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diff --git a/msm8909/libdisplayconfig/DisplayConfig.h b/msm8909/libdisplayconfig/DisplayConfig.h
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+/*
+* Copyright (c) 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 __DISPLAY_CONFIG_H__
+#define __DISPLAY_CONFIG_H__
+
+#include <stdint.h>
+#include <vector>
+
+// This header is for clients to use to set/get global display configuration.
+
+namespace display {
+
+enum {
+    DISPLAY_PRIMARY = 0,
+    DISPLAY_EXTERNAL,
+    DISPLAY_VIRTUAL,
+};
+
+enum {
+    EXTERNAL_OFFLINE = 0,
+    EXTERNAL_ONLINE,
+    EXTERNAL_PAUSE,
+    EXTERNAL_RESUME,
+};
+
+enum {
+    DISABLE_METADATA_DYN_REFRESH_RATE = 0,
+    ENABLE_METADATA_DYN_REFRESH_RATE,
+    SET_BINDER_DYN_REFRESH_RATE,
+};
+
+enum {
+    DISPLAY_PORT_DEFAULT = 0,
+    DISPLAY_PORT_DSI,
+    DISPLAY_PORT_DTV,
+    DISPLAY_PORT_WRITEBACK,
+    DISPLAY_PORT_LVDS,
+    DISPLAY_PORT_EDP,
+    DISPLAY_PORT_DP,
+};
+
+struct DisplayAttributes {
+    uint32_t vsync_period = 0; //nanoseconds
+    uint32_t xres = 0;
+    uint32_t yres = 0;
+    float xdpi = 0.0f;
+    float ydpi = 0.0f;
+    int panel_type = DISPLAY_PORT_DEFAULT;
+    bool is_yuv = false;
+};
+
+struct DisplayHDRCapabilities {
+    std::vector<int32_t> supported_hdr_types;
+    float max_luminance = 0.0f;
+    float max_avg_luminance = 0.0f;
+    float min_luminance = 0.0f;
+};
+
+//=============================================================================
+// The functions below run in the client pocess and wherever necessary
+// do a binder call to HWC to get/set data.
+
+int isExternalConnected();
+int setSecondayDisplayStatus(int dpy, uint32_t status);
+int configureDynRefeshRate(uint32_t op, uint32_t refreshRate);
+int getConfigCount(int dpy);
+int getActiveConfig(int dpy);
+int setActiveConfig(int dpy, uint32_t config);
+DisplayAttributes getDisplayAttributes(uint32_t configIndex, int dpy);
+int setPanelBrightness(uint32_t level);
+uint32_t getPanelBrightness();
+int minHdcpEncryptionLevelChanged(int dpy, uint32_t min_enc_level);
+int refreshScreen();
+int controlPartialUpdate(int dpy, bool enable);
+int toggleScreenUpdate(uint32_t on);
+int setIdleTimeout(uint32_t value);
+int getHDRCapabilities(int dpy, DisplayHDRCapabilities *caps);
+int setCameraLaunchStatus(uint32_t on);
+bool displayBWTransactionPending();
+
+} // namespace display
+
+#endif  // __DISPLAY_CONFIG_H__