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

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 _startup if playback or capture is currently in process, or will ALSA first call the _trigger to stop/pause the driver.

If ALSA does stop/pause the driver before changing parameters, then I can safely assume the device is always disabled during those functions.