diff --git a/camera/device/3.4/ICameraDeviceSession.hal b/camera/device/3.4/ICameraDeviceSession.hal
index 71a4b34..4ce749d 100644
--- a/camera/device/3.4/ICameraDeviceSession.hal
+++ b/camera/device/3.4/ICameraDeviceSession.hal
@@ -20,7 +20,6 @@
 import @3.3::ICameraDeviceSession;
 import @3.3::HalStreamConfiguration;
 import @3.2::BufferCache;
-import @3.2::CaptureRequest;
 
 /**
  * Camera device active session interface.
@@ -72,4 +71,38 @@
     configureStreams_3_4(@3.4::StreamConfiguration requestedConfiguration)
             generates (Status status,
                        @3.4::HalStreamConfiguration halConfiguration);
+
+    /**
+     * processCaptureRequest_3_4:
+     *
+     * Identical to @3.2::ICameraDeviceSession.processCaptureRequest, except that:
+     *
+     * - The capture request can include individual settings for physical camera devices
+     *   backing a logical multi-camera.
+     *
+     * @return status Status code for the operation, one of:
+     *     OK:
+     *         On a successful start to processing the capture request
+     *     ILLEGAL_ARGUMENT:
+     *         If the input is malformed (the settings are empty when not
+     *         allowed, the physical camera settings are invalid, there are 0
+     *         output buffers, etc) and capture processing
+     *         cannot start. Failures during request processing must be
+     *         handled by calling ICameraDeviceCallback::notify(). In case of
+     *         this error, the framework retains responsibility for the
+     *         stream buffers' fences and the buffer handles; the HAL must not
+     *         close the fences or return these buffers with
+     *         ICameraDeviceCallback::processCaptureResult().
+     *     INTERNAL_ERROR:
+     *         If the camera device has encountered a serious error. After this
+     *         error is returned, only the close() method can be successfully
+     *         called by the framework.
+     * @return numRequestProcessed Number of requests successfully processed by
+     *     camera HAL. When status is OK, this must be equal to the size of
+     *     requests. When the call fails, this number is the number of requests
+     *     that HAL processed successfully before HAL runs into an error.
+     *
+     */
+    processCaptureRequest_3_4(vec<CaptureRequest> requests, vec<BufferCache> cachesToRemove)
+            generates (Status status, uint32_t numRequestProcessed);
 };