drm/amd/display: Test plane colorop pipeline update

[WHAT]
Add KUnit coverage for the colorop-pipeline path of
amdgpu_dm_update_plane_color_mgmt().

Test-local helpers fabricate a linked colorop pipeline so the update path
can be exercised end to end: a fully bypassed pipeline succeeds, a
pipeline missing the multiplier or the 3x4 op falls back to defaults, and
a pipeline with no 3D LUT hardware skips the 3D ops.

Assisted-by: Copilot:Claude-Opus-4.8 GPT-5.5
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions