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Message-ID: <ADE657CA350FB648AAC2C43247A983F0020696D48EEB@AUSP01VMBX24.collaborationhost.net>
Date: Fri, 23 Mar 2012 11:09:50 -0500
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Mika Westerberg <mika.westerberg@....fi>
CC: Rafal Prylowski <prylowski@...asoft.pl>,
"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 Friday, March 23, 2012 12:05 AM, Mika Westerberg wrote:
> On Thu, Mar 22, 2012 at 09:19:10PM -0500, H Hartley Sweeten wrote:
>
>> Did you test this patch or just review it?
>
> I tested and reviewed it.
OK. What kernel? My tests so far have been with 3.3.
>> 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?
>
> Did you try without your patch and adding my VIC hack? That's what I did when
> I first got this patch and I saw no problems. I tested with audio (M2P),
> mmc_spi (M2M) and dmatest (M2M).
No, I have not applied your VIC hack.
Until we get a working solution, without any hacks, I don't want this to go in.
Regards,
Hartley
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