Screen brightness control

Added toggle to control the screen brightness.

selfdrive/ui/ui.cc

@@ -352,6 +352,7 @@ void ui_update_frogpilot_params(UIState *s) {
   scene.hide_speed_ui = scene.hide_speed && params.getBool("HideSpeedUI");
 
   scene.rotating_wheel = params.getBool("RotatingWheel");
+  scene.screen_brightness = params.getInt("ScreenBrightness");
 }
 
 void UIState::updateStatus() {
@@ -493,6 +494,9 @@ void Device::updateBrightness(const UIState &s) {
   int brightness = brightness_filter.update(clipped_brightness);
   if (!awake) {
     brightness = 0;
+  } else if (s.scene.screen_brightness <= 100) {
+    // Bring the screen brightness up to 5% upon screen tap
+    brightness = fmax(5, s.scene.screen_brightness);
   }
 
   if (brightness != last_brightness) {
@@ -513,7 +517,11 @@ void Device::updateWakefulness(const UIState &s) {
     emit interactiveTimeout();
   }
 
-  setAwake(s.scene.ignition || interactive_timeout > 0);
+  if (s.scene.screen_brightness != 0) {
+    setAwake(s.scene.ignition || interactive_timeout > 0);
+  } else {
+    setAwake(interactive_timeout > 0);
+  }
 }
 
 UIState *uiState() {

selfdrive/ui/ui.h

@@ -236,6 +236,7 @@ typedef struct UIScene {
   int desired_follow;
   int obstacle_distance;
   int obstacle_distance_stock;
+  int screen_brightness;
   int steering_angle_deg;
   int stopped_equivalence;