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