From 60b59beafba875aef6d378078bce0baf2287ae14 Mon Sep 17 00:00:00 2001 From: Jaya Kumar Date: Tue, 8 May 2007 00:37:37 -0700 Subject: fbdev: mm: Deferred IO support This implements deferred IO support in fbdev. Deferred IO is a way to delay and repurpose IO. This implementation is done using mm's page_mkwrite and page_mkclean hooks in order to detect, delay and then rewrite IO. This functionality is used by hecubafb. [adaplas] This is useful for graphics hardware with no directly addressable/mappable framebuffer. Implementing this will allow the "framebuffer" to be accesible from user space via mmap(). Signed-off-by: Jaya Kumar Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/Kconfig | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/video/Kconfig') diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 8dfa88a..61c0a03 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -91,6 +91,11 @@ config FB_CFB_IMAGEBLIT blitting. This is used by drivers that don't provide their own (accelerated) version. +config FB_DEFERRED_IO + bool + depends on FB + default y + config FB_SVGALIB tristate depends on FB -- cgit v1.1