drm/amd/display: Test cascaded Panamera check

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[WHAT]
Add KUnit tests for is_synaptics_cascaded_panamera() covering a
matching cascaded hub, a non Synaptics branch, a non Panamera device
ID, an unsupported branch firmware revision and a port without a
parent branch.

[HOW]
Allocate an MST topology manager with a branch and a port, and drive a
table driven test that fills in the branch OUI, device ID and firmware
revision for each case before checking the returned verdict.

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 01:04:38 -06:00 • committed by Alex Deucher

parent 46395b55cb

commit 4f168a2d76

3 changed files with 84 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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1

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

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81

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

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