Re: [alsa-devel] [PATCH v2 17/17] ASoC: fsl: add imx-sgtl5000 machine driver

Mark Brown wrote:

That would be *really* bad, simultaneous playback and record is very widely used.

Especially since I already have that working on PowerPC. I went through great lengths to get the device tree binding and the code working in this regard.

If the hardware has constraints on the sample rates the driver should be telling the application about this. For the very common case where you need the same rate for playback and record there's framework support for doing this, the relevant driver just needs to set the symmetric_rates flag and the core will do everything.

And my driver currently does this. If the SSI is wired up in synchronous mode, sample rate/size locking is enabled.