linux-kernel - Re: EXT: pre 4.9-rc dma regression, imx6 sound etc

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Date:   Thu, 13 Oct 2016 08:38:39 +0300
From:   Mika Penttilä <mika.penttila@...tfour.com>
To:     "Han, Nandor (GE Healthcare)" <nandor.han@...com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: EXT: pre 4.9-rc dma regression, imx6 sound etc

On 10/13/2016 08:25 AM, Han, Nandor (GE Healthcare) wrote:
> 
> 
> On 12/10/2016 16:25, Mika Penttilä wrote:
>> Hi!
>>
>> Bisected that commit 5881826 - "    dmaengine: imx-sdma - update the residue calculation for cyclic channels" is first bad commit to cause audio regression on imx6q, sgtl5000 codec. It causes audible disturbing background noise when playing wavs.
>>
>> Unfortunately, reverting only 5881826 causes uarts to fail, so another fix is needed.
>>
>> Thanks,
>>
>> Mika
>>
>>
>>
>>
>>
> 
> Hi Mika,
>    Thanks for info. I have already posted a patch that will fix this issue.
> 
> https://lkml.org/lkml/2016/10/11/319
> 
> It was already tested on imx6 and imx53. Let me know how it works.
> 

Hi,

Great, with this patch audio is ok again! This patch should go in for 4.9!

Thanks,
Mika