linux-kernel - Re: [RFC] dmaengine: omap-dma: Start DMA without delay

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Message-ID: <alpine.DEB.2.01.1303291533540.26456@pmeerw.net>
Date:	Fri, 29 Mar 2013 15:36:07 +0100 (CET)
From:	Peter Meerwald <pmeerw@...erw.net>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
cc:	Russell King <rmk+kernel@....linux.org.uk>,
	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
	Tony Lindgren <tony@...mide.com>,
	Jarkko Nikula <jarkko.nikula@...mer.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Felipe Balbi <balbi@...com>, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC] dmaengine: omap-dma: Start DMA without delay


> Remove the use of a tasklet to start the DMA channel when issue_pending is
> called.
> The use of tasklet delays the DMA start which can cause issues at drivers,
> for example the audio drivers expect that the DMA is started right away.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>

I've reported the problem and now tested the patch applied on top of 
3.8.5, running on beagle-xm; sounds good, so

Tested-by: Peter Meerwald <p.meerwald@...-electronic.com>

-- 

Peter Meerwald
+43-664-2444418 (mobile)
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