/* * 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; }