diff --git a/include/hardware/tv_input.h b/include/hardware/tv_input.h
index ed3fafb..3bb9862 100644
--- a/include/hardware/tv_input.h
+++ b/include/hardware/tv_input.h
@@ -33,14 +33,18 @@
  *
  * Version History:
  *
- * TV_INPUT_MODULE_API_VERSION_0_1:
- * Initial TV input hardware module API.
+ * TV_INPUT_DEVICE_API_VERSION_0_1:
+ * Initial TV input hardware device API.
+ *
+ * TV_INPUT_DEVICE_API_VERSION_0_2:
+ * Minor revision --- add video detection flag in stream configs.
  *
  */
 
 #define TV_INPUT_MODULE_API_VERSION_0_1  HARDWARE_MODULE_API_VERSION(0, 1)
 
 #define TV_INPUT_DEVICE_API_VERSION_0_1  HARDWARE_DEVICE_API_VERSION(0, 1)
+#define TV_INPUT_DEVICE_API_VERSION_0_2  HARDWARE_DEVICE_API_VERSION(0, 2)
 
 /*
  * The id of this module
@@ -164,7 +168,8 @@
      * port. the framework regards input devices with no available streams as
      * disconnected, so the implementation can generate this event with no
      * available streams to indicate that this device is disconnected, and vice
-     * versa.
+     * versa. In addition, streams have signal detection flag to denote if
+     * signal is detected for sure.
      */
     TV_INPUT_EVENT_STREAM_CONFIGURATIONS_CHANGED = 3,
     /*
@@ -264,6 +269,33 @@
     uint32_t max_video_height;
 } tv_stream_config_t;
 
+enum {
+    /*
+     * Set if signal is detected on this stream. Note that even if this mask is
+     * unset it does not necessarily mean no signal --- it denotes that HAL is
+     * unsure of the signal status.
+     */
+    TV_STREAM_FLAG_MASK_SIGNAL_DETECTION = 0x1,
+};
+
+/*
+ * >= TV_INPUT_DEVICE_API_VERSION_0_2
+ *
+ * tv_stream_config_t extended in a way that allows extension without breaking
+ * binary compatibility
+ */
+typedef struct tv_stream_config_ext {
+    tv_stream_config_t config;
+
+    /*
+     * Flags to show the status of this stream. See TV_STREAM_FLAG_* for
+     * details.
+     */
+    uint32_t flags;
+
+    int32_t reserved[16 - 1];
+} tv_stream_config_ext_t;
+
 typedef struct buffer_producer_stream {
     /*
      * IN/OUT: Width / height of the stream. Client may request for specific
@@ -397,7 +429,22 @@
     int (*cancel_capture)(struct tv_input_device* dev, int device_id,
             int stream_id, uint32_t seq);
 
-    void* reserved[16];
+    /*
+     * get_stream_configurations_ext:
+     *
+     * Get stream configurations for a specific device. An input device may have
+     * multiple configurations.
+     *
+     * The configs object is guaranteed to be valid only until the next call to
+     * get_stream_configurations_ext() or STREAM_CONFIGURATIONS_CHANGED event.
+     *
+     * Return 0 on success.
+     */
+    int (*get_stream_configurations_ext)(const struct tv_input_device* dev,
+            int device_id, int* num_configurations,
+            const tv_stream_config_ext_t** configs);
+
+    void* reserved[16 - 1];
 } tv_input_device_t;
 
 __END_DECLS
diff --git a/modules/tv_input/tv_input.cpp b/modules/tv_input/tv_input.cpp
index 114e80e..45e8388 100644
--- a/modules/tv_input/tv_input.cpp
+++ b/modules/tv_input/tv_input.cpp
@@ -37,18 +37,18 @@
         const char* name, struct hw_device_t** device);
 
 static struct hw_module_methods_t tv_input_module_methods = {
-    open: tv_input_device_open
+    .open = tv_input_device_open
 };
 
 tv_input_module_t HAL_MODULE_INFO_SYM = {
-    common: {
-        tag: HARDWARE_MODULE_TAG,
-        version_major: 0,
-        version_minor: 1,
-        id: TV_INPUT_HARDWARE_MODULE_ID,
-        name: "Sample TV input module",
-        author: "The Android Open Source Project",
-        methods: &tv_input_module_methods,
+    .common = {
+        .tag = HARDWARE_MODULE_TAG,
+        .version_major = 0,
+        .version_minor = 1,
+        .id = TV_INPUT_HARDWARE_MODULE_ID,
+        .name = "Sample TV input module",
+        .author = "The Android Open Source Project",
+        .methods = &tv_input_module_methods,
     }
 };
 
@@ -72,7 +72,8 @@
 }
 
 static int tv_input_get_stream_configurations(
-        const struct tv_input_device*, int, int*, const tv_stream_config_t**)
+        const struct tv_input_device*, int, int*,
+        const tv_stream_config_t**)
 {
     return -EINVAL;
 }
@@ -98,6 +99,13 @@
     return -EINVAL;
 }
 
+static int tv_input_get_stream_configurations_ext(
+        const struct tv_input_device*, int, int*,
+        const tv_stream_config_ext_t**)
+{
+    return -EINVAL;
+}
+
 /*****************************************************************************/
 
 static int tv_input_device_close(struct hw_device_t *dev)
@@ -134,6 +142,8 @@
         dev->device.close_stream = tv_input_close_stream;
         dev->device.request_capture = tv_input_request_capture;
         dev->device.cancel_capture = tv_input_cancel_capture;
+        dev->device.get_stream_configurations_ext =
+                tv_input_get_stream_configurations_ext;
 
         *device = &dev->device.common;
         status = 0;