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/* ddcProperty.c: Make the DDC monitor information available to clients
* as properties on the root window
*
* Copyright 1999 by Andrew C Aitchison <A.C.Aitchison@dpmms.cam.ac.uk>
*/
/* $XFree86$ */
#include "misc.h"
#include "xf86.h"
/* #include "xf86_ansic.h" */
/* #include "xf86_OSproc.h" */
#include "Xatom.h"
#include "property.h"
#include "propertyst.h"
#include "xf86DDC.h"
#define EDID1_ATOM_NAME "XFree86_DDC_EDID1_RAWDATA"
#define EDID2_ATOM_NAME "XFree86_DDC_EDID2_RAWDATA"
#define VDIF_ATOM_NAME "XFree86_DDC_VDIF_RAWDATA"
Bool
xf86SetDDCproperties(ScrnInfoPtr pScrnInfo, xf86MonPtr DDC)
{
Atom EDID1Atom=-1, EDID2Atom=-1, VDIFAtom=-1;
CARD8 *EDID1rawdata = NULL;
CARD8 *EDID2rawdata = NULL;
int i, ret;
Bool makeEDID1prop = FALSE;
Bool makeEDID2prop = FALSE;
#ifdef DEBUG
ErrorF("xf86SetDDCproperties(%p, %p)\n", pScrnInfo, DDC);
#endif
if (pScrnInfo==NULL || pScrnInfo->monitor==NULL || DDC==NULL) {
return FALSE;
}
#ifdef DEBUG
ErrorF("pScrnInfo->scrnIndex %d\n", pScrnInfo->scrnIndex);
ErrorF("pScrnInfo->monitor was %p\n", pScrnInfo->monitor);
#endif
pScrnInfo->monitor->DDC = DDC;
if (DDC->ver.version == 1) {
makeEDID1prop = TRUE;
} else if (DDC->ver.version == 2) {
int checksum1;
int checksum2;
makeEDID2prop = TRUE;
/* Some monitors (eg Panasonic PanaSync4)
* report version==2 because they used EDID v2 spec document,
* although they use EDID v1 data structure :-(
*
* Try using checksum to determine when we have such a monitor.
*/
checksum2 = 0;
for (i=0; i<256; i++) { checksum2 += DDC->rawData[i]; }
if ( (checksum2 % 256) != 0 ) {
xf86DrvMsg(pScrnInfo->scrnIndex,X_INFO, "Monitor EDID v2 checksum failed\n");
xf86DrvMsg(pScrnInfo->scrnIndex,X_INFO, "XFree86_DDC_EDID2_RAWDATA property may be bad\n");
checksum1 = 0;
for (i=0; i<128; i++) { checksum1 += DDC->rawData[i]; }
if ( (checksum1 % 256) == 0 ) {
xf86DrvMsg(pScrnInfo->scrnIndex,X_INFO, "Monitor EDID v1 checksum passed,\n");
xf86DrvMsg(pScrnInfo->scrnIndex,X_INFO, "XFree86_DDC_EDID1_RAWDATA property created\n");
makeEDID1prop = TRUE;
}
}
} else {
xf86DrvMsg(pScrnInfo->scrnIndex, X_PROBED,
"unexpected EDID version %d revision %d\n",
DDC->ver.version, DDC->ver.revision );
}
if (makeEDID1prop) {
if ( (EDID1rawdata = xalloc(128*sizeof(CARD8)))==NULL ) {
return FALSE;
}
EDID1Atom = MakeAtom(EDID1_ATOM_NAME, sizeof(EDID1_ATOM_NAME), TRUE);
for (i=0; i<128; i++) {
EDID1rawdata[i] = DDC->rawData[i];
}
#ifdef DEBUG
ErrorF("xf86RegisterRootWindowProperty %p(%d,%d,%d,%d,%d,%p)\n",
xf86RegisterRootWindowProperty,
pScrnInfo->scrnIndex,
EDID1Atom, XA_INTEGER, 8,
128, (unsigned char *)EDID1rawdata );
#endif
ret = xf86RegisterRootWindowProperty(pScrnInfo->scrnIndex,
EDID1Atom, XA_INTEGER, 8,
128, (unsigned char *)EDID1rawdata
);
if (ret != Success)
ErrorF("xf86RegisterRootWindowProperty returns %d\n", ret );
}
if (makeEDID2prop) {
if ( (EDID2rawdata = xalloc(256*sizeof(CARD8)))==NULL ) {
return FALSE;
}
for (i=0; i<256; i++) {
EDID2rawdata[i] = DDC->rawData[i];
}
EDID2Atom = MakeAtom(EDID2_ATOM_NAME, sizeof(EDID2_ATOM_NAME), TRUE);
#ifdef DEBUG
ErrorF("xf86RegisterRootWindowProperty %p(%d,%d,%d,%d,%d,%p)\n",
xf86RegisterRootWindowProperty,
pScrnInfo->scrnIndex,
EDID2Atom, XA_INTEGER, 8,
256, (unsigned char *)EDID2rawdata );
#endif
ret = xf86RegisterRootWindowProperty(pScrnInfo->scrnIndex,
EDID2Atom, XA_INTEGER, 8,
256, (unsigned char *)EDID2rawdata
);
if (ret != Success)
ErrorF("xf86RegisterRootWindowProperty returns %d\n", ret );
}
if (DDC->vdif) {
#define VDIF_DUMMY_STRING "setting dummy VDIF property - please insert correct values\n"
#ifdef DEBUG
ErrorF("xf86RegisterRootWindowProperty %p(%d,%d,%d,%d,%d,%p)\n",
xf86RegisterRootWindowProperty,
pScrnInfo->scrnIndex,
VDIFAtom, XA_STRING, 8,
strlen(VDIF_DUMMY_STRING), VDIF_DUMMY_STRING
);
#endif
VDIFAtom = MakeAtom(VDIF_ATOM_NAME, sizeof(VDIF_ATOM_NAME), TRUE);
ret = xf86RegisterRootWindowProperty(pScrnInfo->scrnIndex,
VDIFAtom, XA_STRING, 8,
strlen(VDIF_DUMMY_STRING),
VDIF_DUMMY_STRING
);
if (ret != Success)
ErrorF("xf86RegisterRootWindowProperty returns %d\n", ret );
}
return TRUE;
}
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