headers/private/graphics/common/edid.h

   1 /*
   2  * Copyright 2003, Thomas Kurschel. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _EDID_H
   6 #define _EDID_H
   7
   8 //!     Extended Display Identification Data (EDID)
   9
  10 #include "edid_raw.h"
  11
  12
  13 // vendor info
  14 typedef struct {
  15         char manufacturer[4];
  16         uint16 prod_id;
  17         uint32 serial;
  18         uint8 week;
  19         uint16 year;
  20 } edid1_vendor;
  21
  22 // version info
  23 typedef struct {
  24         uint8 version;
  25         uint8 revision;
  26 } edid1_version;
  27
  28 // display info
  29 typedef struct {
  30         BBITFIELD8_7 (
  31                 input_type : 1,         // 1 : digital
  32                 input_voltage : 2,      // 0=0.7V/0.3V, 1=0.714V/0.286,
  33                                                         // 2=1V/0.4V, 3=0.7V/0V
  34                 setup : 1,                      // true if voltage configurable
  35                 sep_sync : 1,
  36                 comp_sync : 1,
  37                 sync_on_green : 1,
  38                 sync_serr : 1
  39         );
  40         uint8 h_size;
  41         uint8 v_size;
  42         uint8 gamma;    // (x+100)/100
  43         BBITFIELD8_7 (
  44                 dpms_standby : 1,
  45                 dpms_suspend : 1,
  46                 dpms_off : 1,
  47                 display_type : 2,       // 0=mono, 1=rgb, 2=multicolour
  48                 // since EDID version 1.1
  49                 std_colour_space : 1,
  50                 preferred_timing_mode : 1,
  51                 gtf_supported : 1
  52         );
  53         uint16 red_x;           // all colours are 0.10 fixed point
  54         uint16 red_y;
  55         uint16 green_x;
  56         uint16 green_y;
  57         uint16 blue_x;
  58         uint16 blue_y;
  59         uint16 white_x;
  60         uint16 white_y;
  61 } edid1_display;
  62
  63 // standard timing data
  64 typedef struct {
  65         uint16 h_size;
  66         uint16 v_size;
  67         uint16 id;
  68         uint8 ratio;
  69         uint8 refresh;
  70 } edid1_std_timing;
  71
  72 // additional whitepoint
  73 typedef struct {
  74         uint8 index;
  75         uint16 white_x;
  76         uint16 white_y;
  77         uint8 gamma;    // (x+100)/100
  78 } edid1_whitepoint;
  79
  80 // detailed timing description
  81 typedef struct {
  82         uint16 pixel_clock; // in 10 kHz
  83         uint16 h_active;
  84         uint16 h_blank;
  85         uint16 v_active;
  86         uint16 v_blank;
  87         uint16 h_sync_off;
  88         uint16 h_sync_width;
  89         uint16 v_sync_off;
  90         uint16 v_sync_width;
  91         uint16 h_size;
  92         uint16 v_size;
  93         uint16 h_border;
  94         uint16 v_border;
  95         BBITFIELD8_4 (
  96                 interlaced : 1,
  97                 stereo : 2,             // upper bit set - left on sync
  98                                                 // lower bit set - right on sync
  99                 sync : 2,
 100                 misc : 2
 101         );
 102 } edid1_detailed_timing;
 103
 104 // detailed monitor description
 105 typedef struct {
 106         uint8 monitor_desc_type;
 107         union {
 108                 char serial_number[EDID1_EXTRA_STRING_LEN];
 109                 char ascii_data[EDID1_EXTRA_STRING_LEN];
 110                 edid1_monitor_range monitor_range;
 111                 char monitor_name[EDID1_EXTRA_STRING_LEN];
 112                 edid1_whitepoint whitepoint[EDID1_NUM_EXTRA_WHITEPOINTS];
 113                 edid1_std_timing std_timing[EDID1_NUM_EXTRA_STD_TIMING];
 114                 edid1_detailed_timing detailed_timing;
 115         } data;
 116 } edid1_detailed_monitor;
 117
 118 // EDID data block
 119 typedef struct edid1_info {
 120         edid1_vendor vendor;
 121         edid1_version version;
 122         edid1_display display;
 123         edid1_established_timing established_timing;
 124         edid1_std_timing std_timing[EDID1_NUM_STD_TIMING];
 125
 126         // since EDID version 1.2
 127         edid1_detailed_monitor detailed_monitor[EDID1_NUM_DETAILED_MONITOR_DESC];
 128
 129         uint8 num_sections;
 130 } edid1_info;
 131
 132 #define EDID_VERSION_1 1
 133
 134 #ifdef __cplusplus
 135 extern "C" {
 136 #endif
 137
 138 void edid_decode(edid1_info *edid, const edid1_raw *raw);
 139 void edid_dump(edid1_info *edid);
 140
 141 #ifdef __cplusplus
 142 }
 143 #endif
 144
 145 #endif  // _EDID_H