125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/*
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* Copyright 2006 Luc Verhaegen.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "xf86.h"
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#include "xf86DDC.h"
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#include <X11/Xatom.h>
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#include "property.h"
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#include "propertyst.h"
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#include <string.h>
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#define EDID1_ATOM_NAME "XFree86_DDC_EDID1_RAWDATA"
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#define EDID2_ATOM_NAME "XFree86_DDC_EDID2_RAWDATA"
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static void
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edidMakeAtom(int i, const char *name, CARD8 *data, int size)
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{
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Atom atom;
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unsigned char *atom_data;
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if (!(atom_data = malloc(size*sizeof(CARD8))))
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return;
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atom = MakeAtom(name, strlen(name), TRUE);
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memcpy(atom_data, data, size);
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xf86RegisterRootWindowProperty(i, atom, XA_INTEGER, 8, size, atom_data);
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}
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static void
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addRootWindowProperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
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{
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int i, scrnIndex = pScrn->scrnIndex;
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Bool makeEDID1prop = FALSE;
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Bool makeEDID2prop = FALSE;
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if (DDC->flags & MONITOR_DISPLAYID) {
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/* Don't bother, use RANDR already */
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return;
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} else if (DDC->ver.version == 1) {
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makeEDID1prop = TRUE;
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} else if (DDC->ver.version == 2) {
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int checksum1;
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int checksum2;
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makeEDID2prop = TRUE;
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/* Some monitors (eg Panasonic PanaSync4)
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* report version==2 because they used EDID v2 spec document,
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* although they use EDID v1 data structure :-(
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*
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* Try using checksum to determine when we have such a monitor.
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*/
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checksum2 = 0;
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for (i = 0; i < 256; i++)
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checksum2 += DDC->rawData[i];
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if (checksum2 % 256) {
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xf86DrvMsg(scrnIndex, X_INFO, "Monitor EDID v2 checksum failed\n");
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xf86DrvMsg(scrnIndex, X_INFO,
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"XFree86_DDC_EDID2_RAWDATA property may be bad\n");
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checksum1 = 0;
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for (i = 0; i < 128; i++)
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checksum1 += DDC->rawData[i];
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if (!(checksum1 % 256)) {
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xf86DrvMsg(scrnIndex, X_INFO,
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"Monitor EDID v1 checksum passed,\n");
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xf86DrvMsg(scrnIndex, X_INFO,
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"XFree86_DDC_EDID1_RAWDATA property created\n");
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makeEDID1prop = TRUE;
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}
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}
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} else {
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xf86DrvMsg(scrnIndex, X_PROBED, "unexpected EDID version %d.%d\n",
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DDC->ver.version, DDC->ver.revision);
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return;
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}
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if (makeEDID1prop) {
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int size = 128 +
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(DDC->flags & EDID_COMPLETE_RAWDATA ? DDC->no_sections * 128 : 0);
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edidMakeAtom(scrnIndex, EDID1_ATOM_NAME, DDC->rawData, size);
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}
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if (makeEDID2prop)
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edidMakeAtom(scrnIndex, EDID2_ATOM_NAME, DDC->rawData, 256);
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}
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Bool
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xf86SetDDCproperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
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{
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if (!pScrn || !pScrn->monitor || !DDC)
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return FALSE;
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if (DDC->flags & MONITOR_DISPLAYID)
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;
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else
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xf86EdidMonitorSet(pScrn->scrnIndex, pScrn->monitor, DDC);
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addRootWindowProperties(pScrn, DDC);
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return TRUE;
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}
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