drm_dp_tunne...et_old_state(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_dp_tunnel_atomic_get_old_state — from the Kernel API Manual, bestie ✨

Okay so picture this: you're deep in the kernel, in the Kernel API Manual, and you need the old atomic state for a tunnel. Not the new one. The old one. That's literally this function's whole personality, and it ate. 🎀

✨ NAME ✨

drm_dp_tunnel_atomic_get_old_state — get the old atomic state for a tunnel 💖

🌸 SYNOPSIS 🌸

struct drm_dp_tunnel_state * drm_dp_tunnel_atomic_get_old_state (struct
drm_atomic_commit *state , const struct drm_dp_tunnel *tunnel );

Like, yes, that signature is a whole paragraph. She's long but she's worth it. 🦋

🫶 ARGUMENTS 🫶

  • state — the atomic state, bestie. That's the one you're poking around in.
  • tunnel — the tunnel you want the state for. The main character of this whole operation, ngl.

👑 DESCRIPTION 👑

Get the old atomic state for tunnel. That's it, that's the vibe. 💅

It returns the old state, or NULL if the tunnel's atomic state is not in state. So if you get nothing back, don't come for her — the state just wasn't in there. Not me explaining the return value twice, but like, it's giving thorough. 😭

🔥 SEE ALSO 🔥

The kernel file lives right here, no cap:

  • ./drivers/gpu/drm/display/drm_dp_tunnel.c

And here's the whole tunnel friend group — every single one of them, because we don't do "and friends" around here:

And that's the whole page, periodt. 🌈 This icon was brought to you by the good people at ./drivers/gpu/drm/display, dated October 2026 — sending you all the tunnel-shaped love. 💜✨🎀

📦 where this page comes from