OverlayProperty API implementation

- load overlay properties upon SF callbacks.

Bug: 242588489
Test: atest libsurfaceflinger_unittest, hardcode some dataspaces and
pixelformats values in HalImpl::getOverlaySupport to make sure the path
from HWC to HWUI is functionally workable on the device

Change-Id: I7e5ab7e242ca86daa991141910690f633c5de6ac
diff --git a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
index 0e41962..ad1a939 100644
--- a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
@@ -504,8 +504,12 @@
     return Error::NONE;
 }
 
-Error AidlComposer::getOverlaySupport(AidlOverlayProperties* /*outProperties*/) {
-    // TODO(b/242588489): implement details
+Error AidlComposer::getOverlaySupport(AidlOverlayProperties* outProperties) {
+    const auto status = mAidlComposerClient->getOverlaySupport(outProperties);
+    if (!status.isOk()) {
+        ALOGE("getOverlaySupport failed %s", status.getDescription().c_str());
+        return static_cast<Error>(status.getServiceSpecificError());
+    }
     return Error::NONE;
 }
 
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index a9337d8..e264570 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -334,9 +334,9 @@
     return Error::NONE;
 }
 
-Error Display::getOverlaySupport(OverlayProperties* /*outProperties*/) const {
-    // TODO(b/242588489): implement details
-    return Error::NONE;
+Error Display::getOverlaySupport(OverlayProperties* outProperties) const {
+    auto intError = mComposer.getOverlaySupport(outProperties);
+    return static_cast<Error>(intError);
 }
 
 Error Display::getDisplayedContentSamplingAttributes(hal::PixelFormat* outFormat,
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index 168e2dd..ca68054 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -96,6 +96,7 @@
 void HWComposer::setCallback(HWC2::ComposerCallback& callback) {
     loadCapabilities();
     loadLayerMetadataSupport();
+    loadOverlayProperties();
 
     if (mRegisteredCallback) {
         ALOGW("Callback already registered. Ignored extra registration attempt.");
@@ -652,9 +653,9 @@
     return NO_ERROR;
 }
 
-status_t HWComposer::getOverlaySupport(
-        aidl::android::hardware::graphics::composer3::OverlayProperties* /*outProperties*/) {
-    return NO_ERROR;
+const aidl::android::hardware::graphics::composer3::OverlayProperties&
+HWComposer::getOverlaySupport() const {
+    return mOverlayProperties;
 }
 
 int32_t HWComposer::getSupportedPerFrameMetadata(HalDisplayId displayId) const {
@@ -971,6 +972,10 @@
     }
 }
 
+void HWComposer::loadOverlayProperties() {
+    mComposer->getOverlaySupport(&mOverlayProperties);
+}
+
 status_t HWComposer::setIdleTimerEnabled(PhysicalDisplayId displayId,
                                          std::chrono::milliseconds timeout) {
     ATRACE_CALL();
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index 8235b88..78d4a68 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -179,8 +179,8 @@
     // Fetches the HDR capabilities of the given display
     virtual status_t getHdrCapabilities(HalDisplayId, HdrCapabilities* outCapabilities) = 0;
 
-    virtual status_t getOverlaySupport(
-            aidl::android::hardware::graphics::composer3::OverlayProperties* outProperties) = 0;
+    virtual const aidl::android::hardware::graphics::composer3::OverlayProperties&
+    getOverlaySupport() const = 0;
 
     virtual int32_t getSupportedPerFrameMetadata(HalDisplayId) const = 0;
 
@@ -366,8 +366,8 @@
     // Fetches the HDR capabilities of the given display
     status_t getHdrCapabilities(HalDisplayId, HdrCapabilities* outCapabilities) override;
 
-    status_t getOverlaySupport(aidl::android::hardware::graphics::composer3::OverlayProperties*
-                                       outProperties) override;
+    const aidl::android::hardware::graphics::composer3::OverlayProperties& getOverlaySupport()
+            const override;
 
     int32_t getSupportedPerFrameMetadata(HalDisplayId) const override;
 
@@ -489,11 +489,13 @@
 
     void loadCapabilities();
     void loadLayerMetadataSupport();
+    void loadOverlayProperties();
 
     std::unordered_map<HalDisplayId, DisplayData> mDisplayData;
 
     std::unique_ptr<android::Hwc2::Composer> mComposer;
     std::unordered_set<aidl::android::hardware::graphics::composer3::Capability> mCapabilities;
+    aidl::android::hardware::graphics::composer3::OverlayProperties mOverlayProperties;
     std::unordered_map<std::string, bool> mSupportedLayerGenericMetadata;
     bool mRegisteredCallback = false;