SurfaceFlinger: add explicit eEarlyWakeup start and end
The current handling of eEarlyWakeup is using 2 frames of timeout
in SurfaceFlinger to know when we are no longer in early offset config.
There are few cases where a transaction is dropped or delayed (usually
caused by the offset change itself) which results in switching back
and forth from early offset to non-early offset. This change adds two
new flags, eExplicitEarlyWakeupStart and eExplicitEarlyWakeupEnd that
will be used by WindowManager to indicate when to enter early offset
and when to exit. With these explicit flags, the timings on transaction
no longer matters and we consistently stay at early offset config for the desired
duration.
Bug: 158127834
Test: Quick switch between apps and verify that offset doesn't change
Test: adb shell /data/nativetest64/libsurfaceflinger_unittest/libsurfaceflinger_unittest
Change-Id: Ie10af30a2d8c0f4f21ac7ffed469a74e1bf8dbc1
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 9e24f909..730ea8f 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -55,13 +55,24 @@
virtual void kernelTimerChanged(bool expired) = 0;
};
-class Scheduler {
+class IPhaseOffsetControl {
+public:
+ virtual ~IPhaseOffsetControl() = default;
+ virtual void setPhaseOffset(scheduler::ConnectionHandle, nsecs_t phaseOffset) = 0;
+};
+
+class Scheduler : public IPhaseOffsetControl {
public:
using RefreshRate = scheduler::RefreshRateConfigs::RefreshRate;
using ConfigEvent = scheduler::RefreshRateConfigEvent;
// Indicates whether to start the transaction early, or at vsync time.
- enum class TransactionStart { EARLY, NORMAL };
+ enum class TransactionStart {
+ Early, // DEPRECATED. Start the transaction early. Times out on its own
+ EarlyStart, // Start the transaction early and keep this config until EarlyEnd
+ EarlyEnd, // End the early config started at EarlyStart
+ Normal // Start the transaction at the normal time
+ };
Scheduler(impl::EventControlThread::SetVSyncEnabledFunction,
const scheduler::RefreshRateConfigs&, ISchedulerCallback& schedulerCallback,
@@ -90,7 +101,7 @@
void onScreenReleased(ConnectionHandle);
// Modifies phase offset in the event thread.
- void setPhaseOffset(ConnectionHandle, nsecs_t phaseOffset);
+ void setPhaseOffset(ConnectionHandle, nsecs_t phaseOffset) override;
void getDisplayStatInfo(DisplayStatInfo* stats);