drm/amd/display: Test DSC precompute helpers

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[WHAT]
Add KUnit tests for log_dsc_params(), for
find_crtc_index_in_state_by_stream() with a matching and a missing
stream, and for is_dsc_precompute_needed() covering an empty state, a
stream without a link, a non MST link, an MST link whose CRTC is not
in the state and an MST link that needs the precompute pass.

[HOW]
Hand build a drm_atomic_commit with CRTC states and DC stream states so
the stream to CRTC lookup can be driven directly, and reuse it for a
table driven is_dsc_precompute_needed() test that varies the link
signal type and whether the CRTC is present.

Assisted-by: Copilot:Claude-Opus-5
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alex Hung 2026-08-30 01:05:31 -06:00 • committed by Alex Deucher

parent 85333609b1

commit 2ddbcae63e

3 changed files with 185 additions and 4 deletions

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11

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

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4

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

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174

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

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