Publish the raw EDID block as a property on the root window.

This was removed in the patch for bug #5386, but is still useful.

1 files changed, 88 insertions, 3 deletions

diff --git a/hw/xfree86/ddc/ddcProperty.c b/hw/xfree86/ddc/ddcProperty.c
index c76afbc02..59873fafd 100644
--- a/hw/xfree86/ddc/ddcProperty.c
+++ b/hw/xfree86/ddc/ddcProperty.c
@@ -27,6 +27,10 @@
 
 #include "xf86.h"
 #include "xf86DDC.h"
+#include <X11/Xatom.h>
+#include "property.h"
+#include "propertyst.h"
+#include "xf86DDC.h"
 
 /*
  * xf86Mode.c should have a some more DisplayModePtr list handling.
@@ -407,9 +411,88 @@ xf86DDCMonitorSet(int scrnIndex, MonPtr Monitor, xf86MonPtr DDC)
     }
 }
 
-/*
- * Empty shell that keeps most drivers happy.
- */
+#define EDID1_ATOM_NAME         "XFree86_DDC_EDID1_RAWDATA"
+#define EDID2_ATOM_NAME         "XFree86_DDC_EDID2_RAWDATA"
+#define VDIF_ATOM_NAME          "XFree86_DDC_VDIF_RAWDATA"
+
+static void
+addRootWindowProperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
+{
+    Atom EDID1Atom=-1, EDID2Atom=-1;
+    CARD8 *EDID1rawdata = NULL;
+    CARD8 *EDID2rawdata = NULL;
+    int i, scrnIndex = pScrn->scrnIndex;
+    Bool makeEDID1prop = FALSE;
+    Bool makeEDID2prop = FALSE;
+
+    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) {
+	    xf86DrvMsg(scrnIndex, X_INFO, "Monitor EDID v2 checksum failed\n");
+	    xf86DrvMsg(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)) {
+		xf86DrvMsg(scrnIndex, X_INFO,
+			"Monitor EDID v1 checksum passed,\n");
+		xf86DrvMsg(scrnIndex, X_INFO,
+			"XFree86_DDC_EDID1_RAWDATA property created\n");
+		makeEDID1prop = TRUE;
+	    }
+	}
+    } else {
+	xf86DrvMsg(scrnIndex, X_PROBED, "unexpected EDID version %d.%d\n",
+		DDC->ver.version, DDC->ver.revision);
+	return;
+    }
+
+    if (makeEDID1prop) {
+	if ((EDID1rawdata = xalloc(128*sizeof(CARD8)))==NULL)
+	    return;
+
+	EDID1Atom = MakeAtom(EDID1_ATOM_NAME, sizeof(EDID1_ATOM_NAME), TRUE);
+	memcpy(EDID1rawdata, DDC->rawData, 128);
+	xf86RegisterRootWindowProperty(scrnIndex, EDID1Atom, XA_INTEGER, 8,
+		128, (unsigned char *)EDID1rawdata);
+    } 
+
+    if (makeEDID2prop) {
+	if ((EDID2rawdata = xalloc(256*sizeof(CARD8)))==NULL)
+	    return;
+
+	memcpy(EDID2rawdata, DDC->rawData, 256);
+	EDID2Atom = MakeAtom(EDID2_ATOM_NAME, sizeof(EDID2_ATOM_NAME), TRUE);
+	xf86RegisterRootWindowProperty(scrnIndex, EDID2Atom, XA_INTEGER, 8,
+		256, (unsigned char *)EDID2rawdata);
+    }
+
+#if 0
+    if (DDC->vdif) {
+#define VDIF_DUMMY_STRING "setting dummy VDIF property - please insert correct values\n"
+
+	VDIFAtom = MakeAtom(VDIF_ATOM_NAME, sizeof(VDIF_ATOM_NAME), TRUE);
+	xf86RegisterRootWindowProperty(scrnIndex, VDIFAtom, XA_STRING, 8,
+		strlen(VDIF_DUMMY_STRING), VDIF_DUMMY_STRING);
+    }
+#endif
+}
+
 Bool
 xf86SetDDCproperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
 {
@@ -418,5 +501,7 @@ xf86SetDDCproperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
 
     xf86DDCMonitorSet(pScrn->scrnIndex, pScrn->monitor, DDC);
 
+    addRootWindowProperties(pScrn, DDC);
+
     return TRUE;
 }