fbdev.c

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/*
 * Copyright (C) 2007 Antonino Daplas <[email protected]>
 *
 * 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/fb.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/vgaarb.h>

int fb_is_primary_device(struct fb_info *info)
{
    struct device *device = info->device;
    struct pci_dev *pci_dev = NULL;
    struct pci_dev *default_device = vga_default_device();
    struct resource *res = NULL;

    if (device)
        pci_dev = to_pci_dev(device);

    if (!pci_dev)
        return 0;

    if (default_device) {
        if (pci_dev == default_device)
            return 1;
        else
            return 0;
    }

    res = &pci_dev->resource[PCI_ROM_RESOURCE];

    if (res && res->flags & IORESOURCE_ROM_SHADOW)
        return 1;

    return 0;
}
EXPORT_SYMBOL(fb_is_primary_device);
MODULE_LICENSE("GPL");