diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 422d63d5fb75..dd183cee98b0 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -971,6 +971,8 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
 			div = 3;
 	}
 
+	mutex_lock(&priv->audio_mutex);
+
 	/* mute the audio FIFO: */
 	reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
 
@@ -1064,8 +1066,6 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
 	/* must be last register set: */
 	reg_write(priv, REG_TBG_CNTRL_0, 0);
 
-	mutex_lock(&priv->audio_mutex);
-
 	priv->tmds_clock = adjusted_mode->clock;
 
 	/* Only setup the info frames if the sink is HDMI */