On Thu, 2016-01-14 at 00:36 +0800, Tom Yan wrote: > Hmm, but a single jack doesn't mean that the driver should only > provide a single "device" for the card? The interface/signal is still > different, no? The driver provides only one playback device. I think the driver doesn't have any way to know the mode either, although I could be wrong (if it does have the information, it would be great if the driver would expose the information to the userspace too). --Â Tanu