[alsa-devel] [PATCH 1/1] ASoC: sirf: usp: Add bitclock inversion support

[Rongjun Ying]

Signed-off-by: Rongjun Ying <rongjun.ying at csr.com>
---
 sound/soc/sirf/sirf-usp.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sirf/sirf-usp.c b/sound/soc/sirf/sirf-usp.c
index 3a73037..186dc7f 100644
--- a/sound/soc/sirf/sirf-usp.c
+++ b/sound/soc/sirf/sirf-usp.c
@@ -100,6 +100,16 @@ static int sirf_usp_pcm_set_dai_fmt(struct snd_soc_dai *dai,
 		return -EINVAL;
 	}
 
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		usp->daifmt_format |= (fmt & SND_SOC_DAIFMT_INV_MASK);
+		break;
+	default:
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -177,7 +187,7 @@ static int sirf_usp_pcm_hw_params(struct snd_pcm_substream *substream,
 
 	shifter_len = data_len;
 
-	switch (usp->daifmt_format) {
+	switch (usp->daifmt_format & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
 		regmap_update_bits(usp->regmap, USP_RX_FRAME_CTRL,
 			USP_I2S_SYNC_CHG, USP_I2S_SYNC_CHG);
@@ -193,6 +203,18 @@ static int sirf_usp_pcm_hw_params(struct snd_pcm_substream *substream,
 		return -EINVAL;
 	}
 
+	switch (usp->daifmt_format & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		regmap_update_bits(usp->regmap, USP_MODE1,
+			USP_RXD_ACT_EDGE_FALLING | USP_TXD_ACT_EDGE_FALLING,
+			USP_RXD_ACT_EDGE_FALLING);
+		break;
+	default:
+		return -EINVAL;
+	}
+
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		regmap_update_bits(usp->regmap, USP_TX_FRAME_CTRL,
 			USP_TXC_DATA_LEN_MASK | USP_TXC_FRAME_LEN_MASK
-- 
2.0.4



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