Hi Nathael,

your driver seems to be the most complete framebufferdriver for this chip
I heard about :-)

Our driver is currently based on some register dumps by SMI. The chip is completely
setup by U-Boot. Because of it's missing generic'ness I did not dare to post it
as a patch to the U-Boot list :-) Finally we are using a stupid framebuffer driver
that does absolutely no 722 setup. It just represents the framebuffer driver interface.

I will give your driver a try.

On Wednesday 10 September 2008 13:56, Nathael Pajani wrote:

Hi !
I know your mail is quite old, but this might still prove useful....
and did you find a solution ?
Do you finally have a driver ? I'm interested in whatever information you have, 
even the links to 2.4 kernel code, or code for SM712 chips. Anything at all in 
fact, so I may try to improve my driver.

I have this device (Silicon Motion SM722 Lynx3DM+) on a powerPC board from ACTIS 
Computers.

You'll find attached a patch with the SMI driver I made.
It's not as good as it should be, be I have a usable display, being able to use 
xorg, and it's as much as I managed without a vgabios (which they provide for 
x86 arch only).
Note also that uboot on the board does some chip init, so this driver alone may 
not be useful if you don't already have something.

I assume that you enable access to the memory mapped register in U-Boot, right?

Note also that for my brain's sake I removed parts handling LynxEM chips from 
the original code (which was mainly for mips VR5701-SG2 with LynxEM+).

Have fun, and thank you if you can send in some useful stuff.
++++

Matthias