drivers/video/nvidia/nv_of.c

   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/config.h>
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/sched.h>
  17 #include <linux/delay.h>
  18 #include <linux/pci.h>
  19 #include <linux/fb.h>
  20
  21 #include <asm/io.h>
  22
  23 #include <asm/prom.h>
  24 #include <asm/pci-bridge.h>
  25
  26 #include "nv_type.h"
  27 #include "nv_local.h"
  28 #include "nv_proto.h"
  29
  30 void nvidia_create_i2c_busses(struct nvidia_par *par) {}
  31 void nvidia_delete_i2c_busses(struct nvidia_par *par) {}
  32
  33 int nvidia_probe_i2c_connector(struct nvidia_par *par, int conn, u8 **out_edid)
  34 {
  35         struct device_node *dp;
  36         unsigned char *pedid = NULL;
  37         unsigned char *disptype = NULL;
  38         static char *propnames[] = {
  39                 "DFP,EDID", "LCD,EDID", "EDID", "EDID1", "EDID,B", "EDID,A", NULL };
  40         int i;
  41
  42         dp = pci_device_to_OF_node(par->pci_dev);
  43         for (; dp != NULL; dp = dp->child) {
  44                 disptype = (unsigned char *)get_property(dp, "display-type", NULL);
  45                 if (disptype == NULL)
  46                         continue;
  47                 if (strncmp(disptype, "LCD", 3) != 0)
  48                         continue;
  49                 for (i = 0; propnames[i] != NULL; ++i) {
  50                         pedid = (unsigned char *)
  51                                 get_property(dp, propnames[i], NULL);
  52                         if (pedid != NULL) {
  53                                 *out_edid = pedid;
  54                                 return 0;
  55                         }
  56                 }
  57         }
  58         return 1;
  59 }