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88674088d1
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>
43 lines
895 B
C
43 lines
895 B
C
/*
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* Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com>
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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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*/
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#include <linux/fb.h>
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/vgaarb.h>
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int fb_is_primary_device(struct fb_info *info)
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{
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struct device *device = info->device;
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struct pci_dev *pci_dev = NULL;
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struct pci_dev *default_device = vga_default_device();
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struct resource *res = NULL;
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if (device)
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pci_dev = to_pci_dev(device);
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if (!pci_dev)
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return 0;
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if (default_device) {
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if (pci_dev == default_device)
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return 1;
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else
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return 0;
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}
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res = &pci_dev->resource[PCI_ROM_RESOURCE];
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if (res && res->flags & IORESOURCE_ROM_SHADOW)
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return 1;
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return 0;
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}
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EXPORT_SYMBOL(fb_is_primary_device);
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MODULE_LICENSE("GPL");
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