SF: Add a flag for the connected-display feature

Bug: 299486625
Test: adb shell dumpsys SurfaceFlinger  -- check for
"ConnectedDisplayFlagValue"

Change-Id: I4526091ca938ef378877edf63b499a3c8c8a39d9

3 files changed, 15 insertions, 1 deletions

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index a7f2845a61..517dc96195 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -494,7 +494,9 @@ SurfaceFlinger::SurfaceFlinger(Factory& factory) : SurfaceFlinger(factory, SkipI
     mLegacyFrontEndEnabled = !mLayerLifecycleManagerEnabled ||
             base::GetBoolProperty("persist.debug.sf.enable_legacy_frontend"s, false);
 
+    // Trunk-Stable flags
     mMiscFlagValue = flags::misc1();
+    mConnectedDisplayFlagValue = flags::connected_display();
 }
 
 LatchUnsignaledConfig SurfaceFlinger::getLatchUnsignaledConfig() {
@@ -6342,6 +6344,8 @@ void SurfaceFlinger::dumpAllLocked(const DumpArgs& args, const std::string& comp
     colorizer.reset(result);
 
     StringAppendF(&result, "MiscFlagValue: %s\n", mMiscFlagValue ? "true" : "false");
+    StringAppendF(&result, "ConnectedDisplayFlagValue: %s\n",
+                  mConnectedDisplayFlagValue ? "true" : "false");
 
     getRenderEngine().dump(result);
 
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index f7525840f8..59b1172edc 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -1451,7 +1451,9 @@ private:
     void sfdo_scheduleComposite();
     void sfdo_scheduleCommit();
 
+    // Trunk-Stable flags
     bool mMiscFlagValue;
+    bool mConnectedDisplayFlagValue;
 };
 
 class SurfaceComposerAIDL : public gui::BnSurfaceComposer {
diff --git a/services/surfaceflinger/surfaceflinger_flags.aconfig b/services/surfaceflinger/surfaceflinger_flags.aconfig
index 0a368884ae..f47ed453ee 100644
--- a/services/surfaceflinger/surfaceflinger_flags.aconfig
+++ b/services/surfaceflinger/surfaceflinger_flags.aconfig
@@ -6,4 +6,12 @@ flag {
   description: "This flag controls minor miscellaneous SurfaceFlinger changes"
   bug: "297389311"
   is_fixed_read_only: true
-}
\ No newline at end of file
+}
+
+flag {
+  name: "connected_display"
+  namespace: "core_graphics"
+  description: "Controls SurfaceFlinger support for Connected Displays"
+  bug: "278199093"
+  is_fixed_read_only: true
+}