R128 Scaling.

Michel Dänzer michel at daenzer.net
Tue Apr 16 23:12:12 EST 2002

On Tue, 2002-04-16 at 14:32, Adrian Cox wrote:
> On 16 Apr 2002 13:49:12 +0200
> Stefan Berndtsson <stefan at nocrew.org> wrote:
> > What is the status of the scaling registers for rage128? I saw a patch
> > in the archive, that adds scaling capabilities for the framebuffer,
> > and that seems to work reasonably well.
> I started looking at that a while ago, but didn't get very far. To get
> much further (and also to tackle the VGA out problems) I probably need
> the chip docs, but I haven't really pursued them. My one email asking to
> become an X developer was ignored, and I don't know of any other way to
> get the docs currently.

You can apply for them with ATI directly, their developer relations
program to be exact.

> The scaling patches I worked on had a problem with display flickering.

I could resolve that problem with custom modes I obtained in a way Kevin
Hendricks posted here.

> They also needed a general mechanism to get the physical panel size.

Shouldn't be hard with Apple machines, and on x86 one can use the BIOS
as seen in the X driver.

Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member   /  CS student, Free Software enthusiast

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