README


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AMD Geode GX and LX graphics driver for X.Org
=============================================
Last updated:  2008-08-13

= Introduction =

This is the X graphics driver for the AMD Geode GX and LX processors.
The GX driver features XAA and EXA support for graphics acceleration,
and the LX driver supports EXA (including compositing).  Both drivers
support dynamic rotation with XRandR, and Xv overlay support.

http://wiki.x.org/wiki/AMDGeodeDriver

= Roadmap =

Support for X servers older than 1.4 is expected to be dropped in the
near future.  If your distribution still hasn't upgraded, please urge 
them to get around it soon.

Support for old GX1 Geodes by Cyrix and NSC will be reintroduced soon,
at which point xf86-video-cyrix and xf86-video-nsc will be retired.

= Dependencies =

As of version 2.9.0, this driver depends on X.Org server 1.3 or newer,
because it utilizes the new common DDC probing libraries from X.Org.

If necessary, it might be possible to create autoconf macros to make 
this driver compile against older X servers, following this example:

http://lists.freedesktop.org/archives/xorg-commit/2007-February/010341.html

Patches accomplishing the same trick for the Geode driver are welcome.

= Configuration options =

You can specify the Geode driver in the normal fashion:

Section "Device"
	Identifier "AMD Geode"
	Driver "geode"
	Option "blah" "blah"
	...
EndSection

The following options may be added to the section:

== GX ==

SWCursor: Enable software cursors (essentially disabling HW cursor support)
NoCompression: Disable video bandwidth compression
NoAccel: Disable hardware assisted acceleration
AccelMethod: "EXA" (default) or "XAA"
Rotate: Select a orientation to start with - LEFT, INVERT, CCW
NoPanel: Disable panel support
OSMImageBuffers: Set the number of image buffers (XAA only)
OSMColorExpBuffers: Set the number of color expansion buffers (XAA only)
FBSize: Specify the size of the video space (in bytes)
PanelGeometry: Specify the geometry of the attached panel ("<width>x<height>")

== LX ==

SWCursor: Enable software cursors (essentially disabling HW cursor support)
NoCompression: Disable video bandwidth compression
NoAccel: Disable hardware assisted acceleration
Rotate: Select a orientation to start with - LEFT, INVERT, CCW
NoPanel: Disable panel support
ExaScratch: Specify the amount of extra EXA scratch buffer (in bytes)
FBSize: Specify the size of the video space (in bytes)
PanelGeometry: Specify the geometry of the attached panel ("<width>x<height>")

= EOF =