New comment by CameronNemo on void-packages repository https://github.com/void-linux/void-packages/pull/41062#issuecomment-1435369460 Comment: >Of the many patches I linked to, only one of them mentions Alt-DP mode: “[This fixes USB 3.0 and Alt-DP modes in reverse plug orientation](https://github.com/SvenKiljan/archlinuxarm-pbp-packages/raw/main/linux-manjaro/4006-arm64-dts-rockchip-rk3399-pinebook-pro-Support-both-Type-C-plug-orientations.patch)”. Check the text/diff of the patches. If you see the string "extcon" or "altmode", it is altmode-DP related.