Re: [PATCH v21 22/39] ALSA: usb-audio: Prevent starting of audio stream if in use

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Pierre,

On 5/7/2024 2:20 PM, Pierre-Louis Bossart wrote:

If a PCM device is already in use, the check will return an error to
userspace notifying that the stream is currently busy.  This ensures that
only one path is using the USB substream.

What was the point of having a "USB Mixer" then?

The USB mixer is intended to enable/route the USB offloading path to the audio DSP, and is for controlling the ASoC specific entities. This change is needed to resolve any contention between the USB SND PCM device (non offload path) and the ASoC USB BE DAI (offload path).

Thanks
Wesley Cheng




[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux