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-rw-r--r--include/drm/drm_edid.h202
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diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
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1/*
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
31#ifdef BIG_ENDIAN
32#error "EDID structure is little endian, need big endian versions"
33#else
34
35struct est_timings {
36 u8 t1;
37 u8 t2;
38 u8 mfg_rsvd;
39} __attribute__((packed));
40
41struct std_timing {
42 u8 hsize; /* need to multiply by 8 then add 248 */
43 u8 vfreq:6; /* need to add 60 */
44 u8 aspect_ratio:2; /* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
45} __attribute__((packed));
46
47/* If detailed data is pixel timing */
48struct detailed_pixel_timing {
49 u8 hactive_lo;
50 u8 hblank_lo;
51 u8 hblank_hi:4;
52 u8 hactive_hi:4;
53 u8 vactive_lo;
54 u8 vblank_lo;
55 u8 vblank_hi:4;
56 u8 vactive_hi:4;
57 u8 hsync_offset_lo;
58 u8 hsync_pulse_width_lo;
59 u8 vsync_pulse_width_lo:4;
60 u8 vsync_offset_lo:4;
61 u8 hsync_pulse_width_hi:2;
62 u8 hsync_offset_hi:2;
63 u8 vsync_pulse_width_hi:2;
64 u8 vsync_offset_hi:2;
65 u8 width_mm_lo;
66 u8 height_mm_lo;
67 u8 height_mm_hi:4;
68 u8 width_mm_hi:4;
69 u8 hborder;
70 u8 vborder;
71 u8 unknown0:1;
72 u8 vsync_positive:1;
73 u8 hsync_positive:1;
74 u8 separate_sync:2;
75 u8 stereo:1;
76 u8 unknown6:1;
77 u8 interlaced:1;
78} __attribute__((packed));
79
80/* If it's not pixel timing, it'll be one of the below */
81struct detailed_data_string {
82 u8 str[13];
83} __attribute__((packed));
84
85struct detailed_data_monitor_range {
86 u8 min_vfreq;
87 u8 max_vfreq;
88 u8 min_hfreq_khz;
89 u8 max_hfreq_khz;
90 u8 pixel_clock_mhz; /* need to multiply by 10 */
91 u16 sec_gtf_toggle; /* A000=use above, 20=use below */ /* FIXME: byte order */
92 u8 hfreq_start_khz; /* need to multiply by 2 */
93 u8 c; /* need to divide by 2 */
94 u16 m; /* FIXME: byte order */
95 u8 k;
96 u8 j; /* need to divide by 2 */
97} __attribute__((packed));
98
99struct detailed_data_wpindex {
100 u8 white_y_lo:2;
101 u8 white_x_lo:2;
102 u8 pad:4;
103 u8 white_x_hi;
104 u8 white_y_hi;
105 u8 gamma; /* need to divide by 100 then add 1 */
106} __attribute__((packed));
107
108struct detailed_data_color_point {
109 u8 windex1;
110 u8 wpindex1[3];
111 u8 windex2;
112 u8 wpindex2[3];
113} __attribute__((packed));
114
115struct detailed_non_pixel {
116 u8 pad1;
117 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
118 fb=color point data, fa=standard timing data,
119 f9=undefined, f8=mfg. reserved */
120 u8 pad2;
121 union {
122 struct detailed_data_string str;
123 struct detailed_data_monitor_range range;
124 struct detailed_data_wpindex color;
125 struct std_timing timings[5];
126 } data;
127} __attribute__((packed));
128
129#define EDID_DETAIL_STD_MODES 0xfa
130#define EDID_DETAIL_MONITOR_CPDATA 0xfb
131#define EDID_DETAIL_MONITOR_NAME 0xfc
132#define EDID_DETAIL_MONITOR_RANGE 0xfd
133#define EDID_DETAIL_MONITOR_STRING 0xfe
134#define EDID_DETAIL_MONITOR_SERIAL 0xff
135
136struct detailed_timing {
137 u16 pixel_clock; /* need to multiply by 10 KHz */ /* FIXME: byte order */
138 union {
139 struct detailed_pixel_timing pixel_data;
140 struct detailed_non_pixel other_data;
141 } data;
142} __attribute__((packed));
143
144struct edid {
145 u8 header[8];
146 /* Vendor & product info */
147 u8 mfg_id[2];
148 u8 prod_code[2];
149 u32 serial; /* FIXME: byte order */
150 u8 mfg_week;
151 u8 mfg_year;
152 /* EDID version */
153 u8 version;
154 u8 revision;
155 /* Display info: */
156 /* input definition */
157 u8 serration_vsync:1;
158 u8 sync_on_green:1;
159 u8 composite_sync:1;
160 u8 separate_syncs:1;
161 u8 blank_to_black:1;
162 u8 video_level:2;
163 u8 digital:1; /* bits below must be zero if set */
164 u8 width_cm;
165 u8 height_cm;
166 u8 gamma;
167 /* feature support */
168 u8 default_gtf:1;
169 u8 preferred_timing:1;
170 u8 standard_color:1;
171 u8 display_type:2; /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
172 u8 pm_active_off:1;
173 u8 pm_suspend:1;
174 u8 pm_standby:1;
175 /* Color characteristics */
176 u8 red_green_lo;
177 u8 black_white_lo;
178 u8 red_x;
179 u8 red_y;
180 u8 green_x;
181 u8 green_y;
182 u8 blue_x;
183 u8 blue_y;
184 u8 white_x;
185 u8 white_y;
186 /* Est. timings and mfg rsvd timings*/
187 struct est_timings established_timings;
188 /* Standard timings 1-8*/
189 struct std_timing standard_timings[8];
190 /* Detailing timings 1-4 */
191 struct detailed_timing detailed_timings[4];
192 /* Number of 128 byte ext. blocks */
193 u8 extensions;
194 /* Checksum */
195 u8 checksum;
196} __attribute__((packed));
197
198#endif /* little endian structs */
199
200#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
201
202#endif /* __DRM_EDID_H__ */
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