GM Camera: use ECM brake pressed bit (#26400)

* GM camera: use ECM brake pressed bit

* bump panda and use more reliable bit

* bump panda

* back to ECMEngineStatus

* bump

* Update selfdrive/car/gm/carstate.py

* bump panda

* Update ref_commit

selfdrive/car/gm/carstate.py

@@ -51,12 +51,15 @@ class CarState(CarStateBase):
     else:
       ret.gearShifter = self.parse_gear_shifter(self.shifter_values.get(pt_cp.vl["ECMPRDNL2"]["PRNDL2"], None))
 
-    # Some Volt 2016-17 have loose brake pedal push rod retainers which causes the ECM to believe
-    # that the brake is being intermittently pressed without user interaction.
-    # To avoid a cruise fault we need to match the ECM's brake pressed signal and threshold
-    # https://static.nhtsa.gov/odi/tsbs/2017/MC-10137629-9999.pdf
     ret.brake = pt_cp.vl["ECMAcceleratorPos"]["BrakePedalPos"]
-    ret.brakePressed = ret.brake >= 8
+    if self.CP.networkLocation == NetworkLocation.fwdCamera:
+      ret.brakePressed = pt_cp.vl["ECMEngineStatus"]["BrakePressed"] != 0
+    else:
+      # Some Volt 2016-17 have loose brake pedal push rod retainers which causes the ECM to believe
+      # that the brake is being intermittently pressed without user interaction.
+      # To avoid a cruise fault we need to use a conservative brake position threshold
+      # https://static.nhtsa.gov/odi/tsbs/2017/MC-10137629-9999.pdf
+      ret.brakePressed = ret.brake >= 8
 
     # Regen braking is braking
     if self.CP.transmissionType == TransmissionType.direct:
@@ -154,6 +157,7 @@ class CarState(CarStateBase):
       ("TractionControlOn", "ESPStatus"),
       ("ParkBrake", "VehicleIgnitionAlt"),
       ("CruiseMainOn", "ECMEngineStatus"),
+      ("BrakePressed", "ECMEngineStatus"),
     ]
 
     checks = [

selfdrive/test/process_replay/ref_commit

@@ -1 +1 @@
-caa8fb2a046a6c2c186e66af339212a5fae6b7a4
+372a67c524342bbf15e22f0caea08d2038973281