xserver-multidpi/hw/xfree86/ddc/ddcProperty.c

/*
 * Copyright 2006 Luc Verhaegen.
 *
 * 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.
 */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include "xf86.h"
#include "xf86DDC.h"
#include <X11/Xatom.h>
#include "property.h"
#include "propertyst.h"
#include <string.h>

#define EDID1_ATOM_NAME         "XFree86_DDC_EDID1_RAWDATA"

static void
edidMakeAtom(int i, const char *name, CARD8 *data, int size)
{
    Atom atom;
    unsigned char *atom_data;

    if (!(atom_data = malloc(size * sizeof(CARD8))))
        return;

    atom = MakeAtom(name, strlen(name), TRUE);
    memcpy(atom_data, data, size);
    xf86RegisterRootWindowProperty(i, atom, XA_INTEGER, 8, size, atom_data);
}

static void
addRootWindowProperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
{
    int scrnIndex = pScrn->scrnIndex;

    if (DDC->flags & MONITOR_DISPLAYID) {
        /* Don't bother, use RANDR already */
        return;
    }
    else if (DDC->ver.version == 1) {
        int size = 128 +
            (DDC->flags & EDID_COMPLETE_RAWDATA ? DDC->no_sections * 128 : 0);

        edidMakeAtom(scrnIndex, EDID1_ATOM_NAME, DDC->rawData, size);
    }
    else {
        xf86DrvMsg(scrnIndex, X_PROBED, "unexpected EDID version %d.%d\n",
                   DDC->ver.version, DDC->ver.revision);
        return;
    }
}

Bool
xf86SetDDCproperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
{
    if (!pScrn || !pScrn->monitor || !DDC)
        return FALSE;

    if (DDC->flags & MONITOR_DISPLAYID);
    else
        xf86EdidMonitorSet(pScrn->scrnIndex, pScrn->monitor, DDC);

    addRootWindowProperties(pScrn, DDC);

    return TRUE;
}