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edid.h
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edid.h
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/*
* drivers/video/edid.h - EDID/DDC Header
*
* Based on:
* 1. XFree86 4.3.0, edid.h
* Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
*
* 2. John Fremlin <vii@users.sourceforge.net> and
* Ani Joshi <ajoshi@unixbox.com>
*
* DDC is a Trademark of VESA (Video Electronics Standard Association).
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#ifndef __EDID_H__
#define __EDID_H__
#define EDID_LENGTH 0x80
#define EDID_HEADER 0x00
#define EDID_HEADER_END 0x07
#define ID_MANUFACTURER_NAME 0x08
#define ID_MANUFACTURER_NAME_END 0x09
#define ID_MODEL 0x0a
#define ID_SERIAL_NUMBER 0x0c
#define MANUFACTURE_WEEK 0x10
#define MANUFACTURE_YEAR 0x11
#define EDID_STRUCT_VERSION 0x12
#define EDID_STRUCT_REVISION 0x13
#define EDID_STRUCT_DISPLAY 0x14
#define DPMS_FLAGS 0x18
#define ESTABLISHED_TIMING_1 0x23
#define ESTABLISHED_TIMING_2 0x24
#define MANUFACTURERS_TIMINGS 0x25
/* standard timings supported */
#define STD_TIMING 8
#define STD_TIMING_DESCRIPTION_SIZE 2
#define STD_TIMING_DESCRIPTIONS_START 0x26
#define DETAILED_TIMING_DESCRIPTIONS_START 0x36
#define DETAILED_TIMING_DESCRIPTION_SIZE 18
#define NO_DETAILED_TIMING_DESCRIPTIONS 4
#define DETAILED_TIMING_DESCRIPTION_1 0x36
#define DETAILED_TIMING_DESCRIPTION_2 0x48
#define DETAILED_TIMING_DESCRIPTION_3 0x5a
#define DETAILED_TIMING_DESCRIPTION_4 0x6c
#define DESCRIPTOR_DATA 5
#define UPPER_NIBBLE( x ) \
(((128|64|32|16) & (x)) >> 4)
#define LOWER_NIBBLE( x ) \
((1|2|4|8) & (x))
#define COMBINE_HI_8LO( hi, lo ) \
( (((unsigned)hi) << 8) | (unsigned)lo )
#define COMBINE_HI_4LO( hi, lo ) \
( (((unsigned)hi) << 4) | (unsigned)lo )
#define PIXEL_CLOCK_LO (unsigned)block[ 0 ]
#define PIXEL_CLOCK_HI (unsigned)block[ 1 ]
#define PIXEL_CLOCK (COMBINE_HI_8LO( PIXEL_CLOCK_HI,PIXEL_CLOCK_LO )*10000)
#define H_ACTIVE_LO (unsigned)block[ 2 ]
#define H_BLANKING_LO (unsigned)block[ 3 ]
#define H_ACTIVE_HI UPPER_NIBBLE( (unsigned)block[ 4 ] )
#define H_ACTIVE COMBINE_HI_8LO( H_ACTIVE_HI, H_ACTIVE_LO )
#define H_BLANKING_HI LOWER_NIBBLE( (unsigned)block[ 4 ] )
#define H_BLANKING COMBINE_HI_8LO( H_BLANKING_HI, H_BLANKING_LO )
#define V_ACTIVE_LO (unsigned)block[ 5 ]
#define V_BLANKING_LO (unsigned)block[ 6 ]
#define V_ACTIVE_HI UPPER_NIBBLE( (unsigned)block[ 7 ] )
#define V_ACTIVE COMBINE_HI_8LO( V_ACTIVE_HI, V_ACTIVE_LO )
#define V_BLANKING_HI LOWER_NIBBLE( (unsigned)block[ 7 ] )
#define V_BLANKING COMBINE_HI_8LO( V_BLANKING_HI, V_BLANKING_LO )
#define H_SYNC_OFFSET_LO (unsigned)block[ 8 ]
#define H_SYNC_WIDTH_LO (unsigned)block[ 9 ]
#define V_SYNC_OFFSET_LO UPPER_NIBBLE( (unsigned)block[ 10 ] )
#define V_SYNC_WIDTH_LO LOWER_NIBBLE( (unsigned)block[ 10 ] )
#define V_SYNC_WIDTH_HI ((unsigned)block[ 11 ] & (1|2))
#define V_SYNC_OFFSET_HI (((unsigned)block[ 11 ] & (4|8)) >> 2)
#define H_SYNC_WIDTH_HI (((unsigned)block[ 11 ] & (16|32)) >> 4)
#define H_SYNC_OFFSET_HI (((unsigned)block[ 11 ] & (64|128)) >> 6)
#define V_SYNC_WIDTH COMBINE_HI_4LO( V_SYNC_WIDTH_HI, V_SYNC_WIDTH_LO )
#define V_SYNC_OFFSET COMBINE_HI_4LO( V_SYNC_OFFSET_HI, V_SYNC_OFFSET_LO )
#define H_SYNC_WIDTH COMBINE_HI_8LO( H_SYNC_WIDTH_HI, H_SYNC_WIDTH_LO )
#define H_SYNC_OFFSET COMBINE_HI_8LO( H_SYNC_OFFSET_HI, H_SYNC_OFFSET_LO )
#define H_SIZE_LO (unsigned)block[ 12 ]
#define V_SIZE_LO (unsigned)block[ 13 ]
#define H_SIZE_HI UPPER_NIBBLE( (unsigned)block[ 14 ] )
#define V_SIZE_HI LOWER_NIBBLE( (unsigned)block[ 14 ] )
#define H_SIZE COMBINE_HI_8LO( H_SIZE_HI, H_SIZE_LO )
#define V_SIZE COMBINE_HI_8LO( V_SIZE_HI, V_SIZE_LO )
#define H_BORDER (unsigned)block[ 15 ]
#define V_BORDER (unsigned)block[ 16 ]
#define FLAGS (unsigned)block[ 17 ]
#define INTERLACED (FLAGS&128)
#define SYNC_TYPE (FLAGS&3<<3) /* bits 4,3 */
#define SYNC_SEPARATE (3<<3)
#define HSYNC_POSITIVE (FLAGS & 4)
#define VSYNC_POSITIVE (FLAGS & 2)
#define V_MIN_RATE block[ 5 ]
#define V_MAX_RATE block[ 6 ]
#define H_MIN_RATE block[ 7 ]
#define H_MAX_RATE block[ 8 ]
#define MAX_PIXEL_CLOCK (((int)block[ 9 ]) * 10)
#define GTF_SUPPORT block[10]
#define DPMS_ACTIVE_OFF (1 << 5)
#define DPMS_SUSPEND (1 << 6)
#define DPMS_STANDBY (1 << 7)
#endif /* __EDID_H__ */