On Thu, 2019-08-22 at 15:14 +1000, Benjamin Herrenschmidt wrote: > - No UDC driver other than dummy sets max_streams, and f_tcm requires 4, > so f_tcm will fail with *any* superspeed UDC driver as far as I can tell. > > Was it ever tested with USB 3 ? Ok so I spoke too soon... dwc3 does, I didn't notice bcs it doesn't live in drivers/usb/gadget... So Sebastian, what would be the best way to "fallback" to non-stream use rather than just fail probing ? Do we really want the autoconf EP matching to enforce the stream numbers ? If we allow it to not match, then f_tcm could check after matching if enough streams were found and disable stream support if not. Another option would be to make this 2-pass, though that complicates even more: a first pass where we enforce the stream count, and if we fail, a second pass where we ignore them. Suggestions ? Cheers, Ben.
