asoc: add support to configure MFC in ec ref path

Add support to process ec at channel count other than the
playback channel count by providing ability to set downmixed
channel count and downmixing weights to be used to downmix
ec ref data obtained from playback path.
These configs would be used to explicitly configure MFC module
present in ec ref path, for usecases where ec processing cannot
be done at playback channel count due to algorithmic or resource
limitations.
Also increase the ec ref channel count support to Sixteen from
current max of Eight.

Change-Id: I2297508aedd177580b1c9b2bed3c7c8421507629
Signed-off-by: Dhananjay Kumar <[email protected]>

asoc/msm-pcm-routing-v2.c

@@ -70,6 +70,7 @@ static int lsm_port_index;
 static int slim0_rx_aanc_fb_port;
 static int msm_route_ec_ref_rx;
 static int msm_ec_ref_ch = 4;
+static int msm_ec_ref_ch_downmixed = 4;
 static int msm_ec_ref_bit_format = SNDRV_PCM_FORMAT_S16_LE;
 static int msm_ec_ref_sampling_rate = 48000;
 static uint32_t voc_session_id = ALL_SESSION_VSID;
@@ -3846,8 +3847,45 @@ static int msm_ec_ref_ch_put(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
+static int msm_ec_ref_ch_downmixed_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.integer.value[0] = msm_ec_ref_ch_downmixed;
+	pr_debug("%s: msm_ec_ref_downmixed_ch = %ld\n", __func__,
+		ucontrol->value.integer.value[0]);
+	return 0;
+}
+
+static int msm_ec_ref_ch_downmixed_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	msm_ec_ref_ch_downmixed = ucontrol->value.integer.value[0];
+	pr_debug("%s: msm_ec_ref_downmixed_ch = %d\n",
+		__func__, msm_ec_ref_ch_downmixed);
+	adm_num_ec_ref_rx_chans_downmixed(msm_ec_ref_ch_downmixed);
+	return 0;
+}
+
+static int msm_ec_ref_chmixer_weights_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	int i = 0, ret = 0;
+	uint16_t weights[PCM_FORMAT_MAX_NUM_CHANNEL_V8] = {0};
+	int out_channel_idx = ((struct soc_multi_mixer_control *)
+				kcontrol->private_value)->shift;
+
+	for (; i < PCM_FORMAT_MAX_NUM_CHANNEL_V8; i++)
+		weights[i] = ucontrol->value.integer.value[i];
+
+	ret = adm_ec_ref_chmixer_weights(out_channel_idx,
+					weights, PCM_FORMAT_MAX_NUM_CHANNEL_V8);
+	pr_debug("%s: ch_index = %d, ret = %d\n", __func__, out_channel_idx, ret);
+	return ret;
+}
+
 static const char *const ec_ref_ch_text[] = {"Zero", "One", "Two", "Three",
-	"Four", "Five", "Six", "Seven", "Eight"};
+	"Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven",
+	"Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen"};
 
 static int msm_ec_ref_bit_format_get(struct snd_kcontrol *kcontrol,
 			       struct snd_ctl_elem_value *ucontrol)
@@ -3952,7 +3990,7 @@ static const char *const ec_ref_rate_text[] = {"0", "8000", "16000",
 	"32000", "44100", "48000", "96000", "192000", "384000"};
 
 static const struct soc_enum msm_route_ec_ref_params_enum[] = {
-	SOC_ENUM_SINGLE_EXT(9, ec_ref_ch_text),
+	SOC_ENUM_SINGLE_EXT(17, ec_ref_ch_text),
 	SOC_ENUM_SINGLE_EXT(3, ec_ref_bit_format_text),
 	SOC_ENUM_SINGLE_EXT(9, ec_ref_rate_text),
 };
@@ -3964,6 +4002,26 @@ static const struct snd_kcontrol_new ec_ref_param_controls[] = {
 		msm_ec_ref_bit_format_get, msm_ec_ref_bit_format_put),
 	SOC_ENUM_EXT("EC Reference SampleRate", msm_route_ec_ref_params_enum[2],
 		msm_ec_ref_rate_get, msm_ec_ref_rate_put),
+	SOC_ENUM_EXT("EC Reference Downmixed Channels", msm_route_ec_ref_params_enum[0],
+		msm_ec_ref_ch_downmixed_get, msm_ec_ref_ch_downmixed_put),
+	SOC_SINGLE_MULTI_EXT("EC Reference ChMixer Weights Ch1", SND_SOC_NOPM, 0,
+		16384, 0, PCM_FORMAT_MAX_NUM_CHANNEL_V8,
+		NULL, msm_ec_ref_chmixer_weights_put),
+	SOC_SINGLE_MULTI_EXT("EC Reference ChMixer Weights Ch2", SND_SOC_NOPM, 1,
+		16384, 0, PCM_FORMAT_MAX_NUM_CHANNEL_V8,
+		NULL, msm_ec_ref_chmixer_weights_put),
+	SOC_SINGLE_MULTI_EXT("EC Reference ChMixer Weights Ch3", SND_SOC_NOPM, 2,
+		16384, 0, PCM_FORMAT_MAX_NUM_CHANNEL_V8,
+		NULL, msm_ec_ref_chmixer_weights_put),
+	SOC_SINGLE_MULTI_EXT("EC Reference ChMixer Weights Ch4", SND_SOC_NOPM, 3,
+		16384, 0, PCM_FORMAT_MAX_NUM_CHANNEL_V8,
+		NULL, msm_ec_ref_chmixer_weights_put),
+	SOC_SINGLE_MULTI_EXT("EC Reference ChMixer Weights Ch5", SND_SOC_NOPM, 4,
+		16384, 0, PCM_FORMAT_MAX_NUM_CHANNEL_V8,
+		NULL, msm_ec_ref_chmixer_weights_put),
+	SOC_SINGLE_MULTI_EXT("EC Reference ChMixer Weights Ch6", SND_SOC_NOPM, 5,
+		16384, 0, PCM_FORMAT_MAX_NUM_CHANNEL_V8,
+		NULL, msm_ec_ref_chmixer_weights_put),
 };
 
 static int msm_routing_ec_ref_rx_get(struct snd_kcontrol *kcontrol,