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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
30
Adam Jackson4d76a222010-08-03 14:38:17 -040031#define CEA_EXT 0x02
32#define VTB_EXT 0x10
33#define DI_EXT 0x40
34#define LS_EXT 0x50
35#define MI_EXT 0x60
36
Dave Airlief453ba02008-11-07 14:05:41 -080037struct est_timings {
38 u8 t1;
39 u8 t2;
40 u8 mfg_rsvd;
41} __attribute__((packed));
42
Michel Dänzer0454bea2009-06-15 16:56:07 +020043/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
Michel Dänzere14cbee2009-06-23 12:36:32 +020044#define EDID_TIMING_ASPECT_SHIFT 6
Michel Dänzer0454bea2009-06-15 16:56:07 +020045#define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
46
47/* need to add 60 */
Michel Dänzere14cbee2009-06-23 12:36:32 +020048#define EDID_TIMING_VFREQ_SHIFT 0
Michel Dänzer0454bea2009-06-15 16:56:07 +020049#define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT)
50
Dave Airlief453ba02008-11-07 14:05:41 -080051struct std_timing {
52 u8 hsize; /* need to multiply by 8 then add 248 */
Michel Dänzer0454bea2009-06-15 16:56:07 +020053 u8 vfreq_aspect;
Dave Airlief453ba02008-11-07 14:05:41 -080054} __attribute__((packed));
55
Michel Dänzere14cbee2009-06-23 12:36:32 +020056#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
57#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
Michel Dänzer0454bea2009-06-15 16:56:07 +020058#define DRM_EDID_PT_SEPARATE_SYNC (3 << 3)
Michel Dänzere14cbee2009-06-23 12:36:32 +020059#define DRM_EDID_PT_STEREO (1 << 5)
60#define DRM_EDID_PT_INTERLACED (1 << 7)
Michel Dänzer0454bea2009-06-15 16:56:07 +020061
Dave Airlief453ba02008-11-07 14:05:41 -080062/* If detailed data is pixel timing */
63struct detailed_pixel_timing {
64 u8 hactive_lo;
65 u8 hblank_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020066 u8 hactive_hblank_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080067 u8 vactive_lo;
68 u8 vblank_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020069 u8 vactive_vblank_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080070 u8 hsync_offset_lo;
71 u8 hsync_pulse_width_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020072 u8 vsync_offset_pulse_width_lo;
73 u8 hsync_vsync_offset_pulse_width_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080074 u8 width_mm_lo;
75 u8 height_mm_lo;
Michel Dänzer0454bea2009-06-15 16:56:07 +020076 u8 width_height_mm_hi;
Dave Airlief453ba02008-11-07 14:05:41 -080077 u8 hborder;
78 u8 vborder;
Michel Dänzer0454bea2009-06-15 16:56:07 +020079 u8 misc;
Dave Airlief453ba02008-11-07 14:05:41 -080080} __attribute__((packed));
81
82/* If it's not pixel timing, it'll be one of the below */
83struct detailed_data_string {
84 u8 str[13];
85} __attribute__((packed));
86
87struct detailed_data_monitor_range {
88 u8 min_vfreq;
89 u8 max_vfreq;
90 u8 min_hfreq_khz;
91 u8 max_hfreq_khz;
92 u8 pixel_clock_mhz; /* need to multiply by 10 */
Adam Jacksoneeefa4b2012-04-13 16:33:37 -040093 u8 flags;
94 union {
95 struct {
96 u8 reserved;
97 u8 hfreq_start_khz; /* need to multiply by 2 */
98 u8 c; /* need to divide by 2 */
99 __le16 m;
100 u8 k;
101 u8 j; /* need to divide by 2 */
Takashi Iwai8353e6c2012-04-23 17:40:49 +0100102 } __attribute__((packed)) gtf2;
Adam Jacksoneeefa4b2012-04-13 16:33:37 -0400103 struct {
104 u8 version;
105 u8 data1; /* high 6 bits: extra clock resolution */
106 u8 data2; /* plus low 2 of above: max hactive */
107 u8 supported_aspects;
108 u8 flags; /* preferred aspect and blanking support */
109 u8 supported_scalings;
110 u8 preferred_refresh;
Takashi Iwai8353e6c2012-04-23 17:40:49 +0100111 } __attribute__((packed)) cvt;
Adam Jacksoneeefa4b2012-04-13 16:33:37 -0400112 } formula;
Dave Airlief453ba02008-11-07 14:05:41 -0800113} __attribute__((packed));
114
115struct detailed_data_wpindex {
Michel Dänzere14cbee2009-06-23 12:36:32 +0200116 u8 white_yx_lo; /* Lower 2 bits each */
Dave Airlief453ba02008-11-07 14:05:41 -0800117 u8 white_x_hi;
118 u8 white_y_hi;
119 u8 gamma; /* need to divide by 100 then add 1 */
120} __attribute__((packed));
121
122struct detailed_data_color_point {
123 u8 windex1;
124 u8 wpindex1[3];
125 u8 windex2;
126 u8 wpindex2[3];
127} __attribute__((packed));
128
Adam Jackson9340d8c2009-12-03 17:44:40 -0500129struct cvt_timing {
130 u8 code[3];
131} __attribute__((packed));
132
Dave Airlief453ba02008-11-07 14:05:41 -0800133struct detailed_non_pixel {
134 u8 pad1;
135 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
136 fb=color point data, fa=standard timing data,
137 f9=undefined, f8=mfg. reserved */
138 u8 pad2;
139 union {
140 struct detailed_data_string str;
141 struct detailed_data_monitor_range range;
142 struct detailed_data_wpindex color;
Dan Carpenter96525a22010-05-14 13:06:19 +0200143 struct std_timing timings[6];
Adam Jackson9340d8c2009-12-03 17:44:40 -0500144 struct cvt_timing cvt[4];
Dave Airlief453ba02008-11-07 14:05:41 -0800145 } data;
146} __attribute__((packed));
147
Adam Jackson2dbdc522009-12-03 17:44:39 -0500148#define EDID_DETAIL_EST_TIMINGS 0xf7
149#define EDID_DETAIL_CVT_3BYTE 0xf8
150#define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
Dave Airlief453ba02008-11-07 14:05:41 -0800151#define EDID_DETAIL_STD_MODES 0xfa
152#define EDID_DETAIL_MONITOR_CPDATA 0xfb
153#define EDID_DETAIL_MONITOR_NAME 0xfc
154#define EDID_DETAIL_MONITOR_RANGE 0xfd
155#define EDID_DETAIL_MONITOR_STRING 0xfe
156#define EDID_DETAIL_MONITOR_SERIAL 0xff
157
158struct detailed_timing {
Michel Dänzer0454bea2009-06-15 16:56:07 +0200159 __le16 pixel_clock; /* need to multiply by 10 KHz */
Dave Airlief453ba02008-11-07 14:05:41 -0800160 union {
161 struct detailed_pixel_timing pixel_data;
162 struct detailed_non_pixel other_data;
163 } data;
164} __attribute__((packed));
165
Michel Dänzere14cbee2009-06-23 12:36:32 +0200166#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
167#define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
168#define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2)
Michel Dänzer0454bea2009-06-15 16:56:07 +0200169#define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3)
Michel Dänzere14cbee2009-06-23 12:36:32 +0200170#define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4)
171#define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5)
Jesse Barnes3b112282011-04-15 12:49:23 -0700172#define DRM_EDID_INPUT_DIGITAL (1 << 7)
173#define DRM_EDID_DIGITAL_DEPTH_MASK (7 << 4)
174#define DRM_EDID_DIGITAL_DEPTH_UNDEF (0 << 4)
175#define DRM_EDID_DIGITAL_DEPTH_6 (1 << 4)
176#define DRM_EDID_DIGITAL_DEPTH_8 (2 << 4)
177#define DRM_EDID_DIGITAL_DEPTH_10 (3 << 4)
178#define DRM_EDID_DIGITAL_DEPTH_12 (4 << 4)
179#define DRM_EDID_DIGITAL_DEPTH_14 (5 << 4)
180#define DRM_EDID_DIGITAL_DEPTH_16 (6 << 4)
181#define DRM_EDID_DIGITAL_DEPTH_RSVD (7 << 4)
182#define DRM_EDID_DIGITAL_TYPE_UNDEF (0)
183#define DRM_EDID_DIGITAL_TYPE_DVI (1)
184#define DRM_EDID_DIGITAL_TYPE_HDMI_A (2)
185#define DRM_EDID_DIGITAL_TYPE_HDMI_B (3)
186#define DRM_EDID_DIGITAL_TYPE_MDDI (4)
187#define DRM_EDID_DIGITAL_TYPE_DP (5)
Michel Dänzer0454bea2009-06-15 16:56:07 +0200188
Michel Dänzere14cbee2009-06-23 12:36:32 +0200189#define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0)
190#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
191#define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
Jesse Barnesda05a5a72011-04-15 13:48:57 -0700192/* If analog */
Michel Dänzer0454bea2009-06-15 16:56:07 +0200193#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
Jesse Barnesda05a5a72011-04-15 13:48:57 -0700194/* If digital */
195#define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
196#define DRM_EDID_FEATURE_RGB (0 << 3)
197#define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
198#define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
199#define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
200
Michel Dänzere14cbee2009-06-23 12:36:32 +0200201#define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
202#define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
203#define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
Michel Dänzer0454bea2009-06-15 16:56:07 +0200204
Dave Airlief453ba02008-11-07 14:05:41 -0800205struct edid {
206 u8 header[8];
207 /* Vendor & product info */
208 u8 mfg_id[2];
209 u8 prod_code[2];
210 u32 serial; /* FIXME: byte order */
211 u8 mfg_week;
212 u8 mfg_year;
213 /* EDID version */
214 u8 version;
215 u8 revision;
216 /* Display info: */
Michel Dänzer0454bea2009-06-15 16:56:07 +0200217 u8 input;
Dave Airlief453ba02008-11-07 14:05:41 -0800218 u8 width_cm;
219 u8 height_cm;
220 u8 gamma;
Michel Dänzer0454bea2009-06-15 16:56:07 +0200221 u8 features;
Dave Airlief453ba02008-11-07 14:05:41 -0800222 /* Color characteristics */
223 u8 red_green_lo;
224 u8 black_white_lo;
225 u8 red_x;
226 u8 red_y;
227 u8 green_x;
228 u8 green_y;
229 u8 blue_x;
230 u8 blue_y;
231 u8 white_x;
232 u8 white_y;
233 /* Est. timings and mfg rsvd timings*/
234 struct est_timings established_timings;
235 /* Standard timings 1-8*/
236 struct std_timing standard_timings[8];
237 /* Detailing timings 1-4 */
238 struct detailed_timing detailed_timings[4];
239 /* Number of 128 byte ext. blocks */
240 u8 extensions;
241 /* Checksum */
242 u8 checksum;
243} __attribute__((packed));
244
Dave Airlief453ba02008-11-07 14:05:41 -0800245#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
246
Wu Fengguang76adaa342011-09-05 14:23:20 +0800247struct drm_encoder;
248struct drm_connector;
249struct drm_display_mode;
250void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid);
251int drm_av_sync_delay(struct drm_connector *connector,
252 struct drm_display_mode *mode);
253struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
254 struct drm_display_mode *mode);
Carsten Emdeda0df922012-03-18 22:37:33 +0100255int drm_load_edid_firmware(struct drm_connector *connector);
Wu Fengguang76adaa342011-09-05 14:23:20 +0800256
Dave Airlief453ba02008-11-07 14:05:41 -0800257#endif /* __DRM_EDID_H__ */