commit 5690bde1e9192bc161ff6ae9fc80d8c4eaef6fd9
author Dominik Laskowski <domlaskowski@google.com> Thu Apr 23 19:04:22 2020 -0700
committer Dominik Laskowski <domlaskowski@google.com> Mon Apr 27 17:41:27 2020 -0700
tree 840c4ce1c5d00b75aa9a8a478ba580a7740f193b
parent 8e89c2ad0f2981f196307285d7d45b42c17356e4

SF: Defer setDisplayBrightness to Binder thread

setDisplayBrightness blocks for a long time so cannot run on the main
thread. Keep display lookup on the main thread, but return a deferred
future to the Binder thread and run it there.

Bug: 154202427
Bug: 123715322
Test: systrace with backdoor to set brightness
Change-Id: I88e60c95db5fdcaa1bf5ebb9711e3bf5ab6539a1

services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h

diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h b/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h
index 27266b7..75a4fec 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h
@@ -74,7 +74,7 @@
     MOCK_METHOD4(setDisplayContentSamplingEnabled, status_t(DisplayId, bool, uint8_t, uint64_t));
     MOCK_METHOD4(getDisplayedContentSample,
                  status_t(DisplayId, uint64_t, uint64_t, DisplayedFrameStats*));
-    MOCK_METHOD2(setDisplayBrightness, status_t(DisplayId, float));
+    MOCK_METHOD2(setDisplayBrightness, std::future<status_t>(DisplayId, float));
     MOCK_METHOD2(getDisplayBrightnessSupport, status_t(DisplayId, bool*));
 
     MOCK_METHOD2(onHotplug,