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/*
edid.S: EDID data template
Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* Manufacturer */
#define MFG_LNX1 'L'
#define MFG_LNX2 'N'
#define MFG_LNX3 'X'
#define SERIAL 0
#define YEAR 2012
#define WEEK 5
/* EDID 1.3 standard definitions */
#define XY_RATIO_16_10 0b00
#define XY_RATIO_4_3 0b01
#define XY_RATIO_5_4 0b10
#define XY_RATIO_16_9 0b11
/* Provide defaults for the timing bits */
#ifndef ESTABLISHED_TIMING1_BITS
#define ESTABLISHED_TIMING1_BITS 0x00
#endif
#ifndef ESTABLISHED_TIMING2_BITS
#define ESTABLISHED_TIMING2_BITS 0x00
#endif
#ifndef ESTABLISHED_TIMING3_BITS
#define ESTABLISHED_TIMING3_BITS 0x00
#endif
#define mfgname2id(v1,v2,v3) \
((((v1-'@')&0x1f)<<10)+(((v2-'@')&0x1f)<<5)+((v3-'@')&0x1f))
#define swap16(v1) ((v1>>8)+((v1&0xff)<<8))
#define lsbs2(v1,v2) (((v1&0x0f)<<4)+(v2&0x0f))
#define msbs2(v1,v2) ((((v1>>8)&0x0f)<<4)+((v2>>8)&0x0f))
#define msbs4(v1,v2,v3,v4) \
((((v1>>8)&0x03)<<6)+(((v2>>8)&0x03)<<4)+\
(((v3>>4)&0x03)<<2)+((v4>>4)&0x03))
#define pixdpi2mm(pix,dpi) ((pix*25)/dpi)
#define xsize pixdpi2mm(XPIX,DPI)
#define ysize pixdpi2mm(YPIX,DPI)
.data
/* Fixed header pattern */
header: .byte 0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x00
mfg_id: .hword swap16(mfgname2id(MFG_LNX1, MFG_LNX2, MFG_LNX3))
prod_code: .hword 0
/* Serial number. 32 bits, little endian. */
serial_number: .long SERIAL
/* Week of manufacture */
week: .byte WEEK
/* Year of manufacture, less 1990. (1990-2245)
If week=255, it is the model year instead */
year: .byte YEAR-1990
version: .byte VERSION /* EDID version, usually 1 (for 1.3) */
revision: .byte REVISION /* EDID revision, usually 3 (for 1.3) */
/* If Bit 7=1 Digital input. If set, the following bit definitions apply:
Bits 6-1 Reserved, must be 0
Bit 0 Signal is compatible with VESA DFP 1.x TMDS CRGB,
1 pixel per clock, up to 8 bits per color, MSB aligned,
If Bit 7=0 Analog input. If clear, the following bit definitions apply:
Bits 6-5 Video white and sync levels, relative to blank
00=+0.7/-0.3 V; 01=+0.714/-0.286 V;
10=+1.0/-0.4 V; 11=+0.7/0 V
Bit 4 Blank-to-black setup (pedestal) expected
Bit 3 Separate sync supported
Bit 2 Composite sync (on HSync) supported
Bit 1 Sync on green supported
Bit 0 VSync pulse must be serrated when somposite or
sync-on-green is used. */
video_parms: .byte 0x6d
/* Maximum horizontal image size, in centimetres
(max 292 cm/115 in at 16:9 aspect ratio) */
max_hor_size: .byte xsize/10
/* Maximum vertical image size, in centimetres.
If either byte is 0, undefined (e.g. projector) */
max_vert_size: .byte ysize/10
/* Display gamma, minus 1, times 100 (range 1.00-3.5 */
gamma: .byte 120
/* Bit 7 DPMS standby supported
Bit 6 DPMS suspend supported
Bit 5 DPMS active-off supported
Bits 4-3 Display type: 00=monochrome; 01=RGB colour;
10=non-RGB multicolour; 11=undefined
Bit 2 Standard sRGB colour space. Bytes 25-34 must contain
sRGB standard values.
Bit 1 Preferred timing mode specified in descriptor block 1.
Bit 0 GTF supported with default parameter values. */
dsp_features: .byte 0xea
/* Chromaticity coordinates. */
/* Red and green least-significant bits
Bits 7-6 Red x value least-significant 2 bits
Bits 5-4 Red y value least-significant 2 bits
Bits 3-2 Green x value lst-significant 2 bits
Bits 1-0 Green y value least-significant 2 bits */
red_green_lsb: .byte 0x5e
/* Blue and white least-significant 2 bits */
blue_white_lsb: .byte 0xc0
/* Red x value most significant 8 bits.
0-255 encodes 0-0.996 (255/256); 0-0.999 (1023/1024) with lsbits */
red_x_msb: .byte 0xa4
/* Red y value most significant 8 bits */
red_y_msb: .byte 0x59
/* Green x and y value most significant 8 bits */
green_x_y_msb: .byte 0x4a,0x98
/* Blue x and y value most significant 8 bits */
blue_x_y_msb: .byte 0x25,0x20
/* Default white point x and y value most significant 8 bits */
white_x_y_msb: .byte 0x50,0x54
/* Established timings */
/* Bit 7 720x400 @ 70 Hz
Bit 6 720x400 @ 88 Hz
Bit 5 640x480 @ 60 Hz
Bit 4 640x480 @ 67 Hz
Bit 3 640x480 @ 72 Hz
Bit 2 640x480 @ 75 Hz
Bit 1 800x600 @ 56 Hz
Bit 0 800x600 @ 60 Hz */
estbl_timing1: .byte ESTABLISHED_TIMING1_BITS
/* Bit 7 800x600 @ 72 Hz
Bit 6 800x600 @ 75 Hz
Bit 5 832x624 @ 75 Hz
Bit 4 1024x768 @ 87 Hz, interlaced (1024x768)
Bit 3 1024x768 @ 60 Hz
Bit 2 1024x768 @ 72 Hz
Bit 1 1024x768 @ 75 Hz
Bit 0 1280x1024 @ 75 Hz */
estbl_timing2: .byte ESTABLISHED_TIMING2_BITS
/* Bit 7 1152x870 @ 75 Hz (Apple Macintosh II)
Bits 6-0 Other manufacturer-specific display mod */
estbl_timing3: .byte ESTABLISHED_TIMING3_BITS
/* Standard timing */
/* X resolution, less 31, divided by 8 (256-2288 pixels) */
std_xres: .byte (XPIX/8)-31
/* Y resolution, X:Y pixel ratio
Bits 7-6 X:Y pixel ratio: 00=16:10; 01=4:3; 10=5:4; 11=16:9.
Bits 5-0 Vertical frequency, less 60 (60-123 Hz) */
std_vres: .byte (XY_RATIO<<6)+VFREQ-60
.fill 7,2,0x0101
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