ASoC: tlv320dac33: Safety check for codec slave mode

The currently available FIFO modes (mode1 and mode7) require master
mode from the codec.
Do not allow the slave configuration when the FIFO is in use.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index bc35f3ff8717..3ef3255cd1e7 100644
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -993,6 +993,7 @@ static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
                              unsigned int fmt)
 {
         struct snd_soc_codec *codec = codec_dai->codec;
+        struct tlv320dac33_priv *dac33 = codec->private_data;
         u8 aictrl_a, aictrl_b;
 
         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
@@ -1005,7 +1006,11 @@ static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
                 break;
         case SND_SOC_DAIFMT_CBS_CFS:
                 /* Codec Slave */
-                aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
+                if (dac33->fifo_mode) {
+                        dev_err(codec->dev, "FIFO mode requires master mode\n");
+                        return -EINVAL;
+                } else
+                        aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
                 break;
         default:
                 return -EINVAL;