range_info - Panel's Monitor range in EDID for
259 * &drm_display_info
260 *
261 * This struct is used to store a frequency range supported by panel
262 * as parsed from EDID's detailed monitor range descriptor block.
263 *
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
268 */
269struct drm_monitor_range_info {
270 u8 min_vfreq;
271 u8 max_vfreq;
272};
273
274/*
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
280 * userspace.
281 */
282
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
305
306/**
307 * enum drm_bus_flags - bus_flags info for &drm_display_info
308 *
309 * This enum defines signal polarities and clock edge information for signals on
310 * a bus as bitmask flags.
311 *
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
322 * and sample edges.
323 */
324enum drm_bus_flags {
325 /**
326 * @DRM_BUS_FLAG_DE_LOW:
327 *
328 * The Data Enable signal is active low
329 */
330 DRM_BUS_FLAG_DE_LOW = BIT(0),
331
332 /**
333 * @DRM_BUS_FLAG_DE_HIGH:
334 *
335 * The Data Enable signal is active high
336 */
337 DRM_BUS_FLAG_DE_HIGH = BIT(1),
338
339 /**
340 * @DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE:
341 *
342 * Data is driven on the rising edge of the pixel clock
343 */
344 DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE = BIT(2),
345
346 /**
347 * @DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE:
348 *
349 * Data is driven on the falling edge of the pixel clock
350 */
351 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE = BIT(3),
352
353 /**
354 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE:
355 *
356 * Data is sampled on the rising edge of the pixel clock
357 */
358 DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
359
360 /**
361 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE:
362 *
363 * Data is sampled on the falling edge of the pixel clock
364 */
365 DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
366
367 /**
368 * @DRM_BUS_FLAG_DATA_MSB_TO_LSB:
369 *
370 * Data is transmitted MSB to LSB on the bus
371 */
372 DRM_BUS_FLAG_DATA_MSB_TO_LSB = BIT(4),
373
374 /**
375 * @DRM_BUS_FLAG_DATA_LSB_TO_MSB:
376 *
377 * Data is transmitted LSB to MSB on the bus
378 */
379 DRM_BUS_FLAG_DATA_LSB_TO_MSB = BIT(5),
380
381 /**
382 * @DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE:
383 *
384 * Sync signals are driven on the rising edge of the pixel clock
385 */
386 DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE = BIT(6),
387
388 /**
389 * @DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE:
390 *
391 * Sync signals are driven on the falling edge of the pixel clock
392 */
393 DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE = BIT(7),
394
395 /**
396 * @DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE:
397 *
398 * Sync signals are sampled on the rising edge of the pixel clock
399 */
400 DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE = DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE,
401
402 /**
403 * @DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE:
404 *
405 * Sync signals are sampled on the falling edge of the pixel clock
406 */
407 DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE = DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE,
408
409 /**
410 * @DRM_BUS_FLAG_SHARP_SIGNALS:
411 *
412 * Set if the Sharp-specific signals (SPL, CLS, PS, REV) must be used
413 */
414 DRM_BUS_FLAG_SHARP_SIGNALS = BIT(8),
415};
416
417/**
418 * struct drm_display_info - runtime data about the connected sink
419 *
420 * Describes a given display (e.g. CRT or flat panel) and its limitations. For
421 * fixed display sinks like built-in panels there's not much difference between
422 * this and &struct drm_connector. But for sinks with a real cable this
423 * structure is meant to describe all the things at the other end of the cable.
424 *
425 * For sinks which provide an EDID this can be filled out by calling
426 * drm_add_edid_modes().
427 */
428struct drm_display_info {
429 /**
430 * @width_mm: Physical width in mm.
431 */
432 unsigned int width_mm;
433
434 /**
435 * @height_mm: Physical height in mm.
436 */
437 unsigned int height_mm;
438
439 /**
440 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
441 */
442 unsigned int bpc;
443
444 /**
445 * @subpixel_order: Subpixel order of LCD panels.
446 */
447 enum subpixel_order subpixel_order;
448
449#define DRM_COLOR_FORMAT_RGB444 (1<<0)
450#define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
451#define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
452#define DRM_COLOR_FORMAT_YCRCB420 (1<<3)
453
454 /**
455 * @panel_orientation: Read only connector property for built-in panels,
456 * indicating the orientation of the panel vs the device's casing.
457 * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN.
458 * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the
459 * fb to compensate and gets exported as prop to userspace.
460 */
461 int panel_orientation;
462
463 /**
464 * @color_formats: HDMI Color formats, selects between RGB and YCrCb
465 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
466 * as used to describe the pixel format in framebuffers, and also don't
467 * match the formats in @bus_formats which are shared with v4l.
468 */
469 u32 color_formats;
470
471 /**
472 * @bus_formats: Pixel data format on the wire, somewhat redundant with
473 * @color_formats. Array of size @num_bus_formats encoded using
474 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
475 */
476 const u32 *bus_formats;
477 /**
478 * @num_bus_formats: Size of @bus_formats array.
479 */
480 unsigned int num_bus_formats;
481
482 /**
483 * @bus_flags: Additional information (like pixel signal polarity) for
484 * the pixel data on the bus, using &enum drm_bus_flags values
485 * DRM_BUS_FLAGS\_.
486 */
487 u32 bus_flags;
488
489 /**
490 * @max_tmds_clock: Maximum TMDS clock rate supported by the
491 * sink in kHz. 0 means undefined.
492 */
493 int max_tmds_clock;
494
495 /**
496 * @dvi_dual: Dual-link DVI sink?
497 */
498 bool dvi_dual;
499
500 /**
501 * @is_hdmi: True if the sink is an HDMI device.
502 *
503 * This field shall be used instead of calling
504 * drm_detect_hdmi_monitor() when possible.
505 */
506 bool is_hdmi;
507
508 /**
509 * @has_hdmi_infoframe: Does the sink support the HDMI infoframe?
510 */
511 bool has_hdmi_infoframe;
512
513 /**
514 * @rgb_quant_range_selectable: Does the sink support selecting
515 * the RGB quantization range?
516 */
517 bool rgb_quant_range_selectable;
518
519 /**
520 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
521 * more stuff redundant with @bus_formats.
522 */
523 u8 edid_hdmi_dc_modes;
524
525 /**
526 * @cea_rev: CEA revision of the HDMI sink.
527 */
528 u8 cea_rev;
529
530 /**
531 * @hdmi: advance features of a HDMI sink.
532 */
533 struct drm_hdmi_info hdmi;
534
535 /**
536 * @non_desktop: Non desktop display (HMD).
537 */
538 bool non_desktop;
539
540 /**
541 * @monitor_range: Frequency range supported by monitor range descriptor
542 */
543 struct drm_monitor_range_info monitor_range;
544};
545
546int drm_display_info_set_bus_formats(struct drm_display_info *info,
547 const u32 *formats,
548 unsigned int num_formats);
549
550/**
551 * struct drm_connector_tv_margins - TV connector related margins
552 *
553 * Describes the margins in pixels to put around the image on TV
554 * connectors to deal with overscan.
555 */
556struct drm_connector_tv_margins {
557 /**
558 * @bottom: Bottom margin in pixels.
559 */
560 unsigned int bottom;
561
562 /**
563 * @left: Left margin in pixels.
564 */
565 unsigned int left;
566
567 /**
568 * @right: Right margin in pixels.
569 */
570 unsigned int right;
571
572 /**
573 * @top: Top margin in pixels.
574 */
575 unsigned int top;
576};
577
578/**
579 * struct drm_tv_connector_state - TV connector related states
580 * @subconnector: selected subconnector
581 * @margins: TV margins
582 * @mode: TV mode
583 * @brightness: brightness in percent
584 * @contrast: contrast in percent
585 * @flicker_reduction: flicker reduction in percent
586 * @overscan: overscan in percent
587 * @saturation: saturation in percent
588 * @hue: hue in percent
589 */
590struct drm_tv_connector_state {
591 enum drm_mode_subconnector subconnector;
592 struct drm_connector_tv_margins margins;
593 unsigned int mode;
594 unsigned int brightness;
595 unsigned int contrast;
596 unsigned int flicker_reduction;
597 unsigned int overscan;
598 unsigned int saturation;
599 unsigned int hue;
600};
601
602/**
603 * struct drm_connector_state - mutable connector state
604 */
605struct drm_connector_state {
606 /** @connector: backpointer to the connector */
607 struct drm_connector *connector;
608
609 /**
610 * @crtc: CRTC to connect connector to, NULL if disabled.
611 *
612 * Do not change this directly, use drm_atomic_set_crtc_for_connector()
613 * instead.
614 */
615 struct drm_crtc *crtc;
616
617 /**
618 * @best_encoder:
619 *
620 * Used by the atomic helpers to select the encoder, through the
621 * &drm_connector_helper_funcs.atomic_best_encoder or
622 * &drm_connector_helper_funcs.best_encoder callbacks.
623 *
624 * This is also used in the atomic helpers to map encoders to their
625 * current and previous connectors, see
626 * drm_atomic_get_old_connector_for_encoder() and
627 * drm_atomic_get_new_connector_for_encoder().
628 *
629 * NOTE: Atomic drivers must fill this out (either themselves or through
630 * helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will
631 * not return correct data to userspace.
632 */
633 struct drm_encoder *best_encoder;
634
635 /**
636 * @link_status: Connector link_status to keep track of whether link is
637 * GOOD or BAD to notify userspace if retraining is necessary.
638 */
639 enum drm_link_status link_status;
640
641 /** @state: backpointer to global drm_atomic_state */
642 struct drm_atomic_state *state;
643
644 /**
645 * @commit: Tracks the pending commit to prevent use-after-free conditions.
646 *
647 * Is only set when @crtc is NULL.
648 */
649 struct drm_crtc_commit *commit;
650
651 /** @tv: TV connector state */
652 struct drm_tv_connector_state tv;
653
654 /**
655 * @self_refresh_aware:
656 *
657 * This tracks whether a connector is aware of the self refresh state.
658 * It should be set to true for those connector implementations which
659 * understand the self refresh state. This is needed since the crtc
660 * registers the self refresh helpers and it doesn't know if the
661 * connectors downstream have implemented self refresh entry/exit.
662 *
663 * Drivers should set this to true in atomic_check if they know how to
664 * handle self_refresh requests.
665 */
666 bool self_refresh_aware;
667
668 /**
669 * @picture_aspect_ratio: Connector property to control the
670 * HDMI infoframe aspect ratio setting.
671 *
672 * The %DRM_MODE_PICTURE_ASPECT_\* values much match the
673 * values for &enum hdmi_picture_aspect
674 */
675 enum hdmi_picture_aspect picture_aspect_ratio;
676
677 /**
678 * @content_type: Connector property to control the
679 * HDMI infoframe content type setting.
680 * The %DRM_MODE_CONTENT_TYPE_\* values much
681 * match the values.
682 */
683 unsigned int content_type;
684
685 /**
686 * @hdcp_content_type: Connector property to pass the type of
687 * protected content. This is most commonly used for HDCP.
688 */
689 unsigned int hdcp_content_type;
690
691 /**
692 * @scaling_mode: Connector property to control the
693 * upscaling, mostly used for built-in panels.
694 */
695 unsigned int scaling_mode;
696
697 /**
698 * @content_protection: Connector property to request content
699 * protection. This is most commonly used for HDCP.
700 */
701 unsigned int content_protection;
702
703 /**
704 * @colorspace: State variable for Connector property to request
705 * colorspace change on Sink. This is most commonly used to switch
706 * to wider color gamuts like BT2020.
707 */
708 u32 colorspace;
709
710 /**
711 * @writeback_job: Writeback job for writeback connectors
712 *
713 * Holds the framebuffer and out-fence for a writeback connector. As
714 * the writeback completion may be asynchronous to the normal commit
715 * cycle, the writeback job lifetime is managed separately from the
716 * normal atomic state by this object.
717 *
718 * See also: drm_writeback_queue_job() and
719 * drm_writeback_signal_completion()
720 */
721 struct drm_writeback_job *writeback_job;
722
723 /**
724 * @max_requested_bpc: Connector property to limit the maximum bit
725 * depth of the pixels.
726 */
727 u8 max_requested_bpc;
728
729 /**
730 * @max_bpc: Connector max_bpc based on the requested max_bpc property
731 * and the connector bpc limitations obtained from edid.
732 */
733 u8 max_bpc;
734
735 /**
736 * @hdr_output_metadata:
737 * DRM blob property for HDR output metadata
738 */
739 struct drm_property_blob *hdr_output_metadata;
740};
741
742/**
743 * struct drm_connector_funcs - control connectors on a given device
744 *
745 * Each CRTC may have one or more connectors attached to it. The functions
746 * below allow the core DRM code to control connectors, enumerate available modes,
747 * etc.
748 */
749struct drm_connector_funcs {
750 /**
751 * @dpms:
752 *
753 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
754 * is exposed as a standard property on the connector, but diverted to
755 * this callback in the drm core. Note that atomic drivers don't
756 * implement the 4 level DPMS support on the connector any more, but
757 * instead only have an on/off "ACTIVE" property on the CRTC object.
758 *
759 * This hook is not used by atomic drivers, remapping of the legacy DPMS
760 * property is entirely handled in the DRM core.
761 *
762 * RETURNS:
763 *
764 * 0 on success or a negative error code on failure.
765 */
766 int (*dpms)(struct drm_connector *connector, int mode);
767
768 /**
769 * @reset:
770 *
771 * Reset connector hardware and software state to off. This function isn't
772 * called by the core directly, only through drm_mode_config_reset().
773 * It's not a helper hook only for historical reasons.
774 *
775 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
776 * atomic state using this hook.
777 */
778 void (*reset)(struct drm_connector *connector);
779
780 /**
781 * @detect:
782 *
783 * Check to see if anything is attached to the connector. The parameter
784 * force is set to false whilst polling, true when checking the
785 * connector due to a user request. force can be used by the driver to
786 * avoid expensive, destructive operations during automated probing.
787 *
788 * This callback is optional, if not implemented the connector will be
789 * considered as always being attached.
790 *
791 * FIXME:
792 *
793 * Note that this hook is only called by the probe helper. It's not in
794 * the helper library vtable purely for historical reasons. The only DRM
795 * core entry point to probe connector state is @fill_modes.
796 *
797 * Note that the helper library will already hold
798 * &drm_mode_config.connection_mutex. Drivers which need to grab additional
799 * locks to avoid races with concurrent modeset changes need to use
800 * &drm_connector_helper_funcs.detect_ctx instead.
801 *
802 * RETURNS:
803 *
804 * drm_connector_status indicating the connector's status.
805 */
806 enum drm_connector_status (*detect)(struct drm_connector *connector,
807 bool force);
808
809 /**
810 * @force:
811 *
812 * This function is called to update internal encoder state when the
813 * connector is forced to a certain state by userspace, either through
814 * the sysfs interfaces or on the kernel cmdline. In that case the
815 * @detect callback isn't called.
816 *
817 * FIXME:
818 *
819 * Note that this hook is only called by the probe helper. It's not in
820 * the helper library vtable purely for historical reasons. The only DRM
821 * core entry point to probe connector state is @fill_modes.
822 */
823 void (*force)(struct drm_connector *connector);
824
825 /**
826 * @fill_modes:
827 *
828 * Entry point for output detection and basic mode validation. The
829 * driver should reprobe the output if needed (e.g. when hotplug
830 * handling is unreliable), add all detected modes to &drm_connector.modes
831 * and filter out any the device can't support in any configuration. It
832 * also needs to filter out any modes wider or higher than the
833 * parameters max_width and max_height indicate.
834 *
835 * The drivers must also prune any modes no longer valid from
836 * &drm_connector.modes. Furthermore it must update
837 * &drm_connector.status and &drm_connector.edid. If no EDID has been
838 * received for this output connector->edid must be NULL.
839 *
840 * Drivers using the probe helpers should use
841 * drm_helper_probe_single_connector_modes() to implement this
842 * function.
843 *
844 * RETURNS:
845 *
846 * The number of modes detected and filled into &drm_connector.modes.
847 */
848 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
849
850 /**
851 * @set_property:
852 *
853 * This is the legacy entry point to update a property attached to the
854 * connector.
855 *
856 * This callback is optional if the driver does not support any legacy
857 * driver-private properties. For atomic drivers it is not used because
858 * property handling is done entirely in the DRM core.
859 *
860 * RETURNS:
861 *
862 * 0 on success or a negative error code on failure.
863 */
864 int (*set_property)(struct drm_connector *connector, struct drm_property *property,
865 uint64_t val);
866
867 /**
868 * @late_register:
869 *
870 * This optional hook can be used to register additional userspace
871 * interfaces attached to the connector, light backlight control, i2c,
872 * DP aux or similar interfaces. It is called late in the driver load
873 * sequence from drm_connector_register() when registering all the
874 * core drm connector interfaces. Everything added from this callback
875 * should be unregistered in the early_unregister callback.
876 *
877 * This is called while holding &drm_connector.mutex.
878 *
879 * Returns:
880 *
881 * 0 on success, or a negative error code on failure.
882 */
883 int (*late_register)(struct drm_connector *connector);
884
885 /**
886 * @early_unregister:
887 *
888 * This optional hook should be used to unregister the additional
889 * userspace interfaces attached to the connector from
890 * late_register(). It is called from drm_connector_unregister(),
891 * early in the driver unload sequence to disable userspace access
892 * before data structures are torndown.
893 *
894 * This is called while holding &drm_connector.mutex.
895 */
896 void (*early_unregister)(struct drm_connector *connector);
897
898 /**
899 * @destroy:
900 *
901 * Clean up connector resources. This is called at driver unload time
902 * through drm_mode_config_cleanup(). It can also be called at runtime
903 * when a connector is being hot-unplugged for drivers that support
904 * connector hotplugging (e.g. DisplayPort MST).
905 */
906 void (*destroy)(struct drm_connector *connector);
907
908 /**
909 * @atomic_duplicate_state:
910 *
911 * Duplicate the current atomic state for this connector and return it.
912 * The core and helpers guarantee that any atomic state duplicated with
913 * this hook and still owned by the caller (i.e. not transferred to the
914 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
915 * cleaned up by calling the @atomic_destroy_state hook in this
916 * structure.
917 *
918 * This callback is mandatory for atomic drivers.
919 *
920 * Atomic drivers which don't subclass &struct drm_connector_state should use
921 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
922 * state structure to extend it with driver-private state should use
923 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
924 * duplicated in a consistent fashion across drivers.
925 *
926 * It is an error to call this hook before &drm_connector.state has been
927 * initialized correctly.
928 *
929 * NOTE:
930 *
931 * If the duplicate state references refcounted resources this hook must
932 * acquire a reference for each of them. The driver must release these
933 * references again in @atomic_destroy_state.
934 *
935 * RETURNS:
936 *
937 * Duplicated atomic state or NULL when the allocation failed.
938 */
939 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
940
941 /**
942 * @atomic_destroy_state:
943 *
944 * Destroy a state duplicated with @atomic_duplicate_state and release
945 * or unreference all resources it references
946 *
947 * This callback is mandatory for atomic drivers.
948 */
949 void (*atomic_destroy_state)(struct drm_connector *connector,
950 struct drm_connector_state *state);
951
952 /**
953 * @atomic_set_property:
954 *
955 * Decode a driver-private property value and store the decoded value
956 * into the passed-in state structure. Since the atomic core decodes all
957 * standardized properties (even for extensions beyond the core set of
958 * properties which might not be implemented by all drivers) this
959 * requires drivers to subclass the state structure.
960 *
961 * Such driver-private properties should really only be implemented for
962 * truly hardware/vendor specific state. Instead it is preferred to
963 * standardize atomic extension and decode the properties used to expose
964 * such an extension in the core.
965 *
966 * Do not call this function directly, use
967 * drm_atomic_connector_set_property() instead.
968 *
969 * This callback is optional if the driver does not support any
970 * driver-private atomic properties.
971 *
972 * NOTE:
973 *
974 * This function is called in the state assembly phase of atomic
975 * modesets, which can be aborted for any reason (including on
976 * userspace's request to just check whether a configuration would be
977 * possible). Drivers MUST NOT touch any persistent state (hardware or
978 * software) or data structures except the passed in @state parameter.
979 *
980 * Also since userspace controls in which order properties are set this
981 * function must not do any input validation (since the state update is
982 * incomplete and hence likely inconsistent). Instead any such input
983 * validation must be done in the various atomic_check callbacks.
984 *
985 * RETURNS:
986 *
987 * 0 if the property has been found, -EINVAL if the property isn't
988 * implemented by the driver (which shouldn't ever happen, the core only
989 * asks for properties attached to this connector). No other validation
990 * is allowed by the driver. The core already checks that the property
991 * value is within the range (integer, valid enum value, ...) the driver
992 * set when registering the property.
993 */
994 int (*atomic_set_property)(struct drm_connector *connector,
995 struct drm_connector_state *state,
996 struct drm_property *property,
997 uint64_t val);
998
999 /**
1000 * @atomic_get_property:
1001 *
1002 * Reads out the decoded driver-private property. This is used to
1003 * implement the GETCONNECTOR IOCTL.
1004 *
1005 * Do not call this function directly, use
1006 * drm_atomic_connector_get_property() instead.
1007 *
1008 * This callback is optional if the driver does not support any
1009 * driver-private atomic properties.
1010 *
1011 * RETURNS:
1012 *
1013 * 0 on success, -EINVAL if the property isn't implemented by the
1014 * driver (which shouldn't ever happen, the core only asks for
1015 * properties attached to this connector).
1016 */
1017 int (*atomic_get_property)(struct drm_connector *connector,
1018 const struct drm_connector_state *state,
1019 struct drm_property *property,
1020 uint64_t *val);
1021
1022 /**
1023 * @atomic_print_state:
1024 *
1025 * If driver subclasses &struct drm_connector_state, it should implement
1026 * this optional hook for printing additional driver specific state.
1027 *
1028 * Do not call this directly, use drm_atomic_connector_print_state()
1029 * instead.
1030 */
1031 void (*atomic_print_state)(struct drm_printer *p,
1032 const struct drm_connector_state *state);
1033};
1034
1035/**
1036 * struct drm_cmdline_mode - DRM Mode passed through the kernel command-line
1037 *
1038 * Each connector can have an initial mode with additional options
1039 * passed through the kernel command line. This structure allows to
1040 * express those parameters and will be filled by the command-line
1041 * parser.
1042 */
1043struct drm_cmdline_mode {
1044 /**
1045 * @name:
1046 *
1047 * Name of the mode.
1048 */
1049 char name[DRM_DISPLAY_MODE_LEN];
1050
1051 /**
1052 * @specified:
1053 *
1054 * Has a mode been read from the command-line?
1055 */
1056 bool specified;
1057
1058 /**
1059 * @refresh_specified:
1060 *
1061 * Did the mode have a preferred refresh rate?
1062 */
1063 bool refresh_specified;
1064
1065 /**
1066 * @bpp_specified:
1067 *
1068 * Did the mode have a preferred BPP?
1069 */
1070 bool bpp_specified;
1071
1072 /**
1073 * @xres:
1074 *
1075 * Active resolution on the X axis, in pixels.
1076 */
1077 int xres;
1078
1079 /**
1080 * @yres:
1081 *
1082 * Active resolution on the Y axis, in pixels.
1083 */
1084 int yres;
1085
1086 /**
1087 * @bpp:
1088 *
1089 * Bits per pixels for the mode.
1090 */
1091 int bpp;
1092
1093 /**
1094 * @refresh:
1095 *
1096 * Refresh rate, in Hertz.
1097 */
1098 int refresh;
1099
1100 /**
1101 * @rb:
1102 *
1103 * Do we need to use reduced blanking?
1104 */
1105 bool rb;
1106
1107 /**
1108 * @interlace:
1109 *
1110 * The mode is interlaced.
1111 */
1112 bool interlace;
1113
1114 /**
1115 * @cvt:
1116 *
1117 * The timings will be calculated using the VESA Coordinated
1118 * Video Timings instead of looking up the mode from a table.
1119 */
1120 bool cvt;
1121
1122 /**
1123 * @margins:
1124 *
1125 * Add margins to the mode calculation (1.8% of xres rounded
1126 * down to 8 pixels and 1.8% of yres).
1127 */
1128 bool margins;
1129
1130 /**
1131 * @force:
1132 *
1133 * Ignore the hotplug state of the connector, and force its
1134 * state to one of the DRM_FORCE_* values.
1135 */
1136 enum drm_connector_force force;
1137
1138 /**
1139 * @rotation_reflection:
1140 *
1141 * Initial rotation and reflection of the mode setup from the
1142 * command line. See DRM_MODE_ROTATE_* and
1143 * DRM_MODE_REFLECT_*. The only rotations supported are
1144 * DRM_MODE_ROTATE_0 and DRM_MODE_ROTATE_180.
1145 */
1146 unsigned int rotation_reflection;
1147
1148 /**
1149 * @panel_orientation:
1150 *
1151 * drm-connector "panel orientation" property override value,
1152 * DRM_MODE_PANEL_ORIENTATION_UNKNOWN if not set.
1153 */
1154 enum drm_panel_orientation panel_orientation;
1155
1156 /**
1157 * @tv_margins: TV margins to apply to the mode.
1158 */
1159 struct drm_connector_tv_margins tv_margins;
1160};
1161
1162/**
1163 * struct drm_connector - central DRM connector control structure
1164 *
1165 * Each connector may be connected to one or more CRTCs, or may be clonable by
1166 * another connector if they can share a CRTC. Each connector also has a specific
1167 * position in the broader display (referred to as a 'screen' though it could
1168 * span multiple monitors).
1169 */
1170struct drm_connector {
1171 /** @dev: parent DRM device */
1172 struct drm_device *dev;
1173 /** @kdev: kernel device for sysfs attributes */
1174 struct device *kdev;
1175 /** @attr: sysfs attributes */
1176 struct device_attribute *attr;
1177
1178 /**
1179 * @head:
1180 *
1181 * List of all connectors on a @dev, linked from
1182 * &drm_mode_config.connector_list. Protected by
1183 * &drm_mode_config.connector_list_lock, but please only use
1184 * &drm_connector_list_iter to walk this list.
1185 */
1186 struct list_head head;
1187
1188 /** @base: base KMS object */
1189 struct drm_mode_object base;
1190
1191 /** @name: human readable name, can be overwritten by the driver */
1192 char *name;
1193
1194 /**
1195 * @mutex: Lock for general connector state, but currently only protects
1196 * @registered. Most of the connector state is still protected by
1197 * &drm_mode_config.mutex.
1198 */
1199 struct mutex mutex;
1200
1201 /**
1202 * @index: Compacted connector index, which matches the position inside
1203 * the mode_config.list for drivers not supporting hot-add/removing. Can
1204 * be used as an array index. It is invariant over the lifetime of the
1205 * connector.
1206 */
1207 unsigned index;
1208
1209 /**
1210 * @connector_type:
1211 * one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
1212 */
1213 int connector_type;
1214 /** @connector_type_id: index into connector type enum */
1215 int connector_type_id;
1216 /**
1217 * @interlace_allowed:
1218 * Can this connector handle interlaced modes? Only used by
1219 * drm_helper_probe_single_connector_modes() for mode filtering.
1220 */
1221 bool interlace_allowed;
1222 /**
1223 * @doublescan_allowed:
1224 * Can this connector handle doublescan? Only used by
1225 * drm_helper_probe_single_connector_modes() for mode filtering.
1226 */
1227 bool doublescan_allowed;
1228 /**
1229 * @stereo_allowed:
1230 * Can this connector handle stereo modes? Only used by
1231 * drm_helper_probe_single_connector_modes() for mode filtering.
1232 */
1233 bool stereo_allowed;
1234
1235 /**
1236 * @ycbcr_420_allowed : This bool indicates if this connector is
1237 * capable of handling YCBCR 420 output. While parsing the EDID
1238 * blocks it's very helpful to know if the source is capable of
1239 * handling YCBCR 420 outputs.
1240 */
1241 bool ycbcr_420_allowed;
1242
1243 /**
1244 * @registration_state: Is this connector initializing, exposed
1245 * (registered) with userspace, or unregistered?
1246 *
1247 * Protected by @mutex.
1248 */
1249 enum drm_connector_registration_state registration_state;
1250
1251 /**
1252 * @modes:
1253 * Modes available on this connector (from fill_modes() + user).
1254 * Protected by &drm_mode_config.mutex.
1255 */
1256 struct list_head modes;
1257
1258 /**
1259 * @status:
1260 * One of the drm_connector_status enums (connected, not, or unknown).
1261 * Protected by &drm_mode_config.mutex.
1262 */
1263 enum drm_connector_status status;
1264
1265 /**
1266 * @probed_modes:
1267 * These are modes added by probing with DDC or the BIOS, before
1268 * filtering is applied. Used by the probe helpers. Protected by
1269 * &drm_mode_config.mutex.
1270 */
1271 struct list_head probed_modes;
1272
1273 /**
1274 * @display_info: Display information is filled from EDID information
1275 * when a display is detected. For non hot-pluggable displays such as
1276 * flat panels in embedded systems, the driver should initialize the
1277 * &drm_display_info.width_mm and &drm_display_info.height_mm fields
1278 * with the physical size of the display.
1279 *
1280 * Protected by &drm_mode_config.mutex.
1281 */
1282 struct drm_display_info display_info;
1283
1284 /** @funcs: connector control functions */
1285 const struct drm_connector_funcs *funcs;
1286
1287 /**
1288 * @edid_blob_ptr: DRM property containing EDID if present. Protected by
1289 * &drm_mode_config.mutex. This should be updated only by calling
1290 * drm_connector_update_edid_property().
1291 */
1292 struct drm_property_blob *edid_blob_ptr;
1293
1294 /** @properties: property tracking for this connector */
1295 struct drm_object_properties properties;
1296
1297 /**
1298 * @scaling_mode_property: Optional atomic property to control the
1299 * upscaling. See drm_connector_attach_content_protection_property().
1300 */
1301 struct drm_property *scaling_mode_property;
1302
1303 /**
1304 * @vrr_capable_property: Optional property to help userspace
1305 * query hardware support for variable refresh rate on a connector.
1306 * connector. Drivers can add the property to a connector by
1307 * calling drm_connector_attach_vrr_capable_property().
1308 *
1309 * This should be updated only by calling
1310 * drm_connector_set_vrr_capable_property().
1311 */
1312 struct drm_property *vrr_capable_property;
1313
1314 /**
1315 * @colorspace_property: Connector property to set the suitable
1316 * colorspace supported by the sink.
1317 */
1318 struct drm_property *colorspace_property;
1319
1320 /**
1321 * @path_blob_ptr:
1322 *
1323 * DRM blob property data for the DP MST path property. This should only
1324 * be updated by calling drm_connector_set_path_property().
1325 */
1326 struct drm_property_blob *path_blob_ptr;
1327
1328 /**
1329 * @max_bpc_property: Default connector property for the max bpc to be
1330 * driven out of the connector.
1331 */
1332 struct drm_property *max_bpc_property;
1333
1334#define DRM_CONNECTOR_POLL_HPD (1 << 0)
1335#define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
1336#define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
1337
1338 /**
1339 * @polled:
1340 *
1341 * Connector polling mode, a combination of
1342 *
1343 * DRM_CONNECTOR_POLL_HPD
1344 * The connector generates hotplug events and doesn't need to be
1345 * periodically polled. The CONNECT and DISCONNECT flags must not
1346 * be set together with the HPD flag.
1347 *
1348 * DRM_CONNECTOR_POLL_CONNECT
1349 * Periodically poll the connector for connection.
1350 *
1351 * DRM_CONNECTOR_POLL_DISCONNECT
1352 * Periodically poll the connector for disconnection, without
1353 * causing flickering even when the connector is in use. DACs should
1354 * rarely do this without a lot of testing.
1355 *
1356 * Set to 0 for connectors that don't support connection status
1357 * discovery.
1358 */
1359 uint8_t polled;
1360
1361 /**
1362 * @dpms: Current dpms state. For legacy drivers the
1363 * &drm_connector_funcs.dpms callback must update this. For atomic
1364 * drivers, this is handled by the core atomic code, and drivers must
1365 * only take &drm_crtc_state.active into account.
1366 */
1367 int dpms;
1368
1369 /** @helper_private: mid-layer private data */
1370 const struct drm_connector_helper_funcs *helper_private;
1371
1372 /** @cmdline_mode: mode line parsed from the kernel cmdline for this connector */
1373 struct drm_cmdline_mode cmdline_mode;
1374 /** @force: a DRM_FORCE_<foo> state for forced mode sets */
1375 enum drm_connector_force force;
1376 /** @override_edid: has the EDID been overwritten through debugfs for testing? */
1377 bool override_edid;
1378 /** @epoch_counter: used to detect any other changes in connector, besides status */
1379 u64 epoch_counter;
1380
1381 /**
1382 * @possible_encoders: Bit mask of encoders that can drive this
1383 * connector, drm_encoder_index() determines the index into the bitfield
1384 * and the bits are set with drm_connector_attach_encoder().
1385 */
1386 u32 possible_encoders;
1387
1388 /**
1389 * @encoder: Currently bound encoder driving this connector, if any.
1390 * Only really meaningful for non-atomic drivers. Atomic drivers should
1391 * instead look at &drm_connector_state.best_encoder, and in case they
1392 * need the CRTC driving this output, &drm_connector_state.crtc.
1393 */
1394 struct drm_encoder *encoder;
1395
1396#define MAX_ELD_BYTES 128
1397 /** @eld: EDID-like data, if present */
1398 uint8_t eld[MAX_ELD_BYTES];
1399 /** @latency_present: AV delay info from ELD, if found */
1400 bool latency_present[2];
1401 /**
1402 * @video_latency: Video latency info from ELD, if found.
1403 * [0]: progressive, [1]: interlaced
1404 */
1405 int video_latency[2];
1406 /**
1407 * @audio_latency: audio latency info from ELD, if found
1408 * [0]: progressive, [1]: interlaced
1409 */
1410 int audio_latency[2];
1411
1412 /**
1413 * @ddc: associated ddc adapter.
1414 * A connector usually has its associated ddc adapter. If a driver uses
1415 * this field, then an appropriate symbolic link is created in connector
1416 * sysfs directory to make it easy for the user to tell which i2c
1417 * adapter is for a particular display.
1418 *
1419 * The field should be set by calling drm_connector_init_with_ddc().
1420 */
1421 struct i2c_adapter *ddc;
1422
1423 /**
1424 * @null_edid_counter: track sinks that give us all zeros for the EDID.
1425 * Needed to workaround some HW bugs where we get all 0s
1426 */
1427 int null_edid_counter;
1428
1429 /** @bad_edid_counter: track sinks that give us an EDID with invalid checksum */
1430 unsigned bad_edid_counter;
1431
1432 /**
1433 * @edid_corrupt: Indicates whether the last read EDID was corrupt. Used
1434 * in Displayport compliance testing - Displayport Link CTS Core 1.2
1435 * rev1.1 4.2.2.6
1436 */
1437 bool edid_corrupt;
1438 /**
1439 * @real_edid_checksum: real edid checksum for corrupted edid block.
1440 * Required in Displayport 1.4 compliance testing
1441 * rev1.1 4.2.2.6
1442 */
1443 u8 real_edid_checksum;
1444
1445 /** @debugfs_entry: debugfs directory for this connector */
1446 struct dentry *debugfs_entry;
1447
1448 /**
1449 * @state:
1450 *
1451 * Current atomic state for this connector.
1452 *
1453 * This is protected by &drm_mode_config.connection_mutex. Note that
1454 * nonblocking atomic commits access the current connector state without
1455 * taking locks. Either by going through the &struct drm_atomic_state
1456 * pointers, see for_each_oldnew_connector_in_state(),
1457 * for_each_old_connector_in_state() and
1458 * for_each_new_connector_in_state(). Or through careful ordering of
1459 * atomic commit operations as implemented in the atomic helpers, see
1460 * &struct drm_crtc_commit.
1461 */
1462 struct drm_connector_state *state;
1463
1464 /* DisplayID bits. FIXME: Extract into a substruct? */
1465
1466 /**
1467 * @tile_blob_ptr:
1468 *
1469 * DRM blob property data for the tile property (used mostly by DP MST).
1470 * This is meant for screens which are driven through separate display
1471 * pipelines represented by &drm_crtc, which might not be running with
1472 * genlocked clocks. For tiled panels which are genlocked, like
1473 * dual-link LVDS or dual-link DSI, the driver should try to not expose
1474 * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
1475 *
1476 * This should only be updated by calling
1477 * drm_connector_set_tile_property().
1478 */
1479 struct drm_property_blob *tile_blob_ptr;
1480
1481 /** @has_tile: is this connector connected to a tiled monitor */
1482 bool has_tile;
1483 /** @tile_group: tile group for the connected monitor */
1484 struct drm_tile_group *tile_group;
1485 /** @tile_is_single_monitor: whether the tile is one monitor housing */
1486 bool tile_is_single_monitor;
1487
1488 /** @num_h_tile: number of horizontal tiles in the tile group */
1489 /** @num_v_tile: number of vertical tiles in the tile group */
1490 uint8_t num_h_tile, num_v_tile;
1491 /** @tile_h_loc: horizontal location of this tile */
1492 /** @tile_v_loc: vertical location of this tile */
1493 uint8_t tile_h_loc, tile_v_loc;
1494 /** @tile_h_size: horizontal size of this tile. */
1495 /** @tile_v_size: vertical size of this tile. */
1496 uint16_t tile_h_size, tile_v_size;
1497
1498 /**
1499 * @free_node:
1500 *
1501 * List used only by &drm_connector_list_iter to be able to clean up a
1502 * connector from any context, in conjunction with
1503 * &drm_mode_config.connector_free_work.
1504 */
1505 struct llist_node free_node;
1506
1507 /** @hdr_sink_metadata: HDR Metadata Information read from sink */
1508 struct hdr_sink_metadata hdr_sink_metadata;
1509};
1510
1511#define obj_to_connector(x) container_of(x, struct drm_connector, base)
1512
1513int drm_connector_init(struct drm_device *dev,
1514 struct drm_connector *connector,
1515 const struct drm_connector_funcs *funcs,
1516 int connector_type);
1517int drm_connector_init_with_ddc(struct drm_device *dev,
1518 struct drm_connector *connector,
1519 const struct drm_connector_funcs *funcs,
1520 int connector_type,
1521 struct i2c_adapter *ddc);
1522void drm_connector_attach_edid_property(struct drm_connector *connector);
1523int drm_connector_register(struct drm_connector *connector);
1524void drm_connector_unregister(struct drm_connector *connector);
1525int drm_connector_attach_encoder(struct drm_connector *connector,
1526 struct drm_encoder *encoder);
1527
1528void drm_connector_cleanup(struct drm_connector *connector);
1529
1530static inline unsigned int drm_connector_index(const struct drm_connector *connector)
1531{
1532 return connector->index;
1533}
1534
1535static inline u32 drm_connector_mask(const struct drm_connector *connector)
1536{
1537 return 1 << connector->index;
1538}
1539
1540/**
1541 * drm_connector_lookup - lookup connector object
1542 * @dev: DRM device
1543 * @file_priv: drm file to check for lease against.
1544 * @id: connector object id
1545 *
1546 * This function looks up the connector object specified by id
1547 * add takes a reference to it.
1548 */
1549static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
1550 struct drm_file *file_priv,
1551 uint32_t id)
1552{
1553 struct drm_mode_object *mo;
1554 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CONNECTOR);
1555 return mo ? obj_to_connector(mo) : NULL;
1556}
1557
1558/**
1559 * drm_connector_get - acquire a connector reference
1560 * @connector: DRM connector
1561 *
1562 * This function increments the connector's refcount.
1563 */
1564static inline void drm_connector_get(struct drm_connector *connector)
1565{
1566 drm_mode_object_get(&connector->base);
1567}
1568
1569/**
1570 * drm_connector_put - release a connector reference
1571 * @connector: DRM connector
1572 *
1573 * This function decrements the connector's reference count and frees the
1574 * object if the reference count drops to zero.
1575 */
1576static inline void drm_connector_put(struct drm_connector *connector)
1577{
1578 drm_mode_object_put(&connector->base);
1579}
1580
1581/**
1582 * drm_connector_is_unregistered - has the connector been unregistered from
1583 * userspace?
1584 * @connector: DRM connector
1585 *
1586 * Checks whether or not @connector has been unregistered from userspace.
1587 *
1588 * Returns:
1589 * True if the connector was unregistered, false if the connector is
1590 * registered or has not yet been registered with userspace.
1591 */
1592static inline bool
1593drm_connector_is_unregistered(struct drm_connector *connector)
1594{
1595 return READ_ONCE(connector->registration_state) ==
1596 DRM_CONNECTOR_UNREGISTERED;
1597}
1598
1599const char *drm_get_connector_type_name(unsigned int connector_type);
1600const char *drm_get_connector_status_name(enum drm_connector_status status);
1601const char *drm_get_subpixel_order_name(enum subpixel_order order);
1602const char *drm_get_dpms_name(int val);
1603const char *drm_get_dvi_i_subconnector_name(int val);
1604const char *drm_get_dvi_i_select_name(int val);
1605const char *drm_get_tv_subconnector_name(int val);
1606const char *drm_get_tv_select_name(int val);
1607const char *drm_get_content_protection_name(int val);
1608const char *drm_get_hdcp_content_type_name(int val);
1609
1610int drm_mode_create_dvi_i_properties(struct drm_device *dev);
1611int drm_mode_create_tv_margin_properties(struct drm_device *dev);
1612int drm_mode_create_tv_properties(struct drm_device *dev,
1613 unsigned int num_modes,
1614 const char * const modes[]);
1615void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
1616int drm_mode_create_scaling_mode_property(struct drm_device *dev);
1617int drm_connector_attach_content_type_property(struct drm_connector *dev);
1618int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1619 u32 scaling_mode_mask);
1620int drm_connector_attach_vrr_capable_property(
1621 struct drm_connector *connector);
1622int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
1623int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector);
1624int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);
1625int drm_mode_create_content_type_property(struct drm_device *dev);
1626void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1627 const struct drm_connector_state *conn_state);
1628
1629int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
1630
1631int drm_connector_set_path_property(struct drm_connector *connector,
1632 const char *path);
1633int drm_connector_set_tile_property(struct drm_connector *connector);
1634int drm_connector_update_edid_property(struct drm_connector *connector,
1635 const struct edid *edid);
1636void drm_connector_set_link_status_property(struct drm_connector *connector,
1637 uint64_t link_status);
1638void drm_connector_set_vrr_capable_property(
1639 struct drm_connector *connector, bool capable);
1640int drm_connector_set_panel_orientation(
1641 struct drm_connector *connector,
1642 enum drm_panel_orientation panel_orientation);
1643int drm_connector_set_panel_orientation_with_quirk(
1644 struct drm_connector *connector,
1645 enum drm_panel_orientation panel_orientation,
1646 int width, int height);
1647int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
1648 int min, int max);
1649
1650/**
1651 * struct drm_tile_group - Tile group metadata
1652 * @refcount: reference count
1653 * @dev: DRM device
1654 * @id: tile group id exposed to userspace
1655 * @group_data: Sink-private data identifying this group
1656 *
1657 * @group_data corresponds to displayid vend/prod/serial for external screens
1658 * with an EDID.
1659 */
1660struct drm_tile_group {
1661 struct kref refcount;
1662 struct drm_device *dev;
1663 int id;
1664 u8 group_data[8];
1665};
1666
1667struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1668 const char topology[8]);
1669struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1670 const char topology[8]);
1671void drm_mode_put_tile_group(struct drm_device *dev,
1672 struct drm_tile_group *tg);
1673
1674/**
1675 * struct drm_connector_list_iter - connector_list iterator
1676 *
1677 * This iterator tracks state needed to be able to walk the connector_list
1678 * within struct drm_mode_config. Only use together with
1679 * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and
1680 * drm_connector_list_iter_next() respectively the convenience macro
1681 * drm_for_each_connector_iter().
1682 */
1683struct drm_connector_list_iter {
1684/* private: */
1685 struct drm_device *dev;
1686 struct drm_connector *conn;
1687};
1688
1689void drm_connector_list_iter_begin(struct drm_device *dev,
1690 struct drm_connector_list_iter *iter);
1691struct drm_connector *
1692drm_connector_list_iter_next(struct drm_connector_list_iter *iter);
1693void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
1694
1695bool drm_connector_has_possible_encoder(struct drm_connector *connector,
1696 struct drm_encoder *encoder);
1697
1698/**
1699 * drm_for_each_connector_iter - connector_list iterator macro
1700 * @connector: &struct drm_connector pointer used as cursor
1701 * @iter: &struct drm_connector_list_iter
1702 *
1703 * Note that @connector is only valid within the list body, if you want to use
1704 * @connector after calling drm_connector_list_iter_end() then you need to grab
1705 * your own reference first using drm_connector_get().
1706 */
1707#define drm_for_each_connector_iter(connector, iter) \
1708 while ((connector = drm_connector_list_iter_next(iter)))
1709
1710/**
1711 * drm_connector_for_each_possible_encoder - iterate connector's possible encoders
1712 * @connector: &struct drm_connector pointer
1713 * @encoder: &struct drm_encoder pointer used as cursor
1714 */
1715#define drm_connector_for_each_possible_encoder(connector, encoder) \
1716 drm_for_each_encoder_mask(encoder, (connector)->dev, \
1717 (connector)->possible_encoders)
1718
1719#endif