diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index 4a57b1b..a4de66e 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -18,16 +18,55 @@
 
 #include <inttypes.h>
 
-#include <utils/Errors.h>
 #include <binder/Parcel.h>
-#include <gui/ISurfaceComposerClient.h>
 #include <gui/IGraphicBufferProducer.h>
+#include <gui/ISurfaceComposerClient.h>
 #include <gui/LayerState.h>
+#include <utils/Errors.h>
 
 #include <cmath>
 
 namespace android {
 
+layer_state_t::layer_state_t()
+      : what(0),
+        x(0),
+        y(0),
+        z(0),
+        w(0),
+        h(0),
+        layerStack(0),
+        alpha(0),
+        flags(0),
+        mask(0),
+        reserved(0),
+        crop_legacy(Rect::INVALID_RECT),
+        cornerRadius(0.0f),
+        backgroundBlurRadius(0),
+        barrierFrameNumber(0),
+        overrideScalingMode(-1),
+        transform(0),
+        transformToDisplayInverse(false),
+        crop(Rect::INVALID_RECT),
+        orientedDisplaySpaceRect(Rect::INVALID_RECT),
+        dataspace(ui::Dataspace::UNKNOWN),
+        surfaceDamageRegion(),
+        api(-1),
+        colorTransform(mat4()),
+        bgColorAlpha(0),
+        bgColorDataspace(ui::Dataspace::UNKNOWN),
+        colorSpaceAgnostic(false),
+        shadowRadius(0.0f),
+        frameRateSelectionPriority(-1),
+        frameRate(0.0f),
+        frameRateCompatibility(ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_DEFAULT),
+        fixedTransformHint(ui::Transform::ROT_INVALID),
+        frameNumber(0) {
+    matrix.dsdx = matrix.dtdy = 1.0f;
+    matrix.dsdy = matrix.dtdx = 0.0f;
+    hdrMetadata.validTypes = 0;
+}
+
 status_t layer_state_t::write(Parcel& output) const
 {
     SAFE_PARCEL(output.writeStrongBinder, surface);
@@ -44,13 +83,13 @@
     SAFE_PARCEL(output.writeUint32, mask);
     SAFE_PARCEL(matrix.write, output);
     SAFE_PARCEL(output.write, crop_legacy);
-    SAFE_PARCEL(output.writeStrongBinder, barrierHandle_legacy);
-    SAFE_PARCEL(output.writeStrongBinder, reparentHandle);
+    SAFE_PARCEL(SurfaceControl::writeNullableToParcel, output, barrierSurfaceControl_legacy);
+    SAFE_PARCEL(SurfaceControl::writeNullableToParcel, output, reparentSurfaceControl);
     SAFE_PARCEL(output.writeUint64, barrierFrameNumber);
     SAFE_PARCEL(output.writeInt32, overrideScalingMode);
     SAFE_PARCEL(output.writeStrongBinder, IInterface::asBinder(barrierGbp_legacy));
-    SAFE_PARCEL(output.writeStrongBinder, relativeLayerHandle);
-    SAFE_PARCEL(output.writeStrongBinder, parentHandleForChild);
+    SAFE_PARCEL(SurfaceControl::writeNullableToParcel, output, relativeLayerSurfaceControl);
+    SAFE_PARCEL(SurfaceControl::writeNullableToParcel, output, parentSurfaceControlForChild);
     SAFE_PARCEL(output.writeFloat, color.r);
     SAFE_PARCEL(output.writeFloat, color.g);
     SAFE_PARCEL(output.writeFloat, color.b);
@@ -135,8 +174,8 @@
 
     SAFE_PARCEL(matrix.read, input);
     SAFE_PARCEL(input.read, crop_legacy);
-    SAFE_PARCEL(input.readNullableStrongBinder, &barrierHandle_legacy);
-    SAFE_PARCEL(input.readNullableStrongBinder, &reparentHandle);
+    SAFE_PARCEL(SurfaceControl::readNullableFromParcel, input, &barrierSurfaceControl_legacy);
+    SAFE_PARCEL(SurfaceControl::readNullableFromParcel, input, &reparentSurfaceControl);
     SAFE_PARCEL(input.readUint64, &barrierFrameNumber);
     SAFE_PARCEL(input.readInt32, &overrideScalingMode);
 
@@ -144,9 +183,10 @@
     SAFE_PARCEL(input.readNullableStrongBinder, &tmpBinder);
     barrierGbp_legacy = interface_cast<IGraphicBufferProducer>(tmpBinder);
 
+    SAFE_PARCEL(SurfaceControl::readNullableFromParcel, input, &relativeLayerSurfaceControl);
+    SAFE_PARCEL(SurfaceControl::readNullableFromParcel, input, &parentSurfaceControlForChild);
+
     float tmpFloat = 0;
-    SAFE_PARCEL(input.readNullableStrongBinder, &relativeLayerHandle);
-    SAFE_PARCEL(input.readNullableStrongBinder, &parentHandleForChild);
     SAFE_PARCEL(input.readFloat, &tmpFloat);
     color.r = tmpFloat;
     SAFE_PARCEL(input.readFloat, &tmpFloat);
@@ -342,7 +382,7 @@
     }
     if (other.what & eDeferTransaction_legacy) {
         what |= eDeferTransaction_legacy;
-        barrierHandle_legacy = other.barrierHandle_legacy;
+        barrierSurfaceControl_legacy = other.barrierSurfaceControl_legacy;
         barrierGbp_legacy = other.barrierGbp_legacy;
         barrierFrameNumber = other.barrierFrameNumber;
     }
@@ -352,7 +392,7 @@
     }
     if (other.what & eReparentChildren) {
         what |= eReparentChildren;
-        reparentHandle = other.reparentHandle;
+        reparentSurfaceControl = other.reparentSurfaceControl;
     }
     if (other.what & eDetachChildren) {
         what |= eDetachChildren;
@@ -361,11 +401,11 @@
         what |= eRelativeLayerChanged;
         what &= ~eLayerChanged;
         z = other.z;
-        relativeLayerHandle = other.relativeLayerHandle;
+        relativeLayerSurfaceControl = other.relativeLayerSurfaceControl;
     }
     if (other.what & eReparent) {
         what |= eReparent;
-        parentHandleForChild = other.parentHandleForChild;
+        parentSurfaceControlForChild = other.parentSurfaceControlForChild;
     }
     if (other.what & eDestroySurface) {
         what |= eDestroySurface;
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 2f6a34b..99d9eba 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -875,8 +875,8 @@
     return *this;
 }
 
-SurfaceComposerClient::Transaction& SurfaceComposerClient::Transaction::setRelativeLayer(const sp<SurfaceControl>& sc, const sp<IBinder>& relativeTo,
-        int32_t z) {
+SurfaceComposerClient::Transaction& SurfaceComposerClient::Transaction::setRelativeLayer(
+        const sp<SurfaceControl>& sc, const sp<SurfaceControl>& relativeTo, int32_t z) {
     layer_state_t* s = getLayerState(sc);
     if (!s) {
         mStatus = BAD_INDEX;
@@ -884,7 +884,7 @@
     }
     s->what |= layer_state_t::eRelativeLayerChanged;
     s->what &= ~layer_state_t::eLayerChanged;
-    s->relativeLayerHandle = relativeTo;
+    s->relativeLayerSurfaceControl = relativeTo;
     s->z = z;
 
     registerSurfaceControlForCallback(sc);
@@ -1028,16 +1028,16 @@
 }
 
 SurfaceComposerClient::Transaction&
-SurfaceComposerClient::Transaction::deferTransactionUntil_legacy(const sp<SurfaceControl>& sc,
-                                                                 const sp<IBinder>& handle,
-                                                                 uint64_t frameNumber) {
+SurfaceComposerClient::Transaction::deferTransactionUntil_legacy(
+        const sp<SurfaceControl>& sc, const sp<SurfaceControl>& barrierSurfaceControl,
+        uint64_t frameNumber) {
     layer_state_t* s = getLayerState(sc);
     if (!s) {
         mStatus = BAD_INDEX;
         return *this;
     }
     s->what |= layer_state_t::eDeferTransaction_legacy;
-    s->barrierHandle_legacy = handle;
+    s->barrierSurfaceControl_legacy = barrierSurfaceControl;
     s->barrierFrameNumber = frameNumber;
 
     registerSurfaceControlForCallback(sc);
@@ -1062,30 +1062,28 @@
 }
 
 SurfaceComposerClient::Transaction& SurfaceComposerClient::Transaction::reparentChildren(
-        const sp<SurfaceControl>& sc,
-        const sp<IBinder>& newParentHandle) {
+        const sp<SurfaceControl>& sc, const sp<SurfaceControl>& newParent) {
     layer_state_t* s = getLayerState(sc);
     if (!s) {
         mStatus = BAD_INDEX;
         return *this;
     }
     s->what |= layer_state_t::eReparentChildren;
-    s->reparentHandle = newParentHandle;
+    s->reparentSurfaceControl = newParent;
 
     registerSurfaceControlForCallback(sc);
     return *this;
 }
 
 SurfaceComposerClient::Transaction& SurfaceComposerClient::Transaction::reparent(
-        const sp<SurfaceControl>& sc,
-        const sp<IBinder>& newParentHandle) {
+        const sp<SurfaceControl>& sc, const sp<SurfaceControl>& newParent) {
     layer_state_t* s = getLayerState(sc);
     if (!s) {
         mStatus = BAD_INDEX;
         return *this;
     }
     s->what |= layer_state_t::eReparent;
-    s->parentHandleForChild = newParentHandle;
+    s->parentSurfaceControlForChild = newParent;
 
     registerSurfaceControlForCallback(sc);
     return *this;
diff --git a/libs/gui/SurfaceControl.cpp b/libs/gui/SurfaceControl.cpp
index e37ff89..e842382 100644
--- a/libs/gui/SurfaceControl.cpp
+++ b/libs/gui/SurfaceControl.cpp
@@ -24,6 +24,7 @@
 #include <android/native_window.h>
 
 #include <utils/Errors.h>
+#include <utils/KeyedVector.h>
 #include <utils/Log.h>
 #include <utils/threads.h>
 
diff --git a/libs/gui/include/gui/LayerState.h b/libs/gui/include/gui/LayerState.h
index 65fd9ab..06598e1 100644
--- a/libs/gui/include/gui/LayerState.h
+++ b/libs/gui/include/gui/LayerState.h
@@ -49,6 +49,7 @@
 
 #include <gui/ISurfaceComposer.h>
 #include <gui/LayerMetadata.h>
+#include <gui/SurfaceControl.h>
 #include <math/vec3.h>
 #include <ui/GraphicTypes.h>
 #include <ui/Rect.h>
@@ -128,44 +129,7 @@
         eFrameNumberChanged = 0x400'00000000,
     };
 
-    layer_state_t()
-          : what(0),
-            x(0),
-            y(0),
-            z(0),
-            w(0),
-            h(0),
-            layerStack(0),
-            alpha(0),
-            flags(0),
-            mask(0),
-            reserved(0),
-            crop_legacy(Rect::INVALID_RECT),
-            cornerRadius(0.0f),
-            backgroundBlurRadius(0),
-            barrierFrameNumber(0),
-            overrideScalingMode(-1),
-            transform(0),
-            transformToDisplayInverse(false),
-            crop(Rect::INVALID_RECT),
-            orientedDisplaySpaceRect(Rect::INVALID_RECT),
-            dataspace(ui::Dataspace::UNKNOWN),
-            surfaceDamageRegion(),
-            api(-1),
-            colorTransform(mat4()),
-            bgColorAlpha(0),
-            bgColorDataspace(ui::Dataspace::UNKNOWN),
-            colorSpaceAgnostic(false),
-            shadowRadius(0.0f),
-            frameRateSelectionPriority(-1),
-            frameRate(0.0f),
-            frameRateCompatibility(ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_DEFAULT),
-            fixedTransformHint(ui::Transform::ROT_INVALID),
-            frameNumber(0) {
-        matrix.dsdx = matrix.dtdy = 1.0f;
-        matrix.dsdy = matrix.dtdx = 0.0f;
-        hdrMetadata.validTypes = 0;
-    }
+    layer_state_t();
 
     void merge(const layer_state_t& other);
     status_t write(Parcel& output) const;
@@ -196,16 +160,16 @@
     Rect crop_legacy;
     float cornerRadius;
     uint32_t backgroundBlurRadius;
-    sp<IBinder> barrierHandle_legacy;
-    sp<IBinder> reparentHandle;
+    sp<SurfaceControl> barrierSurfaceControl_legacy;
+    sp<SurfaceControl> reparentSurfaceControl;
     uint64_t barrierFrameNumber;
     int32_t overrideScalingMode;
 
     sp<IGraphicBufferProducer> barrierGbp_legacy;
 
-    sp<IBinder> relativeLayerHandle;
+    sp<SurfaceControl> relativeLayerSurfaceControl;
 
-    sp<IBinder> parentHandleForChild;
+    sp<SurfaceControl> parentSurfaceControlForChild;
 
     half3 color;
 
diff --git a/libs/gui/include/gui/SurfaceComposerClient.h b/libs/gui/include/gui/SurfaceComposerClient.h
index cc82502..f366c29 100644
--- a/libs/gui/include/gui/SurfaceComposerClient.h
+++ b/libs/gui/include/gui/SurfaceComposerClient.h
@@ -424,7 +424,7 @@
         // If the relative is removed, the Surface will have no layer and be
         // invisible, until the next time set(Relative)Layer is called.
         Transaction& setRelativeLayer(const sp<SurfaceControl>& sc,
-                const sp<IBinder>& relativeTo, int32_t z);
+                                      const sp<SurfaceControl>& relativeTo, int32_t z);
         Transaction& setFlags(const sp<SurfaceControl>& sc,
                 uint32_t flags, uint32_t mask);
         Transaction& setTransparentRegionHint(const sp<SurfaceControl>& sc,
@@ -444,7 +444,8 @@
         // by handle is removed, then we will apply this transaction regardless of
         // what frame number has been reached.
         Transaction& deferTransactionUntil_legacy(const sp<SurfaceControl>& sc,
-                                                  const sp<IBinder>& handle, uint64_t frameNumber);
+                                                  const sp<SurfaceControl>& barrierSurfaceControl,
+                                                  uint64_t frameNumber);
         // A variant of deferTransactionUntil_legacy which identifies the Layer we wait for by
         // Surface instead of Handle. Useful for clients which may not have the
         // SurfaceControl for some of their Surfaces. Otherwise behaves identically.
@@ -453,13 +454,12 @@
                                                   uint64_t frameNumber);
         // Reparents all children of this layer to the new parent handle.
         Transaction& reparentChildren(const sp<SurfaceControl>& sc,
-                const sp<IBinder>& newParentHandle);
+                                      const sp<SurfaceControl>& newParent);
 
         /// Reparents the current layer to the new parent handle. The new parent must not be null.
         // This can be used instead of reparentChildren if the caller wants to
         // only re-parent a specific child.
-        Transaction& reparent(const sp<SurfaceControl>& sc,
-                const sp<IBinder>& newParentHandle);
+        Transaction& reparent(const sp<SurfaceControl>& sc, const sp<SurfaceControl>& newParent);
 
         Transaction& setColor(const sp<SurfaceControl>& sc, const half3& color);
 
diff --git a/libs/gui/include/gui/SurfaceControl.h b/libs/gui/include/gui/SurfaceControl.h
index c0dfcdb..35bdfc1 100644
--- a/libs/gui/include/gui/SurfaceControl.h
+++ b/libs/gui/include/gui/SurfaceControl.h
@@ -20,7 +20,6 @@
 #include <stdint.h>
 #include <sys/types.h>
 
-#include <utils/KeyedVector.h>
 #include <utils/RefBase.h>
 #include <utils/threads.h>
 
diff --git a/libs/gui/tests/EndToEndNativeInputTest.cpp b/libs/gui/tests/EndToEndNativeInputTest.cpp
index ef4d870..483f171 100644
--- a/libs/gui/tests/EndToEndNativeInputTest.cpp
+++ b/libs/gui/tests/EndToEndNativeInputTest.cpp
@@ -381,7 +381,7 @@
 
     childSurface->doTransaction([&](auto &t, auto &sc) {
         t.setPosition(sc, -5, -5);
-        t.reparent(sc, parentSurface->mSurfaceControl->getHandle());
+        t.reparent(sc, parentSurface->mSurfaceControl);
     });
 
     injectTap(106, 106);