[alsa-devel] [PATCH 3/3] ASoC: fsl_sai: Add support for Right-J mode

[Zidan Wang]

Add Right-J mode and set TCR5 FBT bit to let data right justify.

Signed-off-by: Zidan Wang <zidan.wang at freescale.com>
---
 sound/soc/fsl/fsl_sai.c | 14 +++++++++++---
 sound/soc/fsl/fsl_sai.h |  1 +
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index 4c5040d..19cd6f3 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -228,7 +228,11 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
 		sai->is_dsp_mode = true;
 		break;
 	case SND_SOC_DAIFMT_RIGHT_J:
-		/* To be done */
+		/* Frame high, one word length for frame sync */
+		val_cr2 |= FSL_SAI_CR2_BCP;
+		sai->is_right_j_mode = true;
+		break;
+
 	default:
 		return -EINVAL;
 	}
@@ -418,9 +422,13 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
 	val_cr5 |= FSL_SAI_CR5_WNW(sai->slot_width);
 	val_cr5 |= FSL_SAI_CR5_W0W(sai->slot_width);
 
-	if (sai->is_lsb_first)
+	if (sai->is_lsb_first && sai->is_right_j_mode)
 		val_cr5 |= FSL_SAI_CR5_FBT(0);
-	else
+	else if (sai->is_lsb_first && !sai->is_right_j_mode)
+		val_cr5 |= FSL_SAI_CR5_FBT(sai->slot_width - word_width);
+	else if (!sai->is_lsb_first && sai->is_right_j_mode)
+		val_cr5 |= FSL_SAI_CR5_FBT(sai->slot_width - 1);
+	else if (!sai->is_lsb_first && !sai->is_right_j_mode)
 		val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1);
 
 	val_cr4 |= FSL_SAI_CR4_FRSZ(sai->slots * channels);
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 111dfce..e220940 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -137,6 +137,7 @@ struct fsl_sai {
 	bool is_lsb_first;
 	bool is_slave_mode;
 	bool is_dsp_mode;
+	bool is_right_j_mode;
 	bool sai_on_imx;
 	bool synchronous[2];
 
-- 
1.9.1