[fingerprint] Disable fp wakeup when lid is closed. Fixes JB#46167

Lid sensor state is not taken into account when deciding whether
fingerprint wake-ups should be enabled or not. In devices where
fingerprint sensor is physically reachable also when folding cover
is closed, this easily leads to accidental unblanking while putting
the device to pocket.

Disable fingerprint wake-ups when lid sensor is closed (and "Use flip
cover to control display" has been selected in settings).

Signed-off-by: Simo Piiroinen <simo.piiroinen@jollamobile.com>

modules/fingerprint.c

@@ -288,6 +288,7 @@ static void  fingerprint_datapipe_display_state_next_cb      (gconstpointer data
 static void  fingerprint_datapipe_interaction_expected_cb    (gconstpointer data);
 static void  fingerprint_datapipe_topmost_window_pid_cb      (gconstpointer data);
 static void  fingerprint_datapipe_proximity_sensor_actual_cb (gconstpointer data);
+static void  fingerprint_datapipe_lid_sensor_filtered_cb     (gconstpointer data);
 static void  fingerprint_datapipe_keypress_event_cb          (gconstpointer const data);
 static void  fingerprint_datapipe_init                       (void);
 static void  fingerprint_datapipe_quit                       (void);
@@ -379,6 +380,9 @@ static int topmost_window_pid = -1;
 /** Cached proximity sensor state */
 static cover_state_t proximity_sensor_actual = COVER_UNDEF;
 
+/** Lid cover policy state; assume unknown */
+static cover_state_t lid_sensor_filtered = COVER_UNDEF;
+
 /** Cached power key pressed down state */
 static bool powerkey_pressed = false;
 
@@ -1576,6 +1580,27 @@ fingerprint_datapipe_proximity_sensor_actual_cb(gconstpointer data)
     return;
 }
 
+/** Change notifications from lid_sensor_filtered_pipe
+ */
+static void
+fingerprint_datapipe_lid_sensor_filtered_cb(gconstpointer data)
+{
+    cover_state_t prev = lid_sensor_filtered;
+    lid_sensor_filtered = GPOINTER_TO_INT(data);
+
+    if( lid_sensor_filtered == prev )
+        goto EXIT;
+
+    mce_log(LL_DEBUG, "lid_sensor_filtered = %s -> %s",
+            cover_state_repr(prev),
+            cover_state_repr(lid_sensor_filtered));
+
+    fpwakeup_schedule_rethink();
+
+EXIT:
+    return;
+}
+
 /** Datapipe trigger for power key events
  *
  * @param data A pointer to the input_event struct
@@ -1663,6 +1688,10 @@ static datapipe_handler_t fingerprint_datapipe_handlers[] =
         .datapipe  = &proximity_sensor_actual_pipe,
         .output_cb = fingerprint_datapipe_proximity_sensor_actual_cb,
     },
+    {
+        .datapipe  = &lid_sensor_filtered_pipe,
+        .output_cb = fingerprint_datapipe_lid_sensor_filtered_cb,
+    },
     // sentinel
     {
         .datapipe = 0,
@@ -2419,8 +2448,15 @@ fpwakeup_evaluate_allowed(void)
     case FPWAKEUP_ENABLE_NEVER:
         goto EXIT;
     case FPWAKEUP_ENABLE_ALWAYS:
+        /* Lid must not be closed */
+        if( lid_sensor_filtered == COVER_CLOSED )
+            goto EXIT;
+        /* Proximity sensor state: don't care */
         break;
     case FPWAKEUP_ENABLE_NO_PROXIMITY:
+        /* Lid must not be closed */
+        if( lid_sensor_filtered == COVER_CLOSED )
+            goto EXIT;
         /* Proximity sensor must not be covered or unknown */
         if( proximity_sensor_actual != COVER_OPEN )
             goto EXIT;