| 1 | /* |
| 2 | * Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com> |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file COPYING in the main directory of this archive |
| 6 | * for more details. |
| 7 | * |
| 8 | */ |
| 9 | #include <linux/fb.h> |
| 10 | #include <linux/pci.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/vgaarb.h> |
| 13 | |
| 14 | int fb_is_primary_device(struct fb_info *info) |
| 15 | { |
| 16 | struct device *device = info->device; |
| 17 | struct pci_dev *default_device = vga_default_device(); |
| 18 | struct pci_dev *pci_dev; |
| 19 | struct resource *res; |
| 20 | |
| 21 | if (!device || !dev_is_pci(device)) |
| 22 | return 0; |
| 23 | |
| 24 | pci_dev = to_pci_dev(device); |
| 25 | |
| 26 | if (default_device) { |
| 27 | if (pci_dev == default_device) |
| 28 | return 1; |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | res = pci_dev->resource + PCI_ROM_RESOURCE; |
| 33 | |
| 34 | if (res->flags & IORESOURCE_ROM_SHADOW) |
| 35 | return 1; |
| 36 | |
| 37 | return 0; |
| 38 | } |
| 39 | EXPORT_SYMBOL(fb_is_primary_device); |
| 40 | MODULE_LICENSE("GPL"); |