[alsa-devel] [PATCH] ASoC: rt5514: Support the TDM docking mode

[Oder Chiou]

The TDM ducking mode can share the bus to other devices simultaneously.

Signed-off-by: Oder Chiou <oder_chiou at realtek.com>
---
 sound/soc/codecs/rt5514.c | 33 ++++++++++++++++++++++++++++++++-
 sound/soc/codecs/rt5514.h | 12 ++++++++++++
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5514.c b/sound/soc/codecs/rt5514.c
index 4ca73bf..a105c84 100644
--- a/sound/soc/codecs/rt5514.c
+++ b/sound/soc/codecs/rt5514.c
@@ -871,11 +871,38 @@ static int rt5514_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct rt5514_priv *rt5514 = snd_soc_codec_get_drvdata(codec);
-	unsigned int val = 0;
+	unsigned int val = 0, val2 = 0;
 
 	if (rx_mask || tx_mask)
 		val |= RT5514_TDM_MODE;
 
+	switch (tx_mask) {
+	case 0x3:
+		val2 |= RT5514_TDM_DOCKING_MODE | RT5514_TDM_DOCKING_VALID_CH2 |
+			RT5514_TDM_DOCKING_START_SLOT0;
+		break;
+
+	case 0x30:
+		val2 |= RT5514_TDM_DOCKING_MODE | RT5514_TDM_DOCKING_VALID_CH2 |
+			RT5514_TDM_DOCKING_START_SLOT4;
+		break;
+
+	case 0xf:
+		val2 |= RT5514_TDM_DOCKING_MODE | RT5514_TDM_DOCKING_VALID_CH4 |
+			RT5514_TDM_DOCKING_START_SLOT0;
+		break;
+
+	case 0xf0:
+		val2 |= RT5514_TDM_DOCKING_MODE | RT5514_TDM_DOCKING_VALID_CH4 |
+			RT5514_TDM_DOCKING_START_SLOT4;
+		break;
+
+	default:
+		break;
+	}
+
+
+
 	switch (slots) {
 	case 4:
 		val |= RT5514_TDMSLOT_SEL_RX_4CH | RT5514_TDMSLOT_SEL_TX_4CH;
@@ -921,6 +948,10 @@ static int rt5514_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 		RT5514_CH_LEN_RX_MASK | RT5514_CH_LEN_TX_MASK |
 		RT5514_TDM_MODE2, val);
 
+	regmap_update_bits(rt5514->regmap, RT5514_I2S_CTRL2,
+		RT5514_TDM_DOCKING_MODE | RT5514_TDM_DOCKING_VALID_CH_MASK |
+		RT5514_TDM_DOCKING_START_MASK, val2);
+
 	return 0;
 }
 
diff --git a/sound/soc/codecs/rt5514.h b/sound/soc/codecs/rt5514.h
index 02bc212..75024a4 100644
--- a/sound/soc/codecs/rt5514.h
+++ b/sound/soc/codecs/rt5514.h
@@ -164,6 +164,18 @@
 #define RT5514_I2S_DL_24			(0x2 << 0)
 #define RT5514_I2S_DL_8				(0x3 << 0)
 
+/* RT5514_I2S_CTRL2 (0x2014) */
+#define RT5514_TDM_DOCKING_MODE			(0x1 << 31)
+#define RT5514_TDM_DOCKING_MODE_SFT		31
+#define RT5514_TDM_DOCKING_VALID_CH_MASK	(0x1 << 29)
+#define RT5514_TDM_DOCKING_VALID_CH_SFT		29
+#define RT5514_TDM_DOCKING_VALID_CH2		(0x0 << 29)
+#define RT5514_TDM_DOCKING_VALID_CH4		(0x1 << 29)
+#define RT5514_TDM_DOCKING_START_MASK		(0x1 << 28)
+#define RT5514_TDM_DOCKING_START_SFT		28
+#define RT5514_TDM_DOCKING_START_SLOT0		(0x0 << 28)
+#define RT5514_TDM_DOCKING_START_SLOT4		(0x1 << 28)
+
 /* RT5514_DIG_SOURCE_CTRL (0x20a4) */
 #define RT5514_AD1_DMIC_INPUT_SEL		(0x1 << 1)
 #define RT5514_AD1_DMIC_INPUT_SEL_SFT		1
-- 
2.7.4