This series improves the performance of the uvc video gadget by adding a zero copy routine using the scatter list interface of the gadget. The series also increases the amount of allocated requests depending of the speed and it also reduces the interrupt load by only trigger on every 16th request in case of super-speed. Michael Grzeschik (3): usb: gadget: uvc: make uvc_num_requests depend on gadget speed usb: gadget: uvc: add scatter gather support usb: gadget: uvc: decrease the interrupt load to a quarter drivers/usb/gadget/Kconfig | 1 + drivers/usb/gadget/function/f_uvc.c | 1 + drivers/usb/gadget/function/uvc.h | 15 ++- drivers/usb/gadget/function/uvc_queue.c | 30 ++++- drivers/usb/gadget/function/uvc_queue.h | 5 +- drivers/usb/gadget/function/uvc_video.c | 145 +++++++++++++++++++----- 6 files changed, 164 insertions(+), 33 deletions(-) -- 2.29.2
