>
> If there is any undocumented knob to increase the DEBE DMA burst size,
> that would very likely resolve the problem. Another interesting thing
> is that PRECHARGE/ACTIVATE latency is critical. Higher DRAM clock speed
> only helps indirectly by reducing this latency.
> 
> And by the way, the DEBE in Allwinner A20 does not seem to be affected.
> Only Allwinner A10 suffers from these FullHD troubles.

Some obvious questions...

Were you testing this with the scaler (DEFE) enabled, or were you using 
layers directly?

Are you seeing this over VGA as well?

Luc Verhaegen.

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