Latch Unsignaled when only a single layer is being updated.

Three conditions are introduced.
DISABLED (Default for now): This is when latch unsignaled is completely disabled.
AUTO: This is when we will latch for the single layer update. Further refinements will be done in b/200284381
ALWAYS: This will latch unsignaled no matter what the change is.

BUG: 198189193
Test: Did the manual test and
atest libsurfaceflinger_unittest
atest MockFence_test
atest libgui_test

Change-Id: I0c0b475ba4a093275fac23a986fc610ea462f73e

1 files changed, 1 insertions, 1 deletions

diff --git a/services/surfaceflinger/BufferQueueLayer.cpp b/services/surfaceflinger/BufferQueueLayer.cpp
index 4e5d2d03b0..8aecec131f 100644
--- a/services/surfaceflinger/BufferQueueLayer.cpp
+++ b/services/surfaceflinger/BufferQueueLayer.cpp
@@ -118,7 +118,7 @@ bool BufferQueueLayer::isBufferDue(nsecs_t expectedPresentTime) const {
 bool BufferQueueLayer::fenceHasSignaled() const {
     Mutex::Autolock lock(mQueueItemLock);
 
-    if (SurfaceFlinger::enableLatchUnsignaled) {
+    if (SurfaceFlinger::enableLatchUnsignaledConfig != LatchUnsignaledConfig::Disabled) {
         return true;
     }