drm/amd/display: add CRC configure KUnit coverage

[WHAT]
Expose amdgpu_dm_crtc_configure_crc_source() for KUnit and add tests for
the CRTC-enable, disable (NONE), DPRX, DPRX-dither, DCN3.6 polynomial
select, and DC-configure-failure paths.

Introduce a small fake DC fixture (timing-generator and OPP callbacks
over an empty resource context) so the configure path can be exercised
without real hardware. The fixture is shared with the CRC IRQ tests.

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