1 /*
2 * drivers/video/edid.h - EDID/DDC Header
3 *
4 * Based on:
5 * 1. XFree86 4.3.0, edid.h
6 * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
7 *
8 * 2. John Fremlin <vii@users.sourceforge.net> and
9 * Ani Joshi <ajoshi@unixbox.com>
10 *
11 * DDC is a Trademark of VESA (Video Electronics Standard Association).
12 *
13 * This file is subject to the terms and conditions of the GNU General Public
14 * License. See the file COPYING in the main directory of this archive
15 * for more details.
16 */
17
18 #ifndef __EDID_H__
19 #define __EDID_H__
20
21 #define EDID_LENGTH 0x80
22 #define EDID_HEADER 0x00
23 #define EDID_HEADER_END 0x07
24
25 #define ID_MANUFACTURER_NAME 0x08
26 #define ID_MANUFACTURER_NAME_END 0x09
27 #define ID_MODEL 0x0a
28
29 #define ID_SERIAL_NUMBER 0x0c
30
31 #define MANUFACTURE_WEEK 0x10
32 #define MANUFACTURE_YEAR 0x11
33
34 #define EDID_STRUCT_VERSION 0x12
35 #define EDID_STRUCT_REVISION 0x13
36
37 #define EDID_STRUCT_DISPLAY 0x14
38
39 #define DPMS_FLAGS 0x18
40 #define ESTABLISHED_TIMING_1 0x23
41 #define ESTABLISHED_TIMING_2 0x24
42 #define MANUFACTURERS_TIMINGS 0x25
43
44 /* standard timings supported */
45 #define STD_TIMING 8
46 #define STD_TIMING_DESCRIPTION_SIZE 2
47 #define STD_TIMING_DESCRIPTIONS_START 0x26
48
49 #define DETAILED_TIMING_DESCRIPTIONS_START 0x36
50 #define DETAILED_TIMING_DESCRIPTION_SIZE 18
51 #define NO_DETAILED_TIMING_DESCRIPTIONS 4
52
53 #define DETAILED_TIMING_DESCRIPTION_1 0x36
54 #define DETAILED_TIMING_DESCRIPTION_2 0x48
55 #define DETAILED_TIMING_DESCRIPTION_3 0x5a
56 #define DETAILED_TIMING_DESCRIPTION_4 0x6c
57
58 #define DESCRIPTOR_DATA 5
59
60 #define UPPER_NIBBLE( x ) \
61 (((128|64|32|16) & (x)) >> 4)
62
63 #define LOWER_NIBBLE( x ) \
64 ((1|2|4|8) & (x))
65
66 #define COMBINE_HI_8LO( hi, lo ) \
67 ( (((unsigned)hi) << 8) | (unsigned)lo )
68
69 #define COMBINE_HI_4LO( hi, lo ) \
70 ( (((unsigned)hi) << 4) | (unsigned)lo )
71
72 #define PIXEL_CLOCK_LO (unsigned)block[ 0 ]
73 #define PIXEL_CLOCK_HI (unsigned)block[ 1 ]
74 #define PIXEL_CLOCK (COMBINE_HI_8LO( PIXEL_CLOCK_HI,PIXEL_CLOCK_LO )*10000)
75 #define H_ACTIVE_LO (unsigned)block[ 2 ]
76 #define H_BLANKING_LO (unsigned)block[ 3 ]
77 #define H_ACTIVE_HI UPPER_NIBBLE( (unsigned)block[ 4 ] )
78 #define H_ACTIVE COMBINE_HI_8LO( H_ACTIVE_HI, H_ACTIVE_LO )
79 #define H_BLANKING_HI LOWER_NIBBLE( (unsigned)block[ 4 ] )
80 #define H_BLANKING COMBINE_HI_8LO( H_BLANKING_HI, H_BLANKING_LO )
81
82 #define V_ACTIVE_LO (unsigned)block[ 5 ]
83 #define V_BLANKING_LO (unsigned)block[ 6 ]
84 #define V_ACTIVE_HI UPPER_NIBBLE( (unsigned)block[ 7 ] )
85 #define V_ACTIVE COMBINE_HI_8LO( V_ACTIVE_HI, V_ACTIVE_LO )
86 #define V_BLANKING_HI LOWER_NIBBLE( (unsigned)block[ 7 ] )
87 #define V_BLANKING COMBINE_HI_8LO( V_BLANKING_HI, V_BLANKING_LO )
88
89 #define H_SYNC_OFFSET_LO (unsigned)block[ 8 ]
90 #define H_SYNC_WIDTH_LO (unsigned)block[ 9 ]
91
92 #define V_SYNC_OFFSET_LO UPPER_NIBBLE( (unsigned)block[ 10 ] )
93 #define V_SYNC_WIDTH_LO LOWER_NIBBLE( (unsigned)block[ 10 ] )
94
95 #define V_SYNC_WIDTH_HI ((unsigned)block[ 11 ] & (1|2))
96 #define V_SYNC_OFFSET_HI (((unsigned)block[ 11 ] & (4|8)) >> 2)
97
98 #define H_SYNC_WIDTH_HI (((unsigned)block[ 11 ] & (16|32)) >> 4)
99 #define H_SYNC_OFFSET_HI (((unsigned)block[ 11 ] & (64|128)) >> 6)
100
101 #define V_SYNC_WIDTH COMBINE_HI_4LO( V_SYNC_WIDTH_HI, V_SYNC_WIDTH_LO )
102 #define V_SYNC_OFFSET COMBINE_HI_4LO( V_SYNC_OFFSET_HI, V_SYNC_OFFSET_LO )
103
104 #define H_SYNC_WIDTH COMBINE_HI_4LO( H_SYNC_WIDTH_HI, H_SYNC_WIDTH_LO )
105 #define H_SYNC_OFFSET COMBINE_HI_4LO( H_SYNC_OFFSET_HI, H_SYNC_OFFSET_LO )
106
107 #define H_SIZE_LO (unsigned)block[ 12 ]
108 #define V_SIZE_LO (unsigned)block[ 13 ]
109
110 #define H_SIZE_HI UPPER_NIBBLE( (unsigned)block[ 14 ] )
111 #define V_SIZE_HI LOWER_NIBBLE( (unsigned)block[ 14 ] )
112
113 #define H_SIZE COMBINE_HI_8LO( H_SIZE_HI, H_SIZE_LO )
114 #define V_SIZE COMBINE_HI_8LO( V_SIZE_HI, V_SIZE_LO )
115
116 #define H_BORDER (unsigned)block[ 15 ]
117 #define V_BORDER (unsigned)block[ 16 ]
118
119 #define FLAGS (unsigned)block[ 17 ]
120
121 #define INTERLACED (FLAGS&128)
122 #define SYNC_TYPE (FLAGS&3<<3) /* bits 4,3 */
123 #define SYNC_SEPARATE (3<<3)
124 #define HSYNC_POSITIVE (FLAGS & 4)
125 #define VSYNC_POSITIVE (FLAGS & 2)
126
127 #define V_MIN_RATE block[ 5 ]
128 #define V_MAX_RATE block[ 6 ]
129 #define H_MIN_RATE block[ 7 ]
130 #define H_MAX_RATE block[ 8 ]
131 #define MAX_PIXEL_CLOCK (((int)block[ 9 ]) * 10)
132 #define GTF_SUPPORT block[10]
133
134 #define DPMS_ACTIVE_OFF (1 << 5)
135 #define DPMS_SUSPEND (1 << 6)
136 #define DPMS_STANDBY (1 << 7)
137
138 #endif /* __EDID_H__ */
139
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