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 <linux/notifier.h>
31 #include <drm/drm_mode_object.h>
32 #include <drm/drm_util.h>
33 
34 #include <uapi/drm/drm_mode.h>
35 
36 struct drm_connector_helper_funcs;
37 struct drm_modeset_acquire_ctx;
38 struct drm_device;
39 struct drm_crtc;
40 struct drm_encoder;
41 struct drm_property;
42 struct drm_property_blob;
43 struct drm_printer;
44 struct drm_privacy_screen;
45 struct edid;
46 struct i2c_adapter;
47 
48 enum drm_connector_force {
49 	DRM_FORCE_UNSPECIFIED,
50 	DRM_FORCE_OFF,
51 	DRM_FORCE_ON,         /* force on analog part normally */
52 	DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
53 };
54 
55 /**
56  * enum drm_connector_status - status for a &drm_connector
57  *
58  * This enum is used to track the connector status. There are no separate
59  * #defines for the uapi!
60  */
61 enum drm_connector_status {
62 	/**
63 	 * @connector_status_connected: The connector is definitely connected to
64 	 * a sink device, and can be enabled.
65 	 */
66 	connector_status_connected = 1,
67 	/**
68 	 * @connector_status_disconnected: The connector isn't connected to a
69 	 * sink device which can be autodetect. For digital outputs like DP or
70 	 * HDMI (which can be realiable probed) this means there's really
71 	 * nothing there. It is driver-dependent whether a connector with this
72 	 * status can be lit up or not.
73 	 */
74 	connector_status_disconnected = 2,
75 	/**
76 	 * @connector_status_unknown: The connector's status could not be
77 	 * reliably detected. This happens when probing would either cause
78 	 * flicker (like load-detection when the connector is in use), or when a
79 	 * hardware resource isn't available (like when load-detection needs a
80 	 * free CRTC). It should be possible to light up the connector with one
81 	 * of the listed fallback modes. For default configuration userspace
82 	 * should only try to light up connectors with unknown status when
83 	 * there's not connector with @connector_status_connected.
84 	 */
85 	connector_status_unknown = 3,
86 };
87 
88 /**
89  * enum drm_connector_registration_state - userspace registration status for
90  * a &drm_connector
91  *
92  * This enum is used to track the status of initializing a connector and
93  * registering it with userspace, so that DRM can prevent bogus modesets on
94  * connectors that no longer exist.
95  */
96 enum drm_connector_registration_state {
97 	/**
98 	 * @DRM_CONNECTOR_INITIALIZING: The connector has just been created,
99 	 * but has yet to be exposed to userspace. There should be no
100 	 * additional restrictions to how the state of this connector may be
101 	 * modified.
102 	 */
103 	DRM_CONNECTOR_INITIALIZING = 0,
104 
105 	/**
106 	 * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized
107 	 * and registered with sysfs, as such it has been exposed to
108 	 * userspace. There should be no additional restrictions to how the
109 	 * state of this connector may be modified.
110 	 */
111 	DRM_CONNECTOR_REGISTERED = 1,
112 
113 	/**
114 	 * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed
115 	 * to userspace and has since been unregistered and removed from
116 	 * userspace, or the connector was unregistered before it had a chance
117 	 * to be exposed to userspace (e.g. still in the
118 	 * @DRM_CONNECTOR_INITIALIZING state). When a connector is
119 	 * unregistered, there are additional restrictions to how its state
120 	 * may be modified:
121 	 *
122 	 * - An unregistered connector may only have its DPMS changed from
123 	 *   On->Off. Once DPMS is changed to Off, it may not be switched back
124 	 *   to On.
125 	 * - Modesets are not allowed on unregistered connectors, unless they
126 	 *   would result in disabling its assigned CRTCs. This means
127 	 *   disabling a CRTC on an unregistered connector is OK, but enabling
128 	 *   one is not.
129 	 * - Removing a CRTC from an unregistered connector is OK, but new
130 	 *   CRTCs may never be assigned to an unregistered connector.
131 	 */
132 	DRM_CONNECTOR_UNREGISTERED = 2,
133 };
134 
135 enum subpixel_order {
136 	SubPixelUnknown = 0,
137 	SubPixelHorizontalRGB,
138 	SubPixelHorizontalBGR,
139 	SubPixelVerticalRGB,
140 	SubPixelVerticalBGR,
141 	SubPixelNone,
142 
143 };
144 
145 /**
146  * struct drm_scrambling: sink's scrambling support.
147  */
148 struct drm_scrambling {
149 	/**
150 	 * @supported: scrambling supported for rates > 340 Mhz.
151 	 */
152 	bool supported;
153 	/**
154 	 * @low_rates: scrambling supported for rates <= 340 Mhz.
155 	 */
156 	bool low_rates;
157 };
158 
159 /*
160  * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink
161  *
162  * Provides SCDC register support and capabilities related information on a
163  * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0.
164  */
165 struct drm_scdc {
166 	/**
167 	 * @supported: status control & data channel present.
168 	 */
169 	bool supported;
170 	/**
171 	 * @read_request: sink is capable of generating scdc read request.
172 	 */
173 	bool read_request;
174 	/**
175 	 * @scrambling: sink's scrambling capabilities
176 	 */
177 	struct drm_scrambling scrambling;
178 };
179 
180 /**
181  * struct drm_hdmi_dsc_cap - DSC capabilities of HDMI sink
182  *
183  * Describes the DSC support provided by HDMI 2.1 sink.
184  * The information is fetched fom additional HFVSDB blocks defined
185  * for HDMI 2.1.
186  */
187 struct drm_hdmi_dsc_cap {
188 	/** @v_1p2: flag for dsc1.2 version support by sink */
189 	bool v_1p2;
190 
191 	/** @native_420: Does sink support DSC with 4:2:0 compression */
192 	bool native_420;
193 
194 	/**
195 	 * @all_bpp: Does sink support all bpp with 4:4:4: or 4:2:2
196 	 * compressed formats
197 	 */
198 	bool all_bpp;
199 
200 	/**
201 	 * @bpc_supported: compressed bpc supported by sink : 10, 12 or 16 bpc
202 	 */
203 	u8 bpc_supported;
204 
205 	/** @max_slices: maximum number of Horizontal slices supported by */
206 	u8 max_slices;
207 
208 	/** @clk_per_slice : max pixel clock in MHz supported per slice */
209 	int clk_per_slice;
210 
211 	/** @max_lanes : dsc max lanes supported for Fixed rate Link training */
212 	u8 max_lanes;
213 
214 	/** @max_frl_rate_per_lane : maximum frl rate with DSC per lane */
215 	u8 max_frl_rate_per_lane;
216 
217 	/** @total_chunk_kbytes: max size of chunks in KBs supported per line*/
218 	u8 total_chunk_kbytes;
219 };
220 
221 /**
222  * struct drm_hdmi_info - runtime information about the connected HDMI sink
223  *
224  * Describes if a given display supports advanced HDMI 2.0 features.
225  * This information is available in CEA-861-F extension blocks (like HF-VSDB).
226  */
227 struct drm_hdmi_info {
228 	/** @scdc: sink's scdc support and capabilities */
229 	struct drm_scdc scdc;
230 
231 	/**
232 	 * @y420_vdb_modes: bitmap of modes which can support ycbcr420
233 	 * output only (not normal RGB/YCBCR444/422 outputs). The max VIC
234 	 * defined by the CEA-861-G spec is 219, so the size is 256 bits to map
235 	 * up to 256 VICs.
236 	 */
237 	unsigned long y420_vdb_modes[BITS_TO_LONGS(256)];
238 
239 	/**
240 	 * @y420_cmdb_modes: bitmap of modes which can support ycbcr420
241 	 * output also, along with normal HDMI outputs. The max VIC defined by
242 	 * the CEA-861-G spec is 219, so the size is 256 bits to map up to 256
243 	 * VICs.
244 	 */
245 	unsigned long y420_cmdb_modes[BITS_TO_LONGS(256)];
246 
247 	/** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
248 	u64 y420_cmdb_map;
249 
250 	/** @y420_dc_modes: bitmap of deep color support index */
251 	u8 y420_dc_modes;
252 
253 	/** @max_frl_rate_per_lane: support fixed rate link */
254 	u8 max_frl_rate_per_lane;
255 
256 	/** @max_lanes: supported by sink */
257 	u8 max_lanes;
258 
259 	/** @dsc_cap: DSC capabilities of the sink */
260 	struct drm_hdmi_dsc_cap dsc_cap;
261 };
262 
263 /**
264  * enum drm_link_status - connector's link_status property value
265  *
266  * This enum is used as the connector's link status property value.
267  * It is set to the values defined in uapi.
268  *
269  * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful
270  *                        link training
271  * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training
272  *                       failure
273  */
274 enum drm_link_status {
275 	DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD,
276 	DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD,
277 };
278 
279 /**
280  * enum drm_panel_orientation - panel_orientation info for &drm_display_info
281  *
282  * This enum is used to track the (LCD) panel orientation. There are no
283  * separate #defines for the uapi!
284  *
285  * @DRM_MODE_PANEL_ORIENTATION_UNKNOWN: The drm driver has not provided any
286  *					panel orientation information (normal
287  *					for non panels) in this case the "panel
288  *					orientation" connector prop will not be
289  *					attached.
290  * @DRM_MODE_PANEL_ORIENTATION_NORMAL:	The top side of the panel matches the
291  *					top side of the device's casing.
292  * @DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: The top side of the panel matches the
293  *					bottom side of the device's casing, iow
294  *					the panel is mounted upside-down.
295  * @DRM_MODE_PANEL_ORIENTATION_LEFT_UP:	The left side of the panel matches the
296  *					top side of the device's casing.
297  * @DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: The right side of the panel matches the
298  *					top side of the device's casing.
299  */
300 enum drm_panel_orientation {
301 	DRM_MODE_PANEL_ORIENTATION_UNKNOWN = -1,
302 	DRM_MODE_PANEL_ORIENTATION_NORMAL = 0,
303 	DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP,
304 	DRM_MODE_PANEL_ORIENTATION_LEFT_UP,
305 	DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
306 };
307 
308 /**
309  * struct drm_monitor_range_info - Panel's Monitor range in EDID for
310  * &drm_display_info
311  *
312  * This struct is used to store a frequency range supported by panel
313  * as parsed from EDID's detailed monitor range descriptor block.
314  *
315  * @min_vfreq: This is the min supported refresh rate in Hz from
316  *             EDID's detailed monitor range.
317  * @max_vfreq: This is the max supported refresh rate in Hz from
318  *             EDID's detailed monitor range
319  */
320 struct drm_monitor_range_info {
321 	u8 min_vfreq;
322 	u8 max_vfreq;
323 };
324 
325 /**
326  * enum drm_privacy_screen_status - privacy screen status
327  *
328  * This enum is used to track and control the state of the integrated privacy
329  * screen present on some display panels, via the "privacy-screen sw-state"
330  * and "privacy-screen hw-state" properties. Note the _LOCKED enum values
331  * are only valid for the "privacy-screen hw-state" property.
332  *
333  * @PRIVACY_SCREEN_DISABLED:
334  *  The privacy-screen on the panel is disabled
335  * @PRIVACY_SCREEN_ENABLED:
336  *  The privacy-screen on the panel is enabled
337  * @PRIVACY_SCREEN_DISABLED_LOCKED:
338  *  The privacy-screen on the panel is disabled and locked (cannot be changed)
339  * @PRIVACY_SCREEN_ENABLED_LOCKED:
340  *  The privacy-screen on the panel is enabled and locked (cannot be changed)
341  */
342 enum drm_privacy_screen_status {
343 	PRIVACY_SCREEN_DISABLED = 0,
344 	PRIVACY_SCREEN_ENABLED,
345 	PRIVACY_SCREEN_DISABLED_LOCKED,
346 	PRIVACY_SCREEN_ENABLED_LOCKED,
347 };
348 
349 /*
350  * This is a consolidated colorimetry list supported by HDMI and
351  * DP protocol standard. The respective connectors will register
352  * a property with the subset of this list (supported by that
353  * respective protocol). Userspace will set the colorspace through
354  * a colorspace property which will be created and exposed to
355  * userspace.
356  */
357 
358 /* For Default case, driver will set the colorspace */
359 #define DRM_MODE_COLORIMETRY_DEFAULT			0
360 /* CEA 861 Normal Colorimetry options */
361 #define DRM_MODE_COLORIMETRY_NO_DATA			0
362 #define DRM_MODE_COLORIMETRY_SMPTE_170M_YCC		1
363 #define DRM_MODE_COLORIMETRY_BT709_YCC			2
364 /* CEA 861 Extended Colorimetry Options */
365 #define DRM_MODE_COLORIMETRY_XVYCC_601			3
366 #define DRM_MODE_COLORIMETRY_XVYCC_709			4
367 #define DRM_MODE_COLORIMETRY_SYCC_601			5
368 #define DRM_MODE_COLORIMETRY_OPYCC_601			6
369 #define DRM_MODE_COLORIMETRY_OPRGB			7
370 #define DRM_MODE_COLORIMETRY_BT2020_CYCC		8
371 #define DRM_MODE_COLORIMETRY_BT2020_RGB			9
372 #define DRM_MODE_COLORIMETRY_BT2020_YCC			10
373 /* Additional Colorimetry extension added as part of CTA 861.G */
374 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65		11
375 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER		12
376 /* Additional Colorimetry Options added for DP 1.4a VSC Colorimetry Format */
377 #define DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED		13
378 #define DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT		14
379 #define DRM_MODE_COLORIMETRY_BT601_YCC			15
380 
381 /**
382  * enum drm_bus_flags - bus_flags info for &drm_display_info
383  *
384  * This enum defines signal polarities and clock edge information for signals on
385  * a bus as bitmask flags.
386  *
387  * The clock edge information is conveyed by two sets of symbols,
388  * DRM_BUS_FLAGS_*_DRIVE_\* and DRM_BUS_FLAGS_*_SAMPLE_\*. When this enum is
389  * used to describe a bus from the point of view of the transmitter, the
390  * \*_DRIVE_\* flags should be used. When used from the point of view of the
391  * receiver, the \*_SAMPLE_\* flags should be used. The \*_DRIVE_\* and
392  * \*_SAMPLE_\* flags alias each other, with the \*_SAMPLE_POSEDGE and
393  * \*_SAMPLE_NEGEDGE flags being equal to \*_DRIVE_NEGEDGE and \*_DRIVE_POSEDGE
394  * respectively. This simplifies code as signals are usually sampled on the
395  * opposite edge of the driving edge. Transmitters and receivers may however
396  * need to take other signal timings into account to convert between driving
397  * and sample edges.
398  */
399 enum drm_bus_flags {
400 	/**
401 	 * @DRM_BUS_FLAG_DE_LOW:
402 	 *
403 	 * The Data Enable signal is active low
404 	 */
405 	DRM_BUS_FLAG_DE_LOW = BIT(0),
406 
407 	/**
408 	 * @DRM_BUS_FLAG_DE_HIGH:
409 	 *
410 	 * The Data Enable signal is active high
411 	 */
412 	DRM_BUS_FLAG_DE_HIGH = BIT(1),
413 
414 	/**
415 	 * @DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE:
416 	 *
417 	 * Data is driven on the rising edge of the pixel clock
418 	 */
419 	DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE = BIT(2),
420 
421 	/**
422 	 * @DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE:
423 	 *
424 	 * Data is driven on the falling edge of the pixel clock
425 	 */
426 	DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE = BIT(3),
427 
428 	/**
429 	 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE:
430 	 *
431 	 * Data is sampled on the rising edge of the pixel clock
432 	 */
433 	DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
434 
435 	/**
436 	 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE:
437 	 *
438 	 * Data is sampled on the falling edge of the pixel clock
439 	 */
440 	DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
441 
442 	/**
443 	 * @DRM_BUS_FLAG_DATA_MSB_TO_LSB:
444 	 *
445 	 * Data is transmitted MSB to LSB on the bus
446 	 */
447 	DRM_BUS_FLAG_DATA_MSB_TO_LSB = BIT(4),
448 
449 	/**
450 	 * @DRM_BUS_FLAG_DATA_LSB_TO_MSB:
451 	 *
452 	 * Data is transmitted LSB to MSB on the bus
453 	 */
454 	DRM_BUS_FLAG_DATA_LSB_TO_MSB = BIT(5),
455 
456 	/**
457 	 * @DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE:
458 	 *
459 	 * Sync signals are driven on the rising edge of the pixel clock
460 	 */
461 	DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE = BIT(6),
462 
463 	/**
464 	 * @DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE:
465 	 *
466 	 * Sync signals are driven on the falling edge of the pixel clock
467 	 */
468 	DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE = BIT(7),
469 
470 	/**
471 	 * @DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE:
472 	 *
473 	 * Sync signals are sampled on the rising edge of the pixel clock
474 	 */
475 	DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE = DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE,
476 
477 	/**
478 	 * @DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE:
479 	 *
480 	 * Sync signals are sampled on the falling edge of the pixel clock
481 	 */
482 	DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE = DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE,
483 
484 	/**
485 	 * @DRM_BUS_FLAG_SHARP_SIGNALS:
486 	 *
487 	 *  Set if the Sharp-specific signals (SPL, CLS, PS, REV) must be used
488 	 */
489 	DRM_BUS_FLAG_SHARP_SIGNALS = BIT(8),
490 };
491 
492 /**
493  * struct drm_display_info - runtime data about the connected sink
494  *
495  * Describes a given display (e.g. CRT or flat panel) and its limitations. For
496  * fixed display sinks like built-in panels there's not much difference between
497  * this and &struct drm_connector. But for sinks with a real cable this
498  * structure is meant to describe all the things at the other end of the cable.
499  *
500  * For sinks which provide an EDID this can be filled out by calling
501  * drm_add_edid_modes().
502  */
503 struct drm_display_info {
504 	/**
505 	 * @width_mm: Physical width in mm.
506 	 */
507 	unsigned int width_mm;
508 
509 	/**
510 	 * @height_mm: Physical height in mm.
511 	 */
512 	unsigned int height_mm;
513 
514 	/**
515 	 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
516 	 */
517 	unsigned int bpc;
518 
519 	/**
520 	 * @subpixel_order: Subpixel order of LCD panels.
521 	 */
522 	enum subpixel_order subpixel_order;
523 
524 #define DRM_COLOR_FORMAT_RGB444		(1<<0)
525 #define DRM_COLOR_FORMAT_YCBCR444	(1<<1)
526 #define DRM_COLOR_FORMAT_YCBCR422	(1<<2)
527 #define DRM_COLOR_FORMAT_YCBCR420	(1<<3)
528 
529 	/**
530 	 * @panel_orientation: Read only connector property for built-in panels,
531 	 * indicating the orientation of the panel vs the device's casing.
532 	 * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN.
533 	 * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the
534 	 * fb to compensate and gets exported as prop to userspace.
535 	 */
536 	int panel_orientation;
537 
538 	/**
539 	 * @color_formats: HDMI Color formats, selects between RGB and YCrCb
540 	 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
541 	 * as used to describe the pixel format in framebuffers, and also don't
542 	 * match the formats in @bus_formats which are shared with v4l.
543 	 */
544 	u32 color_formats;
545 
546 	/**
547 	 * @bus_formats: Pixel data format on the wire, somewhat redundant with
548 	 * @color_formats. Array of size @num_bus_formats encoded using
549 	 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
550 	 */
551 	const u32 *bus_formats;
552 	/**
553 	 * @num_bus_formats: Size of @bus_formats array.
554 	 */
555 	unsigned int num_bus_formats;
556 
557 	/**
558 	 * @bus_flags: Additional information (like pixel signal polarity) for
559 	 * the pixel data on the bus, using &enum drm_bus_flags values
560 	 * DRM_BUS_FLAGS\_.
561 	 */
562 	u32 bus_flags;
563 
564 	/**
565 	 * @max_tmds_clock: Maximum TMDS clock rate supported by the
566 	 * sink in kHz. 0 means undefined.
567 	 */
568 	int max_tmds_clock;
569 
570 	/**
571 	 * @dvi_dual: Dual-link DVI sink?
572 	 */
573 	bool dvi_dual;
574 
575 	/**
576 	 * @is_hdmi: True if the sink is an HDMI device.
577 	 *
578 	 * This field shall be used instead of calling
579 	 * drm_detect_hdmi_monitor() when possible.
580 	 */
581 	bool is_hdmi;
582 
583 	/**
584 	 * @has_hdmi_infoframe: Does the sink support the HDMI infoframe?
585 	 */
586 	bool has_hdmi_infoframe;
587 
588 	/**
589 	 * @rgb_quant_range_selectable: Does the sink support selecting
590 	 * the RGB quantization range?
591 	 */
592 	bool rgb_quant_range_selectable;
593 
594 	/**
595 	 * @edid_hdmi_rgb444_dc_modes: Mask of supported hdmi deep color modes
596 	 * in RGB 4:4:4. Even more stuff redundant with @bus_formats.
597 	 */
598 	u8 edid_hdmi_rgb444_dc_modes;
599 
600 	/**
601 	 * @edid_hdmi_ycbcr444_dc_modes: Mask of supported hdmi deep color
602 	 * modes in YCbCr 4:4:4. Even more stuff redundant with @bus_formats.
603 	 */
604 	u8 edid_hdmi_ycbcr444_dc_modes;
605 
606 	/**
607 	 * @cea_rev: CEA revision of the HDMI sink.
608 	 */
609 	u8 cea_rev;
610 
611 	/**
612 	 * @hdmi: advance features of a HDMI sink.
613 	 */
614 	struct drm_hdmi_info hdmi;
615 
616 	/**
617 	 * @non_desktop: Non desktop display (HMD).
618 	 */
619 	bool non_desktop;
620 
621 	/**
622 	 * @monitor_range: Frequency range supported by monitor range descriptor
623 	 */
624 	struct drm_monitor_range_info monitor_range;
625 
626 	/**
627 	 * @mso_stream_count: eDP Multi-SST Operation (MSO) stream count from
628 	 * the DisplayID VESA vendor block. 0 for conventional Single-Stream
629 	 * Transport (SST), or 2 or 4 MSO streams.
630 	 */
631 	u8 mso_stream_count;
632 
633 	/**
634 	 * @mso_pixel_overlap: eDP MSO segment pixel overlap, 0-8 pixels.
635 	 */
636 	u8 mso_pixel_overlap;
637 };
638 
639 int drm_display_info_set_bus_formats(struct drm_display_info *info,
640 				     const u32 *formats,
641 				     unsigned int num_formats);
642 
643 /**
644  * struct drm_connector_tv_margins - TV connector related margins
645  *
646  * Describes the margins in pixels to put around the image on TV
647  * connectors to deal with overscan.
648  */
649 struct drm_connector_tv_margins {
650 	/**
651 	 * @bottom: Bottom margin in pixels.
652 	 */
653 	unsigned int bottom;
654 
655 	/**
656 	 * @left: Left margin in pixels.
657 	 */
658 	unsigned int left;
659 
660 	/**
661 	 * @right: Right margin in pixels.
662 	 */
663 	unsigned int right;
664 
665 	/**
666 	 * @top: Top margin in pixels.
667 	 */
668 	unsigned int top;
669 };
670 
671 /**
672  * struct drm_tv_connector_state - TV connector related states
673  * @subconnector: selected subconnector
674  * @margins: TV margins
675  * @mode: TV mode
676  * @brightness: brightness in percent
677  * @contrast: contrast in percent
678  * @flicker_reduction: flicker reduction in percent
679  * @overscan: overscan in percent
680  * @saturation: saturation in percent
681  * @hue: hue in percent
682  */
683 struct drm_tv_connector_state {
684 	enum drm_mode_subconnector subconnector;
685 	struct drm_connector_tv_margins margins;
686 	unsigned int mode;
687 	unsigned int brightness;
688 	unsigned int contrast;
689 	unsigned int flicker_reduction;
690 	unsigned int overscan;
691 	unsigned int saturation;
692 	unsigned int hue;
693 };
694 
695 /**
696  * struct drm_connector_state - mutable connector state
697  */
698 struct drm_connector_state {
699 	/** @connector: backpointer to the connector */
700 	struct drm_connector *connector;
701 
702 	/**
703 	 * @crtc: CRTC to connect connector to, NULL if disabled.
704 	 *
705 	 * Do not change this directly, use drm_atomic_set_crtc_for_connector()
706 	 * instead.
707 	 */
708 	struct drm_crtc *crtc;
709 
710 	/**
711 	 * @best_encoder:
712 	 *
713 	 * Used by the atomic helpers to select the encoder, through the
714 	 * &drm_connector_helper_funcs.atomic_best_encoder or
715 	 * &drm_connector_helper_funcs.best_encoder callbacks.
716 	 *
717 	 * This is also used in the atomic helpers to map encoders to their
718 	 * current and previous connectors, see
719 	 * drm_atomic_get_old_connector_for_encoder() and
720 	 * drm_atomic_get_new_connector_for_encoder().
721 	 *
722 	 * NOTE: Atomic drivers must fill this out (either themselves or through
723 	 * helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will
724 	 * not return correct data to userspace.
725 	 */
726 	struct drm_encoder *best_encoder;
727 
728 	/**
729 	 * @link_status: Connector link_status to keep track of whether link is
730 	 * GOOD or BAD to notify userspace if retraining is necessary.
731 	 */
732 	enum drm_link_status link_status;
733 
734 	/** @state: backpointer to global drm_atomic_state */
735 	struct drm_atomic_state *state;
736 
737 	/**
738 	 * @commit: Tracks the pending commit to prevent use-after-free conditions.
739 	 *
740 	 * Is only set when @crtc is NULL.
741 	 */
742 	struct drm_crtc_commit *commit;
743 
744 	/** @tv: TV connector state */
745 	struct drm_tv_connector_state tv;
746 
747 	/**
748 	 * @self_refresh_aware:
749 	 *
750 	 * This tracks whether a connector is aware of the self refresh state.
751 	 * It should be set to true for those connector implementations which
752 	 * understand the self refresh state. This is needed since the crtc
753 	 * registers the self refresh helpers and it doesn't know if the
754 	 * connectors downstream have implemented self refresh entry/exit.
755 	 *
756 	 * Drivers should set this to true in atomic_check if they know how to
757 	 * handle self_refresh requests.
758 	 */
759 	bool self_refresh_aware;
760 
761 	/**
762 	 * @picture_aspect_ratio: Connector property to control the
763 	 * HDMI infoframe aspect ratio setting.
764 	 *
765 	 * The %DRM_MODE_PICTURE_ASPECT_\* values much match the
766 	 * values for &enum hdmi_picture_aspect
767 	 */
768 	enum hdmi_picture_aspect picture_aspect_ratio;
769 
770 	/**
771 	 * @content_type: Connector property to control the
772 	 * HDMI infoframe content type setting.
773 	 * The %DRM_MODE_CONTENT_TYPE_\* values much
774 	 * match the values.
775 	 */
776 	unsigned int content_type;
777 
778 	/**
779 	 * @hdcp_content_type: Connector property to pass the type of
780 	 * protected content. This is most commonly used for HDCP.
781 	 */
782 	unsigned int hdcp_content_type;
783 
784 	/**
785 	 * @scaling_mode: Connector property to control the
786 	 * upscaling, mostly used for built-in panels.
787 	 */
788 	unsigned int scaling_mode;
789 
790 	/**
791 	 * @content_protection: Connector property to request content
792 	 * protection. This is most commonly used for HDCP.
793 	 */
794 	unsigned int content_protection;
795 
796 	/**
797 	 * @colorspace: State variable for Connector property to request
798 	 * colorspace change on Sink. This is most commonly used to switch
799 	 * to wider color gamuts like BT2020.
800 	 */
801 	u32 colorspace;
802 
803 	/**
804 	 * @writeback_job: Writeback job for writeback connectors
805 	 *
806 	 * Holds the framebuffer and out-fence for a writeback connector. As
807 	 * the writeback completion may be asynchronous to the normal commit
808 	 * cycle, the writeback job lifetime is managed separately from the
809 	 * normal atomic state by this object.
810 	 *
811 	 * See also: drm_writeback_queue_job() and
812 	 * drm_writeback_signal_completion()
813 	 */
814 	struct drm_writeback_job *writeback_job;
815 
816 	/**
817 	 * @max_requested_bpc: Connector property to limit the maximum bit
818 	 * depth of the pixels.
819 	 */
820 	u8 max_requested_bpc;
821 
822 	/**
823 	 * @max_bpc: Connector max_bpc based on the requested max_bpc property
824 	 * and the connector bpc limitations obtained from edid.
825 	 */
826 	u8 max_bpc;
827 
828 	/**
829 	 * @privacy_screen_sw_state: See :ref:`Standard Connector
830 	 * Properties<standard_connector_properties>`
831 	 */
832 	enum drm_privacy_screen_status privacy_screen_sw_state;
833 
834 	/**
835 	 * @hdr_output_metadata:
836 	 * DRM blob property for HDR output metadata
837 	 */
838 	struct drm_property_blob *hdr_output_metadata;
839 };
840 
841 /**
842  * struct drm_connector_funcs - control connectors on a given device
843  *
844  * Each CRTC may have one or more connectors attached to it.  The functions
845  * below allow the core DRM code to control connectors, enumerate available modes,
846  * etc.
847  */
848 struct drm_connector_funcs {
849 	/**
850 	 * @dpms:
851 	 *
852 	 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
853 	 * is exposed as a standard property on the connector, but diverted to
854 	 * this callback in the drm core. Note that atomic drivers don't
855 	 * implement the 4 level DPMS support on the connector any more, but
856 	 * instead only have an on/off "ACTIVE" property on the CRTC object.
857 	 *
858 	 * This hook is not used by atomic drivers, remapping of the legacy DPMS
859 	 * property is entirely handled in the DRM core.
860 	 *
861 	 * RETURNS:
862 	 *
863 	 * 0 on success or a negative error code on failure.
864 	 */
865 	int (*dpms)(struct drm_connector *connector, int mode);
866 
867 	/**
868 	 * @reset:
869 	 *
870 	 * Reset connector hardware and software state to off. This function isn't
871 	 * called by the core directly, only through drm_mode_config_reset().
872 	 * It's not a helper hook only for historical reasons.
873 	 *
874 	 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
875 	 * atomic state using this hook.
876 	 */
877 	void (*reset)(struct drm_connector *connector);
878 
879 	/**
880 	 * @detect:
881 	 *
882 	 * Check to see if anything is attached to the connector. The parameter
883 	 * force is set to false whilst polling, true when checking the
884 	 * connector due to a user request. force can be used by the driver to
885 	 * avoid expensive, destructive operations during automated probing.
886 	 *
887 	 * This callback is optional, if not implemented the connector will be
888 	 * considered as always being attached.
889 	 *
890 	 * FIXME:
891 	 *
892 	 * Note that this hook is only called by the probe helper. It's not in
893 	 * the helper library vtable purely for historical reasons. The only DRM
894 	 * core	entry point to probe connector state is @fill_modes.
895 	 *
896 	 * Note that the helper library will already hold
897 	 * &drm_mode_config.connection_mutex. Drivers which need to grab additional
898 	 * locks to avoid races with concurrent modeset changes need to use
899 	 * &drm_connector_helper_funcs.detect_ctx instead.
900 	 *
901 	 * Also note that this callback can be called no matter the
902 	 * state the connector is in. Drivers that need the underlying
903 	 * device to be powered to perform the detection will first need
904 	 * to make sure it's been properly enabled.
905 	 *
906 	 * RETURNS:
907 	 *
908 	 * drm_connector_status indicating the connector's status.
909 	 */
910 	enum drm_connector_status (*detect)(struct drm_connector *connector,
911 					    bool force);
912 
913 	/**
914 	 * @force:
915 	 *
916 	 * This function is called to update internal encoder state when the
917 	 * connector is forced to a certain state by userspace, either through
918 	 * the sysfs interfaces or on the kernel cmdline. In that case the
919 	 * @detect callback isn't called.
920 	 *
921 	 * FIXME:
922 	 *
923 	 * Note that this hook is only called by the probe helper. It's not in
924 	 * the helper library vtable purely for historical reasons. The only DRM
925 	 * core	entry point to probe connector state is @fill_modes.
926 	 */
927 	void (*force)(struct drm_connector *connector);
928 
929 	/**
930 	 * @fill_modes:
931 	 *
932 	 * Entry point for output detection and basic mode validation. The
933 	 * driver should reprobe the output if needed (e.g. when hotplug
934 	 * handling is unreliable), add all detected modes to &drm_connector.modes
935 	 * and filter out any the device can't support in any configuration. It
936 	 * also needs to filter out any modes wider or higher than the
937 	 * parameters max_width and max_height indicate.
938 	 *
939 	 * The drivers must also prune any modes no longer valid from
940 	 * &drm_connector.modes. Furthermore it must update
941 	 * &drm_connector.status and &drm_connector.edid.  If no EDID has been
942 	 * received for this output connector->edid must be NULL.
943 	 *
944 	 * Drivers using the probe helpers should use
945 	 * drm_helper_probe_single_connector_modes() to implement this
946 	 * function.
947 	 *
948 	 * RETURNS:
949 	 *
950 	 * The number of modes detected and filled into &drm_connector.modes.
951 	 */
952 	int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
953 
954 	/**
955 	 * @set_property:
956 	 *
957 	 * This is the legacy entry point to update a property attached to the
958 	 * connector.
959 	 *
960 	 * This callback is optional if the driver does not support any legacy
961 	 * driver-private properties. For atomic drivers it is not used because
962 	 * property handling is done entirely in the DRM core.
963 	 *
964 	 * RETURNS:
965 	 *
966 	 * 0 on success or a negative error code on failure.
967 	 */
968 	int (*set_property)(struct drm_connector *connector, struct drm_property *property,
969 			     uint64_t val);
970 
971 	/**
972 	 * @late_register:
973 	 *
974 	 * This optional hook can be used to register additional userspace
975 	 * interfaces attached to the connector, light backlight control, i2c,
976 	 * DP aux or similar interfaces. It is called late in the driver load
977 	 * sequence from drm_connector_register() when registering all the
978 	 * core drm connector interfaces. Everything added from this callback
979 	 * should be unregistered in the early_unregister callback.
980 	 *
981 	 * This is called while holding &drm_connector.mutex.
982 	 *
983 	 * Returns:
984 	 *
985 	 * 0 on success, or a negative error code on failure.
986 	 */
987 	int (*late_register)(struct drm_connector *connector);
988 
989 	/**
990 	 * @early_unregister:
991 	 *
992 	 * This optional hook should be used to unregister the additional
993 	 * userspace interfaces attached to the connector from
994 	 * late_register(). It is called from drm_connector_unregister(),
995 	 * early in the driver unload sequence to disable userspace access
996 	 * before data structures are torndown.
997 	 *
998 	 * This is called while holding &drm_connector.mutex.
999 	 */
1000 	void (*early_unregister)(struct drm_connector *connector);
1001 
1002 	/**
1003 	 * @destroy:
1004 	 *
1005 	 * Clean up connector resources. This is called at driver unload time
1006 	 * through drm_mode_config_cleanup(). It can also be called at runtime
1007 	 * when a connector is being hot-unplugged for drivers that support
1008 	 * connector hotplugging (e.g. DisplayPort MST).
1009 	 */
1010 	void (*destroy)(struct drm_connector *connector);
1011 
1012 	/**
1013 	 * @atomic_duplicate_state:
1014 	 *
1015 	 * Duplicate the current atomic state for this connector and return it.
1016 	 * The core and helpers guarantee that any atomic state duplicated with
1017 	 * this hook and still owned by the caller (i.e. not transferred to the
1018 	 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
1019 	 * cleaned up by calling the @atomic_destroy_state hook in this
1020 	 * structure.
1021 	 *
1022 	 * This callback is mandatory for atomic drivers.
1023 	 *
1024 	 * Atomic drivers which don't subclass &struct drm_connector_state should use
1025 	 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
1026 	 * state structure to extend it with driver-private state should use
1027 	 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
1028 	 * duplicated in a consistent fashion across drivers.
1029 	 *
1030 	 * It is an error to call this hook before &drm_connector.state has been
1031 	 * initialized correctly.
1032 	 *
1033 	 * NOTE:
1034 	 *
1035 	 * If the duplicate state references refcounted resources this hook must
1036 	 * acquire a reference for each of them. The driver must release these
1037 	 * references again in @atomic_destroy_state.
1038 	 *
1039 	 * RETURNS:
1040 	 *
1041 	 * Duplicated atomic state or NULL when the allocation failed.
1042 	 */
1043 	struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
1044 
1045 	/**
1046 	 * @atomic_destroy_state:
1047 	 *
1048 	 * Destroy a state duplicated with @atomic_duplicate_state and release
1049 	 * or unreference all resources it references
1050 	 *
1051 	 * This callback is mandatory for atomic drivers.
1052 	 */
1053 	void (*atomic_destroy_state)(struct drm_connector *connector,
1054 				     struct drm_connector_state *state);
1055 
1056 	/**
1057 	 * @atomic_set_property:
1058 	 *
1059 	 * Decode a driver-private property value and store the decoded value
1060 	 * into the passed-in state structure. Since the atomic core decodes all
1061 	 * standardized properties (even for extensions beyond the core set of
1062 	 * properties which might not be implemented by all drivers) this
1063 	 * requires drivers to subclass the state structure.
1064 	 *
1065 	 * Such driver-private properties should really only be implemented for
1066 	 * truly hardware/vendor specific state. Instead it is preferred to
1067 	 * standardize atomic extension and decode the properties used to expose
1068 	 * such an extension in the core.
1069 	 *
1070 	 * Do not call this function directly, use
1071 	 * drm_atomic_connector_set_property() instead.
1072 	 *
1073 	 * This callback is optional if the driver does not support any
1074 	 * driver-private atomic properties.
1075 	 *
1076 	 * NOTE:
1077 	 *
1078 	 * This function is called in the state assembly phase of atomic
1079 	 * modesets, which can be aborted for any reason (including on
1080 	 * userspace's request to just check whether a configuration would be
1081 	 * possible). Drivers MUST NOT touch any persistent state (hardware or
1082 	 * software) or data structures except the passed in @state parameter.
1083 	 *
1084 	 * Also since userspace controls in which order properties are set this
1085 	 * function must not do any input validation (since the state update is
1086 	 * incomplete and hence likely inconsistent). Instead any such input
1087 	 * validation must be done in the various atomic_check callbacks.
1088 	 *
1089 	 * RETURNS:
1090 	 *
1091 	 * 0 if the property has been found, -EINVAL if the property isn't
1092 	 * implemented by the driver (which shouldn't ever happen, the core only
1093 	 * asks for properties attached to this connector). No other validation
1094 	 * is allowed by the driver. The core already checks that the property
1095 	 * value is within the range (integer, valid enum value, ...) the driver
1096 	 * set when registering the property.
1097 	 */
1098 	int (*atomic_set_property)(struct drm_connector *connector,
1099 				   struct drm_connector_state *state,
1100 				   struct drm_property *property,
1101 				   uint64_t val);
1102 
1103 	/**
1104 	 * @atomic_get_property:
1105 	 *
1106 	 * Reads out the decoded driver-private property. This is used to
1107 	 * implement the GETCONNECTOR IOCTL.
1108 	 *
1109 	 * Do not call this function directly, use
1110 	 * drm_atomic_connector_get_property() instead.
1111 	 *
1112 	 * This callback is optional if the driver does not support any
1113 	 * driver-private atomic properties.
1114 	 *
1115 	 * RETURNS:
1116 	 *
1117 	 * 0 on success, -EINVAL if the property isn't implemented by the
1118 	 * driver (which shouldn't ever happen, the core only asks for
1119 	 * properties attached to this connector).
1120 	 */
1121 	int (*atomic_get_property)(struct drm_connector *connector,
1122 				   const struct drm_connector_state *state,
1123 				   struct drm_property *property,
1124 				   uint64_t *val);
1125 
1126 	/**
1127 	 * @atomic_print_state:
1128 	 *
1129 	 * If driver subclasses &struct drm_connector_state, it should implement
1130 	 * this optional hook for printing additional driver specific state.
1131 	 *
1132 	 * Do not call this directly, use drm_atomic_connector_print_state()
1133 	 * instead.
1134 	 */
1135 	void (*atomic_print_state)(struct drm_printer *p,
1136 				   const struct drm_connector_state *state);
1137 
1138 	/**
1139 	 * @oob_hotplug_event:
1140 	 *
1141 	 * This will get called when a hotplug-event for a drm-connector
1142 	 * has been received from a source outside the display driver / device.
1143 	 */
1144 	void (*oob_hotplug_event)(struct drm_connector *connector);
1145 
1146 	/**
1147 	 * @debugfs_init:
1148 	 *
1149 	 * Allows connectors to create connector-specific debugfs files.
1150 	 */
1151 	void (*debugfs_init)(struct drm_connector *connector, struct dentry *root);
1152 };
1153 
1154 /**
1155  * struct drm_cmdline_mode - DRM Mode passed through the kernel command-line
1156  *
1157  * Each connector can have an initial mode with additional options
1158  * passed through the kernel command line. This structure allows to
1159  * express those parameters and will be filled by the command-line
1160  * parser.
1161  */
1162 struct drm_cmdline_mode {
1163 	/**
1164 	 * @name:
1165 	 *
1166 	 * Name of the mode.
1167 	 */
1168 	char name[DRM_DISPLAY_MODE_LEN];
1169 
1170 	/**
1171 	 * @specified:
1172 	 *
1173 	 * Has a mode been read from the command-line?
1174 	 */
1175 	bool specified;
1176 
1177 	/**
1178 	 * @refresh_specified:
1179 	 *
1180 	 * Did the mode have a preferred refresh rate?
1181 	 */
1182 	bool refresh_specified;
1183 
1184 	/**
1185 	 * @bpp_specified:
1186 	 *
1187 	 * Did the mode have a preferred BPP?
1188 	 */
1189 	bool bpp_specified;
1190 
1191 	/**
1192 	 * @xres:
1193 	 *
1194 	 * Active resolution on the X axis, in pixels.
1195 	 */
1196 	int xres;
1197 
1198 	/**
1199 	 * @yres:
1200 	 *
1201 	 * Active resolution on the Y axis, in pixels.
1202 	 */
1203 	int yres;
1204 
1205 	/**
1206 	 * @bpp:
1207 	 *
1208 	 * Bits per pixels for the mode.
1209 	 */
1210 	int bpp;
1211 
1212 	/**
1213 	 * @refresh:
1214 	 *
1215 	 * Refresh rate, in Hertz.
1216 	 */
1217 	int refresh;
1218 
1219 	/**
1220 	 * @rb:
1221 	 *
1222 	 * Do we need to use reduced blanking?
1223 	 */
1224 	bool rb;
1225 
1226 	/**
1227 	 * @interlace:
1228 	 *
1229 	 * The mode is interlaced.
1230 	 */
1231 	bool interlace;
1232 
1233 	/**
1234 	 * @cvt:
1235 	 *
1236 	 * The timings will be calculated using the VESA Coordinated
1237 	 * Video Timings instead of looking up the mode from a table.
1238 	 */
1239 	bool cvt;
1240 
1241 	/**
1242 	 * @margins:
1243 	 *
1244 	 * Add margins to the mode calculation (1.8% of xres rounded
1245 	 * down to 8 pixels and 1.8% of yres).
1246 	 */
1247 	bool margins;
1248 
1249 	/**
1250 	 * @force:
1251 	 *
1252 	 * Ignore the hotplug state of the connector, and force its
1253 	 * state to one of the DRM_FORCE_* values.
1254 	 */
1255 	enum drm_connector_force force;
1256 
1257 	/**
1258 	 * @rotation_reflection:
1259 	 *
1260 	 * Initial rotation and reflection of the mode setup from the
1261 	 * command line. See DRM_MODE_ROTATE_* and
1262 	 * DRM_MODE_REFLECT_*. The only rotations supported are
1263 	 * DRM_MODE_ROTATE_0 and DRM_MODE_ROTATE_180.
1264 	 */
1265 	unsigned int rotation_reflection;
1266 
1267 	/**
1268 	 * @panel_orientation:
1269 	 *
1270 	 * drm-connector "panel orientation" property override value,
1271 	 * DRM_MODE_PANEL_ORIENTATION_UNKNOWN if not set.
1272 	 */
1273 	enum drm_panel_orientation panel_orientation;
1274 
1275 	/**
1276 	 * @tv_margins: TV margins to apply to the mode.
1277 	 */
1278 	struct drm_connector_tv_margins tv_margins;
1279 };
1280 
1281 /**
1282  * struct drm_connector - central DRM connector control structure
1283  *
1284  * Each connector may be connected to one or more CRTCs, or may be clonable by
1285  * another connector if they can share a CRTC.  Each connector also has a specific
1286  * position in the broader display (referred to as a 'screen' though it could
1287  * span multiple monitors).
1288  */
1289 struct drm_connector {
1290 	/** @dev: parent DRM device */
1291 	struct drm_device *dev;
1292 	/** @kdev: kernel device for sysfs attributes */
1293 	struct device *kdev;
1294 	/** @attr: sysfs attributes */
1295 	struct device_attribute *attr;
1296 	/**
1297 	 * @fwnode: associated fwnode supplied by platform firmware
1298 	 *
1299 	 * Drivers can set this to associate a fwnode with a connector, drivers
1300 	 * are expected to get a reference on the fwnode when setting this.
1301 	 * drm_connector_cleanup() will call fwnode_handle_put() on this.
1302 	 */
1303 	struct fwnode_handle *fwnode;
1304 
1305 	/**
1306 	 * @head:
1307 	 *
1308 	 * List of all connectors on a @dev, linked from
1309 	 * &drm_mode_config.connector_list. Protected by
1310 	 * &drm_mode_config.connector_list_lock, but please only use
1311 	 * &drm_connector_list_iter to walk this list.
1312 	 */
1313 	struct list_head head;
1314 
1315 	/**
1316 	 * @global_connector_list_entry:
1317 	 *
1318 	 * Connector entry in the global connector-list, used by
1319 	 * drm_connector_find_by_fwnode().
1320 	 */
1321 	struct list_head global_connector_list_entry;
1322 
1323 	/** @base: base KMS object */
1324 	struct drm_mode_object base;
1325 
1326 	/** @name: human readable name, can be overwritten by the driver */
1327 	char *name;
1328 
1329 	/**
1330 	 * @mutex: Lock for general connector state, but currently only protects
1331 	 * @registered. Most of the connector state is still protected by
1332 	 * &drm_mode_config.mutex.
1333 	 */
1334 	struct mutex mutex;
1335 
1336 	/**
1337 	 * @index: Compacted connector index, which matches the position inside
1338 	 * the mode_config.list for drivers not supporting hot-add/removing. Can
1339 	 * be used as an array index. It is invariant over the lifetime of the
1340 	 * connector.
1341 	 */
1342 	unsigned index;
1343 
1344 	/**
1345 	 * @connector_type:
1346 	 * one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
1347 	 */
1348 	int connector_type;
1349 	/** @connector_type_id: index into connector type enum */
1350 	int connector_type_id;
1351 	/**
1352 	 * @interlace_allowed:
1353 	 * Can this connector handle interlaced modes? Only used by
1354 	 * drm_helper_probe_single_connector_modes() for mode filtering.
1355 	 */
1356 	bool interlace_allowed;
1357 	/**
1358 	 * @doublescan_allowed:
1359 	 * Can this connector handle doublescan? Only used by
1360 	 * drm_helper_probe_single_connector_modes() for mode filtering.
1361 	 */
1362 	bool doublescan_allowed;
1363 	/**
1364 	 * @stereo_allowed:
1365 	 * Can this connector handle stereo modes? Only used by
1366 	 * drm_helper_probe_single_connector_modes() for mode filtering.
1367 	 */
1368 	bool stereo_allowed;
1369 
1370 	/**
1371 	 * @ycbcr_420_allowed : This bool indicates if this connector is
1372 	 * capable of handling YCBCR 420 output. While parsing the EDID
1373 	 * blocks it's very helpful to know if the source is capable of
1374 	 * handling YCBCR 420 outputs.
1375 	 */
1376 	bool ycbcr_420_allowed;
1377 
1378 	/**
1379 	 * @registration_state: Is this connector initializing, exposed
1380 	 * (registered) with userspace, or unregistered?
1381 	 *
1382 	 * Protected by @mutex.
1383 	 */
1384 	enum drm_connector_registration_state registration_state;
1385 
1386 	/**
1387 	 * @modes:
1388 	 * Modes available on this connector (from fill_modes() + user).
1389 	 * Protected by &drm_mode_config.mutex.
1390 	 */
1391 	struct list_head modes;
1392 
1393 	/**
1394 	 * @status:
1395 	 * One of the drm_connector_status enums (connected, not, or unknown).
1396 	 * Protected by &drm_mode_config.mutex.
1397 	 */
1398 	enum drm_connector_status status;
1399 
1400 	/**
1401 	 * @probed_modes:
1402 	 * These are modes added by probing with DDC or the BIOS, before
1403 	 * filtering is applied. Used by the probe helpers. Protected by
1404 	 * &drm_mode_config.mutex.
1405 	 */
1406 	struct list_head probed_modes;
1407 
1408 	/**
1409 	 * @display_info: Display information is filled from EDID information
1410 	 * when a display is detected. For non hot-pluggable displays such as
1411 	 * flat panels in embedded systems, the driver should initialize the
1412 	 * &drm_display_info.width_mm and &drm_display_info.height_mm fields
1413 	 * with the physical size of the display.
1414 	 *
1415 	 * Protected by &drm_mode_config.mutex.
1416 	 */
1417 	struct drm_display_info display_info;
1418 
1419 	/** @funcs: connector control functions */
1420 	const struct drm_connector_funcs *funcs;
1421 
1422 	/**
1423 	 * @edid_blob_ptr: DRM property containing EDID if present. Protected by
1424 	 * &drm_mode_config.mutex. This should be updated only by calling
1425 	 * drm_connector_update_edid_property().
1426 	 */
1427 	struct drm_property_blob *edid_blob_ptr;
1428 
1429 	/** @properties: property tracking for this connector */
1430 	struct drm_object_properties properties;
1431 
1432 	/**
1433 	 * @scaling_mode_property: Optional atomic property to control the
1434 	 * upscaling. See drm_connector_attach_content_protection_property().
1435 	 */
1436 	struct drm_property *scaling_mode_property;
1437 
1438 	/**
1439 	 * @vrr_capable_property: Optional property to help userspace
1440 	 * query hardware support for variable refresh rate on a connector.
1441 	 * connector. Drivers can add the property to a connector by
1442 	 * calling drm_connector_attach_vrr_capable_property().
1443 	 *
1444 	 * This should be updated only by calling
1445 	 * drm_connector_set_vrr_capable_property().
1446 	 */
1447 	struct drm_property *vrr_capable_property;
1448 
1449 	/**
1450 	 * @colorspace_property: Connector property to set the suitable
1451 	 * colorspace supported by the sink.
1452 	 */
1453 	struct drm_property *colorspace_property;
1454 
1455 	/**
1456 	 * @path_blob_ptr:
1457 	 *
1458 	 * DRM blob property data for the DP MST path property. This should only
1459 	 * be updated by calling drm_connector_set_path_property().
1460 	 */
1461 	struct drm_property_blob *path_blob_ptr;
1462 
1463 	/**
1464 	 * @max_bpc_property: Default connector property for the max bpc to be
1465 	 * driven out of the connector.
1466 	 */
1467 	struct drm_property *max_bpc_property;
1468 
1469 	/** @privacy_screen: drm_privacy_screen for this connector, or NULL. */
1470 	struct drm_privacy_screen *privacy_screen;
1471 
1472 	/** @privacy_screen_notifier: privacy-screen notifier_block */
1473 	struct notifier_block privacy_screen_notifier;
1474 
1475 	/**
1476 	 * @privacy_screen_sw_state_property: Optional atomic property for the
1477 	 * connector to control the integrated privacy screen.
1478 	 */
1479 	struct drm_property *privacy_screen_sw_state_property;
1480 
1481 	/**
1482 	 * @privacy_screen_hw_state_property: Optional atomic property for the
1483 	 * connector to report the actual integrated privacy screen state.
1484 	 */
1485 	struct drm_property *privacy_screen_hw_state_property;
1486 
1487 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
1488 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
1489 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
1490 
1491 	/**
1492 	 * @polled:
1493 	 *
1494 	 * Connector polling mode, a combination of
1495 	 *
1496 	 * DRM_CONNECTOR_POLL_HPD
1497 	 *     The connector generates hotplug events and doesn't need to be
1498 	 *     periodically polled. The CONNECT and DISCONNECT flags must not
1499 	 *     be set together with the HPD flag.
1500 	 *
1501 	 * DRM_CONNECTOR_POLL_CONNECT
1502 	 *     Periodically poll the connector for connection.
1503 	 *
1504 	 * DRM_CONNECTOR_POLL_DISCONNECT
1505 	 *     Periodically poll the connector for disconnection, without
1506 	 *     causing flickering even when the connector is in use. DACs should
1507 	 *     rarely do this without a lot of testing.
1508 	 *
1509 	 * Set to 0 for connectors that don't support connection status
1510 	 * discovery.
1511 	 */
1512 	uint8_t polled;
1513 
1514 	/**
1515 	 * @dpms: Current dpms state. For legacy drivers the
1516 	 * &drm_connector_funcs.dpms callback must update this. For atomic
1517 	 * drivers, this is handled by the core atomic code, and drivers must
1518 	 * only take &drm_crtc_state.active into account.
1519 	 */
1520 	int dpms;
1521 
1522 	/** @helper_private: mid-layer private data */
1523 	const struct drm_connector_helper_funcs *helper_private;
1524 
1525 	/** @cmdline_mode: mode line parsed from the kernel cmdline for this connector */
1526 	struct drm_cmdline_mode cmdline_mode;
1527 	/** @force: a DRM_FORCE_<foo> state for forced mode sets */
1528 	enum drm_connector_force force;
1529 	/** @override_edid: has the EDID been overwritten through debugfs for testing? */
1530 	bool override_edid;
1531 	/** @epoch_counter: used to detect any other changes in connector, besides status */
1532 	u64 epoch_counter;
1533 
1534 	/**
1535 	 * @possible_encoders: Bit mask of encoders that can drive this
1536 	 * connector, drm_encoder_index() determines the index into the bitfield
1537 	 * and the bits are set with drm_connector_attach_encoder().
1538 	 */
1539 	u32 possible_encoders;
1540 
1541 	/**
1542 	 * @encoder: Currently bound encoder driving this connector, if any.
1543 	 * Only really meaningful for non-atomic drivers. Atomic drivers should
1544 	 * instead look at &drm_connector_state.best_encoder, and in case they
1545 	 * need the CRTC driving this output, &drm_connector_state.crtc.
1546 	 */
1547 	struct drm_encoder *encoder;
1548 
1549 #define MAX_ELD_BYTES	128
1550 	/** @eld: EDID-like data, if present */
1551 	uint8_t eld[MAX_ELD_BYTES];
1552 	/** @latency_present: AV delay info from ELD, if found */
1553 	bool latency_present[2];
1554 	/**
1555 	 * @video_latency: Video latency info from ELD, if found.
1556 	 * [0]: progressive, [1]: interlaced
1557 	 */
1558 	int video_latency[2];
1559 	/**
1560 	 * @audio_latency: audio latency info from ELD, if found
1561 	 * [0]: progressive, [1]: interlaced
1562 	 */
1563 	int audio_latency[2];
1564 
1565 	/**
1566 	 * @ddc: associated ddc adapter.
1567 	 * A connector usually has its associated ddc adapter. If a driver uses
1568 	 * this field, then an appropriate symbolic link is created in connector
1569 	 * sysfs directory to make it easy for the user to tell which i2c
1570 	 * adapter is for a particular display.
1571 	 *
1572 	 * The field should be set by calling drm_connector_init_with_ddc().
1573 	 */
1574 	struct i2c_adapter *ddc;
1575 
1576 	/**
1577 	 * @null_edid_counter: track sinks that give us all zeros for the EDID.
1578 	 * Needed to workaround some HW bugs where we get all 0s
1579 	 */
1580 	int null_edid_counter;
1581 
1582 	/** @bad_edid_counter: track sinks that give us an EDID with invalid checksum */
1583 	unsigned bad_edid_counter;
1584 
1585 	/**
1586 	 * @edid_corrupt: Indicates whether the last read EDID was corrupt. Used
1587 	 * in Displayport compliance testing - Displayport Link CTS Core 1.2
1588 	 * rev1.1 4.2.2.6
1589 	 */
1590 	bool edid_corrupt;
1591 	/**
1592 	 * @real_edid_checksum: real edid checksum for corrupted edid block.
1593 	 * Required in Displayport 1.4 compliance testing
1594 	 * rev1.1 4.2.2.6
1595 	 */
1596 	u8 real_edid_checksum;
1597 
1598 	/** @debugfs_entry: debugfs directory for this connector */
1599 	struct dentry *debugfs_entry;
1600 
1601 	/**
1602 	 * @state:
1603 	 *
1604 	 * Current atomic state for this connector.
1605 	 *
1606 	 * This is protected by &drm_mode_config.connection_mutex. Note that
1607 	 * nonblocking atomic commits access the current connector state without
1608 	 * taking locks. Either by going through the &struct drm_atomic_state
1609 	 * pointers, see for_each_oldnew_connector_in_state(),
1610 	 * for_each_old_connector_in_state() and
1611 	 * for_each_new_connector_in_state(). Or through careful ordering of
1612 	 * atomic commit operations as implemented in the atomic helpers, see
1613 	 * &struct drm_crtc_commit.
1614 	 */
1615 	struct drm_connector_state *state;
1616 
1617 	/* DisplayID bits. FIXME: Extract into a substruct? */
1618 
1619 	/**
1620 	 * @tile_blob_ptr:
1621 	 *
1622 	 * DRM blob property data for the tile property (used mostly by DP MST).
1623 	 * This is meant for screens which are driven through separate display
1624 	 * pipelines represented by &drm_crtc, which might not be running with
1625 	 * genlocked clocks. For tiled panels which are genlocked, like
1626 	 * dual-link LVDS or dual-link DSI, the driver should try to not expose
1627 	 * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
1628 	 *
1629 	 * This should only be updated by calling
1630 	 * drm_connector_set_tile_property().
1631 	 */
1632 	struct drm_property_blob *tile_blob_ptr;
1633 
1634 	/** @has_tile: is this connector connected to a tiled monitor */
1635 	bool has_tile;
1636 	/** @tile_group: tile group for the connected monitor */
1637 	struct drm_tile_group *tile_group;
1638 	/** @tile_is_single_monitor: whether the tile is one monitor housing */
1639 	bool tile_is_single_monitor;
1640 
1641 	/** @num_h_tile: number of horizontal tiles in the tile group */
1642 	/** @num_v_tile: number of vertical tiles in the tile group */
1643 	uint8_t num_h_tile, num_v_tile;
1644 	/** @tile_h_loc: horizontal location of this tile */
1645 	/** @tile_v_loc: vertical location of this tile */
1646 	uint8_t tile_h_loc, tile_v_loc;
1647 	/** @tile_h_size: horizontal size of this tile. */
1648 	/** @tile_v_size: vertical size of this tile. */
1649 	uint16_t tile_h_size, tile_v_size;
1650 
1651 	/**
1652 	 * @free_node:
1653 	 *
1654 	 * List used only by &drm_connector_list_iter to be able to clean up a
1655 	 * connector from any context, in conjunction with
1656 	 * &drm_mode_config.connector_free_work.
1657 	 */
1658 	struct llist_node free_node;
1659 
1660 	/** @hdr_sink_metadata: HDR Metadata Information read from sink */
1661 	struct hdr_sink_metadata hdr_sink_metadata;
1662 };
1663 
1664 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
1665 
1666 int drm_connector_init(struct drm_device *dev,
1667 		       struct drm_connector *connector,
1668 		       const struct drm_connector_funcs *funcs,
1669 		       int connector_type);
1670 int drm_connector_init_with_ddc(struct drm_device *dev,
1671 				struct drm_connector *connector,
1672 				const struct drm_connector_funcs *funcs,
1673 				int connector_type,
1674 				struct i2c_adapter *ddc);
1675 void drm_connector_attach_edid_property(struct drm_connector *connector);
1676 int drm_connector_register(struct drm_connector *connector);
1677 void drm_connector_unregister(struct drm_connector *connector);
1678 int drm_connector_attach_encoder(struct drm_connector *connector,
1679 				      struct drm_encoder *encoder);
1680 
1681 void drm_connector_cleanup(struct drm_connector *connector);
1682 
drm_connector_index(const struct drm_connector * connector)1683 static inline unsigned int drm_connector_index(const struct drm_connector *connector)
1684 {
1685 	return connector->index;
1686 }
1687 
drm_connector_mask(const struct drm_connector * connector)1688 static inline u32 drm_connector_mask(const struct drm_connector *connector)
1689 {
1690 	return 1 << connector->index;
1691 }
1692 
1693 /**
1694  * drm_connector_lookup - lookup connector object
1695  * @dev: DRM device
1696  * @file_priv: drm file to check for lease against.
1697  * @id: connector object id
1698  *
1699  * This function looks up the connector object specified by id
1700  * add takes a reference to it.
1701  */
drm_connector_lookup(struct drm_device * dev,struct drm_file * file_priv,uint32_t id)1702 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
1703 		struct drm_file *file_priv,
1704 		uint32_t id)
1705 {
1706 	struct drm_mode_object *mo;
1707 	mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CONNECTOR);
1708 	return mo ? obj_to_connector(mo) : NULL;
1709 }
1710 
1711 /**
1712  * drm_connector_get - acquire a connector reference
1713  * @connector: DRM connector
1714  *
1715  * This function increments the connector's refcount.
1716  */
drm_connector_get(struct drm_connector * connector)1717 static inline void drm_connector_get(struct drm_connector *connector)
1718 {
1719 	drm_mode_object_get(&connector->base);
1720 }
1721 
1722 /**
1723  * drm_connector_put - release a connector reference
1724  * @connector: DRM connector
1725  *
1726  * This function decrements the connector's reference count and frees the
1727  * object if the reference count drops to zero.
1728  */
drm_connector_put(struct drm_connector * connector)1729 static inline void drm_connector_put(struct drm_connector *connector)
1730 {
1731 	drm_mode_object_put(&connector->base);
1732 }
1733 
1734 /**
1735  * drm_connector_is_unregistered - has the connector been unregistered from
1736  * userspace?
1737  * @connector: DRM connector
1738  *
1739  * Checks whether or not @connector has been unregistered from userspace.
1740  *
1741  * Returns:
1742  * True if the connector was unregistered, false if the connector is
1743  * registered or has not yet been registered with userspace.
1744  */
1745 static inline bool
drm_connector_is_unregistered(struct drm_connector * connector)1746 drm_connector_is_unregistered(struct drm_connector *connector)
1747 {
1748 	return READ_ONCE(connector->registration_state) ==
1749 		DRM_CONNECTOR_UNREGISTERED;
1750 }
1751 
1752 void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode);
1753 const char *drm_get_connector_type_name(unsigned int connector_type);
1754 const char *drm_get_connector_status_name(enum drm_connector_status status);
1755 const char *drm_get_subpixel_order_name(enum subpixel_order order);
1756 const char *drm_get_dpms_name(int val);
1757 const char *drm_get_dvi_i_subconnector_name(int val);
1758 const char *drm_get_dvi_i_select_name(int val);
1759 const char *drm_get_tv_subconnector_name(int val);
1760 const char *drm_get_tv_select_name(int val);
1761 const char *drm_get_dp_subconnector_name(int val);
1762 const char *drm_get_content_protection_name(int val);
1763 const char *drm_get_hdcp_content_type_name(int val);
1764 
1765 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
1766 void drm_connector_attach_dp_subconnector_property(struct drm_connector *connector);
1767 
1768 int drm_mode_create_tv_margin_properties(struct drm_device *dev);
1769 int drm_mode_create_tv_properties(struct drm_device *dev,
1770 				  unsigned int num_modes,
1771 				  const char * const modes[]);
1772 void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
1773 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
1774 int drm_connector_attach_content_type_property(struct drm_connector *dev);
1775 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1776 					       u32 scaling_mode_mask);
1777 int drm_connector_attach_vrr_capable_property(
1778 		struct drm_connector *connector);
1779 int drm_connector_attach_colorspace_property(struct drm_connector *connector);
1780 int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector);
1781 bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
1782 					     struct drm_connector_state *new_state);
1783 int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
1784 int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector);
1785 int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);
1786 int drm_mode_create_content_type_property(struct drm_device *dev);
1787 int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
1788 
1789 int drm_connector_set_path_property(struct drm_connector *connector,
1790 				    const char *path);
1791 int drm_connector_set_tile_property(struct drm_connector *connector);
1792 int drm_connector_update_edid_property(struct drm_connector *connector,
1793 				       const struct edid *edid);
1794 void drm_connector_set_link_status_property(struct drm_connector *connector,
1795 					    uint64_t link_status);
1796 void drm_connector_set_vrr_capable_property(
1797 		struct drm_connector *connector, bool capable);
1798 int drm_connector_set_panel_orientation(
1799 	struct drm_connector *connector,
1800 	enum drm_panel_orientation panel_orientation);
1801 int drm_connector_set_panel_orientation_with_quirk(
1802 	struct drm_connector *connector,
1803 	enum drm_panel_orientation panel_orientation,
1804 	int width, int height);
1805 int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
1806 					  int min, int max);
1807 void drm_connector_create_privacy_screen_properties(struct drm_connector *conn);
1808 void drm_connector_attach_privacy_screen_properties(struct drm_connector *conn);
1809 void drm_connector_attach_privacy_screen_provider(
1810 	struct drm_connector *connector, struct drm_privacy_screen *priv);
1811 void drm_connector_update_privacy_screen(const struct drm_connector_state *connector_state);
1812 
1813 /**
1814  * struct drm_tile_group - Tile group metadata
1815  * @refcount: reference count
1816  * @dev: DRM device
1817  * @id: tile group id exposed to userspace
1818  * @group_data: Sink-private data identifying this group
1819  *
1820  * @group_data corresponds to displayid vend/prod/serial for external screens
1821  * with an EDID.
1822  */
1823 struct drm_tile_group {
1824 	struct kref refcount;
1825 	struct drm_device *dev;
1826 	int id;
1827 	u8 group_data[8];
1828 };
1829 
1830 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1831 						  const char topology[8]);
1832 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1833 					       const char topology[8]);
1834 void drm_mode_put_tile_group(struct drm_device *dev,
1835 			     struct drm_tile_group *tg);
1836 
1837 /**
1838  * struct drm_connector_list_iter - connector_list iterator
1839  *
1840  * This iterator tracks state needed to be able to walk the connector_list
1841  * within struct drm_mode_config. Only use together with
1842  * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and
1843  * drm_connector_list_iter_next() respectively the convenience macro
1844  * drm_for_each_connector_iter().
1845  *
1846  * Note that the return value of drm_connector_list_iter_next() is only valid
1847  * up to the next drm_connector_list_iter_next() or
1848  * drm_connector_list_iter_end() call. If you want to use the connector later,
1849  * then you need to grab your own reference first using drm_connector_get().
1850  */
1851 struct drm_connector_list_iter {
1852 /* private: */
1853 	struct drm_device *dev;
1854 	struct drm_connector *conn;
1855 };
1856 
1857 void drm_connector_list_iter_begin(struct drm_device *dev,
1858 				   struct drm_connector_list_iter *iter);
1859 struct drm_connector *
1860 drm_connector_list_iter_next(struct drm_connector_list_iter *iter);
1861 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
1862 
1863 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
1864 					struct drm_encoder *encoder);
1865 
1866 /**
1867  * drm_for_each_connector_iter - connector_list iterator macro
1868  * @connector: &struct drm_connector pointer used as cursor
1869  * @iter: &struct drm_connector_list_iter
1870  *
1871  * Note that @connector is only valid within the list body, if you want to use
1872  * @connector after calling drm_connector_list_iter_end() then you need to grab
1873  * your own reference first using drm_connector_get().
1874  */
1875 #define drm_for_each_connector_iter(connector, iter) \
1876 	while ((connector = drm_connector_list_iter_next(iter)))
1877 
1878 /**
1879  * drm_connector_for_each_possible_encoder - iterate connector's possible encoders
1880  * @connector: &struct drm_connector pointer
1881  * @encoder: &struct drm_encoder pointer used as cursor
1882  */
1883 #define drm_connector_for_each_possible_encoder(connector, encoder) \
1884 	drm_for_each_encoder_mask(encoder, (connector)->dev, \
1885 				  (connector)->possible_encoders)
1886 
1887 #endif
1888