Hyundai longitudinal (CAN): display AEB indicator on non-FCA cars (#29484)

* Hyundai longitudinal (CAN): display AEB indicator on dashboard on non-FCA cars

* clear up comment

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Co-authored-by: Shane Smiskol <shane@smiskol.com>

selfdrive/car/hyundai/hyundaican.py

@@ -148,6 +148,13 @@ def create_acc_commands(packer, enabled, accel, upper_jerk, idx, lead_visible, s
     "aReqValue": accel,  # stock ramps up and down respecting jerk limit until it reaches aReqRaw
     "CR_VSM_Alive": idx % 0xF,
   }
+
+  # show AEB disabled indicator on dash with SCC12 if not sending FCA messages.
+  # these signals also prevent a TCS fault on non-FCA cars with alpha longitudinal
+  if not use_fca:
+    scc12_values["CF_VSM_ConfMode"] = 1
+    scc12_values["AEB_Status"] = 1  # AEB disabled
+
   scc12_dat = packer.make_can_msg("SCC12", 0, scc12_values)[2]
   scc12_values["CR_VSM_ChkSum"] = 0x10 - sum(sum(divmod(i, 16)) for i in scc12_dat) % 0x10