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diff --git a/msm8909/sdm/include/private/extension_interface.h b/msm8909/sdm/include/private/extension_interface.h
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+/*
+* Copyright (c) 2015 - 2017, The Linux Foundation. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without modification, are permitted
+* provided that the following conditions are met:
+*    * Redistributions of source code must retain the above copyright notice, this list of
+*      conditions and the following disclaimer.
+*    * Redistributions in binary form must reproduce the above copyright notice, this list of
+*      conditions and the following disclaimer in the documentation and/or other materials provided
+*      with the distribution.
+*    * Neither the name of The Linux Foundation nor the names of its contributors may be used to
+*      endorse or promote products derived from this software without specific prior written
+*      permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef __EXTENSION_INTERFACE_H__
+#define __EXTENSION_INTERFACE_H__
+
+#include <core/sdm_types.h>
+#include <core/display_interface.h>
+
+#include "partial_update_interface.h"
+#include "strategy_interface.h"
+#include "resource_interface.h"
+#include "dpps_control_interface.h"
+
+namespace sdm {
+
+#define EXTENSION_LIBRARY_NAME "libsdmextension.so"
+#define CREATE_EXTENSION_INTERFACE_NAME "CreateExtensionInterface"
+#define DESTROY_EXTENSION_INTERFACE_NAME "DestroyExtensionInterface"
+
+#define EXTENSION_REVISION_MAJOR (1)
+#define EXTENSION_REVISION_MINOR (0)
+
+#define EXTENSION_VERSION_TAG ((uint16_t) ((EXTENSION_REVISION_MAJOR << 8) \
+                                          | EXTENSION_REVISION_MINOR))
+
+class ExtensionInterface;
+
+typedef DisplayError (*CreateExtensionInterface)(uint16_t version, ExtensionInterface **interface);
+typedef DisplayError (*DestroyExtensionInterface)(ExtensionInterface *interface);
+
+class ExtensionInterface {
+ public:
+  virtual DisplayError CreatePartialUpdate(DisplayType type, const HWResourceInfo &hw_resource_info,
+                                           const HWPanelInfo &hw_panel_info,
+                                           const HWMixerAttributes &mixer_attributes,
+                                           const HWDisplayAttributes &display_attributes,
+                                           const DisplayConfigVariableInfo &fb_config,
+                                           PartialUpdateInterface **interface) = 0;
+  virtual DisplayError DestroyPartialUpdate(PartialUpdateInterface *interface) = 0;
+
+  virtual DisplayError CreateStrategyExtn(DisplayType type, BufferAllocator *buffer_allocator,
+                                          const HWResourceInfo &hw_resource_info,
+                                          const HWPanelInfo &hw_panel_info,
+                                          const HWMixerAttributes &mixer_attributes,
+                                          const DisplayConfigVariableInfo &fb_config,
+                                          StrategyInterface **interface) = 0;
+  virtual DisplayError DestroyStrategyExtn(StrategyInterface *interface) = 0;
+
+  virtual DisplayError CreateResourceExtn(const HWResourceInfo &hw_resource_info,
+                                          BufferAllocator *buffer_allocator,
+                                          BufferSyncHandler *buffer_sync_handler,
+                                          ResourceInterface **interface) = 0;
+  virtual DisplayError DestroyResourceExtn(ResourceInterface *interface) = 0;
+  virtual DisplayError CreateDppsControlExtn(DppsControlInterface **dpps_control_interface,
+                                             SocketHandler *socket_handler) = 0;
+  virtual DisplayError DestroyDppsControlExtn(DppsControlInterface *interface) = 0;
+
+ protected:
+  virtual ~ExtensionInterface() { }
+};
+
+}  // namespace sdm
+
+#endif  // __EXTENSION_INTERFACE_H__
+