[hdmkv]

HiMedia has never had a way to disable Imprex video processing, going back to previous gens. Only level of its application. Imprex, like with Darbee Darblet, VXP, etc., has been one of HiSilicon's SoC's key selling points, as applied moderately, improves PQ w/o unwanted artifacts like edge enhancement or an overly 'digital' looking picture.

If you want a completely unprocessed picture w/zero manipulation, HiMedia would have to add this functionality. For now, Imprex is applied to the native player, Kodi and whatever else video app you use.