Re: [PATCH 2/3] dmaengine: pl330: enable burst mode by parsing dt

From	Xing Zheng <zhengxing@rock-chips.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 2/3] dmaengine: pl330: enable burst mode by parsing dt
Date	2016-08-07 11:30 +0200
Message-ID	<s3sz7-1Tz-13@gated-at.bofh.it> (permalink)
References	<s2DwB-1FQ-3@gated-at.bofh.it> <s2DwC-1FQ-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi Shawn,

On 2016年08月05日 10:53, Shawn Lin wrote:
> Currently pl330 use single mode defaultly. But burst
> mode can improve efficiency of memory accessing. We
> couldn't enable it by defalut in case of breaking any
> Socs which don't support it.
>
> With burst mode supported, we could see the improvement
> significantly when tesing SPI transfer etc.
>
> default single mode
> [   88.292550] spi write 65536*1 cost 32402us speed:2022KB/S
>
> After applied with burst mode(len 16)
> [   17.625296] spi write 65536*1 cost 17830us speed:3675KB/S
>
> Cc: Huibin Hong <huibin.hong@rock-chips.com>
> Cc: Xing Zheng <zhengxing@rock-chips.com>
> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
> ---
>
Tested-by: Xing Zheng <zhengxing@rock-chips.com>

Thanks

-- 
- Xing Zheng

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[PATCH 2/3] dmaengine: pl330: enable burst mode by parsing dt Shawn Lin <shawn.lin@rock-chips.com> - 2016-08-05 05:00 +0200
  Re: [PATCH 2/3] dmaengine: pl330: enable burst mode by parsing dt Xing Zheng <zhengxing@rock-chips.com> - 2016-08-07 11:30 +0200

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