The UVC Gadget includes a hardcoded interrupt endpoint against the VideoControl interface, though it is misnamed as a control endpoint (the default endpoint 0 is actually used for that role). The UVC specification says that this is an optional feature of a UVC compliant camera provided certain scenarios don't hold true, specifically... 1. The device supports hardware triggers for still image capture 2. The device implements any AutoUpdate controls 3. The device implements any Asynchronous controls Those are all scenarios that will be determined by userspace, meaning that in some implementations the interrupt endpoint is unnecessary. This series adds the means to disable it, though retains the current behaviour as the default. Daniel Scally (3): usb: gadget: uvc: Rename uvc_control_ep usb: gadget: uvc: Add new disable_interrupt_ep attribute usb: gadget: uvc: Allow disabling of interrupt endpoint drivers/usb/gadget/function/f_uvc.c | 46 +++++++++++-------- drivers/usb/gadget/function/u_uvc.h | 2 + drivers/usb/gadget/function/uvc.h | 3 +- drivers/usb/gadget/function/uvc_configfs.c | 53 ++++++++++++++++++++++ 4 files changed, 85 insertions(+), 19 deletions(-) -- 2.34.1
