drm/amd/display: Add amdgpu_dm_crtc_late_register test

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why:
amdgpu_dm_crtc_late_register wires up the CRTC debugfs entries during
registration but had no coverage, leaving its single path untested.

how:
Expose amdgpu_dm_crtc_late_register for KUnit via STATIC_IFN_KUNIT and
EXPORT_IF_KUNIT (guarded by CONFIG_DEBUG_FS) and declare it in the KUnit
header block. Add dm_test_crtc_late_register_inits_debugfs, which gives
the CRTC a real debugfs parent, calls the callback, verifies it returns 0,
and tears down the debugfs directory.

Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Bhawanpreet Lakha 2026-07-23 16:37:01 -04:00 • committed by Alex Deucher

parent fa67092e46

commit 355aa2dbf0

3 changed files with 37 additions and 1 deletions

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3

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c

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3

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.h

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32

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

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