dm_test_need_dp_aux(9)

✨ dm_test_need_dp_aux 💅

okay bestie, welcome to the dm_test_need_dp_aux(9) page from the Kernel API Manual 🫶 this is a tiny little unit test and honestly? she's iconic for it. no cap, we're gonna get you fluent in her whole vibe.

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🌸 NAME 🌸

dm_test_need_dp_aux — literally just a test for dm_need_dp_aux() 💖 that's the whole assignment, that's the gig.

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✨ SYNOPSIS ✨

void dm_test_need_dp_aux (struct kunit *test );

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🎀 ARGUMENTS 🎀

• test — the KUnit test context 🧚 that's the one thing she takes, and she takes it very seriously.

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💅 DESCRIPTION 💅

okay so here's what she actually verifies 👑 dm_need_dp_aux has to return true when the transition starts or stops a DPRX CRC source — because that's the case where you need the DP AUX handle, periodt. and it has to return false for non-DPRX transitions, like CRTC or NONE→NONE 🙈 no handle needed, we love a low-maintenance transition.

so: DPRX stuff → true. everything else → false. the vibe check is that simple ✨

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🦋 SEE ALSO 🦋

the kernel file herself, right here:

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

and her whole friend group 💜 go read them, they're all so good:

• dm_test_crtc_get_crc_sources(9)
• dm_test_crtc_verify_crc_source_valid(9)
• dm_test_crtc_verify_crc_source_invalid(9)
• dm_test_crtc_configure_crc_source_no_stream(9)
• dm_test_crtc_configure_crc_source_dprx(9)
• dm_test_crtc_configure_crc_source_dprx_dither(9)
• dm_test_crtc_configure_crc_source_crtc(9)
• dm_test_crtc_configure_crc_source_crtc_dcn36_poly(9)
• dm_test_crtc_configure_crc_source_crtc_configure_fails(9)
• dm_test_crtc_configure_crc_source_none(9)
• dm_test_crtc_set_crc_source_invalid(9)
• dm_test_crtc_set_crc_source_none_no_stream(9)
• dm_test_crtc_set_crc_source_none_commit(9)
• dm_test_crtc_set_crc_source_dprx_no_connector(9)
• dm_test_crtc_handle_crc_irq_early_returns(9)
• dm_test_crtc_handle_crc_irq_disabled_source(9)
• dm_test_crtc_handle_crc_irq_skips_initial_frames(9)
• dm_test_crtc_handle_crc_irq_dprx_after_skip(9)
• dm_test_crtc_handle_crc_irq_get_crc_fails(9)
• dm_test_crc_source_should_start_dprx(9)
• dm_test_crc_source_should_stop_dprx(9)

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okay that's the whole page, go be smart about it 🌈 this came from the source at ./drivers/gpu/drm/amd/display/..., dated October 2026, and it's the dm_test_need_dp_aux(9) page of the Kernel API Manual — love that for us, bye bestie 🎀💖