linux-kernel - RE: [PATCH] ep93xx: Implement double buffering for M2M DMA channels

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Message-ID: <ADE657CA350FB648AAC2C43247A983F0020696D48E3E@AUSP01VMBX24.collaborationhost.net>
Date:	Thu, 22 Mar 2012 21:19:10 -0500
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Mika Westerberg <mika.westerberg@....fi>,
	Rafal Prylowski <prylowski@...asoft.pl>
CC:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"vinod.koul@...el.com" <vinod.koul@...el.com>,
	"rmallon@...il.com" <rmallon@...il.com>
Subject: RE: [PATCH] ep93xx: Implement double buffering for M2M DMA channels

On Wednesday, March 21, 2012 12:39 PM, Mika Westerberg wrote:
> On Tue, Mar 20, 2012 at 09:09:26AM +0100, Rafal Prylowski wrote:
>> Implement double buffering for M2M DMA channels.
>> 
>> Signed-off-by: Rafal Prylowski <prylowski@...asoft.pl>
>
> The subject line prefix should probably be 'dmaengine/ep93xx_dma: ' but
> otherwise this looks good.
>
> Acked-by: Mika Westerberg <mika.westerberg@....fi>

Mika,

Did you test this patch or just review it?

On my system it doesn't work. I think it has something to do with the
changes to m2m_hw_interrupt but I haven't tracked it down yet.

It looks like what's missing is a:

	edmac->edma->hw_submit(edmac);

But, maybe that's not needed with double buffering?

Regards,
Hartley


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