317b3c2167
Add function helper, fb_is_primary_device(). Given struct fb_info, it will return a nonzero value if the device is the primary display. Currently, only the i386 is supported where the function checks for the IORESOURCE_ROM_SHADOW flag. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
34 lines
741 B
C
34 lines
741 B
C
/*
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* arch/i386/video/fbdev.c - i386 Framebuffer
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*
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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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int fb_is_primary_device(struct fb_info *info)
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{
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struct device *device;
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struct pci_dev *pci_dev = NULL;
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struct resource *res = NULL;
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int retval = 0;
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device = info->device;
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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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res = &pci_dev->resource[PCI_ROM_RESOURCE];
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if (res && res->flags & IORESOURCE_ROM_SHADOW)
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retval = 1;
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return retval;
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}
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EXPORT_SYMBOL(fb_is_primary_device);
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