dm_test_crtc...q_vrr_pre_ai(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_crtc_high_irq_vrr_pre_ai — from the Kernel API Manual, bestie

okay so this is a page out of the Kernel API Manual and it's about one (1) very specific KUnit test. yes it's niche. no we're not skipping it. let's go 🎀

✨ NAME ✨

dm_test_crtc_high_irq_vrr_pre_ai — the test that checks the CRTC high IRQ VRR path on pre-AI ASIC. that's literally it, that's the whole vibe. 💫

🌸 SYNOPSIS 🌸

void dm_test_crtc_high_irq_vrr_pre_ai (struct kunit *test );

(it's void, it takes one arg, and yes that space before the closing paren is canon, don't touch it 🫶)

🦋 ARGUMENTS 🦋

  • test — the KUnit test context. that's the whole parameter list. one (1) bestie. iconic behavior honestly.

💖 DESCRIPTION 💖

so here's the setup: give this thing a matching CRTC, no writeback, and VRR active — which, and this matters, means the !vrr_active vblank handler gets skipped entirely, no cap — and then throw in a pre-AI family. with all of that in place, the handler runs straight through the CRC handling and then dips out and returns before it ever reaches the freesync section. 🏃‍♀️💨

like, it literally never gets to freesync. that's the test. that's the point. slay.

🔥 SEE ALSO 🔥

the kernel file this lives in, for the curious:

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

and now the full squad of sibling tests — every single one, we're not leaving anyone out, this is a group chat and everyone's in it 💜:

🧚 sign-off 🧚

and that's the whole page, bestie. 💜 it shipped out of the source tree at ./drivers/gpu/drm/amd/display/... and the date on this one is October 2026 — so yeah, we're reading from the future, and it's lowkey giving time traveler energy. ⭐ see you in the next one! 💖✨

📦 where this page comes from