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fbdev: detect primary display device

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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>
This commit is contained in:
Antonino A. Daplas
2007-07-17 04:05:28 -07:00
committed by Linus Torvalds
parent 10eb2659cc
commit 317b3c2167
27 changed files with 177 additions and 1 deletions
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6
include/asm-m32r/fb.h
View File

@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>
@@ -10,4 +11,9 @@ static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
}
static inline int fb_is_primary_device(struct fb_info *info)
{
return 0;
}
#endif /* _ASM_FB_H_ */