drm/amd/display: Test cascaded Panamera check

[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>

0 files changed, 0 insertions, 0 deletions