asoc: wcd937x: add dummy widgets to codec input and outputs

With multicodec approach, codec widgets are added much earlier during sound
card registration than aux codec approach. The connections between bolero and wcd938x
are done via device tree at a later point. DAPM does power checkup for codec widgets
before the codec-codec path is connected. This results in wcd937x dapm inputs/output
to be considered as endpoints, which results in playback/record failure once after
bootup. Hence, add dummy output/input widgets to wcd937x dapm inputs/output which are not
codec endpoints.

Change-Id: I8589f9a33261531eaad74e8f12ef1825fa90a014
Signed-off-by: Vangala, Amarnath <[email protected]>

asoc/codecs/wcd937x/wcd937x.c

@@ -2229,6 +2229,14 @@ static const struct snd_soc_dapm_widget wcd937x_dapm_widgets[] = {
 	SND_SOC_DAPM_INPUT("IN2_HPHR"),
 	SND_SOC_DAPM_INPUT("IN3_AUX"),
 
+	/*
+	 * These dummy widgets are null connected to WCD937x dapm input and
+	 * output widgets which are not actual path endpoints. This ensures
+	 * dapm doesnt set these dapm input and output widgets as endpoints.
+	 */
+	SND_SOC_DAPM_INPUT("WCD_TX_DUMMY"),
+	SND_SOC_DAPM_OUTPUT("WCD_RX_DUMMY"),
+
 	/*tx widgets*/
 	SND_SOC_DAPM_ADC_E("ADC1", NULL, SND_SOC_NOPM, 0, 0,
 				wcd937x_codec_enable_adc,
@@ -2439,6 +2447,7 @@ static const struct snd_soc_dapm_widget wcd9375_dapm_widgets[] = {
 };
 
 static const struct snd_soc_dapm_route wcd937x_audio_map[] = {
+	{"WCD_TX_DUMMY", NULL, "WCD_TX_OUTPUT"},
 	{"WCD_TX_OUTPUT", NULL, "ADC1_MIXER"},
 	{"ADC1_MIXER", "Switch", "ADC1 REQ"},
 	{"ADC1 REQ", NULL, "ADC1"},
@@ -2451,6 +2460,7 @@ static const struct snd_soc_dapm_route wcd937x_audio_map[] = {
 	{"ADC2 MUX", "INP3", "AMIC3"},
 	{"ADC2 MUX", "INP2", "AMIC2"},
 
+	{"IN1_HPHL", NULL, "WCD_RX_DUMMY"},
 	{"IN1_HPHL", NULL, "VDD_BUCK"},
 	{"IN1_HPHL", NULL, "CLS_H_PORT"},
 	{"RX1", NULL, "IN1_HPHL"},
@@ -2459,6 +2469,7 @@ static const struct snd_soc_dapm_route wcd937x_audio_map[] = {
 	{"HPHL PGA", NULL, "HPHL_RDAC"},
 	{"HPHL", NULL, "HPHL PGA"},
 
+	{"IN2_HPHR", NULL, "WCD_RX_DUMMY"},
 	{"IN2_HPHR", NULL, "VDD_BUCK"},
 	{"IN2_HPHR", NULL, "CLS_H_PORT"},
 	{"RX2", NULL, "IN2_HPHR"},
@@ -2467,6 +2478,7 @@ static const struct snd_soc_dapm_route wcd937x_audio_map[] = {
 	{"HPHR PGA", NULL, "HPHR_RDAC"},
 	{"HPHR", NULL, "HPHR PGA"},
 
+	{"IN3_AUX", NULL, "WCD_RX_DUMMY"},
 	{"IN3_AUX", NULL, "VDD_BUCK"},
 	{"IN3_AUX", NULL, "CLS_H_PORT"},
 	{"RX3", NULL, "IN3_AUX"},
@@ -2485,6 +2497,7 @@ static const struct snd_soc_dapm_route wcd937x_audio_map[] = {
 
 static const struct snd_soc_dapm_route wcd9375_audio_map[] = {
 
+	{"WCD_TX_DUMMY", NULL, "WCD_TX_OUTPUT"},
 	{"WCD_TX_OUTPUT", NULL, "ADC3_MIXER"},
 	{"ADC3_OUTPUT", NULL, "ADC3_MIXER"},
 	{"ADC3_MIXER", "Switch", "ADC3 REQ"},
@@ -2758,6 +2771,8 @@ static int wcd937x_soc_codec_probe(struct snd_soc_component *component)
 	snd_soc_dapm_ignore_suspend(dapm, "AUX");
 	snd_soc_dapm_ignore_suspend(dapm, "HPHL");
 	snd_soc_dapm_ignore_suspend(dapm, "HPHR");
+	snd_soc_dapm_ignore_suspend(dapm, "WCD_TX_DUMMY");
+	snd_soc_dapm_ignore_suspend(dapm, "WCD_RX_DUMMY");
 	snd_soc_dapm_sync(dapm);
 
 	wcd_cls_h_init(&wcd937x->clsh_info);