SF: fix wouldPresentEarly when allow_n_vsyncs_in_targeter=true
wouldPresentEarly should return true if the previous frame would
not cause a backpressure.
Bug: 308858993
Test: SF unit tests
Flag: com.android.graphics.surfaceflinger.flags.allow_n_vsyncs_in_targeter
Change-Id: I0035145e06f2782cc190e329b542c2f4bbd6f0f1
diff --git a/services/surfaceflinger/Scheduler/tests/FrameTargeterTest.cpp b/services/surfaceflinger/Scheduler/tests/FrameTargeterTest.cpp
index bc73cbb..6f4e1f1 100644
--- a/services/surfaceflinger/Scheduler/tests/FrameTargeterTest.cpp
+++ b/services/surfaceflinger/Scheduler/tests/FrameTargeterTest.cpp
@@ -344,6 +344,39 @@
target().expectedPresentTime() - kPeriod - kHwcMinWorkDuration);
}
+TEST_F(FrameTargeterTest, detectsEarlyPresentAfterLongPeriod) {
+ VsyncId vsyncId{333};
+ TimePoint frameBeginTime(3000ms);
+ constexpr Fps kRefreshRate = 60_Hz;
+ constexpr Period kPeriod = kRefreshRate.getPeriod();
+
+ // The target is not early while past present fences are pending.
+ for (int n = 3; n-- > 0;) {
+ {
+ const Frame frame(this, vsyncId++, frameBeginTime, 10ms, kRefreshRate, kRefreshRate);
+ }
+ EXPECT_FALSE(wouldPresentEarly(kPeriod, kPeriod));
+ EXPECT_FALSE(target().earliestPresentTime());
+ }
+
+ // The target is early if the past present fence was signaled.
+ {
+ Frame frame(this, vsyncId++, frameBeginTime, 10ms, kRefreshRate, kRefreshRate);
+ const auto fence = frame.end();
+ fence->signalForTest(frameBeginTime.ns());
+ }
+
+ frameBeginTime += 10 * kPeriod;
+
+ Frame finalFrame(this, vsyncId++, frameBeginTime, 10ms, kRefreshRate, kRefreshRate);
+
+ // `finalFrame` would present early, so it has an earliest present time.
+ EXPECT_TRUE(wouldPresentEarly(kPeriod, kPeriod));
+ ASSERT_NE(std::nullopt, target().earliestPresentTime());
+ EXPECT_EQ(*target().earliestPresentTime(),
+ target().expectedPresentTime() - kPeriod - kHwcMinWorkDuration);
+}
+
// Same as `detectsEarlyPresent`, above, but verifies that we do not set an earliest present time
// when there is expected present time support.
TEST_F(FrameTargeterWithExpectedPresentSupportTest, detectsEarlyPresent) {