aboutsummaryrefslogtreecommitdiff
path: root/Documentation/EDID/edid.S
blob: ea97ae275fca2fac741d04dc60cb0632faa70bbc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
/*
   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

#define mfgname2id(v1,v2,v3) \
	((((v1-'@')&0x1f)<<10)+(((v2-'@')&0x1f)<<5)+((v3-'@')&0x1f))
#define swap16(v1) ((v1>>8)+((v1&0xff)<<8))
#define msbs2(v1,v2) ((((v1>>8)&0x0f)<<4)+((v2>>8)&0x0f))
#define msbs4(v1,v2,v3,v4) \
	(((v1&0x03)>>2)+((v2&0x03)>>4)+((v3&0x03)>>6)+((v4&0x03)>>8))
#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:		.word	swap16(mfgname2id(MFG_LNX1, MFG_LNX2, MFG_LNX3))

prod_code:	.word	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	0x00

/* 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_TIMINGS_BITS

/* Bit 7	1152x870 @ 75 Hz (Apple Macintosh II)
   Bits 6-0 	Other manufacturer-specific display mod */
estbl_timing3:	.byte	0x00

/* 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	/* Unused */

descriptor1:
/* Pixel clock in 10 kHz units. (0.-655.35 MHz, little-endian) */
clock:		.word	CLOCK/10

/* Horizontal active pixels 8 lsbits (0-4095) */
x_act_lsb:	.byte	XPIX&0xff
/* Horizontal blanking pixels 8 lsbits (0-4095)
   End of active to start of next active. */
x_blk_lsb:	.byte	XBLANK&0xff
/* Bits 7-4 	Horizontal active pixels 4 msbits
   Bits 3-0	Horizontal blanking pixels 4 msbits */
x_msbs:		.byte	msbs2(XPIX,XBLANK)

/* Vertical active lines 8 lsbits (0-4095) */
y_act_lsb:	.byte	YPIX&0xff
/* Vertical blanking lines 8 lsbits (0-4095) */
y_blk_lsb:	.byte	YBLANK&0xff
/* Bits 7-4 	Vertical active lines 4 msbits
   Bits 3-0 	Vertical blanking lines 4 msbits */
y_msbs:		.byte	msbs2(YPIX,YBLANK)

/* Horizontal sync offset pixels 8 lsbits (0-1023) From blanking start */
x_snc_off_lsb:	.byte	XOFFSET&0xff
/* Horizontal sync pulse width pixels 8 lsbits (0-1023) */
x_snc_pls_lsb:	.byte	XPULSE&0xff
/* Bits 7-4 	Vertical sync offset lines 4 lsbits -63)
   Bits 3-0 	Vertical sync pulse width lines 4 lsbits -63) */
y_snc_lsb:	.byte	((YOFFSET-63)<<4)+(YPULSE-63)
/* Bits 7-6 	Horizontal sync offset pixels 2 msbits
   Bits 5-4 	Horizontal sync pulse width pixels 2 msbits
   Bits 3-2 	Vertical sync offset lines 2 msbits
   Bits 1-0 	Vertical sync pulse width lines 2 msbits */
xy_snc_msbs:	.byte	msbs4(XOFFSET,XPULSE,YOFFSET,YPULSE)

/* Horizontal display size, mm, 8 lsbits (0-4095 mm, 161 in) */
x_dsp_size:	.byte	xsize&0xff

/* Vertical display size, mm, 8 lsbits (0-4095 mm, 161 in) */
y_dsp_size:	.byte	ysize&0xff

/* Bits 7-4 	Horizontal display size, mm, 4 msbits
   Bits 3-0 	Vertical display size, mm, 4 msbits */
dsp_size_mbsb:	.byte	msbs2(xsize,ysize)

/* Horizontal border pixels (each side; total is twice this) */
x_border:	.byte	0
/* Vertical border lines (each side; total is twice this) */
y_border:	.byte	0

/* Bit 7 	Interlaced
   Bits 6-5 	Stereo mode: 00=No stereo; other values depend on bit 0:
   Bit 0=0: 01=Field sequential, sync=1 during right; 10=similar,
     sync=1 during left; 11=4-way interleaved stereo
   Bit 0=1 2-way interleaved stereo: 01=Right image on even lines;
     10=Left image on even lines; 11=side-by-side
   Bits 4-3 	Sync type: 00=Analog composite; 01=Bipolar analog composite;
     10=Digital composite (on HSync); 11=Digital separate
   Bit 2 	If digital separate: Vertical sync polarity (1=positive)
   Other types: VSync serrated (HSync during VSync)
   Bit 1 	If analog sync: Sync on all 3 RGB lines (else green only)
   Digital: HSync polarity (1=positive)
   Bit 0 	2-way line-interleaved stereo, if bits 4-3 are not 00. */
features:	.byte	0x18+(VSYNC_POL<<2)+(HSYNC_POL<<1)

descriptor2:	.byte	0,0	/* Not a detailed timing descriptor */
		.byte	0	/* Must be zero */
		.byte	0xff	/* Descriptor is monitor serial number (text) */
		.byte	0	/* Must be zero */
start1:		.ascii	"Linux #0"
end1:		.byte	0x0a	/* End marker */
		.fill	12-(end1-start1), 1, 0x20 /* Padded spaces */
descriptor3:	.byte	0,0	/* Not a detailed timing descriptor */
		.byte	0	/* Must be zero */
		.byte	0xfd	/* Descriptor is monitor range limits */
		.byte	0	/* Must be zero */
start2:		.byte	VFREQ-1	/* Minimum vertical field rate (1-255 Hz) */
		.byte	VFREQ+1	/* Maximum vertical field rate (1-255 Hz) */
		.byte	(CLOCK/(XPIX+XBLANK))-1 /* Minimum horizontal line rate
						    (1-255 kHz) */
		.byte	(CLOCK/(XPIX+XBLANK))+1 /* Maximum horizontal line rate
						    (1-255 kHz) */
		.byte	(CLOCK/10000)+1	/* Maximum pixel clock rate, rounded up
					   to 10 MHz multiple (10-2550 MHz) */
		.byte	0	/* No extended timing information type */
end2:		.byte	0x0a	/* End marker */
		.fill	12-(end2-start2), 1, 0x20 /* Padded spaces */
descriptor4:	.byte	0,0	/* Not a detailed timing descriptor */
		.byte	0	/* Must be zero */
		.byte	0xfc	/* Descriptor is text */
		.byte	0	/* Must be zero */
start3:		.ascii	TIMING_NAME
end3:		.byte	0x0a	/* End marker */
		.fill	12-(end3-start3), 1, 0x20 /* Padded spaces */
extensions:	.byte	0	/* Number of extensions to follow */
checksum:	.byte	CRC	/* Sum of all bytes must be 0 */