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78 lines
1.7 KiB
78 lines
1.7 KiB
/* |
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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/gfp.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 "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_each_child_of_node(parent, dp) { |
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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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