NormalBrightnessModeController configuration

Bug: b/277877297
Test: atest DisplayDeviceCongigTest, atest NormalBrightnessControllerTest
Change-Id: I8681d009336d22206db355e6a18a79bc89c39603

services/core/java/com/android/server/display/BrightnessRangeController.java

@@ -20,6 +20,7 @@ import android.hardware.display.BrightnessInfo;
 import android.os.IBinder;
 
 import java.io.PrintWriter;
+import java.util.function.BooleanSupplier;
 
 class BrightnessRangeController {
 
@@ -43,20 +44,10 @@ class BrightnessRangeController {
     }
 
     void onAmbientLuxChange(float ambientLux) {
-        if (NBM_FEATURE_FLAG) {
+        applyChanges(
-            boolean nbmTransitionChanged = mNormalBrightnessModeController.onAmbientLuxChange(
+                () -> mNormalBrightnessModeController.onAmbientLuxChange(ambientLux),
-                    ambientLux);
+                () -> mHbmController.onAmbientLuxChange(ambientLux)
-            int previousHbm = mHbmController.getHighBrightnessMode();
+        );
-            mHbmController.onAmbientLuxChange(ambientLux);
-            int nextHbm = mHbmController.getHighBrightnessMode();
-            // if hbm changed - callback was triggered in mHbmController.onAmbientLuxChange
-            // if nbm transition not changed - no need to trigger callback
-            if (previousHbm == nextHbm && nbmTransitionChanged) {
-                mModeChangeCallback.run();
-            }
-        } else {
-            mHbmController.onAmbientLuxChange(ambientLux);
-        }
     }
 
     float getNormalBrightnessMax() {
@@ -65,10 +56,16 @@ class BrightnessRangeController {
 
     void loadFromConfig(HighBrightnessModeMetadata hbmMetadata, IBinder token,
             DisplayDeviceInfo info, DisplayDeviceConfig displayDeviceConfig) {
-        mHbmController.setHighBrightnessModeMetadata(hbmMetadata);
+        applyChanges(
-        mHbmController.resetHbmData(info.width, info.height, token, info.uniqueId,
+                () -> mNormalBrightnessModeController.resetNbmData(
-                displayDeviceConfig.getHighBrightnessModeData(),
+                        displayDeviceConfig.getLuxThrottlingData()),
-                displayDeviceConfig::getHdrBrightnessFromSdr);
+                () -> {
+                    mHbmController.setHighBrightnessModeMetadata(hbmMetadata);
+                    mHbmController.resetHbmData(info.width, info.height, token, info.uniqueId,
+                            displayDeviceConfig.getHighBrightnessModeData(),
+                            displayDeviceConfig::getHdrBrightnessFromSdr);
+                }
+        );
     }
 
     void stop() {
@@ -76,7 +73,10 @@ class BrightnessRangeController {
     }
 
     void setAutoBrightnessEnabled(int state) {
-        mHbmController.setAutoBrightnessEnabled(state);
+        applyChanges(
+                () -> mNormalBrightnessModeController.setAutoBrightnessState(state),
+                () ->  mHbmController.setAutoBrightnessEnabled(state)
+        );
     }
 
     void onBrightnessChanged(float brightness, float unthrottledBrightness,
@@ -109,4 +109,18 @@ class BrightnessRangeController {
     float getTransitionPoint() {
         return mHbmController.getTransitionPoint();
     }
+
+    private void applyChanges(BooleanSupplier nbmChangesFunc, Runnable hbmChangesFunc) {
+        if (NBM_FEATURE_FLAG) {
+            boolean nbmTransitionChanged = nbmChangesFunc.getAsBoolean();
+            hbmChangesFunc.run();
+            // if nbm transition changed - trigger callback
+            // HighBrightnessModeController handles sending changes itself
+            if (nbmTransitionChanged) {
+                mModeChangeCallback.run();
+            }
+        } else {
+            hbmChangesFunc.run();
+        }
+    }
 }

services/core/java/com/android/server/display/DisplayDeviceConfig.java

@@ -41,6 +41,7 @@ import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.display.BrightnessSynchronizer;
 import com.android.server.display.config.AutoBrightness;
 import com.android.server.display.config.BlockingZoneConfig;
+import com.android.server.display.config.BrightnessLimitMap;
 import com.android.server.display.config.BrightnessThresholds;
 import com.android.server.display.config.BrightnessThrottlingMap;
 import com.android.server.display.config.BrightnessThrottlingPoint;
@@ -51,8 +52,11 @@ import com.android.server.display.config.DisplayQuirks;
 import com.android.server.display.config.HbmTiming;
 import com.android.server.display.config.HighBrightnessMode;
 import com.android.server.display.config.IntegerArray;
+import com.android.server.display.config.LuxThrottling;
 import com.android.server.display.config.NitsMap;
+import com.android.server.display.config.NonNegativeFloatToFloatPoint;
 import com.android.server.display.config.Point;
+import com.android.server.display.config.PredefinedBrightnessLimitNames;
 import com.android.server.display.config.RefreshRateConfigs;
 import com.android.server.display.config.RefreshRateRange;
 import com.android.server.display.config.RefreshRateThrottlingMap;
@@ -219,6 +223,22 @@ import javax.xml.datatype.DatatypeConfigurationException;
  *        <allowInLowPowerMode>false</allowInLowPowerMode>
  *      </highBrightnessMode>
  *
+ *      <luxThrottling>
+ *        <brightnessLimitMap>
+ *          <type>default</type>
+ *          <map>
+ *            <point>
+ *                <first>5000</first>
+ *                <second>0.3</second>
+ *            </point>
+ *            <point>
+ *               <first>5000</first>
+ *               <second>0.3</second>
+ *            </point>
+ *          </map>
+ *        </brightnessPeakMap>
+ *      </luxThrottling>
+ *
  *      <quirks>
  *       <quirk>canSetBrightnessViaHwc</quirk>
  *      </quirks>
@@ -693,6 +713,9 @@ public class DisplayDeviceConfig {
     private final Map<String, SparseArray<SurfaceControl.RefreshRateRange>>
             mRefreshRateThrottlingMap = new HashMap<>();
 
+    private final Map<BrightnessLimitMapType, Map<Float, Float>>
+            mLuxThrottlingData = new HashMap<>();
+
     @Nullable
     private HostUsiVersion mHostUsiVersion;
 
@@ -1344,6 +1367,11 @@ public class DisplayDeviceConfig {
         return hbmData;
     }
 
+    @NonNull
+    public Map<BrightnessLimitMapType, Map<Float, Float>> getLuxThrottlingData() {
+        return mLuxThrottlingData;
+    }
+
     public List<RefreshRateLimitation> getRefreshRateLimitations() {
         return mRefreshRateLimitations;
     }
@@ -1530,6 +1558,7 @@ public class DisplayDeviceConfig {
                 + ", mBrightnessDefault=" + mBrightnessDefault
                 + ", mQuirks=" + mQuirks
                 + ", isHbmEnabled=" + mIsHighBrightnessModeEnabled
+                + ", mLuxThrottlingData=" + mLuxThrottlingData
                 + ", mHbmData=" + mHbmData
                 + ", mSdrToHdrRatioSpline=" + mSdrToHdrRatioSpline
                 + ", mThermalBrightnessThrottlingDataMapByThrottlingId="
@@ -1676,6 +1705,7 @@ public class DisplayDeviceConfig {
                 loadBrightnessMap(config);
                 loadThermalThrottlingConfig(config);
                 loadHighBrightnessModeData(config);
+                loadLuxThrottling(config);
                 loadQuirks(config);
                 loadBrightnessRamps(config);
                 loadAmbientLightSensorFromDdc(config);
@@ -2428,6 +2458,54 @@ public class DisplayDeviceConfig {
         }
     }
 
+    private void loadLuxThrottling(DisplayConfiguration config) {
+        LuxThrottling cfg = config.getLuxThrottling();
+        if (cfg != null) {
+            HighBrightnessMode hbm = config.getHighBrightnessMode();
+            float hbmTransitionPoint = hbm != null ? hbm.getTransitionPoint_all().floatValue()
+                    : PowerManager.BRIGHTNESS_MAX;
+            List<BrightnessLimitMap> limitMaps = cfg.getBrightnessLimitMap();
+            for (BrightnessLimitMap map : limitMaps) {
+                PredefinedBrightnessLimitNames type = map.getType();
+                BrightnessLimitMapType mappedType = BrightnessLimitMapType.convert(type);
+                if (mappedType == null) {
+                    Slog.wtf(TAG, "Invalid NBM config: unsupported map type=" + type);
+                    continue;
+                }
+                if (mLuxThrottlingData.containsKey(mappedType)) {
+                    Slog.wtf(TAG, "Invalid NBM config: duplicate map type=" + mappedType);
+                    continue;
+                }
+                Map<Float, Float> luxToTransitionPointMap = new HashMap<>();
+
+                List<NonNegativeFloatToFloatPoint> points = map.getMap().getPoint();
+                for (NonNegativeFloatToFloatPoint point : points) {
+                    float lux = point.getFirst().floatValue();
+                    float maxBrightness = point.getSecond().floatValue();
+                    if (maxBrightness > hbmTransitionPoint) {
+                        Slog.wtf(TAG,
+                                "Invalid NBM config: maxBrightness is greater than hbm"
+                                        + ".transitionPoint. type="
+                                        + type + "; lux=" + lux + "; maxBrightness="
+                                        + maxBrightness);
+                        continue;
+                    }
+                    if (luxToTransitionPointMap.containsKey(lux)) {
+                        Slog.wtf(TAG,
+                                "Invalid NBM config: duplicate lux key. type=" + type + "; lux="
+                                        + lux);
+                        continue;
+                    }
+                    luxToTransitionPointMap.put(lux,
+                            mBacklightToBrightnessSpline.interpolate(maxBrightness));
+                }
+                if (!luxToTransitionPointMap.isEmpty()) {
+                    mLuxThrottlingData.put(mappedType, luxToTransitionPointMap);
+                }
+            }
+        }
+    }
+
     private void loadBrightnessRamps(DisplayConfiguration config) {
         // Priority 1: Value in the display device config (float)
         // Priority 2: Value in the config.xml (int)
@@ -3155,4 +3233,19 @@ public class DisplayDeviceConfig {
             }
         }
     }
+
+    public enum BrightnessLimitMapType {
+        DEFAULT, ADAPTIVE;
+
+        @Nullable
+        private static BrightnessLimitMapType convert(PredefinedBrightnessLimitNames type) {
+            switch (type) {
+                case _default:
+                    return DEFAULT;
+                case adaptive:
+                    return ADAPTIVE;
+            }
+            return null;
+        }
+    }
 }

services/core/java/com/android/server/display/DisplayPowerController.java

@@ -2141,7 +2141,9 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
     }
 
     void postBrightnessChangeRunnable() {
-        mHandler.post(mOnBrightnessChangeRunnable);
+        if (!mHandler.hasCallbacks(mOnBrightnessChangeRunnable)) {
+            mHandler.post(mOnBrightnessChangeRunnable);
+        }
     }
 
     private HighBrightnessModeController createHbmControllerLocked(

services/core/java/com/android/server/display/DisplayPowerController2.java

@@ -1788,7 +1788,9 @@ final class DisplayPowerController2 implements AutomaticBrightnessController.Cal
     }
 
     void postBrightnessChangeRunnable() {
-        mHandler.post(mOnBrightnessChangeRunnable);
+        if (!mHandler.hasCallbacks(mOnBrightnessChangeRunnable)) {
+            mHandler.post(mOnBrightnessChangeRunnable);
+        }
     }
 
     private HighBrightnessModeController createHbmControllerLocked(

services/core/java/com/android/server/display/NormalBrightnessModeController.java

@@ -16,36 +16,79 @@
 
 package com.android.server.display;
 
+import android.annotation.NonNull;
 import android.os.PowerManager;
 
+import com.android.server.display.DisplayDeviceConfig.BrightnessLimitMapType;
+
 import java.util.HashMap;
 import java.util.Map;
 
+/**
+ * Limits brightness for normal-brightness mode, based on ambient lux
+ **/
 class NormalBrightnessModeController {
-    private Map<Float, Float> mTransitionPoints = new HashMap<>();
+    @NonNull
+    private Map<BrightnessLimitMapType, Map<Float, Float>> mMaxBrightnessLimits = new HashMap<>();
+    private float mAmbientLux = Float.MAX_VALUE;
+    private boolean mAutoBrightnessEnabled = false;
 
     // brightness limit in normal brightness mode, based on ambient lux.
-    private float mVirtualTransitionPoint = PowerManager.BRIGHTNESS_MAX;
+    private float mMaxBrightness = PowerManager.BRIGHTNESS_MAX;
 
     boolean onAmbientLuxChange(float ambientLux) {
-        float currentAmbientBoundary = Float.MAX_VALUE;
+        mAmbientLux = ambientLux;
-        float currentTransitionPoint = PowerManager.BRIGHTNESS_MAX;
+        return recalculateMaxBrightness();
-        for (Map.Entry<Float, Float> transitionPoint: mTransitionPoints.entrySet()) {
+    }
-            float ambientBoundary = transitionPoint.getKey();
+
-            // find ambient lux upper boundary closest to current ambient lux
+    boolean setAutoBrightnessState(int state) {
-            if (ambientBoundary > ambientLux && ambientBoundary < currentAmbientBoundary) {
+        boolean isEnabled = state == AutomaticBrightnessController.AUTO_BRIGHTNESS_ENABLED;
-                currentTransitionPoint = transitionPoint.getValue();
+        if (isEnabled != mAutoBrightnessEnabled) {
-                currentAmbientBoundary = ambientBoundary;
+            mAutoBrightnessEnabled = isEnabled;
-            }
+            return recalculateMaxBrightness();
-        }
-        if (mVirtualTransitionPoint != currentTransitionPoint) {
-            mVirtualTransitionPoint = currentTransitionPoint;
-            return true;
         }
         return false;
     }
 
     float getCurrentBrightnessMax() {
-        return mVirtualTransitionPoint;
+        return mMaxBrightness;
+    }
+
+    boolean resetNbmData(
+            @NonNull Map<BrightnessLimitMapType, Map<Float, Float>> maxBrightnessLimits) {
+        mMaxBrightnessLimits = maxBrightnessLimits;
+        return recalculateMaxBrightness();
+    }
+
+    private boolean recalculateMaxBrightness() {
+        float foundAmbientBoundary = Float.MAX_VALUE;
+        float foundMaxBrightness = PowerManager.BRIGHTNESS_MAX;
+
+        Map<Float, Float> maxBrightnessPoints = null;
+
+        if (mAutoBrightnessEnabled) {
+            maxBrightnessPoints = mMaxBrightnessLimits.get(BrightnessLimitMapType.ADAPTIVE);
+        }
+
+        if (maxBrightnessPoints == null) {
+            maxBrightnessPoints = mMaxBrightnessLimits.get(BrightnessLimitMapType.DEFAULT);
+        }
+
+        if (maxBrightnessPoints != null) {
+            for (Map.Entry<Float, Float> brightnessPoint : maxBrightnessPoints.entrySet()) {
+                float ambientBoundary = brightnessPoint.getKey();
+                // find ambient lux upper boundary closest to current ambient lux
+                if (ambientBoundary > mAmbientLux && ambientBoundary < foundAmbientBoundary) {
+                    foundMaxBrightness = brightnessPoint.getValue();
+                    foundAmbientBoundary = ambientBoundary;
+                }
+            }
+        }
+
+        if (mMaxBrightness != foundMaxBrightness) {
+            mMaxBrightness = foundMaxBrightness;
+            return true;
+        }
+        return false;
     }
 }

services/core/xsd/display-device-config/display-device-config.xsd

@@ -46,6 +46,8 @@
                     <xs:annotation name="nonnull"/>
                     <xs:annotation name="final"/>
                 </xs:element>
+                <xs:element type="luxThrottling" name="luxThrottling" minOccurs="0"
+                            maxOccurs="1"/>
                 <xs:element type="highBrightnessMode" name="highBrightnessMode" minOccurs="0"
                             maxOccurs="1"/>
                 <xs:element type="displayQuirks" name="quirks" minOccurs="0" maxOccurs="1"/>
@@ -137,6 +139,39 @@
         </xs:sequence>
     </xs:complexType>
 
+    <xs:complexType name="luxThrottling">
+        <xs:sequence>
+            <xs:element name="brightnessLimitMap" type="brightnessLimitMap"
+                        maxOccurs="unbounded">
+                <xs:annotation name="nonnull"/>
+                <xs:annotation name="final"/>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+
+    <xs:complexType name="brightnessLimitMap">
+        <xs:sequence>
+            <xs:element name="type" type="PredefinedBrightnessLimitNames">
+                <xs:annotation name="nonnull"/>
+                <xs:annotation name="final"/>
+            </xs:element>
+            <!-- lux level from light sensor to screen brightness recommended max value map.
+            Screen brightness recommended max value is to highBrightnessMode.transitionPoint and must be below that -->
+            <xs:element name="map" type="nonNegativeFloatToFloatMap">
+                <xs:annotation name="nonnull"/>
+                <xs:annotation name="final"/>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+
+    <!-- Predefined type names as defined by DisplayDeviceConfig.BrightnessLimitMapType -->
+    <xs:simpleType  name="PredefinedBrightnessLimitNames">
+        <xs:restriction base="xs:string">
+            <xs:enumeration value="default"/>
+            <xs:enumeration value="adaptive"/>
+        </xs:restriction>
+    </xs:simpleType>
+
     <xs:complexType name="highBrightnessMode">
         <xs:all>
             <xs:element name="transitionPoint" type="nonNegativeDecimal" minOccurs="1"
@@ -575,4 +610,27 @@
             <xs:annotation name="final"/>
         </xs:element>
     </xs:complexType>
+
+    <!-- generic types -->
+    <xs:complexType name="nonNegativeFloatToFloatPoint">
+        <xs:sequence>
+            <xs:element name="first" type="nonNegativeDecimal">
+                <xs:annotation name="nonnull"/>
+                <xs:annotation name="final"/>
+            </xs:element>
+            <xs:element name="second" type="nonNegativeDecimal">
+                <xs:annotation name="nonnull"/>
+                <xs:annotation name="final"/>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+
+    <xs:complexType name="nonNegativeFloatToFloatMap">
+        <xs:sequence>
+            <xs:element name="point" type="nonNegativeFloatToFloatPoint" maxOccurs="unbounded">
+                <xs:annotation name="nonnull"/>
+                <xs:annotation name="final"/>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
 </xs:schema>

services/core/xsd/display-device-config/schema/current.txt

@@ -26,6 +26,14 @@ package com.android.server.display.config {
     method public final java.util.List<com.android.server.display.config.DisplayBrightnessPoint> getDisplayBrightnessPoint();
   }
 
+  public class BrightnessLimitMap {
+    ctor public BrightnessLimitMap();
+    method @NonNull public final com.android.server.display.config.NonNegativeFloatToFloatMap getMap();
+    method @NonNull public final com.android.server.display.config.PredefinedBrightnessLimitNames getType();
+    method public final void setMap(@NonNull com.android.server.display.config.NonNegativeFloatToFloatMap);
+    method public final void setType(@NonNull com.android.server.display.config.PredefinedBrightnessLimitNames);
+  }
+
   public class BrightnessThresholds {
     ctor public BrightnessThresholds();
     method public final com.android.server.display.config.ThresholdPoints getBrightnessThresholdPoints();
@@ -89,6 +97,7 @@ package com.android.server.display.config {
     method public final com.android.server.display.config.Thresholds getDisplayBrightnessChangeThresholdsIdle();
     method public com.android.server.display.config.HighBrightnessMode getHighBrightnessMode();
     method public final com.android.server.display.config.SensorDetails getLightSensor();
+    method public com.android.server.display.config.LuxThrottling getLuxThrottling();
     method @Nullable public final String getName();
     method public final com.android.server.display.config.SensorDetails getProxSensor();
     method public com.android.server.display.config.DisplayQuirks getQuirks();
@@ -115,6 +124,7 @@ package com.android.server.display.config {
     method public final void setDisplayBrightnessChangeThresholdsIdle(com.android.server.display.config.Thresholds);
     method public void setHighBrightnessMode(com.android.server.display.config.HighBrightnessMode);
     method public final void setLightSensor(com.android.server.display.config.SensorDetails);
+    method public void setLuxThrottling(com.android.server.display.config.LuxThrottling);
     method public final void setName(@Nullable String);
     method public final void setProxSensor(com.android.server.display.config.SensorDetails);
     method public void setQuirks(com.android.server.display.config.DisplayQuirks);
@@ -173,6 +183,11 @@ package com.android.server.display.config {
     method public java.util.List<java.math.BigInteger> getItem();
   }
 
+  public class LuxThrottling {
+    ctor public LuxThrottling();
+    method @NonNull public final java.util.List<com.android.server.display.config.BrightnessLimitMap> getBrightnessLimitMap();
+  }
+
   public class NitsMap {
     ctor public NitsMap();
     method public String getInterpolation();
@@ -180,6 +195,19 @@ package com.android.server.display.config {
     method public void setInterpolation(String);
   }
 
+  public class NonNegativeFloatToFloatMap {
+    ctor public NonNegativeFloatToFloatMap();
+    method @NonNull public final java.util.List<com.android.server.display.config.NonNegativeFloatToFloatPoint> getPoint();
+  }
+
+  public class NonNegativeFloatToFloatPoint {
+    ctor public NonNegativeFloatToFloatPoint();
+    method @NonNull public final java.math.BigDecimal getFirst();
+    method @NonNull public final java.math.BigDecimal getSecond();
+    method public final void setFirst(@NonNull java.math.BigDecimal);
+    method public final void setSecond(@NonNull java.math.BigDecimal);
+  }
+
   public class Point {
     ctor public Point();
     method @NonNull public final java.math.BigDecimal getNits();
@@ -188,6 +216,12 @@ package com.android.server.display.config {
     method public final void setValue(@NonNull java.math.BigDecimal);
   }
 
+  public enum PredefinedBrightnessLimitNames {
+    method public String getRawName();
+    enum_constant public static final com.android.server.display.config.PredefinedBrightnessLimitNames _default;
+    enum_constant public static final com.android.server.display.config.PredefinedBrightnessLimitNames adaptive;
+  }
+
   public class RefreshRateConfigs {
     ctor public RefreshRateConfigs();
     method public final java.math.BigInteger getDefaultPeakRefreshRate();

services/tests/servicestests/src/com/android/server/display/DisplayDeviceConfigTest.java

@@ -52,6 +52,7 @@ import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 @SmallTest
 @RunWith(AndroidJUnit4.class)
@@ -376,6 +377,116 @@ public final class DisplayDeviceConfigTest {
         assertEquals(90, testMap.get(Temperature.THROTTLING_EMERGENCY).max, SMALL_DELTA);
     }
 
+    @Test
+    public void testValidLuxThrottling() throws Exception {
+        setupDisplayDeviceConfigFromDisplayConfigFile();
+
+        Map<DisplayDeviceConfig.BrightnessLimitMapType, Map<Float, Float>> luxThrottlingData =
+                mDisplayDeviceConfig.getLuxThrottlingData();
+        assertEquals(2, luxThrottlingData.size());
+
+        Map<Float, Float> adaptiveOnBrightnessPoints = luxThrottlingData.get(
+                DisplayDeviceConfig.BrightnessLimitMapType.ADAPTIVE);
+        assertEquals(2, adaptiveOnBrightnessPoints.size());
+        assertEquals(0.3f, adaptiveOnBrightnessPoints.get(1000f), SMALL_DELTA);
+        assertEquals(0.5f, adaptiveOnBrightnessPoints.get(5000f), SMALL_DELTA);
+
+        Map<Float, Float> adaptiveOffBrightnessPoints = luxThrottlingData.get(
+                DisplayDeviceConfig.BrightnessLimitMapType.DEFAULT);
+        assertEquals(2, adaptiveOffBrightnessPoints.size());
+        assertEquals(0.35f, adaptiveOffBrightnessPoints.get(1500f), SMALL_DELTA);
+        assertEquals(0.55f, adaptiveOffBrightnessPoints.get(5500f), SMALL_DELTA);
+    }
+
+    @Test
+    public void testInvalidLuxThrottling() throws Exception {
+        setupDisplayDeviceConfigFromDisplayConfigFile(getContent(getInvalidLuxThrottling()));
+
+        Map<DisplayDeviceConfig.BrightnessLimitMapType, Map<Float, Float>> luxThrottlingData =
+                mDisplayDeviceConfig.getLuxThrottlingData();
+        assertEquals(1, luxThrottlingData.size());
+
+        Map<Float, Float> adaptiveOnBrightnessPoints = luxThrottlingData.get(
+                DisplayDeviceConfig.BrightnessLimitMapType.ADAPTIVE);
+        assertEquals(1, adaptiveOnBrightnessPoints.size());
+        assertEquals(0.3f, adaptiveOnBrightnessPoints.get(1000f), SMALL_DELTA);
+    }
+
+    private String getValidLuxThrottling() {
+        return "<luxThrottling>\n"
+                + "    <brightnessLimitMap>\n"
+                + "        <type>adaptive</type>\n"
+                + "        <map>\n"
+                + "            <point>"
+                + "                <first>1000</first>\n"
+                + "                <second>0.3</second>\n"
+                + "            </point>"
+                + "            <point>"
+                + "                <first>5000</first>\n"
+                + "                <second>0.5</second>\n"
+                + "            </point>"
+                + "        </map>\n"
+                + "    </brightnessLimitMap>\n"
+                + "    <brightnessLimitMap>\n"
+                + "        <type>default</type>\n"
+                + "        <map>\n"
+                + "            <point>"
+                + "                <first>1500</first>\n"
+                + "                <second>0.35</second>\n"
+                + "            </point>"
+                + "            <point>"
+                + "                <first>5500</first>\n"
+                + "                <second>0.55</second>\n"
+                + "            </point>"
+                + "        </map>\n"
+                + "    </brightnessLimitMap>\n"
+                + "</luxThrottling>";
+    }
+
+    private String getInvalidLuxThrottling() {
+        return "<luxThrottling>\n"
+                + "    <brightnessLimitMap>\n"
+                + "        <type>adaptive</type>\n"
+                + "        <map>\n"
+                + "            <point>"
+                + "                <first>1000</first>\n"
+                + "                <second>0.3</second>\n"
+                + "            </point>"
+                + "            <point>" // second > hbm.transitionPoint, skipped
+                + "                <first>1500</first>\n"
+                + "                <second>0.9</second>\n"
+                + "            </point>"
+                + "            <point>" // same lux value, skipped
+                + "                <first>1000</first>\n"
+                + "                <second>0.5</second>\n"
+                + "            </point>"
+                + "        </map>\n"
+                + "    </brightnessLimitMap>\n"
+                + "    <brightnessLimitMap>\n" // Same type, skipped
+                + "        <type>adaptive</type>\n"
+                + "        <map>\n"
+                + "            <point>"
+                + "                <first>2000</first>\n"
+                + "                <second>0.35</second>\n"
+                + "            </point>"
+                + "            <point>"
+                + "                <first>6000</first>\n"
+                + "                <second>0.55</second>\n"
+                + "            </point>"
+                + "        </map>\n"
+                + "    </brightnessLimitMap>\n"
+                + "    <brightnessLimitMap>\n" // Invalid points only, skipped
+                + "        <type>default</type>\n"
+                + "        <map>\n"
+                + "            <point>"
+                + "                <first>2500</first>\n"
+                + "                <second>0.99</second>\n"
+                + "            </point>"
+                + "        </map>\n"
+                + "    </brightnessLimitMap>\n"
+                + "</luxThrottling>";
+    }
+
     private String getRefreshThermalThrottlingMaps() {
         return "<refreshRateThrottlingMap>\n"
                + "    <refreshRateThrottlingPoint>\n"
@@ -405,6 +516,10 @@ public final class DisplayDeviceConfigTest {
     }
 
     private String getContent() {
+        return getContent(getValidLuxThrottling());
+    }
+
+    private String getContent(String brightnessCapConfig) {
         return "<?xml version='1.0' encoding='utf-8' standalone='yes' ?>\n"
                 + "<displayConfiguration>\n"
                 +   "<name>Example Display</name>"
@@ -462,6 +577,7 @@ public final class DisplayDeviceConfigTest {
                 +            "</point>\n"
                 +       "</sdrHdrRatioMap>\n"
                 +   "</highBrightnessMode>\n"
+                + brightnessCapConfig
                 +   "<screenOffBrightnessSensor>\n"
                 +       "<type>sensor_12345</type>\n"
                 +       "<name>Sensor 12345</name>\n"
@@ -731,8 +847,12 @@ public final class DisplayDeviceConfigTest {
     }
 
     private void setupDisplayDeviceConfigFromDisplayConfigFile() throws IOException {
+        setupDisplayDeviceConfigFromDisplayConfigFile(getContent());
+    }
+
+    private void setupDisplayDeviceConfigFromDisplayConfigFile(String content) throws IOException {
         Path tempFile = Files.createTempFile("display_config", ".tmp");
-        Files.write(tempFile, getContent().getBytes(StandardCharsets.UTF_8));
+        Files.write(tempFile, content.getBytes(StandardCharsets.UTF_8));
         mDisplayDeviceConfig = new DisplayDeviceConfig(mContext);
         mDisplayDeviceConfig.initFromFile(tempFile.toFile());
     }

services/tests/servicestests/src/com/android/server/display/NormalBrightnessModeControllerTest.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.display;
+
+import static org.junit.Assert.assertEquals;
+
+import android.os.PowerManager;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.internal.annotations.Keep;
+import com.android.server.display.DisplayDeviceConfig.BrightnessLimitMapType;
+
+import com.google.common.collect.ImmutableMap;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import junitparams.JUnitParamsRunner;
+import junitparams.Parameters;
+
+@SmallTest
+@RunWith(JUnitParamsRunner.class)
+public class NormalBrightnessModeControllerTest {
+    private static final float FLOAT_TOLERANCE = 0.001f;
+
+    private final NormalBrightnessModeController mController = new NormalBrightnessModeController();
+
+    @Keep
+    private static Object[][] brightnessData() {
+        return new Object[][]{
+                // no brightness config
+                {0, AutomaticBrightnessController.AUTO_BRIGHTNESS_DISABLED, new HashMap<>(),
+                        PowerManager.BRIGHTNESS_MAX},
+                {0, AutomaticBrightnessController.AUTO_BRIGHTNESS_ENABLED, new HashMap<>(),
+                        PowerManager.BRIGHTNESS_MAX},
+                {100, AutomaticBrightnessController.AUTO_BRIGHTNESS_ENABLED, new HashMap<>(),
+                        PowerManager.BRIGHTNESS_MAX},
+                // Auto brightness - on, config only for default
+                {100, AutomaticBrightnessController.AUTO_BRIGHTNESS_ENABLED, ImmutableMap.of(
+                        BrightnessLimitMapType.DEFAULT,
+                        ImmutableMap.of(99f, 0.1f, 101f, 0.2f)
+                ), 0.2f},
+                // Auto brightness - off, config only for default
+                {100, AutomaticBrightnessController.AUTO_BRIGHTNESS_DISABLED, ImmutableMap.of(
+                        BrightnessLimitMapType.DEFAULT,
+                        ImmutableMap.of(99f, 0.1f, 101f, 0.2f)
+                ), 0.2f},
+                // Auto brightness - off, config only for adaptive
+                {100, AutomaticBrightnessController.AUTO_BRIGHTNESS_DISABLED, ImmutableMap.of(
+                        BrightnessLimitMapType.ADAPTIVE,
+                        ImmutableMap.of(99f, 0.1f, 101f, 0.2f)
+                ), PowerManager.BRIGHTNESS_MAX},
+                // Auto brightness - on, config only for adaptive
+                {100, AutomaticBrightnessController.AUTO_BRIGHTNESS_ENABLED, ImmutableMap.of(
+                        BrightnessLimitMapType.ADAPTIVE,
+                        ImmutableMap.of(99f, 0.1f, 101f, 0.2f)
+                ), 0.2f},
+                // Auto brightness - on, config for both
+                {100, AutomaticBrightnessController.AUTO_BRIGHTNESS_ENABLED, ImmutableMap.of(
+                        BrightnessLimitMapType.DEFAULT,
+                        ImmutableMap.of(99f, 0.1f, 101f, 0.2f),
+                        BrightnessLimitMapType.ADAPTIVE,
+                        ImmutableMap.of(99f, 0.3f, 101f, 0.4f)
+                ), 0.4f},
+                // Auto brightness - off, config for both
+                {100, AutomaticBrightnessController.AUTO_BRIGHTNESS_DISABLED, ImmutableMap.of(
+                        BrightnessLimitMapType.DEFAULT,
+                        ImmutableMap.of(99f, 0.1f, 101f, 0.2f),
+                        BrightnessLimitMapType.ADAPTIVE,
+                        ImmutableMap.of(99f, 0.3f, 101f, 0.4f)
+                ), 0.2f},
+                // Auto brightness - on, config for both, ambient high
+                {1000, AutomaticBrightnessController.AUTO_BRIGHTNESS_ENABLED, ImmutableMap.of(
+                        BrightnessLimitMapType.DEFAULT,
+                        ImmutableMap.of(1000f, 0.1f, 2000f, 0.2f),
+                        BrightnessLimitMapType.ADAPTIVE,
+                        ImmutableMap.of(99f, 0.3f, 101f, 0.4f)
+                ), PowerManager.BRIGHTNESS_MAX},
+        };
+    }
+
+    @Test
+    @Parameters(method = "brightnessData")
+    public void testReturnsCorrectMaxBrightness(float ambientLux, int autoBrightnessState,
+            Map<BrightnessLimitMapType, Map<Float, Float>> maxBrightnessConfig,
+            float expectedBrightness) {
+        setupController(ambientLux, autoBrightnessState, maxBrightnessConfig);
+
+        assertEquals(expectedBrightness, mController.getCurrentBrightnessMax(), FLOAT_TOLERANCE);
+    }
+
+    private void setupController(float ambientLux, int autoBrightnessState,
+            Map<BrightnessLimitMapType, Map<Float, Float>> maxBrightnessConfig) {
+        mController.onAmbientLuxChange(ambientLux);
+        mController.setAutoBrightnessState(autoBrightnessState);
+        mController.resetNbmData(maxBrightnessConfig);
+    }
+}