-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathedid.h
258 lines (246 loc) · 9.17 KB
/
edid.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
/*
* Copyright (c) 2012 The Chromium OS Authors.
*
* (C) Copyright 2010
* Petr Stetiar <[email protected]>
*
* SPDX-License-Identifier: GPL-2.0+
*
* Contains stolen code from ddcprobe project which is:
* Copyright (C) Nalin Dahyabhai <[email protected]>
*/
#ifndef __EDID_H_
#define __EDID_H_
#include <linux/types.h>
#define GET_BIT(_x, _pos) \
(((_x) >> (_pos)) & 1)
#define GET_BITS(_x, _pos_msb, _pos_lsb) \
(((_x) >> (_pos_lsb)) & ((1 << ((_pos_msb) - (_pos_lsb) + 1)) - 1))
/* Aspect ratios used in EDID info. */
enum edid_aspect {
ASPECT_625 = 0,
ASPECT_75,
ASPECT_8,
ASPECT_5625,
};
/* Detailed timing information used in EDID v1.x */
struct edid_detailed_timing {
unsigned char pixel_clock[2];
#define EDID_DETAILED_TIMING_PIXEL_CLOCK(_x) \
(((((uint32_t)(_x).pixel_clock[1]) << 8) + \
(_x).pixel_clock[0]) * 10000)
unsigned char horizontal_active;
unsigned char horizontal_blanking;
unsigned char horizontal_active_blanking_hi;
#define EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(_x) \
((GET_BITS((_x).horizontal_active_blanking_hi, 7, 4) << 8) + \
(_x).horizontal_active)
#define EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(_x) \
((GET_BITS((_x).horizontal_active_blanking_hi, 3, 0) << 8) + \
(_x).horizontal_blanking)
unsigned char vertical_active;
unsigned char vertical_blanking;
unsigned char vertical_active_blanking_hi;
#define EDID_DETAILED_TIMING_VERTICAL_ACTIVE(_x) \
((GET_BITS((_x).vertical_active_blanking_hi, 7, 4) << 8) + \
(_x).vertical_active)
#define EDID_DETAILED_TIMING_VERTICAL_BLANKING(_x) \
((GET_BITS((_x).vertical_active_blanking_hi, 3, 0) << 8) + \
(_x).vertical_blanking)
unsigned char hsync_offset;
unsigned char hsync_pulse_width;
unsigned char vsync_offset_pulse_width;
unsigned char hsync_vsync_offset_pulse_width_hi;
#define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \
((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \
(_x).hsync_offset)
#define EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(_x) \
((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 5, 4) << 8) + \
(_x).hsync_pulse_width)
#define EDID_DETAILED_TIMING_VSYNC_OFFSET(_x) \
((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 3, 2) << 4) + \
GET_BITS((_x).vsync_offset_pulse_width, 7, 4))
#define EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(_x) \
((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 1, 0) << 4) + \
GET_BITS((_x).vsync_offset_pulse_width, 3, 0))
unsigned char himage_size;
unsigned char vimage_size;
unsigned char himage_vimage_size_hi;
#define EDID_DETAILED_TIMING_HIMAGE_SIZE(_x) \
((GET_BITS((_x).himage_vimage_size_hi, 7, 4) << 8) + (_x).himage_size)
#define EDID_DETAILED_TIMING_VIMAGE_SIZE(_x) \
((GET_BITS((_x).himage_vimage_size_hi, 3, 0) << 8) + (_x).vimage_size)
unsigned char hborder;
unsigned char vborder;
unsigned char flags;
#define EDID_DETAILED_TIMING_FLAG_INTERLACED(_x) \
GET_BIT((_x).flags, 7)
#define EDID_DETAILED_TIMING_FLAG_STEREO(_x) \
GET_BITS((_x).flags, 6, 5)
#define EDID_DETAILED_TIMING_FLAG_DIGITAL_COMPOSITE(_x) \
GET_BITS((_x).flags, 4, 3)
#define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \
GET_BITS((_x).flags, 2, 1)
#define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \
GET_BIT((_x).flags, 0)
} __attribute__ ((__packed__));
enum edid_monitor_descriptor_types {
EDID_MONITOR_DESCRIPTOR_SERIAL = 0xff,
EDID_MONITOR_DESCRIPTOR_ASCII = 0xfe,
EDID_MONITOR_DESCRIPTOR_RANGE = 0xfd,
EDID_MONITOR_DESCRIPTOR_NAME = 0xfc,
};
struct edid_monitor_descriptor {
uint16_t zero_flag_1;
unsigned char zero_flag_2;
unsigned char type;
unsigned char zero_flag_3;
union {
char string[13];
struct {
unsigned char vertical_min;
unsigned char vertical_max;
unsigned char horizontal_min;
unsigned char horizontal_max;
unsigned char pixel_clock_max;
unsigned char gtf_data[8];
} range_data;
} data;
} __attribute__ ((__packed__));
struct edid1_info {
unsigned char header[8];
unsigned char manufacturer_name[2];
#define EDID1_INFO_MANUFACTURER_NAME_ZERO(_x) \
GET_BIT(((_x).manufacturer_name[0]), 7)
#define EDID1_INFO_MANUFACTURER_NAME_CHAR1(_x) \
GET_BITS(((_x).manufacturer_name[0]), 6, 2)
#define EDID1_INFO_MANUFACTURER_NAME_CHAR2(_x) \
((GET_BITS(((_x).manufacturer_name[0]), 1, 0) << 3) + \
GET_BITS(((_x).manufacturer_name[1]), 7, 5))
#define EDID1_INFO_MANUFACTURER_NAME_CHAR3(_x) \
GET_BITS(((_x).manufacturer_name[1]), 4, 0)
unsigned char product_code[2];
#define EDID1_INFO_PRODUCT_CODE(_x) \
(((uint16_t)(_x).product_code[1] << 8) + (_x).product_code[0])
unsigned char serial_number[4];
#define EDID1_INFO_SERIAL_NUMBER(_x) \
(((uint32_t)(_x).serial_number[3] << 24) + \
((_x).serial_number[2] << 16) + ((_x).serial_number[1] << 8) + \
(_x).serial_number[0])
unsigned char week;
unsigned char year;
unsigned char version;
unsigned char revision;
unsigned char video_input_definition;
#define EDID1_INFO_VIDEO_INPUT_DIGITAL(_x) \
GET_BIT(((_x).video_input_definition), 7)
#define EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(_x) \
GET_BITS(((_x).video_input_definition), 6, 5)
#define EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(_x) \
GET_BIT(((_x).video_input_definition), 4)
#define EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(_x) \
GET_BIT(((_x).video_input_definition), 3)
#define EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(_x) \
GET_BIT(((_x).video_input_definition), 2)
#define EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(_x) \
GET_BIT(((_x).video_input_definition), 1)
#define EDID1_INFO_VIDEO_INPUT_SERRATION_V(_x) \
GET_BIT(((_x).video_input_definition), 0)
unsigned char max_size_horizontal;
unsigned char max_size_vertical;
unsigned char gamma;
unsigned char feature_support;
#define EDID1_INFO_FEATURE_STANDBY(_x) \
GET_BIT(((_x).feature_support), 7)
#define EDID1_INFO_FEATURE_SUSPEND(_x) \
GET_BIT(((_x).feature_support), 6)
#define EDID1_INFO_FEATURE_ACTIVE_OFF(_x) \
GET_BIT(((_x).feature_support), 5)
#define EDID1_INFO_FEATURE_DISPLAY_TYPE(_x) \
GET_BITS(((_x).feature_support), 4, 3)
#define EDID1_INFO_FEATURE_RGB(_x) \
GET_BIT(((_x).feature_support), 2)
#define EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(_x) \
GET_BIT(((_x).feature_support), 1)
#define EDID1_INFO_FEATURE_DEFAULT_GTF_SUPPORT(_x) \
GET_BIT(((_x).feature_support), 0)
unsigned char color_characteristics[10];
unsigned char established_timings[3];
#define EDID1_INFO_ESTABLISHED_TIMING_720X400_70(_x) \
GET_BIT(((_x).established_timings[0]), 7)
#define EDID1_INFO_ESTABLISHED_TIMING_720X400_88(_x) \
GET_BIT(((_x).established_timings[0]), 6)
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_60(_x) \
GET_BIT(((_x).established_timings[0]), 5)
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_67(_x) \
GET_BIT(((_x).established_timings[0]), 4)
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_72(_x) \
GET_BIT(((_x).established_timings[0]), 3)
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_75(_x) \
GET_BIT(((_x).established_timings[0]), 2)
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_56(_x) \
GET_BIT(((_x).established_timings[0]), 1)
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_60(_x) \
GET_BIT(((_x).established_timings[0]), 0)
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_72(_x) \
GET_BIT(((_x).established_timings[1]), 7)
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_75(_x) \
GET_BIT(((_x).established_timings[1]), 6)
#define EDID1_INFO_ESTABLISHED_TIMING_832X624_75(_x) \
GET_BIT(((_x).established_timings[1]), 5)
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(_x) \
GET_BIT(((_x).established_timings[1]), 4)
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(_x) \
GET_BIT(((_x).established_timings[1]), 3)
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(_x) \
GET_BIT(((_x).established_timings[1]), 2)
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(_x) \
GET_BIT(((_x).established_timings[1]), 1)
#define EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(_x) \
GET_BIT(((_x).established_timings[1]), 0)
#define EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(_x) \
GET_BIT(((_x).established_timings[2]), 7)
struct {
unsigned char xresolution;
unsigned char aspect_vfreq;
} __attribute__((__packed__)) standard_timings[8];
#define EDID1_INFO_STANDARD_TIMING_XRESOLUTION(_x, _i) \
(((_x).standard_timings[_i]).xresolution)
#define EDID1_INFO_STANDARD_TIMING_ASPECT(_x, _i) \
GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 7, 6)
#define EDID1_INFO_STANDARD_TIMING_VFREQ(_x, _i) \
GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 5, 0)
union {
unsigned char timing[72];
struct edid_monitor_descriptor descriptor[4];
} monitor_details;
unsigned char extension_flag;
unsigned char checksum;
} __attribute__ ((__packed__));
/**
* Print the EDID info.
*
* @param edid_info The EDID info to be printed
*/
void edid_print_info(struct edid1_info *edid_info);
/**
* Check the EDID info.
*
* @param info The EDID info to be checked
* @return 0 on valid, or -1 on invalid
*/
int edid_check_info(struct edid1_info *info);
/**
* Get the horizontal and vertical rate ranges of the monitor.
*
* @param edid The EDID info
* @param hmin Returns the minimum horizontal rate
* @param hmax Returns the maxium horizontal rate
* @param vmin Returns the minimum vertical rate
* @param vmax Returns the maxium vertical rate
* @return 0 on success, or -1 on error
*/
int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
unsigned int *hmax, unsigned int *vmin,
unsigned int *vmax);
#endif /* __EDID_H_ */