Why does the provided demo_tb simulation fail to generate any output?
When attempting to simulate the Video Deinterlacer IP v4.0 with the demo test bench provided with the IP, the input to the Video Deinterlacer stays at "0" and no output is generated from the IP.
This is a known issue with the Deinterlacer v4.0 (Rev. 9) and later.
There are no plan to address this as the Video Deinterlacer is not recommended for new designs.
Users are recommended to use the Video Processing Subsystem's Deinterlacer configuration, (Xilinx Answer 65449).