/*      $NetBSD: edidreg.h,v 1.4 2014/11/17 00:46:04 jmcneill Exp $     */

/*-
* Copyright (c) 2006 Itronix Inc.
* All rights reserved.
*
* Written by Garrett D'Amore for Itronix Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of Itronix Inc. may not be used to endorse
*    or promote products derived from this software without specific
*    prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _DEV_VIDEOMODE_EDIDREG_H
#define _DEV_VIDEOMODE_EDIDREG_H

#define EDID_OFFSET_SIGNATURE           0x00
#define EDID_OFFSET_MANUFACTURER_ID     0x08
#define EDID_OFFSET_PRODUCT_ID          0x0a
#define EDID_OFFSET_SERIAL_NUMBER       0x0c
#define EDID_OFFSET_MANUFACTURE_WEEK    0x10
#define EDID_OFFSET_MANUFACTURE_YEAR    0x11
#define EDID_OFFSET_VERSION             0x12
#define EDID_OFFSET_REVISION            0x13
#define EDID_OFFSET_VIDEO_INPUT         0x14
#define EDID_OFFSET_MAX_HSIZE           0x15    /* in cm */
#define EDID_OFFSET_MAX_VSIZE           0x16
#define EDID_OFFSET_GAMMA               0x17
#define EDID_OFFSET_FEATURE             0x18
#define EDID_OFFSET_CHROMA              0x19
#define EDID_OFFSET_EST_TIMING_1        0x23
#define EDID_OFFSET_EST_TIMING_2        0x24
#define EDID_OFFSET_MFG_TIMING          0x25
#define EDID_OFFSET_STD_TIMING          0x26
#define EDID_OFFSET_DESC_BLOCK          0x36

#define EDID_SIGNATURE          { 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0 }

/* assume x is 16-bit value */
#define EDID_VENDOR_ID(ptr)             ((((ptr)[8]) << 8) + ptr[9])
#define EDID_MANFID_0(x)                ((((x) >> 10) & 0x1f) + '@')
#define EDID_MANFID_1(x)                ((((x) >> 5) & 0x1f) + '@')
#define EDID_MANFID_2(x)                ((((x) >> 0) & 0x1f) + '@')

/* relative to edid block */
#define EDID_PRODUCT_ID(ptr)            (((ptr)[10]) | (((ptr)[11]) << 8))
#define EDID_SERIAL_NUMBER(ptr)         (((ptr)[12] << 24) + \
                                       ((ptr)[13] << 16) + \
                                       ((ptr)[14] << 8) + \
                                       (ptr)[15])

/* relative to edid block */
#define EDID_WEEK(ptr)                  ((ptr)[16])
#define EDID_YEAR(ptr)                  (((ptr)[17]) + 1990)

#define EDID_VERSION(ptr)               ((ptr)[18])
#define EDID_REVISION(ptr)              ((ptr)[19])

#define EDID_VIDEO_INPUT(ptr)           ((ptr)[20])
#define EDID_VIDEO_INPUT_DIGITAL        0x80
/* if INPUT_BIT_DIGITAL set */
#define EDID_VIDEO_INPUT_DFP1_COMPAT    0x01
/* if INPUT_BIT_DIGITAL not set */
#define EDID_VIDEO_INPUT_BLANK_TO_BLACK 0x10
#define EDID_VIDEO_INPUT_SEPARATE_SYNCS 0x08
#define EDID_VIDEO_INPUT_COMPOSITE_SYNC 0x04
#define EDID_VIDEO_INPUT_SYNC_ON_GRN    0x02
#define EDID_VIDEO_INPUT_SERRATION      0x01
#define EDID_VIDEO_INPUT_LEVEL(x)       (((x) & 0x60) >> 5)
/* meanings of level bits are as follows, I don't know names */
/* 0 = 0.7,0.3,  1 = 0.714,0.286, 2 = 1.0,0.4, 3 = 0.7,0.0 */

/* relative to edid block */
#define EDID_MAX_HSIZE(ptr)             ((ptr)[21])     /* cm */
#define EDID_MAX_VSIZE(ptr)             ((ptr)[22])     /* cm */
/* gamma is scaled by 100 (avoid fp), e.g. 213 == 2.13 */
#define _GAMMA(x)                       ((x) == 0xff ? 100 : ((x) + 100))
#define EDID_GAMMA(ptr)                 _GAMMA(ptr[23])

#define EDID_FEATURES(ptr)              ((ptr)[24])
#define EDID_FEATURES_STANDBY                   0x80
#define EDID_FEATURES_SUSPEND                   0x40
#define EDID_FEATURES_ACTIVE_OFF                0x20
#define EDID_FEATURES_DISP_TYPE(x)              (((x) & 0x18) >> 3)
#define EDID_FEATURES_DISP_TYPE_MONO            0
#define EDID_FEATURES_DISP_TYPE_RGB             1
#define EDID_FEATURES_DISP_TYPE_NON_RGB         2
#define EDID_FEATURES_DISP_TYPE_UNDEFINED       3
#define EDID_FEATURES_STD_COLOR                 0x04
#define EDID_FEATURES_PREFERRED_TIMING          0x02
#define EDID_FEATURES_DEFAULT_GTF               0x01

/* chroma values 0.0 - 0.999 scaled as 0-999 */
#define _CHLO(byt, shft)        (((byt) >> (shft)) & 0x3)
#define _CHHI(byt)              ((byt) << 2)
#define _CHHILO(ptr, l, s, h)   (_CHLO((ptr)[l], s) | _CHHI((ptr)[h]))
#define _CHROMA(ptr, l, s, h)   ((_CHHILO(ptr, l, s, h) * 1000) / 1024)

#define EDID_CHROMA_REDX(ptr)   (_CHROMA(ptr, 25, 6, 27))
#define EDID_CHROMA_REDY(ptr)   (_CHROMA(ptr, 25, 4, 28))
#define EDID_CHROMA_GREENX(ptr) (_CHROMA(ptr, 25, 2, 29))
#define EDID_CHROMA_GREENY(ptr) (_CHROMA(ptr, 25, 0, 30))
#define EDID_CHROMA_BLUEX(ptr)  (_CHROMA(ptr, 26, 6, 31))
#define EDID_CHROMA_BLUEY(ptr)  (_CHROMA(ptr, 26, 4, 32))
#define EDID_CHROMA_WHITEX(ptr) (_CHROMA(ptr, 26, 2, 33))
#define EDID_CHROMA_WHITEY(ptr) (_CHROMA(ptr, 26, 0, 34))

/* relative to edid block */
#define EDID_EST_TIMING(ptr)            (((ptr)[35] << 8) | (ptr)[36])
#define EDID_EST_TIMING_720_400_70      0x8000  /* 720x400 @ 70Hz */
#define EDID_EST_TIMING_720_400_88      0x4000  /* 720x400 @ 88Hz */
#define EDID_EST_TIMING_640_480_60      0x2000  /* 640x480 @ 60Hz */
#define EDID_EST_TIMING_640_480_67      0x1000  /* 640x480 @ 67Hz */
#define EDID_EST_TIMING_640_480_72      0x0800  /* 640x480 @ 72Hz */
#define EDID_EST_TIMING_640_480_75      0x0400  /* 640x480 @ 75Hz */
#define EDID_EST_TIMING_800_600_56      0x0200  /* 800x600 @ 56Hz */
#define EDID_EST_TIMING_800_600_60      0x0100  /* 800x600 @ 60Hz */
#define EDID_EST_TIMING_800_600_72      0x0080  /* 800x600 @ 72Hz */
#define EDID_EST_TIMING_800_600_75      0x0040  /* 800x600 @ 75Hz */
#define EDID_EST_TIMING_832_624_75      0x0020  /* 832x624 @ 75Hz */
#define EDID_EST_TIMING_1024_768_87I    0x0010  /* 1024x768i @ 87Hz */
#define EDID_EST_TIMING_1024_768_60     0x0008  /* 1024x768 @ 60Hz */
#define EDID_EST_TIMING_1024_768_70     0x0004  /* 1024x768 @ 70Hz */
#define EDID_EST_TIMING_1024_768_75     0x0002  /* 1024x768 @ 75Hz */
#define EDID_EST_TIMING_1280_1024_75    0x0001  /* 1280x1024 @ 75Hz */

/*
* N.B.: ptr is relative to standard timing block - used for standard timing
* descriptors as well as standard timings section of edid!
*/
#define EDID_STD_TIMING_HRES(ptr)       ((((ptr)[0]) * 8) + 248)
#define EDID_STD_TIMING_VFREQ(ptr)      ((((ptr)[1]) & 0x3f) + 60)
#define EDID_STD_TIMING_RATIO(ptr)      ((ptr)[1] & 0xc0)
#define EDID_STD_TIMING_RATIO_16_10     0x00
#define EDID_STD_TIMING_RATIO_4_3       0x40
#define EDID_STD_TIMING_RATIO_5_4       0x80
#define EDID_STD_TIMING_RATIO_16_9      0xc0

#define EDID_STD_TIMING_SIZE            16
#define EDID_STD_TIMING_COUNT           8

/*
* N.B.: ptr is relative to descriptor block start
*/
#define EDID_BLOCK_SIZE                 18
#define EDID_BLOCK_COUNT                4

/* detailed timing block.... what a mess */
#define EDID_BLOCK_IS_DET_TIMING(ptr)           ((ptr)[0] | (ptr)[1])

#define EDID_DET_TIMING_DOT_CLOCK(ptr)  (((ptr)[0] | ((ptr)[1] << 8)) * 10000)
#define _HACT_LO(ptr)                   ((ptr)[2])
#define _HBLK_LO(ptr)                   ((ptr)[3])
#define _HACT_HI(ptr)                   (((ptr)[4] & 0xf0) << 4)
#define _HBLK_HI(ptr)                   (((ptr)[4] & 0x0f) << 8)
#define EDID_DET_TIMING_HACTIVE(ptr)            (_HACT_LO(ptr) | _HACT_HI(ptr))
#define EDID_DET_TIMING_HBLANK(ptr)             (_HBLK_LO(ptr) | _HBLK_HI(ptr))
#define _VACT_LO(ptr)                   ((ptr)[5])
#define _VBLK_LO(ptr)                   ((ptr)[6])
#define _VACT_HI(ptr)                   (((ptr)[7] & 0xf0) << 4)
#define _VBLK_HI(ptr)                   (((ptr)[7] & 0x0f) << 8)
#define EDID_DET_TIMING_VACTIVE(ptr)            (_VACT_LO(ptr) | _VACT_HI(ptr))
#define EDID_DET_TIMING_VBLANK(ptr)             (_VBLK_LO(ptr) | _VBLK_HI(ptr))
#define _HOFF_LO(ptr)                   ((ptr)[8])
#define _HWID_LO(ptr)                   ((ptr)[9])
#define _VOFF_LO(ptr)                   ((ptr)[10] >> 4)
#define _VWID_LO(ptr)                   ((ptr)[10] & 0xf)
#define _HOFF_HI(ptr)                   (((ptr)[11] & 0xc0) << 2)
#define _HWID_HI(ptr)                   (((ptr)[11] & 0x30) << 4)
#define _VOFF_HI(ptr)                   (((ptr)[11] & 0x0c) << 2)
#define _VWID_HI(ptr)                   (((ptr)[11] & 0x03) << 4)
#define EDID_DET_TIMING_HSYNC_OFFSET(ptr)       (_HOFF_LO(ptr) | _HOFF_HI(ptr))
#define EDID_DET_TIMING_HSYNC_WIDTH(ptr)        (_HWID_LO(ptr) | _HWID_HI(ptr))
#define EDID_DET_TIMING_VSYNC_OFFSET(ptr)       (_VOFF_LO(ptr) | _VOFF_HI(ptr))
#define EDID_DET_TIMING_VSYNC_WIDTH(ptr)        (_VWID_LO(ptr) | _VWID_HI(ptr))
#define _HSZ_LO(ptr)                    ((ptr)[12])
#define _VSZ_LO(ptr)                    ((ptr)[13])
#define _HSZ_HI(ptr)                    (((ptr)[14] & 0xf0) << 4)
#define _VSZ_HI(ptr)                    (((ptr)[14] & 0x0f) << 8)
#define EDID_DET_TIMING_HSIZE(ptr)              (_HSZ_LO(ptr) | _HSZ_HI(ptr))
#define EDID_DET_TIMING_VSIZE(ptr)              (_VSZ_LO(ptr) | _VSZ_HI(ptr))
#define EDID_DET_TIMING_HBORDER(ptr)    ((ptr)[15])
#define EDID_DET_TIMING_VBORDER(ptr)    ((ptr)[16])
#define EDID_DET_TIMING_FLAGS(ptr)      ((ptr)[17])
#define EDID_DET_TIMING_FLAG_INTERLACE          0x80
#define EDID_DET_TIMING_FLAG_STEREO             0x60    /* stereo or not */
#define EDID_DET_TIMING_FLAG_SYNC_SEPARATE      0x18
#define EDID_DET_TIMING_FLAG_VSYNC_POSITIVE     0x04
#define EDID_DET_TIMING_FLAG_HSYNC_POSITIVE     0x02
#define EDID_DET_TIMING_FLAG_STEREO_MODE        0x01    /* stereo mode */


/* N.B.: these tests assume that we already checked for detailed timing! */
#define EDID_BLOCK_TYPE(ptr)                    ((ptr)[3])

#define EDID_DESC_BLOCK_SIZE                    18
#define EDID_DESC_BLOCK_TYPE_SERIAL             0xFF
#define EDID_DESC_BLOCK_TYPE_ASCII              0xFE
#define EDID_DESC_BLOCK_TYPE_RANGE              0xFD
#define EDID_DESC_BLOCK_TYPE_NAME               0xFC
#define EDID_DESC_BLOCK_TYPE_COLOR_POINT        0xFB
#define EDID_DESC_BLOCK_TYPE_STD_TIMING         0xFA

/* used for descriptors 0xFF, 0xFE, and 0xFC */
#define EDID_DESC_ASCII_DATA_OFFSET             5
#define EDID_DESC_ASCII_DATA_LEN                13

#define EDID_DESC_RANGE_MIN_VFREQ(ptr)          ((ptr)[5])      /* Hz */
#define EDID_DESC_RANGE_MAX_VFREQ(ptr)          ((ptr)[6])      /* Hz */
#define EDID_DESC_RANGE_MIN_HFREQ(ptr)          ((ptr)[7])      /* kHz */
#define EDID_DESC_RANGE_MAX_HFREQ(ptr)          ((ptr)[8])      /* kHz */
#define EDID_DESC_RANGE_MAX_CLOCK(ptr)          (((ptr)[9]) * 10) /* MHz */
#define EDID_DESC_RANGE_HAVE_GTF2(ptr)          (((ptr)[10]) == 0x02)
#define EDID_DESC_RANGE_GTF2_HFREQ(ptr)         (((ptr)[12]) * 2)
#define EDID_DESC_RANGE_GTF2_C(ptr)             (((ptr)[13]) / 2)
#define EDID_DESC_RANGE_GTF2_M(ptr)             ((ptr)[14] + ((ptr)[15] << 8))
#define EDID_DESC_RANGE_GTF2_K(ptr)             ((ptr)[16])
#define EDID_DESC_RANGE_GTF2_J(ptr)             ((ptr)[17] / 2)

#define EDID_DESC_COLOR_WHITEX(ptr)
#define EDID_DESC_COLOR_WHITE_INDEX_1(ptr)      ((ptr)[5])
#define EDID_DESC_COLOR_WHITEX_1(ptr)           _CHROMA(ptr, 6, 2, 7)
#define EDID_DESC_COLOR_WHITEY_1(ptr)           _CHROMA(ptr, 6, 0, 8)
#define EDID_DESC_COLOR_GAMMA_1(ptr)            _GAMMA(ptr[9])
#define EDID_DESC_COLOR_WHITE_INDEX_2(ptr)      ((ptr)[10])
#define EDID_DESC_COLOR_WHITEX_2(ptr)           _CHROMA(ptr, 11, 2, 12)
#define EDID_DESC_COLOR_WHITEY_2(ptr)           _CHROMA(ptr, 11, 0, 13)
#define EDID_DESC_COLOR_GAMMA_2(ptr)            _GAMMA(ptr[14])

#define EDID_DESC_STD_TIMING_START              5
#define EDID_DESC_STD_TIMING_COUNT              6

#define EDID_EXT_BLOCK_COUNT(ptr)               ((ptr)[126])

#endif /* _DEV_VIDEOMODE_EDIDREG_H */

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