The second project is called macbook12-spi-driver, and it implements the possibility of the input driver for the keyboard, SPI trackpad, touchbar for MacBook Pro late 2016 and later.

Audio - driver for T2 audio interface, currently only audio output through MacBook's built-in speakers is supported.

VHCI is a USB virtual host controller a keyboard, mouse, and other system components are provided by this component (other drivers use this host controller to provide more functionality.

BCE (Buffer Copy Engine) - establishes the main channel of communication with T2.

The mbp2018-bridge-drv project is divided into 3 main components: The main driver for MacBook models 2018 and newer implements VHCI (operation of the touch / keyboard / etc.), as well as the functioning of sound. As time went on, and by the end of 2019, third-party developers implemented a number of drivers and kernel patches for interacting with the T2 chip. There was a lot of hype about the fact that due to the new T2 chip, it is impossible to install linux on the new 2018 MacBook with a touchbar.

Arch linux macbook retina