ALSA: ASoC: TLV320AIC3X: Modify only interface related bits in aic3x_set_dai_fmt

Those two serial data interface control register bits have also other
functions and they can be set before aic3x_set_dai_fmt is called.

Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 4 insertions, 2 deletions

diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 0c7452f932e7..29dc0ec3dd23 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -809,8 +809,10 @@ static int aic3x_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
 {
         struct snd_soc_codec *codec = codec_dai->codec;
         struct aic3x_priv *aic3x = codec->private_data;
-        u8 iface_areg = 0;
-        u8 iface_breg = 0;
+        u8 iface_areg, iface_breg;
+
+        iface_areg = aic3x_read_reg_cache(codec, AIC3X_ASD_INTF_CTRLA) & 0x3f;
+        iface_breg = aic3x_read_reg_cache(codec, AIC3X_ASD_INTF_CTRLB) & 0x3f;
 
         /* set master/slave audio interface */
         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {