[PATCH 0/2] Free running cyclic transfer implementation for pl330

sugar sugar.zhang at rock-chips.com
Mon Apr 17 19:26:59 PDT 2017

Hi Alexander,

I have tested this series on rk3399 evb board and works well.

Tested-by: Sugar Zhang <sugar.zhang at rock-chips.com>

在 4/14/2017 22:35, Alexander Kochetkov 写道:
> Hello!
> This series contain free running cyclic transfer implementation for pl330.
> It affect ALL chips using pl330 (not only rockchip) and
> allow to run cyclic transfers without CPU intervention. As a result
> it fix sound clicks (observed and not yet observed) because
> sound clicks must be heard under heavy system load due to the way
> how cyclic transfers implemented now for pl330.
> My previous series[1] doesn't get enough attention (no one except me
> tested it). And it don't get upstream:
>> 8-03-2016, 6:03, Vinod Koul <vinod.koul at intel.com> *:
>> Overall this series looks okay, but can someone test this. I would not like
> pl330 to be broken again
> Now I was asked about the series[1] again by guys from Rockchip,
> so I send rebased against 4.10.10 version. Hope, someone might test it
> and confirm that patches work fine.
> Regards,
> Alexander.
> Alexander Kochetkov (2):
>   dmaengine: pl330: make cyclic transfer free runnable
>   dmaengine: pl330: don't emit code for one iteration loop
>  drivers/dma/pl330.c |  200 +++++++++++++++++++++++++--------------------------
>  1 file changed, 98 insertions(+), 102 deletions(-)

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