[coreboot] about Ivy Bridge CPU with QM67 PCH

Peter Stuge peter at stuge.se
Sun Oct 18 18:44:09 CEST 2015


Iru Cai wrote:
> I've been testing the Lenovo T420 port recently, and now I can
> install an Ivy Bridge processor and run fine on Linux(except some
> thermal issues).

That's pretty nice I think.

> However, the native graphics initialization doesn't work properly
> I don't know if someone has tried using mixed generation of CPU and
> chipset combination with coreboot before,

Probably not.

> I have pushed the patch that makes coreboot support both SNB and
> IVB processor for review:
> http://review.coreboot.org/#/c/12087/

Thanks! There is a source code style issue - you used two spaces
instead of one tab to indent - please fix that, but other than that
the patch looks fine to me.

But the two files gma_{sandy,ivy}bridge_lvds.c are a bit of a mess -
they need to be cleaned up and can quite easily be unified into a
single file, without having it become the mess that the i915 kernel
code is. The key is to have a good data model, and the data model
seems clear to me from the existing code.

For fun (or pain), take a look at: git diff 758a41 7137c5


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