dm_test_crtc...ai_no_stream(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_crtc_high_irq_vrr_ai_no_stream — a Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual ✨ and today's main character is dm_test_crtc_high_irq_vrr_ai_no_stream, which — say it with me — is a real function that exists and we're gonna understand it. no cap. 🫶

🌸 NAME 🌸

dm_test_crtc_high_irq_vrr_ai_no_stream — literally just here to test the crtc high IRQ AI path, and there's no stream. that's the whole vibe. 💅

✨ SYNOPSIS ✨

void dm_test_crtc_high_irq_vrr_ai_no_stream (struct kunit *test );

one function, one arg, returns nothing. she's a void, she's booked and busy, she takes a struct kunit * and she serves. 💖

🎀 ARGUMENTS 🎀

  • test — the KUnit test context. yes bestie, that's the little bubble of test-world state that gets handed to every KUnit test. she just gets passed along, no drama. 🧚

🦋 DESCRIPTION 🦋

okay so here's the tea ☕ — on an AI+ family, the handler runs the post-CRC freesync section. iconic of it.

but in this particular scenario: there's no stream, and there's no pending flip. so BOTH of the inner blocks get skipped 👀 — like, they don't run, they're not invited to the function party.

instead, the handler just completes through the event-lock critical section — and the whole time, pflip_status stays completely untouched. not a single pixel of change. she simply walked past it and minded her business. 🙈

fr fr the takeaway: no stream + no pending flip = inner blocks skipped, handler finishes via event-lock critical section, pflip_status untouched. that's it, that's the test. 👑

🌈 SEE ALSO 🌈

Kernel file

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

and now the part where I introduce the entire extended friend group 😭 (all of them are (9) manual pages, obviously):

like. the whole squad. every single one. i counted, they're all there, i would never do you like that. 💀

👑 sign-off 👑

and that's the page bestie!! 🌸 source lives at ./drivers/gpu/drm/amd/display/... and the date on this beauty is October 2026, all wrapped up in the dm_test_crtc...ai_no_stream(9) page of the Kernel API Manual. go forth and test those IRQs, you absolute icon. 🦋💖✨

📦 where this page comes from