1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/video/fbdev/nvidia/nv_of.c b/drivers/video/fbdev/nvidia/nv_of.c
new file mode 100644
index 000000000000..3bc13df4b120
--- /dev/null
+++ b/drivers/video/fbdev/nvidia/nv_of.c
@@ -0,0 +1,82 @@
+/*
+ * linux/drivers/video/nvidia/nv_of.c
+ *
+ * Copyright 2004 Antonino A. Daplas <adaplas @pol.net>
+ *
+ * Based on rivafb-i2c.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/gfp.h>
+#include <linux/pci.h>
+#include <linux/fb.h>
+
+#include <asm/io.h>
+
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+
+#include "nv_type.h"
+#include "nv_local.h"
+#include "nv_proto.h"
+
+#include "../edid.h"
+
+int nvidia_probe_of_connector(struct fb_info *info, int conn, u8 **out_edid)
+{
+	struct nvidia_par *par = info->par;
+	struct device_node *parent, *dp;
+	const unsigned char *pedid = NULL;
+	static char *propnames[] = {
+		"DFP,EDID", "LCD,EDID", "EDID", "EDID1",
+		"EDID,B", "EDID,A", NULL };
+	int i;
+
+	parent = pci_device_to_OF_node(par->pci_dev);
+	if (parent == NULL)
+		return -1;
+	if (par->twoHeads) {
+		const char *pname;
+		int len;
+
+		for (dp = NULL;
+		     (dp = of_get_next_child(parent, dp)) != NULL;) {
+			pname = of_get_property(dp, "name", NULL);
+			if (!pname)
+				continue;
+			len = strlen(pname);
+			if ((pname[len-1] == 'A' && conn == 1) ||
+			    (pname[len-1] == 'B' && conn == 2)) {
+				for (i = 0; propnames[i] != NULL; ++i) {
+					pedid = of_get_property(dp,
+							propnames[i], NULL);
+					if (pedid != NULL)
+						break;
+				}
+				of_node_put(dp);
+				break;
+			}
+		}
+	}
+	if (pedid == NULL) {
+		for (i = 0; propnames[i] != NULL; ++i) {
+			pedid = of_get_property(parent, propnames[i], NULL);
+			if (pedid != NULL)
+				break;
+		}
+	}
+	if (pedid) {
+		*out_edid = kmemdup(pedid, EDID_LENGTH, GFP_KERNEL);
+		if (*out_edid == NULL)
+			return -1;
+		printk(KERN_DEBUG "nvidiafb: Found OF EDID for head %d\n", conn);
+		return 0;
+	}
+	return -1;
+}