Currently VPE hardware is being controlled through the config node. Since it is converted into a V4L2 subdevice, we could control it directly from userspace by issuing open, close and ioctl system calls. The ACK from VPE hardware shall be routed directly to userspace by putting the ACK event on the v4l2 event queue. Change-Id: I7f82a750a28732382627349da362dbee8e27b149 Signed-off-by: Kiran Kumar H N <hurlisal@codeaurora.org>