/* * 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 "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_each_child_of_node(parent, dp) {			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;}