988f446fe0
Even though they're defined to zero by the spec, we've seen an EDID block where the (empty) ASCII strings were stuffed in a byte early, leading to the descriptor being considered a detailed timing instead.
469 lines
13 KiB
C
469 lines
13 KiB
C
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/* edid.h: defines to parse an EDID block
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*
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* This file contains all information to interpret a standard EDIC block
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* transmitted by a display device via DDC (Display Data Channel). So far
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* there is no information to deal with optional EDID blocks.
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* DDC is a Trademark of VESA (Video Electronics Standard Association).
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*
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* Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
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*/
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#ifndef _EDID_H_
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#define _EDID_H_
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/* read complete EDID record */
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#define EDID1_LEN 128
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#define BITS_PER_BYTE 9
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#define NUM BITS_PER_BYTE*EDID1_LEN
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#define HEADER 6
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#define STD_TIMINGS 8
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#define DET_TIMINGS 4
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#ifdef _PARSE_EDID_
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/* header: 0x00 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0x00 */
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#define HEADER_SECTION 0
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#define HEADER_LENGTH 8
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/* vendor section */
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#define VENDOR_SECTION (HEADER_SECTION + HEADER_LENGTH)
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#define V_MANUFACTURER 0
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#define V_PROD_ID (V_MANUFACTURER + 2)
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#define V_SERIAL (V_PROD_ID + 2)
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#define V_WEEK (V_SERIAL + 4)
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#define V_YEAR (V_WEEK + 1)
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#define VENDOR_LENGTH (V_YEAR + 1)
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/* EDID version */
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#define VERSION_SECTION (VENDOR_SECTION + VENDOR_LENGTH)
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#define V_VERSION 0
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#define V_REVISION (V_VERSION + 1)
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#define VERSION_LENGTH (V_REVISION + 1)
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/* display information */
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#define DISPLAY_SECTION (VERSION_SECTION + VERSION_LENGTH)
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#define D_INPUT 0
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#define D_HSIZE (D_INPUT + 1)
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#define D_VSIZE (D_HSIZE + 1)
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#define D_GAMMA (D_VSIZE + 1)
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#define FEAT_S (D_GAMMA + 1)
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#define D_RG_LOW (FEAT_S + 1)
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#define D_BW_LOW (D_RG_LOW + 1)
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#define D_REDX (D_BW_LOW + 1)
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#define D_REDY (D_REDX + 1)
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#define D_GREENX (D_REDY + 1)
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#define D_GREENY (D_GREENX + 1)
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#define D_BLUEX (D_GREENY + 1)
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#define D_BLUEY (D_BLUEX + 1)
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#define D_WHITEX (D_BLUEY + 1)
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#define D_WHITEY (D_WHITEX + 1)
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#define DISPLAY_LENGTH (D_WHITEY + 1)
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/* supported VESA and other standard timings */
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#define ESTABLISHED_TIMING_SECTION (DISPLAY_SECTION + DISPLAY_LENGTH)
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#define E_T1 0
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#define E_T2 (E_T1 + 1)
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#define E_TMANU (E_T2 + 1)
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#define E_TIMING_LENGTH (E_TMANU + 1)
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/* non predefined standard timings supported by display */
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#define STD_TIMING_SECTION (ESTABLISHED_TIMING_SECTION + E_TIMING_LENGTH)
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#define STD_TIMING_INFO_LEN 2
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#define STD_TIMING_INFO_NUM STD_TIMINGS
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#define STD_TIMING_LENGTH (STD_TIMING_INFO_LEN * STD_TIMING_INFO_NUM)
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/* detailed timing info of non standard timings */
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#define DET_TIMING_SECTION (STD_TIMING_SECTION + STD_TIMING_LENGTH)
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#define DET_TIMING_INFO_LEN 18
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#define MONITOR_DESC_LEN DET_TIMING_INFO_LEN
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#define DET_TIMING_INFO_NUM DET_TIMINGS
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#define DET_TIMING_LENGTH (DET_TIMING_INFO_LEN * DET_TIMING_INFO_NUM)
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/* number of EDID sections to follow */
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#define NO_EDID (DET_TIMING_SECTION + DET_TIMING_LENGTH)
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/* one byte checksum */
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#define CHECKSUM (NO_EDID + 1)
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#if (CHECKSUM != (EDID1_LEN - 1))
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# error "EDID1 length != 128!"
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#endif
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#define SECTION(x,y) (Uchar *)(x + y)
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#define GET_ARRAY(y) ((Uchar *)(c + y))
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#define GET(y) *(Uchar *)(c + y)
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/* extract information from vendor section */
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#define _PROD_ID(x) x[0] + (x[1] << 8);
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#define PROD_ID _PROD_ID(GET_ARRAY(V_PROD_ID))
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#define _SERIAL_NO(x) x[0] + (x[1] << 8) + (x[2] << 16) + (x[3] << 24)
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#define SERIAL_NO _SERIAL_NO(GET_ARRAY(V_SERIAL))
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#define _YEAR(x) (x & 0xFF) + 1990
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#define YEAR _YEAR(GET(V_YEAR))
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#define WEEK GET(V_WEEK) & 0xFF
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#define _L1(x) ((x[0] & 0x7C) >> 2) + '@'
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#define _L2(x) ((x[0] & 0x03) << 3) + ((x[1] & 0xE0) >> 5) + '@'
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#define _L3(x) (x[1] & 0x1F) + '@';
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#define L1 _L1(GET_ARRAY(V_MANUFACTURER))
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#define L2 _L2(GET_ARRAY(V_MANUFACTURER))
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#define L3 _L3(GET_ARRAY(V_MANUFACTURER))
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/* extract information from version section */
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#define VERSION GET(V_VERSION)
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#define REVISION GET(V_REVISION)
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/* extract information from display section */
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#define _INPUT_TYPE(x) ((x & 0x80) >> 7)
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#define INPUT_TYPE _INPUT_TYPE(GET(D_INPUT))
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#define _INPUT_VOLTAGE(x) ((x & 0x60) >> 5)
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#define INPUT_VOLTAGE _INPUT_VOLTAGE(GET(D_INPUT))
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#define _SETUP(x) ((x & 0x10) >> 4)
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#define SETUP _SETUP(GET(D_INPUT))
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#define _SYNC(x) (x & 0x0F)
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#define SYNC _SYNC(GET(D_INPUT))
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#define _DFP(x) (x & 0x01)
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#define DFP _DFP(GET(D_INPUT))
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#define _GAMMA(x) (x == 0xff ? 1.0 : ((x + 100.0)/100.0))
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#define GAMMA _GAMMA(GET(D_GAMMA))
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#define HSIZE_MAX GET(D_HSIZE)
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#define VSIZE_MAX GET(D_VSIZE)
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#define _DPMS(x) ((x & 0xE0) >> 5)
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#define DPMS _DPMS(GET(FEAT_S))
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#define _DISPLAY_TYPE(x) ((x & 0x18) >> 3)
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#define DISPLAY_TYPE _DISPLAY_TYPE(GET(FEAT_S))
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#define _MSC(x) (x & 0x7)
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#define MSC _MSC(GET(FEAT_S))
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/* color characteristics */
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#define CC_L(x,y) ((x & (0x03 << y)) >> y)
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#define CC_H(x) (x << 2)
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#define I_CC(x,y,z) CC_H(y) | CC_L(x,z)
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#define F_CC(x) ((x)/1024.0)
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#define REDX F_CC(I_CC((GET(D_RG_LOW)),(GET(D_REDX)),6))
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#define REDY F_CC(I_CC((GET(D_RG_LOW)),(GET(D_REDY)),4))
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#define GREENX F_CC(I_CC((GET(D_RG_LOW)),(GET(D_GREENX)),2))
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#define GREENY F_CC(I_CC((GET(D_RG_LOW)),(GET(D_GREENY)),0))
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#define BLUEX F_CC(I_CC((GET(D_BW_LOW)),(GET(D_BLUEX)),6))
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#define BLUEY F_CC(I_CC((GET(D_BW_LOW)),(GET(D_BLUEY)),4))
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#define WHITEX F_CC(I_CC((GET(D_BW_LOW)),(GET(D_WHITEX)),2))
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#define WHITEY F_CC(I_CC((GET(D_BW_LOW)),(GET(D_WHITEY)),0))
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/* extract information from standard timing section */
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#define T1 GET(E_T1)
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#define T2 GET(E_T2)
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#define T_MANU GET(E_TMANU)
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/* extract information from estabished timing section */
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#define _VALID_TIMING(x) !(((x[0] == 0x01) && (x[1] == 0x01)) \
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|| ((x[0] == 0x00) && (x[1] == 0x00)) \
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|| ((x[0] == 0x20) && (x[1] == 0x20)) )
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#define VALID_TIMING _VALID_TIMING(c)
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#define _HSIZE1(x) ((x[0] + 31) * 8)
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#define HSIZE1 _HSIZE1(c)
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#define RATIO(x) ((x[1] & 0xC0) >> 6)
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#define RATIO1_1 0
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/* EDID Ver. 1.3 redefined this */
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#define RATIO16_10 RATIO1_1
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#define RATIO4_3 1
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#define RATIO5_4 2
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#define RATIO16_9 3
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#define _VSIZE1(x,y,r) switch(RATIO(x)){ \
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case RATIO1_1: y = ((v->version > 1 || v->revision > 2) \
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? (_HSIZE1(x) * 10) / 16 : _HSIZE1(x)); break; \
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case RATIO4_3: y = _HSIZE1(x) * 3 / 4; break; \
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case RATIO5_4: y = _HSIZE1(x) * 4 / 5; break; \
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case RATIO16_9: y = _HSIZE1(x) * 9 / 16; break; \
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}
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#define VSIZE1(x) _VSIZE1(c,x,v)
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#define _REFRESH_R(x) (x[1] & 0x3F) + 60
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#define REFRESH_R _REFRESH_R(c)
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#define _ID_LOW(x) x[0]
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#define ID_LOW _ID_LOW(c)
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#define _ID_HIGH(x) (x[1] << 8)
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#define ID_HIGH _ID_HIGH(c)
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#define STD_TIMING_ID (ID_LOW | ID_HIGH)
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#define _NEXT_STD_TIMING(x) (x = (x + STD_TIMING_INFO_LEN))
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#define NEXT_STD_TIMING _NEXT_STD_TIMING(c)
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/* EDID Ver. >= 1.2 */
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/**
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* Returns true if the pointer is the start of a monitor descriptor block
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* instead of a detailed timing descriptor.
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*
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* Checking the reserved pad fields for zeroes fails on some monitors with
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* broken empty ASCII strings. Only the first two bytes are reliable.
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*/
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#define _IS_MONITOR_DESC(x) (x[0] == 0 && x[1] == 0)
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#define IS_MONITOR_DESC _IS_MONITOR_DESC(c)
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#define _PIXEL_CLOCK(x) (x[0] + (x[1] << 8)) * 10000
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#define PIXEL_CLOCK _PIXEL_CLOCK(c)
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#define _H_ACTIVE(x) (x[2] + ((x[4] & 0xF0) << 4))
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#define H_ACTIVE _H_ACTIVE(c)
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#define _H_BLANK(x) (x[3] + ((x[4] & 0x0F) << 8))
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#define H_BLANK _H_BLANK(c)
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#define _V_ACTIVE(x) (x[5] + ((x[7] & 0xF0) << 4))
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#define V_ACTIVE _V_ACTIVE(c)
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#define _V_BLANK(x) (x[6] + ((x[7] & 0x0F) << 8))
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#define V_BLANK _V_BLANK(c)
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#define _H_SYNC_OFF(x) (x[8] + ((x[11] & 0xC0) << 2))
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#define H_SYNC_OFF _H_SYNC_OFF(c)
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#define _H_SYNC_WIDTH(x) (x[9] + ((x[11] & 0x30) << 4))
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#define H_SYNC_WIDTH _H_SYNC_WIDTH(c)
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#define _V_SYNC_OFF(x) ((x[10] >> 4) + ((x[11] & 0x0C) << 2))
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#define V_SYNC_OFF _V_SYNC_OFF(c)
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#define _V_SYNC_WIDTH(x) ((x[10] & 0x0F) + ((x[11] & 0x03) << 4))
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#define V_SYNC_WIDTH _V_SYNC_WIDTH(c)
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#define _H_SIZE(x) (x[12] + ((x[14] & 0xF0) << 4))
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#define H_SIZE _H_SIZE(c)
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#define _V_SIZE(x) (x[13] + ((x[14] & 0x0F) << 8))
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#define V_SIZE _V_SIZE(c)
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#define _H_BORDER(x) (x[15])
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#define H_BORDER _H_BORDER(c)
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#define _V_BORDER(x) (x[16])
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#define V_BORDER _V_BORDER(c)
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#define _INTERLACED(x) ((x[17] & 0x80) >> 7)
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#define INTERLACED _INTERLACED(c)
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#define _STEREO(x) ((x[17] & 0x60) >> 5)
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#define STEREO _STEREO(c)
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#define _STEREO1(x) (x[17] & 0x1)
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#define STEREO1 _STEREO(c)
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#define _SYNC_T(x) ((x[17] & 0x18) >> 3)
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#define SYNC_T _SYNC_T(c)
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#define _MISC(x) ((x[17] & 0x06) >> 1)
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#define MISC _MISC(c)
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#define _MONITOR_DESC_TYPE(x) x[3]
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#define MONITOR_DESC_TYPE _MONITOR_DESC_TYPE(c)
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#define SERIAL_NUMBER 0xFF
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#define ASCII_STR 0xFE
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#define MONITOR_RANGES 0xFD
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#define _MIN_V(x) x[5]
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#define MIN_V _MIN_V(c)
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#define _MAX_V(x) x[6]
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#define MAX_V _MAX_V(c)
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#define _MIN_H(x) x[7]
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#define MIN_H _MIN_H(c)
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#define _MAX_H(x) x[8]
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#define MAX_H _MAX_H(c)
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#define _MAX_CLOCK(x) x[9]
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#define MAX_CLOCK _MAX_CLOCK(c)
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#define _HAVE_2ND_GTF(x) (x[10] == 0x02)
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#define HAVE_2ND_GTF _HAVE_2ND_GTF(c)
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#define _F_2ND_GTF(x) (x[12] * 2)
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#define F_2ND_GTF _F_2ND_GTF(c)
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#define _C_2ND_GTF(x) (x[13] / 2)
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#define C_2ND_GTF _C_2ND_GTF(c)
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#define _M_2ND_GTF(x) (x[14] + (x[15] << 8))
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#define M_2ND_GTF _M_2ND_GTF(c)
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#define _K_2ND_GTF(x) (x[16])
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#define K_2ND_GTF _K_2ND_GTF(c)
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#define _J_2ND_GTF(x) (x[17] / 2)
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#define J_2ND_GTF _J_2ND_GTF(c)
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#define MONITOR_NAME 0xFC
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#define ADD_COLOR_POINT 0xFB
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#define WHITEX F_CC(I_CC((GET(D_BW_LOW)),(GET(D_WHITEX)),2))
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#define WHITEY F_CC(I_CC((GET(D_BW_LOW)),(GET(D_WHITEY)),0))
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#define _WHITEX_ADD(x,y) F_CC(I_CC(((*(x + y))),(*(x + y + 1)),2))
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#define _WHITEY_ADD(x,y) F_CC(I_CC(((*(x + y))),(*(x + y + 2)),0))
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#define _WHITE_INDEX1(x) x[5]
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#define WHITE_INDEX1 _WHITE_INDEX1(c)
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#define _WHITE_INDEX2(x) x[10]
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#define WHITE_INDEX2 _WHITE_INDEX2(c)
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#define WHITEX1 _WHITEX_ADD(c,6)
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#define WHITEY1 _WHITEY_ADD(c,6)
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#define WHITEX2 _WHITEX_ADD(c,12)
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#define WHITEY2 _WHITEY_ADD(c,12)
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#define _WHITE_GAMMA1(x) _GAMMA(x[9])
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#define WHITE_GAMMA1 _WHITE_GAMMA1(c)
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#define _WHITE_GAMMA2(x) _GAMMA(x[14])
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#define WHITE_GAMMA2 _WHITE_GAMMA2(c)
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#define ADD_STD_TIMINGS 0xFA
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#define ADD_DUMMY 0x10
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#define _NEXT_DT_MD_SECTION(x) (x = (x + DET_TIMING_INFO_LEN))
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#define NEXT_DT_MD_SECTION _NEXT_DT_MD_SECTION(c)
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#endif /* _PARSE_EDID_ */
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/* input type */
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#define DIGITAL(x) x
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/* DFP */
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#define DFP1(x) x
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/* input voltage level */
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#define V070 0 /* 0.700V/0.300V */
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#define V071 1 /* 0.714V/0.286V */
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#define V100 2 /* 1.000V/0.400V */
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#define V007 3 /* 0.700V/0.000V */
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/* Signal level setup */
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#define SIG_SETUP(x) (x)
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/* sync characteristics */
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#define SEP_SYNC(x) (x & 0x08)
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#define COMP_SYNC(x) (x & 0x04)
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#define SYNC_O_GREEN(x) (x & 0x02)
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#define SYNC_SERR(x) (x & 0x01)
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/* DPMS features */
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#define DPMS_STANDBY(x) (x & 0x04)
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#define DPMS_SUSPEND(x) (x & 0x02)
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#define DPMS_OFF(x) (x & 0x01)
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/* display type */
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#define DISP_MONO 0
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#define DISP_RGB 1
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#define DISP_MULTCOLOR 2
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/* Msc stuff EDID Ver > 1.1 */
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#define STD_COLOR_SPACE(x) (x & 0x4)
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#define PREFERRED_TIMING_MODE(x) (x & 0x2)
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#define GFT_SUPPORTED(x) (x & 0x1)
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/* detailed timing misc */
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#define IS_INTERLACED(x) (x)
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#define IS_STEREO(x) (x)
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#define IS_RIGHT_STEREO(x) (x & 0x01)
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#define IS_LEFT_STEREO(x) (x & 0x02)
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#define IS_4WAY_STEREO(x) (x & 0x03)
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#define IS_RIGHT_ON_SYNC(x) IS_RIGHT_STEREO(x)
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#define IS_LEFT_ON_SYNC(x) IS_LEFT_STEREO(x)
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typedef unsigned int Uint;
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typedef unsigned char Uchar;
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struct vendor {
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char name[4];
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int prod_id;
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Uint serial;
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int week;
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int year;
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};
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struct edid_version {
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int version;
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int revision;
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};
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struct disp_features {
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unsigned int input_type:1;
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unsigned int input_voltage:2;
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unsigned int input_setup:1;
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unsigned int input_sync:5;
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unsigned int input_dfp:1;
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int hsize;
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int vsize;
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float gamma;
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unsigned int dpms:3;
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unsigned int display_type:2;
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unsigned int msc:3;
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float redx;
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float redy;
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float greenx;
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float greeny;
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float bluex;
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float bluey;
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float whitex;
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float whitey;
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};
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struct established_timings {
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Uchar t1;
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Uchar t2;
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Uchar t_manu;
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};
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struct std_timings {
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int hsize;
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int vsize;
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int refresh;
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CARD16 id;
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};
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|
|
|
struct detailed_timings {
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|
int clock;
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|
int h_active;
|
|
int h_blanking;
|
|
int v_active;
|
|
int v_blanking;
|
|
int h_sync_off;
|
|
int h_sync_width;
|
|
int v_sync_off;
|
|
int v_sync_width;
|
|
int h_size;
|
|
int v_size;
|
|
int h_border;
|
|
int v_border;
|
|
unsigned int interlaced:1;
|
|
unsigned int stereo:2;
|
|
unsigned int sync:2;
|
|
unsigned int misc:2;
|
|
unsigned int stereo_1:1;
|
|
};
|
|
|
|
#define DT 0
|
|
#define DS_SERIAL 0xFF
|
|
#define DS_ASCII_STR 0xFE
|
|
#define DS_NAME 0xFC
|
|
#define DS_RANGES 0xFD
|
|
#define DS_WHITE_P 0xFB
|
|
#define DS_STD_TIMINGS 0xFA
|
|
#define DS_DUMMY 0x10
|
|
#define DS_UNKOWN 0x100 /* type is an int */
|
|
|
|
struct monitor_ranges {
|
|
int min_v;
|
|
int max_v;
|
|
int min_h;
|
|
int max_h;
|
|
int max_clock;
|
|
int gtf_2nd_f;
|
|
int gtf_2nd_c;
|
|
int gtf_2nd_m;
|
|
int gtf_2nd_k;
|
|
int gtf_2nd_j;
|
|
};
|
|
|
|
struct whitePoints{
|
|
int index;
|
|
float white_x;
|
|
float white_y;
|
|
float white_gamma;
|
|
};
|
|
|
|
struct detailed_monitor_section {
|
|
int type;
|
|
union {
|
|
struct detailed_timings d_timings;
|
|
Uchar serial[13];
|
|
Uchar ascii_data[13];
|
|
Uchar name[13];
|
|
struct monitor_ranges ranges;
|
|
struct std_timings std_t[5];
|
|
struct whitePoints wp[2];
|
|
} section;
|
|
};
|
|
|
|
typedef struct {
|
|
int scrnIndex;
|
|
struct vendor vendor;
|
|
struct edid_version ver;
|
|
struct disp_features features;
|
|
struct established_timings timings1;
|
|
struct std_timings timings2[8];
|
|
struct detailed_monitor_section det_mon[4];
|
|
void *vdif; /* unused */
|
|
int no_sections;
|
|
Uchar *rawData;
|
|
} xf86Monitor, *xf86MonPtr;
|
|
|
|
extern xf86MonPtr ConfiguredMonitor;
|
|
|
|
#endif /* _EDID_H_ */
|