ASoC: wcd9320: Enable codec lookback support through IIR2 path

WCD9320 codec supports loopback through IIR filters. Either IIR1
or IIR2 can be used to setup loopback path. Add support and routing
to enable loopback through IIR2 filter path

CRs-fixed: 457679
Change-Id: Idf8771d508afbeb6c7c2cb384328141cb942982c
Signed-off-by: Fred Oh <fred@codeaurora.org>
diff --git a/sound/soc/codecs/wcd9320.c b/sound/soc/codecs/wcd9320.c
index 08167ca..8f63250 100644
--- a/sound/soc/codecs/wcd9320.c
+++ b/sound/soc/codecs/wcd9320.c
@@ -1074,6 +1074,21 @@
 		40, digital_gain),
 	SOC_SINGLE_S8_TLV("IIR1 INP4 Volume", TAIKO_A_CDC_IIR1_GAIN_B4_CTL, -84,
 		40, digital_gain),
+	SOC_SINGLE_S8_TLV("IIR2 INP1 Volume", TAIKO_A_CDC_IIR2_GAIN_B1_CTL, -84,
+		40, digital_gain),
+	SOC_SINGLE_S8_TLV("IIR2 INP2 Volume", TAIKO_A_CDC_IIR2_GAIN_B2_CTL, -84,
+		40, digital_gain),
+	SOC_SINGLE_S8_TLV("IIR2 INP3 Volume", TAIKO_A_CDC_IIR2_GAIN_B3_CTL, -84,
+		40, digital_gain),
+	SOC_SINGLE_S8_TLV("IIR2 INP4 Volume", TAIKO_A_CDC_IIR2_GAIN_B4_CTL, -84,
+		40, digital_gain),
+	SOC_SINGLE_TLV("ADC1 Volume", TAIKO_A_TX_1_2_EN, 5, 3, 0, analog_gain),
+	SOC_SINGLE_TLV("ADC2 Volume", TAIKO_A_TX_1_2_EN, 1, 3, 0, analog_gain),
+	SOC_SINGLE_TLV("ADC3 Volume", TAIKO_A_TX_3_4_EN, 5, 3, 0, analog_gain),
+	SOC_SINGLE_TLV("ADC4 Volume", TAIKO_A_TX_3_4_EN, 1, 3, 0, analog_gain),
+	SOC_SINGLE_TLV("ADC5 Volume", TAIKO_A_TX_5_6_EN, 5, 3, 0, analog_gain),
+	SOC_SINGLE_TLV("ADC6 Volume", TAIKO_A_TX_5_6_EN, 1, 3, 0, analog_gain),
+
 
 	SOC_SINGLE_EXT("ANC Slot", SND_SOC_NOPM, 0, 100, 0, taiko_get_anc_slot,
 		taiko_put_anc_slot),
@@ -1388,7 +1403,7 @@
 	"ZERO", "EAR_HPH_L", "EAR_LINE_1",
 };
 
-static const char * const iir1_inp1_text[] = {
+static const char * const iir_inp1_text[] = {
 	"ZERO", "DEC1", "DEC2", "DEC3", "DEC4", "DEC5", "DEC6", "DEC7", "DEC8",
 	"DEC9", "DEC10", "RX1", "RX2", "RX3", "RX4", "RX5", "RX6", "RX7"
 };
@@ -1536,7 +1551,10 @@
 	SOC_ENUM_SINGLE(TAIKO_A_CDC_CONN_ANC_B2_CTL, 0, 3, anc1_fb_mux_text);
 
 static const struct soc_enum iir1_inp1_mux_enum =
-	SOC_ENUM_SINGLE(TAIKO_A_CDC_CONN_EQ1_B1_CTL, 0, 18, iir1_inp1_text);
+	SOC_ENUM_SINGLE(TAIKO_A_CDC_CONN_EQ1_B1_CTL, 0, 18, iir_inp1_text);
+
+static const struct soc_enum iir2_inp1_mux_enum =
+	SOC_ENUM_SINGLE(TAIKO_A_CDC_CONN_EQ2_B1_CTL, 0, 18, iir_inp1_text);
 
 static const struct snd_kcontrol_new rx_mix1_inp1_mux =
 	SOC_DAPM_ENUM("RX1 MIX1 INP1 Mux", rx_mix1_inp1_chain_enum);
@@ -1760,6 +1778,9 @@
 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_kcontrol_new anc1_mux =
 	SOC_DAPM_ENUM("ANC1 MUX Mux", anc1_mux_enum);
 
@@ -3372,6 +3393,7 @@
 	{"RX1 MIX1 INP1", "RX6", "SLIM RX6"},
 	{"RX1 MIX1 INP1", "RX7", "SLIM RX7"},
 	{"RX1 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX1 MIX1 INP1", "IIR2", "IIR2"},
 	{"RX1 MIX1 INP2", "RX1", "SLIM RX1"},
 	{"RX1 MIX1 INP2", "RX2", "SLIM RX2"},
 	{"RX1 MIX1 INP2", "RX3", "SLIM RX3"},
@@ -3380,6 +3402,7 @@
 	{"RX1 MIX1 INP2", "RX6", "SLIM RX6"},
 	{"RX1 MIX1 INP2", "RX7", "SLIM RX7"},
 	{"RX1 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX1 MIX1 INP2", "IIR2", "IIR2"},
 	{"RX1 MIX1 INP3", "RX1", "SLIM RX1"},
 	{"RX1 MIX1 INP3", "RX2", "SLIM RX2"},
 	{"RX1 MIX1 INP3", "RX3", "SLIM RX3"},
@@ -3395,6 +3418,7 @@
 	{"RX2 MIX1 INP1", "RX6", "SLIM RX6"},
 	{"RX2 MIX1 INP1", "RX7", "SLIM RX7"},
 	{"RX2 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX2 MIX1 INP1", "IIR2", "IIR2"},
 	{"RX2 MIX1 INP2", "RX1", "SLIM RX1"},
 	{"RX2 MIX1 INP2", "RX2", "SLIM RX2"},
 	{"RX2 MIX1 INP2", "RX3", "SLIM RX3"},
@@ -3403,6 +3427,7 @@
 	{"RX2 MIX1 INP2", "RX6", "SLIM RX6"},
 	{"RX2 MIX1 INP2", "RX7", "SLIM RX7"},
 	{"RX2 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX2 MIX1 INP2", "IIR2", "IIR2"},
 	{"RX3 MIX1 INP1", "RX1", "SLIM RX1"},
 	{"RX3 MIX1 INP1", "RX2", "SLIM RX2"},
 	{"RX3 MIX1 INP1", "RX3", "SLIM RX3"},
@@ -3411,6 +3436,7 @@
 	{"RX3 MIX1 INP1", "RX6", "SLIM RX6"},
 	{"RX3 MIX1 INP1", "RX7", "SLIM RX7"},
 	{"RX3 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX3 MIX1 INP1", "IIR2", "IIR2"},
 	{"RX3 MIX1 INP2", "RX1", "SLIM RX1"},
 	{"RX3 MIX1 INP2", "RX2", "SLIM RX2"},
 	{"RX3 MIX1 INP2", "RX3", "SLIM RX3"},
@@ -3419,6 +3445,7 @@
 	{"RX3 MIX1 INP2", "RX6", "SLIM RX6"},
 	{"RX3 MIX1 INP2", "RX7", "SLIM RX7"},
 	{"RX3 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX3 MIX1 INP2", "IIR2", "IIR2"},
 	{"RX4 MIX1 INP1", "RX1", "SLIM RX1"},
 	{"RX4 MIX1 INP1", "RX2", "SLIM RX2"},
 	{"RX4 MIX1 INP1", "RX3", "SLIM RX3"},
@@ -3427,6 +3454,7 @@
 	{"RX4 MIX1 INP1", "RX6", "SLIM RX6"},
 	{"RX4 MIX1 INP1", "RX7", "SLIM RX7"},
 	{"RX4 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX4 MIX1 INP1", "IIR2", "IIR2"},
 	{"RX4 MIX1 INP2", "RX1", "SLIM RX1"},
 	{"RX4 MIX1 INP2", "RX2", "SLIM RX2"},
 	{"RX4 MIX1 INP2", "RX3", "SLIM RX3"},
@@ -3435,6 +3463,7 @@
 	{"RX4 MIX1 INP2", "RX6", "SLIM RX6"},
 	{"RX4 MIX1 INP2", "RX7", "SLIM RX7"},
 	{"RX4 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX4 MIX1 INP2", "IIR2", "IIR2"},
 	{"RX5 MIX1 INP1", "RX1", "SLIM RX1"},
 	{"RX5 MIX1 INP1", "RX2", "SLIM RX2"},
 	{"RX5 MIX1 INP1", "RX3", "SLIM RX3"},
@@ -3443,6 +3472,7 @@
 	{"RX5 MIX1 INP1", "RX6", "SLIM RX6"},
 	{"RX5 MIX1 INP1", "RX7", "SLIM RX7"},
 	{"RX5 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX5 MIX1 INP1", "IIR2", "IIR2"},
 	{"RX5 MIX1 INP2", "RX1", "SLIM RX1"},
 	{"RX5 MIX1 INP2", "RX2", "SLIM RX2"},
 	{"RX5 MIX1 INP2", "RX3", "SLIM RX3"},
@@ -3451,6 +3481,7 @@
 	{"RX5 MIX1 INP2", "RX6", "SLIM RX6"},
 	{"RX5 MIX1 INP2", "RX7", "SLIM RX7"},
 	{"RX5 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX5 MIX1 INP2", "IIR2", "IIR2"},
 	{"RX6 MIX1 INP1", "RX1", "SLIM RX1"},
 	{"RX6 MIX1 INP1", "RX2", "SLIM RX2"},
 	{"RX6 MIX1 INP1", "RX3", "SLIM RX3"},
@@ -3459,6 +3490,7 @@
 	{"RX6 MIX1 INP1", "RX6", "SLIM RX6"},
 	{"RX6 MIX1 INP1", "RX7", "SLIM RX7"},
 	{"RX6 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX6 MIX1 INP1", "IIR2", "IIR2"},
 	{"RX6 MIX1 INP2", "RX1", "SLIM RX1"},
 	{"RX6 MIX1 INP2", "RX2", "SLIM RX2"},
 	{"RX6 MIX1 INP2", "RX3", "SLIM RX3"},
@@ -3467,6 +3499,7 @@
 	{"RX6 MIX1 INP2", "RX6", "SLIM RX6"},
 	{"RX6 MIX1 INP2", "RX7", "SLIM RX7"},
 	{"RX6 MIX1 INP2", "IIR1", "IIR1"},
+	{"RX6 MIX1 INP2", "IIR2", "IIR2"},
 	{"RX7 MIX1 INP1", "RX1", "SLIM RX1"},
 	{"RX7 MIX1 INP1", "RX2", "SLIM RX2"},
 	{"RX7 MIX1 INP1", "RX3", "SLIM RX3"},
@@ -3475,6 +3508,7 @@
 	{"RX7 MIX1 INP1", "RX6", "SLIM RX6"},
 	{"RX7 MIX1 INP1", "RX7", "SLIM RX7"},
 	{"RX7 MIX1 INP1", "IIR1", "IIR1"},
+	{"RX7 MIX1 INP1", "IIR2", "IIR2"},
 	{"RX7 MIX1 INP2", "RX1", "SLIM RX1"},
 	{"RX7 MIX1 INP2", "RX2", "SLIM RX2"},
 	{"RX7 MIX1 INP2", "RX3", "SLIM RX3"},
@@ -3489,6 +3523,13 @@
 	{"RX2 MIX2 INP2", "IIR1", "IIR1"},
 	{"RX7 MIX2 INP1", "IIR1", "IIR1"},
 	{"RX7 MIX2 INP2", "IIR1", "IIR1"},
+	{"RX7 MIX1 INP2", "IIR2", "IIR2"},
+	{"RX1 MIX2 INP1", "IIR2", "IIR2"},
+	{"RX1 MIX2 INP2", "IIR2", "IIR2"},
+	{"RX2 MIX2 INP1", "IIR2", "IIR2"},
+	{"RX2 MIX2 INP2", "IIR2", "IIR2"},
+	{"RX7 MIX2 INP1", "IIR2", "IIR2"},
+	{"RX7 MIX2 INP2", "IIR2", "IIR2"},
 
 	/* Decimator Inputs */
 	{"DEC1 MUX", "DMIC1", "DMIC1"},
@@ -3561,6 +3602,18 @@
 	{"IIR1 INP1 MUX", "DEC9", "DEC9 MUX"},
 	{"IIR1 INP1 MUX", "DEC10", "DEC10 MUX"},
 
+	{"IIR2", NULL, "IIR2 INP1 MUX"},
+	{"IIR2 INP1 MUX", "DEC1", "DEC1 MUX"},
+	{"IIR2 INP1 MUX", "DEC2", "DEC2 MUX"},
+	{"IIR2 INP1 MUX", "DEC3", "DEC3 MUX"},
+	{"IIR2 INP1 MUX", "DEC4", "DEC4 MUX"},
+	{"IIR2 INP1 MUX", "DEC5", "DEC5 MUX"},
+	{"IIR2 INP1 MUX", "DEC6", "DEC6 MUX"},
+	{"IIR2 INP1 MUX", "DEC7", "DEC7 MUX"},
+	{"IIR2 INP1 MUX", "DEC8", "DEC8 MUX"},
+	{"IIR2 INP1 MUX", "DEC9", "DEC9 MUX"},
+	{"IIR2 INP1 MUX", "DEC10", "DEC10 MUX"},
+
 	{"MIC BIAS1 Internal1", NULL, "LDO_H"},
 	{"MIC BIAS1 Internal2", NULL, "LDO_H"},
 	{"MIC BIAS1 External", NULL, "LDO_H"},
@@ -5114,6 +5167,9 @@
 	SND_SOC_DAPM_MUX("IIR1 INP1 MUX", SND_SOC_NOPM, 0, 0, &iir1_inp1_mux),
 	SND_SOC_DAPM_PGA("IIR1", TAIKO_A_CDC_CLK_SD_CTL, 0, 0, NULL, 0),
 
+	SND_SOC_DAPM_MUX("IIR2 INP1 MUX", SND_SOC_NOPM, 0, 0, &iir2_inp1_mux),
+	SND_SOC_DAPM_PGA("IIR2", TAIKO_A_CDC_CLK_SD_CTL, 1, 0, NULL, 0),
+
 	/* AUX PGA */
 	SND_SOC_DAPM_ADC_E("AUX_PGA_Left", NULL, TAIKO_A_RX_AUX_SW_CTL, 7, 0,
 		taiko_codec_enable_aux_pga, SND_SOC_DAPM_PRE_PMU |