video/fbdev/edid.h

0001 /*
0002  * drivers/video/edid.h - EDID/DDC Header
0003  *
0004  * Based on:
0005  *   1. XFree86 4.3.0, edid.h
0006  *      Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
0007  *
0008  *   2. John Fremlin <vii@users.sourceforge.net> and
0009  *      Ani Joshi <ajoshi@unixbox.com>
0010  *
0011  * DDC is a Trademark of VESA (Video Electronics Standard Association).
0012  *
0013  * This file is subject to the terms and conditions of the GNU General Public
0014  * License.  See the file COPYING in the main directory of this archive
0015  * for more details.
0016 */
0017
0018 #ifndef __EDID_H__
0019 #define __EDID_H__
0020
0021 #define EDID_LENGTH             0x80
0022 #define EDID_HEADER             0x00
0023 #define EDID_HEADER_END             0x07
0024
0025 #define ID_MANUFACTURER_NAME            0x08
0026 #define ID_MANUFACTURER_NAME_END        0x09
0027 #define ID_MODEL                0x0a
0028
0029 #define ID_SERIAL_NUMBER            0x0c
0030
0031 #define MANUFACTURE_WEEK            0x10
0032 #define MANUFACTURE_YEAR            0x11
0033
0034 #define EDID_STRUCT_VERSION         0x12
0035 #define EDID_STRUCT_REVISION            0x13
0036
0037 #define EDID_STRUCT_DISPLAY                     0x14
0038
0039 #define DPMS_FLAGS              0x18
0040 #define ESTABLISHED_TIMING_1            0x23
0041 #define ESTABLISHED_TIMING_2            0x24
0042 #define MANUFACTURERS_TIMINGS           0x25
0043
0044 /* standard timings supported */
0045 #define STD_TIMING                              8
0046 #define STD_TIMING_DESCRIPTION_SIZE             2
0047 #define STD_TIMING_DESCRIPTIONS_START           0x26
0048
0049 #define DETAILED_TIMING_DESCRIPTIONS_START  0x36
0050 #define DETAILED_TIMING_DESCRIPTION_SIZE    18
0051 #define NO_DETAILED_TIMING_DESCRIPTIONS     4
0052
0053 #define DETAILED_TIMING_DESCRIPTION_1       0x36
0054 #define DETAILED_TIMING_DESCRIPTION_2       0x48
0055 #define DETAILED_TIMING_DESCRIPTION_3       0x5a
0056 #define DETAILED_TIMING_DESCRIPTION_4       0x6c
0057
0058 #define DESCRIPTOR_DATA             5
0059
0060 #define UPPER_NIBBLE( x ) \
0061         (((128|64|32|16) & (x)) >> 4)
0062
0063 #define LOWER_NIBBLE( x ) \
0064         ((1|2|4|8) & (x))
0065
0066 #define COMBINE_HI_8LO( hi, lo ) \
0067         ( (((unsigned)hi) << 8) | (unsigned)lo )
0068
0069 #define COMBINE_HI_4LO( hi, lo ) \
0070         ( (((unsigned)hi) << 4) | (unsigned)lo )
0071
0072 #define PIXEL_CLOCK_LO     (unsigned)block[ 0 ]
0073 #define PIXEL_CLOCK_HI     (unsigned)block[ 1 ]
0074 #define PIXEL_CLOCK    (COMBINE_HI_8LO( PIXEL_CLOCK_HI,PIXEL_CLOCK_LO )*10000)
0075 #define H_ACTIVE_LO        (unsigned)block[ 2 ]
0076 #define H_BLANKING_LO      (unsigned)block[ 3 ]
0077 #define H_ACTIVE_HI        UPPER_NIBBLE( (unsigned)block[ 4 ] )
0078 #define H_ACTIVE           COMBINE_HI_8LO( H_ACTIVE_HI, H_ACTIVE_LO )
0079 #define H_BLANKING_HI      LOWER_NIBBLE( (unsigned)block[ 4 ] )
0080 #define H_BLANKING         COMBINE_HI_8LO( H_BLANKING_HI, H_BLANKING_LO )
0081
0082 #define V_ACTIVE_LO        (unsigned)block[ 5 ]
0083 #define V_BLANKING_LO      (unsigned)block[ 6 ]
0084 #define V_ACTIVE_HI        UPPER_NIBBLE( (unsigned)block[ 7 ] )
0085 #define V_ACTIVE           COMBINE_HI_8LO( V_ACTIVE_HI, V_ACTIVE_LO )
0086 #define V_BLANKING_HI      LOWER_NIBBLE( (unsigned)block[ 7 ] )
0087 #define V_BLANKING         COMBINE_HI_8LO( V_BLANKING_HI, V_BLANKING_LO )
0088
0089 #define H_SYNC_OFFSET_LO   (unsigned)block[ 8 ]
0090 #define H_SYNC_WIDTH_LO    (unsigned)block[ 9 ]
0091
0092 #define V_SYNC_OFFSET_LO   UPPER_NIBBLE( (unsigned)block[ 10 ] )
0093 #define V_SYNC_WIDTH_LO    LOWER_NIBBLE( (unsigned)block[ 10 ] )
0094
0095 #define V_SYNC_WIDTH_HI    ((unsigned)block[ 11 ] & (1|2))
0096 #define V_SYNC_OFFSET_HI   (((unsigned)block[ 11 ] & (4|8)) >> 2)
0097
0098 #define H_SYNC_WIDTH_HI    (((unsigned)block[ 11 ] & (16|32)) >> 4)
0099 #define H_SYNC_OFFSET_HI   (((unsigned)block[ 11 ] & (64|128)) >> 6)
0100
0101 #define V_SYNC_WIDTH       COMBINE_HI_4LO( V_SYNC_WIDTH_HI, V_SYNC_WIDTH_LO )
0102 #define V_SYNC_OFFSET      COMBINE_HI_4LO( V_SYNC_OFFSET_HI, V_SYNC_OFFSET_LO )
0103
0104 #define H_SYNC_WIDTH       COMBINE_HI_8LO( H_SYNC_WIDTH_HI, H_SYNC_WIDTH_LO )
0105 #define H_SYNC_OFFSET      COMBINE_HI_8LO( H_SYNC_OFFSET_HI, H_SYNC_OFFSET_LO )
0106
0107 #define H_SIZE_LO          (unsigned)block[ 12 ]
0108 #define V_SIZE_LO          (unsigned)block[ 13 ]
0109
0110 #define H_SIZE_HI          UPPER_NIBBLE( (unsigned)block[ 14 ] )
0111 #define V_SIZE_HI          LOWER_NIBBLE( (unsigned)block[ 14 ] )
0112
0113 #define H_SIZE             COMBINE_HI_8LO( H_SIZE_HI, H_SIZE_LO )
0114 #define V_SIZE             COMBINE_HI_8LO( V_SIZE_HI, V_SIZE_LO )
0115
0116 #define H_BORDER           (unsigned)block[ 15 ]
0117 #define V_BORDER           (unsigned)block[ 16 ]
0118
0119 #define FLAGS              (unsigned)block[ 17 ]
0120
0121 #define INTERLACED         (FLAGS&128)
0122 #define SYNC_TYPE          (FLAGS&3<<3) /* bits 4,3 */
0123 #define SYNC_SEPARATE      (3<<3)
0124 #define HSYNC_POSITIVE     (FLAGS & 4)
0125 #define VSYNC_POSITIVE     (FLAGS & 2)
0126
0127 #define V_MIN_RATE              block[ 5 ]
0128 #define V_MAX_RATE              block[ 6 ]
0129 #define H_MIN_RATE              block[ 7 ]
0130 #define H_MAX_RATE              block[ 8 ]
0131 #define MAX_PIXEL_CLOCK         (((int)block[ 9 ]) * 10)
0132 #define GTF_SUPPORT     block[10]
0133
0134 #define DPMS_ACTIVE_OFF     (1 << 5)
0135 #define DPMS_SUSPEND        (1 << 6)
0136 #define DPMS_STANDBY        (1 << 7)
0137
0138 #endif /* __EDID_H__ */