Notify CameraService on USB host events

 For handling external (USB) cameras when using
 lazy camera HALs.

Test: atest cameraservice_test

Bug: 191248460

Change-Id: I65b683e449577f576dc210a768ca7756394742a3

1 files changed, 40 insertions, 0 deletions

diff --git a/services/core/java/com/android/server/camera/CameraServiceProxy.java b/services/core/java/com/android/server/camera/CameraServiceProxy.java
index 3120dc58eebd..272d003566c5 100644
--- a/services/core/java/com/android/server/camera/CameraServiceProxy.java
+++ b/services/core/java/com/android/server/camera/CameraServiceProxy.java
@@ -46,6 +46,8 @@ import android.hardware.camera2.CaptureRequest;
 import android.hardware.devicestate.DeviceStateManager;
 import android.hardware.devicestate.DeviceStateManager.FoldStateListener;
 import android.hardware.display.DisplayManager;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbManager;
 import android.media.AudioManager;
 import android.nfc.INfcAdapter;
 import android.os.Binder;
@@ -335,6 +337,16 @@ public class CameraServiceProxy extends SystemService
                         switchUserLocked(mLastUser);
                     }
                     break;
+                case UsbManager.ACTION_USB_DEVICE_ATTACHED:
+                case UsbManager.ACTION_USB_DEVICE_DETACHED:
+                    synchronized (mLock) {
+                        UsbDevice device = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
+                        if (device != null) {
+                            notifyUsbDeviceHotplugLocked(device,
+                                    action.equals(UsbManager.ACTION_USB_DEVICE_ATTACHED));
+                        }
+                    }
+                    break;
                 default:
                     break; // do nothing
             }
@@ -645,6 +657,8 @@ public class CameraServiceProxy extends SystemService
         filter.addAction(Intent.ACTION_USER_INFO_CHANGED);
         filter.addAction(Intent.ACTION_MANAGED_PROFILE_ADDED);
         filter.addAction(Intent.ACTION_MANAGED_PROFILE_REMOVED);
+        filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
+        filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
         mContext.registerReceiver(mIntentReceiver, filter);
 
         publishBinderService(CAMERA_SERVICE_PROXY_BINDER_NAME, mCameraServiceProxy);
@@ -961,6 +975,32 @@ public class CameraServiceProxy extends SystemService
         return true;
     }
 
+    private boolean notifyUsbDeviceHotplugLocked(@NonNull UsbDevice device, boolean attached) {
+        // Only handle external USB camera devices
+        if (device.getHasVideoCapture()) {
+            // Forward the usb hotplug event to the native camera service running in the
+            // cameraserver
+            // process.
+            ICameraService cameraService = getCameraServiceRawLocked();
+            if (cameraService == null) {
+                Slog.w(TAG, "Could not notify cameraserver, camera service not available.");
+                return false;
+            }
+
+            try {
+                int eventType = attached ? ICameraService.EVENT_USB_DEVICE_ATTACHED
+                        : ICameraService.EVENT_USB_DEVICE_DETACHED;
+                mCameraServiceRaw.notifySystemEvent(eventType, new int[]{device.getDeviceId()});
+            } catch (RemoteException e) {
+                Slog.w(TAG, "Could not notify cameraserver, remote exception: " + e);
+                // Not much we can do if camera service is dead.
+                return false;
+            }
+            return true;
+        }
+        return false;
+    }
+
     private void updateActivityCount(CameraSessionStats cameraState) {
         String cameraId = cameraState.getCameraId();
         int newCameraState = cameraState.getNewCameraState();