[PATCH] gxfb: Fixups for the AMD Geode GX framebuffer driver

We cannot assume that the BIOS will be correctly setting up the hardware, so
set some bits in various display registers to enable video output.  Allow an
advanced user to specify a frambuffer size, rather then probing the BIOS.  All
of these fixes were prompted by the OLPC effort.

[akpm@osdl.org: cleanups]
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/video/geode/Kconfig b/drivers/video/geode/Kconfig
index 4e173ef..a814b6c 100644
--- a/drivers/video/geode/Kconfig
+++ b/drivers/video/geode/Kconfig
@@ -23,6 +23,26 @@ config FB_GEODE_GX
 
 	  If unsure, say N.
 
+config FB_GEODE_GX_SET_FBSIZE
+	bool "Manually specify the Geode GX framebuffer size"
+	depends on FB_GEODE_GX
+	default n
+	---help---
+	  If you want to manually specify the size of your GX framebuffer,
+	  say Y here, otherwise say N to dynamically probe it.
+
+	  Say N unless you know what you are doing.
+
+config FB_GEODE_GX_FBSIZE
+	hex "Size of the GX framebuffer, in bytes"
+	depends on FB_GEODE_GX_SET_FBSIZE
+	default "0x1600000"
+	---help---
+	  Specify the size of the GX framebuffer.  Normally, you will
+	  want this to be MB aligned.  Common values are 0x80000 (8MB)
+	  and 0x1600000 (16MB).  Don't change this unless you know what
+	  you are doing
+
 config FB_GEODE_GX1
 	tristate "AMD Geode GX1 framebuffer support (EXPERIMENTAL)"
 	depends on FB && FB_GEODE && EXPERIMENTAL