Save to file by below command and use tools to check it. However need to check how the raw data in VI pixel memory layout from the TRM.
v4l2-ctl --set-fmt-video=width=1920,height=1080,pixelformat=RG10 --set-ctrl bypass_mode=0 --stream-mmap --stream-count=1 --stream-to=ov1080.raw -d /dev/video0