thermald: log screen brightness (#22570)

* thermald: log screen brightness

* bump cereal
old-commit-hash: d708b5b5464811dc6b58b7e88dfe614f90170723

selfdrive/hardware/base.py

@@ -110,6 +110,10 @@ class HardwareBase:
   def set_screen_brightness(self, percentage):
     pass
 
+  @abstractmethod
+  def get_screen_brightness(self):
+    pass
+
   @abstractmethod
   def set_power_save(self, powersave_enabled):
     pass

selfdrive/hardware/eon/hardware.py

@@ -375,6 +375,13 @@ class Android(HardwareBase):
     with open("/sys/class/leds/lcd-backlight/brightness", "w") as f:
       f.write(str(int(percentage * 2.55)))
 
+  def get_screen_brightness(self):
+    try:
+      with open("/sys/class/leds/lcd-backlight/brightness") as f:
+        return int(float(f.read()) / 2.55)
+    except Exception:
+      return 0
+
   def set_power_save(self, powersave_enabled):
     pass
 

selfdrive/hardware/pc/hardware.py

@@ -83,6 +83,9 @@ class Pc(HardwareBase):
   def set_screen_brightness(self, percentage):
     pass
 
+  def get_screen_brightness(self):
+    return 0
+
   def set_power_save(self, powersave_enabled):
     pass
 

selfdrive/hardware/tici/hardware.py

@@ -283,6 +283,13 @@ class Tici(HardwareBase):
     except Exception:
       pass
 
+  def get_screen_brightness(self):
+    try:
+      with open("/sys/class/backlight/panel0-backlight/brightness") as f:
+        return int(float(f.read()) / 10.23)
+    except Exception:
+      return 0
+
   def set_power_save(self, powersave_enabled):
     # amplifier, 100mW at idle
     self.amplifier.set_global_shutdown(amp_disabled=powersave_enabled)

selfdrive/thermald/thermald.py

@@ -290,6 +290,7 @@ def thermald_thread():
     if modem_temps is not None:
       msg.deviceState.modemTempC = modem_temps
 
+    msg.deviceState.screenBrightnessPercent = HARDWARE.get_screen_brightness()
     msg.deviceState.batteryPercent = HARDWARE.get_battery_capacity()
     msg.deviceState.batteryCurrent = HARDWARE.get_battery_current()
     msg.deviceState.usbOnline = HARDWARE.get_usb_present()