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diff --git a/msm8909/sdm/libs/hwc/cpuhint.h b/msm8909/sdm/libs/hwc/cpuhint.h
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+/* Copyright (c) 2015, The Linux Foundataion. 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 __CPUHINT_H__
+#define __CPUHINT_H__
+
+#include <core/sdm_types.h>
+#include <utils/sys.h>
+
+namespace sdm {
+
+class HWCDebugHandler;
+
+class CPUHint {
+ public:
+  DisplayError Init(HWCDebugHandler *debug_handler);
+  void Set();
+  void Reset();
+
+ private:
+  enum { HINT =  0x4501 /* 45-display layer hint, 01-Enable */ };
+  bool enabled_ = false;
+  // frames to wait before setting this hint
+  int pre_enable_window_ = 0;
+  int frame_countdown_ = 0;
+  int lock_handle_ = 0;
+  bool lock_acquired_ = false;
+  DynLib vendor_ext_lib_;
+  int (*fn_lock_acquire_)(int handle, int duration, int *hints, int num_args) = NULL;
+  int (*fn_lock_release_)(int value) = NULL;
+};
+
+}  // namespace sdm
+
+#endif  // __CPUHINT_H__