From 6c4717cc39581a62d34cfe87e95372ff0611a5f0 Mon Sep 17 00:00:00 2001
From: firestar5683 <168790843+firestar5683@users.noreply.github.com>
Date: Fri, 29 May 2026 16:07:34 -0500
Subject: [PATCH] g90test

---
 opendbc_repo/opendbc/car/hyundai/tests/test_hyundai.py | 10 ++++++++++
 opendbc_repo/opendbc/car/hyundai/values.py             |  7 ++++---
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/opendbc_repo/opendbc/car/hyundai/tests/test_hyundai.py b/opendbc_repo/opendbc/car/hyundai/tests/test_hyundai.py
index 566cf9fce..2c4fe9b81 100644
--- a/opendbc_repo/opendbc/car/hyundai/tests/test_hyundai.py
+++ b/opendbc_repo/opendbc/car/hyundai/tests/test_hyundai.py
@@ -629,6 +629,16 @@ class TestHyundaiFingerprint:
     ret = update(0, 3)
     assert any(be.type == ButtonType.lkas and not be.pressed for be in ret.buttonEvents)
 
+  def test_genesis_g90_does_not_use_alt_bus_lkas_parser(self):
+    toggles = get_test_toggles()
+    CP = CarInterface.get_params(CAR.GENESIS_G90, gen_empty_fingerprint(), [], False, False, False, toggles)
+    FPCP = CarInterface.get_starpilot_params(CAR.GENESIS_G90, gen_empty_fingerprint(), [], CP, toggles)
+
+    car_state = CarState(CP, FPCP)
+    can_parsers = car_state.get_can_parsers(CP)
+
+    assert Bus.alt not in can_parsers
+
   def test_ioniq_6_longitudinal_params_match_canfd_tune(self):
     toggles = get_test_toggles()
     CP = CarInterface.get_params(CAR.HYUNDAI_IONIQ_6, gen_empty_fingerprint(), [], True, False, False, toggles)
diff --git a/opendbc_repo/opendbc/car/hyundai/values.py b/opendbc_repo/opendbc/car/hyundai/values.py
index 53f8b90ab..f33459511 100644
--- a/opendbc_repo/opendbc/car/hyundai/values.py
+++ b/opendbc_repo/opendbc/car/hyundai/values.py
@@ -927,9 +927,10 @@ CANCEL_BUTTON_ENABLE_CARS = frozenset({
 })
 
 
-ALT_BUS_LDA_BUTTON_CARS = frozenset({
-  CAR.GENESIS_G90,
-})
+# No classic HKG platforms are currently opted into the synthetic alt-bus LKAS
+# button path. The G90 regression is mitigated by falling back to the standard
+# Hyundai LKAS button handling until a route-proven alt-bus implementation is ready.
+ALT_BUS_LDA_BUTTON_CARS = frozenset()
 
 
 def hyundai_cancel_button_enables_cruise(car_fingerprint) -> bool: