drm/amd/display: Add KUnit tests for more crtc functions

Expand KUnit coverage for amdgpu_dm_crtc.c with tests for functions that
are easy to exercise in isolation:

- amdgpu_dm_crtc_set_static_screen_optimze(): the !allow_sr_entry early
  return.
- amdgpu_dm_crtc_enable_vblank(): rejection with -EINVAL when enabling
  vblank on an unconfigured CRTC.
- amdgpu_dm_crtc_update_crtc_active_planes(): the no-stream branch that
  resets active_planes to zero.
- amdgpu_dm_crtc_duplicate_state(): DM-specific fields are carried over.
- amdgpu_dm_crtc_reset_state(): a fresh state is allocated and installed.
- amdgpu_dm_crtc_destroy_state(): a stream-less state is freed cleanly.

Expose amdgpu_dm_crtc_destroy_state(), amdgpu_dm_crtc_duplicate_state(),
amdgpu_dm_crtc_reset_state() and amdgpu_dm_crtc_update_crtc_active_planes()
to the tests via STATIC_IFN_KUNIT/EXPORT_IF_KUNIT.

Assisted-by: Copilot:Claude-Opus-4.8
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Roman Li <roman.li@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