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