diff --git a/contexthub/1.0/Android.bp b/contexthub/1.0/Android.bp
new file mode 100644
index 0000000..23c44de
--- /dev/null
+++ b/contexthub/1.0/Android.bp
@@ -0,0 +1,59 @@
+// This file is autogenerated by hidl-gen. Do not edit manually.
+
+genrule {
+    name: "android.hardware.contexthub@1.0_genc++",
+    tools: ["hidl-gen"],
+    cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces android.hardware.contexthub@1.0",
+    srcs: [
+        "types.hal",
+        "IContexthub.hal",
+        "IContexthubCallback.hal",
+    ],
+    out: [
+        "android/hardware/contexthub/1.0/types.cpp",
+        "android/hardware/contexthub/1.0/ContexthubAll.cpp",
+        "android/hardware/contexthub/1.0/ContexthubCallbackAll.cpp",
+    ],
+}
+
+genrule {
+    name: "android.hardware.contexthub@1.0_genc++_headers",
+    tools: ["hidl-gen"],
+    cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces android.hardware.contexthub@1.0",
+    srcs: [
+        "types.hal",
+        "IContexthub.hal",
+        "IContexthubCallback.hal",
+    ],
+    out: [
+        "android/hardware/contexthub/1.0/types.h",
+        "android/hardware/contexthub/1.0/IContexthub.h",
+        "android/hardware/contexthub/1.0/IHwContexthub.h",
+        "android/hardware/contexthub/1.0/BnContexthub.h",
+        "android/hardware/contexthub/1.0/BpContexthub.h",
+        "android/hardware/contexthub/1.0/BsContexthub.h",
+        "android/hardware/contexthub/1.0/IContexthubCallback.h",
+        "android/hardware/contexthub/1.0/IHwContexthubCallback.h",
+        "android/hardware/contexthub/1.0/BnContexthubCallback.h",
+        "android/hardware/contexthub/1.0/BpContexthubCallback.h",
+        "android/hardware/contexthub/1.0/BsContexthubCallback.h",
+    ],
+}
+
+cc_library_shared {
+    name: "android.hardware.contexthub@1.0",
+    generated_sources: ["android.hardware.contexthub@1.0_genc++"],
+    generated_headers: ["android.hardware.contexthub@1.0_genc++_headers"],
+    export_generated_headers: ["android.hardware.contexthub@1.0_genc++_headers"],
+    shared_libs: [
+        "libhidl",
+        "libhwbinder",
+        "libutils",
+        "libcutils",
+    ],
+    export_shared_lib_headers: [
+        "libhidl",
+        "libhwbinder",
+        "libutils",
+    ],
+}
diff --git a/contexthub/1.0/Android.mk b/contexthub/1.0/Android.mk
new file mode 100644
index 0000000..72291e6
--- /dev/null
+++ b/contexthub/1.0/Android.mk
@@ -0,0 +1,552 @@
+# This file is autogenerated by hidl-gen. Do not edit manually.
+
+LOCAL_PATH := $(call my-dir)
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.contexthub@1.0-java
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(local-generated-sources-dir)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+#
+# Build types.hal (AsyncEventType)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/AsyncEventType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.AsyncEventType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (ContextHub)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/ContextHub.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.ContextHub
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (ContextHubMsg)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/ContextHubMsg.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.ContextHubMsg
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (HubAppInfo)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/HubAppInfo.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.HubAppInfo
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (HubMemoryFlag)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/HubMemoryFlag.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.HubMemoryFlag
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (HubMemoryType)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/HubMemoryType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.HubMemoryType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (MemRange)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/MemRange.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.MemRange
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (NanoAppBinary)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/NanoAppBinary.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.NanoAppBinary
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (NanoAppFlags)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/NanoAppFlags.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.NanoAppFlags
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (PhysicalSensor)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/PhysicalSensor.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.PhysicalSensor
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (Result)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/Result.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.Result
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (SensorType)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/SensorType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.SensorType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TransactionResult)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/TransactionResult.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.TransactionResult
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build IContexthub.hal
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/IContexthub.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IContexthub.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/IContexthubCallback.hal
+$(GEN): $(LOCAL_PATH)/IContexthubCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::IContexthub
+
+$(GEN): $(LOCAL_PATH)/IContexthub.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build IContexthubCallback.hal
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/IContexthubCallback.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IContexthubCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::IContexthubCallback
+
+$(GEN): $(LOCAL_PATH)/IContexthubCallback.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_JAVA_LIBRARY)
+
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.contexthub@1.0-java-static
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(local-generated-sources-dir)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+#
+# Build types.hal (AsyncEventType)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/AsyncEventType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.AsyncEventType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (ContextHub)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/ContextHub.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.ContextHub
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (ContextHubMsg)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/ContextHubMsg.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.ContextHubMsg
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (HubAppInfo)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/HubAppInfo.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.HubAppInfo
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (HubMemoryFlag)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/HubMemoryFlag.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.HubMemoryFlag
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (HubMemoryType)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/HubMemoryType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.HubMemoryType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (MemRange)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/MemRange.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.MemRange
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (NanoAppBinary)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/NanoAppBinary.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.NanoAppBinary
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (NanoAppFlags)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/NanoAppFlags.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.NanoAppFlags
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (PhysicalSensor)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/PhysicalSensor.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.PhysicalSensor
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (Result)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/Result.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.Result
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (SensorType)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/SensorType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.SensorType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TransactionResult)
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/TransactionResult.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::types.TransactionResult
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build IContexthub.hal
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/IContexthub.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IContexthub.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/IContexthubCallback.hal
+$(GEN): $(LOCAL_PATH)/IContexthubCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::IContexthub
+
+$(GEN): $(LOCAL_PATH)/IContexthub.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build IContexthubCallback.hal
+#
+GEN := $(intermediates)/android/hardware/contexthub/1.0/IContexthubCallback.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IContexthubCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.contexthub@1.0::IContexthubCallback
+
+$(GEN): $(LOCAL_PATH)/IContexthubCallback.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/contexthub/1.0/IContexthub.hal b/contexthub/1.0/IContexthub.hal
new file mode 100644
index 0000000..8d19aeb
--- /dev/null
+++ b/contexthub/1.0/IContexthub.hal
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2016 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 android.hardware.contexthub@1.0;
+
+import IContexthubCallback;
+
+interface IContexthub {
+    /*
+     * Enumerate all available context hubs on the system.
+     *
+     * @return hubs list of hubs on this system.
+     */
+    getHubs() generates (vec<ContextHub> hubs);
+
+    /*
+     * Register a callback for the HAL implementation to send asynchronous
+     * messages to the service from a context hub. There can be a maximum of
+     * one callback registered with the HAL. A call to this function when a
+     * callback has already been registered must override the previous
+     * registration.
+     *
+     * @param hubId    identifier for the hub
+     *        callback an implementation of the IContextHubCallbacks
+     *
+     * @return result OK on success
+     *                BAD_VALUE if parameters are not sane
+     *
+     */
+     registerCallback(uint32_t hubId, IContexthubCallback cb) generates (Result result);
+
+    /**
+     * Send a message to a hub
+     *
+     * @param hubId identifier for hub to send message to
+     *        msg   message to be sent
+     *
+     * @return result OK if successful, error code otherwise
+     *                BAD_VALUE if parameters are not sane
+     *                TRANSACTION_FAILED if message send failed
+     */
+    sendMessageToHub(uint32_t hubId, ContextHubMsg msg)
+            generates (Result result);
+
+    /**
+     * Loads a nanoApp. After loading, the nanoApp's init method must be called.
+     * After the init method for nanoApp returns success, this must be indicated
+     * to the service by an asynchronous call to handleTxnResult.
+     *
+     * @param hubId identifer of the contextHub
+     *        appBinary binary for the nanoApp
+     *        msg   message to be sent
+     *
+     * @return result OK if transation started
+     *                BAD_VALUE if parameters are not sane
+     *                TRANSACTION_PENDING if hub is busy with another
+     *                                    load/unload transaction
+     *                TRANSACTION_FAILED if load failed synchronously
+     *
+     */
+    loadNanoApp(uint32_t hubId, NanoAppBinary appBinary, uint32_t transactionId)
+            generates (Result result);
+
+    /**
+     * Unloads a nanoApp. Before the unload, the apps deinit method is called.
+     * After this, success must be indicated to the service through an
+     * asynchronous call to handleTxnResult.
+     *
+     * @param hubId identifer of the contextHub
+     *        appId appIdentifier returned by the HAL
+     *        msg   message to be sent
+     *
+     * @return result OK if transation started
+     *                BAD_VALUE if parameters are not sane
+     *                TRANSACTION_PENDING if hub is busy with another
+     *                                    load/unload transaction
+     *                TRANSACTION_FAILED if unload failed synchronously
+     *
+     */
+    unloadNanoApp(uint32_t hubId, uint64_t appId, uint32_t transactionId)
+            generates (Result result);
+
+    /**
+     * Enables a nanoApp. The app's init method is called.
+     * After this, success must be indicated to the service through an
+     * asynchronous message.
+     *
+     * @param hubId identifer of the contextHub
+     *        appId appIdentifier returned by the HAL
+     *        msg   message to be sent
+     *
+     * @return result OK if transation started
+     *                BAD_VALUE if parameters are not sane
+     *                TRANSACTION_PENDING if hub is busy with another
+     *                                    load/unload transaction
+     *                FAILED_TRANSACTION if load fails immediately
+     *
+     */
+    enableNanoApp(uint32_t hubId, uint64_t appId, uint32_t transactionId)
+            generates (Result result);
+
+    /**
+     * Disables a nanoApp. The app's deinit method is called.
+     * After this, success must be indicated to the service through an
+     * asynchronous message.
+     *
+     * @param hubId identifer of the contextHub
+     *        appId appIdentifier returned by the HAL
+     *        msg   message to be sent
+     *
+     * @return result OK if transation started
+     *                BAD_VALUE if parameters are not sane
+     *                TRANSACTION_PENDING if hub is busy with another
+     *                                    load/unload transaction
+     *                FAILED_TRANSACTION if load fails immediately
+     *
+     */
+    disableNanoApp(uint32_t hubId, uint64_t appId, uint32_t transactionId)
+            generates (Result result);
+
+    /**
+     * Queries for Loaded apps on the hub
+     *
+     * @param hubId identifer of the contextHub
+     *
+     * @return apps all nanoApps on the hub
+     *
+     */
+    queryApps(uint32_t hubId) generates (Result result);
+
+    /**
+     * Reboots context hub OS, restarts all the nanoApps.
+     * No reboot notification is sent to nanoApps; reboot happens immediately
+     * and unconditionally; all volatile contexthub state and any data is lost
+     * as a result.
+     *
+     * @param hubId identifer of the contextHub
+     *
+     * @return result OK on success
+     *                BAD_VALUE if parameters are not sane
+     *
+     */
+    reboot(uint32_t hubId) generates (Result result);
+};
diff --git a/contexthub/1.0/IContexthubCallback.hal b/contexthub/1.0/IContexthubCallback.hal
new file mode 100644
index 0000000..29c41ce
--- /dev/null
+++ b/contexthub/1.0/IContexthubCallback.hal
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2016 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 android.hardware.contexthub@1.0;
+
+interface IContexthubCallback {
+    /*
+     * This callback is passed by the Contexthub service to the HAL
+     * implementation to allow the HAL to send asynchronous messages back
+     * to the service and registered clients of the ContextHub service.
+     *
+     * @params hubId : identifier of the hub calling callback
+     *         msg   : message
+     *
+     */
+     handleClientMsg(uint32_t hubId, ContextHubMsg msg);
+
+    /*
+     * This callback is passed by the Contexthub service to the HAL
+     * implementation to allow the HAL to send the response for a
+     * transaction.
+     *
+     * @params hubId : identifier of the hub calling callback
+     *         txnId : transaction id whose result is being sent
+     *                 passed in by the service at start of transacation.
+     *         result: result of transaction.
+     *
+     */
+     handleTxnResult(uint32_t hubId, uint32_t txnId,
+             TransactionResult result);
+
+    /*
+     * This callback is passed by the Contexthub service to the HAL
+     * implementation to allow the HAL to send an asynchronous event
+     * to the ContextHub service.
+     *
+     * @params hubId : identifier of the hub calling callback
+     *         msg   : message
+     *
+     */
+     handleHubEvent(uint32_t hubId, AsyncEventType evt);
+
+     /*
+      * This callback is passed by the Contexthub service to the HAL
+      * implementation to allow the HAL to send information about the
+      * currently loaded and active nanoapps on the hub.
+      */
+      handleAppsInfo(uint32_t hubId, vec<HubAppInfo> appInfo);
+};
diff --git a/contexthub/1.0/types.hal b/contexthub/1.0/types.hal
new file mode 100644
index 0000000..7d5a1ac
--- /dev/null
+++ b/contexthub/1.0/types.hal
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2016 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 android.hardware.contexthub@1.0;
+
+enum Result : uint32_t {
+    OK,                  // Success
+    BAD_PARAMS,          // Parameters not sane
+    NOT_INIT,            // not initialized
+    TRANSACTION_FAILED,  // transaction failed
+    TRANSACTION_PENDING, // Pending transaction, cannot accept a new request
+};
+
+
+enum NanoAppFlags : uint32_t {
+    SIGNED = (1<<0),   // Signed nanoapp
+    ENCRYPTED = (1<<1),// Encrypted nanoapp
+};
+
+struct NanoAppBinary {
+    uint32_t headerVersion;    // 0x1 for this version
+    uint32_t magic;            // "NANO"
+    uint64_t appId;            // App Id contains vendor id
+    uint32_t appVersion;       // Version of the app
+    uint32_t flags;            // mask of NanoAppFlags
+    uint64_t hwHubType;        // which hub type is this compiled for
+                               // a unique UUID for each h/w + toolchain
+                               // combination.
+    vec<uint8_t> customBinary; // start of custom binary data
+};
+
+enum SensorType : uint32_t {
+    RESERVED,
+    ACCELEROMETER,
+    GYROSCOPE,
+    MAGNETOMETER,
+    BAROMETER,
+    PROXIMITY_SENSOR,
+    AMBIENT_LIGHT_SENSOR,
+
+    GPS = 0x100,
+    // Reserving this space for variants on GPS
+
+    WIFI = 0x200,
+    // Reserving this space for variants on WIFI
+
+    AUDIO = 0x300,
+    // Reserving this space for variants on Audio
+
+    CAMERA = 0x400,
+    // Reserving this space for variants on Camera
+
+    BLE = 0x500,
+
+    PRIVATE_SENSOR_BASE = 0x10000,
+    // Sensor types beyond PRIVATE_SENSOR_BASE are custom types
+};
+
+struct PhysicalSensor{
+    SensorType sensorType;       // From the definitions above eg: 100
+    string type;                 // Type as a string. eg: "GPS"
+    string name;                 // Identifier eg: "Bosch BMI160"
+    string vendor;               // Vendor : eg "STM"
+    uint32_t version;            // Version : eg 0x1001
+    uint32_t fifoReservedCount;  // Batching possible in hardware. Please
+                                 // note that here hardware does not include
+                                 // the context hub itself. Thus, this
+                                 // definition may be different from say the
+                                 // number advertised in the sensors HAL
+                                 // which allows for batching in a hub.
+    uint32_t fifoMaxCount;       // maximum number of batchable events.
+    uint64_t minDelayMs;         // in milliseconds, corresponding to highest
+                                 // sampling freq.
+    uint64_t maxDelayMs;         // in milliseconds, corresponds to minimum
+                                 // sampling frequency
+    float peakPowerMw;           // At max frequency & no batching, power
+                                 // in milliwatts
+};
+
+struct ContextHub {
+    string name;                // descriptive name eg: "Awesome Hub #1"
+    string vendor;              // hub hardware vendor eg: "Qualcomm"
+    string toolchain;           // toolchain to make binaries eg: "gcc ARM"
+    uint32_t platformVersion;   // Version of the hardware : eg 0x20
+    uint32_t toolchainVersion;  // Version of the toolchain : eg: 0x484
+    uint32_t hubId;             // a device unique id for this hub
+
+    float peakMips;             // Peak MIPS platform can deliver
+    float stoppedPowerDrawMw;   // if stopped, retention power, milliwatts
+    float sleepPowerDrawMw;     // if sleeping, retention power, milliwatts
+    float peakPowerDrawMw;      // for a busy CPUm power in milliwatts
+
+    vec<PhysicalSensor> connectedSensors; // array of connected sensors
+
+    uint32_t maxSupportedMsgLen;// This is the maximum size of the message that can
+                                // be sent to the hub in one chunk (in bytes)
+};
+
+struct ContextHubMsg {
+    uint64_t appName; // intended recipient
+    uint32_t msgType; // identifier for message
+    vec<uint8_t> msg; // message body
+};
+
+enum HubMemoryType : uint32_t {
+    MAIN      = 0, // Main memory
+    SECONDARY = 1, // Secondary memory
+    TCM       = 2, // Tightly coupled memory
+};
+
+enum HubMemoryFlag : uint32_t {
+    READ  = (1<<0), // Readable
+    WRITE = (1<<1), // Writable
+    EXEC  = (1<<2), // Executable
+};
+
+struct MemRange {
+    uint32_t totalBytes; // total capacity in bytes
+    uint32_t freeBytes;  // free capacity in bytes
+    HubMemoryType type;  // type of memory, see HubMemoryType
+    uint32_t flags;      // mask of HubMemoryFlag
+};
+
+enum AsyncEventType : uint32_t {
+    RESTARTED = 1, // Hub restarted unexpectedly
+};
+
+enum TransactionResult {
+    SUCCESS,      // successful completion of transaction
+    FAILURE,      // failed transaction
+};
+
+struct HubAppInfo {
+    uint64_t appId;         // Identifier of the app
+    uint32_t version;       // version of the app
+    vec<MemRange> memUsage; // Memory used by this app
+};
+
diff --git a/contexthub/Android.bp b/contexthub/Android.bp
new file mode 100644
index 0000000..bbb3e4b
--- /dev/null
+++ b/contexthub/Android.bp
@@ -0,0 +1,4 @@
+// This is an autogenerated file, do not edit.
+subdirs = [
+    "1.0",
+]
diff --git a/graphics/allocator/2.0/IAllocator.hal b/graphics/allocator/2.0/IAllocator.hal
index 8accb82..ff08a7e 100644
--- a/graphics/allocator/2.0/IAllocator.hal
+++ b/graphics/allocator/2.0/IAllocator.hal
@@ -26,11 +26,16 @@
          * is supported.
          */
         TEST_ALLOCATE = 1,
+
+        /*
+         * layerCount must be 1 unless this capability is supported.
+         */
+        LAYERED_BUFFERS = 2,
     };
 
     struct BufferDescriptorInfo {
         /*
-         * The width specifies how many columns of pixels should be in the
+         * The width specifies how many columns of pixels must be in the
          * allocated buffer, but does not necessarily represent the offset in
          * columns between the same column in adjacent rows. The rows may be
          * padded.
@@ -38,11 +43,16 @@
         uint32_t width;
 
        /*
-        * The height specifies how many rows of pixels should be in the
+        * The height specifies how many rows of pixels must be in the
         * allocated buffer.
         */
         uint32_t height;
 
+       /*
+        * The number of image layers that must be in the allocated buffer.
+        */
+        uint32_t layerCount;
+
         /* Buffer pixel format. */
         PixelFormat format;
 
diff --git a/graphics/allocator/2.0/default/Gralloc.cpp b/graphics/allocator/2.0/default/Gralloc.cpp
index a7fc6c1..8a74661 100644
--- a/graphics/allocator/2.0/default/Gralloc.cpp
+++ b/graphics/allocator/2.0/default/Gralloc.cpp
@@ -74,6 +74,7 @@
         GRALLOC1_PFN_DESTROY_DESCRIPTOR destroyDescriptor;
         GRALLOC1_PFN_SET_DIMENSIONS setDimensions;
         GRALLOC1_PFN_SET_FORMAT setFormat;
+        GRALLOC1_PFN_SET_LAYER_COUNT setLayerCount;
         GRALLOC1_PFN_SET_CONSUMER_USAGE setConsumerUsage;
         GRALLOC1_PFN_SET_PRODUCER_USAGE setProducerUsage;
         GRALLOC1_PFN_ALLOCATE allocate;
@@ -135,6 +136,10 @@
             GRALLOC1_FUNCTION_DESTROY_DESCRIPTOR);
     initDispatch(mDispatch.setDimensions, GRALLOC1_FUNCTION_SET_DIMENSIONS);
     initDispatch(mDispatch.setFormat, GRALLOC1_FUNCTION_SET_FORMAT);
+    if (hasCapability(Capability::LAYERED_BUFFERS)) {
+        initDispatch(
+                mDispatch.setLayerCount, GRALLOC1_FUNCTION_SET_LAYER_COUNT);
+    }
     initDispatch(mDispatch.setConsumerUsage,
             GRALLOC1_FUNCTION_SET_CONSUMER_USAGE);
     initDispatch(mDispatch.setProducerUsage,
@@ -191,6 +196,11 @@
         err = mDispatch.setFormat(mDevice, descriptor,
                 static_cast<int32_t>(descriptorInfo.format));
     }
+    if (err == GRALLOC1_ERROR_NONE &&
+            hasCapability(Capability::LAYERED_BUFFERS)) {
+        err = mDispatch.setLayerCount(mDevice, descriptor,
+                descriptorInfo.layerCount);
+    }
     if (err == GRALLOC1_ERROR_NONE) {
         uint64_t producerUsageMask = descriptorInfo.producerUsageMask;
         if (producerUsageMask & GRALLOC1_PRODUCER_USAGE_CPU_READ_OFTEN) {
diff --git a/graphics/mapper/2.0/default/GrallocMapper.cpp b/graphics/mapper/2.0/default/GrallocMapper.cpp
index eeca5c7..2af1d2c 100644
--- a/graphics/mapper/2.0/default/GrallocMapper.cpp
+++ b/graphics/mapper/2.0/default/GrallocMapper.cpp
@@ -15,10 +15,13 @@
 
 #define LOG_TAG "GrallocMapperPassthrough"
 
+#include <android/hardware/graphics/allocator/2.0/IAllocator.h>
 #include <android/hardware/graphics/mapper/2.0/IMapper.h>
 #include <hardware/gralloc1.h>
 #include <log/log.h>
 
+#include <unordered_set>
+
 namespace android {
 namespace hardware {
 namespace graphics {
@@ -26,6 +29,8 @@
 namespace V2_0 {
 namespace implementation {
 
+using Capability = allocator::V2_0::IAllocator::Capability;
+
 class GrallocDevice : public Device {
 public:
     GrallocDevice();
@@ -38,6 +43,8 @@
             uint32_t* outWidth, uint32_t* outHeight);
     Error getFormat(const native_handle_t* bufferHandle,
             PixelFormat* outFormat);
+    Error getLayerCount(const native_handle_t* bufferHandle,
+            uint32_t* outLayerCount);
     Error getProducerUsageMask(const native_handle_t* bufferHandle,
             uint64_t* outUsageMask);
     Error getConsumerUsageMask(const native_handle_t* bufferHandle,
@@ -58,15 +65,21 @@
             int32_t* outReleaseFence);
 
 private:
+    void initCapabilities();
+
     void initDispatch();
+    bool hasCapability(Capability capability) const;
 
     gralloc1_device_t* mDevice;
 
+    std::unordered_set<Capability> mCapabilities;
+
     struct {
         GRALLOC1_PFN_RETAIN retain;
         GRALLOC1_PFN_RELEASE release;
         GRALLOC1_PFN_GET_DIMENSIONS getDimensions;
         GRALLOC1_PFN_GET_FORMAT getFormat;
+        GRALLOC1_PFN_GET_LAYER_COUNT getLayerCount;
         GRALLOC1_PFN_GET_PRODUCER_USAGE getProducerUsage;
         GRALLOC1_PFN_GET_CONSUMER_USAGE getConsumerUsage;
         GRALLOC1_PFN_GET_BACKING_STORE getBackingStore;
@@ -96,6 +109,7 @@
         LOG_ALWAYS_FATAL("failed to open gralloc1 device");
     }
 
+    initCapabilities();
     initDispatch();
 }
 
@@ -104,6 +118,19 @@
     gralloc1_close(mDevice);
 }
 
+void GrallocDevice::initCapabilities()
+{
+    uint32_t count;
+    mDevice->getCapabilities(mDevice, &count, nullptr);
+
+    std::vector<Capability> caps(count);
+    mDevice->getCapabilities(mDevice, &count, reinterpret_cast<
+              std::underlying_type<Capability>::type*>(caps.data()));
+    caps.resize(count);
+
+    mCapabilities.insert(caps.cbegin(), caps.cend());
+}
+
 void GrallocDevice::initDispatch()
 {
 #define CHECK_FUNC(func, desc) do {                                   \
@@ -118,6 +145,9 @@
     CHECK_FUNC(release, GRALLOC1_FUNCTION_RELEASE);
     CHECK_FUNC(getDimensions, GRALLOC1_FUNCTION_GET_DIMENSIONS);
     CHECK_FUNC(getFormat, GRALLOC1_FUNCTION_GET_FORMAT);
+    if (hasCapability(Capability::LAYERED_BUFFERS)) {
+        CHECK_FUNC(getLayerCount, GRALLOC1_FUNCTION_GET_LAYER_COUNT);
+    }
     CHECK_FUNC(getProducerUsage, GRALLOC1_FUNCTION_GET_PRODUCER_USAGE);
     CHECK_FUNC(getConsumerUsage, GRALLOC1_FUNCTION_GET_CONSUMER_USAGE);
     CHECK_FUNC(getBackingStore, GRALLOC1_FUNCTION_GET_BACKING_STORE);
@@ -130,6 +160,11 @@
 #undef CHECK_FUNC
 }
 
+bool GrallocDevice::hasCapability(Capability capability) const
+{
+    return (mCapabilities.count(capability) > 0);
+}
+
 Error GrallocDevice::retain(const native_handle_t* bufferHandle)
 {
     int32_t error = mDispatch.retain(mDevice, bufferHandle);
@@ -158,6 +193,19 @@
     return static_cast<Error>(error);
 }
 
+Error GrallocDevice::getLayerCount(const native_handle_t* bufferHandle,
+        uint32_t* outLayerCount)
+{
+    if (hasCapability(Capability::LAYERED_BUFFERS)) {
+        int32_t error = mDispatch.getLayerCount(mDevice, bufferHandle,
+                outLayerCount);
+        return static_cast<Error>(error);
+    } else {
+        *outLayerCount = 1;
+        return Error::NONE;
+    }
+}
+
 Error GrallocDevice::getProducerUsageMask(const native_handle_t* bufferHandle,
         uint64_t* outUsageMask)
 {
@@ -238,6 +286,7 @@
         .release = release,
         .getDimensions = getDimensions,
         .getFormat = getFormat,
+        .getLayerCount = getLayerCount,
         .getProducerUsageMask = getProducerUsageMask,
         .getConsumerUsageMask = getConsumerUsageMask,
         .getBackingStore = getBackingStore,
@@ -296,6 +345,12 @@
         return cast(device)->getFormat(bufferHandle, outFormat);
     }
 
+    static Error getLayerCount(Device* device,
+            const native_handle_t* bufferHandle, uint32_t* outLayerCount)
+    {
+        return cast(device)->getLayerCount(bufferHandle, outLayerCount);
+    }
+
     static Error getProducerUsageMask(Device* device,
             const native_handle_t* bufferHandle, uint64_t* outUsageMask)
     {
diff --git a/graphics/mapper/2.0/include/android/hardware/graphics/mapper/2.0/IMapper.h b/graphics/mapper/2.0/include/android/hardware/graphics/mapper/2.0/IMapper.h
index 23faa80..ac8ec45 100644
--- a/graphics/mapper/2.0/include/android/hardware/graphics/mapper/2.0/IMapper.h
+++ b/graphics/mapper/2.0/include/android/hardware/graphics/mapper/2.0/IMapper.h
@@ -128,6 +128,21 @@
                                PixelFormat* outFormat);
 
     /*
+     * Gets the number of layers of the buffer.
+     *
+     * See IAllocator::BufferDescriptorInfo for more information.
+     *
+     * @param device is the mapper device.
+     * @param bufferHandle is the buffer from which to get format.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return layerCount is the number of layers of the buffer.
+     */
+    typedef Error (*getLayerCount)(Device* device,
+                               const native_handle_t* bufferHandle,
+                               uint32_t* outLayerCount);
+
+    /*
      * Gets the producer usage flags which were used to allocate this buffer.
      *
      * See IAllocator::BufferDescriptorInfo for more information.
@@ -364,6 +379,7 @@
     Device::release release;
     Device::getDimensions getDimensions;
     Device::getFormat getFormat;
+    Device::getLayerCount getLayerCount;
     Device::getProducerUsageMask getProducerUsageMask;
     Device::getConsumerUsageMask getConsumerUsageMask;
     Device::getBackingStore getBackingStore;