1 files changed, 125 insertions, 0 deletions
diff --git a/hw/xfree86/ddc/ddcProperty.c b/hw/xfree86/ddc/ddcProperty.c
new file mode 100644
index 0000000..d2d90ba
--- /dev/null
+++ b/hw/xfree86/ddc/ddcProperty.c
@@ -0,0 +1,125 @@
+/*
+ * 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 "xf86DDC.h"
+#include <string.h>
+
+#define EDID1_ATOM_NAME         "XFree86_DDC_EDID1_RAWDATA"
+#define EDID2_ATOM_NAME         "XFree86_DDC_EDID2_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 i, scrnIndex = pScrn->scrnIndex;
+    Bool makeEDID1prop = FALSE;
+    Bool makeEDID2prop = FALSE;
+
+    if (DDC->flags & MONITOR_DISPLAYID) {
+	/* Don't bother, use RANDR already */
+	return;
+    } else 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) {
+	int size = 128 +
+	    (DDC->flags & EDID_COMPLETE_RAWDATA ? DDC->no_sections * 128 : 0);
+
+	edidMakeAtom(scrnIndex, EDID1_ATOM_NAME, DDC->rawData, size);
+    } 
+
+    if (makeEDID2prop)
+	edidMakeAtom(scrnIndex, EDID2_ATOM_NAME, DDC->rawData, 256);
+}
+
+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;
+}