commit 317a9ed5bac3869b8c241a15887df9769b41aef5
author Mikhail Naganov <mnaganov@google.com> Thu Sep 20 14:25:01 2018 -0700
committer Mikhail Naganov <mnaganov@google.com> Wed Sep 26 10:11:26 2018 -0700
tree dcbfb690569fa1baccd5ec1a287f1733c93d0d7c
parent 218a2bf89b5484d2894172a10a71f2f3a1aa6293

audio: Allow vendors to configure hwbinder RPC buffer size

If persist.vendor.audio.hw.binder.size_kbyte property is set, its
value is used to configure the size of hwbinder's MMap buffer.

Bug: 114776290
Test: set the property, check logcat
Change-Id: Icb6a4d0ebe98eb702201f8a9f0fed3a91a24f7ba

audio/common/all-versions/default/service/Android.mk

diff --git a/audio/common/all-versions/default/service/Android.mk b/audio/common/all-versions/default/service/Android.mk
index 43d7fe1..e6ae03e 100644
--- a/audio/common/all-versions/default/service/Android.mk
+++ b/audio/common/all-versions/default/service/Android.mk
@@ -31,12 +31,14 @@
 LOCAL_CFLAGS := -Wall -Werror
 
 LOCAL_SHARED_LIBRARIES := \
+    libcutils \
     libbinder \
     libhidlbase \
     libhidltransport \
     liblog \
     libutils \
     libhardware \
+    libhwbinder \
     android.hardware.audio@2.0 \
     android.hardware.audio@4.0 \
     android.hardware.audio.common@2.0 \

audio/common/all-versions/default/service/service.cpp

diff --git a/audio/common/all-versions/default/service/service.cpp b/audio/common/all-versions/default/service/service.cpp
index c7ce638..ff1394e 100644
--- a/audio/common/all-versions/default/service/service.cpp
+++ b/audio/common/all-versions/default/service/service.cpp
@@ -24,16 +24,26 @@
 #include <android/hardware/soundtrigger/2.0/ISoundTriggerHw.h>
 #include <android/hardware/soundtrigger/2.1/ISoundTriggerHw.h>
 #include <binder/ProcessState.h>
+#include <cutils/properties.h>
 #include <hidl/HidlTransportSupport.h>
 #include <hidl/LegacySupport.h>
+#include <hwbinder/ProcessState.h>
 
 using namespace android::hardware;
 using android::OK;
 
 int main(int /* argc */, char* /* argv */ []) {
-    android::ProcessState::initWithDriver("/dev/vndbinder");
+    ::android::ProcessState::initWithDriver("/dev/vndbinder");
     // start a threadpool for vndbinder interactions
-    android::ProcessState::self()->startThreadPool();
+    ::android::ProcessState::self()->startThreadPool();
+
+    const int32_t defaultValue = -1;
+    int32_t value =
+        property_get_int32("persist.vendor.audio.service.hwbinder.size_kbyte", defaultValue);
+    if (value != defaultValue) {
+        ALOGD("Configuring hwbinder with mmap size %d KBytes", value);
+        ProcessState::initWithMmapSize(static_cast<size_t>(value) * 1024);
+    }
     configureRpcThreadpool(16, true /*callerWillJoin*/);
 
     bool fail = registerPassthroughServiceImplementation<audio::V4_0::IDevicesFactory>() != OK &&