These two patches improve the isoc handling and make the dwc3 gadget driver somewhat usable with the UVC gadget for isochronous endpoints. The first patch makes starting isochronous transfers more reliable. I think it's more less, what Thinh suggested some time ago[1]. It's still not perfect because the first request must still be queued within 2 seconds but it's a lot better than the current situation. The second patch makes it possible to have gaps in the data stream. The UVC gadget relies on such behaviour. Without this, using the UVC gadget with a live stream stops after the first frame, because all later frames are dropped. I'm not sure if this is the correct solution, but all other drivers currently work this way, from what I can tell. Regards, Michael [1] https://marc.info/?l=linux-usb&m=156088170723824&w=4 Michael Olbrich (2): usb: dwc3: gadget: make starting isoc transfers more robust usb: dwc3: gadget: restart the transfer if a isoc request is queued too late drivers/usb/dwc3/core.h | 1 + drivers/usb/dwc3/gadget.c | 39 +++++++++++++++++++++++++++++++-------- 2 files changed, 32 insertions(+), 8 deletions(-) -- 2.20.1
