[PATCH] fix-glamo-reissue-memory-settings-during-resume.patch

[Holger Freyther]

On Monday 24 March 2008 15:46:43 Andy Green wrote:
> The "black snow" effect after resume seems to be caused by the
> memory in the glamo needing to be reset after the
> "deep power down".  This patch rewrites a subset of registers in
> that area on resume (reinitializing them all destroys the video
> output action) and removes the black snow issue.
>
> The "black snow" is logical corruption of the pixel data in the
> glamo confirmed by locking a scope to VYSNC and looking at the
> pixel data at the same offset over multiple frames, it was
> changing frame by frame logically for the same offset.  So it
> makes sense the underlying cause of problems here is the memory
> in the Glamo.
>
> Also, sometimes when the SD card was kicked into 16MHz speed after
> resume it failed, this is also believed to be to the Glamo internal
> memory which the SD peripheral also uses being in a bad state on
> resume and this might also be helped.

Hey Andy,

yeah this makes the device usable after a resume! My only wish would be to 
blank the LCM sooner and undo the blanking later :)


z.