diff options
| author | Antonino A. Daplas <adaplas@gmail.com> | 2007-07-17 04:05:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:11 -0700 |
| commit | 317b3c2167f5326a7de30a1abe50c9897da7a0e3 (patch) | |
| tree | e0a8481121bb54bc2e714ea3b6c89b67a881a278 /arch/i386/video | |
| parent | 10eb2659cc6059d0c4de2e2c66d1534091519f56 (diff) | |
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 <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>
Diffstat (limited to 'arch/i386/video')
| -rw-r--r-- | arch/i386/video/Makefile | 1 | ||||
| -rw-r--r-- | arch/i386/video/fbdev.c | 34 |
2 files changed, 35 insertions, 0 deletions
diff --git a/arch/i386/video/Makefile b/arch/i386/video/Makefile new file mode 100644 index 000000000000..2c447c94adcc --- /dev/null +++ b/arch/i386/video/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_FB) += fbdev.o 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 <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> + +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); |