[linux-fbdev] Matrox and XFree86 4.0.2 update

[Geert Uytterhoeven]

On Thu, 25 Jan 2001, Tom Rini wrote:
> On Thu, Jan 25, 2001 at 12:38:25PM +0100, Geert Uytterhoeven wrote:
> > On Thu, 25 Jan 2001, Kostas Gewrgiou wrote:
> > > On Wed, 24 Jan 2001, Petr Vandrovec wrote:
> > > > On 24 Jan 01 at 11:11, Ani Joshi wrote:
> > > > > I recently ran into an issue with the matroxfb driver and XFree86 4.0.2's
> > > > > matrox driver.  Sometime in the past someone decided to use BE
> > > > > register access in matroxfb for BE machines, while this is probably The
> > > > > Right Way, it produces problems in X.  I can use BE register access
> > > > > macro's in X but it was causing problems with the engine, perhaps some DMA
> > > > > issue although the dma BE bits are on.
> > > >
> > > > Using big-endian on PPC was required by PPC users for compatibility with
> > > > existing XF[86][68]_FBDev servers. Are you sure that there are no problems
> > > > otherwise, and that it works correctly on all PReP/CHRP/???? architectures?
> > >
> > > Nope it won't cause any problems, none of the XF[86][68]_FBDev servers where
> > > accelerated for matrox, other libs (SDL etc) that have accel for matroxfb
> > > don't work correctly for ppc either.
> >
> > XF68_FBDev is accelerated for matroxfb, at least on the PPC platform.
>
> Er, it is?  I thought only Xpmac was...

I just checked the Debian binary, and indeed it isn't. IIRC patches existed a
few years ago.

Hmmm, I just noticed I'm not using the potato XF68_FBDev but some other special
3.3.4 version called XF68_FBDev.15bppOK (dated aug 1999), which I probably
compiled myself. It works with `DefaultColorDepth 15', while the Debian 3.3.6
variant doesn't work in depth 15, only in depth 16.

In other words: it looks like the fixes to make depth 15 (which is correct, bpp
is 16) work never made it into the official release...

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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