From 5a7d061dca415124e3ef9a26ff01183b540251bc Mon Sep 17 00:00:00 2001
From: Andy Hung <hunga@google.com>
Date: Mon, 5 Dec 2022 13:55:31 -0800
Subject: [PATCH] sm7125-common: audio: Set minimum Binder access priority

Use setMinSchedulerPolicy to enforce minimum thread priority
when accessing the audio HAL to ANDROID_PRIORITY_AUDIO

Test: instrumented
Bug: 261496726
Change-Id: I700b04d3060e9405b1445206882a6131cea0d045
---
 audio/impl/Device.cpp         | 3 +++
 audio/impl/DevicesFactory.cpp | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/audio/impl/Device.cpp b/audio/impl/Device.cpp
index 6e55e7b..ae015a3 100644
--- a/audio/impl/Device.cpp
+++ b/audio/impl/Device.cpp
@@ -30,6 +30,7 @@
 #include <algorithm>
 
 #include <android/log.h>
+#include <hidl/HidlTransportSupport.h>
 #include <mediautils/MemoryLeakTrackUtil.h>
 #include <memunreachable/memunreachable.h>
 
@@ -183,6 +184,7 @@ std::tuple<Result, sp<IStreamOut>> Device::openOutputStreamCore(int32_t ioHandle
     if (status == OK) {
         streamOut = new StreamOut(this, halStream);
         ++mOpenedStreamsCount;
+        android::hardware::setMinSchedulerPolicy(streamOut, SCHED_NORMAL, ANDROID_PRIORITY_AUDIO);
     }
     status_t convertStatus =
             HidlUtils::audioConfigFromHal(halConfig, false /*isInput*/, suggestedConfig);
@@ -220,6 +222,7 @@ std::tuple<Result, sp<IStreamIn>> Device::openInputStreamCore(
     if (status == OK) {
         streamIn = new StreamIn(this, halStream);
         ++mOpenedStreamsCount;
+        android::hardware::setMinSchedulerPolicy(streamIn, SCHED_NORMAL, ANDROID_PRIORITY_AUDIO);
     }
     status_t convertStatus =
             HidlUtils::audioConfigFromHal(halConfig, true /*isInput*/, suggestedConfig);
diff --git a/audio/impl/DevicesFactory.cpp b/audio/impl/DevicesFactory.cpp
index f44daf0..011f9ac 100644
--- a/audio/impl/DevicesFactory.cpp
+++ b/audio/impl/DevicesFactory.cpp
@@ -23,6 +23,8 @@
 #include <string.h>
 
 #include <android/log.h>
+#include <hidl/HidlTransportSupport.h>
+#include <system/thread_defs.h>
 
 namespace android {
 namespace hardware {
@@ -103,6 +105,7 @@ Return<void> DevicesFactory::openDevice(const char* moduleName, Callback _hidl_c
     int halStatus = loadAudioInterface(moduleName, &halDevice);
     if (halStatus == OK) {
         result = new DeviceShim(halDevice);
+        android::hardware::setMinSchedulerPolicy(result, SCHED_NORMAL, ANDROID_PRIORITY_AUDIO);
         retval = Result::OK;
     } else if (halStatus == -EINVAL) {
         retval = Result::NOT_INITIALIZED;