dm_test_reg..._dmub_outbox(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 NAME 🎀

dm_test_register_hpd_handlers_dmub_outbox — Test DMUB outbox callbacks register

okay so this page is from the Kernel API Manual, and we're talking about dm_test_register_hpd_handlers_dmub_outbox(9). The header abbreviates the title as dm_test_reg..._dmub_outbox(9), but bestie, we're using the full name here. 💅

✨ SYNOPSIS ✨

void dm_test_register_hpd_handlers_dmub_outbox (struct kunit *test );

🫶 ARGUMENTS 🫶

  • test — The KUnit test context. That's the whole argument list, periodt.

💖 DESCRIPTION 💖

okay so this test does a very specific little glow-up: it enables DMUB outbox support so that dc_is_dmub_outbox_supported returns true, and that's what lets the dm_register_dmub_notify_callback block get exercised. Then it asserts that the HPD, HPD_IRQ, and HPD_SENSE_NOTIFY callbacks are registered. That's the vibe check, and no cap, those are the exact callback names. ✨

🌈 SEE ALSO 🌈

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

and all the other icons in this saga, in order:

that's the whole page, bestie — signed off from the Kernel API Manual, sourced from ./drivers/gpu/drm/amd/display/..., dated October 2026. 💖🦋

📦 where this page comes from