[PATCH 14/15] ASoC: rockchip: i2s: Add support for 'rockchip, clk-trcm' property

[Sugar Zhang]

From: Xing Zheng <zhengxing at rock-chips.com>

If there is only one lrck (tx or rx) by hardware, we need to
use 'rockchip,clk-trcm' to specify which lrck can be used.

Change-Id: I3bf8d87a6bc8c45e183040012d87d8be21a4c133
Signed-off-by: Xing Zheng <zhengxing at rock-chips.com>
Signed-off-by: Sugar Zhang <sugar.zhang at rock-chips.com>
---
 sound/soc/rockchip/rockchip_i2s.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
index 6ccb62e..b9d9c88 100644
--- a/sound/soc/rockchip/rockchip_i2s.c
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -54,6 +54,7 @@ struct rk_i2s_dev {
 	bool is_master_mode;
 	const struct rk_i2s_pins *pins;
 	unsigned int bclk_ratio;
+	unsigned int clk_trcm;
 };
 
 /* tx/rx ctrl lock */
@@ -321,7 +322,6 @@ static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
 				  struct snd_soc_dai *dai)
 {
 	struct rk_i2s_dev *i2s = to_info(dai);
-	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	unsigned int val = 0;
 	unsigned int mclk_rate, bclk_rate, div_bclk, div_lrck;
 
@@ -421,13 +421,6 @@ static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
 	regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
 			   I2S_DMACR_RDL(16));
 
-	val = I2S_CKR_TRCM_TXRX;
-	if (dai->driver->symmetric_rate && rtd->dai_link->symmetric_rate)
-		val = I2S_CKR_TRCM_TXONLY;
-
-	regmap_update_bits(i2s->regmap, I2S_CKR,
-			   I2S_CKR_TRCM_MASK,
-			   val);
 	return 0;
 }
 
@@ -531,7 +524,6 @@ static struct snd_soc_dai_driver rockchip_i2s_dai = {
 			    SNDRV_PCM_FMTBIT_S32_LE),
 	},
 	.ops = &rockchip_i2s_dai_ops,
-	.symmetric_rate = 1,
 };
 
 static const struct snd_soc_component_driver rockchip_i2s_component = {
@@ -750,6 +742,18 @@ static int rockchip_i2s_probe(struct platform_device *pdev)
 	else if (of_property_read_bool(node, "rockchip,capture-only"))
 		soc_dai->playback.channels_min = 0;
 
+	i2s->clk_trcm = I2S_CKR_TRCM_TXRX;
+	if (!of_property_read_u32(node, "rockchip,clk-trcm", &val)) {
+		if (val >= 0 && val <= 2) {
+			i2s->clk_trcm = val << I2S_CKR_TRCM_SHIFT;
+			if (i2s->clk_trcm)
+				soc_dai->symmetric_rate = 1;
+		}
+	}
+
+	regmap_update_bits(i2s->regmap, I2S_CKR,
+			   I2S_CKR_TRCM_MASK, i2s->clk_trcm);
+
 	ret = devm_snd_soc_register_component(&pdev->dev,
 					      &rockchip_i2s_component,
 					      soc_dai, 1);
-- 
2.7.4