blob: 919933d1beb42241e233e9332a99911eeaa4c9cd [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
2 * Copyright © 2007-2008 Intel Corporation
3 * Jesse Barnes <jesse.barnes@intel.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 */
23#ifndef __DRM_EDID_H__
24#define __DRM_EDID_H__
25
26#include <linux/types.h>
27
28#define EDID_LENGTH 128
29#define DDC_ADDR 0x50
Dave Airlieb49b55b2014-10-20 16:13:19 +100030#define DDC_ADDR2 0x52 /* E-DDC 1.2 - where DisplayID can hide */
Dave Airlief453ba02008-11-07 14:05:41 -080031
Adam Jackson4d76a222010-08-03 14:38:17 -040032#define CEA_EXT 0x02
33#define VTB_EXT 0x10
34#define DI_EXT 0x40
35#define LS_EXT 0x50
36#define MI_EXT 0x60
Dave Airlieb49b55b2014-10-20 16:13:19 +100037#define DISPLAYID_EXT 0x70
Adam Jackson4d76a222010-08-03 14:38:17 -040038
Dave Airlief453ba02008-11-07 14:05:41 -080039struct est_timings {
40 u8 t1;
41 u8 t2;
42 u8 mfg_rsvd;
43} __attribute__((packed));
44
Michel Dänzer0454bea2009-06-15 16:56:07 +020045/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
Michel Dänzere14cbee2009-06-23 12:36:32 +020046#define EDID_TIMING_ASPECT_SHIFT 6
Michel Dänzer0454bea2009-06-15 16:56:07 +020047#define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
48
49/* need to add 60 */
Michel Dänzere14cbee2009-06-23 12:36:32 +020050#define EDID_TIMING_VFREQ_SHIFT 0
Michel Dänzer0454bea2009-06-15 16:56:07 +020051#define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT)
52
Dave Airlief453ba02008-11-07 14:05:41 -080053struct std_timing {
54 u8 hsize; /* need to multiply by 8 then add 248 */
Michel Dänzer0454bea2009-06-15 16:56:07 +020055 u8 vfreq_aspect;
Dave Airlief453ba02008-11-07 14:05:41 -080056} __attribute__((packed));
57
Michel Dänzere14cbee2009-06-23 12:36:32 +020058#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
59#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
Michel Dänzer0454bea2009-06-15 16:56:07 +020060#define DRM_EDID_PT_SEPARATE_SYNC (3 << 3)
Michel Dänzere14cbee2009-06-23 12:36:32 +020061#define DRM_EDID_PT_STEREO (1 << 5)
62#define DRM_EDID_PT_INTERLACED (1 << 7)
Michel Dänzer0454bea2009-06-15 16:56:07 +020063
Dave Airlief453ba02008-11-07 14:05:41 -080064/* If detailed data is pixel timing */
65struct detailed_pixel_timing {
66 u8 hactive_lo;
67 u8 hblank_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020068 u8 hactive_hblank_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080069 u8 vactive_lo;
70 u8 vblank_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020071 u8 vactive_vblank_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080072 u8 hsync_offset_lo;
73 u8 hsync_pulse_width_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020074 u8 vsync_offset_pulse_width_lo;
75 u8 hsync_vsync_offset_pulse_width_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080076 u8 width_mm_lo;
77 u8 height_mm_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020078 u8 width_height_mm_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080079 u8 hborder;
80 u8 vborder;
Michel Dänzer0454bea2009-06-15 16:56:07 +020081 u8 misc;
Dave Airlief453ba02008-11-07 14:05:41 -080082} __attribute__((packed));
83
84/* If it's not pixel timing, it'll be one of the below */
85struct detailed_data_string {
86 u8 str[13];
87} __attribute__((packed));
88
89struct detailed_data_monitor_range {
90 u8 min_vfreq;
91 u8 max_vfreq;
92 u8 min_hfreq_khz;
93 u8 max_hfreq_khz;
94 u8 pixel_clock_mhz; /* need to multiply by 10 */
Adam Jacksoneeefa4b2012-04-13 16:33:37 -040095 u8 flags;
96 union {
97 struct {
98 u8 reserved;
99 u8 hfreq_start_khz; /* need to multiply by 2 */
100 u8 c; /* need to divide by 2 */
101 __le16 m;
102 u8 k;
103 u8 j; /* need to divide by 2 */
Takashi Iwai8353e6c2012-04-23 17:40:49 +0100104 } __attribute__((packed)) gtf2;
Adam Jacksoneeefa4b2012-04-13 16:33:37 -0400105 struct {
106 u8 version;
107 u8 data1; /* high 6 bits: extra clock resolution */
108 u8 data2; /* plus low 2 of above: max hactive */
109 u8 supported_aspects;
110 u8 flags; /* preferred aspect and blanking support */
111 u8 supported_scalings;
112 u8 preferred_refresh;
Takashi Iwai8353e6c2012-04-23 17:40:49 +0100113 } __attribute__((packed)) cvt;
Adam Jacksoneeefa4b2012-04-13 16:33:37 -0400114 } formula;
Dave Airlief453ba02008-11-07 14:05:41 -0800115} __attribute__((packed));
116
117struct detailed_data_wpindex {
Michel Dänzere14cbee2009-06-23 12:36:32 +0200118 u8 white_yx_lo; /* Lower 2 bits each */
Dave Airlief453ba02008-11-07 14:05:41 -0800119 u8 white_x_hi;
120 u8 white_y_hi;
121 u8 gamma; /* need to divide by 100 then add 1 */
122} __attribute__((packed));
123
124struct detailed_data_color_point {
125 u8 windex1;
126 u8 wpindex1[3];
127 u8 windex2;
128 u8 wpindex2[3];
129} __attribute__((packed));
130
Adam Jackson9340d8c2009-12-03 17:44:40 -0500131struct cvt_timing {
132 u8 code[3];
133} __attribute__((packed));
134
Dave Airlief453ba02008-11-07 14:05:41 -0800135struct detailed_non_pixel {
136 u8 pad1;
137 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
138 fb=color point data, fa=standard timing data,
139 f9=undefined, f8=mfg. reserved */
140 u8 pad2;
141 union {
142 struct detailed_data_string str;
143 struct detailed_data_monitor_range range;
144 struct detailed_data_wpindex color;
Dan Carpenter96525a22010-05-14 13:06:19 +0200145 struct std_timing timings[6];
Adam Jackson9340d8c2009-12-03 17:44:40 -0500146 struct cvt_timing cvt[4];
Dave Airlief453ba02008-11-07 14:05:41 -0800147 } data;
148} __attribute__((packed));
149
Adam Jackson2dbdc522009-12-03 17:44:39 -0500150#define EDID_DETAIL_EST_TIMINGS 0xf7
151#define EDID_DETAIL_CVT_3BYTE 0xf8
152#define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
Dave Airlief453ba02008-11-07 14:05:41 -0800153#define EDID_DETAIL_STD_MODES 0xfa
154#define EDID_DETAIL_MONITOR_CPDATA 0xfb
155#define EDID_DETAIL_MONITOR_NAME 0xfc
156#define EDID_DETAIL_MONITOR_RANGE 0xfd
157#define EDID_DETAIL_MONITOR_STRING 0xfe
158#define EDID_DETAIL_MONITOR_SERIAL 0xff
159
160struct detailed_timing {
Michel Dänzer0454bea2009-06-15 16:56:07 +0200161 __le16 pixel_clock; /* need to multiply by 10 KHz */
Dave Airlief453ba02008-11-07 14:05:41 -0800162 union {
163 struct detailed_pixel_timing pixel_data;
164 struct detailed_non_pixel other_data;
165 } data;
166} __attribute__((packed));
167
Michel Dänzere14cbee2009-06-23 12:36:32 +0200168#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
169#define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
170#define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2)
Michel Dänzer0454bea2009-06-15 16:56:07 +0200171#define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3)
Michel Dänzere14cbee2009-06-23 12:36:32 +0200172#define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4)
173#define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5)
Jesse Barnes3b112282011-04-15 12:49:23 -0700174#define DRM_EDID_INPUT_DIGITAL (1 << 7)
175#define DRM_EDID_DIGITAL_DEPTH_MASK (7 << 4)
176#define DRM_EDID_DIGITAL_DEPTH_UNDEF (0 << 4)
177#define DRM_EDID_DIGITAL_DEPTH_6 (1 << 4)
178#define DRM_EDID_DIGITAL_DEPTH_8 (2 << 4)
179#define DRM_EDID_DIGITAL_DEPTH_10 (3 << 4)
180#define DRM_EDID_DIGITAL_DEPTH_12 (4 << 4)
181#define DRM_EDID_DIGITAL_DEPTH_14 (5 << 4)
182#define DRM_EDID_DIGITAL_DEPTH_16 (6 << 4)
183#define DRM_EDID_DIGITAL_DEPTH_RSVD (7 << 4)
184#define DRM_EDID_DIGITAL_TYPE_UNDEF (0)
185#define DRM_EDID_DIGITAL_TYPE_DVI (1)
186#define DRM_EDID_DIGITAL_TYPE_HDMI_A (2)
187#define DRM_EDID_DIGITAL_TYPE_HDMI_B (3)
188#define DRM_EDID_DIGITAL_TYPE_MDDI (4)
189#define DRM_EDID_DIGITAL_TYPE_DP (5)
Michel Dänzer0454bea2009-06-15 16:56:07 +0200190
Michel Dänzere14cbee2009-06-23 12:36:32 +0200191#define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0)
192#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
193#define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
Jesse Barnesda05a5a72011-04-15 13:48:57 -0700194/* If analog */
Michel Dänzer0454bea2009-06-15 16:56:07 +0200195#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
Jesse Barnesda05a5a72011-04-15 13:48:57 -0700196/* If digital */
197#define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
198#define DRM_EDID_FEATURE_RGB (0 << 3)
199#define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
200#define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
201#define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
202
Michel Dänzere14cbee2009-06-23 12:36:32 +0200203#define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
204#define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
205#define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
Michel Dänzer0454bea2009-06-15 16:56:07 +0200206
Mario Kleinerd0c94692014-03-27 19:59:39 +0100207#define DRM_EDID_HDMI_DC_48 (1 << 6)
208#define DRM_EDID_HDMI_DC_36 (1 << 5)
209#define DRM_EDID_HDMI_DC_30 (1 << 4)
210#define DRM_EDID_HDMI_DC_Y444 (1 << 3)
211
Jani Nikulababc9492014-10-28 16:20:47 +0200212/* ELD Header Block */
213#define DRM_ELD_HEADER_BLOCK_SIZE 4
214
215#define DRM_ELD_VER 0
216# define DRM_ELD_VER_SHIFT 3
217# define DRM_ELD_VER_MASK (0x1f << 3)
Jani Nikula1b54bdb2015-04-13 10:57:14 +0300218# define DRM_ELD_VER_CEA861D (2 << 3) /* supports 861D or below */
219# define DRM_ELD_VER_CANNED (0x1f << 3)
Jani Nikulababc9492014-10-28 16:20:47 +0200220
221#define DRM_ELD_BASELINE_ELD_LEN 2 /* in dwords! */
222
223/* ELD Baseline Block for ELD_Ver == 2 */
224#define DRM_ELD_CEA_EDID_VER_MNL 4
225# define DRM_ELD_CEA_EDID_VER_SHIFT 5
226# define DRM_ELD_CEA_EDID_VER_MASK (7 << 5)
227# define DRM_ELD_CEA_EDID_VER_NONE (0 << 5)
228# define DRM_ELD_CEA_EDID_VER_CEA861 (1 << 5)
229# define DRM_ELD_CEA_EDID_VER_CEA861A (2 << 5)
230# define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
231# define DRM_ELD_MNL_SHIFT 0
232# define DRM_ELD_MNL_MASK (0x1f << 0)
233
234#define DRM_ELD_SAD_COUNT_CONN_TYPE 5
235# define DRM_ELD_SAD_COUNT_SHIFT 4
236# define DRM_ELD_SAD_COUNT_MASK (0xf << 4)
237# define DRM_ELD_CONN_TYPE_SHIFT 2
238# define DRM_ELD_CONN_TYPE_MASK (3 << 2)
239# define DRM_ELD_CONN_TYPE_HDMI (0 << 2)
240# define DRM_ELD_CONN_TYPE_DP (1 << 2)
241# define DRM_ELD_SUPPORTS_AI (1 << 1)
242# define DRM_ELD_SUPPORTS_HDCP (1 << 0)
243
244#define DRM_ELD_AUD_SYNCH_DELAY 6 /* in units of 2 ms */
245# define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */
246
247#define DRM_ELD_SPEAKER 7
248# define DRM_ELD_SPEAKER_RLRC (1 << 6)
249# define DRM_ELD_SPEAKER_FLRC (1 << 5)
250# define DRM_ELD_SPEAKER_RC (1 << 4)
251# define DRM_ELD_SPEAKER_RLR (1 << 3)
252# define DRM_ELD_SPEAKER_FC (1 << 2)
253# define DRM_ELD_SPEAKER_LFE (1 << 1)
254# define DRM_ELD_SPEAKER_FLR (1 << 0)
255
256#define DRM_ELD_PORT_ID 8 /* offsets 8..15 inclusive */
257# define DRM_ELD_PORT_ID_LEN 8
258
259#define DRM_ELD_MANUFACTURER_NAME0 16
260#define DRM_ELD_MANUFACTURER_NAME1 17
261
262#define DRM_ELD_PRODUCT_CODE0 18
263#define DRM_ELD_PRODUCT_CODE1 19
264
265#define DRM_ELD_MONITOR_NAME_STRING 20 /* offsets 20..(20+mnl-1) inclusive */
266
267#define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad))
268
Dave Airlief453ba02008-11-07 14:05:41 -0800269struct edid {
270 u8 header[8];
271 /* Vendor & product info */
272 u8 mfg_id[2];
273 u8 prod_code[2];
274 u32 serial; /* FIXME: byte order */
275 u8 mfg_week;
276 u8 mfg_year;
277 /* EDID version */
278 u8 version;
279 u8 revision;
280 /* Display info: */
Michel Dänzer0454bea2009-06-15 16:56:07 +0200281 u8 input;
Dave Airlief453ba02008-11-07 14:05:41 -0800282 u8 width_cm;
283 u8 height_cm;
284 u8 gamma;
Michel Dänzer0454bea2009-06-15 16:56:07 +0200285 u8 features;
Dave Airlief453ba02008-11-07 14:05:41 -0800286 /* Color characteristics */
287 u8 red_green_lo;
288 u8 black_white_lo;
289 u8 red_x;
290 u8 red_y;
291 u8 green_x;
292 u8 green_y;
293 u8 blue_x;
294 u8 blue_y;
295 u8 white_x;
296 u8 white_y;
297 /* Est. timings and mfg rsvd timings*/
298 struct est_timings established_timings;
299 /* Standard timings 1-8*/
300 struct std_timing standard_timings[8];
301 /* Detailing timings 1-4 */
302 struct detailed_timing detailed_timings[4];
303 /* Number of 128 byte ext. blocks */
304 u8 extensions;
305 /* Checksum */
306 u8 checksum;
307} __attribute__((packed));
308
Dave Airlief453ba02008-11-07 14:05:41 -0800309#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
310
Rafał Miłeckife214162013-04-19 19:01:25 +0200311/* Short Audio Descriptor */
312struct cea_sad {
313 u8 format;
314 u8 channels; /* max number of channels - 1 */
315 u8 freq;
316 u8 byte2; /* meaning depends on format */
317};
318
Wu Fengguang76adaa342011-09-05 14:23:20 +0800319struct drm_encoder;
320struct drm_connector;
321struct drm_display_mode;
Thierry Reding10a85122012-11-21 15:31:35 +0100322struct hdmi_avi_infoframe;
Lespiau, Damien83dd0002013-08-19 16:59:03 +0100323struct hdmi_vendor_infoframe;
Thierry Reding10a85122012-11-21 15:31:35 +0100324
Wu Fengguang76adaa342011-09-05 14:23:20 +0800325void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid);
Rafał Miłeckife214162013-04-19 19:01:25 +0200326int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
Alex Deucherd105f472013-07-25 15:55:32 -0400327int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
Wu Fengguang76adaa342011-09-05 14:23:20 +0800328int drm_av_sync_delay(struct drm_connector *connector,
Ville Syrjälä3a818d32015-09-07 18:22:58 +0300329 const struct drm_display_mode *mode);
Ville Syrjälä9e5a3b52015-09-07 18:22:57 +0300330struct drm_connector *drm_select_eld(struct drm_encoder *encoder);
Ezequiel Garciaba34d582016-04-19 14:40:37 -0300331
332#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
Carsten Emdeda0df922012-03-18 22:37:33 +0100333int drm_load_edid_firmware(struct drm_connector *connector);
Ezequiel Garciaba34d582016-04-19 14:40:37 -0300334#else
335static inline int drm_load_edid_firmware(struct drm_connector *connector)
336{
337 return 0;
338}
339#endif
Wu Fengguang76adaa342011-09-05 14:23:20 +0800340
Thierry Reding10a85122012-11-21 15:31:35 +0100341int
342drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
343 const struct drm_display_mode *mode);
Lespiau, Damien83dd0002013-08-19 16:59:03 +0100344int
345drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
346 const struct drm_display_mode *mode);
Thierry Reding10a85122012-11-21 15:31:35 +0100347
Jani Nikulababc9492014-10-28 16:20:47 +0200348/**
349 * drm_eld_mnl - Get ELD monitor name length in bytes.
350 * @eld: pointer to an eld memory structure with mnl set
351 */
352static inline int drm_eld_mnl(const uint8_t *eld)
353{
354 return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
355}
356
357/**
Russell King1c73d3b2015-03-28 18:13:52 +0000358 * drm_eld_sad - Get ELD SAD structures.
359 * @eld: pointer to an eld memory structure with sad_count set
360 */
361static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
362{
363 unsigned int ver, mnl;
364
365 ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
366 if (ver != 2 && ver != 31)
367 return NULL;
368
369 mnl = drm_eld_mnl(eld);
370 if (mnl > 16)
371 return NULL;
372
373 return eld + DRM_ELD_CEA_SAD(mnl, 0);
374}
375
376/**
Jani Nikulababc9492014-10-28 16:20:47 +0200377 * drm_eld_sad_count - Get ELD SAD count.
378 * @eld: pointer to an eld memory structure with sad_count set
379 */
380static inline int drm_eld_sad_count(const uint8_t *eld)
381{
382 return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
383 DRM_ELD_SAD_COUNT_SHIFT;
384}
385
386/**
387 * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
388 * @eld: pointer to an eld memory structure with mnl and sad_count set
389 *
390 * This is a helper for determining the payload size of the baseline block, in
391 * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
392 */
393static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
394{
395 return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
396 drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
397}
398
399/**
400 * drm_eld_size - Get ELD size in bytes
401 * @eld: pointer to a complete eld memory structure
402 *
403 * The returned value does not include the vendor block. It's vendor specific,
404 * and comprises of the remaining bytes in the ELD memory buffer after
405 * drm_eld_size() bytes of header and baseline block.
406 *
407 * The returned value is guaranteed to be a multiple of 4.
408 */
409static inline int drm_eld_size(const uint8_t *eld)
410{
411 return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
412}
413
Subhransu S. Prusty1aa8ec22016-02-12 07:46:08 +0530414/**
415 * drm_eld_get_conn_type - Get device type hdmi/dp connected
416 * @eld: pointer to an ELD memory structure
417 *
418 * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
419 * identify the display type connected.
420 */
421static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
422{
423 return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
424}
425
Lars-Peter Clausen18df89f2012-04-27 11:11:58 +0200426struct edid *drm_do_get_edid(struct drm_connector *connector,
427 int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
428 size_t len),
429 void *data);
430
Dave Airlief453ba02008-11-07 14:05:41 -0800431#endif /* __DRM_EDID_H__ */