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   1 /*
   2  * drivers/video/edid.h - EDID/DDC Header
   3  *
   4  * Based on:
   5  *   1. XFree86 4.3.0, edid.h
   6  *      Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
   7  *
   8  *   2. John Fremlin <vii@users.sourceforge.net> and
   9  *      Ani Joshi <ajoshi@unixbox.com>
  10  *
  11  * DDC is a Trademark of VESA (Video Electronics Standard Association).
  12  *
  13  * This file is subject to the terms and conditions of the GNU General Public
  14  * License.  See the file COPYING in the main directory of this archive
  15  * for more details.
  16 */
  17
  18 #ifndef __EDID_H__
  19 #define __EDID_H__
  20
  21 #define EDID_LENGTH                             0x80
  22 #define EDID_HEADER                             0x00
  23 #define EDID_HEADER_END                         0x07
  24
  25 #define ID_MANUFACTURER_NAME                    0x08
  26 #define ID_MANUFACTURER_NAME_END                0x09
  27 #define ID_MODEL                                0x0a
  28
  29 #define ID_SERIAL_NUMBER                        0x0c
  30
  31 #define MANUFACTURE_WEEK                        0x10
  32 #define MANUFACTURE_YEAR                        0x11
  33
  34 #define EDID_STRUCT_VERSION                     0x12
  35 #define EDID_STRUCT_REVISION                    0x13
  36
  37 #define EDID_STRUCT_DISPLAY                     0x14
  38
  39 #define DPMS_FLAGS                              0x18
  40 #define ESTABLISHED_TIMING_1                    0x23
  41 #define ESTABLISHED_TIMING_2                    0x24
  42 #define MANUFACTURERS_TIMINGS                   0x25
  43
  44 /* standard timings supported */
  45 #define STD_TIMING                              8
  46 #define STD_TIMING_DESCRIPTION_SIZE             2
  47 #define STD_TIMING_DESCRIPTIONS_START           0x26
  48
  49 #define DETAILED_TIMING_DESCRIPTIONS_START      0x36
  50 #define DETAILED_TIMING_DESCRIPTION_SIZE        18
  51 #define NO_DETAILED_TIMING_DESCRIPTIONS         4
  52
  53 #define DETAILED_TIMING_DESCRIPTION_1           0x36
  54 #define DETAILED_TIMING_DESCRIPTION_2           0x48
  55 #define DETAILED_TIMING_DESCRIPTION_3           0x5a
  56 #define DETAILED_TIMING_DESCRIPTION_4           0x6c
  57
  58 #define DESCRIPTOR_DATA                         5
  59
  60 #define UPPER_NIBBLE( x ) \
  61         (((128|64|32|16) & (x)) >> 4)
  62
  63 #define LOWER_NIBBLE( x ) \
  64         ((1|2|4|8) & (x))
  65
  66 #define COMBINE_HI_8LO( hi, lo ) \
  67         ( (((unsigned)hi) << 8) | (unsigned)lo )
  68
  69 #define COMBINE_HI_4LO( hi, lo ) \
  70         ( (((unsigned)hi) << 4) | (unsigned)lo )
  71
  72 #define PIXEL_CLOCK_LO     (unsigned)block[ 0 ]
  73 #define PIXEL_CLOCK_HI     (unsigned)block[ 1 ]
  74 #define PIXEL_CLOCK        (COMBINE_HI_8LO( PIXEL_CLOCK_HI,PIXEL_CLOCK_LO )*10000)
  75 #define H_ACTIVE_LO        (unsigned)block[ 2 ]
  76 #define H_BLANKING_LO      (unsigned)block[ 3 ]
  77 #define H_ACTIVE_HI        UPPER_NIBBLE( (unsigned)block[ 4 ] )
  78 #define H_ACTIVE           COMBINE_HI_8LO( H_ACTIVE_HI, H_ACTIVE_LO )
  79 #define H_BLANKING_HI      LOWER_NIBBLE( (unsigned)block[ 4 ] )
  80 #define H_BLANKING         COMBINE_HI_8LO( H_BLANKING_HI, H_BLANKING_LO )
  81
  82 #define V_ACTIVE_LO        (unsigned)block[ 5 ]
  83 #define V_BLANKING_LO      (unsigned)block[ 6 ]
  84 #define V_ACTIVE_HI        UPPER_NIBBLE( (unsigned)block[ 7 ] )
  85 #define V_ACTIVE           COMBINE_HI_8LO( V_ACTIVE_HI, V_ACTIVE_LO )
  86 #define V_BLANKING_HI      LOWER_NIBBLE( (unsigned)block[ 7 ] )
  87 #define V_BLANKING         COMBINE_HI_8LO( V_BLANKING_HI, V_BLANKING_LO )
  88
  89 #define H_SYNC_OFFSET_LO   (unsigned)block[ 8 ]
  90 #define H_SYNC_WIDTH_LO    (unsigned)block[ 9 ]
  91
  92 #define V_SYNC_OFFSET_LO   UPPER_NIBBLE( (unsigned)block[ 10 ] )
  93 #define V_SYNC_WIDTH_LO    LOWER_NIBBLE( (unsigned)block[ 10 ] )
  94
  95 #define V_SYNC_WIDTH_HI    ((unsigned)block[ 11 ] & (1|2))
  96 #define V_SYNC_OFFSET_HI   (((unsigned)block[ 11 ] & (4|8)) >> 2)
  97
  98 #define H_SYNC_WIDTH_HI    (((unsigned)block[ 11 ] & (16|32)) >> 4)
  99 #define H_SYNC_OFFSET_HI   (((unsigned)block[ 11 ] & (64|128)) >> 6)
 100
 101 #define V_SYNC_WIDTH       COMBINE_HI_4LO( V_SYNC_WIDTH_HI, V_SYNC_WIDTH_LO )
 102 #define V_SYNC_OFFSET      COMBINE_HI_4LO( V_SYNC_OFFSET_HI, V_SYNC_OFFSET_LO )
 103
 104 #define H_SYNC_WIDTH       COMBINE_HI_4LO( H_SYNC_WIDTH_HI, H_SYNC_WIDTH_LO )
 105 #define H_SYNC_OFFSET      COMBINE_HI_4LO( H_SYNC_OFFSET_HI, H_SYNC_OFFSET_LO )
 106
 107 #define H_SIZE_LO          (unsigned)block[ 12 ]
 108 #define V_SIZE_LO          (unsigned)block[ 13 ]
 109
 110 #define H_SIZE_HI          UPPER_NIBBLE( (unsigned)block[ 14 ] )
 111 #define V_SIZE_HI          LOWER_NIBBLE( (unsigned)block[ 14 ] )
 112
 113 #define H_SIZE             COMBINE_HI_8LO( H_SIZE_HI, H_SIZE_LO )
 114 #define V_SIZE             COMBINE_HI_8LO( V_SIZE_HI, V_SIZE_LO )
 115
 116 #define H_BORDER           (unsigned)block[ 15 ]
 117 #define V_BORDER           (unsigned)block[ 16 ]
 118
 119 #define FLAGS              (unsigned)block[ 17 ]
 120
 121 #define INTERLACED         (FLAGS&128)
 122 #define SYNC_TYPE          (FLAGS&3<<3) /* bits 4,3 */
 123 #define SYNC_SEPARATE      (3<<3)
 124 #define HSYNC_POSITIVE     (FLAGS & 4)
 125 #define VSYNC_POSITIVE     (FLAGS & 2)
 126
 127 #define V_MIN_RATE              block[ 5 ]
 128 #define V_MAX_RATE              block[ 6 ]
 129 #define H_MIN_RATE              block[ 7 ]
 130 #define H_MAX_RATE              block[ 8 ]
 131 #define MAX_PIXEL_CLOCK         (((int)block[ 9 ]) * 10)
 132 #define GTF_SUPPORT             block[10]
 133
 134 #define DPMS_ACTIVE_OFF         (1 << 5)
 135 #define DPMS_SUSPEND            (1 << 6)
 136 #define DPMS_STANDBY            (1 << 7)
 137
 138 #endif /* __EDID_H__ */