diff --git a/sound/soc/codecs/msm8916-wcd-digital.c b/sound/soc/codecs/msm8916-wcd-digital.c
index a63961861e55..ec00893ca92a 100644
--- a/sound/soc/codecs/msm8916-wcd-digital.c
+++ b/sound/soc/codecs/msm8916-wcd-digital.c
@@ -187,6 +187,43 @@
 #define MSM8916_WCD_DIGITAL_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
 				     SNDRV_PCM_FMTBIT_S32_LE)
 
+/* Codec supports 2 IIR filters */
+enum {
+	IIR1 = 0,
+	IIR2,
+	IIR_MAX,
+};
+
+/* Codec supports 5 bands */
+enum {
+	BAND1 = 0,
+	BAND2,
+	BAND3,
+	BAND4,
+	BAND5,
+	BAND_MAX,
+};
+
+#define WCD_IIR_FILTER_SIZE	(sizeof(u32)*BAND_MAX)
+
+#define WCD_IIR_FILTER_CTL(xname, iidx, bidx) \
+{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+	.info = wcd_iir_filter_info, \
+	.get = msm8x16_wcd_get_iir_band_audio_mixer, \
+	.put = msm8x16_wcd_put_iir_band_audio_mixer, \
+	.private_value = (unsigned long)&(struct wcd_iir_filter_ctl) { \
+		.iir_idx = iidx, \
+		.band_idx = bidx, \
+		.bytes_ext = {.max = WCD_IIR_FILTER_SIZE, }, \
+	} \
+}
+
+struct wcd_iir_filter_ctl {
+	unsigned int iir_idx;
+	unsigned int band_idx;
+	struct soc_bytes_ext bytes_ext;
+};
+
 struct msm8916_wcd_digital_priv {
 	struct clk *ahbclk, *mclk;
 };
@@ -298,6 +335,200 @@ static SOC_ENUM_SINGLE_DECL(rx2_dcb_cutoff_enum, LPASS_CDC_RX2_B4_CTL, 0,
 static SOC_ENUM_SINGLE_DECL(rx3_dcb_cutoff_enum, LPASS_CDC_RX3_B4_CTL, 0,
 			    dc_blocker_cutoff_text);
 
+static int msm8x16_wcd_codec_set_iir_gain(struct snd_soc_dapm_widget *w,
+		struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_component *component =
+			snd_soc_dapm_to_component(w->dapm);
+	int value = 0, reg = 0;
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		if (w->shift == 0)
+			reg = LPASS_CDC_IIR1_GAIN_B1_CTL;
+		else if (w->shift == 1)
+			reg = LPASS_CDC_IIR2_GAIN_B1_CTL;
+		value = snd_soc_component_read32(component, reg);
+		snd_soc_component_write(component, reg, value);
+		break;
+	default:
+		pr_err("%s: event = %d not expected\n", __func__, event);
+	}
+	return 0;
+}
+
+static int msm8x16_wcd_get_iir_enable_audio_mixer(
+					struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+			snd_soc_kcontrol_component(kcontrol);
+	struct soc_mixer_control *mixer =
+			(struct soc_mixer_control *)kcontrol->private_value;
+	int iir_idx = mixer->reg;
+	int band_idx = mixer->shift;
+
+	ucontrol->value.integer.value[0] =
+		(snd_soc_component_read32(component,
+			    (LPASS_CDC_IIR1_CTL + 64 * iir_idx)) &
+		(1 << band_idx)) != 0;
+
+	return 0;
+}
+
+static int msm8x16_wcd_put_iir_enable_audio_mixer(
+					struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+			snd_soc_kcontrol_component(kcontrol);
+	struct soc_mixer_control *mixer =
+			(struct soc_mixer_control *)kcontrol->private_value;
+	int iir_idx = mixer->reg;
+	int band_idx = mixer->shift;
+	int value = ucontrol->value.integer.value[0];
+
+	/* Mask first 5 bits, 6-8 are reserved */
+	snd_soc_component_update_bits(component,
+		(LPASS_CDC_IIR1_CTL + 64 * iir_idx),
+			    (1 << band_idx), (value << band_idx));
+
+	return 0;
+}
+
+static uint32_t get_iir_band_coeff(struct snd_soc_component *component,
+				   int iir_idx, int band_idx,
+				   int coeff_idx)
+{
+	uint32_t value = 0;
+
+	/* Address does not automatically update if reading */
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B1_CTL + 64 * iir_idx),
+		((band_idx * BAND_MAX + coeff_idx)
+		* sizeof(uint32_t)) & 0x7F);
+
+	value |= snd_soc_component_read32(component,
+		(LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx));
+
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B1_CTL + 64 * iir_idx),
+		((band_idx * BAND_MAX + coeff_idx)
+		* sizeof(uint32_t) + 1) & 0x7F);
+
+	value |= (snd_soc_component_read32(component,
+		(LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx)) << 8);
+
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B1_CTL + 64 * iir_idx),
+		((band_idx * BAND_MAX + coeff_idx)
+		* sizeof(uint32_t) + 2) & 0x7F);
+
+	value |= (snd_soc_component_read32(component,
+		(LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx)) << 16);
+
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B1_CTL + 64 * iir_idx),
+		((band_idx * BAND_MAX + coeff_idx)
+		* sizeof(uint32_t) + 3) & 0x7F);
+
+	/* Mask bits top 2 bits since they are reserved */
+	value |= ((snd_soc_component_read32(component,
+		 (LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx)) & 0x3f) << 24);
+	return value;
+
+}
+
+static int msm8x16_wcd_get_iir_band_audio_mixer(
+					struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *ucontrol)
+{
+
+	struct snd_soc_component *component =
+			snd_soc_kcontrol_component(kcontrol);
+	struct wcd_iir_filter_ctl *ctl =
+			(struct wcd_iir_filter_ctl *)kcontrol->private_value;
+	struct soc_bytes_ext *params = &ctl->bytes_ext;
+	int iir_idx = ctl->iir_idx;
+	int band_idx = ctl->band_idx;
+	u32 coeff[BAND_MAX];
+
+	coeff[0] = get_iir_band_coeff(component, iir_idx, band_idx, 0);
+	coeff[1] = get_iir_band_coeff(component, iir_idx, band_idx, 1);
+	coeff[2] = get_iir_band_coeff(component, iir_idx, band_idx, 2);
+	coeff[3] = get_iir_band_coeff(component, iir_idx, band_idx, 3);
+	coeff[4] = get_iir_band_coeff(component, iir_idx, band_idx, 4);
+
+	memcpy(ucontrol->value.bytes.data, &coeff[0], params->max);
+
+	return 0;
+}
+
+static void set_iir_band_coeff(struct snd_soc_component *component,
+				int iir_idx, int band_idx,
+				uint32_t value)
+{
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx),
+		(value & 0xFF));
+
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx),
+		(value >> 8) & 0xFF);
+
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx),
+		(value >> 16) & 0xFF);
+
+	/* Mask top 2 bits, 7-8 are reserved */
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B2_CTL + 64 * iir_idx),
+		(value >> 24) & 0x3F);
+}
+
+static int msm8x16_wcd_put_iir_band_audio_mixer(
+					struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+			snd_soc_kcontrol_component(kcontrol);
+	struct wcd_iir_filter_ctl *ctl =
+			(struct wcd_iir_filter_ctl *)kcontrol->private_value;
+	struct soc_bytes_ext *params = &ctl->bytes_ext;
+	int iir_idx = ctl->iir_idx;
+	int band_idx = ctl->band_idx;
+	u32 coeff[BAND_MAX];
+
+	memcpy(&coeff[0], ucontrol->value.bytes.data, params->max);
+
+	/* Mask top bit it is reserved */
+	/* Updates addr automatically for each B2 write */
+	snd_soc_component_write(component,
+		(LPASS_CDC_IIR1_COEF_B1_CTL + 64 * iir_idx),
+		(band_idx * BAND_MAX * sizeof(uint32_t)) & 0x7F);
+
+	set_iir_band_coeff(component, iir_idx, band_idx, coeff[0]);
+	set_iir_band_coeff(component, iir_idx, band_idx, coeff[1]);
+	set_iir_band_coeff(component, iir_idx, band_idx, coeff[2]);
+	set_iir_band_coeff(component, iir_idx, band_idx, coeff[3]);
+	set_iir_band_coeff(component, iir_idx, band_idx, coeff[4]);
+
+	return 0;
+}
+
+static int wcd_iir_filter_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *ucontrol)
+{
+	struct wcd_iir_filter_ctl *ctl =
+		(struct wcd_iir_filter_ctl *)kcontrol->private_value;
+	struct soc_bytes_ext *params = &ctl->bytes_ext;
+
+	ucontrol->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+	ucontrol->count = params->max;
+
+	return 0;
+}
+
 static const struct snd_kcontrol_new msm8916_wcd_digital_snd_controls[] = {
 	SOC_SINGLE_S8_TLV("RX1 Digital Volume", LPASS_CDC_RX1_VOL_CTL_B2_CTL,
 			  -128, 127, digital_gain),
@@ -322,6 +553,73 @@ static const struct snd_kcontrol_new msm8916_wcd_digital_snd_controls[] = {
 	SOC_SINGLE("RX1 Mute Switch", LPASS_CDC_RX1_B6_CTL, 0, 1, 0),
 	SOC_SINGLE("RX2 Mute Switch", LPASS_CDC_RX2_B6_CTL, 0, 1, 0),
 	SOC_SINGLE("RX3 Mute Switch", LPASS_CDC_RX3_B6_CTL, 0, 1, 0),
+
+	SOC_SINGLE_EXT("IIR1 Enable Band1", IIR1, BAND1, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR1 Enable Band2", IIR1, BAND2, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR1 Enable Band3", IIR1, BAND3, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR1 Enable Band4", IIR1, BAND4, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR1 Enable Band5", IIR1, BAND5, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR2 Enable Band1", IIR2, BAND1, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR2 Enable Band2", IIR2, BAND2, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR2 Enable Band3", IIR2, BAND3, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR2 Enable Band4", IIR2, BAND4, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	SOC_SINGLE_EXT("IIR2 Enable Band5", IIR2, BAND5, 1, 0,
+	msm8x16_wcd_get_iir_enable_audio_mixer,
+	msm8x16_wcd_put_iir_enable_audio_mixer),
+	WCD_IIR_FILTER_CTL("IIR1 Band1", IIR1, BAND1),
+	WCD_IIR_FILTER_CTL("IIR1 Band2", IIR1, BAND2),
+	WCD_IIR_FILTER_CTL("IIR1 Band3", IIR1, BAND3),
+	WCD_IIR_FILTER_CTL("IIR1 Band4", IIR1, BAND4),
+	WCD_IIR_FILTER_CTL("IIR1 Band5", IIR1, BAND5),
+	WCD_IIR_FILTER_CTL("IIR2 Band1", IIR2, BAND1),
+	WCD_IIR_FILTER_CTL("IIR2 Band2", IIR2, BAND2),
+	WCD_IIR_FILTER_CTL("IIR2 Band3", IIR2, BAND3),
+	WCD_IIR_FILTER_CTL("IIR2 Band4", IIR2, BAND4),
+	WCD_IIR_FILTER_CTL("IIR2 Band5", IIR2, BAND5),
+
+	SOC_SINGLE_SX_TLV("IIR1 INP1 Volume",
+			  LPASS_CDC_IIR1_GAIN_B1_CTL,
+			0,  -84, 40, digital_gain),
+	SOC_SINGLE_SX_TLV("IIR1 INP2 Volume",
+			  LPASS_CDC_IIR1_GAIN_B2_CTL,
+			0,  -84, 40, digital_gain),
+	SOC_SINGLE_SX_TLV("IIR1 INP3 Volume",
+			  LPASS_CDC_IIR1_GAIN_B3_CTL,
+			0,  -84, 40, digital_gain),
+	SOC_SINGLE_SX_TLV("IIR1 INP4 Volume",
+			  LPASS_CDC_IIR1_GAIN_B4_CTL,
+			0,  -84,	40, digital_gain),
+	SOC_SINGLE_SX_TLV("IIR2 INP1 Volume",
+			  LPASS_CDC_IIR2_GAIN_B1_CTL,
+			0,  -84, 40, digital_gain),
+	SOC_SINGLE_SX_TLV("IIR2 INP2 Volume",
+			  LPASS_CDC_IIR2_GAIN_B2_CTL,
+			0,  -84, 40, digital_gain),
+	SOC_SINGLE_SX_TLV("IIR2 INP3 Volume",
+			  LPASS_CDC_IIR2_GAIN_B3_CTL,
+			0,  -84, 40, digital_gain),
+	SOC_SINGLE_SX_TLV("IIR2 INP4 Volume",
+			  LPASS_CDC_IIR2_GAIN_B4_CTL,
+			0,  -84, 40, digital_gain),
+
 };
 
 static int msm8916_wcd_digital_enable_interpolator(
@@ -448,6 +746,24 @@ static int msm8916_wcd_digital_enable_dmic(struct snd_soc_dapm_widget *w,
 	return 0;
 }
 
+static const char * const iir_inp1_text[] = {
+	"ZERO", "DEC1", "DEC2", "RX1", "RX2", "RX3"
+};
+
+static const struct soc_enum iir1_inp1_mux_enum =
+	SOC_ENUM_SINGLE(LPASS_CDC_CONN_EQ1_B1_CTL,
+		0, 6, iir_inp1_text);
+
+static const struct soc_enum iir2_inp1_mux_enum =
+	SOC_ENUM_SINGLE(LPASS_CDC_CONN_EQ2_B1_CTL,
+		0, 6, iir_inp1_text);
+
+static const struct snd_kcontrol_new iir1_inp1_mux =
+	SOC_DAPM_ENUM("IIR1 INP1 Mux", iir1_inp1_mux_enum);
+
+static const struct snd_kcontrol_new iir2_inp1_mux =
+	SOC_DAPM_ENUM("IIR2 INP1 Mux", iir2_inp1_mux_enum);
+
 static const struct snd_soc_dapm_widget msm8916_wcd_digital_dapm_widgets[] = {
 	/*RX stuff */
 	SND_SOC_DAPM_AIF_IN("I2S RX1", NULL, 0, SND_SOC_NOPM, 0, 0),
@@ -534,6 +850,17 @@ static const struct snd_soc_dapm_widget msm8916_wcd_digital_dapm_widgets[] = {
 	SND_SOC_DAPM_MIC("Digital Mic1", NULL),
 	SND_SOC_DAPM_MIC("Digital Mic2", NULL),
 
+
+
+	/* Sidetone */
+	SND_SOC_DAPM_MUX("IIR1 INP1 MUX", SND_SOC_NOPM, 0, 0, &iir1_inp1_mux),
+	SND_SOC_DAPM_PGA_E("IIR1", LPASS_CDC_CLK_SD_CTL, 0, 0, NULL, 0,
+		msm8x16_wcd_codec_set_iir_gain, SND_SOC_DAPM_POST_PMU),
+
+	SND_SOC_DAPM_MUX("IIR2 INP1 MUX", SND_SOC_NOPM, 0, 0, &iir2_inp1_mux),
+	SND_SOC_DAPM_PGA_E("IIR2", LPASS_CDC_CLK_SD_CTL, 1, 0, NULL, 0,
+		msm8x16_wcd_codec_set_iir_gain, SND_SOC_DAPM_POST_PMU),
+
 };
 
 static int msm8916_wcd_digital_get_clks(struct platform_device *pdev,
@@ -708,10 +1035,14 @@ static const struct snd_soc_dapm_route msm8916_wcd_digital_audio_map[] = {
 	{"RX1 MIX1 INP1", "RX1", "I2S RX1"},
 	{"RX1 MIX1 INP1", "RX2", "I2S RX2"},
 	{"RX1 MIX1 INP1", "RX3", "I2S RX3"},
+	{"RX1 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX1 MIX1 INP1", "IIR2", "IIR2"},
 
 	{"RX1 MIX1 INP2", "RX1", "I2S RX1"},
 	{"RX1 MIX1 INP2", "RX2", "I2S RX2"},
 	{"RX1 MIX1 INP2", "RX3", "I2S RX3"},
+	{"RX1 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX1 MIX1 INP2", "IIR2", "IIR2"},
 
 	{"RX1 MIX1 INP3", "RX1", "I2S RX1"},
 	{"RX1 MIX1 INP3", "RX2", "I2S RX2"},
@@ -725,13 +1056,18 @@ static const struct snd_soc_dapm_route msm8916_wcd_digital_audio_map[] = {
 	{"RX2 MIX1", NULL, "RX2 MIX1 INP2"},
 	{"RX2 MIX1", NULL, "RX2 MIX1 INP3"},
 
+
 	{"RX2 MIX1 INP1", "RX1", "I2S RX1"},
 	{"RX2 MIX1 INP1", "RX2", "I2S RX2"},
 	{"RX2 MIX1 INP1", "RX3", "I2S RX3"},
+	{"RX2 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX2 MIX1 INP1", "IIR2", "IIR2"},
 
 	{"RX2 MIX1 INP2", "RX1", "I2S RX1"},
 	{"RX2 MIX1 INP2", "RX2", "I2S RX2"},
 	{"RX2 MIX1 INP2", "RX3", "I2S RX3"},
+	{"RX2 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX2 MIX1 INP1", "IIR2", "IIR2"},
 
 	{"RX2 MIX1 INP3", "RX1", "I2S RX1"},
 	{"RX2 MIX1 INP3", "RX2", "I2S RX2"},
@@ -748,10 +1084,27 @@ static const struct snd_soc_dapm_route msm8916_wcd_digital_audio_map[] = {
 	{"RX3 MIX1 INP1", "RX1", "I2S RX1"},
 	{"RX3 MIX1 INP1", "RX2", "I2S RX2"},
 	{"RX3 MIX1 INP1", "RX3", "I2S RX3"},
+	{"RX3 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX3 MIX1 INP1", "IIR2", "IIR2"},
 
 	{"RX3 MIX1 INP2", "RX1", "I2S RX1"},
 	{"RX3 MIX1 INP2", "RX2", "I2S RX2"},
 	{"RX3 MIX1 INP2", "RX3", "I2S RX3"},
+	{"RX3 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX3 MIX1 INP2", "IIR2", "IIR2"},
+
+	{"RX1 MIX2 INP1", "IIR1", "IIR1"},
+	{"RX2 MIX2 INP1", "IIR1", "IIR1"},
+	{"RX1 MIX2 INP1", "IIR2", "IIR2"},
+	{"RX2 MIX2 INP1", "IIR2", "IIR2"},
+
+	{"IIR1", NULL, "IIR1 INP1 MUX"},
+	{"IIR1 INP1 MUX", "DEC1", "DEC1 MUX"},
+	{"IIR1 INP1 MUX", "DEC2", "DEC2 MUX"},
+
+	{"IIR2", NULL, "IIR2 INP1 MUX"},
+	{"IIR2 INP1 MUX", "DEC1", "DEC1 MUX"},
+	{"IIR2 INP1 MUX", "DEC2", "DEC2 MUX"},
 
 	{"RX3 MIX1 INP3", "RX1", "I2S RX1"},
 	{"RX3 MIX1 INP3", "RX2", "I2S RX2"},
