Re: [PATCH v24 23/34] ALSA: usb-audio: Prevent starting of audio stream if in use

Amadeusz Sławiński
2024-08-06T14:58:30Z

On 8/1/2024 3:17 AM, Wesley Cheng wrote:
> With USB audio offloading, an audio session is started from the ASoC
> platform sound card and PCM devices. Likewise, the USB SND path is still
> readily available for use, in case the non-offload path is desired. In
> order to prevent the two entities from attempting to use the USB bus,
> introduce a flag that determines when either paths are in use.
>

How can this happen? Can you provide some example with list of devices
and which one should block the other? If I recall correctly devices are
already exclusive unless you support substreams which ASoC does not at
the moment.