1*83d290c5STom Rini /* SPDX-License-Identifier: GPL-2.0+ */ 2d46b5f7dSTom Wai-Hong Tam /* 3d46b5f7dSTom Wai-Hong Tam * Copyright (c) 2012 The Chromium OS Authors. 4d46b5f7dSTom Wai-Hong Tam * 5d46b5f7dSTom Wai-Hong Tam * (C) Copyright 2010 6d46b5f7dSTom Wai-Hong Tam * Petr Stetiar <ynezz@true.cz> 7d46b5f7dSTom Wai-Hong Tam * 8d46b5f7dSTom Wai-Hong Tam * Contains stolen code from ddcprobe project which is: 9d46b5f7dSTom Wai-Hong Tam * Copyright (C) Nalin Dahyabhai <bigfun@pobox.com> 10d46b5f7dSTom Wai-Hong Tam */ 11d46b5f7dSTom Wai-Hong Tam 12d46b5f7dSTom Wai-Hong Tam #ifndef __EDID_H_ 13d46b5f7dSTom Wai-Hong Tam #define __EDID_H_ 14d46b5f7dSTom Wai-Hong Tam 15d46b5f7dSTom Wai-Hong Tam #include <linux/types.h> 16d46b5f7dSTom Wai-Hong Tam 1700cf1167SSimon Glass /* Size of the EDID data */ 1800cf1167SSimon Glass #define EDID_SIZE 128 192dcf1433SSimon Glass #define EDID_EXT_SIZE 256 2000cf1167SSimon Glass 2143c6bdd0SJernej Skrabec /* OUI of HDMI vendor specific data block */ 2243c6bdd0SJernej Skrabec #define HDMI_IEEE_OUI 0x000c03 2343c6bdd0SJernej Skrabec 24d46b5f7dSTom Wai-Hong Tam #define GET_BIT(_x, _pos) \ 25d46b5f7dSTom Wai-Hong Tam (((_x) >> (_pos)) & 1) 26d46b5f7dSTom Wai-Hong Tam #define GET_BITS(_x, _pos_msb, _pos_lsb) \ 27d46b5f7dSTom Wai-Hong Tam (((_x) >> (_pos_lsb)) & ((1 << ((_pos_msb) - (_pos_lsb) + 1)) - 1)) 28d46b5f7dSTom Wai-Hong Tam 29d46b5f7dSTom Wai-Hong Tam /* Aspect ratios used in EDID info. */ 30d46b5f7dSTom Wai-Hong Tam enum edid_aspect { 31d46b5f7dSTom Wai-Hong Tam ASPECT_625 = 0, 32d46b5f7dSTom Wai-Hong Tam ASPECT_75, 33d46b5f7dSTom Wai-Hong Tam ASPECT_8, 34d46b5f7dSTom Wai-Hong Tam ASPECT_5625, 35d46b5f7dSTom Wai-Hong Tam }; 36d46b5f7dSTom Wai-Hong Tam 37d46b5f7dSTom Wai-Hong Tam /* Detailed timing information used in EDID v1.x */ 38d46b5f7dSTom Wai-Hong Tam struct edid_detailed_timing { 39d46b5f7dSTom Wai-Hong Tam unsigned char pixel_clock[2]; 40d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_PIXEL_CLOCK(_x) \ 41d46b5f7dSTom Wai-Hong Tam (((((uint32_t)(_x).pixel_clock[1]) << 8) + \ 42d46b5f7dSTom Wai-Hong Tam (_x).pixel_clock[0]) * 10000) 43d46b5f7dSTom Wai-Hong Tam unsigned char horizontal_active; 44d46b5f7dSTom Wai-Hong Tam unsigned char horizontal_blanking; 45d46b5f7dSTom Wai-Hong Tam unsigned char horizontal_active_blanking_hi; 46d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(_x) \ 47d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).horizontal_active_blanking_hi, 7, 4) << 8) + \ 48d46b5f7dSTom Wai-Hong Tam (_x).horizontal_active) 49d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(_x) \ 50d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).horizontal_active_blanking_hi, 3, 0) << 8) + \ 51d46b5f7dSTom Wai-Hong Tam (_x).horizontal_blanking) 52d46b5f7dSTom Wai-Hong Tam unsigned char vertical_active; 53d46b5f7dSTom Wai-Hong Tam unsigned char vertical_blanking; 54d46b5f7dSTom Wai-Hong Tam unsigned char vertical_active_blanking_hi; 55d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_VERTICAL_ACTIVE(_x) \ 56d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).vertical_active_blanking_hi, 7, 4) << 8) + \ 57d46b5f7dSTom Wai-Hong Tam (_x).vertical_active) 58d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_VERTICAL_BLANKING(_x) \ 59d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).vertical_active_blanking_hi, 3, 0) << 8) + \ 60d46b5f7dSTom Wai-Hong Tam (_x).vertical_blanking) 61d46b5f7dSTom Wai-Hong Tam unsigned char hsync_offset; 62d46b5f7dSTom Wai-Hong Tam unsigned char hsync_pulse_width; 631dc793ddSChristian Gmeiner unsigned char vsync_offset_pulse_width; 64d46b5f7dSTom Wai-Hong Tam unsigned char hsync_vsync_offset_pulse_width_hi; 65d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \ 66d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \ 67d46b5f7dSTom Wai-Hong Tam (_x).hsync_offset) 68d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(_x) \ 69d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 5, 4) << 8) + \ 70d46b5f7dSTom Wai-Hong Tam (_x).hsync_pulse_width) 71d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_VSYNC_OFFSET(_x) \ 72d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 3, 2) << 4) + \ 73d46b5f7dSTom Wai-Hong Tam GET_BITS((_x).vsync_offset_pulse_width, 7, 4)) 74d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(_x) \ 75d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 1, 0) << 4) + \ 76d46b5f7dSTom Wai-Hong Tam GET_BITS((_x).vsync_offset_pulse_width, 3, 0)) 77d46b5f7dSTom Wai-Hong Tam unsigned char himage_size; 78d46b5f7dSTom Wai-Hong Tam unsigned char vimage_size; 79d46b5f7dSTom Wai-Hong Tam unsigned char himage_vimage_size_hi; 80d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_HIMAGE_SIZE(_x) \ 81d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).himage_vimage_size_hi, 7, 4) << 8) + (_x).himage_size) 82d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_VIMAGE_SIZE(_x) \ 83d46b5f7dSTom Wai-Hong Tam ((GET_BITS((_x).himage_vimage_size_hi, 3, 0) << 8) + (_x).vimage_size) 84d46b5f7dSTom Wai-Hong Tam unsigned char hborder; 85d46b5f7dSTom Wai-Hong Tam unsigned char vborder; 86d46b5f7dSTom Wai-Hong Tam unsigned char flags; 87d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_FLAG_INTERLACED(_x) \ 88d46b5f7dSTom Wai-Hong Tam GET_BIT((_x).flags, 7) 89d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_FLAG_STEREO(_x) \ 90d46b5f7dSTom Wai-Hong Tam GET_BITS((_x).flags, 6, 5) 91d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_FLAG_DIGITAL_COMPOSITE(_x) \ 92d46b5f7dSTom Wai-Hong Tam GET_BITS((_x).flags, 4, 3) 93d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \ 94d46b5f7dSTom Wai-Hong Tam GET_BITS((_x).flags, 2, 1) 95b7ce12ddSHans de Goede #define EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(_x) \ 96b7ce12ddSHans de Goede GET_BIT((_x).flags, 2) 97b7ce12ddSHans de Goede #define EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(_x) \ 98b7ce12ddSHans de Goede GET_BIT((_x).flags, 1) 99d46b5f7dSTom Wai-Hong Tam #define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \ 100d46b5f7dSTom Wai-Hong Tam GET_BIT((_x).flags, 0) 101d46b5f7dSTom Wai-Hong Tam } __attribute__ ((__packed__)); 102d46b5f7dSTom Wai-Hong Tam 103d46b5f7dSTom Wai-Hong Tam enum edid_monitor_descriptor_types { 104d46b5f7dSTom Wai-Hong Tam EDID_MONITOR_DESCRIPTOR_SERIAL = 0xff, 105d46b5f7dSTom Wai-Hong Tam EDID_MONITOR_DESCRIPTOR_ASCII = 0xfe, 106d46b5f7dSTom Wai-Hong Tam EDID_MONITOR_DESCRIPTOR_RANGE = 0xfd, 107d46b5f7dSTom Wai-Hong Tam EDID_MONITOR_DESCRIPTOR_NAME = 0xfc, 108d46b5f7dSTom Wai-Hong Tam }; 109d46b5f7dSTom Wai-Hong Tam 110d46b5f7dSTom Wai-Hong Tam struct edid_monitor_descriptor { 111d46b5f7dSTom Wai-Hong Tam uint16_t zero_flag_1; 112d46b5f7dSTom Wai-Hong Tam unsigned char zero_flag_2; 113d46b5f7dSTom Wai-Hong Tam unsigned char type; 114d46b5f7dSTom Wai-Hong Tam unsigned char zero_flag_3; 115d46b5f7dSTom Wai-Hong Tam union { 116d46b5f7dSTom Wai-Hong Tam char string[13]; 117d46b5f7dSTom Wai-Hong Tam struct { 118d46b5f7dSTom Wai-Hong Tam unsigned char vertical_min; 119d46b5f7dSTom Wai-Hong Tam unsigned char vertical_max; 120d46b5f7dSTom Wai-Hong Tam unsigned char horizontal_min; 121d46b5f7dSTom Wai-Hong Tam unsigned char horizontal_max; 122d46b5f7dSTom Wai-Hong Tam unsigned char pixel_clock_max; 123d46b5f7dSTom Wai-Hong Tam unsigned char gtf_data[8]; 124d46b5f7dSTom Wai-Hong Tam } range_data; 125d46b5f7dSTom Wai-Hong Tam } data; 126d46b5f7dSTom Wai-Hong Tam } __attribute__ ((__packed__)); 127d46b5f7dSTom Wai-Hong Tam 128d46b5f7dSTom Wai-Hong Tam struct edid1_info { 129d46b5f7dSTom Wai-Hong Tam unsigned char header[8]; 130d46b5f7dSTom Wai-Hong Tam unsigned char manufacturer_name[2]; 131d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_MANUFACTURER_NAME_ZERO(_x) \ 132d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).manufacturer_name[0]), 7) 133d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_MANUFACTURER_NAME_CHAR1(_x) \ 134d46b5f7dSTom Wai-Hong Tam GET_BITS(((_x).manufacturer_name[0]), 6, 2) 135d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_MANUFACTURER_NAME_CHAR2(_x) \ 136d46b5f7dSTom Wai-Hong Tam ((GET_BITS(((_x).manufacturer_name[0]), 1, 0) << 3) + \ 137d46b5f7dSTom Wai-Hong Tam GET_BITS(((_x).manufacturer_name[1]), 7, 5)) 138d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_MANUFACTURER_NAME_CHAR3(_x) \ 139d46b5f7dSTom Wai-Hong Tam GET_BITS(((_x).manufacturer_name[1]), 4, 0) 140d46b5f7dSTom Wai-Hong Tam unsigned char product_code[2]; 141d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_PRODUCT_CODE(_x) \ 142d46b5f7dSTom Wai-Hong Tam (((uint16_t)(_x).product_code[1] << 8) + (_x).product_code[0]) 143d46b5f7dSTom Wai-Hong Tam unsigned char serial_number[4]; 144d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_SERIAL_NUMBER(_x) \ 145d46b5f7dSTom Wai-Hong Tam (((uint32_t)(_x).serial_number[3] << 24) + \ 146d46b5f7dSTom Wai-Hong Tam ((_x).serial_number[2] << 16) + ((_x).serial_number[1] << 8) + \ 147d46b5f7dSTom Wai-Hong Tam (_x).serial_number[0]) 148d46b5f7dSTom Wai-Hong Tam unsigned char week; 149d46b5f7dSTom Wai-Hong Tam unsigned char year; 150d46b5f7dSTom Wai-Hong Tam unsigned char version; 151d46b5f7dSTom Wai-Hong Tam unsigned char revision; 152d46b5f7dSTom Wai-Hong Tam unsigned char video_input_definition; 153d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_VIDEO_INPUT_DIGITAL(_x) \ 154d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).video_input_definition), 7) 155d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(_x) \ 156d46b5f7dSTom Wai-Hong Tam GET_BITS(((_x).video_input_definition), 6, 5) 157d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(_x) \ 158d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).video_input_definition), 4) 159d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(_x) \ 160d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).video_input_definition), 3) 161d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(_x) \ 162d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).video_input_definition), 2) 163d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(_x) \ 164d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).video_input_definition), 1) 165d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_VIDEO_INPUT_SERRATION_V(_x) \ 166d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).video_input_definition), 0) 167d46b5f7dSTom Wai-Hong Tam unsigned char max_size_horizontal; 168d46b5f7dSTom Wai-Hong Tam unsigned char max_size_vertical; 169d46b5f7dSTom Wai-Hong Tam unsigned char gamma; 170d46b5f7dSTom Wai-Hong Tam unsigned char feature_support; 171d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_FEATURE_STANDBY(_x) \ 172d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).feature_support), 7) 173d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_FEATURE_SUSPEND(_x) \ 174d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).feature_support), 6) 175d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_FEATURE_ACTIVE_OFF(_x) \ 176d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).feature_support), 5) 177d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_FEATURE_DISPLAY_TYPE(_x) \ 178d46b5f7dSTom Wai-Hong Tam GET_BITS(((_x).feature_support), 4, 3) 179d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_FEATURE_RGB(_x) \ 180d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).feature_support), 2) 181d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(_x) \ 182d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).feature_support), 1) 183d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_FEATURE_DEFAULT_GTF_SUPPORT(_x) \ 184d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).feature_support), 0) 185d46b5f7dSTom Wai-Hong Tam unsigned char color_characteristics[10]; 186d46b5f7dSTom Wai-Hong Tam unsigned char established_timings[3]; 187d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_720X400_70(_x) \ 188d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 7) 189d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_720X400_88(_x) \ 190d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 6) 191d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_640X480_60(_x) \ 192d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 5) 193d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_640X480_67(_x) \ 194d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 4) 195d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_640X480_72(_x) \ 196d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 3) 197d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_640X480_75(_x) \ 198d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 2) 199d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_800X600_56(_x) \ 200d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 1) 201d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_800X600_60(_x) \ 202d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[0]), 0) 203d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_800X600_72(_x) \ 204d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 7) 205d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_800X600_75(_x) \ 206d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 6) 207d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_832X624_75(_x) \ 208d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 5) 209d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(_x) \ 210d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 4) 211d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(_x) \ 212d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 3) 213d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(_x) \ 214d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 2) 215d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(_x) \ 216d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 1) 217d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(_x) \ 218d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[1]), 0) 219d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(_x) \ 220d46b5f7dSTom Wai-Hong Tam GET_BIT(((_x).established_timings[2]), 7) 221d46b5f7dSTom Wai-Hong Tam struct { 222d46b5f7dSTom Wai-Hong Tam unsigned char xresolution; 223d46b5f7dSTom Wai-Hong Tam unsigned char aspect_vfreq; 224d46b5f7dSTom Wai-Hong Tam } __attribute__((__packed__)) standard_timings[8]; 225d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_STANDARD_TIMING_XRESOLUTION(_x, _i) \ 226d46b5f7dSTom Wai-Hong Tam (((_x).standard_timings[_i]).xresolution) 227d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_STANDARD_TIMING_ASPECT(_x, _i) \ 228d46b5f7dSTom Wai-Hong Tam GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 7, 6) 229d46b5f7dSTom Wai-Hong Tam #define EDID1_INFO_STANDARD_TIMING_VFREQ(_x, _i) \ 230d46b5f7dSTom Wai-Hong Tam GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 5, 0) 231d46b5f7dSTom Wai-Hong Tam union { 232d46b5f7dSTom Wai-Hong Tam unsigned char timing[72]; 233d46b5f7dSTom Wai-Hong Tam struct edid_monitor_descriptor descriptor[4]; 234d46b5f7dSTom Wai-Hong Tam } monitor_details; 235d46b5f7dSTom Wai-Hong Tam unsigned char extension_flag; 236d46b5f7dSTom Wai-Hong Tam unsigned char checksum; 237d46b5f7dSTom Wai-Hong Tam } __attribute__ ((__packed__)); 238d46b5f7dSTom Wai-Hong Tam 23943c6bdd0SJernej Skrabec enum edid_cea861_db_types { 24043c6bdd0SJernej Skrabec EDID_CEA861_DB_AUDIO = 0x01, 24143c6bdd0SJernej Skrabec EDID_CEA861_DB_VIDEO = 0x02, 24243c6bdd0SJernej Skrabec EDID_CEA861_DB_VENDOR = 0x03, 24343c6bdd0SJernej Skrabec EDID_CEA861_DB_SPEAKER = 0x04, 24443c6bdd0SJernej Skrabec }; 24543c6bdd0SJernej Skrabec 246d2fabdc7SHans de Goede struct edid_cea861_info { 247d2fabdc7SHans de Goede unsigned char extension_tag; 248d2fabdc7SHans de Goede #define EDID_CEA861_EXTENSION_TAG 0x02 249d2fabdc7SHans de Goede unsigned char revision; 250d2fabdc7SHans de Goede unsigned char dtd_offset; 251d2fabdc7SHans de Goede unsigned char dtd_count; 252d2fabdc7SHans de Goede #define EDID_CEA861_SUPPORTS_UNDERSCAN(_x) \ 253d2fabdc7SHans de Goede GET_BIT(((_x).dtd_count), 7) 254d2fabdc7SHans de Goede #define EDID_CEA861_SUPPORTS_BASIC_AUDIO(_x) \ 255d2fabdc7SHans de Goede GET_BIT(((_x).dtd_count), 6) 256d2fabdc7SHans de Goede #define EDID_CEA861_SUPPORTS_YUV444(_x) \ 257d2fabdc7SHans de Goede GET_BIT(((_x).dtd_count), 5) 258d2fabdc7SHans de Goede #define EDID_CEA861_SUPPORTS_YUV422(_x) \ 259d2fabdc7SHans de Goede GET_BIT(((_x).dtd_count), 4) 260d2fabdc7SHans de Goede #define EDID_CEA861_DTD_COUNT(_x) \ 261d2fabdc7SHans de Goede GET_BITS(((_x).dtd_count), 3, 0) 262d2fabdc7SHans de Goede unsigned char data[124]; 26343c6bdd0SJernej Skrabec #define EDID_CEA861_DB_TYPE(_x, offset) \ 26443c6bdd0SJernej Skrabec GET_BITS((_x).data[offset], 7, 5) 26543c6bdd0SJernej Skrabec #define EDID_CEA861_DB_LEN(_x, offset) \ 26643c6bdd0SJernej Skrabec GET_BITS((_x).data[offset], 4, 0) 267d2fabdc7SHans de Goede } __attribute__ ((__packed__)); 268d2fabdc7SHans de Goede 269d46b5f7dSTom Wai-Hong Tam /** 270d46b5f7dSTom Wai-Hong Tam * Print the EDID info. 271d46b5f7dSTom Wai-Hong Tam * 272d46b5f7dSTom Wai-Hong Tam * @param edid_info The EDID info to be printed 273d46b5f7dSTom Wai-Hong Tam */ 274d46b5f7dSTom Wai-Hong Tam void edid_print_info(struct edid1_info *edid_info); 275d46b5f7dSTom Wai-Hong Tam 276d46b5f7dSTom Wai-Hong Tam /** 277d46b5f7dSTom Wai-Hong Tam * Check the EDID info. 278d46b5f7dSTom Wai-Hong Tam * 279d46b5f7dSTom Wai-Hong Tam * @param info The EDID info to be checked 280d46b5f7dSTom Wai-Hong Tam * @return 0 on valid, or -1 on invalid 281d46b5f7dSTom Wai-Hong Tam */ 282d46b5f7dSTom Wai-Hong Tam int edid_check_info(struct edid1_info *info); 283d46b5f7dSTom Wai-Hong Tam 284d46b5f7dSTom Wai-Hong Tam /** 285e745d064SHans de Goede * Check checksum of a 128 bytes EDID data block 286e745d064SHans de Goede * 287e745d064SHans de Goede * @param edid_block EDID block data 288e745d064SHans de Goede * 289e745d064SHans de Goede * @return 0 on success, or a negative errno on error 290e745d064SHans de Goede */ 291e745d064SHans de Goede int edid_check_checksum(u8 *edid_block); 292e745d064SHans de Goede 293e745d064SHans de Goede /** 294d46b5f7dSTom Wai-Hong Tam * Get the horizontal and vertical rate ranges of the monitor. 295d46b5f7dSTom Wai-Hong Tam * 296d46b5f7dSTom Wai-Hong Tam * @param edid The EDID info 297d46b5f7dSTom Wai-Hong Tam * @param hmin Returns the minimum horizontal rate 298d46b5f7dSTom Wai-Hong Tam * @param hmax Returns the maxium horizontal rate 299d46b5f7dSTom Wai-Hong Tam * @param vmin Returns the minimum vertical rate 300d46b5f7dSTom Wai-Hong Tam * @param vmax Returns the maxium vertical rate 301d46b5f7dSTom Wai-Hong Tam * @return 0 on success, or -1 on error 302d46b5f7dSTom Wai-Hong Tam */ 303d46b5f7dSTom Wai-Hong Tam int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin, 304d46b5f7dSTom Wai-Hong Tam unsigned int *hmax, unsigned int *vmin, 305d46b5f7dSTom Wai-Hong Tam unsigned int *vmax); 306d46b5f7dSTom Wai-Hong Tam 30700cf1167SSimon Glass struct display_timing; 30800cf1167SSimon Glass 30900cf1167SSimon Glass /** 31000cf1167SSimon Glass * edid_get_timing() - Get basic digital display parameters 31100cf1167SSimon Glass * 31200cf1167SSimon Glass * @param buf Buffer containing EDID data 31300cf1167SSimon Glass * @param buf_size Size of buffer in bytes 31400cf1167SSimon Glass * @param timing Place to put preferring timing information 31500cf1167SSimon Glass * @param panel_bits_per_colourp Place to put the number of bits per 31600cf1167SSimon Glass * colour supported by the panel. This will be set to 31700cf1167SSimon Glass * -1 if not available 31800cf1167SSimon Glass * @return 0 if timings are OK, -ve on error 31900cf1167SSimon Glass */ 32000cf1167SSimon Glass int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing, 32100cf1167SSimon Glass int *panel_bits_per_colourp); 32200cf1167SSimon Glass 323d46b5f7dSTom Wai-Hong Tam #endif /* __EDID_H_ */ 324