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#define CEA_EXT 0x02 32#define VTB_EXT 0x10 33#define DI_EXT 0x40 34#define LS_EXT 0x50 35#define MI_EXT 0x60 36 37struct est_timings { 38 u8 t1; 39 u8 t2; 40 u8 mfg_rsvd; 41} __attribute__((packed)); 42 43/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */ 44#define EDID_TIMING_ASPECT_SHIFT 6 45#define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT) 46 47/* need to add 60 */ 48#define EDID_TIMING_VFREQ_SHIFT 0 49#define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT) 50 51struct std_timing { 52 u8 hsize; /* need to multiply by 8 then add 248 */ 53 u8 vfreq_aspect; 54} __attribute__((packed)); 55 56#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1) 57#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2) 58#define DRM_EDID_PT_SEPARATE_SYNC (3 << 3) 59#define DRM_EDID_PT_STEREO (1 << 5) 60#define DRM_EDID_PT_INTERLACED (1 << 7) 61 62/* If detailed data is pixel timing */ 63struct detailed_pixel_timing { 64 u8 hactive_lo; 65 u8 hblank_lo; 66 u8 hactive_hblank_hi; 67 u8 vactive_lo; 68 u8 vblank_lo; 69 u8 vactive_vblank_hi; 70 u8 hsync_offset_lo; 71 u8 hsync_pulse_width_lo; 72 u8 vsync_offset_pulse_width_lo; 73 u8 hsync_vsync_offset_pulse_width_hi; 74 u8 width_mm_lo; 75 u8 height_mm_lo; 76 u8 width_height_mm_hi; 77 u8 hborder; 78 u8 vborder; 79 u8 misc; 80} __attribute__((packed)); 81 82/* If it's not pixel timing, it'll be one of the below */ 83struct detailed_data_string { 84 u8 str[13]; 85} __attribute__((packed)); 86 87struct detailed_data_monitor_range { 88 u8 min_vfreq; 89 u8 max_vfreq; 90 u8 min_hfreq_khz; 91 u8 max_hfreq_khz; 92 u8 pixel_clock_mhz; /* need to multiply by 10 */ 93 __le16 sec_gtf_toggle; /* A000=use above, 20=use below */ 94 u8 hfreq_start_khz; /* need to multiply by 2 */ 95 u8 c; /* need to divide by 2 */ 96 __le16 m; 97 u8 k; 98 u8 j; /* need to divide by 2 */ 99} __attribute__((packed)); 100 101struct detailed_data_wpindex { 102 u8 white_yx_lo; /* Lower 2 bits each */ 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 cvt_timing { 116 u8 code[3]; 117} __attribute__((packed)); 118 119struct detailed_non_pixel { 120 u8 pad1; 121 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name 122 fb=color point data, fa=standard timing data, 123 f9=undefined, f8=mfg. reserved */ 124 u8 pad2; 125 union { 126 struct detailed_data_string str; 127 struct detailed_data_monitor_range range; 128 struct detailed_data_wpindex color; 129 struct std_timing timings[6]; 130 struct cvt_timing cvt[4]; 131 } data; 132} __attribute__((packed)); 133 134#define EDID_DETAIL_EST_TIMINGS 0xf7 135#define EDID_DETAIL_CVT_3BYTE 0xf8 136#define EDID_DETAIL_COLOR_MGMT_DATA 0xf9 137#define EDID_DETAIL_STD_MODES 0xfa 138#define EDID_DETAIL_MONITOR_CPDATA 0xfb 139#define EDID_DETAIL_MONITOR_NAME 0xfc 140#define EDID_DETAIL_MONITOR_RANGE 0xfd 141#define EDID_DETAIL_MONITOR_STRING 0xfe 142#define EDID_DETAIL_MONITOR_SERIAL 0xff 143 144struct detailed_timing { 145 __le16 pixel_clock; /* need to multiply by 10 KHz */ 146 union { 147 struct detailed_pixel_timing pixel_data; 148 struct detailed_non_pixel other_data; 149 } data; 150} __attribute__((packed)); 151 152#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0) 153#define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1) 154#define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2) 155#define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3) 156#define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4) 157#define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5) 158#define DRM_EDID_INPUT_DIGITAL (1 << 7) /* bits below must be zero if set */ 159 160#define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0) 161#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1) 162#define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2) 163#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */ 164#define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5) 165#define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6) 166#define DRM_EDID_FEATURE_PM_STANDBY (1 << 7) 167 168struct edid { 169 u8 header[8]; 170 /* Vendor & product info */ 171 u8 mfg_id[2]; 172 u8 prod_code[2]; 173 u32 serial; 174 u8 mfg_week; 175 u8 mfg_year; 176 /* EDID version */ 177 u8 version; 178 u8 revision; 179 /* Display info: */ 180 u8 input; 181 u8 width_cm; 182 u8 height_cm; 183 u8 gamma; 184 u8 features; 185 /* Color characteristics */ 186 u8 red_green_lo; 187 u8 black_white_lo; 188 u8 red_x; 189 u8 red_y; 190 u8 green_x; 191 u8 green_y; 192 u8 blue_x; 193 u8 blue_y; 194 u8 white_x; 195 u8 white_y; 196 /* Est. timings and mfg rsvd timings*/ 197 struct est_timings established_timings; 198 /* Standard timings 1-8*/ 199 struct std_timing standard_timings[8]; 200 /* Detailing timings 1-4 */ 201 struct detailed_timing detailed_timings[4]; 202 /* Number of 128 byte ext. blocks */ 203 u8 extensions; 204 /* Checksum */ 205 u8 checksum; 206} __attribute__((packed)); 207 208#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8)) 209 210#endif /* __DRM_EDID_H__ */ 211