From 43966208b7ef50c51a58e82c6d7c10ee9e115860 Mon Sep 17 00:00:00 2001
From: Andy Hung <hunga@google.com>
Date: Mon, 5 Dec 2022 13:55:31 -0800
Subject: audio HAL: 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/core/all-versions/default/Device.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'audio/core/all-versions/default/Device.cpp')

diff --git a/audio/core/all-versions/default/Device.cpp b/audio/core/all-versions/default/Device.cpp
index b954fcd6f8..d03118ae5d 100644
--- a/audio/core/all-versions/default/Device.cpp
+++ b/audio/core/all-versions/default/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);
-- 
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