linux/arch/x86/video/fbdev.c
Matthew Garrett 88674088d1 x86: Use vga_default_device() when determining whether an fb is primary
IORESOURCE_ROM_SHADOW is not necessarily an indication that the hardware
is the primary device. Add support for using the vgaarb functions and
fall back if nothing's set them.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: mingo@redhat.com
Acked-by: hpa@zytor.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-04-24 09:50:17 +01:00

43 lines
895 B
C

/*
* Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com>
*
* 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");