Atlas - edid.h
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1/*
2 * Copyright 2007 Red Hat, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23/* Author: Soren Sandmann <[email protected]> */
24
25typedef unsigned char uchar;
26typedef struct MonitorInfo MonitorInfo;
27typedef struct Timing Timing;
28typedef struct DetailedTiming DetailedTiming;
29
30typedef enum
31{
32    UNDEFINED,
33    DVI,
34    HDMI_A,
35    HDMI_B,
36    MDDI,
37    DISPLAY_PORT
38} Interface;
39
40typedef enum
41{
42    UNDEFINED_COLOR,
43    MONOCHROME,
44    RGB,
45    OTHER_COLOR
46} ColorType;
47
48typedef enum
49{
50    NO_STEREO,
51    FIELD_RIGHT,
52    FIELD_LEFT,
53    TWO_WAY_RIGHT_ON_EVEN,
54    TWO_WAY_LEFT_ON_EVEN,
55    FOUR_WAY_INTERLEAVED,
56    SIDE_BY_SIDE
57} StereoType;
58
59struct Timing
60{
61    int width;
62    int height;
63    int frequency;
64};
65
66struct DetailedTiming
67{
68    int pixel_clock;
69    int h_addr;
70    int h_blank;
71    int h_sync;
72    int h_front_porch;
73    int v_addr;
74    int v_blank;
75    int v_sync;
76    int v_front_porch;
77    int width_mm;
78    int height_mm;
79    int right_border;
80    int top_border;
81    int interlaced;
82    StereoType stereo;
83
84    int digital_sync;
85    union
86    {
87        struct
88        {
89            int bipolar;
90            int serrations;
91            int sync_on_green;
92        } analog;
93
94        struct
95        {
96            int composite;
97            int serrations;
98            int negative_vsync;
99            int negative_hsync;
100        } digital;
101    } ad;
102};
103
104struct MonitorInfo
105{
106    int checksum;
107    char manufacturer_code[4];
108    int product_code;
109    unsigned int serial_number;
110
111    int production_week; // -1 if not specified
112    int production_year; // -1 if not specified
113    int model_year;      // -1 if not specified
114
115    int major_version;
116    int minor_version;
117
118    int is_digital;
119
120    union
121    {
122        struct
123        {
124            int bits_per_primary;
125            Interface interface;
126            int rgb444;
127            int ycrcb444;
128            int ycrcb422;
129        } digital;
130
131        struct
132        {
133            double video_signal_level;
134            double sync_signal_level;
135            double total_signal_level;
136
137            int blank_to_black;
138
139            int separate_hv_sync;
140            int composite_sync_on_h;
141            int composite_sync_on_green;
142            int serration_on_vsync;
143            ColorType color_type;
144        } analog;
145    } ad;
146
147    int width_mm;        // -1 if not specified
148    int height_mm;       // -1 if not specified
149    double aspect_ratio; // -1.0 if not specififed
150
151    double gamma; // -1.0 if not specified
152
153    int standby;
154    int suspend;
155    int active_off;
156
157    int srgb_is_standard;
158    int preferred_timing_includes_native;
159    int continuous_frequency;
160
161    double red_x;
162    double red_y;
163    double green_x;
164    double green_y;
165    double blue_x;
166    double blue_y;
167    double white_x;
168    double white_y;
169
170    Timing established[24]; // Terminated by 0x0x0
171    Timing standard[8];
172
173    int n_detailed_timings;
174    DetailedTiming detailed_timings[4]; /* If monitor has a preferred
175                                         * mode, it is the first one
176                                         * (whether it has, is
177                                         * determined by the
178                                         * preferred_timing_includes
179                                         * bit.
180                                         */
181
182    // Optional product description
183    char dsc_serial_number[14];
184    char dsc_product_name[14];
185    char dsc_string[14]; // Unspecified ASCII data
186};
187
188MonitorInfo *decode_edid(const uchar *data);
189void dump_monitor_info(MonitorInfo *info);
190char *make_display_name(const char *output_name,
191                        const MonitorInfo *info);
192
[FILE END]
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