drm/amd/display: Test DSC recompute check

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[WHAT]
Add KUnit tests for is_dsc_need_re_compute() covering a non MST branch,
a legacy hub without DSC support, a state with no stream on the link, a
mode change, an unchanged stream, a removed stream, a stream without a
connector and a connector without a CRTC.

[HOW]
Build a DC state carrying streams on the link under test together with
a matching drm_atomic_commit, then vary the topology, the connector to
CRTC mapping and the mode changed flag to select each path.

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 01:05:44 -06:00 • committed by Alex Deucher

parent 2ddbcae63e

commit 91b0c8fc50

3 changed files with 232 additions and 1 deletions

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3

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

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2

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

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228

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

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