asoc: codecs: Add multi input support for display audio mixers

Add multi input support such that display audio
mixer controls can update both control ID and
stream ID to support display audio multi streaming.

Change-Id: Ief8fe852585a31fbe5871ce8ecc1057d6891e2b7
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>
Signed-off-by: Vignesh Kulothungan <vigneshk@codeaurora.org>

asoc/codecs/msm_hdmi_codec_rx.c

@@ -32,6 +32,11 @@
 	msm_ext_disp_select_audio_codec(codec_data->ext_disp_core_pdev, \
 				&codec_info)
 
+enum {
+        DP_CONTROLLER0 = 0,
+        DP_CONTROLLER_MAX,
+};
+
 enum {
 	DP_STREAM0 = 0,
 	DP_STREAM1,
@@ -295,6 +300,38 @@ done:
 	return rc;
 }
 
+static int msm_ext_disp_audio_device_get(struct snd_kcontrol *kcontrol,
+				      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+			snd_soc_kcontrol_component(kcontrol);
+	struct msm_ext_disp_audio_codec_rx_data *codec_data;
+	int rc = 0;
+	int dai_id = ((struct soc_multi_mixer_control *)
+				kcontrol->private_value)->shift;
+
+	if (dai_id < 0 || dai_id > DP_DAI2) {
+		dev_err(component->dev,
+			"%s: invalid dai id: %d\n", __func__, dai_id);
+		rc = -EINVAL;
+		goto done;
+	}
+
+	codec_data = snd_soc_component_get_drvdata(component);
+	if (!codec_data) {
+		dev_err(component->dev,
+			"%s: codec_data or ops acknowledge() is NULL\n",
+			__func__);
+		rc = -EINVAL;
+		goto done;
+	}
+	ucontrol->value.integer.value[0] = codec_data->ctl[dai_id];
+	ucontrol->value.integer.value[1] = codec_data->stream[dai_id];
+
+done:
+	return rc;
+}
+
 static int msm_ext_disp_audio_device_set(struct snd_kcontrol *kcontrol,
 				      struct snd_ctl_elem_value *ucontrol)
 {
@@ -302,7 +339,15 @@ static int msm_ext_disp_audio_device_set(struct snd_kcontrol *kcontrol,
 			snd_soc_kcontrol_component(kcontrol);
 	struct msm_ext_disp_audio_codec_rx_data *codec_data;
 	int rc = 0;
-	int dai_id = ((struct soc_enum *) kcontrol->private_value)->shift_l;
+	int dai_id = ((struct soc_multi_mixer_control *)
+				kcontrol->private_value)->shift;
+
+	if (dai_id < 0 || dai_id > DP_DAI2) {
+		dev_err(component->dev,
+			"%s: invalid dai id: %d\n", __func__, dai_id);
+		rc = -EINVAL;
+		goto done;
+	}
 
 	codec_data = snd_soc_component_get_drvdata(component);
 	if (!codec_data) {
@@ -313,9 +358,20 @@ static int msm_ext_disp_audio_device_set(struct snd_kcontrol *kcontrol,
 		goto done;
 	}
 
+	if ((ucontrol->value.integer.value[0] > (DP_CONTROLLER_MAX - 1)) ||
+		(ucontrol->value.integer.value[1] > (DP_STREAM_MAX - 1)) ||
+		(ucontrol->value.integer.value[0] < 0) ||
+		(ucontrol->value.integer.value[1] < 0)) {
+		dev_err(component->dev,
+			"%s: DP audio control index invalid\n",
+			__func__);
+		rc = -EINVAL;
+		goto done;
+	}
+
 	mutex_lock(&codec_data->dp_ops_lock);
-	codec_data->ctl[dai_id] = ucontrol->value.enumerated.item[0];
-	codec_data->stream[dai_id] = ucontrol->value.enumerated.item[1];
+	codec_data->ctl[dai_id] = ucontrol->value.integer.value[0];
+	codec_data->stream[dai_id] = ucontrol->value.integer.value[1];
 	mutex_unlock(&codec_data->dp_ops_lock);
 
 done:
@@ -363,12 +419,14 @@ static const struct snd_kcontrol_new msm_ext_disp_codec_rx_controls[] = {
 		     ext_disp_audio_ack_state1,
 		     NULL, msm_ext_disp_audio_ack_set),
 
-	SOC_SINGLE_EXT("External Display Audio Device",
-		       SND_SOC_NOPM, DP_DAI1, DP_STREAM_MAX, 0,
-		       NULL, msm_ext_disp_audio_device_set),
-	SOC_SINGLE_EXT("External Display1 Audio Device",
-		       SND_SOC_NOPM, DP_DAI2, DP_STREAM_MAX, 0,
-		       NULL, msm_ext_disp_audio_device_set),
+	SOC_SINGLE_MULTI_EXT("External Display Audio Device",
+			SND_SOC_NOPM, DP_DAI1, DP_STREAM_MAX - 1, 0, 2,
+			msm_ext_disp_audio_device_get,
+			msm_ext_disp_audio_device_set),
+	SOC_SINGLE_MULTI_EXT("External Display1 Audio Device",
+			SND_SOC_NOPM, DP_DAI2, DP_STREAM_MAX - 1, 0, 2,
+			msm_ext_disp_audio_device_get,
+			msm_ext_disp_audio_device_set),
 };
 
 static int msm_ext_disp_audio_codec_rx_dai_startup(