[RFC][PATCH] Disintegrate sharpsl_param.c

[Cyril Hrubis]

Hi!
> > > I recently tried running 3.6-rc2 kernel on my Sharp Zaurus C-1000. It 
> > > hanged almost immediately after uncompressing the kernel. I tracked the
> > > problem down to a single line in arch/arm/common/sharpsl_param.c:
> > > 
> > > memcpy(&sharpsl_param, (void *)PARAM_BASE, sizeof(struct sharpsl_param_info));
> > > 
> > > Commenting out the line makes the kernel boot just fine. This left me
> > > wondering whether sharpsl_param.c is actually needed. Here's a comment
> > > from sharpsl_param.c that describes what sharpsl_param.c actually does:
> > 
> > Sharp went to the trouble of saving these values into the hardware and
> > passing them into the drivers. They're basically used by the LCD
> > initialisation code from what I remember. I don't remember what the
> > risks are of incorrect values.
> 
> We were seeing strange flicker on LCD on some machines...? Particulary
> metan's machine with wifi on did that. OTOH it looked like some kind
> of DMA issue.

Yes, the problems with my LCD are DMA related (too much DMA to wifi cf card
causes timing issues on display refresh). When there is no network activity
it's okay.

And as far as I remeber there are some magic values needed for the LCD in order
not to have distorted picture (blurred, etc.) There is a callibration program
in the service menu that allows you to modify the values stored in the flash.

I remeber Stanislav did some research on that (CCing).

-- 
metan