[U-Boot] amcc kilauea odd crashes

["Markus Klotzbücher" <mk@denx.de>]

On Thu, Oct 23, 2008 at 01:30:08PM +0200, Stefan Roese wrote:
> Hi Wolfgang,
> 
> On Thursday 23 October 2008, Wolfgang Denk wrote:
> > > > Should we not backout the autocalib patches that cause the problem
> > > > until a stable working solution is found?
> > >
> > > Not sure. My hope is that AMCC find a solution quickly. They should
> > > receive the failing board this week.
> > >
> > > And they already did send a "fix" (more a workaround) for this problem:
> > >
> > > [PATCH v2] ppc4xx: Fix DDR2 auto calibration on Kilauea 600MHz
> > >
> > > which you rejected. So I suggest to wait for a few days.
> >
> > Well, that was one full month ago, and nothing happened since.1s
> 
> That's not correct. One patch got checked in which definitely made the 
> situation better:
> 
> f8a00dea841d5d75de1f8e8107e90ee1beeddf5f
> 
>     ppc4xx: Reset and relock memory DLL after SDRAM_CLKTR change
>     
>     After changing SDRAM_CLKTR phase value rerun the memory preload
>     initialization sequence (INITPLR) to reset and relock the memory
>     DLL. Changing the SDRAM_CLKTR memory clock phase coarse timing
>     adjustment effects the phase relationship of the internal, to the
>     PPC chip, and external, to the PPC chip, versions of MEMCLK_OUT.
>     
>     Signed-off-by: Adam Graham <agraham@amcc.com>
>     Signed-off-by: Victor Gallardo <vgallardo@amcc.com>
>     Signed-off-by: Stefan Roese <sr@denx.de>
> 
> Unfortunately it didn't fix all problems. AMCC already provided another patch 
> for testing purposes. Not to the list but to me (and you) directly. Please 
> find it attached again. Would be great if Markus could test it on the failing 
> Kilauea.

I tested it and it's still failing. I dare say the patch makes things
worse. After about 20 hard resets the board didn't reach the u-boot
console a single time.

:-(

Thanks
Markus


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