workaround to set the WM refresh rate to 48 Hz for tuna devices only

this is TEMPORARY until we can do this properly.

Bug: 5572464
Change-Id: I6537706d636a83a4a50e2900d6b829dd89b6f245

Author: pixelflinger

services/java/com/android/server/wm/WindowManagerService.java

@@ -226,11 +226,6 @@ public class WindowManagerService extends IWindowManager.Stub
      */
     static final int DEFAULT_FADE_IN_OUT_DURATION = 400;
 
-    /**
-     * Frame rate. TODO: Replace with Display.getRefreshRate() when that is reliable.
-     */
-    static final int FRAME_RATE = 48;
-
     /**
      * If true, the window manager will do its own custom freezing and general
      * management of the screen during rotation.
@@ -8687,7 +8682,8 @@ private final void performLayoutAndPlaceSurfacesLockedInner(
         if (needRelayout) {
             requestAnimationLocked(0);
         } else if (animating) {
-            requestAnimationLocked(currentTime+(1000/FRAME_RATE)-SystemClock.uptimeMillis());
+            final int refreshTimeUs = (int)(1000 / mDisplay.getRefreshRate());
+            requestAnimationLocked(currentTime + refreshTimeUs - SystemClock.uptimeMillis());
         }
 
         // Finally update all input windows now that the window changes have stabilized.

services/surfaceflinger/Android.mk

@@ -30,6 +30,10 @@ ifeq ($(TARGET_BOARD_PLATFORM), s5pc110)
 	LOCAL_CFLAGS += -DHAS_CONTEXT_PRIORITY -DNEVER_DEFAULT_TO_ASYNC_MODE
 endif
 
+ifneq (,$(findstring $(TARGET_DEVICE),tuna toro maguro))
+	LOCAL_CFLAGS += -DREFRESH_RATE=48
+endif
+
 
 LOCAL_SHARED_LIBRARIES := \
 	libcutils \

services/surfaceflinger/DisplayHardware/DisplayHardware.cpp

@@ -141,6 +141,17 @@ void DisplayHardware::init(uint32_t dpy)
     mDpiY = mNativeWindow->ydpi;
     mRefreshRate = fbDev->fps;
 
+
+/* FIXME: this is a temporary HACK until we are able to report the refresh rate
+ * properly from the HAL. The WindowManagerService now relies on this value.
+ */
+#ifndef REFRESH_RATE
+    mRefreshRate = fbDev->fps;
+#else
+    mRefreshRate = REFRESH_RATE;
+#warning "refresh rate set via makefile to REFRESH_RATE"
+#endif
+
     EGLint w, h, dummy;
     EGLint numConfigs=0;
     EGLSurface surface;