PIP mode on TV with one tuner is available only in hdmi mode and only TV source is allowed as PIP.
Task:
1. Enable PIP in TV mode (normally not available) - maybe one byte patch???
2. Set PIP function to show hdmi source (normally only TV source is possible)
Thanks for your effort

p.s. related: Enable PIP in MediaPlayer mode (Live TV as PIP source), maybe both patches could be done at once?