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[PATCH] Return the line length via sysfs for fbdev

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This small patch returns the stride/line length of the framebuffer via
sysfs.

Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
James Simmons 2005-10-24 21:46:21 +01:00 committed by Linus Torvalds
parent d5c5d8fe32
commit c14e2cfc18
1 changed files with 8 additions and 0 deletions
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8
drivers/video/fbsysfs.c
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@ -242,6 +242,13 @@ static ssize_t show_virtual(struct class_device *class_device, char *buf)
fb_info->var.yres_virtual); fb_info->var.yres_virtual);
} }
static ssize_t show_stride(struct class_device *class_device, char *buf)
{
struct fb_info *fb_info =
(struct fb_info *)class_get_devdata(class_device);
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
}
/* Format for cmap is "%02x%c%4x%4x%4x\n" */ /* Format for cmap is "%02x%c%4x%4x%4x\n" */
/* %02x entry %c transp %4x red %4x blue %4x green \n */ /* %02x entry %c transp %4x red %4x blue %4x green \n */
/* 256 rows at 16 chars equals 4096, the normal page size */ /* 256 rows at 16 chars equals 4096, the normal page size */
@ -432,6 +439,7 @@ static struct class_device_attribute class_device_attrs[] = {
__ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan), __ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
__ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual), __ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
__ATTR(name, S_IRUGO, show_name, NULL), __ATTR(name, S_IRUGO, show_name, NULL),
__ATTR(stride, S_IRUGO, show_stride, NULL),
}; };
int fb_init_class_device(struct fb_info *fb_info) int fb_init_class_device(struct fb_info *fb_info)