Merge "surfaceflinger: do not check HWC2::Capability::SkipValidate" am: c770d27ff0
am: 45f9c3871b

Change-Id: I614a6b588517ab3eea2d83041c169c88012a1b88
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index b096a3a..a16c040 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -444,10 +444,16 @@
 
     HWC2::Error error = HWC2::Error::None;
 
-    // First try to skip validate altogether if the HWC supports it.
+    // First try to skip validate altogether when there is no client
+    // composition.  When there is client composition, since we haven't
+    // rendered to the client target yet, we should not attempt to skip
+    // validate.
+    //
+    // displayData.hasClientComposition hasn't been updated for this frame.
+    // The check below is incorrect.  We actually rely on HWC here to fall
+    // back to validate when there is any client layer.
     displayData.validateWasSkipped = false;
-    if (hasCapability(HWC2::Capability::SkipValidate) &&
-            !displayData.hasClientComposition) {
+    if (!displayData.hasClientComposition) {
         sp<android::Fence> outPresentFence;
         uint32_t state = UINT32_MAX;
         error = hwcDisplay->presentOrValidate(&numTypes, &numRequests, &outPresentFence , &state);
diff --git a/services/surfaceflinger/tests/fakehwc/FakeComposerClient.cpp b/services/surfaceflinger/tests/fakehwc/FakeComposerClient.cpp
index 561db8d..07b8cc0 100644
--- a/services/surfaceflinger/tests/fakehwc/FakeComposerClient.cpp
+++ b/services/surfaceflinger/tests/fakehwc/FakeComposerClient.cpp
@@ -157,6 +157,10 @@
 
 FakeComposerClient::~FakeComposerClient() {}
 
+bool FakeComposerClient::hasCapability(hwc2_capability_t /*capability*/) {
+    return false;
+}
+
 void FakeComposerClient::removeClient() {
     ALOGV("removeClient");
     // TODO: Ahooga! Only thing current lifetime management choices in
diff --git a/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h b/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h
index 294abb2..dd384c0 100644
--- a/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h
+++ b/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h
@@ -45,6 +45,8 @@
     FakeComposerClient();
     virtual ~FakeComposerClient();
 
+    bool hasCapability(hwc2_capability_t capability) override;
+
     void removeClient() override;
     void enableCallback(bool enable) override;
     uint32_t getMaxVirtualDisplayCount() override;
diff --git a/services/vr/hardware_composer/impl/vr_hwc.cpp b/services/vr/hardware_composer/impl/vr_hwc.cpp
index fd271d0..d5664d5 100644
--- a/services/vr/hardware_composer/impl/vr_hwc.cpp
+++ b/services/vr/hardware_composer/impl/vr_hwc.cpp
@@ -232,7 +232,7 @@
 
 VrHwc::~VrHwc() {}
 
-bool VrHwc::hasCapability(Capability /* capability */) const { return false; }
+bool VrHwc::hasCapability(hwc2_capability_t /* capability */) { return false; }
 
 void VrHwc::removeClient() {
   std::lock_guard<std::mutex> guard(mutex_);
diff --git a/services/vr/hardware_composer/impl/vr_hwc.h b/services/vr/hardware_composer/impl/vr_hwc.h
index fce9a06..eff721b 100644
--- a/services/vr/hardware_composer/impl/vr_hwc.h
+++ b/services/vr/hardware_composer/impl/vr_hwc.h
@@ -196,8 +196,6 @@
   VrHwc();
   ~VrHwc() override;
 
-  bool hasCapability(Capability capability) const;
-
   Error setLayerInfo(Display display, Layer layer, uint32_t type,
                      uint32_t appId);
   Error setClientTargetMetadata(
@@ -207,6 +205,8 @@
       const IVrComposerClient::BufferMetadata& metadata);
 
   // ComposerBase
+  bool hasCapability(hwc2_capability_t capability) override;
+
   void removeClient() override;
   void enableCallback(bool enable) override;