diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..73ab934
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,353 @@
+Includes modifications licensed under:
+
+Copyright (c) 2019, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
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+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   =========================================================================
+   ==  NOTICE file corresponding to the section 4 d of                    ==
+   ==  the Apache License, Version 2.0,                                   ==
+   ==  in this case for the Android-specific code.                        ==
+   =========================================================================
+
+Android Code
+Copyright 2005-2008 The Android Open Source Project
+
+This product includes software developed as part of
+The Android Open Source Project (http://source.android.com).
+
+   =========================================================================
+   ==  NOTICE file corresponding to the section 4 d of                    ==
+   ==  the Apache License, Version 2.0,                                   ==
+   ==  in this case for Apache Commons code.                              ==
+   =========================================================================
+
+Apache Commons
+Copyright 1999-2006 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
+
+   =========================================================================
+   ==  NOTICE file corresponding to the section 4 d of                    ==
+   ==  the Apache License, Version 2.0,                                   ==
+   ==  in this case for Jakarta Commons Logging.                          ==
+   =========================================================================
+
+Jakarta Commons Logging (JCL)
+Copyright 2005,2006 The Apache Software Foundation.
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
+
+   =========================================================================
+   ==  NOTICE file corresponding to the section 4 d of                    ==
+   ==  the Apache License, Version 2.0,                                   ==
+   ==  in this case for the Nuance code.                                  ==
+   =========================================================================
+
+These files are Copyright 2007 Nuance Communications, but released under
+the Apache2 License.
+
+   =========================================================================
+   ==  NOTICE file corresponding to the section 4 d of                    ==
+   ==  the Apache License, Version 2.0,                                   ==
+   ==  in this case for the Media Codecs code.                            ==
+   =========================================================================
+
+Media Codecs
+These files are Copyright 1998 - 2009 PacketVideo, but released under
+the Apache2 License.
+
+   =========================================================================
+   ==  NOTICE file corresponding to the section 4 d of                    ==
+   ==  the Apache License, Version 2.0,                                   ==
+   ==  in this case for the TagSoup code.                                 ==
+   =========================================================================
+
+This file is part of TagSoup and is Copyright 2002-2008 by John Cowan.
+
+TagSoup is licensed under the Apache License,
+Version 2.0.  You may obtain a copy of this license at
+http://www.apache.org/licenses/LICENSE-2.0 .  You may also have
+additional legal rights not granted by this license.
+
+TagSoup is distributed in the hope that it will be useful, but
+unless required by applicable law or agreed to in writing, TagSoup
+is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
+OF ANY KIND, either express or implied; not even the implied warranty
+of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+   =========================================================================
+   ==  NOTICE file corresponding to the section 4 d of                    ==
+   ==  the Apache License, Version 2.0,                                   ==
+   ==  in this case for Additional Codecs code.                           ==
+   =========================================================================
+
+Additional Codecs
+These files are Copyright 2003-2010 VisualOn, but released under
+the Apache2 License.
+
+  =========================================================================
+  ==  NOTICE file corresponding to the section 4 d of                    ==
+  ==  the Apache License, Version 2.0,                                   ==
+  ==  in this case for the Audio Effects code.                           ==
+  =========================================================================
+
+Audio Effects
+These files are Copyright (C) 2004-2010 NXP Software and
+Copyright (C) 2010 The Android Open Source Project, but released under
+the Apache2 License.
+
+
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+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
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+
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
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+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
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+   6. Trademarks. This License does not grant permission to use the trade
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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diff --git a/configs/common/bluetooth_qti_audio_policy_configuration.xml b/configs/common/bluetooth_qti_audio_policy_configuration.xml
new file mode 100644
index 0000000..f0b2506
--- /dev/null
+++ b/configs/common/bluetooth_qti_audio_policy_configuration.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Bluetooth Audio HAL Audio Policy Configuration file -->
+<module name="bluetooth_qti" halVersion="2.0">
+    <mixPorts>
+        <!-- A2DP Audio Ports -->
+        <mixPort name="a2dp output" role="source"/>
+        <!-- Hearing AIDs Audio Ports -->
+        <mixPort name="hearing aid output" role="source">
+            <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
+                     samplingRates="24000,16000"
+                     channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+        </mixPort>
+    </mixPorts>
+    <devicePorts>
+        <!-- A2DP Audio Ports -->
+        <devicePort tagName="BT A2DP Out" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP" role="sink">
+            <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
+                     samplingRates="44100,48000,88200,96000"
+                     channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+        </devicePort>
+        <devicePort tagName="BT A2DP Headphones" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES" role="sink">
+            <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
+                     samplingRates="44100,48000,88200,96000"
+                     channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+        </devicePort>
+        <devicePort tagName="BT A2DP Speaker" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER" role="sink">
+            <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
+                     samplingRates="44100,48000,88200,96000"
+                     channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+        </devicePort>
+        <!-- Hearing AIDs Audio Ports -->
+        <devicePort tagName="BT Hearing Aid Out" type="AUDIO_DEVICE_OUT_HEARING_AID" role="sink"/>
+    </devicePorts>
+    <routes>
+        <route type="mix" sink="BT A2DP Out"
+               sources="a2dp output"/>
+        <route type="mix" sink="BT A2DP Headphones"
+               sources="a2dp output"/>
+        <route type="mix" sink="BT A2DP Speaker"
+               sources="a2dp output"/>
+        <route type="mix" sink="BT Hearing Aid Out"
+               sources="hearing aid output"/>
+    </routes>
+</module>
diff --git a/configs/msm8909/msm8909.mk b/configs/msm8909/msm8909.mk
index e8aaf8a..da96fda 100644
--- a/configs/msm8909/msm8909.mk
+++ b/configs/msm8909/msm8909.mk
@@ -90,11 +90,19 @@
 endif
 PRODUCT_COPY_FILES += \
     $(TOPDIR)hardware/qcom/audio/configs/common/audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_configuration.xml \
-    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/audio_policy_volumes.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_volumes.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/default_volume_tables.xml:$(TARGET_COPY_OUT_VENDOR)/etc/default_volume_tables.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/r_submix_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/r_submix_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/usb_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/usb_audio_policy_configuration.xml
+
+#check for Android P (version 9)
+ifeq ($(PLATFORM_VERSION), 9)
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+else
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)hardware/qcom/audio/configs/common/bluetooth_qti_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+endif
 endif
 
 
diff --git a/configs/msm8937/msm8937.mk b/configs/msm8937/msm8937.mk
index 0c9b27f..e6d9e14 100644
--- a/configs/msm8937/msm8937.mk
+++ b/configs/msm8937/msm8937.mk
@@ -113,11 +113,19 @@
 endif
 PRODUCT_COPY_FILES += \
     $(TOPDIR)hardware/qcom/audio/configs/common/audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_configuration.xml \
-    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/audio_policy_volumes.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_volumes.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/default_volume_tables.xml:$(TARGET_COPY_OUT_VENDOR)/etc/default_volume_tables.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/r_submix_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/r_submix_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/usb_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/usb_audio_policy_configuration.xml
+
+#check for Android P (version 9)
+ifeq ($(PLATFORM_VERSION), 9)
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+else
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)hardware/qcom/audio/configs/common/bluetooth_qti_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+endif
 endif
 
 # Reduce client buffer size for fast audio output tracks
diff --git a/configs/msm8953/msm8953.mk b/configs/msm8953/msm8953.mk
index b60c56c..2dfa8f7 100644
--- a/configs/msm8953/msm8953.mk
+++ b/configs/msm8953/msm8953.mk
@@ -111,11 +111,19 @@
 endif
 PRODUCT_COPY_FILES += \
     $(TOPDIR)hardware/qcom/audio/configs/common/audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_configuration.xml \
-    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/audio_policy_volumes.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_volumes.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/default_volume_tables.xml:$(TARGET_COPY_OUT_VENDOR)/etc/default_volume_tables.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/r_submix_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/r_submix_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/usb_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/usb_audio_policy_configuration.xml
+
+#check for Android P (version 9)
+ifeq ($(PLATFORM_VERSION), 9)
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+else
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)hardware/qcom/audio/configs/common/bluetooth_qti_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+endif
 endif
 
 # Reduce client buffer size for fast audio output tracks
diff --git a/configs/msm8996/msm8996.mk b/configs/msm8996/msm8996.mk
index fb760c1..3a2c8f2 100644
--- a/configs/msm8996/msm8996.mk
+++ b/configs/msm8996/msm8996.mk
@@ -93,11 +93,19 @@
 endif
 PRODUCT_COPY_FILES += \
     $(TOPDIR)hardware/qcom/audio/configs/common/audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_configuration.xml \
-    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/audio_policy_volumes.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_volumes.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/default_volume_tables.xml:$(TARGET_COPY_OUT_VENDOR)/etc/default_volume_tables.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/r_submix_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/r_submix_audio_policy_configuration.xml \
     $(TOPDIR)frameworks/av/services/audiopolicy/config/usb_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/usb_audio_policy_configuration.xml
+
+#check for Android P (version 9)
+ifeq ($(PLATFORM_VERSION), 9)
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)frameworks/av/services/audiopolicy/config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+else
+PRODUCT_COPY_FILES += \
+    $(TOPDIR)hardware/qcom/audio/configs/common/bluetooth_qti_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml
+endif
 endif
 
 # Listen configuration file
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 1638a22..3181a82 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -6815,6 +6815,8 @@
     int val;
     int ret;
     int status = 0;
+    struct listnode *node;
+    struct audio_usecase *usecase = NULL;
 
     ALOGD("%s: enter: %s", __func__, kvpairs);
     parms = str_parms_create_str(kvpairs);
@@ -6822,16 +6824,30 @@
     if (!parms)
         goto error;
 
+    pthread_mutex_lock(&adev->lock);
     ret = str_parms_get_str(parms, "BT_SCO", value, sizeof(value));
     if (ret >= 0) {
         /* When set to false, HAL should disable EC and NS */
-        if (strcmp(value, AUDIO_PARAMETER_VALUE_ON) == 0)
+        if (strcmp(value, AUDIO_PARAMETER_VALUE_ON) == 0){
             adev->bt_sco_on = true;
-        else
+        } else {
+            ALOGD("route device to handset/mic when sco is off");
             adev->bt_sco_on = false;
+            list_for_each(node, &adev->usecase_list) {
+                usecase = node_to_item(node, struct audio_usecase, list);
+                if ((usecase->type == PCM_PLAYBACK) && usecase->stream.out &&
+                    (usecase->stream.out->devices & AUDIO_DEVICE_OUT_ALL_SCO))
+                    usecase->stream.out->devices = AUDIO_DEVICE_OUT_EARPIECE;
+                else if ((usecase->type == PCM_CAPTURE) && usecase->stream.in &&
+                         (usecase->stream.in->device & AUDIO_DEVICE_IN_ALL_SCO))
+                    usecase->stream.in->device = AUDIO_DEVICE_IN_BUILTIN_MIC;
+                else
+                    continue;
+                select_devices(adev, usecase->id);
+            }
+        }
     }
 
-    pthread_mutex_lock(&adev->lock);
     status = voice_set_parameters(adev, parms);
     if (status != 0)
         goto done;
@@ -7108,7 +7124,9 @@
     if (adev->mode != mode) {
         ALOGD("%s: mode %d\n", __func__, mode);
         adev->mode = mode;
-        if ((mode == AUDIO_MODE_NORMAL) && voice_is_in_call(adev)) {
+        if (voice_is_in_call(adev) &&
+            (mode == AUDIO_MODE_NORMAL ||
+             (mode == AUDIO_MODE_IN_COMMUNICATION && !voice_is_call_state_active(adev)))) {
             list_for_each(node, &adev->usecase_list) {
                 usecase = node_to_item(node, struct audio_usecase, list);
                 if (usecase->type == VOICE_CALL)
diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index c0dc4ff..18aeb13 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -2544,8 +2544,6 @@
         strdup("SLIM_0_RX Format");
     my_data->current_backend_cfg[DEFAULT_CODEC_BACKEND].samplerate_mixer_ctl =
         strdup("SLIM_0_RX SampleRate");
-    my_data->current_backend_cfg[DEFAULT_CODEC_BACKEND].channels_mixer_ctl =
-        strdup("SLIM_0_RX Channels");
 
     my_data->current_backend_cfg[DSD_NATIVE_BACKEND].bitwidth_mixer_ctl =
         strdup("SLIM_2_RX Format");