Dolby vision disabled/greyed out on legit Xiaomi Box s 3 when connected to TV that supports it.
TV: Sharp 55GK4145K 4K Ultra HD 60Hz Frameless 55"
HDMI Cable: 8K HDMI V2.1 Cable 8K@60Hz, 4K@120Hz
First of all, the box was bought from the official store and I have triple checked, 99.99% sure it is not a fake.
TV absolutely supports Dolby vision and the strangest thing is I don't believe it supports HDR10+ (though it might just isn't listed anywhere on information about the TV)
I've already dug around, my best guess was the TV is a bit cheap and doesn't want to play nice with the box and accept DV through connected devices. Can't find anyone else having this issue though so just want to double check I'm not missing anything obvious.
Edit: SOLVED! needed to change the HDMI EDID version to 1.4 for dolby vision and only dolby vision. Have to change it back for regular hdr but its only a few clicks.