From a8888f75bba282a1ff9587ee32e0a7379f7fdda1 Mon Sep 17 00:00:00 2001
From: Gary Lin <garylse@google.com>
Date: Thu, 21 Jul 2022 19:35:25 +0800
Subject: Inherit RT scheduling policy from camera device session binder caller

The change inherits RT scheduling policy from binder caller, which reduces scheduling time for request injection.

Bug: 240390679
Test: camera test checklist
Test: GCA framedrop test
Change-Id: If4cad4e790e05ab34f2ef353ad1bcd8327fbe324
---
 common/hal/aidl_service/aidl_camera_device_session.cc | 7 +++++++
 common/hal/aidl_service/aidl_camera_device_session.h  | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/common/hal/aidl_service/aidl_camera_device_session.cc b/common/hal/aidl_service/aidl_camera_device_session.cc
index 9af6de1..49d8282 100644
--- a/common/hal/aidl_service/aidl_camera_device_session.cc
+++ b/common/hal/aidl_service/aidl_camera_device_session.cc
@@ -19,6 +19,7 @@
 //#define LOG_NDEBUG 0
 #include "aidl_camera_device_session.h"
 
+#include <android/binder_ibinder_platform.h>
 #include <cutils/properties.h>
 #include <cutils/trace.h>
 #include <log/log.h>
@@ -798,6 +799,12 @@ ScopedAStatus AidlCameraDeviceSession::isReconfigurationRequired(
   return ScopedAStatus::ok();
 }
 
+::ndk::SpAIBinder AidlCameraDeviceSession::createBinder() {
+  auto binder = BnCameraDeviceSession::createBinder();
+  AIBinder_setInheritRt(binder.get(), true);
+  return binder;
+}
+
 }  // namespace implementation
 }  // namespace device
 }  // namespace camera
diff --git a/common/hal/aidl_service/aidl_camera_device_session.h b/common/hal/aidl_service/aidl_camera_device_session.h
index e14604d..3423d8f 100644
--- a/common/hal/aidl_service/aidl_camera_device_session.h
+++ b/common/hal/aidl_service/aidl_camera_device_session.h
@@ -113,6 +113,9 @@ class AidlCameraDeviceSession : public BnCameraDeviceSession {
 
   AidlCameraDeviceSession() = default;
 
+ protected:
+  ::ndk::SpAIBinder createBinder() override;
+
  private:
   static constexpr uint32_t kRequestMetadataQueueSizeBytes = 1 << 20;  // 1MB
   static constexpr uint32_t kResultMetadataQueueSizeBytes = 1 << 20;   // 1MB
-- 
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