Re: [alsa-devel] Will ALSA ever call _prepare or _hw_params while it's playing?

Timur Tabi wrote:

I have an ASoC driver with a _hw_params, _prepare, and _trigger functions. I've recently discovered that I need to keep one of my devices disabled until playback starts.

So I would like to know if ALSA will ever call _hw_params, _prepare, or _trigger if playback or capture is currently in process, or will ALSA first call the _trigger to stop/pause the driver.

While a stream is running (after trigger with START), ALSA will only call the pointer or the trigger (STOP/PAUSE/SUSPEND) callbacks.

Different streams are not synchronized in any way. (This also applies to the playback/capture streams of one card.)

Regards, Clemens