cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

nv_of.c (1783B)

      1/*
      2 * linux/drivers/video/nvidia/nv_of.c
      3 *
      4 * Copyright 2004 Antonino A. Daplas <adaplas @pol.net>
      5 *
      6 * Based on rivafb-i2c.c
      7 *
      8 * This file is subject to the terms and conditions of the GNU General Public
      9 * License.  See the file COPYING in the main directory of this archive
     10 * for more details.
     11 */
     12
     13#include <linux/module.h>
     14#include <linux/kernel.h>
     15#include <linux/delay.h>
     16#include <linux/gfp.h>
     17#include <linux/pci.h>
     18#include <linux/fb.h>
     19
     20#include <asm/io.h>
     21
     22#include "nv_type.h"
     23#include "nv_local.h"
     24#include "nv_proto.h"
     25
     26#include "../edid.h"
     27
     28int nvidia_probe_of_connector(struct fb_info *info, int conn, u8 **out_edid)
     29{
     30	struct nvidia_par *par = info->par;
     31	struct device_node *parent, *dp;
     32	const unsigned char *pedid = NULL;
     33	static char *propnames[] = {
     34		"DFP,EDID", "LCD,EDID", "EDID", "EDID1",
     35		"EDID,B", "EDID,A", NULL };
     36	int i;
     37
     38	parent = pci_device_to_OF_node(par->pci_dev);
     39	if (parent == NULL)
     40		return -1;
     41	if (par->twoHeads) {
     42		const char *pname;
     43		int len;
     44
     45		for_each_child_of_node(parent, dp) {
     46			pname = of_get_property(dp, "name", NULL);
     47			if (!pname)
     48				continue;
     49			len = strlen(pname);
     50			if ((pname[len-1] == 'A' && conn == 1) ||
     51			    (pname[len-1] == 'B' && conn == 2)) {
     52				for (i = 0; propnames[i] != NULL; ++i) {
     53					pedid = of_get_property(dp,
     54							propnames[i], NULL);
     55					if (pedid != NULL)
     56						break;
     57				}
     58				of_node_put(dp);
     59				break;
     60			}
     61		}
     62	}
     63	if (pedid == NULL) {
     64		for (i = 0; propnames[i] != NULL; ++i) {
     65			pedid = of_get_property(parent, propnames[i], NULL);
     66			if (pedid != NULL)
     67				break;
     68		}
     69	}
     70	if (pedid) {
     71		*out_edid = kmemdup(pedid, EDID_LENGTH, GFP_KERNEL);
     72		if (*out_edid == NULL)
     73			return -1;
     74		printk(KERN_DEBUG "nvidiafb: Found OF EDID for head %d\n", conn);
     75		return 0;
     76	}
     77	return -1;
     78}