Provide separate datapipes for raw and filtered ALS data

By default the ALS data is median filtered, which makes it too slow
reacting to be used for things like substitute for proximity sensor
and only the filtered state can be subscribed to.

Make it possible for mce logic to subscribe to also raw als data
by providing a separate data pipe for it.

[mce] Provide separate datapipes for raw and filtered ALS data. Contributes to JB#29011

datapipe.c

@@ -103,6 +103,9 @@ datapipe_struct proximity_sensor_pipe;
 /** Ambient light sensor; read only */
 datapipe_struct ambient_light_sensor_pipe;
 
+/** Filtered ambient light level; read only */
+datapipe_struct ambient_light_level_pipe;
+
 /** Orientation sensor; read only */
 datapipe_struct orientation_sensor_pipe;
 
@@ -853,6 +856,8 @@ void mce_datapipe_init(void)
 		       0, GINT_TO_POINTER(COVER_OPEN));
 	setup_datapipe(&ambient_light_sensor_pipe, READ_ONLY, DONT_FREE_CACHE,
 		       0, GINT_TO_POINTER(400));
+	setup_datapipe(&ambient_light_level_pipe, READ_ONLY, DONT_FREE_CACHE,
+		       0, GINT_TO_POINTER(400));
 	setup_datapipe(&orientation_sensor_pipe, READ_ONLY, DONT_FREE_CACHE,
 		       0, GINT_TO_POINTER(MCE_ORIENTATION_UNDEFINED));
 	setup_datapipe(&tk_lock_pipe, READ_ONLY, DONT_FREE_CACHE,
@@ -929,6 +934,7 @@ void mce_datapipe_quit(void)
 	free_datapipe(&tk_lock_pipe);
 	free_datapipe(&proximity_sensor_pipe);
 	free_datapipe(&ambient_light_sensor_pipe);
+	free_datapipe(&ambient_light_level_pipe);
 	free_datapipe(&orientation_sensor_pipe);
 	free_datapipe(&lens_cover_pipe);
 	free_datapipe(&lid_cover_sensor_pipe);

datapipe.h

@@ -113,6 +113,7 @@ extern datapipe_struct lid_cover_policy_pipe;
 extern datapipe_struct lens_cover_pipe;
 extern datapipe_struct proximity_sensor_pipe;
 extern datapipe_struct ambient_light_sensor_pipe;
+extern datapipe_struct ambient_light_level_pipe;
 extern datapipe_struct orientation_sensor_pipe;
 extern datapipe_struct alarm_ui_state_pipe;
 extern datapipe_struct system_state_pipe;

modules/filter-brightness-als.c

@@ -661,7 +661,7 @@ static void inputflt_sampling_output(int lux)
 
 	run_datapipes();
 
-	execute_datapipe(&ambient_light_sensor_pipe,
+	execute_datapipe(&ambient_light_level_pipe,
 			 GINT_TO_POINTER(als_lux_latest),
 			 USE_INDATA, CACHE_INDATA);
 EXIT:
@@ -795,6 +795,10 @@ static void als_lux_changed(unsigned lux_)
 	}
 
 	inputflt_sampling_input(als_lux_cached);
+
+	execute_datapipe(&ambient_light_sensor_pipe,
+			 GINT_TO_POINTER(als_lux_cached),
+			 USE_INDATA, CACHE_INDATA);
 }
 
 /** Check if ALS sensor should be enabled or disabled