Merge changes from topic "HWC3-V3" into main

* changes:
  [Composer VTS] Adds VTS for getDisplayConfigurations
  Upgrade Composer interface version
  [Composer-HAL-AIDL] Interface changes with getDisplayConfigurations
diff --git a/compatibility_matrices/compatibility_matrix.9.xml b/compatibility_matrices/compatibility_matrix.9.xml
index 14b9210..559e7c2 100644
--- a/compatibility_matrices/compatibility_matrix.9.xml
+++ b/compatibility_matrices/compatibility_matrix.9.xml
@@ -248,7 +248,7 @@
     </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.graphics.composer3</name>
-        <version>2</version>
+        <version>3</version>
         <interface>
             <name>IComposer</name>
             <instance>default</instance>
diff --git a/graphics/Android.bp b/graphics/Android.bp
index 2fbcb41..8a69f09 100644
--- a/graphics/Android.bp
+++ b/graphics/Android.bp
@@ -53,13 +53,13 @@
 cc_defaults {
     name: "android.hardware.graphics.composer3-ndk_static",
     static_libs: [
-        "android.hardware.graphics.composer3-V2-ndk",
+        "android.hardware.graphics.composer3-V3-ndk",
     ],
 }
 
 cc_defaults {
     name: "android.hardware.graphics.composer3-ndk_shared",
     shared_libs: [
-        "android.hardware.graphics.composer3-V2-ndk",
+        "android.hardware.graphics.composer3-V3-ndk",
     ],
 }
diff --git a/graphics/composer/aidl/Android.bp b/graphics/composer/aidl/Android.bp
index 40448ec..88abb73 100644
--- a/graphics/composer/aidl/Android.bp
+++ b/graphics/composer/aidl/Android.bp
@@ -31,7 +31,7 @@
         enabled: true,
         support_system_process: true,
     },
-    frozen: true,
+    frozen: false,
     vndk_use_version: "1",
     srcs: [
         "android/hardware/graphics/composer3/*.aidl",
diff --git a/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/DisplayConfiguration.aidl b/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/DisplayConfiguration.aidl
new file mode 100644
index 0000000..908842a
--- /dev/null
+++ b/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/DisplayConfiguration.aidl
@@ -0,0 +1,47 @@
+/**
+ * Copyright 2023, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.graphics.composer3;
+@VintfStability
+parcelable DisplayConfiguration {
+  int configId;
+  int width;
+  int height;
+  @nullable android.hardware.graphics.composer3.DisplayConfiguration.Dpi dpi;
+  int configGroup;
+  int vsyncPeriod;
+  parcelable Dpi {
+    float x;
+    float y;
+  }
+}
diff --git a/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerClient.aidl b/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerClient.aidl
index cb85a88..2f08b6f 100644
--- a/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerClient.aidl
+++ b/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerClient.aidl
@@ -44,6 +44,9 @@
   float[] getDataspaceSaturationMatrix(android.hardware.graphics.common.Dataspace dataspace);
   int getDisplayAttribute(long display, int config, android.hardware.graphics.composer3.DisplayAttribute attribute);
   android.hardware.graphics.composer3.DisplayCapability[] getDisplayCapabilities(long display);
+  /**
+   * @deprecated use getDisplayConfigurations instead. For legacy support getDisplayConfigs should return at least one valid config. All the configs returned from the getDisplayConfigs should also be returned from getDisplayConfigurations.
+   */
   int[] getDisplayConfigs(long display);
   android.hardware.graphics.composer3.DisplayConnectionType getDisplayConnectionType(long display);
   android.hardware.graphics.composer3.DisplayIdentification getDisplayIdentificationData(long display);
@@ -79,6 +82,7 @@
   android.hardware.graphics.common.HdrConversionCapability[] getHdrConversionCapabilities();
   android.hardware.graphics.common.Hdr setHdrConversionStrategy(in android.hardware.graphics.common.HdrConversionStrategy conversionStrategy);
   void setRefreshRateChangedCallbackDebugEnabled(long display, boolean enabled);
+  android.hardware.graphics.composer3.DisplayConfiguration[] getDisplayConfigurations(long display);
   const int EX_BAD_CONFIG = 1;
   const int EX_BAD_DISPLAY = 2;
   const int EX_BAD_LAYER = 3;
diff --git a/graphics/composer/aidl/android/hardware/graphics/composer3/DisplayConfiguration.aidl b/graphics/composer/aidl/android/hardware/graphics/composer3/DisplayConfiguration.aidl
new file mode 100644
index 0000000..b0095d2
--- /dev/null
+++ b/graphics/composer/aidl/android/hardware/graphics/composer3/DisplayConfiguration.aidl
@@ -0,0 +1,63 @@
+/**
+ * Copyright 2023, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.graphics.composer3;
+
+@VintfStability
+parcelable DisplayConfiguration {
+    /**
+     * The config id, to be used with IComposerClient.setActiveConfig.
+     */
+    int configId;
+
+    /**
+     * Dimensions in pixels
+     */
+    int width;
+    int height;
+
+    /**
+     * Dots per thousand inches.
+     * If the DPI for a configuration is unavailable or is
+     * considered unreliable, the device may set null instead.
+     */
+    parcelable Dpi {
+        float x;
+        float y;
+    }
+    @nullable Dpi dpi;
+
+    /**
+     * The configuration group ID this config is associated to.
+     * Switching between configurations within the same group may be
+     * done seamlessly in some conditions via
+     * setActiveConfigWithConstraints. Configurations which share the
+     * same config group are similar in all attributes except for the
+     * vsync period.
+     */
+    int configGroup;
+
+    /**
+     * Vsync period in nanoseconds. This period represents the internal
+     * frequency of the display. IComposerCallback.onVsync is expected
+     * to be called on each vsync event. For non-VRR configurations, a
+     * frame can be presented on each vsync event.
+     *
+     * A present fence, retrieved from CommandResultPayload.presentFence
+     * must be signaled on a vsync boundary.
+     */
+    int vsyncPeriod;
+}
diff --git a/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerClient.aidl b/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerClient.aidl
index 4e77f86..5d04a28 100644
--- a/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerClient.aidl
+++ b/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerClient.aidl
@@ -28,6 +28,7 @@
 import android.hardware.graphics.composer3.DisplayAttribute;
 import android.hardware.graphics.composer3.DisplayCapability;
 import android.hardware.graphics.composer3.DisplayCommand;
+import android.hardware.graphics.composer3.DisplayConfiguration;
 import android.hardware.graphics.composer3.DisplayConnectionType;
 import android.hardware.graphics.composer3.DisplayContentSample;
 import android.hardware.graphics.composer3.DisplayContentSamplingAttributes;
@@ -263,15 +264,12 @@
     DisplayCapability[] getDisplayCapabilities(long display);
 
     /**
-     * Returns handles for all of the valid display configurations on this
-     * display.
-     * This should never return INVALID_CONFIGURATION as a valid value.
+     * @deprecated use getDisplayConfigurations instead.
+     * For legacy support getDisplayConfigs should return at least one valid config.
+     * All the configs returned from the getDisplayConfigs should also be returned
+     * from getDisplayConfigurations.
      *
-     * @param display is the display to query.
-     *
-     * @return is an array of configuration handles.
-     *
-     * @exception EX_BAD_DISPLAY when an invalid display handle was passed in.
+     * @see getDisplayConfigurations
      */
     int[] getDisplayConfigs(long display);
 
@@ -864,4 +862,15 @@
      *        false when refresh rate callback is disabled.
      */
     void setRefreshRateChangedCallbackDebugEnabled(long display, boolean enabled);
+
+    /**
+     * Returns all of the valid display configurations.
+     * getDisplayConfigurations is the superset of getDisplayConfigs and
+     * getDisplayConfigs should return at least one config.
+     *
+     * @param display is the display for which the configurations are requested.
+     *
+     * @see getDisplayConfigs
+     */
+    DisplayConfiguration[] getDisplayConfigurations(long display);
 }
diff --git a/graphics/composer/aidl/vts/VtsComposerClient.cpp b/graphics/composer/aidl/vts/VtsComposerClient.cpp
index 25b0ca0..bf42d88 100644
--- a/graphics/composer/aidl/vts/VtsComposerClient.cpp
+++ b/graphics/composer/aidl/vts/VtsComposerClient.cpp
@@ -58,7 +58,7 @@
     return verifyComposerCallbackParams() && destroyAllLayers();
 }
 
-std::pair<ScopedAStatus, int32_t> VtsComposerClient::getInterfaceVersion() {
+std::pair<ScopedAStatus, int32_t> VtsComposerClient::getInterfaceVersion() const {
     int32_t version = 1;
     auto status = mComposerClient->getInterfaceVersion(&version);
     return {std::move(status), version};
@@ -295,7 +295,24 @@
 std::pair<ScopedAStatus, std::vector<int32_t>> VtsComposerClient::getDisplayConfigs(
         int64_t display) {
     std::vector<int32_t> outConfigs;
-    return {mComposerClient->getDisplayConfigs(display, &outConfigs), outConfigs};
+    if (!getDisplayConfigurationSupported()) {
+        return {mComposerClient->getDisplayConfigs(display, &outConfigs), outConfigs};
+    }
+
+    auto [status, configs] = getDisplayConfigurations(display);
+    if (!status.isOk()) {
+        return {std::move(status), outConfigs};
+    }
+    for (const auto& config : configs) {
+        outConfigs.emplace_back(config.configId);
+    }
+    return {std::move(status), outConfigs};
+}
+
+std::pair<ScopedAStatus, std::vector<DisplayConfiguration>>
+VtsComposerClient::getDisplayConfigurations(int64_t display) {
+    std::vector<DisplayConfiguration> outConfigs;
+    return {mComposerClient->getDisplayConfigurations(display, &outConfigs), outConfigs};
 }
 
 std::pair<ScopedAStatus, int32_t> VtsComposerClient::getDisplayVsyncPeriod(int64_t display) {
@@ -439,31 +456,41 @@
         vtsDisplays.reserve(displays.size());
         for (int64_t display : displays) {
             auto vtsDisplay = VtsDisplay{display};
-            auto configs = getDisplayConfigs(display);
-            if (!configs.first.isOk()) {
-                ALOGE("Unable to get the displays for test, failed to get the configs "
-                      "for display %" PRId64,
-                      display);
-                return {std::move(configs.first), vtsDisplays};
-            }
-            for (int config : configs.second) {
-                auto status = addDisplayConfig(&vtsDisplay, config);
+            if (getDisplayConfigurationSupported()) {
+                auto [status, configs] = getDisplayConfigurations(display);
                 if (!status.isOk()) {
-                    ALOGE("Unable to get the displays for test, failed to add config "
+                    ALOGE("Unable to get the displays for test, failed to get the DisplayConfigs "
                           "for display %" PRId64,
                           display);
                     return {std::move(status), vtsDisplays};
                 }
+                addDisplayConfigs(&vtsDisplay, configs);
+            } else {
+                auto [status, configs] = getDisplayConfigs(display);
+                if (!status.isOk()) {
+                    ALOGE("Unable to get the displays for test, failed to get the configs "
+                          "for display %" PRId64,
+                          display);
+                    return {std::move(status), vtsDisplays};
+                }
+                for (int config : configs) {
+                    status = addDisplayConfigLegacy(&vtsDisplay, config);
+                    if (!status.isOk()) {
+                        ALOGE("Unable to get the displays for test, failed to add config "
+                              "for display %" PRId64,
+                              display);
+                        return {std::move(status), vtsDisplays};
+                    }
+                }
             }
-
-            auto config = getActiveConfig(display);
-            if (!config.first.isOk()) {
+            auto activeConfig = getActiveConfig(display);
+            if (!activeConfig.first.isOk()) {
                 ALOGE("Unable to get the displays for test, failed to get active config "
-                      "for display %" PRId64, display);
-                return {std::move(config.first), vtsDisplays};
+                      "for display %" PRId64,
+                      display);
+                return {std::move(activeConfig.first), vtsDisplays};
             }
-
-            auto status = updateDisplayProperties(&vtsDisplay, config.second);
+            auto status = updateDisplayProperties(&vtsDisplay, activeConfig.second);
             if (!status.isOk()) {
                 ALOGE("Unable to get the displays for test, "
                       "failed to update the properties "
@@ -480,39 +507,53 @@
     }
 }
 
-ScopedAStatus VtsComposerClient::addDisplayConfig(VtsDisplay* vtsDisplay, int32_t config) {
-    const auto width =
-            getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::WIDTH);
-    const auto height =
-            getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::HEIGHT);
+void VtsComposerClient::addDisplayConfigs(VtsDisplay* vtsDisplay,
+                                          const std::vector<DisplayConfiguration>& configs) {
+    for (const auto& config : configs) {
+        vtsDisplay->addDisplayConfig(config.configId, {config.vsyncPeriod, config.configGroup});
+    }
+}
+
+ScopedAStatus VtsComposerClient::addDisplayConfigLegacy(VtsDisplay* vtsDisplay, int32_t config) {
     const auto vsyncPeriod =
             getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::VSYNC_PERIOD);
     const auto configGroup =
             getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::CONFIG_GROUP);
-    if (width.first.isOk() && height.first.isOk() && vsyncPeriod.first.isOk() &&
-        configGroup.first.isOk()) {
+    if (vsyncPeriod.first.isOk() && configGroup.first.isOk()) {
         vtsDisplay->addDisplayConfig(config, {vsyncPeriod.second, configGroup.second});
         return ScopedAStatus::ok();
     }
 
-    LOG(ERROR) << "Failed to update display property for width: " << width.first.isOk()
-               << ", height: " << height.first.isOk() << ", vsync: " << vsyncPeriod.first.isOk()
+    LOG(ERROR) << "Failed to update display property vsync: " << vsyncPeriod.first.isOk()
                << ", config: " << configGroup.first.isOk();
     return ScopedAStatus::fromServiceSpecificError(IComposerClient::EX_BAD_CONFIG);
 }
 
 ScopedAStatus VtsComposerClient::updateDisplayProperties(VtsDisplay* vtsDisplay, int32_t config) {
-    const auto width =
-            getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::WIDTH);
-    const auto height =
-            getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::HEIGHT);
-    if (width.first.isOk() && height.first.isOk()) {
-        vtsDisplay->setDimensions(width.second, height.second);
-        return ScopedAStatus::ok();
-    }
+    if (getDisplayConfigurationSupported()) {
+        auto [status, configs] = getDisplayConfigurations(vtsDisplay->getDisplayId());
+        if (status.isOk()) {
+            for (const auto& displayConfig : configs) {
+                if (displayConfig.configId == config) {
+                    vtsDisplay->setDimensions(displayConfig.width, displayConfig.height);
+                    return ScopedAStatus::ok();
+                }
+            }
+        }
+        LOG(ERROR) << "Failed to update display property with DisplayConfig";
+    } else {
+        const auto width =
+                getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::WIDTH);
+        const auto height =
+                getDisplayAttribute(vtsDisplay->getDisplayId(), config, DisplayAttribute::HEIGHT);
+        if (width.first.isOk() && height.first.isOk()) {
+            vtsDisplay->setDimensions(width.second, height.second);
+            return ScopedAStatus::ok();
+        }
 
-    LOG(ERROR) << "Failed to update display property for width: " << width.first.isOk()
-               << ", height: " << height.first.isOk();
+        LOG(ERROR) << "Failed to update display property for width: " << width.first.isOk()
+                   << ", height: " << height.first.isOk();
+    }
     return ScopedAStatus::fromServiceSpecificError(IComposerClient::EX_BAD_CONFIG);
 }
 
@@ -576,6 +617,13 @@
     return isValid;
 }
 
+bool VtsComposerClient::getDisplayConfigurationSupported() const {
+    auto [status, interfaceVersion] = getInterfaceVersion();
+    EXPECT_TRUE(status.isOk());
+    // getDisplayConfigurations api is supported starting interface version 3
+    return interfaceVersion >= 3;
+}
+
 bool VtsComposerClient::destroyAllLayers() {
     std::unordered_map<int64_t, DisplayResource> physicalDisplays;
     while (!mDisplayResources.empty()) {
diff --git a/graphics/composer/aidl/vts/VtsComposerClient.h b/graphics/composer/aidl/vts/VtsComposerClient.h
index ea3318c..1add23c 100644
--- a/graphics/composer/aidl/vts/VtsComposerClient.h
+++ b/graphics/composer/aidl/vts/VtsComposerClient.h
@@ -61,7 +61,7 @@
 
     bool tearDown();
 
-    std::pair<ScopedAStatus, int32_t> getInterfaceVersion();
+    std::pair<ScopedAStatus, int32_t> getInterfaceVersion() const;
 
     std::pair<ScopedAStatus, VirtualDisplay> createVirtualDisplay(int32_t width, int32_t height,
                                                                   PixelFormat pixelFormat,
@@ -142,6 +142,9 @@
 
     std::pair<ScopedAStatus, std::vector<int32_t>> getDisplayConfigs(int64_t display);
 
+    std::pair<ScopedAStatus, std::vector<DisplayConfiguration>> getDisplayConfigurations(
+            int64_t display);
+
     std::pair<ScopedAStatus, int32_t> getDisplayVsyncPeriod(int64_t display);
 
     ScopedAStatus setAutoLowLatencyMode(int64_t display, bool isEnabled);
@@ -190,7 +193,9 @@
     std::vector<RefreshRateChangedDebugData> takeListOfRefreshRateChangedDebugData();
 
   private:
-    ScopedAStatus addDisplayConfig(VtsDisplay* vtsDisplay, int32_t config);
+    void addDisplayConfigs(VtsDisplay*, const std::vector<DisplayConfiguration>&);
+    ScopedAStatus addDisplayConfigLegacy(VtsDisplay*, int32_t config);
+    bool getDisplayConfigurationSupported() const;
     ScopedAStatus updateDisplayProperties(VtsDisplay* vtsDisplay, int32_t config);
 
     ScopedAStatus addDisplayToDisplayResources(int64_t display, bool isVirtual);
diff --git a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
index bbcd36f..d559213 100644
--- a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
+++ b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
@@ -1208,6 +1208,110 @@
     }
 }
 
+class GraphicsComposerAidlV3Test : public GraphicsComposerAidlTest {
+  protected:
+    void SetUp() override {
+        GraphicsComposerAidlTest::SetUp();
+        if (getInterfaceVersion() <= 2) {
+            GTEST_SKIP() << "Device interface version is expected to be >= 3";
+        }
+    }
+};
+
+TEST_P(GraphicsComposerAidlV3Test, GetDisplayConfigurations) {
+    for (const auto& display : mDisplays) {
+        const auto& [status, displayConfigurations] =
+                mComposerClient->getDisplayConfigurations(display.getDisplayId());
+        EXPECT_TRUE(status.isOk());
+        EXPECT_FALSE(displayConfigurations.empty());
+
+        for (const auto& displayConfig : displayConfigurations) {
+            EXPECT_NE(-1, displayConfig.width);
+            EXPECT_NE(-1, displayConfig.height);
+            EXPECT_NE(-1, displayConfig.vsyncPeriod);
+            EXPECT_NE(-1, displayConfig.configGroup);
+            if (displayConfig.dpi) {
+                EXPECT_NE(-1, displayConfig.dpi->x);
+                EXPECT_NE(-1, displayConfig.dpi->y);
+            }
+        }
+    }
+}
+
+TEST_P(GraphicsComposerAidlV3Test, GetDisplayConfigsIsSubsetOfGetDisplayConfigurations) {
+    for (const auto& display : mDisplays) {
+        const auto& [status, displayConfigurations] =
+                mComposerClient->getDisplayConfigurations(display.getDisplayId());
+        EXPECT_TRUE(status.isOk());
+
+        const auto& [legacyConfigStatus, legacyConfigs] =
+                mComposerClient->getDisplayConfigs(display.getDisplayId());
+        EXPECT_TRUE(legacyConfigStatus.isOk());
+        EXPECT_FALSE(legacyConfigs.empty());
+        EXPECT_TRUE(legacyConfigs.size() <= displayConfigurations.size());
+
+        for (const auto legacyConfigId : legacyConfigs) {
+            const auto& legacyWidth = mComposerClient->getDisplayAttribute(
+                    display.getDisplayId(), legacyConfigId, DisplayAttribute::WIDTH);
+            const auto& legacyHeight = mComposerClient->getDisplayAttribute(
+                    display.getDisplayId(), legacyConfigId, DisplayAttribute::HEIGHT);
+            const auto& legacyVsyncPeriod = mComposerClient->getDisplayAttribute(
+                    display.getDisplayId(), legacyConfigId, DisplayAttribute::VSYNC_PERIOD);
+            const auto& legacyConfigGroup = mComposerClient->getDisplayAttribute(
+                    display.getDisplayId(), legacyConfigId, DisplayAttribute::CONFIG_GROUP);
+            const auto& legacyDpiX = mComposerClient->getDisplayAttribute(
+                    display.getDisplayId(), legacyConfigId, DisplayAttribute::DPI_X);
+            const auto& legacyDpiY = mComposerClient->getDisplayAttribute(
+                    display.getDisplayId(), legacyConfigId, DisplayAttribute::DPI_Y);
+
+            EXPECT_TRUE(legacyWidth.first.isOk() && legacyHeight.first.isOk() &&
+                        legacyVsyncPeriod.first.isOk() && legacyConfigGroup.first.isOk());
+
+            EXPECT_TRUE(std::any_of(
+                    displayConfigurations.begin(), displayConfigurations.end(),
+                    [&](const auto& displayConfiguration) {
+                        const bool requiredAttributesPredicate =
+                                displayConfiguration.configId == legacyConfigId &&
+                                displayConfiguration.width == legacyWidth.second &&
+                                displayConfiguration.height == legacyHeight.second &&
+                                displayConfiguration.vsyncPeriod == legacyVsyncPeriod.second &&
+                                displayConfiguration.configGroup == legacyConfigGroup.second;
+
+                        if (!requiredAttributesPredicate) {
+                            // Required attributes did not match
+                            return false;
+                        }
+
+                        // Check optional attributes
+                        const auto& [legacyDpiXStatus, legacyDpiXValue] = legacyDpiX;
+                        const auto& [legacyDpiYStatus, legacyDpiYValue] = legacyDpiY;
+                        if (displayConfiguration.dpi) {
+                            if (!legacyDpiXStatus.isOk() || !legacyDpiYStatus.isOk()) {
+                                // getDisplayAttribute failed for optional attributes
+                                return false;
+                            }
+
+                            // DPI values in DisplayConfigurations are not scaled (* 1000.f)
+                            // the way they are in the legacy DisplayConfigs.
+                            constexpr float kEpsilon = 0.001f;
+                            return std::abs(displayConfiguration.dpi->x -
+                                            legacyDpiXValue / 1000.f) < kEpsilon &&
+                                   std::abs(displayConfiguration.dpi->y -
+                                            legacyDpiYValue / 1000.f) < kEpsilon;
+                        } else {
+                            return !legacyDpiXStatus.isOk() && !legacyDpiYStatus.isOk() &&
+                                   EX_SERVICE_SPECIFIC == legacyDpiXStatus.getExceptionCode() &&
+                                   EX_SERVICE_SPECIFIC == legacyDpiYStatus.getExceptionCode() &&
+                                   IComposerClient::EX_UNSUPPORTED ==
+                                           legacyDpiXStatus.getServiceSpecificError() &&
+                                   IComposerClient::EX_UNSUPPORTED ==
+                                           legacyDpiYStatus.getServiceSpecificError();
+                        }
+                    }));
+        }
+    }
+}
+
 // Tests for Command.
 class GraphicsComposerAidlCommandTest : public GraphicsComposerAidlTest {
   protected:
@@ -2641,6 +2745,11 @@
         PerInstance, GraphicsComposerAidlV2Test,
         testing::ValuesIn(::android::getAidlHalInstanceNames(IComposer::descriptor)),
         ::android::PrintInstanceNameToString);
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(GraphicsComposerAidlV3Test);
+INSTANTIATE_TEST_SUITE_P(
+        PerInstance, GraphicsComposerAidlV3Test,
+        testing::ValuesIn(::android::getAidlHalInstanceNames(IComposer::descriptor)),
+        ::android::PrintInstanceNameToString);
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(GraphicsComposerAidlCommandV2Test);
 INSTANTIATE_TEST_SUITE_P(
         PerInstance, GraphicsComposerAidlCommandV2Test,