Function connector_is_builtin 

pub fn connector_is_builtin(name: &str) -> bool

Whether a KMS connector name names a built-in panel: embedded DisplayPort, LVDS and MIPI-DSI are how laptops, tablets and phones wire their own screen. Anything else (HDMI, DP, USB-C alt-mode, virtual) is a display someone plugged in. A collision-qualified name such as card1/eDP-1 is judged by its connector part.