komeda_scaler_validate
err = komeda_scaler_validate(conn, kcrtc_st, dflow);
err = komeda_scaler_validate(conn, kcrtc_st, &l_dflow);
err = komeda_scaler_validate(conn, kcrtc_st, &r_dflow);
err = komeda_scaler_validate(plane, kcrtc_st, dflow);