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