diff --git a/configs/msm8937/msm8937.mk b/configs/msm8937/msm8937.mk
index 7e5c90f..b7a7a39 100644
--- a/configs/msm8937/msm8937.mk
+++ b/configs/msm8937/msm8937.mk
@@ -46,7 +46,7 @@
 MM_AUDIO_ENABLED_SAFX := true
 TARGET_USES_QCOM_MM_AUDIO := true
 AUDIO_FEATURE_ENABLED_HW_ACCELERATED_EFFECTS := false
-#AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
+AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
 AUDIO_FEATURE_ENABLED_SOURCE_TRACKING := true
 AUDIO_FEATURE_ENABLED_AUDIOSPHERE := true
 ##AUDIO_FEATURE_FLAGS
diff --git a/configs/msm8953/msm8953.mk b/configs/msm8953/msm8953.mk
index 2917f9d..3106942 100644
--- a/configs/msm8953/msm8953.mk
+++ b/configs/msm8953/msm8953.mk
@@ -46,7 +46,8 @@
 MM_AUDIO_ENABLED_SAFX := true
 TARGET_USES_QCOM_MM_AUDIO := true
 AUDIO_FEATURE_ENABLED_HW_ACCELERATED_EFFECTS := false
-#AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
+AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
+
 AUDIO_FEATURE_ENABLED_SOURCE_TRACKING := true
 AUDIO_FEATURE_ENABLED_AUDIOSPHERE := true
 
diff --git a/configs/msm8996/msm8996.mk b/configs/msm8996/msm8996.mk
index 306fa97..5b240e9 100644
--- a/configs/msm8996/msm8996.mk
+++ b/configs/msm8996/msm8996.mk
@@ -46,8 +46,8 @@
 MM_AUDIO_ENABLED_SAFX := true
 TARGET_USES_QCOM_MM_AUDIO := true
 AUDIO_FEATURE_ENABLED_HW_ACCELERATED_EFFECTS := false
-#AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
-#DOLBY_DDP := true
+AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
+
 AUDIO_FEATURE_ENABLED_SOURCE_TRACKING := true
 AUDIO_FEATURE_ENABLED_AUDIOSPHERE := true
 AUDIO_FEATURE_ENABLED_GEF_SUPPORT := true
diff --git a/configs/msmcobalt/msmcobalt.mk b/configs/msmcobalt/msmcobalt.mk
index 9aa0322..b7684ed 100644
--- a/configs/msmcobalt/msmcobalt.mk
+++ b/configs/msmcobalt/msmcobalt.mk
@@ -22,8 +22,7 @@
 AUDIO_FEATURE_ENABLED_HDMI_PASSTHROUGH := true
 #AUDIO_FEATURE_ENABLED_KEEP_ALIVE := true
 AUDIO_FEATURE_ENABLED_DISPLAY_PORT := true
-#AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
-#DOLBY_DDP := true
+AUDIO_FEATURE_ENABLED_DS2_DOLBY_DAP := true
 AUDIO_FEATURE_ENABLED_HFP := true
 AUDIO_FEATURE_ENABLED_INCALL_MUSIC := false
 AUDIO_FEATURE_ENABLED_MULTI_VOICE_SESSIONS := true
diff --git a/hal/audio_extn/a2dp.c b/hal/audio_extn/a2dp.c
index e72cb76..28d0f75 100644
--- a/hal/audio_extn/a2dp.c
+++ b/hal/audio_extn/a2dp.c
@@ -645,6 +645,35 @@
     return ret;
 }
 
+static void reset_a2dp_enc_config_params()
+{
+    int ret =0;
+
+    struct mixer_ctl *ctl_enc_config, *ctrl_bit_format;
+    struct sbc_enc_cfg_t dummy_reset_config;
+
+    memset(&dummy_reset_config, 0x0, sizeof(struct sbc_enc_cfg_t));
+    ctl_enc_config = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                           MIXER_ENC_CONFIG_BLOCK);
+    if (!ctl_enc_config) {
+        ALOGE(" ERROR  a2dp encoder format mixer control not identifed");
+    } else {
+        ret = mixer_ctl_set_array(ctl_enc_config, (void *)&dummy_reset_config,
+                                        sizeof(struct sbc_enc_cfg_t));
+         a2dp.bt_encoder_format = ENC_MEDIA_FMT_NONE;
+    }
+    ctrl_bit_format = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_ENC_BIT_FORMAT);
+    if (!ctrl_bit_format) {
+        ALOGE(" ERROR  bit format CONFIG data mixer control not identifed");
+    } else {
+        ret = mixer_ctl_set_enum_by_string(ctrl_bit_format, "S16_LE");
+        if (ret != 0) {
+            ALOGE("%s: Failed to set bit format to encoder", __func__);
+        }
+    }
+}
+
 int audio_extn_a2dp_stop_playback()
 {
     int ret =0;
@@ -659,35 +688,13 @@
         a2dp.a2dp_total_active_session_request--;
 
     if ( a2dp.a2dp_started && !a2dp.a2dp_total_active_session_request) {
-        struct mixer_ctl *ctl_enc_config, *ctrl_bit_format;
-        struct sbc_enc_cfg_t dummy_reset_config;
-
         ALOGV("calling BT module stream stop");
         ret = a2dp.audio_stop_stream();
         if (ret < 0)
             ALOGE("stop stream to BT IPC lib failed");
         else
             ALOGV("stop steam to BT IPC lib successful");
-         memset(&dummy_reset_config, 0x0, sizeof(struct sbc_enc_cfg_t));
-        ctl_enc_config = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                               MIXER_ENC_CONFIG_BLOCK);
-        if (!ctl_enc_config) {
-            ALOGE(" ERROR  a2dp encoder format mixer control not identifed");
-        } else {
-            ret = mixer_ctl_set_array(ctl_enc_config, (void *)&dummy_reset_config,
-                                            sizeof(struct sbc_enc_cfg_t));
-             a2dp.bt_encoder_format = ENC_MEDIA_FMT_NONE;
-        }
-        ctrl_bit_format = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                                MIXER_ENC_BIT_FORMAT);
-        if (!ctrl_bit_format) {
-            ALOGE(" ERROR  bit format CONFIG data mixer control not identifed");
-        } else {
-            ret = mixer_ctl_set_enum_by_string(ctrl_bit_format, "S16_LE");
-            if (ret != 0) {
-                ALOGE("%s: Failed to set bit format to encoder", __func__);
-            }
-        }
+        reset_a2dp_enc_config_params();
     }
     if(!a2dp.a2dp_total_active_session_request)
        a2dp.a2dp_started = false;
@@ -724,6 +731,7 @@
          val = atoi(value);
          if (val & AUDIO_DEVICE_OUT_ALL_A2DP) {
              ALOGV("Received device dis- connect request");
+             reset_a2dp_enc_config_params();
              close_a2dp_output();
          }
          goto param_handled;
@@ -735,6 +743,7 @@
              if ((!strncmp(value,"true",sizeof(value)))) {
                 ALOGD("Setting a2dp to suspend state");
                 a2dp.a2dp_suspended = true;
+                reset_a2dp_enc_config_params();
                 if(a2dp.audio_suspend_stream)
                    a2dp.audio_suspend_stream();
             } else if (a2dp.a2dp_suspended == true) {
diff --git a/hal/audio_extn/audio_extn.c b/hal/audio_extn/audio_extn.c
index 083b925..0f38b82 100644
--- a/hal/audio_extn/audio_extn.c
+++ b/hal/audio_extn/audio_extn.c
@@ -185,7 +185,7 @@
     return ret;
 }
 
-static void check_and_set_ext_disp_connection_status(const struct audio_device *adev,
+static void audio_extn_ext_disp_set_parameters(const struct audio_device *adev,
                                                      struct str_parms *parms)
 {
     char value[32] = {0};
@@ -204,13 +204,14 @@
             && (atoi(value) & AUDIO_DEVICE_OUT_AUX_DIGITAL)){
         //params = "disconnect=1024" for external display disconnection.
         update_ext_disp_sysfs_node(adev, 0);
+        ALOGV("invalidate cached edid");
+        platform_invalidate_hdmi_config(adev->platform);
     } else {
         // handle ext disp devices only
         return;
     }
 }
 
-
 #ifndef FM_POWER_OPT
 #define audio_extn_fm_set_parameters(adev, parms) (0)
 #else
@@ -772,7 +773,7 @@
    audio_extn_source_track_set_parameters(adev, parms);
    audio_extn_fbsp_set_parameters(parms);
    audio_extn_keep_alive_set_parameters(adev, parms);
-   check_and_set_ext_disp_connection_status(adev, parms);
+   audio_extn_ext_disp_set_parameters(adev, parms);
    if (adev->offload_effects_set_parameters != NULL)
        adev->offload_effects_set_parameters(parms);
 }
@@ -1144,3 +1145,52 @@
     }
 }
 #endif /* KPI_OPTIMIZE_ENABLED */
+
+static int audio_extn_set_multichannel_mask(struct audio_device *adev,
+                                            struct stream_in *in,
+                                            struct audio_config *config,
+                                            bool *channel_mask_updated)
+{
+    int ret = -EINVAL;
+    int channel_count = audio_channel_count_from_in_mask(in->channel_mask);
+    *channel_mask_updated = false;
+
+    int max_mic_count = platform_get_max_mic_count(adev->platform);
+    /* validate input params*/
+    if ((channel_count == 6) &&
+        (in->format == AUDIO_FORMAT_PCM_16_BIT)) {
+
+        switch (max_mic_count) {
+            case 4:
+                config->channel_mask = AUDIO_CHANNEL_INDEX_MASK_4;
+                break;
+            case 3:
+                config->channel_mask = AUDIO_CHANNEL_INDEX_MASK_3;
+                break;
+            case 2:
+                config->channel_mask = AUDIO_CHANNEL_IN_STEREO;
+                break;
+            default:
+                config->channel_mask = AUDIO_CHANNEL_IN_STEREO;
+                break;
+        }
+        ret = 0;
+        *channel_mask_updated = true;
+    }
+    return ret;
+}
+
+int audio_extn_check_and_set_multichannel_usecase(struct audio_device *adev,
+                                                  struct stream_in *in,
+                                                  struct audio_config *config,
+                                                  bool *update_params)
+{
+    bool ssr_supported = false;
+    ssr_supported = audio_extn_ssr_check_usecase(in);
+    if (ssr_supported) {
+        return audio_extn_ssr_set_usecase(in, config, update_params);
+    } else {
+        return audio_extn_set_multichannel_mask(adev, in, config,
+                                                update_params);
+    }
+}
diff --git a/hal/audio_extn/audio_extn.h b/hal/audio_extn/audio_extn.h
index cd9763e..07714f6 100644
--- a/hal/audio_extn/audio_extn.h
+++ b/hal/audio_extn/audio_extn.h
@@ -194,17 +194,21 @@
 #endif
 
 #ifndef SSR_ENABLED
-#define audio_extn_ssr_check_and_set_usecase(in)      (-1)
-#define audio_extn_ssr_init(in, num_out_chan)         (0)
-#define audio_extn_ssr_deinit()                       (0)
-#define audio_extn_ssr_update_enabled()               (0)
-#define audio_extn_ssr_get_enabled()                  (0)
-#define audio_extn_ssr_read(stream, buffer, bytes)    (0)
-#define audio_extn_ssr_set_parameters(adev, parms)    (0)
-#define audio_extn_ssr_get_parameters(adev, parms, reply) (0)
-#define audio_extn_ssr_get_stream()                   (0)
+#define audio_extn_ssr_check_usecase(in)                                  (0)
+#define audio_extn_ssr_set_usecase(in, config, channel_mask_updated)      (0)
+#define audio_extn_ssr_init(in, num_out_chan)                             (0)
+#define audio_extn_ssr_deinit()                                           (0)
+#define audio_extn_ssr_update_enabled()                                   (0)
+#define audio_extn_ssr_get_enabled()                                      (0)
+#define audio_extn_ssr_read(stream, buffer, bytes)                        (0)
+#define audio_extn_ssr_set_parameters(adev, parms)                        (0)
+#define audio_extn_ssr_get_parameters(adev, parms, reply)                 (0)
+#define audio_extn_ssr_get_stream()                                       (0)
 #else
-int audio_extn_ssr_check_and_set_usecase(struct stream_in *in);
+bool audio_extn_ssr_check_usecase(struct stream_in *in);
+int audio_extn_ssr_set_usecase(struct stream_in *in,
+                                         struct audio_config *config,
+                                         bool *channel_mask_updated);
 int32_t audio_extn_ssr_init(struct stream_in *in,
                             int num_out_chan);
 int32_t audio_extn_ssr_deinit();
@@ -219,6 +223,10 @@
                                    struct str_parms *reply);
 struct stream_in *audio_extn_ssr_get_stream();
 #endif
+int audio_extn_check_and_set_multichannel_usecase(struct audio_device *adev,
+                                                  struct stream_in *in,
+                                                  struct audio_config *config,
+                                                  bool *update_params);
 
 #ifndef HW_VARIANTS_ENABLED
 #define hw_info_init(snd_card_name)                      (0)
diff --git a/hal/audio_extn/dolby.c b/hal/audio_extn/dolby.c
index f07c66a..b958bf6 100644
--- a/hal/audio_extn/dolby.c
+++ b/hal/audio_extn/dolby.c
@@ -484,9 +484,7 @@
 };
 
 int audio_extn_dap_hal_init(int snd_card) {
-    char c_dmid[128] = {0};
-    void *handle = NULL;
-    int i_dmid, ret = -EINVAL;
+    int ret = -EINVAL;
     dap_hal_device_be_id_map_t device_be_id_map;
 
     ALOGV("%s: opening DAP HAL lib\n", __func__);
@@ -532,9 +530,7 @@
 void audio_extn_dolby_ds2_set_endpoint(struct audio_device *adev) {
     struct listnode *node;
     struct audio_usecase *usecase;
-    struct mixer_ctl *ctl;
-    const char *mixer_ctl_name = "DS1 DAP Endpoint";
-    int endpoint = 0, ret;
+    int endpoint = 0;
     bool send = false;
 
     list_for_each(node, &adev->usecase_list) {
@@ -587,7 +583,7 @@
     return 0;
 }
 
-int audio_extn_dolby_set_dap_bypass(struct audio_device *adev, int state) {
+int audio_extn_dolby_set_dap_bypass(struct audio_device *adev __unused, int state) {
 
     ALOGV("%s: state %d", __func__, state);
     if (ds2extnmod.dap_hal_set_hw_info) {
@@ -599,12 +595,12 @@
     return 0;
 }
 
-void audio_extn_dolby_set_license(struct audio_device *adev)
+void audio_extn_dolby_set_license(struct audio_device *adev __unused)
 {
     int i_key=0;
     char c_key[128] = {0};
     char c_dmid[128] = {0};
-    int i_dmid, ret = -EINVAL;
+    int i_dmid;
     struct dolby_param_license dolby_license;
 
 #ifdef DOLBY_ACDB_LICENSE
@@ -631,7 +627,7 @@
 void audio_extn_ds2_set_parameters(struct audio_device *adev,
                                    struct str_parms *parms)
 {
-    int val, ret;
+    int ret;
     char value[32]={0};
 
     ret = str_parms_get_str(parms, AUDIO_PARAMETER_KEY_SND_CARD_STATUS, value,
diff --git a/hal/audio_extn/ssr.c b/hal/audio_extn/ssr.c
index f55f3ce..51a6a26 100644
--- a/hal/audio_extn/ssr.c
+++ b/hal/audio_extn/ssr.c
@@ -331,33 +331,55 @@
     return false;
 }
 
-int audio_extn_ssr_check_and_set_usecase(struct stream_in *in)
-{
-    int ret = -1;
+bool  audio_extn_ssr_check_usecase(struct stream_in *in) {
+    int ret = false;
     int channel_count = audio_channel_count_from_in_mask(in->channel_mask);
     audio_devices_t devices = in->device;
     audio_source_t source = in->source;
 
-    /* validate input params
-     * only stereo and 5:1 channel config is supported
-     * only AUDIO_DEVICE_IN_BUILTIN_MIC, AUDIO_DEVICE_IN_BACK_MIC supports 3 mics */
-    if (audio_extn_ssr_get_enabled() &&
-           ((channel_count == 2) || (channel_count == 6)) &&
-           ((AUDIO_SOURCE_MIC == source) || (AUDIO_SOURCE_CAMCORDER == source)) &&
-           ((AUDIO_DEVICE_IN_BUILTIN_MIC == devices) || (AUDIO_DEVICE_IN_BACK_MIC == devices)) &&
-           (in->format == AUDIO_FORMAT_PCM_16_BIT)) {
-
-        ALOGD("%s: Found SSR use case starting SSR lib with channel_count :%d",
+    if ((audio_extn_ssr_get_enabled()) &&
+            ((channel_count == 2) || (channel_count == 6)) &&
+            ((AUDIO_SOURCE_MIC == source) || (AUDIO_SOURCE_CAMCORDER == source)) &&
+            ((AUDIO_DEVICE_IN_BUILTIN_MIC == devices) || (AUDIO_DEVICE_IN_BACK_MIC == devices)) &&
+            (in->format == AUDIO_FORMAT_PCM_16_BIT)) {
+        ALOGD("%s: SSR enabled with channel_count :%d",
                       __func__, channel_count);
+        ret = true;
+    }
+    return ret;
+}
 
-        if (!audio_extn_ssr_init(in, channel_count)) {
-            ALOGD("%s: Created SSR session succesfully", __func__);
+int audio_extn_ssr_set_usecase(struct stream_in *in,
+                               struct audio_config *config,
+                               bool *update_params)
+{
+    int ret = -EINVAL;
+    int channel_count = audio_channel_count_from_in_mask(in->channel_mask);
+    audio_channel_representation_t representation =
+                  audio_channel_mask_get_representation(in->channel_mask);
+    *update_params = false;
+
+    if (audio_extn_ssr_check_usecase(in)) {
+
+        if (representation == AUDIO_CHANNEL_REPRESENTATION_INDEX) {
+            /* update params in case channel representation index.
+             * on returning error, flinger will retry with supported representation passed
+             */
+            ALOGD("%s: SSR supports only channel representation position, channel_mask(%#x)"
+                              ,__func__, config->channel_mask);
+            config->channel_mask = AUDIO_CHANNEL_IN_5POINT1;
             ret = 0;
+            *update_params = true;
         } else {
-            ALOGE("%s: Unable to start SSR record session", __func__);
+            if (!audio_extn_ssr_init(in, channel_count)) {
+                ALOGD("%s: Created SSR session succesfully", __func__);
+                ret = 0;
+            } else {
+                ALOGE("%s: Unable to start SSR record session", __func__);
+            }
         }
-   }
-   return ret;
+    }
+    return ret;
 }
 
 static void pcm_buffer_queue_push(struct pcm_buffer_queue **queue,
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 3816748..e82cd51 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -2452,7 +2452,15 @@
                 (val == AUDIO_DEVICE_NONE)) {
                 val = AUDIO_DEVICE_OUT_SPEAKER;
         }
-
+        /* To avoid a2dp to sco overlapping force route BT usecases
+         * to speaker based on Phone state
+         */
+        if ((val & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP) &&
+            ((adev->mode == AUDIO_MODE_RINGTONE) ||
+            (adev->mode == AUDIO_MODE_IN_CALL))) {
+            ALOGD("Forcing a2dp routing to speaker for ring/call mode");
+            val = AUDIO_DEVICE_OUT_SPEAKER;
+        }
         /*
          * select_devices() call below switches all the usecases on the same
          * backend to the new device. Refer to check_usecases_codec_backend() in
@@ -4251,10 +4259,13 @@
     ret = str_parms_get_str(parms, AUDIO_PARAMETER_DEVICE_DISCONNECT, value, sizeof(value));
     if (ret >= 0) {
         val = atoi(value);
-        if (val & AUDIO_DEVICE_OUT_AUX_DIGITAL) {
-            ALOGV("invalidate cached edid");
-            platform_invalidate_hdmi_config(adev->platform);
-        } else if ((val & AUDIO_DEVICE_OUT_USB_DEVICE) ||
+        /*
+         * The HDMI / Displayport disconnect handling has been moved to
+         * audio extension to ensure that its parameters are not
+         * invalidated prior to updating sysfs of the disconnect event
+         * Invalidate will be handled by audio_extn_ext_disp_set_parameters()
+         */
+        if ((val & AUDIO_DEVICE_OUT_USB_DEVICE) ||
                    !(val ^ AUDIO_DEVICE_IN_USB_DEVICE)) {
             ret = str_parms_get_str(parms, "card", value, sizeof(value));
             if (ret >= 0) {
@@ -4440,6 +4451,7 @@
     int ret = 0, buffer_size, frame_size;
     int channel_count = audio_channel_count_from_in_mask(config->channel_mask);
     bool is_low_latency = false;
+    bool channel_mask_updated = false;
 
     *stream_in = NULL;
     if (check_input_parameters(config->sample_rate, config->format, channel_count) != 0) {
@@ -4534,7 +4546,14 @@
         in->config.channels = channel_count;
         in->config.rate = config->sample_rate;
         in->sample_rate = config->sample_rate;
-    } else if (!audio_extn_ssr_check_and_set_usecase(in)) {
+    } else if (!audio_extn_check_and_set_multichannel_usecase(adev,
+                in, config, &channel_mask_updated)) {
+        if (channel_mask_updated == true) {
+            ALOGD("%s: return error to retry with updated channel mask (%#x)",
+                   __func__, config->channel_mask);
+            ret = -EINVAL;
+            goto err_open;
+        }
         ALOGD("%s: created surround sound session succesfully",__func__);
     } else if (audio_extn_compr_cap_enabled() &&
             audio_extn_compr_cap_format_supported(config->format) &&
diff --git a/hal/msm8916/platform.c b/hal/msm8916/platform.c
index a5cc804..0a14629 100644
--- a/hal/msm8916/platform.c
+++ b/hal/msm8916/platform.c
@@ -780,8 +780,8 @@
 static int msm_device_to_be_id_external_codec [][NO_COLS] = {
        {AUDIO_DEVICE_OUT_EARPIECE                       ,       2},
        {AUDIO_DEVICE_OUT_SPEAKER                        ,       2},
-       {AUDIO_DEVICE_OUT_WIRED_HEADSET                  ,       2},
-       {AUDIO_DEVICE_OUT_WIRED_HEADPHONE                ,       2},
+       {AUDIO_DEVICE_OUT_WIRED_HEADSET                  ,       41},
+       {AUDIO_DEVICE_OUT_WIRED_HEADPHONE                ,       41},
        {AUDIO_DEVICE_OUT_BLUETOOTH_SCO                  ,       11},
        {AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET          ,       11},
        {AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT           ,       11},
@@ -2924,6 +2924,7 @@
         *num_devices = 2;
         new_snd_devices[0] = SND_DEVICE_OUT_SPEAKER;
         new_snd_devices[1] = SND_DEVICE_OUT_BT_A2DP;
+        status = true;
     }
 
     ALOGD("%s: snd_device(%d) num devices(%d) new_snd_devices(%d)", __func__,
@@ -5671,3 +5672,8 @@
 {
     return -ENOSYS;
 }
+
+int platform_get_max_mic_count(void *platform) {
+    struct platform_data *my_data = (struct platform_data *)platform;
+    return my_data->max_mic_count;
+}
diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index 71efe9f..f506130 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -795,8 +795,8 @@
 static int msm_device_to_be_id [][NO_COLS] = {
        {AUDIO_DEVICE_OUT_EARPIECE                       ,       2},
        {AUDIO_DEVICE_OUT_SPEAKER                        ,       2},
-       {AUDIO_DEVICE_OUT_WIRED_HEADSET                  ,       2},
-       {AUDIO_DEVICE_OUT_WIRED_HEADPHONE                ,       2},
+       {AUDIO_DEVICE_OUT_WIRED_HEADSET                  ,       41},
+       {AUDIO_DEVICE_OUT_WIRED_HEADPHONE                ,       41},
        {AUDIO_DEVICE_OUT_BLUETOOTH_SCO                  ,       11},
        {AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET          ,       11},
        {AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT           ,       11},
@@ -2742,9 +2742,9 @@
         *num_devices = 2;
         new_snd_devices[0] = SND_DEVICE_OUT_SPEAKER;
         new_snd_devices[1] = SND_DEVICE_OUT_BT_A2DP;
+        status = true;
     }
 
-
     ALOGD("%s: snd_device(%d) num devices(%d) new_snd_devices(%d)", __func__,
         snd_device, *num_devices, *new_snd_devices);
 
@@ -5796,3 +5796,8 @@
 ERROR_RETURN:
     return ret;
 }
+
+int platform_get_max_mic_count(void *platform) {
+    struct platform_data *my_data = (struct platform_data *)platform;
+    return my_data->max_mic_count;
+}
diff --git a/hal/platform_api.h b/hal/platform_api.h
index 7dcd1b6..76d99b3 100644
--- a/hal/platform_api.h
+++ b/hal/platform_api.h
@@ -163,6 +163,7 @@
 bool platform_check_codec_asrc_support(void *platform);
 int platform_get_backend_index(snd_device_t snd_device);
 int platform_get_ext_disp_type(void *platform);
+void platform_invalidate_hdmi_config(void *platform);
 
 int platform_send_audio_cal(void* platform, int acdb_dev_id, int acdb_device_type,
     int app_type, int topology_id, int sample_rate, uint32_t module_id, uint32_t param_id,
@@ -181,4 +182,5 @@
     void* data, int* length);
 
 unsigned char* platform_get_license(void* platform, int* size);
+int platform_get_max_mic_count(void *platform);
 #endif // AUDIO_PLATFORM_API_H
diff --git a/policy_hal/Android.mk b/policy_hal/Android.mk
index 854eaee..f9913c4 100644
--- a/policy_hal/Android.mk
+++ b/policy_hal/Android.mk
@@ -1,3 +1,16 @@
+# This file was modified by Dolby Laboratories, Inc. The portions of the
+# code that are surrounded by "DOLBY..." are copyrighted and
+# licensed separately, as follows:
+#
+# (C)  2016 Dolby Laboratories, Inc.
+# All rights reserved.
+#
+# This program is protected under international and U.S. Copyright laws as
+# an unpublished work. This program is confidential and proprietary to the
+# copyright owners. Reproduction or disclosure, in whole or in part, or the
+# production of derivative works therefrom without the express permission of
+# the copyright owners is prohibited.
+#
 ifneq ($(USE_LEGACY_AUDIO_POLICY), 1)
 ifeq ($(USE_CUSTOM_AUDIO_POLICY), 1)
 LOCAL_PATH := $(call my-dir)
@@ -64,6 +77,11 @@
 ifeq ($(strip $(AUDIO_FEATURE_ENABLED_FM_POWER_OPT)),true)
 LOCAL_CFLAGS += -DFM_POWER_OPT
 endif
+# DOLBY_START
+ifeq ($(strip $(DOLBY_ENABLE)),true)
+LOCAL_CFLAGS += $(dolby_cflags)
+endif
+# DOLBY_END
 
 ifeq ($(USE_XML_AUDIO_POLICY_CONF), 1)
 LOCAL_CFLAGS += -DUSE_XML_AUDIO_POLICY_CONF