On Tue, Dec 27, 2022 at 03:02:31PM +0100, Takashi Iwai wrote: > Greg KH wrote: > > On Tue, Dec 27, 2022 at 01:04:55PM +0000, Mark Brown wrote: > > > On Sat, Dec 24, 2022 at 10:02:59AM +0100, Greg KH wrote: > > > > "be"? What is that? > > > Back end. This is a concept in DPCM which should be reasonably > > > discoverable to people working on the audio portions of this code. > > Ok, then how is the reference counting logic handled here? USB devices > > can be removed from the system at any point in time... > The whole picture is fairly complex, and this patch is a part > belonging to the ASoC machine driver -- that is, it's bound to the > Qualcomm host, and there can be only one on a system. > OTOH, USB audio devices are still managed by the existing USB audio > driver as is, and they can be multiple and any devices. The basic > idea here is a hijack of the USB data processing in USB audio driver > with the offloading mechanism by this ASoC driver (only if the > condition met). Right. I haven't even begun to look at the actual code here, just triaging my inbox, so I've got no thoughts on if things work or not.
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