Merge "Remove old workaround for display issues" into pi-dev

am: a43de8b61a

Change-Id: I8852443ed74f94a60975b74c192a1ac65ad20dd1

libs/hwui/renderthread/CanvasContext.cpp

@@ -355,7 +355,14 @@ void CanvasContext::prepareTree(TreeInfo& info, int64_t* uiFrameInfo, int64_t sy
             // Already drew for this vsync pulse, UI draw request missed
             // the deadline for RT animations
             info.out.canDrawThisFrame = false;
-        } else if (vsyncDelta >= mRenderThread.timeLord().frameIntervalNanos() * 3 ||
+        }
+        /* This logic exists to try and recover from a display latch miss, which essentially
+         * results in the bufferqueue being double-buffered instead of triple-buffered.
+         * SurfaceFlinger itself now tries to handle & recover from this situation, so this
+         * logic should no longer be necessary. As it's occasionally triggering when
+         * undesired disable it.
+         * TODO: Remove this entirely if the results are solid.
+        else if (vsyncDelta >= mRenderThread.timeLord().frameIntervalNanos() * 3 ||
                    (latestVsync - mLastDropVsync) < 500_ms) {
             // It's been several frame intervals, assume the buffer queue is fine
             // or the last drop was too recent
@@ -367,6 +374,7 @@ void CanvasContext::prepareTree(TreeInfo& info, int64_t* uiFrameInfo, int64_t sy
                 mLastDropVsync = mRenderThread.timeLord().latestVsync();
             }
         }
+        */
     } else {
         info.out.canDrawThisFrame = true;
     }