DRM_V3D_EXT_ID_MULTI_SYNC
bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
se->flags |= DRM_V3D_EXT_ID_MULTI_SYNC;
case DRM_V3D_EXT_ID_MULTI_SYNC: