dm_mst_test_...around_rev12(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_mst_test_needs_dsc_aux_workaround_rev12(9) — the Kernel API Manual, section 9, bestie

okay so this page is literally about dm_mst_test_needs_dsc_aux_workaround_rev12, and yes the name is a whole paragraph, we don't gatekeep, we cope. it lives in the Kernel API Manual, section 9. she's giving very specific, very niche, very iconic 🎀

✨ SYNOPSIS ✨

void dm_mst_test_needs_dsc_aux_workaround_rev12 (struct kunit *test );

that's it. that's the whole signature. no return value, she's a void, she simply is 💅

🫶 ARGUMENTS 🫶

  • test — the KUnit test context. this is the little test-scenario envelope everything gets passed around in, and she's the main character of this function fr fr.

🌸 DESCRIPTION 🌸

so what does she actually do? okay so picture it: she's verifying that needs_dsc_aux_workaround returns true when the link has all three of these going on at once 👑

  • the specific branch device ID — yes the one, the specific one, no cap
  • DPCD rev 1.2 — exactly 1.2, not 1.1, not 1.3, we're not doing that today
  • sink count >= 2 — two or more sinks, bestie, that's the threshold

all three line up? then the workaround should trigger and this test is like "yep ✅". it's giving very much "trust but verify" energy 🦋

lowkey the whole point is the combination — the device ID AND rev 1.2 AND sink count >= 2, together, at the same time. that's the vibe check this test is running.

💜 SEE ALSO 💜

🧚 the kernel file (go read the source, iykyk)

  • ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_mst_types_test.c

👑 the sibling tests — her whole friend group, fr fr

forty-one of them. FORTY-ONE. she has a lot of friends and honestly? good for her 🍓

and that's the page!! 💖 huge shoutout to the source path ./drivers/gpu/drm/amd/display/... and to October 2026 for the date, this was dm_mst_test_needs_dsc_aux_workaround_rev12(9) signing off, slay, periodt, go run your KUnit tests bestie ✨🎀🦋

📦 where this page comes from