dm_set_vblank    3787 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 	return dm_set_vblank(crtc, true);
dm_set_vblank    3792 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 	dm_set_vblank(crtc, false);