commit 6d46c1e2bb6ac6a90c7cb4993e920443a6fcecfe
author David Sodman <dsodman@google.com> Fri Jul 13 12:59:48 2018 -0700
committer David Sodman <dsodman@google.com> Tue Aug 07 12:36:42 2018 -0700
tree 5fa34eccc6b882c5e86f3ab7542bad2e6103761c
parent 0c2a6f8cc9d5be9e93f247cdbe55729972b8a270

SF: enable high refresh rate virtual mode

Add support for SF backdoor to set a multiplier
and divisor on the period for VSYNC-sf and
VSYNC-app from the primary DispSync object.

Bug: 111549030
Test: enable high refresh rate in devOptions and
view with systrace

Change-Id: I4226d5791d8d7ddeae1ad96577713c9c2141ed58

services/surfaceflinger/DisplayHardware/HWC2.h

diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 900b3d7..e0d6ecc 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -23,6 +23,7 @@
 #undef HWC2_INCLUDE_STRINGIFICATION
 #undef HWC2_USE_CPP11
 
+#include <cutils/properties.h>
 #include <gui/HdrMetadata.h>
 #include <math/mat4.h>
 #include <ui/GraphicTypes.h>
@@ -160,6 +161,8 @@
             }
             Builder& setVsyncPeriod(int32_t vsyncPeriod) {
                 mConfig->mVsyncPeriod = vsyncPeriod;
+                mConfig->mPeriodMultiplier = 1;
+                mConfig->mPeriodDivisor = 1;
                 return *this;
             }
             Builder& setDpiX(int32_t dpiX) {
@@ -189,7 +192,12 @@
 
         int32_t getWidth() const { return mWidth; }
         int32_t getHeight() const { return mHeight; }
-        nsecs_t getVsyncPeriod() const { return mVsyncPeriod; }
+        nsecs_t getVsyncPeriod() const {
+            return mVsyncPeriod * mPeriodMultiplier / mPeriodDivisor; }
+        void scalePanelFrequency(int32_t multiplier, int32_t divisor) const {
+            mPeriodMultiplier = multiplier;
+            mPeriodDivisor = divisor;
+        }
         float getDpiX() const { return mDpiX; }
         float getDpiY() const { return mDpiY; }
 
@@ -202,6 +210,8 @@
         int32_t mWidth;
         int32_t mHeight;
         nsecs_t mVsyncPeriod;
+        mutable int32_t mPeriodMultiplier;
+        mutable int32_t mPeriodDivisor;
         float mDpiX;
         float mDpiY;
     };