usb4_port_hotplug_enable(9)

📦 version 7.3.1, in nixpkgs unstable

💅 NAME

usb4_port_hotplug_enable — bestie, this one turns on hotplug for a port. That's the whole vibe. ✨

So this is a page from the Kernel API Manual (yes, the actual kernel docs, we're fancy now 🎀), and it's all about one lil' function that flips the "hey, something got plugged in!!" switch on a USB4 port. Let's get into it 🫶

✨ SYNOPSIS

int usb4_port_hotplug_enable (struct tb_port *port );

That's it. One arg, one int back. Iconic, minimal, no notes. 💅

🎀 ARGUMENTS

  • port — the USB4 port you're operating on. Like, this specific port right here — the one you're pointing at. 🫵 Lowkey the whole function revolves around this one.

🦋 DESCRIPTION

Okay so here's the tea ☕: usb4_port_hotplug_enable enables hot plug events on a given port — meaning the port gets to notice and announce when stuff gets plugged in or yanked out, live, no reboot, no drama. 🔥

But listen, bestie, this is not a "use it everywhere" situation. It's only intended to be used on lane, DP-IN, and DP-OUT adapters. That's the whole guest list. Don't be showing up at other adapter types with this function, it's giving invited-only event energy 🙈

🌸 RETURN

  • 0 on success — slay, it worked 💖
  • a negative errno otherwise — so like, if it didn't work, you get a negative errno. Not vibes, but at least it's honest 😭

👑 SEE ALSO

The literal Kernel file lives at ./drivers/thunderbolt/usb4.c — that's the source, go read it if you're feeling main character energy 🧚 And here is the entire friend group, every single one, no cap:

And that's the whole page, bestie 🫶 This one's from the kernel tree at ./drivers/thunderbolt, dated October 2026, filed under the Kernel API Manual as usb4_port_hotplug_enable(9). Go enable some hotplug. Slay. 💜✨

📦 where this page comes from