[alsa-devel] [PATCH 3/6] ASoC: amd: add ACP3x TDM mode support

[Ravulapati Vishnu vardhan rao]

ACP3x I2S (CPU DAI) can act in normal I2S and TDM modes. Added support
for TDM mode. Desired mode can be selected from ASoC machine driver.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati at amd.com>
---
 sound/soc/amd/raven/acp3x-i2s.c | 28 ++++++++++++++++++++++------
 sound/soc/amd/raven/acp3x.h     |  1 +
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index 7f05782..0856e0c 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -43,7 +43,7 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai,
 		u32 tx_mask, u32 rx_mask, int slots, int slot_width)
 {
 	struct i2s_dev_data *adata;
-	u32 val, reg_val, frmt_val, frm_len;
+	u32 val, reg_val, frmt_reg, frm_len;
 	u16 slot_len;
 
 	adata = snd_soc_dai_get_drvdata(cpu_dai);
@@ -70,15 +70,31 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai,
 
 	frm_len = FRM_LEN | (slots << 15) | (slot_len << 18);
 	if (adata->substream_type == SNDRV_PCM_STREAM_PLAYBACK) {
-		reg_val = mmACP_BTTDM_ITER;
-		frmt_val = mmACP_BTTDM_TXFRMT;
+		switch (adata->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_val = mmACP_BTTDM_ITER;
+			frmt_reg = mmACP_BTTDM_TXFRMT;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = mmACP_I2STDM_ITER;
+			frmt_reg = mmACP_I2STDM_TXFRMT;
+		}
 	} else {
-		reg_val = mmACP_BTTDM_IRER;
-		frmt_val = mmACP_BTTDM_RXFRMT;
+		switch (adata->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_val = mmACP_BTTDM_IRER;
+			frmt_reg = mmACP_BTTDM_RXFRMT;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = mmACP_I2STDM_IRER;
+			frmt_reg = mmACP_I2STDM_RXFRMT;
+		}
 	}
 	val = rv_readl(adata->acp3x_base + reg_val);
 	rv_writel(val | 0x2, adata->acp3x_base + reg_val);
-	rv_writel(frm_len, adata->acp3x_base + frmt_val);
+	rv_writel(frm_len, adata->acp3x_base + frmt_reg);
 	adata->tdm_fmt = frm_len;
 	return 0;
 }
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index a1cdc4e..43213ae 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -78,6 +78,7 @@ struct acp3x_platform_info {
 struct i2s_dev_data {
 	bool tdm_mode;
 	unsigned int i2s_irq;
+	u16 i2s_instance;
 	u32 tdm_fmt;
 	u32 substream_type;
 	void __iomem *acp3x_base;
-- 
2.7.4