xref: /openbmc/linux/tools/edid/edid.S (revision c4f7ac64) 
1/*
2   edid.S: EDID data template
3
4   Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org>
5
6   This program is free software; you can redistribute it and/or
7   modify it under the terms of the GNU General Public License
8   as published by the Free Software Foundation; either version 2
9   of the License, or (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
19*/
20
21
22/* Manufacturer */
23#define MFG_LNX1 'L'
24#define MFG_LNX2 'N'
25#define MFG_LNX3 'X'
26#define SERIAL 0
27#define YEAR 2012
28#define WEEK 5
29
30/* EDID 1.3 standard definitions */
31#define XY_RATIO_16_10	0b00
32#define XY_RATIO_4_3	0b01
33#define XY_RATIO_5_4	0b10
34#define XY_RATIO_16_9	0b11
35
36/* Provide defaults for the timing bits */
37#ifndef ESTABLISHED_TIMING1_BITS
38#define ESTABLISHED_TIMING1_BITS 0x00
39#endif
40#ifndef ESTABLISHED_TIMING2_BITS
41#define ESTABLISHED_TIMING2_BITS 0x00
42#endif
43#ifndef ESTABLISHED_TIMING3_BITS
44#define ESTABLISHED_TIMING3_BITS 0x00
45#endif
46
47#define mfgname2id(v1,v2,v3) \
48	((((v1-'@')&0x1f)<<10)+(((v2-'@')&0x1f)<<5)+((v3-'@')&0x1f))
49#define swap16(v1) ((v1>>8)+((v1&0xff)<<8))
50#define lsbs2(v1,v2) (((v1&0x0f)<<4)+(v2&0x0f))
51#define msbs2(v1,v2) ((((v1>>8)&0x0f)<<4)+((v2>>8)&0x0f))
52#define msbs4(v1,v2,v3,v4) \
53	((((v1>>8)&0x03)<<6)+(((v2>>8)&0x03)<<4)+\
54	(((v3>>4)&0x03)<<2)+((v4>>4)&0x03))
55#define pixdpi2mm(pix,dpi) ((pix*25)/dpi)
56#define xsize pixdpi2mm(XPIX,DPI)
57#define ysize pixdpi2mm(YPIX,DPI)
58
59		.data
60
61/* Fixed header pattern */
62header:		.byte	0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x00
63
64mfg_id:		.hword	swap16(mfgname2id(MFG_LNX1, MFG_LNX2, MFG_LNX3))
65
66prod_code:	.hword	0
67
68/* Serial number. 32 bits, little endian. */
69serial_number:	.long	SERIAL
70
71/* Week of manufacture */
72week:		.byte	WEEK
73
74/* Year of manufacture, less 1990. (1990-2245)
75   If week=255, it is the model year instead */
76year:		.byte	YEAR-1990
77
78version:	.byte	VERSION 	/* EDID version, usually 1 (for 1.3) */
79revision:	.byte	REVISION	/* EDID revision, usually 3 (for 1.3) */
80
81/* If Bit 7=1	Digital input. If set, the following bit definitions apply:
82     Bits 6-1	Reserved, must be 0
83     Bit 0	Signal is compatible with VESA DFP 1.x TMDS CRGB,
84		  1 pixel per clock, up to 8 bits per color, MSB aligned,
85   If Bit 7=0	Analog input. If clear, the following bit definitions apply:
86     Bits 6-5	Video white and sync levels, relative to blank
87		  00=+0.7/-0.3 V; 01=+0.714/-0.286 V;
88		  10=+1.0/-0.4 V; 11=+0.7/0 V
89   Bit 4	Blank-to-black setup (pedestal) expected
90   Bit 3	Separate sync supported
91   Bit 2	Composite sync (on HSync) supported
92   Bit 1	Sync on green supported
93   Bit 0	VSync pulse must be serrated when somposite or
94		  sync-on-green is used. */
95video_parms:	.byte	0x6d
96
97/* Maximum horizontal image size, in centimetres
98   (max 292 cm/115 in at 16:9 aspect ratio) */
99max_hor_size:	.byte	xsize/10
100
101/* Maximum vertical image size, in centimetres.
102   If either byte is 0, undefined (e.g. projector) */
103max_vert_size:	.byte	ysize/10
104
105/* Display gamma, minus 1, times 100 (range 1.00-3.5 */
106gamma:		.byte	120
107
108/* Bit 7	DPMS standby supported
109   Bit 6	DPMS suspend supported
110   Bit 5	DPMS active-off supported
111   Bits 4-3	Display type: 00=monochrome; 01=RGB colour;
112		  10=non-RGB multicolour; 11=undefined
113   Bit 2	Standard sRGB colour space. Bytes 25-34 must contain
114		  sRGB standard values.
115   Bit 1	Preferred timing mode specified in descriptor block 1.
116   Bit 0	GTF supported with default parameter values. */
117dsp_features:	.byte	0xea
118
119/* Chromaticity coordinates. */
120/* Red and green least-significant bits
121   Bits 7-6	Red x value least-significant 2 bits
122   Bits 5-4	Red y value least-significant 2 bits
123   Bits 3-2	Green x value lst-significant 2 bits
124   Bits 1-0	Green y value least-significant 2 bits */
125red_green_lsb:	.byte	0x5e
126
127/* Blue and white least-significant 2 bits */
128blue_white_lsb:	.byte	0xc0
129
130/* Red x value most significant 8 bits.
131   0-255 encodes 0-0.996 (255/256); 0-0.999 (1023/1024) with lsbits */
132red_x_msb:	.byte	0xa4
133
134/* Red y value most significant 8 bits */
135red_y_msb:	.byte	0x59
136
137/* Green x and y value most significant 8 bits */
138green_x_y_msb:	.byte	0x4a,0x98
139
140/* Blue x and y value most significant 8 bits */
141blue_x_y_msb:	.byte	0x25,0x20
142
143/* Default white point x and y value most significant 8 bits */
144white_x_y_msb:	.byte	0x50,0x54
145
146/* Established timings */
147/* Bit 7	720x400 @ 70 Hz
148   Bit 6	720x400 @ 88 Hz
149   Bit 5	640x480 @ 60 Hz
150   Bit 4	640x480 @ 67 Hz
151   Bit 3	640x480 @ 72 Hz
152   Bit 2	640x480 @ 75 Hz
153   Bit 1	800x600 @ 56 Hz
154   Bit 0	800x600 @ 60 Hz */
155estbl_timing1:	.byte	ESTABLISHED_TIMING1_BITS
156
157/* Bit 7	800x600 @ 72 Hz
158   Bit 6	800x600 @ 75 Hz
159   Bit 5	832x624 @ 75 Hz
160   Bit 4	1024x768 @ 87 Hz, interlaced (1024x768)
161   Bit 3	1024x768 @ 60 Hz
162   Bit 2	1024x768 @ 72 Hz
163   Bit 1	1024x768 @ 75 Hz
164   Bit 0	1280x1024 @ 75 Hz */
165estbl_timing2:	.byte	ESTABLISHED_TIMING2_BITS
166
167/* Bit 7	1152x870 @ 75 Hz (Apple Macintosh II)
168   Bits 6-0 	Other manufacturer-specific display mod */
169estbl_timing3:	.byte	ESTABLISHED_TIMING3_BITS
170
171/* Standard timing */
172/* X resolution, less 31, divided by 8 (256-2288 pixels) */
173std_xres:	.byte	(XPIX/8)-31
174/* Y resolution, X:Y pixel ratio
175   Bits 7-6	X:Y pixel ratio: 00=16:10; 01=4:3; 10=5:4; 11=16:9.
176   Bits 5-0	Vertical frequency, less 60 (60-123 Hz) */
177std_vres:	.byte	(XY_RATIO<<6)+VFREQ-60
178		.fill	7,2,0x0101	/* Unused */
179
180descriptor1:
181/* Pixel clock in 10 kHz units. (0.-655.35 MHz, little-endian) */
182clock:		.hword	CLOCK/10
183
184/* Horizontal active pixels 8 lsbits (0-4095) */
185x_act_lsb:	.byte	XPIX&0xff
186/* Horizontal blanking pixels 8 lsbits (0-4095)
187   End of active to start of next active. */
188x_blk_lsb:	.byte	XBLANK&0xff
189/* Bits 7-4 	Horizontal active pixels 4 msbits
190   Bits 3-0	Horizontal blanking pixels 4 msbits */
191x_msbs:		.byte	msbs2(XPIX,XBLANK)
192
193/* Vertical active lines 8 lsbits (0-4095) */
194y_act_lsb:	.byte	YPIX&0xff
195/* Vertical blanking lines 8 lsbits (0-4095) */
196y_blk_lsb:	.byte	YBLANK&0xff
197/* Bits 7-4 	Vertical active lines 4 msbits
198   Bits 3-0 	Vertical blanking lines 4 msbits */
199y_msbs:		.byte	msbs2(YPIX,YBLANK)
200
201/* Horizontal sync offset pixels 8 lsbits (0-1023) From blanking start */
202x_snc_off_lsb:	.byte	XOFFSET&0xff
203/* Horizontal sync pulse width pixels 8 lsbits (0-1023) */
204x_snc_pls_lsb:	.byte	XPULSE&0xff
205/* Bits 7-4 	Vertical sync offset lines 4 lsbits (0-63)
206   Bits 3-0 	Vertical sync pulse width lines 4 lsbits (0-63) */
207y_snc_lsb:	.byte	lsbs2(YOFFSET, YPULSE)
208/* Bits 7-6 	Horizontal sync offset pixels 2 msbits
209   Bits 5-4 	Horizontal sync pulse width pixels 2 msbits
210   Bits 3-2 	Vertical sync offset lines 2 msbits
211   Bits 1-0 	Vertical sync pulse width lines 2 msbits */
212xy_snc_msbs:	.byte	msbs4(XOFFSET,XPULSE,YOFFSET,YPULSE)
213
214/* Horizontal display size, mm, 8 lsbits (0-4095 mm, 161 in) */
215x_dsp_size:	.byte	xsize&0xff
216
217/* Vertical display size, mm, 8 lsbits (0-4095 mm, 161 in) */
218y_dsp_size:	.byte	ysize&0xff
219
220/* Bits 7-4 	Horizontal display size, mm, 4 msbits
221   Bits 3-0 	Vertical display size, mm, 4 msbits */
222dsp_size_mbsb:	.byte	msbs2(xsize,ysize)
223
224/* Horizontal border pixels (each side; total is twice this) */
225x_border:	.byte	0
226/* Vertical border lines (each side; total is twice this) */
227y_border:	.byte	0
228
229/* Bit 7 	Interlaced
230   Bits 6-5 	Stereo mode: 00=No stereo; other values depend on bit 0:
231   Bit 0=0: 01=Field sequential, sync=1 during right; 10=similar,
232     sync=1 during left; 11=4-way interleaved stereo
233   Bit 0=1 2-way interleaved stereo: 01=Right image on even lines;
234     10=Left image on even lines; 11=side-by-side
235   Bits 4-3 	Sync type: 00=Analog composite; 01=Bipolar analog composite;
236     10=Digital composite (on HSync); 11=Digital separate
237   Bit 2 	If digital separate: Vertical sync polarity (1=positive)
238   Other types: VSync serrated (HSync during VSync)
239   Bit 1 	If analog sync: Sync on all 3 RGB lines (else green only)
240   Digital: HSync polarity (1=positive)
241   Bit 0 	2-way line-interleaved stereo, if bits 4-3 are not 00. */
242features:	.byte	0x18+(VSYNC_POL<<2)+(HSYNC_POL<<1)
243
244descriptor2:	.byte	0,0	/* Not a detailed timing descriptor */
245		.byte	0	/* Must be zero */
246		.byte	0xff	/* Descriptor is monitor serial number (text) */
247		.byte	0	/* Must be zero */
248start1:		.ascii	"Linux #0"
249end1:		.byte	0x0a	/* End marker */
250		.fill	12-(end1-start1), 1, 0x20 /* Padded spaces */
251descriptor3:	.byte	0,0	/* Not a detailed timing descriptor */
252		.byte	0	/* Must be zero */
253		.byte	0xfd	/* Descriptor is monitor range limits */
254		.byte	0	/* Must be zero */
255start2:		.byte	VFREQ-1	/* Minimum vertical field rate (1-255 Hz) */
256		.byte	VFREQ+1	/* Maximum vertical field rate (1-255 Hz) */
257		.byte	(CLOCK/(XPIX+XBLANK))-1 /* Minimum horizontal line rate
258						    (1-255 kHz) */
259		.byte	(CLOCK/(XPIX+XBLANK))+1 /* Maximum horizontal line rate
260						    (1-255 kHz) */
261		.byte	(CLOCK/10000)+1	/* Maximum pixel clock rate, rounded up
262					   to 10 MHz multiple (10-2550 MHz) */
263		.byte	0	/* No extended timing information type */
264end2:		.byte	0x0a	/* End marker */
265		.fill	12-(end2-start2), 1, 0x20 /* Padded spaces */
266descriptor4:	.byte	0,0	/* Not a detailed timing descriptor */
267		.byte	0	/* Must be zero */
268		.byte	0xfc	/* Descriptor is text */
269		.byte	0	/* Must be zero */
270start3:		.ascii	TIMING_NAME
271end3:		.byte	0x0a	/* End marker */
272		.fill	12-(end3-start3), 1, 0x20 /* Padded spaces */
273extensions:	.byte	0	/* Number of extensions to follow */
274checksum:	.byte	CRC	/* Sum of all bytes must be 0 */
275