add set_display_power to hardware.py

system/hardware/base.py

@@ -130,6 +130,10 @@ class HardwareBase(ABC):
   def get_thermal_config(self):
     return ThermalConfig()
 
+  @abstractmethod
+  def set_display_power(self, on: bool):
+    pass
+
   @abstractmethod
   def set_screen_brightness(self, percentage):
     pass

system/hardware/pc/hardware.py

@@ -53,6 +53,9 @@ class Pc(HardwareBase):
   def shutdown(self):
     print("SHUTDOWN!")
 
+  def set_display_power(self, on):
+    pass
+
   def set_screen_brightness(self, percentage):
     pass
 

system/hardware/tici/hardware.py

@@ -341,6 +341,13 @@ class Tici(HardwareBase):
                          exhaust=exhaust,
                          case=case)
 
+  def set_display_power(self, on):
+    try:
+      with open("/sys/class/backlight/panel0-backlight/bl_power", "w") as f:
+        f.write("0" if on else "4")
+    except Exception:
+      pass
+
   def set_screen_brightness(self, percentage):
     try:
       with open("/sys/class/backlight/panel0-backlight/max_brightness") as f: