Re: radeonfb on pegasos powerpc motherboard and X endianess problem

On Thu, 5 Jun 2003, Sven Luther wrote:

On Thu, Jun 05, 2003 at 09:59:47AM +0200, Benjamin Herrenschmidt wrote:

quoted

On Wed, 2003-06-04 at 16:54, Sven Luther wrote:

quoted

So, since this is a pegasos, based on the pop specification, which in
turn are related to the chrp ones, and i was told that most chrp
motherboard did endianess inversion in the northbridge or something
such, and i believe that the pegasos doesn't do so, is it possible that
this is the cause, and that XFree86 know how to program the graphic card
to do endianess conversion, and fbdev knows not, or maybe that the
XFree86 radeon driver doesn't know how to act exactly and accidentally
reverts the endianess conversion or something such.

Using the fbdev driver in xfree86, i get a seemingly working X, but the
background X image is yellowish and the mode is not set correctly it is
correct, but the image is a bit smaller than the screen, and centered or
moved to the right.

Does someone know with more exactitude what the situation is exactly
with regard the kernel and endianess conversion with the different
powerpc subarches.

Endianness shouldn't be related to the subarch at all

Ah, so it is not true that one chrp, the northbridge did the endianess
conversion transparently ?

No, PCI is little endian. And fortunately the VLSI Golden Gate II in my
Longtrail doesn't try to outsmart the user, unlike some PCI host bridges in
some MIPS SoCs...

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@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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