From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xing Zheng Subject: Re: [PATCH 2/3] dmaengine: pl330: enable burst mode by parsing dt Date: Sun, 7 Aug 2016 17:20:33 +0800 Message-ID: <57A6FD61.6080003@rock-chips.com> References: <1470365602-32586-1-git-send-email-shawn.lin@rock-chips.com> <1470365602-32586-3-git-send-email-shawn.lin@rock-chips.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <1470365602-32586-3-git-send-email-shawn.lin@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org To: Shawn Lin , Vinod Koul Cc: Rob Herring , Huibin Hong , devicetree@vger.kernel.org, dianders@chromium.org, briannorris@chromium.org, Caesar Wang , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org List-Id: linux-rockchip.vger.kernel.org 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 > Cc: Xing Zheng > Signed-off-by: Shawn Lin > --- > Tested-by: Xing Zheng Thanks -- - Xing Zheng