Assign local device portId 0

Before, the local device on a TV would be assigned an invalid portId,
which was causing the local device to be removed from the HdmiCecNetwork
in some instances.

Bug: 213423171
Test: atest HdmiCecNetworkTest
Change-Id: I99e1ca1d54a74682c0737deb2ad2163f7db5e0db
Merged-In: I99e1ca1d54a74682c0737deb2ad2163f7db5e0db

services/core/java/com/android/server/hdmi/HdmiCecNetwork.java

@@ -865,10 +865,13 @@ public class HdmiCecNetwork {
      * on the current device.
      */
     int physicalAddressToPortId(int path) {
+        int physicalAddress = getPhysicalAddress();
+        if (path == physicalAddress) {
+            // The local device isn't connected to any port; assign portId 0
+            return Constants.CEC_SWITCH_HOME;
+        }
         int mask = 0xF000;
         int finalMask = 0xF000;
-        int physicalAddress;
-        physicalAddress = getPhysicalAddress();
         int maskedAddress = physicalAddress;
 
         while (maskedAddress != 0) {

services/tests/servicestests/src/com/android/server/hdmi/HdmiCecNetworkTest.java

@@ -141,6 +141,22 @@ public class HdmiCecNetworkTest {
                 Constants.INVALID_PORT_ID);
     }
 
+    @Test
+    public void physicalAddressToPort_localDevice_weAreSourceDevice() {
+        mNativeWrapper.setPhysicalAddress(0x2000);
+        mHdmiCecNetwork.initPortInfo();
+        assertThat(mHdmiCecNetwork.physicalAddressToPortId(0x2000))
+                .isEqualTo(Constants.CEC_SWITCH_HOME);
+    }
+
+    @Test
+    public void physicalAddressToPort_localDevice_weAreTv() {
+        mNativeWrapper.setPhysicalAddress(0x0000);
+        mHdmiCecNetwork.initPortInfo();
+        assertThat(mHdmiCecNetwork.physicalAddressToPortId(0x0000))
+                .isEqualTo(Constants.CEC_SWITCH_HOME);
+    }
+
     @Test
     public void localDevices_verifyOne_tv() {
         mHdmiCecNetwork.clearLocalDevices();