Linux-libre 4.6.2-gnu

8 files changed, 396 insertions, 179 deletions

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 3cc252e55..8ec9a074b 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -11,21 +11,24 @@ config SND_SOC_LPASS_CPU
 
 config SND_SOC_LPASS_PLATFORM
 	tristate
+	depends on HAS_DMA
 	select REGMAP_MMIO
 
 config SND_SOC_LPASS_IPQ806X
 	tristate
+	depends on HAS_DMA
 	select SND_SOC_LPASS_CPU
 	select SND_SOC_LPASS_PLATFORM
 
 config SND_SOC_LPASS_APQ8016
 	tristate
+	depends on HAS_DMA
 	select SND_SOC_LPASS_CPU
 	select SND_SOC_LPASS_PLATFORM
 
 config SND_SOC_STORM
 	tristate "ASoC I2S support for Storm boards"
-	depends on SND_SOC_QCOM
+	depends on SND_SOC_QCOM && HAS_DMA
 	select SND_SOC_LPASS_IPQ806X
 	select SND_SOC_MAX98357A
 	help
@@ -34,7 +37,7 @@ config SND_SOC_STORM
 
 config SND_SOC_APQ8016_SBC
 	tristate "SoC Audio support for APQ8016 SBC platforms"
-	depends on SND_SOC_QCOM
+	depends on SND_SOC_QCOM && HAS_DMA
 	select SND_SOC_LPASS_APQ8016
 	help
           Support for Qualcomm Technologies LPASS audio block in
diff --git a/sound/soc/qcom/apq8016_sbc.c b/sound/soc/qcom/apq8016_sbc.c
index 1efdf0088..1289543c8 100644
--- a/sound/soc/qcom/apq8016_sbc.c
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -30,6 +30,7 @@ struct apq8016_sbc_data {
 	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
 };
 
+#define MIC_CTRL_TER_WS_SLAVE_SEL	BIT(21)
 #define MIC_CTRL_QUA_WS_SLAVE_SEL_10	BIT(17)
 #define MIC_CTRL_TLMM_SCLK_EN		BIT(1)
 #define	SPKR_CTL_PRI_WS_SLAVE_SEL_11	(BIT(17) | BIT(16))
@@ -53,6 +54,12 @@ static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
 			MIC_CTRL_TLMM_SCLK_EN,
 			pdata->mic_iomux);
 		break;
+	case MI2S_TERTIARY:
+		writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL |
+			MIC_CTRL_TLMM_SCLK_EN,
+			pdata->mic_iomux);
+
+		break;
 
 	default:
 		dev_err(card->dev, "unsupported cpu dai configuration\n");
@@ -126,9 +133,6 @@ static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
 		}
 
 		link->platform_of_node = link->cpu_of_node;
-		/* For now we only support playback */
-		link->playback_only = true;
-
 		ret = of_property_read_string(np, "link-name", &link->name);
 		if (ret) {
 			dev_err(card->dev, "error getting codec dai_link name\n");
diff --git a/sound/soc/qcom/lpass-apq8016.c b/sound/soc/qcom/lpass-apq8016.c
index 94efc0102..3eef0c37b 100644
--- a/sound/soc/qcom/lpass-apq8016.c
+++ b/sound/soc/qcom/lpass-apq8016.c
@@ -133,23 +133,36 @@ static struct snd_soc_dai_driver apq8016_lpass_cpu_dai_driver[] = {
 	},
 };
 
-static int apq8016_lpass_alloc_dma_channel(struct lpass_data *drvdata)
+static int apq8016_lpass_alloc_dma_channel(struct lpass_data *drvdata,
+					   int direction)
 {
 	struct lpass_variant *v = drvdata->variant;
-	int chan = find_first_zero_bit(&drvdata->rdma_ch_bit_map,
+	int chan = 0;
+
+	if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+		chan = find_first_zero_bit(&drvdata->dma_ch_bit_map,
 					v->rdma_channels);
 
-	if (chan >= v->rdma_channels)
-		return -EBUSY;
+		if (chan >= v->rdma_channels)
+			return -EBUSY;
+	} else {
+		chan = find_next_zero_bit(&drvdata->dma_ch_bit_map,
+					v->wrdma_channel_start +
+					v->wrdma_channels,
+					v->wrdma_channel_start);
+
+		if (chan >=  v->wrdma_channel_start + v->wrdma_channels)
+			return -EBUSY;
+	}
 
-	set_bit(chan, &drvdata->rdma_ch_bit_map);
+	set_bit(chan, &drvdata->dma_ch_bit_map);
 
 	return chan;
 }
 
 static int apq8016_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
 {
-	clear_bit(chan, &drvdata->rdma_ch_bit_map);
+	clear_bit(chan, &drvdata->dma_ch_bit_map);
 
 	return 0;
 }
@@ -212,7 +225,11 @@ static struct lpass_variant apq8016_data = {
 	.rdma_reg_base		= 0x8400,
 	.rdma_reg_stride	= 0x1000,
 	.rdma_channels		= 2,
-	.rdmactl_audif_start	= 1,
+	.dmactl_audif_start	= 1,
+	.wrdma_reg_base		= 0xB000,
+	.wrdma_reg_stride	= 0x1000,
+	.wrdma_channel_start	= 5,
+	.wrdma_channels		= 2,
 	.dai_driver		= apq8016_lpass_cpu_dai_driver,
 	.num_dai		= ARRAY_SIZE(apq8016_lpass_cpu_dai_driver),
 	.init			= apq8016_lpass_init,
diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index e5101e0d2..3cde9fb97 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -120,31 +120,60 @@ static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
 		return -EINVAL;
 	}
 
-	switch (channels) {
-	case 1:
-		regval |= LPAIF_I2SCTL_SPKMODE_SD0;
-		regval |= LPAIF_I2SCTL_SPKMONO_MONO;
-		break;
-	case 2:
-		regval |= LPAIF_I2SCTL_SPKMODE_SD0;
-		regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
-		break;
-	case 4:
-		regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
-		regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
-		break;
-	case 6:
-		regval |= LPAIF_I2SCTL_SPKMODE_6CH;
-		regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
-		break;
-	case 8:
-		regval |= LPAIF_I2SCTL_SPKMODE_8CH;
-		regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
-		break;
-	default:
-		dev_err(dai->dev, "%s() invalid channels given: %u\n",
-				__func__, channels);
-		return -EINVAL;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		switch (channels) {
+		case 1:
+			regval |= LPAIF_I2SCTL_SPKMODE_SD0;
+			regval |= LPAIF_I2SCTL_SPKMONO_MONO;
+			break;
+		case 2:
+			regval |= LPAIF_I2SCTL_SPKMODE_SD0;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		case 4:
+			regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		case 6:
+			regval |= LPAIF_I2SCTL_SPKMODE_6CH;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		case 8:
+			regval |= LPAIF_I2SCTL_SPKMODE_8CH;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		default:
+			dev_err(dai->dev, "%s() invalid channels given: %u\n",
+					__func__, channels);
+			return -EINVAL;
+		}
+	} else {
+		switch (channels) {
+		case 1:
+			regval |= LPAIF_I2SCTL_MICMODE_SD0;
+			regval |= LPAIF_I2SCTL_MICMONO_MONO;
+			break;
+		case 2:
+			regval |= LPAIF_I2SCTL_MICMODE_SD0;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		case 4:
+			regval |= LPAIF_I2SCTL_MICMODE_QUAD01;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		case 6:
+			regval |= LPAIF_I2SCTL_MICMODE_6CH;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		case 8:
+			regval |= LPAIF_I2SCTL_MICMODE_8CH;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		default:
+			dev_err(dai->dev, "%s() invalid channels given: %u\n",
+					__func__, channels);
+			return -EINVAL;
+		}
 	}
 
 	ret = regmap_write(drvdata->lpaif_map,
@@ -188,10 +217,19 @@ static int lpass_cpu_daiops_prepare(struct snd_pcm_substream *substream,
 {
 	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 	int ret;
+	unsigned int val, mask;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		val = LPAIF_I2SCTL_SPKEN_ENABLE;
+		mask = LPAIF_I2SCTL_SPKEN_MASK;
+	} else  {
+		val = LPAIF_I2SCTL_MICEN_ENABLE;
+		mask = LPAIF_I2SCTL_MICEN_MASK;
+	}
 
 	ret = regmap_update_bits(drvdata->lpaif_map,
 			LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
-			LPAIF_I2SCTL_SPKEN_MASK, LPAIF_I2SCTL_SPKEN_ENABLE);
+			mask, val);
 	if (ret)
 		dev_err(dai->dev, "%s() error writing to i2sctl reg: %d\n",
 				__func__, ret);
@@ -204,16 +242,24 @@ static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
 {
 	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 	int ret = -EINVAL;
+	unsigned int val, mask;
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			val = LPAIF_I2SCTL_SPKEN_ENABLE;
+			mask = LPAIF_I2SCTL_SPKEN_MASK;
+		} else  {
+			val = LPAIF_I2SCTL_MICEN_ENABLE;
+			mask = LPAIF_I2SCTL_MICEN_MASK;
+		}
+
 		ret = regmap_update_bits(drvdata->lpaif_map,
 				LPAIF_I2SCTL_REG(drvdata->variant,
 						dai->driver->id),
-				LPAIF_I2SCTL_SPKEN_MASK,
-				LPAIF_I2SCTL_SPKEN_ENABLE);
+				mask, val);
 		if (ret)
 			dev_err(dai->dev, "%s() error writing to i2sctl reg: %d\n",
 					__func__, ret);
@@ -221,11 +267,18 @@ static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			val = LPAIF_I2SCTL_SPKEN_DISABLE;
+			mask = LPAIF_I2SCTL_SPKEN_MASK;
+		} else  {
+			val = LPAIF_I2SCTL_MICEN_DISABLE;
+			mask = LPAIF_I2SCTL_MICEN_MASK;
+		}
+
 		ret = regmap_update_bits(drvdata->lpaif_map,
 				LPAIF_I2SCTL_REG(drvdata->variant,
 						dai->driver->id),
-				LPAIF_I2SCTL_SPKEN_MASK,
-				LPAIF_I2SCTL_SPKEN_DISABLE);
+				mask, val);
 		if (ret)
 			dev_err(dai->dev, "%s() error writing to i2sctl reg: %d\n",
 					__func__, ret);
@@ -294,6 +347,17 @@ static bool lpass_cpu_regmap_writeable(struct device *dev, unsigned int reg)
 			return true;
 	}
 
+	for (i = 0; i < v->wrdma_channels; ++i) {
+		if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
+			return true;
+	}
+
 	return false;
 }
 
@@ -327,6 +391,19 @@ static bool lpass_cpu_regmap_readable(struct device *dev, unsigned int reg)
 			return true;
 	}
 
+	for (i = 0; i < v->wrdma_channels; ++i) {
+		if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
+			return true;
+	}
+
 	return false;
 }
 
@@ -344,6 +421,10 @@ static bool lpass_cpu_regmap_volatile(struct device *dev, unsigned int reg)
 		if (reg == LPAIF_RDMACURR_REG(v, i))
 			return true;
 
+	for (i = 0; i < v->wrdma_channels; ++i)
+		if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
+			return true;
+
 	return false;
 }
 
@@ -398,8 +479,9 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 		return PTR_ERR((void const __force *)drvdata->lpaif);
 	}
 
-	lpass_cpu_regmap_config.max_register = LPAIF_RDMAPER_REG(variant,
-						variant->rdma_channels);
+	lpass_cpu_regmap_config.max_register = LPAIF_WRDMAPER_REG(variant,
+						variant->wrdma_channels +
+						variant->wrdma_channel_start);
 
 	drvdata->lpaif_map = devm_regmap_init_mmio(&pdev->dev, drvdata->lpaif,
 			&lpass_cpu_regmap_config);
diff --git a/sound/soc/qcom/lpass-ipq806x.c b/sound/soc/qcom/lpass-ipq806x.c
index 7a4167952..608c1a92a 100644
--- a/sound/soc/qcom/lpass-ipq806x.c
+++ b/sound/soc/qcom/lpass-ipq806x.c
@@ -63,9 +63,12 @@ static struct snd_soc_dai_driver ipq806x_lpass_cpu_dai_driver = {
 	.ops    = &asoc_qcom_lpass_cpu_dai_ops,
 };
 
-static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata)
+static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir)
 {
-	return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
+	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
+		return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
+	else	/* Capture currently not implemented */
+		return -EINVAL;
 }
 
 static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
@@ -83,6 +86,10 @@ static struct lpass_variant ipq806x_data = {
 	.rdma_reg_base		= 0x6000,
 	.rdma_reg_stride	= 0x1000,
 	.rdma_channels		= 4,
+	.wrdma_reg_base		= 0xB000,
+	.wrdma_reg_stride	= 0x1000,
+	.wrdma_channel_start	= 5,
+	.wrdma_channels		= 4,
 	.dai_driver		= &ipq806x_lpass_cpu_dai_driver,
 	.num_dai		= 1,
 	.alloc_dma_channel	= ipq806x_lpass_alloc_dma_channel,
diff --git a/sound/soc/qcom/lpass-lpaif-reg.h b/sound/soc/qcom/lpass-lpaif-reg.h
index 95e22f131..2240bc68e 100644
--- a/sound/soc/qcom/lpass-lpaif-reg.h
+++ b/sound/soc/qcom/lpass-lpaif-reg.h
@@ -47,6 +47,28 @@
 #define LPAIF_I2SCTL_SPKMONO_STEREO	(0 << LPAIF_I2SCTL_SPKMONO_SHIFT)
 #define LPAIF_I2SCTL_SPKMONO_MONO	(1 << LPAIF_I2SCTL_SPKMONO_SHIFT)
 
+#define LPAIF_I2SCTL_MICEN_MASK		GENMASK(8, 8)
+#define LPAIF_I2SCTL_MICEN_SHIFT	8
+#define LPAIF_I2SCTL_MICEN_DISABLE	(0 << LPAIF_I2SCTL_MICEN_SHIFT)
+#define LPAIF_I2SCTL_MICEN_ENABLE	(1 << LPAIF_I2SCTL_MICEN_SHIFT)
+
+#define LPAIF_I2SCTL_MICMODE_MASK	GENMASK(7, 4)
+#define LPAIF_I2SCTL_MICMODE_SHIFT	4
+#define LPAIF_I2SCTL_MICMODE_NONE	(0 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_SD0	(1 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_SD1	(2 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_SD2	(3 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_SD3	(4 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_QUAD01	(5 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_QUAD23	(6 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_6CH	(7 << LPAIF_I2SCTL_MICMODE_SHIFT)
+#define LPAIF_I2SCTL_MICMODE_8CH	(8 << LPAIF_I2SCTL_MICMODE_SHIFT)
+
+#define LPAIF_I2SCTL_MIMONO_MASK	GENMASK(3, 3)
+#define LPAIF_I2SCTL_MICMONO_SHIFT	3
+#define LPAIF_I2SCTL_MICMONO_STEREO	(0 << LPAIF_I2SCTL_MICMONO_SHIFT)
+#define LPAIF_I2SCTL_MICMONO_MONO	(1 << LPAIF_I2SCTL_MICMONO_SHIFT)
+
 #define LPAIF_I2SCTL_WSSRC_MASK		0x0004
 #define LPAIF_I2SCTL_WSSRC_SHIFT	2
 #define LPAIF_I2SCTL_WSSRC_INTERNAL	(0 << LPAIF_I2SCTL_WSSRC_SHIFT)
@@ -90,37 +112,65 @@
 #define	LPAIF_RDMAPER_REG(v, chan)	LPAIF_RDMA_REG_ADDR(v, 0x10, (chan))
 #define	LPAIF_RDMAPERCNT_REG(v, chan)	LPAIF_RDMA_REG_ADDR(v, 0x14, (chan))
 
-#define LPAIF_RDMACTL_BURSTEN_MASK	0x800
-#define LPAIF_RDMACTL_BURSTEN_SHIFT	11
-#define LPAIF_RDMACTL_BURSTEN_SINGLE	(0 << LPAIF_RDMACTL_BURSTEN_SHIFT)
-#define LPAIF_RDMACTL_BURSTEN_INCR4	(1 << LPAIF_RDMACTL_BURSTEN_SHIFT)
-
-#define LPAIF_RDMACTL_WPSCNT_MASK	0x700
-#define LPAIF_RDMACTL_WPSCNT_SHIFT	8
-#define LPAIF_RDMACTL_WPSCNT_ONE	(0 << LPAIF_RDMACTL_WPSCNT_SHIFT)
-#define LPAIF_RDMACTL_WPSCNT_TWO	(1 << LPAIF_RDMACTL_WPSCNT_SHIFT)
-#define LPAIF_RDMACTL_WPSCNT_THREE	(2 << LPAIF_RDMACTL_WPSCNT_SHIFT)
-#define LPAIF_RDMACTL_WPSCNT_FOUR	(3 << LPAIF_RDMACTL_WPSCNT_SHIFT)
-#define LPAIF_RDMACTL_WPSCNT_SIX	(5 << LPAIF_RDMACTL_WPSCNT_SHIFT)
-#define LPAIF_RDMACTL_WPSCNT_EIGHT	(7 << LPAIF_RDMACTL_WPSCNT_SHIFT)
-
-#define LPAIF_RDMACTL_AUDINTF_MASK	0x0F0
-#define LPAIF_RDMACTL_AUDINTF_SHIFT	4
-
-#define LPAIF_RDMACTL_FIFOWM_MASK	0x00E
-#define LPAIF_RDMACTL_FIFOWM_SHIFT	1
-#define LPAIF_RDMACTL_FIFOWM_1		(0 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-#define LPAIF_RDMACTL_FIFOWM_2		(1 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-#define LPAIF_RDMACTL_FIFOWM_3		(2 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-#define LPAIF_RDMACTL_FIFOWM_4		(3 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-#define LPAIF_RDMACTL_FIFOWM_5		(4 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-#define LPAIF_RDMACTL_FIFOWM_6		(5 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-#define LPAIF_RDMACTL_FIFOWM_7		(6 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-#define LPAIF_RDMACTL_FIFOWM_8		(7 << LPAIF_RDMACTL_FIFOWM_SHIFT)
-
-#define LPAIF_RDMACTL_ENABLE_MASK	0x1
-#define LPAIF_RDMACTL_ENABLE_SHIFT	0
-#define LPAIF_RDMACTL_ENABLE_OFF	(0 << LPAIF_RDMACTL_ENABLE_SHIFT)
-#define LPAIF_RDMACTL_ENABLE_ON		(1 << LPAIF_RDMACTL_ENABLE_SHIFT)
-
+#define LPAIF_WRDMA_REG_ADDR(v, addr, chan) \
+	(v->wrdma_reg_base + (addr) + \
+	 v->wrdma_reg_stride * (chan - v->wrdma_channel_start))
+
+#define LPAIF_WRDMACTL_REG(v, chan)	LPAIF_WRDMA_REG_ADDR(v, 0x00, (chan))
+#define LPAIF_WRDMABASE_REG(v, chan)	LPAIF_WRDMA_REG_ADDR(v, 0x04, (chan))
+#define	LPAIF_WRDMABUFF_REG(v, chan)	LPAIF_WRDMA_REG_ADDR(v, 0x08, (chan))
+#define LPAIF_WRDMACURR_REG(v, chan)	LPAIF_WRDMA_REG_ADDR(v, 0x0C, (chan))
+#define	LPAIF_WRDMAPER_REG(v, chan)	LPAIF_WRDMA_REG_ADDR(v, 0x10, (chan))
+#define	LPAIF_WRDMAPERCNT_REG(v, chan)	LPAIF_WRDMA_REG_ADDR(v, 0x14, (chan))
+
+#define __LPAIF_DMA_REG(v, chan, dir, reg)  \
+	(dir ==  SNDRV_PCM_STREAM_PLAYBACK) ? \
+		LPAIF_RDMA##reg##_REG(v, chan) : \
+		LPAIF_WRDMA##reg##_REG(v, chan)
+
+#define LPAIF_DMACTL_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, CTL)
+#define LPAIF_DMABASE_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, BASE)
+#define	LPAIF_DMABUFF_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, BUFF)
+#define LPAIF_DMACURR_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, CURR)
+#define	LPAIF_DMAPER_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, PER)
+#define	LPAIF_DMAPERCNT_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, PERCNT)
+
+#define LPAIF_DMACTL_BURSTEN_MASK	0x800
+#define LPAIF_DMACTL_BURSTEN_SHIFT	11
+#define LPAIF_DMACTL_BURSTEN_SINGLE	(0 << LPAIF_DMACTL_BURSTEN_SHIFT)
+#define LPAIF_DMACTL_BURSTEN_INCR4	(1 << LPAIF_DMACTL_BURSTEN_SHIFT)
+
+#define LPAIF_DMACTL_WPSCNT_MASK	0x700
+#define LPAIF_DMACTL_WPSCNT_SHIFT	8
+#define LPAIF_DMACTL_WPSCNT_ONE	(0 << LPAIF_DMACTL_WPSCNT_SHIFT)
+#define LPAIF_DMACTL_WPSCNT_TWO	(1 << LPAIF_DMACTL_WPSCNT_SHIFT)
+#define LPAIF_DMACTL_WPSCNT_THREE	(2 << LPAIF_DMACTL_WPSCNT_SHIFT)
+#define LPAIF_DMACTL_WPSCNT_FOUR	(3 << LPAIF_DMACTL_WPSCNT_SHIFT)
+#define LPAIF_DMACTL_WPSCNT_SIX	(5 << LPAIF_DMACTL_WPSCNT_SHIFT)
+#define LPAIF_DMACTL_WPSCNT_EIGHT	(7 << LPAIF_DMACTL_WPSCNT_SHIFT)
+
+#define LPAIF_DMACTL_AUDINTF_MASK	0x0F0
+#define LPAIF_DMACTL_AUDINTF_SHIFT	4
+#define LPAIF_DMACTL_AUDINTF(id)	(id << LPAIF_DMACTL_AUDINTF_SHIFT)
+
+#define LPAIF_DMACTL_FIFOWM_MASK	0x00E
+#define LPAIF_DMACTL_FIFOWM_SHIFT	1
+#define LPAIF_DMACTL_FIFOWM_1		(0 << LPAIF_DMACTL_FIFOWM_SHIFT)
+#define LPAIF_DMACTL_FIFOWM_2		(1 << LPAIF_DMACTL_FIFOWM_SHIFT)
+#define LPAIF_DMACTL_FIFOWM_3		(2 << LPAIF_DMACTL_FIFOWM_SHIFT)
+#define LPAIF_DMACTL_FIFOWM_4		(3 << LPAIF_DMACTL_FIFOWM_SHIFT)
+#define LPAIF_DMACTL_FIFOWM_5		(4 << LPAIF_DMACTL_FIFOWM_SHIFT)
+#define LPAIF_DMACTL_FIFOWM_6		(5 << LPAIF_DMACTL_FIFOWM_SHIFT)
+#define LPAIF_DMACTL_FIFOWM_7		(6 << LPAIF_DMACTL_FIFOWM_SHIFT)
+#define LPAIF_DMACTL_FIFOWM_8		(7 << LPAIF_DMACTL_FIFOWM_SHIFT)
+
+#define LPAIF_DMACTL_ENABLE_MASK	0x1
+#define LPAIF_DMACTL_ENABLE_SHIFT	0
+#define LPAIF_DMACTL_ENABLE_OFF	(0 << LPAIF_DMACTL_ENABLE_SHIFT)
+#define LPAIF_DMACTL_ENABLE_ON		(1 << LPAIF_DMACTL_ENABLE_SHIFT)
+
+#define LPAIF_DMACTL_DYNCLK_MASK	BIT(12)
+#define LPAIF_DMACTL_DYNCLK_SHIFT	12
+#define LPAIF_DMACTL_DYNCLK_OFF	(0 << LPAIF_DMACTL_DYNCLK_SHIFT)
+#define LPAIF_DMACTL_DYNCLK_ON		(1 << LPAIF_DMACTL_DYNCLK_SHIFT)
 #endif /* __LPASS_LPAIF_REG_H__ */
diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
index 4aeb8e1a7..6e8665430 100644
--- a/sound/soc/qcom/lpass-platform.c
+++ b/sound/soc/qcom/lpass-platform.c
@@ -26,6 +26,7 @@
 
 struct lpass_pcm_data {
 	int rdma_ch;
+	int wrdma_ch;
 	int i2s_port;
 };
 
@@ -90,8 +91,14 @@ static int lpass_platform_pcmops_hw_params(struct snd_pcm_substream *substream,
 	snd_pcm_format_t format = params_format(params);
 	unsigned int channels = params_channels(params);
 	unsigned int regval;
+	int ch, dir = substream->stream;
 	int bitwidth;
-	int ret, rdma_port = pcm_data->i2s_port + v->rdmactl_audif_start;
+	int ret, dma_port = pcm_data->i2s_port + v->dmactl_audif_start;
+
+	if (dir ==  SNDRV_PCM_STREAM_PLAYBACK)
+		ch = pcm_data->rdma_ch;
+	else
+		ch = pcm_data->wrdma_ch;
 
 	bitwidth = snd_pcm_format_width(format);
 	if (bitwidth < 0) {
@@ -100,25 +107,25 @@ static int lpass_platform_pcmops_hw_params(struct snd_pcm_substream *substream,
 		return bitwidth;
 	}
 
-	regval = LPAIF_RDMACTL_BURSTEN_INCR4 |
-			LPAIF_RDMACTL_AUDINTF(rdma_port) |
-			LPAIF_RDMACTL_FIFOWM_8;
+	regval = LPAIF_DMACTL_BURSTEN_INCR4 |
+			LPAIF_DMACTL_AUDINTF(dma_port) |
+			LPAIF_DMACTL_FIFOWM_8;
 
 	switch (bitwidth) {
 	case 16:
 		switch (channels) {
 		case 1:
 		case 2:
-			regval |= LPAIF_RDMACTL_WPSCNT_ONE;
+			regval |= LPAIF_DMACTL_WPSCNT_ONE;
 			break;
 		case 4:
-			regval |= LPAIF_RDMACTL_WPSCNT_TWO;
+			regval |= LPAIF_DMACTL_WPSCNT_TWO;
 			break;
 		case 6:
-			regval |= LPAIF_RDMACTL_WPSCNT_THREE;
+			regval |= LPAIF_DMACTL_WPSCNT_THREE;
 			break;
 		case 8:
-			regval |= LPAIF_RDMACTL_WPSCNT_FOUR;
+			regval |= LPAIF_DMACTL_WPSCNT_FOUR;
 			break;
 		default:
 			dev_err(soc_runtime->dev, "%s() invalid PCM config given: bw=%d, ch=%u\n",
@@ -130,19 +137,19 @@ static int lpass_platform_pcmops_hw_params(struct snd_pcm_substream *substream,
 	case 32:
 		switch (channels) {
 		case 1:
-			regval |= LPAIF_RDMACTL_WPSCNT_ONE;
+			regval |= LPAIF_DMACTL_WPSCNT_ONE;
 			break;
 		case 2:
-			regval |= LPAIF_RDMACTL_WPSCNT_TWO;
+			regval |= LPAIF_DMACTL_WPSCNT_TWO;
 			break;
 		case 4:
-			regval |= LPAIF_RDMACTL_WPSCNT_FOUR;
+			regval |= LPAIF_DMACTL_WPSCNT_FOUR;
 			break;
 		case 6:
-			regval |= LPAIF_RDMACTL_WPSCNT_SIX;
+			regval |= LPAIF_DMACTL_WPSCNT_SIX;
 			break;
 		case 8:
-			regval |= LPAIF_RDMACTL_WPSCNT_EIGHT;
+			regval |= LPAIF_DMACTL_WPSCNT_EIGHT;
 			break;
 		default:
 			dev_err(soc_runtime->dev, "%s() invalid PCM config given: bw=%d, ch=%u\n",
@@ -157,7 +164,7 @@ static int lpass_platform_pcmops_hw_params(struct snd_pcm_substream *substream,
 	}
 
 	ret = regmap_write(drvdata->lpaif_map,
-			LPAIF_RDMACTL_REG(v, pcm_data->rdma_ch), regval);
+			LPAIF_DMACTL_REG(v, ch, dir), regval);
 	if (ret) {
 		dev_err(soc_runtime->dev, "%s() error writing to rdmactl reg: %d\n",
 				__func__, ret);
@@ -174,10 +181,15 @@ static int lpass_platform_pcmops_hw_free(struct snd_pcm_substream *substream)
 	struct lpass_data *drvdata =
 		snd_soc_platform_get_drvdata(soc_runtime->platform);
 	struct lpass_variant *v = drvdata->variant;
+	unsigned int reg;
 	int ret;
 
-	ret = regmap_write(drvdata->lpaif_map,
-			LPAIF_RDMACTL_REG(v, pcm_data->rdma_ch), 0);
+	if (substream->stream ==  SNDRV_PCM_STREAM_PLAYBACK)
+		reg = LPAIF_RDMACTL_REG(v, pcm_data->rdma_ch);
+	else
+		reg = LPAIF_WRDMACTL_REG(v, pcm_data->wrdma_ch);
+
+	ret = regmap_write(drvdata->lpaif_map, reg, 0);
 	if (ret)
 		dev_err(soc_runtime->dev, "%s() error writing to rdmactl reg: %d\n",
 				__func__, ret);
@@ -193,10 +205,15 @@ static int lpass_platform_pcmops_prepare(struct snd_pcm_substream *substream)
 	struct lpass_data *drvdata =
 		snd_soc_platform_get_drvdata(soc_runtime->platform);
 	struct lpass_variant *v = drvdata->variant;
-	int ret, ch = pcm_data->rdma_ch;
+	int ret, ch, dir = substream->stream;
+
+	if (dir ==  SNDRV_PCM_STREAM_PLAYBACK)
+		ch = pcm_data->rdma_ch;
+	else
+		ch = pcm_data->wrdma_ch;
 
 	ret = regmap_write(drvdata->lpaif_map,
-			LPAIF_RDMABASE_REG(v, ch),
+			LPAIF_DMABASE_REG(v, ch, dir),
 			runtime->dma_addr);
 	if (ret) {
 		dev_err(soc_runtime->dev, "%s() error writing to rdmabase reg: %d\n",
@@ -205,7 +222,7 @@ static int lpass_platform_pcmops_prepare(struct snd_pcm_substream *substream)
 	}
 
 	ret = regmap_write(drvdata->lpaif_map,
-			LPAIF_RDMABUFF_REG(v, ch),
+			LPAIF_DMABUFF_REG(v, ch, dir),
 			(snd_pcm_lib_buffer_bytes(substream) >> 2) - 1);
 	if (ret) {
 		dev_err(soc_runtime->dev, "%s() error writing to rdmabuff reg: %d\n",
@@ -214,7 +231,7 @@ static int lpass_platform_pcmops_prepare(struct snd_pcm_substream *substream)
 	}
 
 	ret = regmap_write(drvdata->lpaif_map,
-			LPAIF_RDMAPER_REG(v, ch),
+			LPAIF_DMAPER_REG(v, ch, dir),
 			(snd_pcm_lib_period_bytes(substream) >> 2) - 1);
 	if (ret) {
 		dev_err(soc_runtime->dev, "%s() error writing to rdmaper reg: %d\n",
@@ -223,8 +240,8 @@ static int lpass_platform_pcmops_prepare(struct snd_pcm_substream *substream)
 	}
 
 	ret = regmap_update_bits(drvdata->lpaif_map,
-			LPAIF_RDMACTL_REG(v, ch),
-			LPAIF_RDMACTL_ENABLE_MASK, LPAIF_RDMACTL_ENABLE_ON);
+			LPAIF_DMACTL_REG(v, ch, dir),
+			LPAIF_DMACTL_ENABLE_MASK, LPAIF_DMACTL_ENABLE_ON);
 	if (ret) {
 		dev_err(soc_runtime->dev, "%s() error writing to rdmactl reg: %d\n",
 				__func__, ret);
@@ -242,7 +259,12 @@ static int lpass_platform_pcmops_trigger(struct snd_pcm_substream *substream,
 	struct lpass_data *drvdata =
 		snd_soc_platform_get_drvdata(soc_runtime->platform);
 	struct lpass_variant *v = drvdata->variant;
-	int ret, ch = pcm_data->rdma_ch;
+	int ret, ch, dir = substream->stream;
+
+	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
+		ch = pcm_data->rdma_ch;
+	else
+		ch = pcm_data->wrdma_ch;
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
@@ -269,9 +291,9 @@ static int lpass_platform_pcmops_trigger(struct snd_pcm_substream *substream,
 		}
 
 		ret = regmap_update_bits(drvdata->lpaif_map,
-				LPAIF_RDMACTL_REG(v, ch),
-				LPAIF_RDMACTL_ENABLE_MASK,
-				LPAIF_RDMACTL_ENABLE_ON);
+				LPAIF_DMACTL_REG(v, ch, dir),
+				LPAIF_DMACTL_ENABLE_MASK,
+				LPAIF_DMACTL_ENABLE_ON);
 		if (ret) {
 			dev_err(soc_runtime->dev, "%s() error writing to rdmactl reg: %d\n",
 					__func__, ret);
@@ -282,9 +304,9 @@ static int lpass_platform_pcmops_trigger(struct snd_pcm_substream *substream,
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		ret = regmap_update_bits(drvdata->lpaif_map,
-				LPAIF_RDMACTL_REG(v, ch),
-				LPAIF_RDMACTL_ENABLE_MASK,
-				LPAIF_RDMACTL_ENABLE_OFF);
+				LPAIF_DMACTL_REG(v, ch, dir),
+				LPAIF_DMACTL_ENABLE_MASK,
+				LPAIF_DMACTL_ENABLE_OFF);
 		if (ret) {
 			dev_err(soc_runtime->dev, "%s() error writing to rdmactl reg: %d\n",
 					__func__, ret);
@@ -314,10 +336,15 @@ static snd_pcm_uframes_t lpass_platform_pcmops_pointer(
 			snd_soc_platform_get_drvdata(soc_runtime->platform);
 	struct lpass_variant *v = drvdata->variant;
 	unsigned int base_addr, curr_addr;
-	int ret, ch = pcm_data->rdma_ch;
+	int ret, ch, dir = substream->stream;
+
+	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
+		ch = pcm_data->rdma_ch;
+	else
+		ch = pcm_data->wrdma_ch;
 
 	ret = regmap_read(drvdata->lpaif_map,
-			LPAIF_RDMABASE_REG(v, ch), &base_addr);
+			LPAIF_DMABASE_REG(v, ch, dir), &base_addr);
 	if (ret) {
 		dev_err(soc_runtime->dev, "%s() error reading from rdmabase reg: %d\n",
 				__func__, ret);
@@ -325,7 +352,7 @@ static snd_pcm_uframes_t lpass_platform_pcmops_pointer(
 	}
 
 	ret = regmap_read(drvdata->lpaif_map,
-			LPAIF_RDMACURR_REG(v, ch), &curr_addr);
+			LPAIF_DMACURR_REG(v, ch, dir), &curr_addr);
 	if (ret) {
 		dev_err(soc_runtime->dev, "%s() error reading from rdmacurr reg: %d\n",
 				__func__, ret);
@@ -439,101 +466,124 @@ static irqreturn_t lpass_platform_lpaif_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static int lpass_platform_alloc_buffer(struct snd_pcm_substream *substream,
-		struct snd_soc_pcm_runtime *rt)
-{
-	struct snd_dma_buffer *buf = &substream->dma_buffer;
-	size_t size = lpass_platform_pcm_hardware.buffer_bytes_max;
-
-	buf->dev.type = SNDRV_DMA_TYPE_DEV;
-	buf->dev.dev = rt->platform->dev;
-	buf->private_data = NULL;
-	buf->area = dma_alloc_coherent(rt->platform->dev, size, &buf->addr,
-			GFP_KERNEL);
-	if (!buf->area) {
-		dev_err(rt->platform->dev, "%s: Could not allocate DMA buffer\n",
-				__func__);
-		return -ENOMEM;
-	}
-	buf->bytes = size;
-
-	return 0;
-}
-
-static void lpass_platform_free_buffer(struct snd_pcm_substream *substream,
-		struct snd_soc_pcm_runtime *rt)
-{
-	struct snd_dma_buffer *buf = &substream->dma_buffer;
-
-	if (buf->area) {
-		dma_free_coherent(rt->dev, buf->bytes, buf->area,
-				buf->addr);
-	}
-	buf->area = NULL;
-}
-
 static int lpass_platform_pcm_new(struct snd_soc_pcm_runtime *soc_runtime)
 {
 	struct snd_pcm *pcm = soc_runtime->pcm;
-	struct snd_pcm_substream *substream =
-		pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	struct snd_pcm_substream *psubstream, *csubstream;
 	struct snd_soc_dai *cpu_dai = soc_runtime->cpu_dai;
 	struct lpass_data *drvdata =
 		snd_soc_platform_get_drvdata(soc_runtime->platform);
 	struct lpass_variant *v = drvdata->variant;
 	int ret;
 	struct lpass_pcm_data *data;
+	size_t size = lpass_platform_pcm_hardware.buffer_bytes_max;
 
 	data = devm_kzalloc(soc_runtime->dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 
-	if (v->alloc_dma_channel)
-		data->rdma_ch = v->alloc_dma_channel(drvdata);
+	data->i2s_port = cpu_dai->driver->id;
+	snd_soc_pcm_set_drvdata(soc_runtime, data);
 
-	if (IS_ERR_VALUE(data->rdma_ch))
-		return data->rdma_ch;
+	psubstream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	if (psubstream) {
+		if (v->alloc_dma_channel)
+			data->rdma_ch = v->alloc_dma_channel(drvdata,
+						SNDRV_PCM_STREAM_PLAYBACK);
 
-	drvdata->substream[data->rdma_ch] = substream;
-	data->i2s_port = cpu_dai->driver->id;
+		if (IS_ERR_VALUE(data->rdma_ch))
+			return data->rdma_ch;
 
-	snd_soc_pcm_set_drvdata(soc_runtime, data);
+		drvdata->substream[data->rdma_ch] = psubstream;
 
-	ret = lpass_platform_alloc_buffer(substream, soc_runtime);
-	if (ret)
-		return ret;
+		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+					soc_runtime->platform->dev,
+					size, &psubstream->dma_buffer);
+		if (ret)
+			goto playback_alloc_err;
 
-	ret = regmap_write(drvdata->lpaif_map,
+		ret = regmap_write(drvdata->lpaif_map,
 			LPAIF_RDMACTL_REG(v, data->rdma_ch), 0);
-	if (ret) {
-		dev_err(soc_runtime->dev, "%s() error writing to rdmactl reg: %d\n",
+		if (ret) {
+			dev_err(soc_runtime->dev,
+				"%s() error writing to rdmactl reg: %d\n",
+				__func__, ret);
+			goto capture_alloc_err;
+		}
+	}
+
+	csubstream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+	if (csubstream) {
+		if (v->alloc_dma_channel)
+			data->wrdma_ch = v->alloc_dma_channel(drvdata,
+						SNDRV_PCM_STREAM_CAPTURE);
+
+		if (IS_ERR_VALUE(data->wrdma_ch))
+			goto capture_alloc_err;
+
+		drvdata->substream[data->wrdma_ch] = csubstream;
+
+		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+					soc_runtime->platform->dev,
+					size, &csubstream->dma_buffer);
+		if (ret)
+			goto capture_alloc_err;
+
+		ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_WRDMACTL_REG(v, data->wrdma_ch), 0);
+		if (ret) {
+			dev_err(soc_runtime->dev,
+				"%s() error writing to wrdmactl reg: %d\n",
 				__func__, ret);
-		goto err_buf;
+			goto capture_reg_err;
+		}
 	}
 
 	return 0;
 
-err_buf:
-	lpass_platform_free_buffer(substream, soc_runtime);
+capture_reg_err:
+	if (csubstream)
+		snd_dma_free_pages(&csubstream->dma_buffer);
+
+capture_alloc_err:
+	if (psubstream)
+		snd_dma_free_pages(&psubstream->dma_buffer);
+
+ playback_alloc_err:
+	dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n");
+
 	return ret;
 }
 
 static void lpass_platform_pcm_free(struct snd_pcm *pcm)
 {
-	struct snd_pcm_substream *substream =
-		pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
-	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct lpass_data *drvdata =
-		snd_soc_platform_get_drvdata(soc_runtime->platform);
-	struct lpass_pcm_data *data = snd_soc_pcm_get_drvdata(soc_runtime);
-	struct lpass_variant *v = drvdata->variant;
-
-	drvdata->substream[data->rdma_ch] = NULL;
-
-	if (v->free_dma_channel)
-		v->free_dma_channel(drvdata, data->rdma_ch);
-
-	lpass_platform_free_buffer(substream, soc_runtime);
+	struct snd_soc_pcm_runtime *rt;
+	struct lpass_data *drvdata;
+	struct lpass_pcm_data *data;
+	struct lpass_variant *v;
+	struct snd_pcm_substream *substream;
+	int ch, i;
+
+	for (i = 0; i < ARRAY_SIZE(pcm->streams); i++) {
+		substream = pcm->streams[i].substream;
+		if (substream) {
+			rt = substream->private_data;
+			data = snd_soc_pcm_get_drvdata(rt);
+			drvdata = snd_soc_platform_get_drvdata(rt->platform);
+
+			ch = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+				? data->rdma_ch
+				: data->wrdma_ch;
+			v = drvdata->variant;
+			drvdata->substream[ch] = NULL;
+			if (v->free_dma_channel)
+				v->free_dma_channel(drvdata, ch);
+
+			snd_dma_free_pages(&substream->dma_buffer);
+			substream->dma_buffer.area = NULL;
+			substream->dma_buffer.addr = 0;
+		}
+	}
 }
 
 static struct snd_soc_platform_driver lpass_platform_driver = {
diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h
index 0b63e2e5b..30714ad1e 100644
--- a/sound/soc/qcom/lpass.h
+++ b/sound/soc/qcom/lpass.h
@@ -50,7 +50,7 @@ struct lpass_data {
 	struct lpass_variant *variant;
 
 	/* bit map to keep track of static channel allocations */
-	unsigned long rdma_ch_bit_map;
+	unsigned long dma_ch_bit_map;
 
 	/* used it for handling interrupt per dma channel */
 	struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
@@ -71,16 +71,20 @@ struct lpass_variant {
 	u32	rdma_reg_base;
 	u32	rdma_reg_stride;
 	u32	rdma_channels;
+	u32	wrdma_reg_base;
+	u32	wrdma_reg_stride;
+	u32	wrdma_channels;
 
 	/**
 	 * on SOCs like APQ8016 the channel control bits start
 	 * at different offset to ipq806x
 	 **/
-	u32	rdmactl_audif_start;
+	u32	dmactl_audif_start;
+	u32	wrdma_channel_start;
 	/* SOC specific intialization like clocks */
 	int (*init)(struct platform_device *pdev);
 	int (*exit)(struct platform_device *pdev);
-	int (*alloc_dma_channel)(struct lpass_data *data);
+	int (*alloc_dma_channel)(struct lpass_data *data, int direction);
 	int (*free_dma_channel)(struct lpass_data *data, int ch);
 
 	/* SOC specific dais */