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SubjectRe: GMA500 support
On Wed, Nov 23, 2011 at 11:28:47AM +0000, Alan Cox wrote:
> On Mon, 21 Nov 2011 19:29:10 +0100
> Kristoffer Ericson <kristoffer.ericson@gmail.com> wrote:
>
> > Greetings,
> >
> > Im syncing my gma500 tree to all the patches I see pass through the kernel mailinglist and
> > its progressing well.
> > However, It would be nice with an todo list or a more practical this-works list. I know
> > its not a priority but would simplify alot for end users.
>
> If you configure it in the following should work on GMA500/600
> - internal laptop displays including backlight
> - external svga
> - mode setting via KMS
> - framebuffer console
> - the framebuffer X server (and once out generally Dave Airlie's generic
> KMS X server)
> - suspend/resume
>
> The following I know don't work
> - Huge external displays so large they won't fit in 8MB at init time
> (causes a crash)
> - Using the vesa X server with it - this confuses stuff and isn't
> fixable, it's a "wrong user configuration"
>
> Unsupported
> - 2D hardware acceleration except console scrolling (as it seems to be
> too slow to be useful). I may add some 2D bits later where they do help
> (eg back to front blitting may be worth it just about)
> - 3D engine (no public documentation)

I understand that the chip is powerv SGX 535, any likelyhood of
getting those datasheets opened by the company?

> - Video playback acceleration. In theory there is enough info in the
> VAAPI code for GMA500/600 that has been published and in the old
> 'binary X/source kernel' driver to do this but someone will have to
> work on it if they want it
> - Dell Mini HDMI port. This seems to be some kind of external bridge
> chip. Being a TV luddite I don't yet own an HDMI capable display to
> test.
>
> And I'm sure we have a few bugs left !
>
> Alan


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