controlsd: no speed increment if enabled on button rising edge (#26490)

* don't increment speed if we enabled on rising edge

* more realistic test
old-commit-hash: e46063086f079eff6292a32ae9aeeafa3aa523a3

selfdrive/controls/lib/drive_helpers.py

@@ -56,7 +56,7 @@ class VCruiseHelper:
         # if stock cruise is completely disabled, then we can use our own set speed logic
         self._update_v_cruise_non_pcm(CS, enabled, is_metric)
         self.v_cruise_cluster_kph = self.v_cruise_kph
-        self.update_button_timers(CS)
+        self.update_button_timers(CS, enabled)
       else:
         self.v_cruise_kph = CS.cruiseState.speed * CV.MS_TO_KPH
         self.v_cruise_cluster_kph = CS.cruiseState.speedCluster * CV.MS_TO_KPH
@@ -97,6 +97,10 @@ class VCruiseHelper:
     if button_type == ButtonType.accelCruise and cruise_standstill:
       return
 
+    # Don't adjust speed if we've enabled since the button was depressed (some ports enable on rising edge)
+    if not self.button_change_states[button_type]["enabled"]:
+      return
+
     v_cruise_delta = v_cruise_delta * (5 if long_press else 1)
     if long_press and self.v_cruise_kph % v_cruise_delta != 0:  # partial interval
       self.v_cruise_kph = CRUISE_NEAREST_FUNC[button_type](self.v_cruise_kph / v_cruise_delta) * v_cruise_delta
@@ -109,7 +113,7 @@ class VCruiseHelper:
 
     self.v_cruise_kph = clip(round(self.v_cruise_kph, 1), V_CRUISE_MIN, V_CRUISE_MAX)
 
-  def update_button_timers(self, CS):
+  def update_button_timers(self, CS, enabled):
     # increment timer for buttons still pressed
     for k in self.button_timers:
       if self.button_timers[k] > 0:
@@ -119,7 +123,7 @@ class VCruiseHelper:
       if b.type.raw in self.button_timers:
         # Start/end timer and store current state on change of button pressed
         self.button_timers[b.type.raw] = 1 if b.pressed else 0
-        self.button_change_states[b.type.raw] = {"standstill": CS.cruiseState.standstill}
+        self.button_change_states[b.type.raw] = {"standstill": CS.cruiseState.standstill, "enabled": enabled}
 
   def initialize_v_cruise(self, CS):
     # initializing is handled by the PCM

selfdrive/controls/tests/test_cruise_speed.py

@@ -74,6 +74,25 @@ class TestVCruiseHelper(unittest.TestCase):
         self.v_cruise_helper.update_v_cruise(CS, enabled=True, is_metric=False)
         self.assertEqual(pressed, self.v_cruise_helper.v_cruise_kph == self.v_cruise_helper.v_cruise_kph_last)
 
+  def test_rising_edge_enable(self):
+    """
+    Some car interfaces may enable on rising edge of a button,
+    ensure we don't adjust speed if enabled changes mid-press.
+    """
+
+    # NOTE: enabled is always one frame behind the result from button press in controlsd
+    for enabled, pressed in ((False, False),
+                             (False, True),
+                             (True, False)):
+      CS = car.CarState(cruiseState={"available": True})
+      CS.buttonEvents = [ButtonEvent(type=ButtonType.decelCruise, pressed=pressed)]
+      self.v_cruise_helper.update_v_cruise(CS, enabled=enabled, is_metric=False)
+      if pressed:
+        self.enable(V_CRUISE_ENABLE_MIN * CV.KPH_TO_MS)
+
+      # Expected diff on enabling. Speed should not change on falling edge of pressed
+      self.assertEqual(not pressed, self.v_cruise_helper.v_cruise_kph == self.v_cruise_helper.v_cruise_kph_last)
+
   def test_resume_in_standstill(self):
     """
     Asserts we don't increment set speed if user presses resume/accel to exit cruise standstill.
@@ -93,7 +112,7 @@ class TestVCruiseHelper(unittest.TestCase):
 
   def test_initialize_v_cruise(self):
     """
-    Asserts allowed cruise speeds on enabling with SET
+    Asserts allowed cruise speeds on enabling with SET.
     """
 
     for v_ego in np.linspace(0, 100, 101):