From 371bc828557989bf81e0eedd2a2907f810ea75f6 Mon Sep 17 00:00:00 2001
From: Arthur Ishiguro <arthuri@google.com>
Date: Thu, 14 Sep 2023 23:31:27 +0000
Subject: [PATCH] Revert "Increase HidRawSensor thread priority to reduce
 latency"

This reverts commit ae23e944243d531eaba31581cc33b0b49ffeb622.

Reason for revert: Possible culprit of b/300512496

Change-Id: Ia99167aa9c979e8afa69ce64f27d535c9228e414
---
 .../sensors/dynamic_sensor/HidRawSensorDevice.cpp    | 12 +-----------
 modules/sensors/dynamic_sensor/HidRawSensorDevice.h  |  1 -
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/modules/sensors/dynamic_sensor/HidRawSensorDevice.cpp b/modules/sensors/dynamic_sensor/HidRawSensorDevice.cpp
index 5bc4abc2..8aa4cf92 100644
--- a/modules/sensors/dynamic_sensor/HidRawSensorDevice.cpp
+++ b/modules/sensors/dynamic_sensor/HidRawSensorDevice.cpp
@@ -35,15 +35,6 @@ using namespace Hid::Sensor::PropertyUsage;
 const std::unordered_set<unsigned int> HidRawSensorDevice::sInterested{
         ACCELEROMETER_3D, GYROMETER_3D, COMPASS_3D, CUSTOM};
 
-void HidRawSensorDevice::enableSchedFifoMode() {
-  constexpr int kHidRawSensorPriority = 10;  // Matches with sensor service priority
-  struct sched_param param = {0};
-  param.sched_priority = kHidRawSensorPriority;
-  if (sched_setscheduler(getTid(), SCHED_FIFO | SCHED_RESET_ON_FORK, &param) != 0) {
-    ALOGE("Couldn't set SCHED_FIFO for HidRawSensor thread: %s", strerror(errno));
-  }
-}
-
 sp<HidRawSensorDevice> HidRawSensorDevice::create(const std::string &devName) {
     sp<HidRawSensorDevice> device(new HidRawSensorDevice(devName));
     // offset +1 strong count added by constructor
@@ -83,8 +74,7 @@ HidRawSensorDevice::HidRawSensorDevice(const std::string &devName)
         return;
     }
 
-    run("HidRawSensor", PRIORITY_URGENT_DISPLAY);
-    enableSchedFifoMode();
+    run("HidRawSensor");
     mValid = true;
 }
 
diff --git a/modules/sensors/dynamic_sensor/HidRawSensorDevice.h b/modules/sensors/dynamic_sensor/HidRawSensorDevice.h
index 7818bf16..06d435e7 100644
--- a/modules/sensors/dynamic_sensor/HidRawSensorDevice.h
+++ b/modules/sensors/dynamic_sensor/HidRawSensorDevice.h
@@ -41,7 +41,6 @@ private:
 
     // constructor will result in +1 strong count
     explicit HidRawSensorDevice(const std::string &devName);
-    void enableSchedFifoMode();
     // implement function of Thread
     virtual bool threadLoop() override;
     std::unordered_map<unsigned int/*reportId*/, sp<HidRawSensor>> mSensors;