surfaceflinger: discard stale commands
When we skip validate, we may have stale commands on the command
buffer. They should be discarded.
Bug: 62906801
Test: manual
Change-Id: Ie7921ba75ab2252b834cda6924e1fcfdf236f759
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 4d9155c..7463e3b 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -259,6 +259,12 @@
uint32_t* outNumRequests,
android::sp<android::Fence>* outPresentFence, uint32_t* state);
+ // Most methods in this class write a command to a command buffer. The
+ // command buffer is implicitly submitted in validate, present, and
+ // presentOrValidate. This method provides a way to discard the commands,
+ // which can be used to discard stale commands.
+ void discardCommands();
+
// Other Display methods
Device& getDevice() const { return mDevice; }