commonsys-intf: display: add Smomo config interface

Add Smomo config interface definition.

Change-Id: I0fcf9af230a76c535d07e6968a93867f67840f7b
diff --git a/config/display-product-system.mk b/config/display-product-system.mk
index ee8c9a2..7ee4fcd 100644
--- a/config/display-product-system.mk
+++ b/config/display-product-system.mk
@@ -8,6 +8,6 @@
                     vendor.display.config@1.3 \
                     vendor.display.config@1.4 \
                     vendor.display.config@1.5 \
-                    libsmomo.qti\
-                    liblayerext.qti
-
+                    libsmomo.qti \
+                    liblayerext.qti \
+                    libsmomoconfig.qti
diff --git a/include/smomo_config.h b/include/smomo_config.h
new file mode 100644
index 0000000..e203102
--- /dev/null
+++ b/include/smomo_config.h
@@ -0,0 +1,42 @@
+/*
+* Copyright (c) 2019, 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.
+*/
+
+/*! @file smomo_config.h
+  @brief Interface file for the client of Smomo service, which provides tuning parameters of Smomo
+
+  @details Smomo clients use these interfaces to enable or disable Smomo, tune parameters to
+  optimize the display performance.
+*/
+
+#ifndef __SMOMO_CONFIG_H__
+#define __SMOMO_CONFIG_H__
+
+namespace smomoconfig {
+
+int EnableSmomo(bool enable);
+
+}  // namespace smomoconfig
+
+#endif  // __SMOMO_CONFIG_H__
+