CEC: Add logic to return to internal source

This CL introduces a logic that, upon receiving <Inactive Source>
from the active source or a corresponding MHL subcommand, lets
the service return to one of internal inputs.

Introduced to handle it is a new type for HdmiDevice (INACTIVE)
that will be passed to input change listeners. The callback
is expected to transform to other mechanism such as intent,
to let TV app to decide which input to switch to, which will
be one of non-HDMI input that was viewed previously.

Bug: 19008579

Change-Id: I1922f4cd20e9220411061bb9d9fbe5fbc5676d48

2 files changed, 21 insertions, 12 deletions

diff --git a/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java b/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java
index 4673b8c..43ef457 100644
--- a/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java
+++ b/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java
@@ -476,7 +476,7 @@ final class HdmiCecLocalDeviceTv extends HdmiCecLocalDevice {
         HdmiDeviceInfo info = getCecDeviceInfo(logicalAddress);
         if (info == null) {
             if (!handleNewDeviceAtTheTailOfActivePath(physicalAddress)) {
-                HdmiLogger.debug("Device info not found: %X; buffering the command", logicalAddress);
+                HdmiLogger.debug("Device info %X not found; buffering the command", logicalAddress);
                 mDelayedMessageBuffer.add(message);
             }
         } else if (!isInputReady(info.getId())) {
@@ -517,6 +517,12 @@ final class HdmiCecLocalDeviceTv extends HdmiCecLocalDevice {
 
             doManualPortSwitching(portId, null);
             setPrevPortId(Constants.INVALID_PORT_ID);
+        } else {
+            // No HDMI port to switch to was found. Notify the input change listers to
+            // switch to the lastly shown internal input.
+            mActiveSource.invalidate();
+            setActivePath(Constants.INVALID_PHYSICAL_ADDRESS);
+            mService.invokeInputChangeListener(HdmiDeviceInfo.INACTIVE_DEVICE);
         }
         return true;
     }
@@ -1826,6 +1832,7 @@ final class HdmiCecLocalDeviceTv extends HdmiCecLocalDevice {
         pw.println("mAutoDeviceOff: " + mAutoDeviceOff);
         pw.println("mAutoWakeup: " + mAutoWakeup);
         pw.println("mSkipRoutingControl: " + mSkipRoutingControl);
+        pw.println("mPrevPortId: " + mPrevPortId);
         pw.println("CEC devices:");
         pw.increaseIndent();
         for (HdmiDeviceInfo info : mSafeAllDeviceInfos) {
diff --git a/services/core/java/com/android/server/hdmi/HdmiControlService.java b/services/core/java/com/android/server/hdmi/HdmiControlService.java
index fa8ab59..9f78c61 100644
--- a/services/core/java/com/android/server/hdmi/HdmiControlService.java
+++ b/services/core/java/com/android/server/hdmi/HdmiControlService.java
@@ -2252,16 +2252,17 @@ public final class HdmiControlService extends SystemService {
         assertRunOnServiceThread();
         if (tv() == null) return;
         final int lastInput = contentOn ? tv().getActivePortId() : Constants.INVALID_PORT_ID;
-        tv().doManualPortSwitching(portId, new IHdmiControlCallback.Stub() {
-            @Override
-            public void onComplete(int result) throws RemoteException {
-                // Keep the last input to switch back later when RAP[ContentOff] is received.
-                // This effectively sets the port to invalid one if the switching is for
-                // RAP[ContentOff].
-                setLastInputForMhl(lastInput);
-            }
-        });
-
+        if (portId != Constants.INVALID_PORT_ID) {
+            tv().doManualPortSwitching(portId, new IHdmiControlCallback.Stub() {
+                @Override
+                public void onComplete(int result) throws RemoteException {
+                    // Keep the last input to switch back later when RAP[ContentOff] is received.
+                    // This effectively sets the port to invalid one if the switching is for
+                    // RAP[ContentOff].
+                    setLastInputForMhl(lastInput);
+                }
+            });
+        }
         // MHL device is always directly connected to the port. Update the active port ID to avoid
         // unnecessary post-routing control task.
         tv().setActivePortId(portId);
@@ -2271,7 +2272,8 @@ public final class HdmiControlService extends SystemService {
         // may not be the MHL-enabled one. In this case the device info to be passed to
         // input change listener should be the one describing the corresponding HDMI port.
         HdmiMhlLocalDeviceStub device = mMhlController.getLocalDevice(portId);
-        HdmiDeviceInfo info = (device != null) ? device.getInfo() : mPortDeviceMap.get(portId);
+        HdmiDeviceInfo info = (device != null) ? device.getInfo()
+                : mPortDeviceMap.get(portId, HdmiDeviceInfo.INACTIVE_DEVICE);
         invokeInputChangeListener(info);
     }