Aside: Imagine you’re driving down the road and you need to make a right turn. Well, for some reason the steering wheel is stowed away and disappeared! You need to hover your hand around the center console in a specific area to be able to expose it. Out comes the steering wheel and now you can make a right turn.
Google UX/UI team: Please fucking make the mute/unmute button visible at all times.
Every chip vendor I've dealt with, from Amlogic to Allwinner to Freescale, requires a signed NDA for full documentation. Public documentation is usually heavily redacted.
The GR8 seems to be a rebadged Allwinner chip, and the no-NDA datasheet seems to be next to useless, to be honest.