edid.h

  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_8LO( H_SYNC_WIDTH_HI, H_SYNC_WIDTH_LO )
105#define H_SYNC_OFFSET      COMBINE_HI_8LO( 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__ */