diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index c2bd711e86e9..b1f8fc69023f 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -596,6 +596,10 @@ tda998x_configure_audio(struct drm_encoder *encoder,
 		cts_n = CTS_N_M(3) | CTS_N_K(3);
 		ca_i2s = CA_I2S_CA_I2S(0);
 		break;
+
+	default:
+		BUG();
+		return;
 	}
 
 	reg_write(encoder, REG_AIP_CLKSEL, clksel_aip);