linux-kernel - Re: [PATCH V2 7/7] dmaengine/dw_dmac: implement pause and resume in dwc

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Date:	Tue, 19 Apr 2011 14:40:07 +0530
From:	viresh kumar <viresh.kumar@...com>
To:	Jamie Iles <jamie@...ieiles.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"vinod.koul@...el.com" <vinod.koul@...el.com>,
	"dan.j.williams@...el.com" <dan.j.williams@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Armando VISCONTI <armando.visconti@...com>,
	Shiraz HASHIM <shiraz.hashim@...com>,
	amitgoel <amit.goel@...com>,
	"viresh.linux@...il.com" <viresh.linux@...il.com>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>
Subject: Re: [PATCH V2 7/7] dmaengine/dw_dmac: implement pause and resume
 in dwc_control

On 04/19/2011 02:25 PM, Jamie Iles wrote:
>>From the Synopsys datasheet it looks to me like pausing by clearing the 
> channel enable bit could cause data to be lost.  I think you need to set 
> the CH_SUSP bit and wait for the FIFO_EMPTY flag to go high then disable 
> the channel.

Yes, Previously i looked at some other doc of dwc and couldn't find this info.
But now found it in datasheet. Will correct and resend it.

-- 
viresh
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