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diff --git a/msm8909/sdm/libs/hwc/hwc_buffer_allocator.h b/msm8909/sdm/libs/hwc/hwc_buffer_allocator.h
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+/*
+* Copyright (c) 2015-2016, 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 __HWC_BUFFER_ALLOCATOR_H__
+#define __HWC_BUFFER_ALLOCATOR_H__
+
+#include <sys/mman.h>
+#include <fcntl.h>
+
+namespace gralloc {
+
+class IAllocController;
+
+}  // namespace gralloc
+
+namespace sdm {
+
+class HWCBufferAllocator : public BufferAllocator {
+ public:
+  HWCBufferAllocator();
+
+  DisplayError AllocateBuffer(BufferInfo *buffer_info);
+  DisplayError FreeBuffer(BufferInfo *buffer_info);
+  uint32_t GetBufferSize(BufferInfo *buffer_info);
+  DisplayError GetAllocatedBufferInfo(const BufferConfig &buffer_config,
+                                      AllocatedBufferInfo *allocated_buffer_info);
+  DisplayError GetBufferLayout(const AllocatedBufferInfo &buf_info,
+                               uint32_t stride[4], uint32_t offset[4],
+                               uint32_t *num_planes);
+  int SetBufferInfo(LayerBufferFormat format, int *target, int *flags);
+
+ private:
+  struct MetaBufferInfo {
+    int alloc_type;              //!< Specifies allocation type set by the buffer allocator.
+    void *base_addr;             //!< Specifies the base address of the allocated output buffer.
+  };
+
+  gralloc::IAllocController *alloc_controller_;
+};
+
+}  // namespace sdm
+#endif  // __HWC_BUFFER_ALLOCATOR_H__
+