From 317b3c2167f5326a7de30a1abe50c9897da7a0e3 Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Tue, 17 Jul 2007 04:05:28 -0700 Subject: fbdev: detect primary display device 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 Cc: David Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/video/fbdev.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 arch/i386/video/fbdev.c (limited to 'arch/i386/video/fbdev.c') diff --git a/arch/i386/video/fbdev.c b/arch/i386/video/fbdev.c new file mode 100644 index 000000000000..7fc712c46a64 --- /dev/null +++ b/arch/i386/video/fbdev.c @@ -0,0 +1,34 @@ +/* + * arch/i386/video/fbdev.c - i386 Framebuffer + * + * Copyright (C) 2007 Antonino Daplas + * + * 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 +#include + +int fb_is_primary_device(struct fb_info *info) +{ + struct device *device; + struct pci_dev *pci_dev = NULL; + struct resource *res = NULL; + int retval = 0; + + device = info->device; + + if (device) + pci_dev = to_pci_dev(device); + + if (pci_dev) + res = &pci_dev->resource[PCI_ROM_RESOURCE]; + + if (res && res->flags & IORESOURCE_ROM_SHADOW) + retval = 1; + + return retval; +} +EXPORT_SYMBOL(fb_is_primary_device); -- cgit v1.2.2