[alsa-devel] [PATCH] ASoC: imx-ssi: Fix mono playback

Tabi Timur-B04825 B04825 at freescale.com
Tue Aug 7 14:00:14 CEST 2012

Trent Piepho wrote:
> It depends on the codec connected to the I2S.  We have SSI that works
> in mono mode, using a modified driver.  Our codec allows mono playback
> by only using the samples on the left channel.

I would *love* to see that driver.

> There is the race issue in that playback and record must both match
> mono and stereo and ALSA doesn't handle substreams with constraints
> that depend on other substreams in a race free manner.

Isn't that only a problem if both streams are opened literally 
simultaneously?  I would assume that most apps will open one stream at a time.

Timur Tabi
Linux kernel developer at Freescale

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