[fritsch]

This is exactly what kodi does! but the world is not perfect, it does not control your TV (it can also be limited or full, with zero influence from us) and second - kodi does not control the GPU driver, which can influence this again.

TV: your job
GPU-driver: LibreELEC's job
kodi: Output full range if Use Limited not ticked, output limited range if use Limited is ticked <- done, implemented working.