Linux-libre 4.4-gnupck-4.4-gnu

1 files changed, 86 insertions, 37 deletions

diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
index ba34252b7..6e6a70c5c 100644
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -282,23 +282,25 @@ static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
 
 	config->sample_rate = params_rate(params);
 
-	if (dev->i2s_clk_cfg) {
-		ret = dev->i2s_clk_cfg(config);
-		if (ret < 0) {
-			dev_err(dev->dev, "runtime audio clk config fail\n");
-			return ret;
-		}
-	} else {
-		u32 bitclk = config->sample_rate * config->data_width * 2;
-
-		ret = clk_set_rate(dev->clk, bitclk);
-		if (ret) {
-			dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
-				ret);
-			return ret;
+	if (dev->capability & DW_I2S_MASTER) {
+		if (dev->i2s_clk_cfg) {
+			ret = dev->i2s_clk_cfg(config);
+			if (ret < 0) {
+				dev_err(dev->dev, "runtime audio clk config fail\n");
+				return ret;
+			}
+		} else {
+			u32 bitclk = config->sample_rate *
+					config->data_width * 2;
+
+			ret = clk_set_rate(dev->clk, bitclk);
+			if (ret) {
+				dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
+					ret);
+				return ret;
+			}
 		}
 	}
-
 	return 0;
 }
 
@@ -348,12 +350,43 @@ static int dw_i2s_trigger(struct snd_pcm_substream *substream,
 	return ret;
 }
 
+static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+	struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+	int ret = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		if (dev->capability & DW_I2S_SLAVE)
+			ret = 0;
+		else
+			ret = -EINVAL;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		if (dev->capability & DW_I2S_MASTER)
+			ret = 0;
+		else
+			ret = -EINVAL;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+	case SND_SOC_DAIFMT_CBS_CFM:
+		ret = -EINVAL;
+		break;
+	default:
+		dev_dbg(dev->dev, "dwc : Invalid master/slave format\n");
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
 static struct snd_soc_dai_ops dw_i2s_dai_ops = {
 	.startup	= dw_i2s_startup,
 	.shutdown	= dw_i2s_shutdown,
 	.hw_params	= dw_i2s_hw_params,
 	.prepare	= dw_i2s_prepare,
 	.trigger	= dw_i2s_trigger,
+	.set_fmt	= dw_i2s_set_fmt,
 };
 
 static const struct snd_soc_component_driver dw_i2s_component = {
@@ -366,7 +399,8 @@ static int dw_i2s_suspend(struct snd_soc_dai *dai)
 {
 	struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 
-	clk_disable(dev->clk);
+	if (dev->capability & DW_I2S_MASTER)
+		clk_disable(dev->clk);
 	return 0;
 }
 
@@ -374,7 +408,8 @@ static int dw_i2s_resume(struct snd_soc_dai *dai)
 {
 	struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 
-	clk_enable(dev->clk);
+	if (dev->capability & DW_I2S_MASTER)
+		clk_enable(dev->clk);
 	return 0;
 }
 
@@ -452,6 +487,14 @@ static int dw_configure_dai(struct dw_i2s_dev *dev,
 		dw_i2s_dai->capture.rates = rates;
 	}
 
+	if (COMP1_MODE_EN(comp1)) {
+		dev_dbg(dev->dev, "designware: i2s master mode supported\n");
+		dev->capability |= DW_I2S_MASTER;
+	} else {
+		dev_dbg(dev->dev, "designware: i2s slave mode supported\n");
+		dev->capability |= DW_I2S_SLAVE;
+	}
+
 	return 0;
 }
 
@@ -538,6 +581,7 @@ static int dw_i2s_probe(struct platform_device *pdev)
 	struct resource *res;
 	int ret;
 	struct snd_soc_dai_driver *dw_i2s_dai;
+	const char *clk_id;
 
 	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 	if (!dev) {
@@ -559,32 +603,35 @@ static int dw_i2s_probe(struct platform_device *pdev)
 		return PTR_ERR(dev->i2s_base);
 
 	dev->dev = &pdev->dev;
+
 	if (pdata) {
+		dev->capability = pdata->cap;
+		clk_id = NULL;
 		ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
-		if (ret < 0)
-			return ret;
+	} else {
+		clk_id = "i2sclk";
+		ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
+	}
+	if (ret < 0)
+		return ret;
 
-		dev->capability = pdata->cap;
-		dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
-		if (!dev->i2s_clk_cfg) {
-			dev_err(&pdev->dev, "no clock configure method\n");
-			return -ENODEV;
+	if (dev->capability & DW_I2S_MASTER) {
+		if (pdata) {
+			dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
+			if (!dev->i2s_clk_cfg) {
+				dev_err(&pdev->dev, "no clock configure method\n");
+				return -ENODEV;
+			}
 		}
+		dev->clk = devm_clk_get(&pdev->dev, clk_id);
 
-		dev->clk = devm_clk_get(&pdev->dev, NULL);
-	} else {
-		ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
+		if (IS_ERR(dev->clk))
+			return PTR_ERR(dev->clk);
+
+		ret = clk_prepare_enable(dev->clk);
 		if (ret < 0)
 			return ret;
-
-		dev->clk = devm_clk_get(&pdev->dev, "i2sclk");
 	}
-	if (IS_ERR(dev->clk))
-		return PTR_ERR(dev->clk);
-
-	ret = clk_prepare_enable(dev->clk);
-	if (ret < 0)
-		return ret;
 
 	dev_set_drvdata(&pdev->dev, dev);
 	ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component,
@@ -606,7 +653,8 @@ static int dw_i2s_probe(struct platform_device *pdev)
 	return 0;
 
 err_clk_disable:
-	clk_disable_unprepare(dev->clk);
+	if (dev->capability & DW_I2S_MASTER)
+		clk_disable_unprepare(dev->clk);
 	return ret;
 }
 
@@ -614,7 +662,8 @@ static int dw_i2s_remove(struct platform_device *pdev)
 {
 	struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
 
-	clk_disable_unprepare(dev->clk);
+	if (dev->capability & DW_I2S_MASTER)
+		clk_disable_unprepare(dev->clk);
 
 	return 0;
 }