ASoC: Add DTMF support for Audio usecase

Add  support to route DTMF source AFE port 
to any other RX port. this support is already 
present  during voice call. This change adds t
same support during audio usecase.

Change-Id: I78fa1049e04de6d7af535929beac209f4c8bc1c6
Signed-off-by: Jhansi Konathala <[email protected]>

asoc/msm-pcm-routing-v2.c

@@ -2046,7 +2046,13 @@ static void msm_pcm_routing_process_audio(u16 reg, u16 val, int set)
 
 	pr_debug("%s: reg %x val %x set %x\n", __func__, reg, val, set);
 
-	if (!is_mm_lsm_fe_id(val)) {
+	if (val == MSM_FRONTEND_DAI_DTMF_RX &&
+		afe_get_port_type(msm_bedais[reg].port_id) ==
+			MSM_AFE_PORT_TYPE_RX) {
+		pr_debug("%s(): set=%d port id=0x%x for dtmf generation\n",
+			__func__, set, msm_bedais[reg].port_id);
+		afe_set_dtmf_gen_rx_portid(msm_bedais[reg].port_id, set);
+	} else if (!is_mm_lsm_fe_id(val)) {
 		/* recheck FE ID in the mixer control defined in this file */
 		pr_err("%s: bad MM ID\n", __func__);
 		return;
@@ -7025,7 +7031,10 @@ static const struct snd_kcontrol_new primary_mi2s_rx_mixer_controls[] = {
 	MSM_BACKEND_DAI_PRI_MI2S_RX,
 	MSM_FRONTEND_DAI_MULTIMEDIA30, 1, 0, msm_routing_get_audio_mixer,
 	msm_routing_put_audio_mixer),
-
+	SOC_DOUBLE_EXT("DTMF", SND_SOC_NOPM,
+	MSM_BACKEND_DAI_PRI_MI2S_RX,
+	MSM_FRONTEND_DAI_DTMF_RX, 1, 0, msm_routing_get_audio_mixer,
+	msm_routing_put_audio_mixer),
 };
 
 static const struct snd_kcontrol_new int0_mi2s_rx_mixer_controls[] = {
@@ -24865,6 +24874,7 @@ static const struct snd_soc_dapm_route intercon[] = {
 	{"PRI_MI2S_RX Audio Mixer", "MultiMedia16", "MM_DL16"},
 	{"PRI_MI2S_RX Audio Mixer", "MultiMedia26", "MM_DL26"},
 	{"PRI_MI2S_RX", NULL, "PRI_MI2S_RX Audio Mixer"},
+	{"PRI_MI2S_RX Audio Mixer", "DTMF", "DTMF_DL_HL"},
 
 	{"INT0_MI2S_RX Audio Mixer", "MultiMedia1", "MM_DL1"},
 	{"INT0_MI2S_RX Audio Mixer", "MultiMedia2", "MM_DL2"},