Re: radeonfb on pegasos powerpc motherboard and X endianess problem

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Thu, 2003-06-05 at 13:58, Sven Luther wrote:
> On Thu, Jun 05, 2003 at 01:42:30PM +0200, Benjamin Herrenschmidt wrote:
> > On Thu, 2003-06-05 at 10:19, Sven Luther wrote:
> > 
> > > Err, is that the same devel tree as the one in linuxppc_2_4_devel ?
> > 
> > No, it's linuxppc_2_4_benh bk, though you can use rsync to extract
> > just radeonfb from rsync.penguinppc.org::benh-devel.
> 
> Mmm, i think i am just a bit lost with all the ppc kernel trees ...
> Which one should i work on.

Yup, 2.4 is a mess ... For a new platform like that, I suggest 
working on linuxppc_2_4 or Marcelo tree directly

> .../...
>
> I don't know about the radeon driver exactly but the glint driver i did
> work on did a mode setup when comming from the VT switch, after having
> saved the registers it touches for the consoles benefit. It then
> proceeded to reinitialize the accel pipeline, complete with a sync and
> all. I guess newer hardware have easier way to do this, and this doesn't
> speak about the DRI case, but probably all the X driver do it such. When
> switching back, they restore the registers they have touched, more
> probably only the mode setting registers, and don't care about the accel
> regs, since text mode don't touch them.

Which is the problem ;) radeonfb do use the accel engine for text
rendering, which is why things aren't pretty when coming from X
(actually, I noticed X tends to fuckup the accel engine when quit
even while it's not the frontmost console, so there's probably also
a bug in X)


> Ok, so it must be another kind of problems, but then, my matrox board,
> which Geert (or someone else) said did run on his chrp board, did not
> work well for me.

Could be a problem with how the firmware did/did not initialize it

Ben.



-------------------------------------------------------
This SF.net email is sponsored by:  Etnus, makers of TotalView, The best
thread debugger on the planet. Designed with thread debugging features
you've never dreamed of, try TotalView 6 free at www.etnus.com.