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 35 struct est_timings { 36 u8 t1; 37 u8 t2; 38 u8 mfg_rsvd; 39 } __attribute__((packed)); 40 41 struct 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 */ 48 struct 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 vsync_pulse_width_hi:2; 62 u8 vsync_offset_hi:2; 63 u8 hsync_pulse_width_hi:2; 64 u8 hsync_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 hsync_positive:1; 73 u8 vsync_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 */ 81 struct detailed_data_string { 82 u8 str[13]; 83 } __attribute__((packed)); 84 85 struct 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 99 struct 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)); 107 108 struct detailed_data_color_point { 109 u8 windex1; 110 u8 wpindex1[3]; 111 u8 windex2; 112 u8 wpindex2[3]; 113 } __attribute__((packed)); 114 115 struct 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 135 136 struct 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)); 143 144 struct 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__ */ 203