From: lars@metafoo.de (Lars-Peter Clausen)
To: linux-arm-kernel@lists.infradead.org
Subject: [alsa-devel] [RFC v2 PATCH 1/1] ASoC: soc-core: symmetry checking for each DAIs separately
Date: Wed, 31 Aug 2011 14:17:15 +0200 [thread overview]
Message-ID: <4E5E264B.8000004@metafoo.de> (raw)
In-Reply-To: <4E5E213A.8040909@freescale.com>
On 08/31/2011 01:55 PM, Tabi Timur-B04825 wrote:
> Liam Girdwood wrote:
>> Timur, iirc your driver has some special symmetry requirement (maybe something todo with having 2 DAIs) ?
>>
>> I assume this is OK for you too ?
>
> Yes, that's why I was asking. I believe I'm affected by this patch as
> well, so I will test it. However, I never noticed a problem before, so
> I'm not sure what's going on.
>
The problem is that if the DAI is shared between two links the symmetry
constraint is not applied and both links could be configured to run at
different rates.
Without the patch for example 'aplay -r 8000 ... & arecrod -r 16000 ...' would
result in playback running twice as fast as it is supposed to.
next prev parent reply other threads:[~2011-08-31 12:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-29 9:15 [RFC v2 PATCH 1/1] ASoC: soc-core: symmetry checking for each DAIs separately Dong Aisheng
2011-08-29 20:34 ` [alsa-devel] " Tabi Timur-B04825
2011-08-30 2:54 ` Dong Aisheng-B29396
2011-08-31 10:52 ` Liam Girdwood
2011-08-31 11:55 ` Tabi Timur-B04825
2011-08-31 12:17 ` Lars-Peter Clausen [this message]
2011-09-01 18:58 ` Timur Tabi
2011-09-01 19:32 ` Lars-Peter Clausen
2011-09-01 20:35 ` Timur Tabi
2011-09-16 3:02 ` Dong Aisheng
2011-09-02 14:44 ` Wolfram Sang
2011-09-21 14:59 ` Mark Brown
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