From fb21bd86a86e5fa8d94b4fc89226e22e9efb86a2 Mon Sep 17 00:00:00 2001
From: Wei Wang <wvw@google.com>
Date: Thu, 10 Jan 2019 14:16:23 -0800
Subject: [PATCH] ThermalManagerservice: add legacy Thermal HAL 1.0 polling
 support

For legacy Thermal HAL 1.0, we cannot get notification but we still can
support the getCurrentTemperatures API.

Bug: 119228310
Test: manually on a device with Thermal HAL 1.0
Test: atest $ANDROID_BUILD_TOP/frameworks/base/services/tests/servicestests/src/com/android/server/power/ThermalManagerServiceTest.java
Change-Id: Ibe1784e4a904393113f8716db4e5af24debcdc8f
---
 Android.bp                                    |  1 +
 .../server/power/ThermalManagerService.java   | 87 ++++++++++++++++++-
 2 files changed, 84 insertions(+), 4 deletions(-)

diff --git a/Android.bp b/Android.bp
index eb9cbbb136f9c..5dc34a582c0f8 100644
--- a/Android.bp
+++ b/Android.bp
@@ -731,6 +731,7 @@ java_defaults {
         "android.hardware.contexthub-V1.0-java",
         "android.hardware.health-V1.0-java-constants",
         "android.hardware.thermal-V1.0-java-constants",
+        "android.hardware.thermal-V1.0-java",
         "android.hardware.thermal-V1.1-java",
         "android.hardware.thermal-V2.0-java",
         "android.hardware.tv.input-V1.0-java-constants",
diff --git a/services/core/java/com/android/server/power/ThermalManagerService.java b/services/core/java/com/android/server/power/ThermalManagerService.java
index 02689a90a98a6..7d03d821d4c87 100644
--- a/services/core/java/com/android/server/power/ThermalManagerService.java
+++ b/services/core/java/com/android/server/power/ThermalManagerService.java
@@ -134,10 +134,14 @@ public class ThermalManagerService extends SystemService {
             if (!halConnected) {
                 mHalWrapper = new ThermalHal20Wrapper();
                 halConnected = mHalWrapper.connectToHal();
-                if (!halConnected) {
-                    mHalWrapper = new ThermalHal11Wrapper();
-                    halConnected = mHalWrapper.connectToHal();
-                }
+            }
+            if (!halConnected) {
+                mHalWrapper = new ThermalHal11Wrapper();
+                halConnected = mHalWrapper.connectToHal();
+            }
+            if (!halConnected) {
+                mHalWrapper = new ThermalHal10Wrapper();
+                halConnected = mHalWrapper.connectToHal();
             }
             mHalWrapper.setCallback(this::onTemperatureChangedCallback);
             if (!halConnected) {
@@ -616,6 +620,81 @@ public class ThermalManagerService extends SystemService {
         }
     }
 
+
+    static class ThermalHal10Wrapper extends ThermalHalWrapper {
+        /** Proxy object for the Thermal HAL 1.0 service. */
+        @GuardedBy("mHalLock")
+        private android.hardware.thermal.V1_0.IThermal mThermalHal10 = null;
+
+        @Override
+        protected List<Temperature> getCurrentTemperatures(boolean shouldFilter,
+                int type) {
+            synchronized (mHalLock) {
+                List<Temperature> ret = new ArrayList<>();
+                if (mThermalHal10 == null) {
+                    return ret;
+                }
+                try {
+                    mThermalHal10.getTemperatures(
+                            (ThermalStatus status,
+                                    ArrayList<android.hardware.thermal.V1_0.Temperature>
+                                            temperatures) -> {
+                                if (ThermalStatusCode.SUCCESS == status.code) {
+                                    for (android.hardware.thermal.V1_0.Temperature
+                                            temperature : temperatures) {
+                                        if (shouldFilter && type != temperature.type) {
+                                            continue;
+                                        }
+                                        // Thermal HAL 1.0 doesn't report current throttling status
+                                        ret.add(new Temperature(
+                                                temperature.currentValue, temperature.type,
+                                                temperature.name,
+                                                Temperature.THROTTLING_NONE));
+                                    }
+                                } else {
+                                    Slog.e(TAG,
+                                            "Couldn't get temperatures because of HAL error: "
+                                                    + status.debugMessage);
+                                }
+
+                            });
+                } catch (RemoteException e) {
+                    Slog.e(TAG, "Couldn't getCurrentTemperatures, reconnecting...", e);
+                    connectToHal();
+                }
+                return ret;
+            }
+        }
+
+        @Override
+        protected boolean connectToHal() {
+            synchronized (mHalLock) {
+                try {
+                    mThermalHal10 = android.hardware.thermal.V1_0.IThermal.getService();
+                    mThermalHal10.linkToDeath(new DeathRecipient(),
+                            THERMAL_HAL_DEATH_COOKIE);
+                    Slog.i(TAG,
+                            "Thermal HAL 1.0 service connected, no thermal call back will be "
+                                    + "called due to legacy API.");
+                } catch (NoSuchElementException | RemoteException e) {
+                    Slog.e(TAG,
+                            "Thermal HAL 1.0 service not connected.");
+                    mThermalHal10 = null;
+                }
+                return (mThermalHal10 != null);
+            }
+        }
+
+        @Override
+        protected void dump(PrintWriter pw, String prefix) {
+            synchronized (mHalLock) {
+                pw.print(prefix);
+                pw.println("ThermalHAL 1.0 connected: " + (mThermalHal10 != null ? "yes"
+                        : "no"));
+            }
+        }
+    }
+
     static class ThermalHal11Wrapper extends ThermalHalWrapper {
         /** Proxy object for the Thermal HAL 1.1 service. */
         @GuardedBy("mHalLock")