Re: atyfb expert needed

[Alexander Kern <alex.kern@gmx.de>]

Am Donnerstag, 12. Februar 2004 10:29 schrieb Geert Uytterhoeven:
> On Thu, 12 Feb 2004, Benjamin Herrenschmidt wrote:
> > The current driver in James tree (with generic lcd support) breaks
> > the display on the LT-G chip of the powerbook wallstreet. I don't
> > have time at the moment to dig into every change (there's a lot).
> >
> > The "effect" is that the screen appears to be cut in vertical bands,
> > each of them displaying a slightly offseted version of what should be
> > there with some noise near the right edge.
> >
> > If that symptom rings any bell about what registers can be wrong,
> > that would help me a lot figuring out what's up.
>
> Sounds like a problem with DSP_CONFIG and DSP_ON_OFF.
>
> Check aty_dsp_gt(), either the value of fifo_size or the dsp_* values.
>
> BTW, according to Daniël Mantione the DSP calculations in atyfb have always
> been wrong (but apparently worked on most machines due to sheer luck ;-),
> so you may want to compare with aty_dsp_gt() in current 2.4.
>
> Gr{oetje,eeting}s,
>
> 						Geert
>

Hi,
mach64_ct.c(where aty_dsp_gt is) from James tree should be identical with 
Daniel'S 2.4 tree. If not, please send me the diff.

Regards Alex


-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id\x1356&alloc_id438&op=click