Re: [linux-fbdev] [PATCH] clgenfb on PPC

[Tom Rini]

On Wed, Jan 03, 2001 at 01:50:46PM +0100, Geert Uytterhoeven wrote:
> On Tue, 2 Jan 2001, Tom Rini wrote:
> > Hey all.  While going through the 2.4 tree and removing dead CONFIG_xxx's for
> > PPC stuff, I noticed clgenfb still had CONFIG_PREP stuff (which may have
> > partily explained why it no longer worked here).  I've attached a patch, that
> > with another patch to fix some PCI issues on certain machines, gives me a
> > working (so far, can't test heavily yet tho) framebuffer on my powerstack.
> > 
> > Comments?
> 
> To me it looks like most of them depend on `big endian', not on `PReP'.

Possibly...  I don't have or know anyone with the MacPicasso video card,
which is the only other card which may have this. :)

> BTW, doesn't the Cirrus Logic graphics chip have a big endian aperture? I 
> don't like things like green.offset = -3, since it will probably break some
> applications (did you run X?).

I finally got the machine up w/ an nfsroot, and played around a bit.  w/o the
patch (ie isPReP always 0) I don't get a console, but a few lines of pixels in
a row, and random pixels here and there.  Since the original logic was for
PReP only, I'm inclined to think that keeping it at just _machine == _MACH_prep
is the safest way to go, for the moment.

BTW, with or w/o the patch, XF4 (fbdev) wouldn't quite work right.  The logs 
didn't indicate anything wrong, but the monitor went black, like X was 
starting, but never did. (ShadowFB on / off)

-- 
Tom Rini (TR1265)
http://gate.crashing.org/~trini/