Re: [Dri-devel] ati RF 128: no agp

[Keith W. <ke...@va...>]

Adam K Kirchhoff wrote:
> 
> On Thu, 15 Jun 2000, Keith Whitwell wrote:
> 
> > Adam K Kirchhoff wrote:
> > >
> > > On Thu, 15 Jun 2000, Keith Whitwell wrote:
> > >
> > > > Adam K Kirchhoff wrote:
> > > > >
> > > > > While we're on the topic of Rage128, I thought I'd add my comments.  I
> > > > > pulled the ati branch last night and compiled.  This is the first time in
> > > > > about a month and a half that I've updated this code on my end.
> > > > >
> > > > > With the previous compile, I kept having a problem every time I tried to
> > > > > load the r128.o module...  If I used any kernel higher than the 2.2.*
> > > > > series, it would give me an "Ooops", show the module in lsmod, but say
> > > > > that it was "initializing" (no matter how long I would wait).  As a
> > > > > result, direct rendering was disabled (I sent this in as a bug report)...
> > > > > However, since my card is a PCI AIW 128, I didn't need agp support, and
> > > > > was perfectly content to run 2.2.14.  In addition, every GL app that I
> > > > > tried would give some awful flickering...  For example, in Q3 every other
> > > > > frame I could see through walls and floors.
> > > > >
> > > > > Anyway, with this new build, the kernel module loaded without any
> > > > > problems on 2.4.0-test1.  The flickering was still there, however.  And
> > > > > I'm not sure if this is due to improvements in the code, or simply because
> > > > > I'm running a newer kernel, but I *appear* to be getting a couple more fps
> > > > > under 2.4.0 than I was under 2.2.14.  Of course, it's still painfully slow
> > > > > without PCI Gart support, but that's to be expected, I guess.
> > > > >
> > > > > Adam
> > > >
> > > > Just out of interest, isn't it the case that PCI cards on a motherboard with
> > > > AGP support can still view the AGP region -- ie they don't need PCI gart to
> > > > get contiguous memory, they just miss out on the higher bandwidth AGP allows?
> > > >
> > > > Keith
> > > >
> > >
> > > So, since I have a SiS motherboard with agp support (it has a SiS graphics
> > > chip that I've disabled in the BIOS), I can still use the AGP region and
> > > get better support?  If that's true, that'll be great.  I'm currently
> > > recompiling my kernel, and adding the agpgart module.  Should I build it
> > > specifically for SiS support, or not specifiy support for any one chipset?
> > >
> > > Anyway, I'll give it a shot without specifying SiS support, and let you
> > > know what happens tonight.
> >
> > I don't think our drivers take advantage of this combination (PCI card on an
> > AGP motherboard)...  I'm not even sure if it's possible or not, but I seem to
> > remember that it is.  If so, you might be able to add a small amount of code
> > to the driver to take advantage -- but it would probably have to be your
> > project...
> >
> > Keith
> >
> 
> Are there still plans on adding PCI gart support at some point in the
> future?

I beleive so.  

Keith