Re: radeon-pre-2

[Alex Deucher <alexdeucher@gmail.com>]

On Sun, 12 Sep 2004 20:45:18 -0400 (EDT), Vladimir Dergachev
<volodya@mindspring.com> wrote:
> 
> 
> On Sun, 12 Sep 2004, Michel [ISO-8859-1] D�nzer wrote:
> 
> > On Sun, 2004-09-12 at 23:42 +0100, Dave Airlie wrote:
> >>
> >> I think yourself and Linus's ideas for a locking scheme look good, I also
> >> know they won't please Jon too much as he can see where the potential
> >> ineffecienes with saving/restore card state on driver swap are, especailly
> >> on running fbcon and X on a dual-head card with different users.
> >
> > Frankly, I don't understand the fuss about that. When you run a 3D
> > client on X today, 3D client and X server share the accelerator with
> > this scheme, and as imperfect as it is, it seems to do a pretty good job
> > in my experience.
> 
> Not that good - try dragging something while a DVD video is playing.

The overlay could be converted to use the CP engine as well. right now
it has to switch to MMIO for overlay.

Alex

> 
> But, I don't understand what the fuss is about either. What's wrong with
> putting PLL setting code inside DRM driver and letting it be the client of
> fbcon ? And the transition problems could be well solved by leaving the
> existing fbcon in for the time being, it is not like the kernel does not
> have duplicate drivers.
> 
>                       best
> 
>                         Vladimir Dergachev
> 
> 
> 
> >
> >
> > --
> > Earthling Michel Dänzer      |     Debian (powerpc), X and DRI developer
> > Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer
> >
> >
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