linux-kernel - Re: GMA500 support

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Message-ID: <20120328150225.GA16450@avionic-0098.mockup.avionic-design.de>
Date:	Wed, 28 Mar 2012 17:02:25 +0200
From:	Thierry Reding <thierry.reding@...onic-design.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Kristoffer Ericson <kristoffer.ericson@...il.com>,
	patrik.r.jakobsson@...il.com, linux-kernel@...r.kernel.org,
	greg@...ah.com
Subject: Re: GMA500 support

* Alan Cox wrote:
> > From a quick look this seems to be developed for Poulsbo, but since you
> > mention GMA600 explicitly, is it supposed to work on newer hardware as
> > well? I'm specifically interested in the Atom N2600 which has a GMA3600
> > (0x8086:0x0be1 to be exact).
> 
> I believe there are GMA600 and 3600 bits buried in the packages for
> Maemo/Meego/Tizen vaapi code but I've not looked.
> 
> > I'm also not sure which kernel driver this was developed against. It
> > looks like it might have been against the initial staging variant. At
> > least it still has some references to TTM, so I guess anyone wanting to
> > port it to the new kernel driver would have to convert those to GEM.
> 
> The one for the 3D/2D non-free user space driver. I've been working on
> Cedartrail primarily at the moment so not had time to dig further into
> the video playback logic. I did get the decoder detected and mapped
> happily but haven't yet had time to persuade the firmware to upload.
> 
> It'll also need the driver extending to support the overlay planes
> feature in the DRI/DRM layer.
> 
> > Do you think that would be doable? Can you say if the GMA3600 is
> > sufficiently similar to make that driver work
> 
> I don't know for sure.

Thanks, I'll dig some more.

Thierry

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