dm_test_mst...p_mgr_active(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

okay so bestie, this page is literally about dm_test_mst_stop_top_mgr_active — it's a KUnit test that checks what happens when MST gets stopped on a topology manager that's, like, actively doing stuff ✨ (we're in the Kernel API Manual btw, that's the vibe of this whole page 🎀).

🦋 SYNOPSIS 🦋

void dm_test_mst_stop_top_mgr_active (struct kunit *test );

like, that's the whole signature, no cap 💅

🌸 ARGUMENTS 🌸

  • test — the KUnit test context, aka the little main character struct that carries all the test's info around 🫶

✨ DESCRIPTION ✨

okay so here's the tea 🔥 — once mst_state is set, this helper literally calls

drm_dp_mst_topology_mgr_set_mst(false)

to turn MST off, and it clears the link lane count. and then? the helper always returns false. like, every single time. no exceptions. it's giving "my answer is no and it will never change" 💀 periodt.

👑 SEE ALSO 👑

bestie there are SO many siblings in this test family, i'm obsessed 😭 — here's the whole group chat, in order:

and that's the whole thing bestie 🧚💜 — sourced from ./drivers/gpu/drm/amd/display/..., dated October 2026, slay ⭐

📦 where this page comes from