dm_test_crc...ld_stop_dprx(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_crc_source_should_stop_dprx — NAME ✨

okay so welcome to the Kernel API Manual, bestie 🫶 — today's main character is dm_test_crc_source_should_stop_dprx, and her whole job is testing dm_crc_source_should_stop_dprx(). that's it, that's the assignment 💖

✨ SYNOPSIS ✨

void dm_test_crc_source_should_stop_dprx (struct kunit *test );

literally one function, zero drama, we love a minimal queen 👑

🎀 ARGUMENTS 🎀

  • test — the KUnit test context. that's the lil backstage pass she needs to do her thing 🎟️✨

🦋 DESCRIPTION 🦋

so here's the vibe check 🌈 — this test verifies that dm_crc_source_should_stop_dprx returns true only when the CRC is transitioning from a DPRX source to off. and "from a DPRX source" is doing a lot of work in that sentence, so let's spell it out: the condition is enabled && is_dprx(cur_crc_src) on the way in, and !enable on the way out. both. at the same time. no shortcuts 💅

and she returns false for everything else, which is honestly so real of her:

  • non-DPRX disables 🙅‍♀️
  • DPRX starts (that's the other function's job, not hers) 🚫
  • no-op transitions (nothing changed, nothing to stop, we're chillin') 😌

like, she's not out here saying "stop" to everything. she has standards. periodt 🔥

ngl this is a precision test — it's checking one specific edge of one specific transition, so if you're reading this because a test failed, congrats, you found the exact boundary she guards 👑

👑 SEE ALSO 👑

the source herself, if you wanna read ahead 📖:

Kernel file ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_crc_test.c

and her entire friend group — the whole CRC test squad, all iykyk 💜:

and that's the whole page, bestie 🍓 she lives in ./drivers/gpu/drm/amd/display/... and this lil doc was stamped October 2026 — go forth, run the test, slay 💅✨🌸

📦 where this page comes from