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

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.