diff --git a/graphics/composer/2.4/utils/command-buffer/include/composer-command-buffer/2.4/ComposerCommandBuffer.h b/graphics/composer/2.4/utils/command-buffer/include/composer-command-buffer/2.4/ComposerCommandBuffer.h
index e84779e..eb35e5c 100644
--- a/graphics/composer/2.4/utils/command-buffer/include/composer-command-buffer/2.4/ComposerCommandBuffer.h
+++ b/graphics/composer/2.4/utils/command-buffer/include/composer-command-buffer/2.4/ComposerCommandBuffer.h
@@ -53,6 +53,27 @@
         writeSigned(static_cast<int32_t>(clientTargetProperty.dataspace));
         endCommand();
     }
+
+    void setLayerGenericMetadata(const hidl_string& key, const bool mandatory,
+                                 const hidl_vec<uint8_t>& value) {
+        const size_t commandSize = 3 + sizeToElements(key.size()) + sizeToElements(value.size());
+        if (commandSize > std::numeric_limits<uint16_t>::max()) {
+            LOG_FATAL("Too much generic metadata (%zu elements)", commandSize);
+            return;
+        }
+
+        beginCommand(IComposerClient::Command::SET_LAYER_GENERIC_METADATA,
+                     static_cast<uint16_t>(commandSize));
+        write(key.size());
+        writeBlob(key.size(), reinterpret_cast<const unsigned char*>(key.c_str()));
+        write(mandatory);
+        write(value.size());
+        writeBlob(value.size(), value.data());
+        endCommand();
+    }
+
+  protected:
+    uint32_t sizeToElements(uint32_t size) { return (size + 3) / 4; }
 };
 
 // This class helps parse a command queue.  Note that all sizes/lengths are in
diff --git a/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerClient.h b/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerClient.h
index c864ce6..c889069 100644
--- a/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerClient.h
+++ b/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerClient.h
@@ -164,6 +164,14 @@
         return mHal->setContentType(display, contentType);
     }
 
+    Return<void> getLayerGenericMetadataKeys(
+            IComposerClient::getLayerGenericMetadataKeys_cb hidl_cb) override {
+        std::vector<IComposerClient::LayerGenericMetadataKey> keys;
+        Error error = mHal->getLayerGenericMetadataKeys(&keys);
+        hidl_cb(error, keys);
+        return Void();
+    }
+
     static std::unique_ptr<ComposerClientImpl> create(Hal* hal) {
         auto client = std::make_unique<ComposerClientImpl>(hal);
         return client->init() ? std::move(client) : nullptr;
diff --git a/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerCommandEngine.h b/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerCommandEngine.h
index e0153ce..697d6b8 100644
--- a/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerCommandEngine.h
+++ b/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerCommandEngine.h
@@ -74,6 +74,43 @@
 
     CommandWriterBase* getWriter() { return static_cast<CommandWriterBase*>(mWriter.get()); }
 
+    bool executeCommand(V2_1::IComposerClient::Command command, uint16_t length) override {
+        switch (static_cast<IComposerClient::Command>(command)) {
+            case IComposerClient::Command::SET_LAYER_GENERIC_METADATA:
+                return executeSetLayerGenericMetadata(length);
+            default:
+                return BaseType2_3::executeCommand(command, length);
+        }
+    }
+
+    bool executeSetLayerGenericMetadata(uint16_t length) {
+        // We expect at least two buffer lengths and a mandatory flag
+        if (length < 3) {
+            return false;
+        }
+
+        const uint32_t keySize = read();
+        std::string key;
+        key.resize(keySize);
+        readBlob(keySize, key.data());
+
+        const bool mandatory = read();
+
+        const uint32_t valueSize = read();
+        std::vector<uint8_t> value(valueSize);
+        readBlob(valueSize, value.data());
+
+        auto error = mHal->setLayerGenericMetadata(mCurrentDisplay, mCurrentLayer, key, mandatory,
+                                                   value);
+        if (error != Error::NONE) {
+            // The error cast is safe because setLayerGenericMetadata doesn't
+            // return any of the new values added in V2_4::Error
+            mWriter->setError(getCommandLoc(), static_cast<V2_1::Error>(error));
+        }
+
+        return true;
+    }
+
     ComposerHal* mHal;
 };
 
diff --git a/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerHal.h b/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerHal.h
index 277055c..58991c1 100644
--- a/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerHal.h
+++ b/graphics/composer/2.4/utils/hal/include/composer-hal/2.4/ComposerHal.h
@@ -79,6 +79,10 @@
             uint32_t* outDisplayRequestMask, std::vector<Layer>* outRequestedLayers,
             std::vector<uint32_t>* outRequestMasks,
             IComposerClient::ClientTargetProperty* outClientTargetProperty) = 0;
+    virtual Error setLayerGenericMetadata(Display display, Layer layer, const std::string& key,
+                                          bool mandatory, const std::vector<uint8_t>& value) = 0;
+    virtual Error getLayerGenericMetadataKeys(
+            std::vector<IComposerClient::LayerGenericMetadataKey>* outKeys) = 0;
 };
 
 }  // namespace hal
diff --git a/graphics/composer/2.4/utils/passthrough/include/composer-passthrough/2.4/HwcHal.h b/graphics/composer/2.4/utils/passthrough/include/composer-passthrough/2.4/HwcHal.h
index 616852a..d28e006 100644
--- a/graphics/composer/2.4/utils/passthrough/include/composer-passthrough/2.4/HwcHal.h
+++ b/graphics/composer/2.4/utils/passthrough/include/composer-passthrough/2.4/HwcHal.h
@@ -245,6 +245,61 @@
         return err;
     }
 
+    Error setLayerGenericMetadata(Display display, Layer layer, const std::string& key,
+                                  bool mandatory, const std::vector<uint8_t>& value) override {
+        if (!mDispatch.setLayerGenericMetadata) {
+            return Error::UNSUPPORTED;
+        }
+
+        if (key.size() > std::numeric_limits<uint32_t>::max()) {
+            return Error::BAD_PARAMETER;
+        }
+
+        if (value.size() > std::numeric_limits<uint32_t>::max()) {
+            return Error::BAD_PARAMETER;
+        }
+
+        int32_t error = mDispatch.setLayerGenericMetadata(
+                mDevice, display, layer, static_cast<uint32_t>(key.size()), key.c_str(), mandatory,
+                static_cast<uint32_t>(value.size()), value.data());
+        return static_cast<Error>(error);
+    }
+
+    Error getLayerGenericMetadataKeys(
+            std::vector<IComposerClient::LayerGenericMetadataKey>* outKeys) override {
+        if (!mDispatch.getLayerGenericMetadataKey) {
+            return Error::UNSUPPORTED;
+        }
+
+        std::vector<IComposerClient::LayerGenericMetadataKey> keys;
+
+        uint32_t index = 0;
+        uint32_t keyLength = 0;
+        while (true) {
+            mDispatch.getLayerGenericMetadataKey(mDevice, index, &keyLength, nullptr, nullptr);
+            if (keyLength == 0) {
+                break;
+            }
+
+            IComposerClient::LayerGenericMetadataKey key;
+            std::string keyName;
+            keyName.resize(keyLength);
+            mDispatch.getLayerGenericMetadataKey(mDevice, index, &keyLength, keyName.data(),
+                                                 &key.mandatory);
+            key.name = keyName;
+            keys.emplace_back(std::move(key));
+
+            // Only attempt to load the first 100 keys to avoid an infinite loop
+            // if something goes wrong
+            if (++index > 100) {
+                break;
+            }
+        }
+
+        *outKeys = std::move(keys);
+        return Error::NONE;
+    }
+
   protected:
     bool initDispatch() override {
         if (!BaseType2_3::initDispatch()) {
@@ -267,6 +322,11 @@
         this->initOptionalDispatch(HWC2_FUNCTION_SET_CONTENT_TYPE, &mDispatch.setContentType);
         this->initOptionalDispatch(HWC2_FUNCTION_GET_CLIENT_TARGET_PROPERTY,
                                    &mDispatch.getClientTargetProperty);
+        this->initOptionalDispatch(HWC2_FUNCTION_SET_LAYER_GENERIC_METADATA,
+                                   &mDispatch.setLayerGenericMetadata);
+        this->initOptionalDispatch(HWC2_FUNCTION_GET_LAYER_GENERIC_METADATA_KEY,
+                                   &mDispatch.getLayerGenericMetadataKey);
+
         return true;
     }
 
@@ -319,6 +379,8 @@
         HWC2_PFN_GET_SUPPORTED_CONTENT_TYPES getSupportedContentTypes;
         HWC2_PFN_SET_CONTENT_TYPE setContentType;
         HWC2_PFN_GET_CLIENT_TARGET_PROPERTY getClientTargetProperty;
+        HWC2_PFN_SET_LAYER_GENERIC_METADATA setLayerGenericMetadata;
+        HWC2_PFN_GET_LAYER_GENERIC_METADATA_KEY getLayerGenericMetadataKey;
     } mDispatch = {};
 
     hal::ComposerHal::EventCallback_2_4* mEventCallback_2_4 = nullptr;
diff --git a/graphics/composer/2.4/utils/vts/ComposerVts.cpp b/graphics/composer/2.4/utils/vts/ComposerVts.cpp
index 8a9c006..8cdc452 100644
--- a/graphics/composer/2.4/utils/vts/ComposerVts.cpp
+++ b/graphics/composer/2.4/utils/vts/ComposerVts.cpp
@@ -129,6 +129,16 @@
     return mClient->setContentType(display, contentType);
 }
 
+Error ComposerClient::getLayerGenericMetadataKeys(
+        std::vector<IComposerClient::LayerGenericMetadataKey>* outKeys) {
+    Error error = Error::NONE;
+    mClient->getLayerGenericMetadataKeys([&](const auto tmpError, const auto& tmpKeys) {
+        error = tmpError;
+        *outKeys = tmpKeys;
+    });
+    return error;
+}
+
 }  // namespace vts
 }  // namespace V2_4
 }  // namespace composer
diff --git a/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h b/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h
index df75a48..3dd8e50 100644
--- a/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h
+++ b/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h
@@ -93,6 +93,9 @@
 
     Error setContentType(Display display, IComposerClient::ContentType contentType);
 
+    Error getLayerGenericMetadataKeys(
+            std::vector<IComposerClient::LayerGenericMetadataKey>* outKeys);
+
   private:
     const sp<IComposerClient> mClient;
 };