xf86EdidModes.c   [plain text]

/*
 * Copyright 2006 Luc Verhaegen.
 * Copyright 2008 Red Hat, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * @file This file covers code to convert a xf86MonPtr containing EDID-probed
 * information into a list of modes, including applying monitor-specific
 * quirks to fix broken EDID data.
 */
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#else
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#endif

#define _PARSE_EDID_
#include "xf86.h"
#include "xf86DDC.h"
#include <X11/Xatom.h>
#include "property.h"
#include "propertyst.h"
#include "xf86Crtc.h"
#include <string.h>
#include <math.h>

static void handle_detailed_rblank(struct detailed_monitor_section *det_mon,
                                   void *data)
{
    if (det_mon->type == DS_RANGES)
        if (det_mon->section.ranges.supported_blanking & CVT_REDUCED)
            *(Bool*)data = TRUE;
}

static Bool
xf86MonitorSupportsReducedBlanking(xf86MonPtr DDC)
{
    /* EDID 1.4 explicitly defines RB support */
    if (DDC->ver.revision >= 4) {
        Bool ret = FALSE;

        xf86ForEachDetailedBlock(DDC, handle_detailed_rblank, &ret);
        return ret;
    }

    /* For anything older, assume digital means RB support. Boo. */
    if (DDC->features.input_type)
        return TRUE;

    return FALSE;
}

static Bool quirk_prefer_large_60 (int scrnIndex, xf86MonPtr DDC)
{
    /* Belinea 10 15 55 */
    if (memcmp (DDC->vendor.name, "MAX", 4) == 0 &&
	((DDC->vendor.prod_id == 1516) ||
	(DDC->vendor.prod_id == 0x77e)))
	return TRUE;
    
    /* Acer AL1706 */
    if (memcmp (DDC->vendor.name, "ACR", 4) == 0 &&
	DDC->vendor.prod_id == 44358)
	return TRUE;

    /* Bug #10814: Samsung SyncMaster 225BW */
    if (memcmp (DDC->vendor.name, "SAM", 4) == 0 &&
	DDC->vendor.prod_id == 596)
	return TRUE;

    /* Bug #10545: Samsung SyncMaster 226BW */
    if (memcmp (DDC->vendor.name, "SAM", 4) == 0 &&
	DDC->vendor.prod_id == 638)
	return TRUE;

    /* Acer F51 */
    if (memcmp (DDC->vendor.name, "API", 4) == 0 &&
	DDC->vendor.prod_id == 0x7602)
	return TRUE;


    return FALSE;
}

static Bool quirk_prefer_large_75 (int scrnIndex, xf86MonPtr DDC)
{
    /* Bug #11603: Funai Electronics PM36B */
    if (memcmp (DDC->vendor.name, "FCM", 4) == 0 &&
	DDC->vendor.prod_id == 13600)
	return TRUE;

    return FALSE;
}

static Bool quirk_detailed_h_in_cm (int scrnIndex, xf86MonPtr DDC)
{
    /* Bug #11603: Funai Electronics PM36B */
    if (memcmp (DDC->vendor.name, "FCM", 4) == 0 &&
	DDC->vendor.prod_id == 13600)
	return TRUE;

    return FALSE;
}

static Bool quirk_detailed_v_in_cm (int scrnIndex, xf86MonPtr DDC)
{
    /* Bug #11603: Funai Electronics PM36B */
    if (memcmp (DDC->vendor.name, "FCM", 4) == 0 &&
	DDC->vendor.prod_id == 13600)
	return TRUE;

    /* Bug #21000: LGPhilipsLCD LP154W01-TLAJ */
    if (memcmp (DDC->vendor.name, "LPL", 4) == 0 &&
	DDC->vendor.prod_id == 47360)
	return TRUE;

    /* Bug #10304: LGPhilipsLCD LP154W01-A5 */
    if (memcmp(DDC->vendor.name, "LPL", 4) == 0 &&
	DDC->vendor.prod_id == 0)
	return TRUE;

    /* Bug #24482: LGPhilipsLCD LP154W01-TLA1 */
    if (memcmp(DDC->vendor.name, "LPL", 4) == 0 &&
	DDC->vendor.prod_id == 0x2a00)
	return TRUE;

    /* Bug #28414: HP Compaq NC8430 LP154W01-TLA8 */
    if (memcmp (DDC->vendor.name, "LPL", 4) == 0 &&
	DDC->vendor.prod_id == 5750)
	return TRUE;

    /* Bug #21750: Samsung Syncmaster 2333HD */
    if (memcmp (DDC->vendor.name, "SAM", 4) == 0 &&
	DDC->vendor.prod_id == 1157)
	return TRUE;

    return FALSE;
}

static Bool quirk_detailed_use_maximum_size (int scrnIndex, xf86MonPtr DDC)
{
    /* Bug #21324: Iiyama Vision Master 450 */
    if (memcmp (DDC->vendor.name, "IVM", 4) == 0 &&
	DDC->vendor.prod_id == 6400)
	return TRUE;

    /* Bug #41141: Acer Aspire One */
    if (memcmp (DDC->vendor.name, "LGD", 4) == 0 &&
	DDC->vendor.prod_id == 0x7f01)
	return TRUE;

    return FALSE;
}

static Bool quirk_135_clock_too_high (int scrnIndex, xf86MonPtr DDC)
{
    /* Envision Peripherals, Inc. EN-7100e.  See bug #9550. */
    if (memcmp (DDC->vendor.name, "EPI", 4) == 0 &&
	DDC->vendor.prod_id == 59264)
	return TRUE;
    
    return FALSE;
}

static Bool quirk_first_detailed_preferred (int scrnIndex, xf86MonPtr DDC)
{
    /* Philips 107p5 CRT. Reported on xorg@ with pastebin. */
    if (memcmp (DDC->vendor.name, "PHL", 4) == 0 &&
	DDC->vendor.prod_id == 57364)
	return TRUE;

    /* Proview AY765C 17" LCD. See bug #15160*/
    if (memcmp (DDC->vendor.name, "PTS", 4) == 0 &&
	DDC->vendor.prod_id == 765)
	return TRUE;

    /* ACR of some sort RH #284231 */
    if (memcmp (DDC->vendor.name, "ACR", 4) == 0 &&
	DDC->vendor.prod_id == 2423)
	return TRUE;

    /* Peacock Ergovision 19.  See rh#492359 */
    if (memcmp (DDC->vendor.name, "PEA", 4) == 0 &&
	DDC->vendor.prod_id == 9003)
	return TRUE;

    return FALSE;
}

static Bool quirk_detailed_sync_pp(int scrnIndex, xf86MonPtr DDC)
{
    /* Bug #12439: Samsung SyncMaster 205BW */
    if (memcmp (DDC->vendor.name, "SAM", 4) == 0 &&
	DDC->vendor.prod_id == 541)
	return TRUE;
    return FALSE;
}

/* This should probably be made more generic */
static Bool quirk_dvi_single_link(int scrnIndex, xf86MonPtr DDC)
{
    /* Red Hat bug #453106: Apple 23" Cinema Display */
    if (memcmp (DDC->vendor.name, "APL", 4) == 0 &&
	DDC->vendor.prod_id == 0x921c)
	return TRUE;
    return FALSE;
}

typedef struct {
    Bool	(*detect) (int scrnIndex, xf86MonPtr DDC);
    ddc_quirk_t	quirk;
    char	*description;
} ddc_quirk_map_t;

static const ddc_quirk_map_t ddc_quirks[] = {
    {
	quirk_prefer_large_60,   DDC_QUIRK_PREFER_LARGE_60,
	"Detailed timing is not preferred, use largest mode at 60Hz"
    },
    {
	quirk_135_clock_too_high,   DDC_QUIRK_135_CLOCK_TOO_HIGH,
	"Recommended 135MHz pixel clock is too high"
    },
    {
	quirk_prefer_large_75,   DDC_QUIRK_PREFER_LARGE_75,
	"Detailed timing is not preferred, use largest mode at 75Hz"
    },
    {
	quirk_detailed_h_in_cm,   DDC_QUIRK_DETAILED_H_IN_CM,
	"Detailed timings give horizontal size in cm."
    },
    {
	quirk_detailed_v_in_cm,   DDC_QUIRK_DETAILED_V_IN_CM,
	"Detailed timings give vertical size in cm."
    },
    {
	quirk_detailed_use_maximum_size,   DDC_QUIRK_DETAILED_USE_MAXIMUM_SIZE,
	"Use maximum size instead of detailed timing sizes."
    },
    {
	quirk_first_detailed_preferred, DDC_QUIRK_FIRST_DETAILED_PREFERRED,
	"First detailed timing was not marked as preferred."
    },
    {
	quirk_detailed_sync_pp, DDC_QUIRK_DETAILED_SYNC_PP,
	"Use +hsync +vsync for detailed timing."
    },
    {
	quirk_dvi_single_link, DDC_QUIRK_DVI_SINGLE_LINK,
	"Forcing maximum pixel clock to single DVI link."
    },
    { 
	NULL,		DDC_QUIRK_NONE,
	"No known quirks"
    },
};

/*
 * These more or less come from the DMT spec.  The 720x400 modes are
 * inferred from historical 80x25 practice.  The 640x480@67 and 832x624@75
 * modes are old-school Mac modes.  The EDID spec says the 1152x864@75 mode
 * should be 1152x870, again for the Mac, but instead we use the x864 DMT
 * mode.
 *
 * The DMT modes have been fact-checked; the rest are mild guesses.
 */
#define MODEPREFIX NULL, NULL, NULL, 0, M_T_DRIVER
#define MODESUFFIX 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,FALSE,FALSE,0,NULL,0,0.0,0.0

static const DisplayModeRec DDCEstablishedModes[17] = {
    { MODEPREFIX,    40000,  800,  840,  968, 1056, 0,  600,  601,  605,  628, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@60Hz */
    { MODEPREFIX,    36000,  800,  824,  896, 1024, 0,  600,  601,  603,  625, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@56Hz */
    { MODEPREFIX,    31500,  640,  656,  720,  840, 0,  480,  481,  484,  500, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@75Hz */
    { MODEPREFIX,    31500,  640,  664,  704,  832, 0,  480,  489,  492,  520, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@72Hz */
    { MODEPREFIX,    30240,  640,  704,  768,  864, 0,  480,  483,  486,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@67Hz */
    { MODEPREFIX,    25175,  640,  656,  752,  800, 0,  480,  490,  492,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@60Hz */
    { MODEPREFIX,    35500,  720,  738,  846,  900, 0,  400,  421,  423,  449, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 720x400@88Hz */
    { MODEPREFIX,    28320,  720,  738,  846,  900, 0,  400,  412,  414,  449, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 720x400@70Hz */
    { MODEPREFIX,   135000, 1280, 1296, 1440, 1688, 0, 1024, 1025, 1028, 1066, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x1024@75Hz */
    { MODEPREFIX,    78750, 1024, 1040, 1136, 1312, 0,  768,  769,  772,  800, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1024x768@75Hz */
    { MODEPREFIX,    75000, 1024, 1048, 1184, 1328, 0,  768,  771,  777,  806, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 1024x768@70Hz */
    { MODEPREFIX,    65000, 1024, 1048, 1184, 1344, 0,  768,  771,  777,  806, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 1024x768@60Hz */
    { MODEPREFIX,    44900, 1024, 1032, 1208, 1264, 0,  768,  768,  772,  817, 0, V_PHSYNC | V_PVSYNC | V_INTERLACE, MODESUFFIX }, /* 1024x768@43Hz */
    { MODEPREFIX,    57284,  832,  864,  928, 1152, 0,  624,  625,  628,  667, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 832x624@75Hz */
    { MODEPREFIX,    49500,  800,  816,  896, 1056, 0,  600,  601,  604,  625, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@75Hz */
    { MODEPREFIX,    50000,  800,  856,  976, 1040, 0,  600,  637,  643,  666, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@72Hz */
    { MODEPREFIX,   108000, 1152, 1216, 1344, 1600, 0,  864,  865,  868,  900, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1152x864@75Hz */
};

static DisplayModePtr
DDCModesFromEstablished(int scrnIndex, struct established_timings *timing,
			ddc_quirk_t quirks)
{
    DisplayModePtr Modes = NULL, Mode = NULL;
    CARD32 bits = (timing->t1) | (timing->t2 << 8) |
        ((timing->t_manu & 0x80) << 9);
    int i;

    for (i = 0; i < 17; i++) {
        if (bits & (0x01 << i)) {
            Mode = xf86DuplicateMode(&DDCEstablishedModes[i]);
            Modes = xf86ModesAdd(Modes, Mode);
        }
    }

    return Modes;
}

/* Autogenerated from the DMT spec */
const DisplayModeRec DMTModes[] = {
    { MODEPREFIX,    31500,  640,  672,  736,  832, 0,  350,  382,  385,  445, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x350@85Hz */
    { MODEPREFIX,    31500,  640,  672,  736,  832, 0,  400,  401,  404,  445, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 640x400@85Hz */
    { MODEPREFIX,    35500,  720,  756,  828,  936, 0,  400,  401,  404,  446, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 720x400@85Hz */
    { MODEPREFIX,    25175,  640,  656,  752,  800, 0,  480,  490,  492,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@60Hz */
    { MODEPREFIX,    31500,  640,  664,  704,  832, 0,  480,  489,  492,  520, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@72Hz */
    { MODEPREFIX,    31500,  640,  656,  720,  840, 0,  480,  481,  484,  500, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@75Hz */
    { MODEPREFIX,    36000,  640,  696,  752,  832, 0,  480,  481,  484,  509, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 640x480@85Hz */
    { MODEPREFIX,    36000,  800,  824,  896, 1024, 0,  600,  601,  603,  625, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@56Hz */
    { MODEPREFIX,    40000,  800,  840,  968, 1056, 0,  600,  601,  605,  628, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@60Hz */
    { MODEPREFIX,    50000,  800,  856,  976, 1040, 0,  600,  637,  643,  666, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@72Hz */
    { MODEPREFIX,    49500,  800,  816,  896, 1056, 0,  600,  601,  604,  625, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@75Hz */
    { MODEPREFIX,    56250,  800,  832,  896, 1048, 0,  600,  601,  604,  631, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 800x600@85Hz */
    { MODEPREFIX,    73250,  800,  848,  880,  960, 0,  600,  603,  607,  636, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 800x600@120Hz RB */
    { MODEPREFIX,    33750,  848,  864,  976, 1088, 0,  480,  486,  494,  517, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 848x480@60Hz */
    { MODEPREFIX,    44900, 1024, 1032, 1208, 1264, 0,  768,  768,  772,  817, 0, V_PHSYNC | V_PVSYNC | V_INTERLACE, MODESUFFIX }, /* 1024x768@43Hz (interlaced) */
    { MODEPREFIX,    65000, 1024, 1048, 1184, 1344, 0,  768,  771,  777,  806, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 1024x768@60Hz */
    { MODEPREFIX,    75000, 1024, 1048, 1184, 1328, 0,  768,  771,  777,  806, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* 1024x768@70Hz */
    { MODEPREFIX,    78750, 1024, 1040, 1136, 1312, 0,  768,  769,  772,  800, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1024x768@75Hz */
    { MODEPREFIX,    94500, 1024, 1072, 1168, 1376, 0,  768,  769,  772,  808, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1024x768@85Hz */
    { MODEPREFIX,   115500, 1024, 1072, 1104, 1184, 0,  768,  771,  775,  813, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1024x768@120Hz RB */
    { MODEPREFIX,   108000, 1152, 1216, 1344, 1600, 0,  864,  865,  868,  900, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1152x864@75Hz */
    { MODEPREFIX,    68250, 1280, 1328, 1360, 1440, 0,  768,  771,  778,  790, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1280x768@60Hz RB */
    { MODEPREFIX,    79500, 1280, 1344, 1472, 1664, 0,  768,  771,  778,  798, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x768@60Hz */
    { MODEPREFIX,   102250, 1280, 1360, 1488, 1696, 0,  768,  771,  778,  805, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x768@75Hz */
    { MODEPREFIX,   117500, 1280, 1360, 1496, 1712, 0,  768,  771,  778,  809, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x768@85Hz */
    { MODEPREFIX,   140250, 1280, 1328, 1360, 1440, 0,  768,  771,  778,  813, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1280x768@120Hz RB */
    { MODEPREFIX,    71000, 1280, 1328, 1360, 1440, 0,  800,  803,  809,  823, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1280x800@60Hz RB */
    { MODEPREFIX,    83500, 1280, 1352, 1480, 1680, 0,  800,  803,  809,  831, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x800@60Hz */
    { MODEPREFIX,   106500, 1280, 1360, 1488, 1696, 0,  800,  803,  809,  838, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x800@75Hz */
    { MODEPREFIX,   122500, 1280, 1360, 1496, 1712, 0,  800,  803,  809,  843, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x800@85Hz */
    { MODEPREFIX,   146250, 1280, 1328, 1360, 1440, 0,  800,  803,  809,  847, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1280x800@120Hz RB */
    { MODEPREFIX,   108000, 1280, 1376, 1488, 1800, 0,  960,  961,  964, 1000, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x960@60Hz */
    { MODEPREFIX,   148500, 1280, 1344, 1504, 1728, 0,  960,  961,  964, 1011, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x960@85Hz */
    { MODEPREFIX,   175500, 1280, 1328, 1360, 1440, 0,  960,  963,  967, 1017, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1280x960@120Hz RB */
    { MODEPREFIX,   108000, 1280, 1328, 1440, 1688, 0, 1024, 1025, 1028, 1066, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x1024@60Hz */
    { MODEPREFIX,   135000, 1280, 1296, 1440, 1688, 0, 1024, 1025, 1028, 1066, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x1024@75Hz */
    { MODEPREFIX,   157500, 1280, 1344, 1504, 1728, 0, 1024, 1025, 1028, 1072, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1280x1024@85Hz */
    { MODEPREFIX,   187250, 1280, 1328, 1360, 1440, 0, 1024, 1027, 1034, 1084, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1280x1024@120Hz RB */
    { MODEPREFIX,    85500, 1360, 1424, 1536, 1792, 0,  768,  771,  777,  795, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1360x768@60Hz */
    { MODEPREFIX,   148250, 1360, 1408, 1440, 1520, 0,  768,  771,  776,  813, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1360x768@120Hz RB */
    { MODEPREFIX,   101000, 1400, 1448, 1480, 1560, 0, 1050, 1053, 1057, 1080, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1400x1050@60Hz RB */
    { MODEPREFIX,   121750, 1400, 1488, 1632, 1864, 0, 1050, 1053, 1057, 1089, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1400x1050@60Hz */
    { MODEPREFIX,   156000, 1400, 1504, 1648, 1896, 0, 1050, 1053, 1057, 1099, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1400x1050@75Hz */
    { MODEPREFIX,   179500, 1400, 1504, 1656, 1912, 0, 1050, 1053, 1057, 1105, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1400x1050@85Hz */
    { MODEPREFIX,   208000, 1400, 1448, 1480, 1560, 0, 1050, 1053, 1057, 1112, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1400x1050@120Hz RB */
    { MODEPREFIX,    88750, 1440, 1488, 1520, 1600, 0,  900,  903,  909,  926, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1440x900@60Hz RB */
    { MODEPREFIX,   106500, 1440, 1520, 1672, 1904, 0,  900,  903,  909,  934, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1440x900@60Hz */
    { MODEPREFIX,   136750, 1440, 1536, 1688, 1936, 0,  900,  903,  909,  942, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1440x900@75Hz */
    { MODEPREFIX,   157000, 1440, 1544, 1696, 1952, 0,  900,  903,  909,  948, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1440x900@85Hz */
    { MODEPREFIX,   182750, 1440, 1488, 1520, 1600, 0,  900,  903,  909,  953, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1440x900@120Hz RB */
    { MODEPREFIX,   162000, 1600, 1664, 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1600x1200@60Hz */
    { MODEPREFIX,   175500, 1600, 1664, 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1600x1200@65Hz */
    { MODEPREFIX,   189000, 1600, 1664, 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1600x1200@70Hz */
    { MODEPREFIX,   202500, 1600, 1664, 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1600x1200@75Hz */
    { MODEPREFIX,   229500, 1600, 1664, 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 1600x1200@85Hz */
    { MODEPREFIX,   268250, 1600, 1648, 1680, 1760, 0, 1200, 1203, 1207, 1271, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1600x1200@120Hz RB */
    { MODEPREFIX,   119000, 1680, 1728, 1760, 1840, 0, 1050, 1053, 1059, 1080, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1680x1050@60Hz RB */
    { MODEPREFIX,   146250, 1680, 1784, 1960, 2240, 0, 1050, 1053, 1059, 1089, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1680x1050@60Hz */
    { MODEPREFIX,   187000, 1680, 1800, 1976, 2272, 0, 1050, 1053, 1059, 1099, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1680x1050@75Hz */
    { MODEPREFIX,   214750, 1680, 1808, 1984, 2288, 0, 1050, 1053, 1059, 1105, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1680x1050@85Hz */
    { MODEPREFIX,   245500, 1680, 1728, 1760, 1840, 0, 1050, 1053, 1059, 1112, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1680x1050@120Hz RB */
    { MODEPREFIX,   204750, 1792, 1920, 2120, 2448, 0, 1344, 1345, 1348, 1394, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1792x1344@60Hz */
    { MODEPREFIX,   261000, 1792, 1888, 2104, 2456, 0, 1344, 1345, 1348, 1417, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1792x1344@75Hz */
    { MODEPREFIX,   333250, 1792, 1840, 1872, 1952, 0, 1344, 1347, 1351, 1423, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1792x1344@120Hz RB */
    { MODEPREFIX,   218250, 1856, 1952, 2176, 2528, 0, 1392, 1393, 1396, 1439, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1856x1392@60Hz */
    { MODEPREFIX,   288000, 1856, 1984, 2208, 2560, 0, 1392, 1393, 1396, 1500, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1856x1392@75Hz */
    { MODEPREFIX,   356500, 1856, 1904, 1936, 2016, 0, 1392, 1395, 1399, 1474, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1856x1392@120Hz RB */
    { MODEPREFIX,   154000, 1920, 1968, 2000, 2080, 0, 1200, 1203, 1209, 1235, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1920x1200@60Hz RB */
    { MODEPREFIX,   193250, 1920, 2056, 2256, 2592, 0, 1200, 1203, 1209, 1245, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1920x1200@60Hz */
    { MODEPREFIX,   245250, 1920, 2056, 2264, 2608, 0, 1200, 1203, 1209, 1255, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1920x1200@75Hz */
    { MODEPREFIX,   281250, 1920, 2064, 2272, 2624, 0, 1200, 1203, 1209, 1262, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1920x1200@85Hz */
    { MODEPREFIX,   317000, 1920, 1968, 2000, 2080, 0, 1200, 1203, 1209, 1271, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1920x1200@120Hz RB */
    { MODEPREFIX,   234000, 1920, 2048, 2256, 2600, 0, 1440, 1441, 1444, 1500, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1920x1440@60Hz */
    { MODEPREFIX,   297000, 1920, 2064, 2288, 2640, 0, 1440, 1441, 1444, 1500, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 1920x1440@75Hz */
    { MODEPREFIX,   380500, 1920, 1968, 2000, 2080, 0, 1440, 1443, 1447, 1525, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 1920x1440@120Hz RB */
    { MODEPREFIX,   268500, 2560, 2608, 2640, 2720, 0, 1600, 1603, 1609, 1646, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 2560x1600@60Hz RB */
    { MODEPREFIX,   348500, 2560, 2752, 3032, 3504, 0, 1600, 1603, 1609, 1658, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 2560x1600@60Hz */
    { MODEPREFIX,   443250, 2560, 2768, 3048, 3536, 0, 1600, 1603, 1609, 1672, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 2560x1600@75Hz */
    { MODEPREFIX,   505250, 2560, 2768, 3048, 3536, 0, 1600, 1603, 1609, 1682, 0, V_NHSYNC | V_PVSYNC, MODESUFFIX }, /* 2560x1600@85Hz */
    { MODEPREFIX,   552750, 2560, 2608, 2640, 2720, 0, 1600, 1603, 1609, 1694, 0, V_PHSYNC | V_NVSYNC, MODESUFFIX }, /* 2560x1600@120Hz RB */
};

#define LEVEL_DMT 0
#define LEVEL_GTF 1
#define LEVEL_CVT 2

static int
MonitorStandardTimingLevel(xf86MonPtr DDC)
{
    if (DDC->ver.revision >= 2) {
	if (DDC->ver.revision >= 4 && CVT_SUPPORTED(DDC->features.msc)) {
	    return LEVEL_CVT;
	}
	return LEVEL_GTF;
    }
    return LEVEL_DMT;
}

static int
ModeRefresh(const DisplayModeRec *mode)
{
    return (int)(xf86ModeVRefresh(mode) + 0.5);
}

/*
 * If rb is not set, then we'll not consider reduced-blanking modes as
 * part of the DMT pool.  For the 'standard' EDID mode descriptor there's
 * no way to specify whether the mode should be RB or not.
 */
DisplayModePtr
FindDMTMode(int hsize, int vsize, int refresh, Bool rb)
{
    int i;
    const DisplayModeRec *ret;

    for (i = 0; i < sizeof(DMTModes) / sizeof(DisplayModeRec); i++) {
	ret = &DMTModes[i];

	if (!rb && xf86ModeIsReduced(ret))
	    continue;

	if (ret->HDisplay == hsize &&
	    ret->VDisplay == vsize &&
	    refresh == ModeRefresh(ret))
	    return xf86DuplicateMode(ret);
    }

    return NULL;
}

/*
 * Appendix B of the EDID 1.4 spec defines the right thing to do here.
 * If the timing given here matches a mode defined in the VESA DMT standard,
 * we _must_ use that.  If the device supports CVT modes, then we should
 * generate a CVT timing.  If both of the above fail, use GTF.
 *
 * There are some wrinkles here.  EDID 1.1 and 1.0 sinks can't really
 * "support" GTF, since it wasn't a standard yet; so if they ask for a
 * timing in this section that isn't defined in DMT, returning a GTF mode
 * may not actually be valid.  EDID 1.3 sinks often report support for
 * some CVT modes, but they are not required to support CVT timings for
 * modes in the standard timing descriptor, so we should _not_ treat them
 * as CVT-compliant (unless specified in an extension block I suppose).
 *
 * EDID 1.4 requires that all sink devices support both GTF and CVT timings
 * for modes in this section, but does say that CVT is preferred.
 */
static DisplayModePtr
DDCModesFromStandardTiming(struct std_timings *timing, ddc_quirk_t quirks,
			   int timing_level, Bool rb)
{
    DisplayModePtr Modes = NULL, Mode = NULL;
    int i, hsize, vsize, refresh;

    for (i = 0; i < STD_TIMINGS; i++) {
	hsize = timing[i].hsize;
	vsize = timing[i].vsize;
	refresh = timing[i].refresh;

	/* HDTV hack, because you can't say 1366 */
	if (refresh == 60 &&
	    ((hsize == 1360 && vsize == 765) ||
	     (hsize == 1368 && vsize == 769))) {
	    Mode = xf86CVTMode(1366, 768, 60, FALSE, FALSE);
	    Mode->HDisplay = 1366;
	    Mode->HSyncStart--;
	    Mode->HSyncEnd--;
	} else if (hsize && vsize && refresh) {
	    Mode = FindDMTMode(hsize, vsize, refresh, rb);

	    if (!Mode) {
		if (timing_level == LEVEL_CVT)
		    /* pass rb here too? */
		    Mode = xf86CVTMode(hsize, vsize, refresh, FALSE, FALSE);
		else if (timing_level == LEVEL_GTF)
		    Mode = xf86GTFMode(hsize, vsize, refresh, FALSE, FALSE);
	    }

	}

	if (Mode) {
	    Mode->type = M_T_DRIVER;
	    Modes = xf86ModesAdd(Modes, Mode);
	}
	Mode = NULL;
    }

    return Modes;
}

static void
DDCModeDoInterlaceQuirks(DisplayModePtr mode)
{
    /*
     * EDID is delightfully ambiguous about how interlaced modes are to be
     * encoded.  X's internal representation is of frame height, but some
     * HDTV detailed timings are encoded as field height.
     *
     * The format list here is from CEA, in frame size.  Technically we
     * should be checking refresh rate too.  Whatever.
     */
    static const struct {
	int w, h;
    } cea_interlaced[] = {
	{ 1920, 1080 },
	{  720,  480 },
	{ 1440,  480 },
	{ 2880,  480 },
	{  720,  576 },
	{ 1440,  576 },
	{ 2880,  576 },
    };
    static const int n_modes = sizeof(cea_interlaced)/sizeof(cea_interlaced[0]);
    int i;

    for (i = 0; i < n_modes; i++) {
	if ((mode->HDisplay == cea_interlaced[i].w) &&
	    (mode->VDisplay == cea_interlaced[i].h / 2)) {
	    mode->VDisplay *= 2;
	    mode->VSyncStart *= 2;
	    mode->VSyncEnd *= 2;
	    mode->VTotal *= 2;
	    mode->VTotal |= 1;
	}
    }

    mode->Flags |= V_INTERLACE;
}

/*
 *
 */
static DisplayModePtr
DDCModeFromDetailedTiming(int scrnIndex, struct detailed_timings *timing,
			  Bool preferred, ddc_quirk_t quirks)
{
    DisplayModePtr Mode;

    /*
     * Refuse to create modes that are insufficiently large.  64 is a random
     * number, maybe the spec says something about what the minimum is.  In
     * particular I see this frequently with _old_ EDID, 1.0 or so, so maybe
     * our parser is just being too aggresive there.
     */
    if (timing->h_active < 64 || timing->v_active < 64) {
	xf86DrvMsg(scrnIndex, X_INFO,
		   "%s: Ignoring tiny %dx%d mode\n", __func__,
		   timing->h_active, timing->v_active);
	return NULL;
    }

    /* We don't do stereo */
    if (timing->stereo) {
        xf86DrvMsg(scrnIndex, X_INFO,
		   "%s: Ignoring: We don't handle stereo.\n", __func__);
        return NULL;
    }

    /* We only do seperate sync currently */
    if (timing->sync != 0x03) {
         xf86DrvMsg(scrnIndex, X_INFO,
		    "%s: %dx%d Warning: We only handle separate"
                    " sync.\n", __func__, timing->h_active, timing->v_active);
    }

    Mode = xnfcalloc(1, sizeof(DisplayModeRec));

    Mode->type = M_T_DRIVER;
    if (preferred)
	Mode->type |= M_T_PREFERRED;

    if( ( quirks & DDC_QUIRK_135_CLOCK_TOO_HIGH ) &&
	timing->clock == 135000000 )
        Mode->Clock = 108880;
    else
        Mode->Clock = timing->clock / 1000.0;

    Mode->HDisplay = timing->h_active;
    Mode->HSyncStart = timing->h_active + timing->h_sync_off;
    Mode->HSyncEnd = Mode->HSyncStart + timing->h_sync_width;
    Mode->HTotal = timing->h_active + timing->h_blanking;

    Mode->VDisplay = timing->v_active;
    Mode->VSyncStart = timing->v_active + timing->v_sync_off;
    Mode->VSyncEnd = Mode->VSyncStart + timing->v_sync_width;
    Mode->VTotal = timing->v_active + timing->v_blanking;

    /* perform basic check on the detail timing */
    if (Mode->HSyncEnd > Mode->HTotal || Mode->VSyncEnd > Mode->VTotal) {
	free(Mode);
	return NULL;
    }

    /* We ignore h/v_size and h/v_border for now. */

    if (timing->interlaced)
	DDCModeDoInterlaceQuirks(Mode);

    if (quirks & DDC_QUIRK_DETAILED_SYNC_PP)
	Mode->Flags |= V_PVSYNC | V_PHSYNC;
    else {
	if (timing->misc & 0x02)
	    Mode->Flags |= V_PVSYNC;
	else
	    Mode->Flags |= V_NVSYNC;

	if (timing->misc & 0x01)
	    Mode->Flags |= V_PHSYNC;
	else
	    Mode->Flags |= V_NHSYNC;
    }

    xf86SetModeDefaultName(Mode);

    return Mode;
}

static DisplayModePtr
DDCModesFromCVT(int scrnIndex, struct cvt_timings *t)
{
    DisplayModePtr modes = NULL;
    int i;

    for (i = 0; i < 4; i++) {
	if (t[i].height) {
	    if (t[i].rates & 0x10)
		modes = xf86ModesAdd(modes,
			xf86CVTMode(t[i].width, t[i].height, 50, 0, 0));
	    if (t[i].rates & 0x08)
		modes = xf86ModesAdd(modes,
			xf86CVTMode(t[i].width, t[i].height, 60, 0, 0));
	    if (t[i].rates & 0x04)
		modes = xf86ModesAdd(modes,
			xf86CVTMode(t[i].width, t[i].height, 75, 0, 0));
	    if (t[i].rates & 0x02)
		modes = xf86ModesAdd(modes,
			xf86CVTMode(t[i].width, t[i].height, 85, 0, 0));
	    if (t[i].rates & 0x01)
		modes = xf86ModesAdd(modes,
			xf86CVTMode(t[i].width, t[i].height, 60, 1, 0));
	} else break;
    }

    return modes;
}

static const struct {
    short w;
    short h;
    short r;
    short rb;
} EstIIIModes[] = {
    /* byte 6 */
    { 640, 350, 85, 0 },
    { 640, 400, 85, 0 },
    { 720, 400, 85, 0 },
    { 640, 480, 85, 0 },
    { 848, 480, 60, 0 },
    { 800, 600, 85, 0 },
    { 1024, 768, 85, 0 },
    { 1152, 864, 75, 0 },
    /* byte 7 */
    { 1280, 768, 60, 1 },
    { 1280, 768, 60, 0 },
    { 1280, 768, 75, 0 },
    { 1280, 768, 85, 0 },
    { 1280, 960, 60, 0 },
    { 1280, 960, 85, 0 },
    { 1280, 1024, 60, 0 },
    { 1280, 1024, 85, 0 },
    /* byte 8 */
    { 1360, 768, 60, 0 },
    { 1440, 900, 60, 1 },
    { 1440, 900, 60, 0 },
    { 1440, 900, 75, 0 },
    { 1440, 900, 85, 0 },
    { 1400, 1050, 60, 1 },
    { 1400, 1050, 60, 0 },
    { 1400, 1050, 75, 0 },
    /* byte 9 */
    { 1400, 1050, 85, 0 },
    { 1680, 1050, 60, 1 },
    { 1680, 1050, 60, 0 },
    { 1680, 1050, 75, 0 },
    { 1680, 1050, 85, 0 },
    { 1600, 1200, 60, 0 },
    { 1600, 1200, 65, 0 },
    { 1600, 1200, 70, 0 },
    /* byte 10 */
    { 1600, 1200, 75, 0 },
    { 1600, 1200, 85, 0 },
    { 1792, 1344, 60, 0 },
    { 1792, 1344, 85, 0 },
    { 1856, 1392, 60, 0 },
    { 1856, 1392, 75, 0 },
    { 1920, 1200, 60, 1 },
    { 1920, 1200, 60, 0 },
    /* byte 11 */
    { 1920, 1200, 75, 0 },
    { 1920, 1200, 85, 0 },
    { 1920, 1440, 60, 0 },
    { 1920, 1440, 75, 0 },
};

static DisplayModePtr
DDCModesFromEstIII(unsigned char *est)
{
    DisplayModePtr modes = NULL;
    int i, j, m;

    for (i = 0; i < 6; i++) {
	for (j = 7; j > 0; j--) {
	    if (est[i] & (1 << j)) {
		m = (i * 8) + (7 - j);
		modes = xf86ModesAdd(modes,
				     FindDMTMode(EstIIIModes[m].w,
						 EstIIIModes[m].h,
						 EstIIIModes[m].r,
						 EstIIIModes[m].rb));
	    }
	}
    }

    return modes;
}

/*
 * This is only valid when the sink claims to be continuous-frequency
 * but does not supply a detailed range descriptor.  Such sinks are
 * arguably broken.  Currently the mode validation code isn't aware of
 * this; the non-RANDR code even punts the decision of optional sync
 * range checking to the driver.  Loss.
 */
static void
DDCGuessRangesFromModes(int scrnIndex, MonPtr Monitor, DisplayModePtr Modes)
{
    DisplayModePtr Mode = Modes;

    if (!Monitor || !Modes)
        return;

    /* set up the ranges for scanning through the modes */
    Monitor->nHsync = 1;
    Monitor->hsync[0].lo = 1024.0;
    Monitor->hsync[0].hi = 0.0;

    Monitor->nVrefresh = 1;
    Monitor->vrefresh[0].lo = 1024.0;
    Monitor->vrefresh[0].hi = 0.0;

    while (Mode) {
        if (!Mode->HSync)
            Mode->HSync = ((float) Mode->Clock ) / ((float) Mode->HTotal);

        if (!Mode->VRefresh)
            Mode->VRefresh = (1000.0 * ((float) Mode->Clock)) / 
                ((float) (Mode->HTotal * Mode->VTotal));

        if (Mode->HSync < Monitor->hsync[0].lo)
            Monitor->hsync[0].lo = Mode->HSync;

        if (Mode->HSync > Monitor->hsync[0].hi)
            Monitor->hsync[0].hi = Mode->HSync;

        if (Mode->VRefresh < Monitor->vrefresh[0].lo)
            Monitor->vrefresh[0].lo = Mode->VRefresh;

        if (Mode->VRefresh > Monitor->vrefresh[0].hi)
            Monitor->vrefresh[0].hi = Mode->VRefresh;

        Mode = Mode->next;
    }
}

ddc_quirk_t
xf86DDCDetectQuirks(int scrnIndex, xf86MonPtr DDC, Bool verbose)
{
    ddc_quirk_t	quirks;
    int i;

    quirks = DDC_QUIRK_NONE;
    for (i = 0; ddc_quirks[i].detect; i++) {
	if (ddc_quirks[i].detect (scrnIndex, DDC)) {
	    if (verbose) {
		xf86DrvMsg (scrnIndex, X_INFO, "    EDID quirk: %s\n",
			    ddc_quirks[i].description);
	    }
	    quirks |= ddc_quirks[i].quirk;
	}
    }

    return quirks;
}

void xf86DetTimingApplyQuirks(struct detailed_monitor_section *det_mon,
                              ddc_quirk_t quirks,
                              int hsize, int vsize)
{
    if (det_mon->type != DT)
        return;

    if (quirks & DDC_QUIRK_DETAILED_H_IN_CM)
        det_mon->section.d_timings.h_size *= 10;

    if (quirks & DDC_QUIRK_DETAILED_V_IN_CM)
        det_mon->section.d_timings.v_size *= 10;

    if (quirks & DDC_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
        det_mon->section.d_timings.h_size = 10 * hsize;
        det_mon->section.d_timings.v_size = 10 * vsize;
    }
}

/**
 * Applies monitor-specific quirks to the decoded EDID information.
 *
 * Note that some quirks applying to the mode list are still implemented in
 * xf86DDCGetModes.
 */
void
xf86DDCApplyQuirks(int scrnIndex, xf86MonPtr DDC)
{
    ddc_quirk_t quirks = xf86DDCDetectQuirks (scrnIndex, DDC, FALSE);
    int i;

    for (i = 0; i < DET_TIMINGS; i++) {
        xf86DetTimingApplyQuirks(DDC->det_mon + i, quirks,
                                 DDC->features.hsize,
                                 DDC->features.vsize);
    }
}

/**
 * Walks the modes list, finding the mode with the largest area which is
 * closest to the target refresh rate, and marks it as the only preferred mode.
*/
static void
xf86DDCSetPreferredRefresh(int scrnIndex, DisplayModePtr modes,
			   float target_refresh)
{
	DisplayModePtr	mode, best = modes;

	for (mode = modes; mode; mode = mode->next)
	{
	    mode->type &= ~M_T_PREFERRED;

	    if (mode == best) continue;

	    if (mode->HDisplay * mode->VDisplay >
		best->HDisplay * best->VDisplay)
	    {
		best = mode;
		continue;
	    }
	    if (mode->HDisplay * mode->VDisplay ==
		best->HDisplay * best->VDisplay)
	    {
		double	mode_refresh = xf86ModeVRefresh (mode);
		double	best_refresh = xf86ModeVRefresh (best);
		double	mode_dist = fabs(mode_refresh - target_refresh);
		double	best_dist = fabs(best_refresh - target_refresh);

		if (mode_dist < best_dist)
		{
		    best = mode;
		    continue;
		}
	    }
	}
	if (best)
	    best->type |= M_T_PREFERRED;
}

#define CEA_VIDEO_MODES_NUM  64
static const DisplayModeRec CEAVideoModes[CEA_VIDEO_MODES_NUM] = {
    { MODEPREFIX,    25175,  640,  656,  752,  800, 0,  480,  490,  492,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 1:640x480@60Hz */
    { MODEPREFIX,    27000,  720,  736,  798,  858, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 2:720x480@60Hz */
    { MODEPREFIX,    27000,  720,  736,  798,  858, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 3:720x480@60Hz */
    { MODEPREFIX,    74250, 1280, 1390, 1430, 1650, 0,  720,  725,  730,  750, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 4: 1280x720@60Hz */
    { MODEPREFIX,    74250, 1920, 2008, 2052, 2200, 0, 1080, 1084, 1094, 1125, 0, V_PHSYNC | V_PVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 5:1920x1080i@60Hz */
    { MODEPREFIX,    27000, 1440, 1478, 1602, 1716, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 6:1440x480i@60Hz */
    { MODEPREFIX,    27000, 1440, 1478, 1602, 1716, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 7:1440x480i@60Hz */
    { MODEPREFIX,    27000, 1440, 1478, 1602, 1716, 0,  240,  244,  247,  262, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 8:1440x240@60Hz */
    { MODEPREFIX,    27000, 1440, 1478, 1602, 1716, 0,  240,  244,  247,  262, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 9:1440x240@60Hz */
    { MODEPREFIX,    54000, 2880, 2956, 3204, 3432, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 10:2880x480i@60Hz */
    { MODEPREFIX,    54000, 2880, 2956, 3204, 3432, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 11:2880x480i@60Hz */
    { MODEPREFIX,    54000, 2880, 2956, 3204, 3432, 0,  240,  244,  247,  262, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 12:2880x240@60Hz */
    { MODEPREFIX,    54000, 2880, 2956, 3204, 3432, 0,  240,  244,  247,  262, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 13:2880x240@60Hz */
    { MODEPREFIX,    54000, 1440, 1472, 1596, 1716, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 14:1440x480@60Hz */
    { MODEPREFIX,    54000, 1440, 1472, 1596, 1716, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 15:1440x480@60Hz */
    { MODEPREFIX,   148500, 1920, 2008, 2052, 2200, 0, 1080, 1084, 1089, 1125, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 16:1920x1080@60Hz */
    { MODEPREFIX,    27000,  720,  732,  796,  864, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 17:720x576@50Hz */
    { MODEPREFIX,    27000,  720,  732,  796,  864, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 18:720x576@50Hz */
    { MODEPREFIX,    74250, 1280, 1720, 1760, 1980, 0,  720,  725,  730,  750, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 19: 1280x720@50Hz */
    { MODEPREFIX,    74250, 1920, 2448, 2492, 2640, 0, 1080, 1084, 1094, 1125, 0, V_PHSYNC | V_PVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 20:1920x1080i@50Hz */
    { MODEPREFIX,    27000, 1440, 1464, 1590, 1728, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 21:1440x576i@50Hz */
    { MODEPREFIX,    27000, 1440, 1464, 1590, 1728, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 22:1440x576i@50Hz */
    { MODEPREFIX,    27000, 1440, 1464, 1590, 1728, 0,  288,  290,  293,  312, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 23:1440x288@50Hz */
    { MODEPREFIX,    27000, 1440, 1464, 1590, 1728, 0,  288,  290,  293,  312, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 24:1440x288@50Hz */
    { MODEPREFIX,    54000, 2880, 2928, 3180, 3456, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 25:2880x576i@50Hz */
    { MODEPREFIX,    54000, 2880, 2928, 3180, 3456, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 26:2880x576i@50Hz */
    { MODEPREFIX,    54000, 2880, 2928, 3180, 3456, 0,  288,  290,  293,  312, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 27:2880x288@50Hz */
    { MODEPREFIX,    54000, 2880, 2928, 3180, 3456, 0,  288,  290,  293,  312, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 28:2880x288@50Hz */
    { MODEPREFIX,    54000, 1440, 1464, 1592, 1728, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 29:1440x576@50Hz */
    { MODEPREFIX,    54000, 1440, 1464, 1592, 1728, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 30:1440x576@50Hz */
    { MODEPREFIX,   148500, 1920, 2448, 2492, 2640, 0, 1080, 1084, 1089, 1125, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 31:1920x1080@50Hz */
    { MODEPREFIX,    74250, 1920, 2558, 2602, 2750, 0, 1080, 1084, 1089, 1125, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 32:1920x1080@24Hz */
    { MODEPREFIX,    74250, 1920, 2448, 2492, 2640, 0, 1080, 1084, 1089, 1125, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 33:1920x1080@25Hz */
    { MODEPREFIX,    74250, 1920, 2008, 2052, 2200, 0, 1080, 1084, 1089, 1125, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 34:1920x1080@30Hz */
    { MODEPREFIX,   108000, 2880, 2944, 3192, 3432, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 35:2880x480@60Hz */
    { MODEPREFIX,   108000, 2880, 2944, 3192, 3432, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 36:2880x480@60Hz */
    { MODEPREFIX,   108000, 2880, 2928, 3184, 3456, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 37:2880x576@50Hz */
    { MODEPREFIX,   108000, 2880, 2928, 3184, 3456, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 38:2880x576@50Hz */
    { MODEPREFIX,    72000, 1920, 1952, 2120, 2304, 0, 1080, 1126, 1136, 1250, 0, V_PHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 39:1920x1080i@50Hz */
    { MODEPREFIX,   148500, 1920, 2448, 2492, 2640, 0, 1080, 1084, 1094, 1125, 0, V_PHSYNC | V_PVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 40:1920x1080i@100Hz */
    { MODEPREFIX,   148500, 1280, 1720, 1760, 1980, 0,  720,  725,  730,  750, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 41:1280x720@100Hz */
    { MODEPREFIX,    54000,  720,  732,  796,  864, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 42:720x576@100Hz */
    { MODEPREFIX,    54000,  720,  732,  796,  864, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 43:720x576@100Hz */
    { MODEPREFIX,    54000, 1440, 1464, 1590, 1728, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 44:1440x576i@100Hz */
    { MODEPREFIX,    54000, 1440, 1464, 1590, 1728, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 45:1440x576i@100Hz */
    { MODEPREFIX,   148500, 1920, 2008, 2052, 2200, 0, 1080, 1084, 1094, 1125, 0, V_PHSYNC | V_PVSYNC | V_INTERLACE, MODESUFFIX }, /* VIC 46:1920x1080i@120Hz */
    { MODEPREFIX,   148500, 1280, 1390, 1430, 1650, 0,  720,  725,  730,  750, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 47:1280x720@120Hz */
    { MODEPREFIX,    54000,  720,  736,  798,  858, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 48:720x480@120Hz */
    { MODEPREFIX,    54000,  720,  736,  798,  858, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 49:720x480@120Hz */
    { MODEPREFIX,    54000, 1440, 1478, 1602, 1716, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX },/* VIC 50:1440x480i@120Hz */
    { MODEPREFIX,    54000, 1440, 1478, 1602, 1716, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX },/* VIC 51:1440x480i@120Hz */
    { MODEPREFIX,   108000,  720,  732,  796,  864, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 52:720x576@200Hz */
    { MODEPREFIX,   108000,  720,  732,  796,  864, 0,  576,  581,  586,  625, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 53:720x576@200Hz */
    { MODEPREFIX,   108000, 1440, 1464, 1590, 1728, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX },/* VIC 54:1440x576i@200Hz */
    { MODEPREFIX,   108000, 1440, 1464, 1590, 1728, 0,  576,  580,  586,  625, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX },/* VIC 55:1440x576i@200Hz */
    { MODEPREFIX,   108000,  720,  736,  798,  858, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 56:720x480@240Hz */
    { MODEPREFIX,   108000,  720,  736,  798,  858, 0,  480,  489,  495,  525, 0, V_NHSYNC | V_NVSYNC, MODESUFFIX }, /* VIC 57:720x480@240Hz */
    { MODEPREFIX,   108000, 1440, 1478, 1602, 1716, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX },/* VIC 58:1440x480i@240 */
    { MODEPREFIX,   108000, 1440, 1478, 1602, 1716, 0,  480,  488,  494,  525, 0, V_NHSYNC | V_NVSYNC | V_INTERLACE, MODESUFFIX },/* VIC 59:1440x480i@240 */
    { MODEPREFIX,    59400, 1280, 3040, 3080, 3300, 0,  720,  725,  730,  750, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 60: 1280x720@24Hz */
    { MODEPREFIX,    74250, 1280, 3700, 3740, 3960, 0,  720,  725,  730,  750, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 61: 1280x720@25Hz */
    { MODEPREFIX,    74250, 1280, 3040, 3080, 3300, 0,  720,  725,  730,  750, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 62: 1280x720@30Hz */
    { MODEPREFIX,   297000, 1920, 2008, 2052, 2200, 0, 1080, 1084, 1089, 1125, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 63: 1920x1080@120Hz */
    { MODEPREFIX,   297000, 1920, 2448, 2492, 2640, 0, 1080, 1084, 1094, 1125, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* VIC 64:1920x1080@100Hz */
};

/* chose mode line by cea short video descriptor*/
static void handle_cea_svd(struct cea_video_block *video, void *data)
{
    DisplayModePtr Mode;
    DisplayModePtr *Modes = (DisplayModePtr *) data;
    int vid;

    vid = video ->video_code & 0x7f;
    if (vid < CEA_VIDEO_MODES_NUM) {
	Mode = xf86DuplicateMode(CEAVideoModes + vid);
	*Modes = xf86ModesAdd(*Modes, Mode);
    }
}

static DisplayModePtr
DDCModesFromCEAExtension(int scrnIndex, xf86MonPtr MonPtr)
{
    DisplayModePtr Modes = NULL;

    xf86ForEachVideoBlock(MonPtr,
                          handle_cea_svd,
                          &Modes);

    return Modes;
}

struct det_modes_parameter {
    xf86MonPtr DDC;
    ddc_quirk_t quirks;
    DisplayModePtr  Modes;
    Bool rb;
    Bool preferred;
    int timing_level;
};

static void handle_detailed_modes(struct detailed_monitor_section *det_mon,
	                          void *data)
{
    DisplayModePtr  Mode;
    struct det_modes_parameter *p = (struct det_modes_parameter *)data;

    xf86DetTimingApplyQuirks(det_mon,p->quirks,
                             p->DDC->features.hsize,
                             p->DDC->features.vsize);

    switch (det_mon->type) {
    case DT:
        Mode = DDCModeFromDetailedTiming(p->DDC->scrnIndex,
                                         &det_mon->section.d_timings,
                                         p->preferred,
                                         p->quirks);
        p->preferred = FALSE;
        p->Modes = xf86ModesAdd(p->Modes, Mode);
        break;
    case DS_STD_TIMINGS:
        Mode = DDCModesFromStandardTiming(det_mon->section.std_t,
                                          p->quirks, p->timing_level,p->rb);
        p->Modes = xf86ModesAdd(p->Modes, Mode);
        break;
    case DS_CVT:
        Mode = DDCModesFromCVT(p->DDC->scrnIndex, det_mon->section.cvt);
        p->Modes = xf86ModesAdd(p->Modes, Mode);
        break;
    case DS_EST_III:
	Mode = DDCModesFromEstIII(det_mon->section.est_iii);
	p->Modes = xf86ModesAdd(p->Modes, Mode);
	break;
    default:
        break;
    }
}

DisplayModePtr
xf86DDCGetModes(int scrnIndex, xf86MonPtr DDC)
{
    DisplayModePtr  Modes = NULL, Mode;
    ddc_quirk_t	    quirks;
    Bool	    preferred, rb;
    int		    timing_level;
    struct det_modes_parameter p;

    xf86DrvMsg (scrnIndex, X_INFO, "EDID vendor \"%s\", prod id %d\n",
		DDC->vendor.name, DDC->vendor.prod_id);

    quirks = xf86DDCDetectQuirks(scrnIndex, DDC, TRUE);

    preferred = PREFERRED_TIMING_MODE(DDC->features.msc);
    if (DDC->ver.revision >= 4)
	preferred = TRUE;
    if (quirks & DDC_QUIRK_FIRST_DETAILED_PREFERRED)
	preferred = TRUE;
    if (quirks & (DDC_QUIRK_PREFER_LARGE_60 | DDC_QUIRK_PREFER_LARGE_75))
	preferred = FALSE;

    rb = xf86MonitorSupportsReducedBlanking(DDC);

    timing_level = MonitorStandardTimingLevel(DDC);

    p.quirks = quirks;
    p.DDC = DDC;
    p.Modes = Modes;
    p.rb = rb;
    p.preferred = preferred;
    p.timing_level = timing_level;
    xf86ForEachDetailedBlock(DDC, handle_detailed_modes, &p);
    Modes = p.Modes;

    /* Add established timings */
    Mode = DDCModesFromEstablished(scrnIndex, &DDC->timings1, quirks);
    Modes = xf86ModesAdd(Modes, Mode);

    /* Add standard timings */
    Mode = DDCModesFromStandardTiming(DDC->timings2, quirks, timing_level, rb);
    Modes = xf86ModesAdd(Modes, Mode);

    /* Add cea-extension mode timings */
    Mode = DDCModesFromCEAExtension(scrnIndex,DDC);
    Modes = xf86ModesAdd(Modes, Mode);

    if (quirks & DDC_QUIRK_PREFER_LARGE_60)
	xf86DDCSetPreferredRefresh(scrnIndex, Modes, 60);

    if (quirks & DDC_QUIRK_PREFER_LARGE_75)
	xf86DDCSetPreferredRefresh(scrnIndex, Modes, 75);

    Modes = xf86PruneDuplicateModes(Modes);

    return Modes;
}

struct det_mon_parameter {
    MonPtr Monitor;
    ddc_quirk_t quirks;
    Bool have_hsync;
    Bool have_vrefresh;
    Bool have_maxpixclock;
};

static void handle_detailed_monset(struct detailed_monitor_section *det_mon,
                                   void *data)
{
    int clock;
    struct det_mon_parameter *p = (struct det_mon_parameter *)data;
    int scrnIndex = ((xf86MonPtr)(p->Monitor->DDC))->scrnIndex;

    switch (det_mon->type) {
    case DS_RANGES:
        if (!p->have_hsync) {
            if (!p->Monitor->nHsync)
                xf86DrvMsg(scrnIndex, X_INFO,
                    "Using EDID range info for horizontal sync\n");
                p->Monitor->hsync[p->Monitor->nHsync].lo =
                    det_mon->section.ranges.min_h;
                p->Monitor->hsync[p->Monitor->nHsync].hi =
                    det_mon->section.ranges.max_h;
                p->Monitor->nHsync++;
        } else {
            xf86DrvMsg(scrnIndex, X_INFO,
                "Using hsync ranges from config file\n");
        }

        if (!p->have_vrefresh) {
            if (!p->Monitor->nVrefresh)
                xf86DrvMsg(scrnIndex, X_INFO,
                    "Using EDID range info for vertical refresh\n");
            p->Monitor->vrefresh[p->Monitor->nVrefresh].lo =
                det_mon->section.ranges.min_v;
            p->Monitor->vrefresh[p->Monitor->nVrefresh].hi =
                det_mon->section.ranges.max_v;
            p->Monitor->nVrefresh++;
        } else {
            xf86DrvMsg(scrnIndex, X_INFO,
                "Using vrefresh ranges from config file\n");
        }

        clock = det_mon->section.ranges.max_clock * 1000;
        if (p->quirks & DDC_QUIRK_DVI_SINGLE_LINK)
            clock = min(clock, 165000);
        if (!p->have_maxpixclock && clock > p->Monitor->maxPixClock)
            p->Monitor->maxPixClock = clock;

        break;
    default:
        break;
    }
}

/*
 * Fill out MonPtr with xf86MonPtr information.
 */
void
xf86EdidMonitorSet(int scrnIndex, MonPtr Monitor, xf86MonPtr DDC)
{
    DisplayModePtr Modes = NULL, Mode;
    struct det_mon_parameter p;

    if (!Monitor || !DDC)
        return;

    Monitor->DDC = DDC;

    if (Monitor->widthmm <= 0 || Monitor->heightmm <= 0) {
	Monitor->widthmm = 10 * DDC->features.hsize;
	Monitor->heightmm = 10 * DDC->features.vsize;
    }

    Monitor->reducedblanking = xf86MonitorSupportsReducedBlanking(DDC);

    Modes = xf86DDCGetModes(scrnIndex, DDC);

    /* Go through the detailed monitor sections */
    p.Monitor = Monitor;
    p.quirks = xf86DDCDetectQuirks(scrnIndex, Monitor->DDC, FALSE);
    p.have_hsync = (Monitor->nHsync != 0);
    p.have_vrefresh = (Monitor->nVrefresh != 0);
    p.have_maxpixclock = (Monitor->maxPixClock != 0);
    xf86ForEachDetailedBlock(DDC, handle_detailed_monset, &p);

    if (Modes) {
        /* Print Modes */
        xf86DrvMsg(scrnIndex, X_INFO, "Printing DDC gathered Modelines:\n");

        Mode = Modes;
        while (Mode) {
            xf86PrintModeline(scrnIndex, Mode);
            Mode = Mode->next;
        }

        /* Do we still need ranges to be filled in? */
        if (!Monitor->nHsync || !Monitor->nVrefresh)
            DDCGuessRangesFromModes(scrnIndex, Monitor, Modes);

        /* look for last Mode */
        Mode = Modes;

        while (Mode->next)
            Mode = Mode->next;

        /* add to MonPtr */
        if (Monitor->Modes) {
            Monitor->Last->next = Modes;
            Modes->prev = Monitor->Last;
            Monitor->Last = Mode;
        } else {
            Monitor->Modes = Modes;
            Monitor->Last = Mode;
        }
    }
}