commit 1768cb03cf1ea51ec18f2514f8afa086b6314ba5
author Huihong Luo <huisinro@google.com> Tue Oct 11 11:10:34 2022 -0700
committer Huihong Luo <huisinro@google.com> Mon Jan 30 12:43:40 2023 -0800
tree 05589b03c3d389989fb2884c4393842a366a3526
parent 67011ef83d09d93fa8237cbd33be3960f3152a68

Variable refresh rate for virtual display

Allow virtual display to request a refresh rate, so it can be different
from VSYNC frequencies. SurfaceFlinger drops frames for the
corresponding virtual display based on the refresh rate.

Bug: 241286579
Test: atest libgui_test libsurfaceflinger_unittest SurfaceFlinger_test
Change-Id: I4fba0e553618bb4c7333514b16206ae4277acf72

services/surfaceflinger/SurfaceFlinger.h

diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 207dfe2..170af48 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -483,7 +483,8 @@
             EXCLUDES(mStateLock);
 
     // Implements ISurfaceComposer
-    sp<IBinder> createDisplay(const String8& displayName, bool secure);
+    sp<IBinder> createDisplay(const String8& displayName, bool secure,
+                              float requestedRefreshRate = 0);
     void destroyDisplay(const sp<IBinder>& displayToken);
     std::vector<PhysicalDisplayId> getPhysicalDisplayIds() const EXCLUDES(mStateLock) {
         Mutex::Autolock lock(mStateLock);
@@ -1403,7 +1404,7 @@
             sp<gui::IDisplayEventConnection>* outConnection) override;
     binder::Status createConnection(sp<gui::ISurfaceComposerClient>* outClient) override;
     binder::Status createDisplay(const std::string& displayName, bool secure,
-                                 sp<IBinder>* outDisplay) override;
+                                 float requestedRefreshRate, sp<IBinder>* outDisplay) override;
     binder::Status destroyDisplay(const sp<IBinder>& display) override;
     binder::Status getPhysicalDisplayIds(std::vector<int64_t>* outDisplayIds) override;
     binder::Status getPhysicalDisplayToken(int64_t displayId, sp<IBinder>* outDisplay) override;