# ../drivers/gpu/drm/ast/ast_mode.c:851:18: note: (near initialization for 'ast_crtc_helper_funcs.atomic_flush')
DRM_AST n
# ../drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function 'amdgpu_dm_atomic_commit_tail':
# ../drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:7757:4: error: implicit declaration of function 'is_hdr_metadata_different' [-Werror=implicit-function-declaration]