diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
index a64fdbf..3dbd25e 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
@@ -63,6 +63,9 @@
     // The alpha value for this layer
     float alpha{1.f};
 
+    // Background blur in pixels
+    int backgroundBlurRadius{0};
+
     // The transform from layer local coordinates to composition coordinates
     ui::Transform geomLayerTransform;
 
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
index 159e928..3a9776d 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
@@ -116,6 +116,7 @@
 
 private:
     void dirtyEntireOutput();
+    compositionengine::OutputLayer* findLayerRequestingBackgroundComposition() const;
     ui::Dataspace getBestDataspace(ui::Dataspace*, bool*) const;
     compositionengine::Output::ColorProfile pickColorProfile(
             const compositionengine::CompositionRefreshArgs&) const;
@@ -126,6 +127,7 @@
     std::unique_ptr<compositionengine::RenderSurface> mRenderSurface;
 
     ReleasedLayers mReleasedLayers;
+    OutputLayer* mLayerRequestingBackgroundBlur = nullptr;
 };
 
 // This template factory function standardizes the implementation details of the
diff --git a/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp b/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp
index 085e838..8065e65 100644
--- a/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp
@@ -61,6 +61,7 @@
     out.append("\n      ");
     dumpVal(out, "blend", toString(blendMode), blendMode);
     dumpVal(out, "alpha", alpha);
+    dumpVal(out, "backgroundBlurRadius", backgroundBlurRadius);
 
     out.append("\n      ");
     dumpVal(out, "type", type);
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 01413b9..650b5c1 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -578,15 +578,33 @@
         return;
     }
 
+    mLayerRequestingBackgroundBlur = findLayerRequestingBackgroundComposition();
+    bool forceClientComposition = mLayerRequestingBackgroundBlur != nullptr;
+
     for (auto* layer : getOutputLayersOrderedByZ()) {
         layer->updateCompositionState(refreshArgs.updatingGeometryThisFrame,
-                                      refreshArgs.devOptForceClientComposition);
+                                      refreshArgs.devOptForceClientComposition ||
+                                              forceClientComposition);
+
+        if (mLayerRequestingBackgroundBlur == layer) {
+            forceClientComposition = false;
+        }
 
         // Send the updated state to the HWC, if appropriate.
         layer->writeStateToHWC(refreshArgs.updatingGeometryThisFrame);
     }
 }
 
+compositionengine::OutputLayer* Output::findLayerRequestingBackgroundComposition() const {
+    compositionengine::OutputLayer* layerRequestingBgComposition = nullptr;
+    for (auto* layer : getOutputLayersOrderedByZ()) {
+        if (layer->getLayer().getFEState().backgroundBlurRadius > 0) {
+            layerRequestingBgComposition = layer;
+        }
+    }
+    return layerRequestingBgComposition;
+}
+
 void Output::updateColorProfile(const compositionengine::CompositionRefreshArgs& refreshArgs) {
     setColorProfile(pickColorProfile(refreshArgs));
 }
@@ -854,11 +872,12 @@
     }
 
     // We boost GPU frequency here because there will be color spaces conversion
-    // and it's expensive. We boost the GPU frequency so that GPU composition can
-    // finish in time. We must reset GPU frequency afterwards, because high frequency
-    // consumes extra battery.
+    // or complex GPU shaders and it's expensive. We boost the GPU frequency so that
+    // GPU composition can finish in time. We must reset GPU frequency afterwards,
+    // because high frequency consumes extra battery.
     const bool expensiveRenderingExpected =
-            clientCompositionDisplay.outputDataspace == ui::Dataspace::DISPLAY_P3;
+            clientCompositionDisplay.outputDataspace == ui::Dataspace::DISPLAY_P3 ||
+            mLayerRequestingBackgroundBlur != nullptr;
     if (expensiveRenderingExpected) {
         setExpensiveRenderingExpected(true);
     }
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
index 24311c7..6761b86 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
@@ -138,6 +138,10 @@
         EXPECT_CALL(mLayer1, editFEState()).WillRepeatedly(ReturnRef(mLayer1FEState));
         EXPECT_CALL(mLayer2, editFEState()).WillRepeatedly(ReturnRef(mLayer2FEState));
         EXPECT_CALL(mLayer3, editFEState()).WillRepeatedly(ReturnRef(mLayer3FEState));
+
+        EXPECT_CALL(mLayer1, getFEState()).WillRepeatedly(ReturnRef(mLayer1FEState));
+        EXPECT_CALL(mLayer2, getFEState()).WillRepeatedly(ReturnRef(mLayer2FEState));
+        EXPECT_CALL(mLayer3, getFEState()).WillRepeatedly(ReturnRef(mLayer3FEState));
     }
 
     void injectLayer(std::unique_ptr<mock::OutputLayer> layer) {
@@ -3637,6 +3641,29 @@
                                                                 kDisplayDataspace));
 }
 
+TEST_F(OutputUpdateAndWriteCompositionStateTest, handlesBackgroundBlurRequests) {
+    // Layer requesting blur, or below, should request client composition.
+    EXPECT_CALL(*mOutputLayer1, updateCompositionState(false, true));
+    EXPECT_CALL(*mOutputLayer1, writeStateToHWC(false));
+    EXPECT_CALL(*mOutputLayer2, updateCompositionState(false, true));
+    EXPECT_CALL(*mOutputLayer2, writeStateToHWC(false));
+    EXPECT_CALL(*mOutputLayer3, updateCompositionState(false, false));
+    EXPECT_CALL(*mOutputLayer3, writeStateToHWC(false));
+
+    mLayer2FEState.backgroundBlurRadius = 10;
+
+    injectLayer(std::move(mOutputLayer1));
+    injectLayer(std::move(mOutputLayer2));
+    injectLayer(std::move(mOutputLayer3));
+
+    mOutput->editState().isEnabled = true;
+
+    CompositionRefreshArgs args;
+    args.updatingGeometryThisFrame = false;
+    args.devOptForceClientComposition = false;
+    mOutput->updateAndWriteCompositionState(args);
+}
+
 TEST_F(GenerateClientCompositionRequestsTest, handlesLandscapeModeSplitScreenRequests) {
     // In split-screen landscape mode, the screen is rotated 90 degrees, with
     // one layer on the left covering the left side of the output, and one layer
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 9c4a784..f4d4329 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -109,6 +109,7 @@
     mCurrentState.hdrMetadata.validTypes = 0;
     mCurrentState.surfaceDamageRegion = Region::INVALID_REGION;
     mCurrentState.cornerRadius = 0.0f;
+    mCurrentState.backgroundBlurRadius = 0;
     mCurrentState.api = -1;
     mCurrentState.hasColorTransform = false;
     mCurrentState.colorSpaceAgnostic = false;
@@ -448,6 +449,7 @@
 
     compositionState.blendMode = static_cast<Hwc2::IComposerClient::BlendMode>(blendMode);
     compositionState.alpha = alpha;
+    compositionState.backgroundBlurRadius = drawingState.backgroundBlurRadius;
 }
 
 void Layer::latchGeometry(compositionengine::LayerFECompositionState& compositionState) const {
@@ -575,6 +577,7 @@
 
     layerSettings.alpha = alpha;
     layerSettings.sourceDataspace = getDataSpace();
+    layerSettings.backgroundBlurRadius = getBackgroundBlurRadius();
     return layerSettings;
 }
 
@@ -1103,6 +1106,16 @@
     return true;
 }
 
+bool Layer::setBackgroundBlurRadius(int backgroundBlurRadius) {
+    if (mCurrentState.backgroundBlurRadius == backgroundBlurRadius) return false;
+
+    mCurrentState.sequence++;
+    mCurrentState.backgroundBlurRadius = backgroundBlurRadius;
+    mCurrentState.modified = true;
+    setTransactionFlags(eTransactionNeeded);
+    return true;
+}
+
 bool Layer::setMatrix(const layer_state_t::matrix22_t& matrix,
         bool allowNonRectPreservingTransforms) {
     ui::Transform t;
@@ -1873,6 +1886,10 @@
     return half4(color.r, color.g, color.b, getAlpha());
 }
 
+int32_t Layer::getBackgroundBlurRadius() const {
+    return getDrawingState().backgroundBlurRadius;
+}
+
 Layer::RoundedCornerState Layer::getRoundedCornerState() const {
     const auto& p = mDrawingParent.promote();
     if (p != nullptr) {
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 0253098..ffe004f 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -179,6 +179,7 @@
 
         half4 color;
         float cornerRadius;
+        int backgroundBlurRadius;
 
         bool inputInfoChanged;
         InputWindowInfo inputInfo;
@@ -299,6 +300,9 @@
     // The shape of the rounded corner rectangle is specified by the crop rectangle of the layer
     // from which we inferred the rounded corner radius.
     virtual bool setCornerRadius(float cornerRadius);
+    // When non-zero, everything below this layer will be blurred by backgroundBlurRadius, which
+    // is specified in pixels.
+    virtual bool setBackgroundBlurRadius(int backgroundBlurRadius);
     virtual bool setTransparentRegionHint(const Region& transparent);
     virtual bool setFlags(uint8_t flags, uint8_t mask);
     virtual bool setLayerStack(uint32_t layerStack);
@@ -663,6 +667,7 @@
     // down the hierarchy).
     half getAlpha() const;
     half4 getColor() const;
+    int32_t getBackgroundBlurRadius() const;
 
     // Returns how rounded corners should be drawn for this layer.
     // This will traverse the hierarchy until it reaches its root, finding topmost rounded
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 0a33830..ba57d37 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -338,6 +338,14 @@
     mLayerTripleBufferingDisabled = atoi(value);
     ALOGI_IF(mLayerTripleBufferingDisabled, "Disabling Triple Buffering");
 
+    property_get("ro.surface_flinger.supports_background_blur", value, "0");
+    bool supportsBlurs = atoi(value);
+    property_get("debug.sf.disableBlurs", value, "0");
+    bool disableBlurs = atoi(value);
+    mEnableBlurs = supportsBlurs && !disableBlurs;
+    ALOGI_IF(!mEnableBlurs, "Disabling blur effects. supported: %d, disabled: %d", supportsBlurs,
+             disableBlurs);
+
     const size_t defaultListSize = MAX_LAYERS;
     auto listSize = property_get_int32("debug.sf.max_igbp_list_size", int32_t(defaultListSize));
     mMaxGraphicBufferProducerListSize = (listSize > 0) ? size_t(listSize) : defaultListSize;
@@ -580,6 +588,7 @@
                 .setUseColorManagerment(useColorManagement)
                 .setEnableProtectedContext(enable_protected_contents(false))
                 .setPrecacheToneMapperShaderOnly(false)
+                .setSupportsBackgroundBlur(mEnableBlurs)
                 .setContextPriority(useContextPriority
                         ? renderengine::RenderEngine::ContextPriority::HIGH
                         : renderengine::RenderEngine::ContextPriority::MEDIUM)
@@ -3379,6 +3388,9 @@
         if (layer->setCornerRadius(s.cornerRadius))
             flags |= eTraversalNeeded;
     }
+    if (what & layer_state_t::eBackgroundBlurRadiusChanged) {
+        if (layer->setBackgroundBlurRadius(s.backgroundBlurRadius)) flags |= eTraversalNeeded;
+    }
     if (what & layer_state_t::eLayerStackChanged) {
         ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
         // We only allow setting layer stacks for top level layers,
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 723e332..b9f230d 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -1025,6 +1025,7 @@
     const std::shared_ptr<TimeStats> mTimeStats;
     const std::unique_ptr<FrameTracer> mFrameTracer;
     bool mUseHwcVirtualDisplays = false;
+    bool mEnableBlurs = false;
     std::atomic<uint32_t> mFrameMissedCount = 0;
     std::atomic<uint32_t> mHwcFrameMissedCount = 0;
     std::atomic<uint32_t> mGpuFrameMissedCount = 0;
diff --git a/services/surfaceflinger/SurfaceInterceptor.cpp b/services/surfaceflinger/SurfaceInterceptor.cpp
index 79123f9..6884b4c 100644
--- a/services/surfaceflinger/SurfaceInterceptor.cpp
+++ b/services/surfaceflinger/SurfaceInterceptor.cpp
@@ -114,6 +114,7 @@
     addLayerStackLocked(transaction, layerId, layer->mCurrentState.layerStack);
     addCropLocked(transaction, layerId, layer->mCurrentState.crop_legacy);
     addCornerRadiusLocked(transaction, layerId, layer->mCurrentState.cornerRadius);
+    addBackgroundBlurRadiusLocked(transaction, layerId, layer->mCurrentState.backgroundBlurRadius);
     if (layer->mCurrentState.barrierLayer_legacy != nullptr) {
         addDeferTransactionLocked(transaction, layerId,
                                   layer->mCurrentState.barrierLayer_legacy.promote(),
@@ -322,6 +323,13 @@
     cornerRadiusChange->set_corner_radius(cornerRadius);
 }
 
+void SurfaceInterceptor::addBackgroundBlurRadiusLocked(Transaction* transaction, int32_t layerId,
+                                                       int32_t backgroundBlurRadius) {
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    BackgroundBlurRadiusChange* blurRadiusChange(change->mutable_background_blur_radius());
+    blurRadiusChange->set_background_blur_radius(backgroundBlurRadius);
+}
+
 void SurfaceInterceptor::addDeferTransactionLocked(Transaction* transaction, int32_t layerId,
         const sp<const Layer>& layer, uint64_t frameNumber)
 {
@@ -422,6 +430,9 @@
     if (state.what & layer_state_t::eCornerRadiusChanged) {
         addCornerRadiusLocked(transaction, layerId, state.cornerRadius);
     }
+    if (state.what & layer_state_t::eBackgroundBlurRadiusChanged) {
+        addBackgroundBlurRadiusLocked(transaction, layerId, state.backgroundBlurRadius);
+    }
     if (state.what & layer_state_t::eDeferTransaction_legacy) {
         sp<Layer> otherLayer = nullptr;
         if (state.barrierHandle_legacy != nullptr) {
diff --git a/services/surfaceflinger/SurfaceInterceptor.h b/services/surfaceflinger/SurfaceInterceptor.h
index c6f9e8a..a665f62 100644
--- a/services/surfaceflinger/SurfaceInterceptor.h
+++ b/services/surfaceflinger/SurfaceInterceptor.h
@@ -152,6 +152,8 @@
     void addLayerStackLocked(Transaction* transaction, int32_t layerId, uint32_t layerStack);
     void addCropLocked(Transaction* transaction, int32_t layerId, const Rect& rect);
     void addCornerRadiusLocked(Transaction* transaction, int32_t layerId, float cornerRadius);
+    void addBackgroundBlurRadiusLocked(Transaction* transaction, int32_t layerId,
+                                       int32_t backgroundBlurRadius);
     void addDeferTransactionLocked(Transaction* transaction, int32_t layerId,
             const sp<const Layer>& layer, uint64_t frameNumber);
     void addOverrideScalingModeLocked(Transaction* transaction, int32_t layerId,
diff --git a/services/surfaceflinger/layerproto/LayerProtoParser.cpp b/services/surfaceflinger/layerproto/LayerProtoParser.cpp
index ef27847..8fce0c9 100644
--- a/services/surfaceflinger/layerproto/LayerProtoParser.cpp
+++ b/services/surfaceflinger/layerproto/LayerProtoParser.cpp
@@ -106,6 +106,7 @@
     layer.refreshPending = layerProto.refresh_pending();
     layer.isProtected = layerProto.is_protected();
     layer.cornerRadius = layerProto.corner_radius();
+    layer.backgroundBlurRadius = layerProto.background_blur_radius();
     for (const auto& entry : layerProto.metadata()) {
         const std::string& dataStr = entry.second;
         std::vector<uint8_t>& outData = layer.metadata.mMap[entry.first];
@@ -290,6 +291,7 @@
     StringAppendF(&result, "isOpaque=%1d, invalidate=%1d, ", isOpaque, invalidate);
     StringAppendF(&result, "dataspace=%s, ", dataspace.c_str());
     StringAppendF(&result, "defaultPixelFormat=%s, ", pixelFormat.c_str());
+    StringAppendF(&result, "backgroundBlurRadius=%1d, ", backgroundBlurRadius);
     StringAppendF(&result, "color=(%.3f,%.3f,%.3f,%.3f), flags=0x%08x, ",
                   static_cast<double>(color.r), static_cast<double>(color.g),
                   static_cast<double>(color.b), static_cast<double>(color.a), flags);
diff --git a/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h b/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h
index 774b0e1..52b9165 100644
--- a/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h
+++ b/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h
@@ -110,6 +110,7 @@
         bool refreshPending;
         bool isProtected;
         float cornerRadius;
+        int backgroundBlurRadius;
         LayerMetadata metadata;
         LayerProtoParser::FloatRect cornerRadiusCrop;
         float shadowRadius;
diff --git a/services/surfaceflinger/layerproto/layers.proto b/services/surfaceflinger/layerproto/layers.proto
index 41ecafa..8afe503 100644
--- a/services/surfaceflinger/layerproto/layers.proto
+++ b/services/surfaceflinger/layerproto/layers.proto
@@ -104,6 +104,8 @@
   ColorTransformProto color_transform = 50;
 
   bool is_relative_of = 51;
+  // Layer's background blur radius in pixels.
+  int32 background_blur_radius = 52;
 }
 
 message PositionProto {
diff --git a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
index 049c872..ed2b220 100644
--- a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
+++ b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
@@ -371,3 +371,12 @@
     access: Readonly
     prop_name: "ro.surface_flinger.support_kernel_idle_timer"
 }
+
+# Indicates whether background blurs are supported.
+prop {
+    api_name: "supports_background_blur"
+    type: Boolean
+    scope: Public
+    access: Readonly
+    prop_name: "ro.surface_flinger.supports_background_blur"
+}
diff --git a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
index 2d52507..d24ad18 100644
--- a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
+++ b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
@@ -104,6 +104,10 @@
     prop_name: "ro.surface_flinger.support_kernel_idle_timer"
   }
   prop {
+    api_name: "supports_background_blur"
+    prop_name: "ro.surface_flinger.supports_background_blur"
+  }
+  prop {
     api_name: "use_color_management"
     prop_name: "ro.surface_flinger.use_color_management"
   }
diff --git a/services/surfaceflinger/tests/LayerTypeAndRenderTypeTransaction_test.cpp b/services/surfaceflinger/tests/LayerTypeAndRenderTypeTransaction_test.cpp
index 71f01b0..3bbd12a 100644
--- a/services/surfaceflinger/tests/LayerTypeAndRenderTypeTransaction_test.cpp
+++ b/services/surfaceflinger/tests/LayerTypeAndRenderTypeTransaction_test.cpp
@@ -18,6 +18,7 @@
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wconversion"
 
+#include <cutils/properties.h>
 #include <gui/BufferItemConsumer.h>
 #include "TransactionTestHarnesses.h"
 
@@ -243,6 +244,41 @@
         shot->expectColor(Rect(right - testArea, bottom - testArea, right, bottom), Color::BLACK);
     }
 }
+
+TEST_P(LayerTypeAndRenderTypeTransactionTest, SetBackgroundBlurRadius) {
+    char value[PROPERTY_VALUE_MAX];
+    property_get("ro.surface_flinger.supports_background_blur", value, "0");
+    if (!atoi(value)) {
+        // This device doesn't support blurs, no-op.
+        return;
+    }
+
+    auto size = 256;
+    auto center = size / 2;
+    auto blurRadius = 50;
+
+    sp<SurfaceControl> backgroundLayer;
+    ASSERT_NO_FATAL_FAILURE(backgroundLayer = createLayer("background", size, size));
+    ASSERT_NO_FATAL_FAILURE(fillLayerColor(backgroundLayer, Color::GREEN, size, size));
+
+    sp<SurfaceControl> leftLayer;
+    ASSERT_NO_FATAL_FAILURE(leftLayer = createLayer("left", size / 2, size));
+    ASSERT_NO_FATAL_FAILURE(fillLayerColor(leftLayer, Color::RED, size / 2, size));
+
+    sp<SurfaceControl> blurLayer;
+    ASSERT_NO_FATAL_FAILURE(blurLayer = createLayer("blur", size, size));
+    ASSERT_NO_FATAL_FAILURE(fillLayerColor(blurLayer, Color::TRANSPARENT, size, size));
+
+    Transaction().setBackgroundBlurRadius(blurLayer, blurRadius).apply();
+
+    auto shot = getScreenCapture();
+    // Edges are mixed
+    shot->expectColor(Rect(center - 1, center - 5, center, center + 5), Color{150, 150, 0, 255},
+                      50 /* tolerance */);
+    shot->expectColor(Rect(center, center - 5, center + 1, center + 5), Color{150, 150, 0, 255},
+                      50 /* tolerance */);
+}
+
 TEST_P(LayerTypeAndRenderTypeTransactionTest, SetColorWithBuffer) {
     sp<SurfaceControl> bufferLayer;
     ASSERT_NO_FATAL_FAILURE(bufferLayer = createLayer("test", 32, 32));
diff --git a/services/surfaceflinger/tests/SurfaceInterceptor_test.cpp b/services/surfaceflinger/tests/SurfaceInterceptor_test.cpp
index 75d0761..4a2ab7c 100644
--- a/services/surfaceflinger/tests/SurfaceInterceptor_test.cpp
+++ b/services/surfaceflinger/tests/SurfaceInterceptor_test.cpp
@@ -53,6 +53,7 @@
 constexpr int32_t RELATIVE_Z = 42;
 constexpr float ALPHA_UPDATE = 0.29f;
 constexpr float CORNER_RADIUS_UPDATE = 0.2f;
+constexpr int BACKGROUND_BLUR_RADIUS_UPDATE = 24;
 constexpr float POSITION_UPDATE = 121;
 const Rect CROP_UPDATE(16, 16, 32, 32);
 const float SHADOW_RADIUS_UPDATE = 35.0f;
@@ -183,6 +184,8 @@
     bool layerUpdateFound(const SurfaceChange& change, bool foundLayer);
     bool cropUpdateFound(const SurfaceChange& change, bool foundCrop);
     bool cornerRadiusUpdateFound(const SurfaceChange& change, bool foundCornerRadius);
+    bool backgroundBlurRadiusUpdateFound(const SurfaceChange& change,
+                                         bool foundBackgroundBlurRadius);
     bool matrixUpdateFound(const SurfaceChange& change, bool foundMatrix);
     bool scalingModeUpdateFound(const SurfaceChange& change, bool foundScalingMode);
     bool transparentRegionHintUpdateFound(const SurfaceChange& change, bool foundTransparentRegion);
@@ -220,6 +223,7 @@
     void layerUpdate(Transaction&);
     void cropUpdate(Transaction&);
     void cornerRadiusUpdate(Transaction&);
+    void backgroundBlurRadiusUpdate(Transaction&);
     void matrixUpdate(Transaction&);
     void overrideScalingModeUpdate(Transaction&);
     void transparentRegionHintUpdate(Transaction&);
@@ -355,6 +359,10 @@
     t.setCornerRadius(mBGSurfaceControl, CORNER_RADIUS_UPDATE);
 }
 
+void SurfaceInterceptorTest::backgroundBlurRadiusUpdate(Transaction& t) {
+    t.setBackgroundBlurRadius(mBGSurfaceControl, BACKGROUND_BLUR_RADIUS_UPDATE);
+}
+
 void SurfaceInterceptorTest::layerUpdate(Transaction& t) {
     t.setLayer(mBGSurfaceControl, LAYER_UPDATE);
 }
@@ -432,6 +440,7 @@
     runInTransaction(&SurfaceInterceptorTest::sizeUpdate);
     runInTransaction(&SurfaceInterceptorTest::alphaUpdate);
     runInTransaction(&SurfaceInterceptorTest::cornerRadiusUpdate);
+    runInTransaction(&SurfaceInterceptorTest::backgroundBlurRadiusUpdate);
     runInTransaction(&SurfaceInterceptorTest::layerUpdate);
     runInTransaction(&SurfaceInterceptorTest::cropUpdate);
     runInTransaction(&SurfaceInterceptorTest::matrixUpdate);
@@ -509,6 +518,18 @@
     return foundCornerRadius;
 }
 
+bool SurfaceInterceptorTest::backgroundBlurRadiusUpdateFound(const SurfaceChange& change,
+                                                             bool foundBackgroundBlur) {
+    bool hasBackgroundBlur(change.background_blur_radius().background_blur_radius() ==
+                           BACKGROUND_BLUR_RADIUS_UPDATE);
+    if (hasBackgroundBlur && !foundBackgroundBlur) {
+        foundBackgroundBlur = true;
+    } else if (hasBackgroundBlur && foundBackgroundBlur) {
+        []() { FAIL(); }();
+    }
+    return foundBackgroundBlur;
+}
+
 bool SurfaceInterceptorTest::layerUpdateFound(const SurfaceChange& change, bool foundLayer) {
     bool hasLayer(change.layer().layer() == LAYER_UPDATE);
     if (hasLayer && !foundLayer) {
@@ -705,6 +726,9 @@
                         case SurfaceChange::SurfaceChangeCase::kCornerRadius:
                             foundUpdate = cornerRadiusUpdateFound(change, foundUpdate);
                             break;
+                        case SurfaceChange::SurfaceChangeCase::kBackgroundBlurRadius:
+                            foundUpdate = backgroundBlurRadiusUpdateFound(change, foundUpdate);
+                            break;
                         case SurfaceChange::SurfaceChangeCase::kMatrix:
                             foundUpdate = matrixUpdateFound(change, foundUpdate);
                             break;
@@ -887,6 +911,11 @@
             SurfaceChange::SurfaceChangeCase::kCornerRadius);
 }
 
+TEST_F(SurfaceInterceptorTest, InterceptBackgroundBlurRadiusUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::backgroundBlurRadiusUpdate,
+                SurfaceChange::SurfaceChangeCase::kBackgroundBlurRadius);
+}
+
 TEST_F(SurfaceInterceptorTest, InterceptMatrixUpdateWorks) {
     captureTest(&SurfaceInterceptorTest::matrixUpdate, SurfaceChange::SurfaceChangeCase::kMatrix);
 }