Does anyone know if an external clock source can be used to genlock the video display engine? I need to be able to know precisely when the first pixel of the first frame of a video appears. This would be a hardware-only implementation. My goal would be to synchronize the display clock (vpu clock?) with an fpga so that I can switch video input sources. That way when the fpga and the imx6 are in genlock, I can perform the switching cleanly. I haven't seen anything like this in the forums so far, I really just need to know if it is possible.