linux-kernel - Re: dmaengine: dw-dmac: Custom cyclic API (Why?)

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Date:   Tue, 4 Apr 2017 17:43:18 +0100
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Vinod Koul <vinod.koul@...el.com>
CC:     "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        <vireshk@...nel.org>
Subject: Re: dmaengine: dw-dmac: Custom cyclic API (Why?)

Hi Andy,


On 04-04-2017 17:23, Andy Shevchenko wrote:
> On Mon, 2017-01-02 at 13:56 +0000, Jose Abreu wrote:
>> On 02-01-2017 11:30, Andy Shevchenko wrote:
>>> On Mon, 2017-01-02 at 15:48 +0530, Vinod Koul wrote:
>>>> On Mon, Jan 02, 2017 at 10:38:00AM +0200, Andy Shevchenko wrote:
>>>>> On Fri, 2016-12-30 at 12:05 +0000, Jose Abreu wrote:
>
>>> Actually we have AVR32 connected to our lab. So, I can test it
>>> there,
>>> but I rather need a patch to use some dummy stub instead of codec
>>> (it
>>> has no codec connected).
>>>
>> Thank you all for the info. I don't have the HW ready to test yet
>> (I was collecting some info first), but when I do I can test on
>> my side using Designware I2S and ALSA SoC DMA engine.
> Just TWIMC, AVR32 is going to be removed from kernel.
> It means in particularly I will follow up and remove related bits in
> dw_dmac driver, including custom cyclic API.
>

Thanks for sharing this! Unfortunately the plans to include a DMA
for I2S audio were postponed so I never got to the point of
implementing/testing it. As I don't see any plans in using this
cyclic DMA for now I guess if I need to use it I will implement
it again using the standard cyclic DMA engine API.

Best regards,
Jose Miguel Abreu