drm/tda998x: BUG() on invalid audio format

Suppress warning of unused-variables by adding a BUG()+return for invalid
audio-formats.

Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>

1 files changed, 4 insertions, 0 deletions

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);