GM camera ACC: reliable relay closing (#27164)

* Reliable relay open

* Reliable relay close

* ign in a loop

* fixes

* we need this

* log

* comment to remind me tmrw

* ign fix

* this makes it 2x more reliable, but messyyy

* Revert "this makes it 2x more reliable, but messyyy"

This reverts commit 03401dc4a7.

* revert non-related stuff

* comments, spaces

* a stands for indefinite article

* not applicable for non-camera acc

* something...

* Revert "something..."

This reverts commit de8a158488.

* Update ref_commit

selfdrive/car/gm/carcontroller.py

@@ -50,9 +50,14 @@ class CarController:
 
     # Steering (Active: 50Hz, inactive: 10Hz)
     # Attempt to sync with camera on startup at 50Hz, first few msgs are blocked
-    init_lka_counter = not self.sent_lka_steering_cmd and self.CP.networkLocation == NetworkLocation.fwdCamera
+    init_lka_counter = not self.sent_lka_steering_cmd
+    # Also send at 50Hz until we're in sync with camera so counters align when relay closes, preventing a fault
+    # openpilot can subtly drift, so this is activated throughout a drive to stay synced
+    out_of_sync = self.lka_steering_cmd_counter % 4 != (CS.camera_lka_steering_cmd_counter + 1) % 4
+    sync_steer = (init_lka_counter or out_of_sync) and self.CP.networkLocation == NetworkLocation.fwdCamera
+
     steer_step = self.params.INACTIVE_STEER_STEP
-    if CC.latActive or init_lka_counter:
+    if CC.latActive or sync_steer:
       steer_step = self.params.STEER_STEP
 
     # Avoid GM EPS faults when transmitting messages too close together: skip this transmit if we just received the

selfdrive/car/gm/carstate.py

@@ -19,6 +19,7 @@ class CarState(CarStateBase):
     self.shifter_values = can_define.dv["ECMPRDNL2"]["PRNDL2"]
     self.loopback_lka_steering_cmd_updated = False
     self.pt_lka_steering_cmd_counter = 0
+    self.camera_lka_steering_cmd_counter = 0
     self.buttons_counter = 0
 
   def update(self, pt_cp, cam_cp, loopback_cp):
@@ -34,6 +35,7 @@ class CarState(CarStateBase):
     self.loopback_lka_steering_cmd_updated = len(loopback_cp.vl_all["ASCMLKASteeringCmd"]["RollingCounter"]) > 0
     if self.CP.networkLocation == NetworkLocation.fwdCamera:
       self.pt_lka_steering_cmd_counter = pt_cp.vl["ASCMLKASteeringCmd"]["RollingCounter"]
+      self.camera_lka_steering_cmd_counter = cam_cp.vl["ASCMLKASteeringCmd"]["RollingCounter"]
 
     ret.wheelSpeeds = self.get_wheel_speeds(
       pt_cp.vl["EBCMWheelSpdFront"]["FLWheelSpd"],
@@ -113,11 +115,13 @@ class CarState(CarStateBase):
     if CP.networkLocation == NetworkLocation.fwdCamera:
       signals += [
         ("AEBCmdActive", "AEBCmd"),
+        ("RollingCounter", "ASCMLKASteeringCmd"),
         ("ACCSpeedSetpoint", "ASCMActiveCruiseControlStatus"),
         ("ACCCruiseState", "ASCMActiveCruiseControlStatus"),
       ]
       checks += [
         ("AEBCmd", 10),
+        ("ASCMLKASteeringCmd", 10),
         ("ASCMActiveCruiseControlStatus", 25),
       ]
 

selfdrive/test/process_replay/ref_commit

@@ -1 +1 @@
-d795362593d935767c694c652ecb05ab80dd1914
+baef183c9602b702756e2fd0781b5d289b61d19a