This patchset tries to take the UVC webcam gadget one step closer to being used with a real V4L2 video capture device (via a user-space application which is responsible for ensuring correct sequence of operations being performed on both UVC gadget and V4L2 capture device end). A major change introduced by this patchset is to port UVC webcam gadget to use videobuf2 framework for videobuffer managment and exposes USER_PTR IO method at the UVC gadget side to ensure "zero-copy" of video data as it passes from V4L2 capture driver domain to UVC gadget domain. (Thanks to Laurent Pinchart for suggesting this design change). I have tested this patchset on a super-speed compliant USB device controller, with the VIVI capture device acting as a dummy source of video data and I have modified the 'uvc-gadget' application written by Laurent (original application available here: http://git.ideasonboard.org/uvc-gadget.git) for testing the complete flow from V4L2 to UVC domain and vice versa. Bhupesh Sharma (5): usb: gadget/uvc: Fix string descriptor STALL issue when multiple uvc functions are added to a configuration usb: gadget/uvc: Use macro for interrupt endpoint status size instead of using a MAGIC number usb: gadget/uvc: Add super-speed support to UVC webcam gadget usb: gadget/uvc: Port UVC webcam gadget to use videobuf2 framework usb: gadget/uvc: Add support for 'USB_GADGET_DELAYED_STATUS' response for a set_intf(alt-set 1) command drivers/usb/gadget/Kconfig | 1 + drivers/usb/gadget/f_uvc.c | 304 +++++++++++++++++++---- drivers/usb/gadget/f_uvc.h | 8 +- drivers/usb/gadget/uvc.h | 7 +- drivers/usb/gadget/uvc_queue.c | 524 +++++++++++----------------------------- drivers/usb/gadget/uvc_queue.h | 25 +-- drivers/usb/gadget/uvc_v4l2.c | 73 ++++-- drivers/usb/gadget/uvc_video.c | 17 +- drivers/usb/gadget/webcam.c | 29 ++- 9 files changed, 509 insertions(+), 479 deletions(-) -- 1.7.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
