[alsa-devel] [PATCH v2 1/2] ASoC: core: Add flag to ignore pmdown_time at pcm_close

Nallasellan, Singaravelan singaravelan.nallasellan at intel.com
Fri Oct 21 19:01:40 CEST 2011

I think the requirement is to delay the power down the link during the  music playback. There is a possibility that next song will start playing sooner. In this case, try to avoid power down and power up the DAI immediately. In case of voice call, it is not expected to have voice call immediately after a call. It can be closed. Phone stack can go ahead and close the modem path but codec path will still be open. This will cause glitches.

How will this scenario be glitch free?

-----Original Message-----
From: alsa-devel-bounces at alsa-project.org [mailto:alsa-devel-bounces at alsa-project.org] On Behalf Of Babu, Ramesh
Sent: Friday, October 21, 2011 3:59 AM
To: Mark Brown
Cc: Peter Ujfalusi; alsa-devel at alsa-project.org; Liam Girdwood; Misael Lopez Cruz
Subject: Re: [alsa-devel] [PATCH v2 1/2] ASoC: core: Add flag to ignore pmdown_time at pcm_close

> This clearly isn't something that should be set in the CODEC driver, 
> it's a system integration issue - on a different board there might be 
> no such requirement.

Hmm... Ok. Thanks for clarification.

If it is a board specific requirement, then would it make sense to have it in dai_link as per Peter Ujfaulsi's RFC [1].

In general, how this kind of situation is handled?

[1] http://mailman.alsa-project.org/pipermail/alsa-devel/2011-October/045088.html

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