xf86edidmodes.c

显驱动 Intel英特尔G45G43G41G35G33G31G965Q963Q965GM965系列显卡最新X.Org驱动2.4.0版For Linux

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

    if (timing->interlaced)
        Mode->Flags |= V_INTERLACE;

    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;

    return Mode;
}

/*
 *
 */
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;
    }
}

_X_EXPORT DisplayModePtr
xf86DDCGetModes(int scrnIndex, xf86MonPtr DDC)
{
    int preferred, i;
    DisplayModePtr  Modes = NULL, Mode;
    ddc_quirk_t	    quirks;

    xf86DrvMsg (scrnIndex, X_INFO, "EDID vendor \"%s\", prod id %d\n",
		DDC->vendor.name, DDC->vendor.prod_id);
    quirks = DDC_QUIRK_NONE;
    for (i = 0; ddc_quirks[i].detect; i++)
	if (ddc_quirks[i].detect (scrnIndex, DDC))
	{
	    xf86DrvMsg (scrnIndex, X_INFO, "    EDID quirk: %s\n",
			ddc_quirks[i].description);
	    quirks |= ddc_quirks[i].quirk;
	}
    
    preferred = PREFERRED_TIMING_MODE(DDC->features.msc);
    if (quirks & DDC_QUIRK_PREFER_LARGE_60)
	preferred = 0;

    for (i = 0; i < DET_TIMINGS; i++) {
	struct detailed_monitor_section *det_mon = &DDC->det_mon[i];

        switch (det_mon->type) {
        case DT:
            Mode = DDCModeFromDetailedTiming(scrnIndex,
                                             &det_mon->section.d_timings,
					     preferred,
					     quirks);
	    preferred = 0;
            Modes = xf86ModesAdd(Modes, Mode);
            break;
        case DS_STD_TIMINGS:
            Mode = DDCModesFromStandardTiming(scrnIndex,
					      det_mon->section.std_t,
					      quirks);
            Modes = xf86ModesAdd(Modes, Mode);
            break;
        default:
            break;
        }
    }

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

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

    if (quirks & DDC_QUIRK_PREFER_LARGE_60)
    {
	DisplayModePtr	best = Modes;
	for (Mode = Modes; Mode; Mode = Mode->next)
	{
	    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 - 60.0);
		double	best_dist = fabs(best_refresh - 60.0);
		if (mode_dist < best_dist)
		{
		    best = Mode;
		    continue;
		}
	    }
	}
	if (best)
	    best->type |= M_T_PREFERRED;
    }
    return Modes;
}

/*
 * Fill out MonPtr with xf86MonPtr information.
 */
_X_EXPORT void
xf86DDCMonitorSet(int scrnIndex, MonPtr Monitor, xf86MonPtr DDC)
{
    DisplayModePtr Modes = NULL, Mode;
    int i, clock;
    Bool have_hsync = FALSE, have_vrefresh = FALSE, have_maxpixclock = FALSE;

    if (!Monitor || !DDC)
        return;

    Monitor->DDC = DDC;

    Monitor->widthmm = 10 * DDC->features.hsize;
    Monitor->heightmm = 10 * DDC->features.vsize;

    /* If this is a digital display, then we can use reduced blanking */
    if (DDC->features.input_type)
        Monitor->reducedblanking = TRUE;
    /* Allow the user to also enable this through config */

    Modes = xf86DDCGetModes(scrnIndex, DDC);

    /* Skip EDID ranges if they were specified in the config file */
    have_hsync = (Monitor->nHsync != 0);
    have_vrefresh = (Monitor->nVrefresh != 0);
    have_maxpixclock = (Monitor->maxPixClock != 0);

    /* Go through the detailed monitor sections */
    for (i = 0; i < DET_TIMINGS; i++) {
        switch (DDC->det_mon[i].type) {
        case DS_RANGES:
	    if (!have_hsync) {
		if (!Monitor->nHsync)
		    xf86DrvMsg(scrnIndex, X_INFO,
			    "Using EDID range info for horizontal sync\n");
		Monitor->hsync[Monitor->nHsync].lo =
		    DDC->det_mon[i].section.ranges.min_h;
		Monitor->hsync[Monitor->nHsync].hi =
		    DDC->det_mon[i].section.ranges.max_h;
		Monitor->nHsync++;
	    } else {
		xf86DrvMsg(scrnIndex, X_INFO,
			"Using hsync ranges from config file\n");
	    }

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

	    clock = DDC->det_mon[i].section.ranges.max_clock * 1000;
	    if (!have_maxpixclock && clock > Monitor->maxPixClock)
		Monitor->maxPixClock = clock;

            break;
        default:
            break;
        }
    }

    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;
        }
    }
}