soc/intel/tigerlake/apci: Only use SCM for ChromeOS

Software Connection Manager doesn't work with Linux 5.13 or later and results in TBT ports timing out. Not advertising this results in Firmware Connection Manager being used and TBT works correctly. Signed-off-by: Sean Rhodes <[email protected]> Change-Id: Ib947c3c9cd843e54d4664509c15336178c0bc99e
system76 · Nov 8, 2021 · 825aae5 · 825aae5
1 parent 21246f5
commit 825aae5
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/soc/intel/tigerlake/acpi/tcss.asl b/src/soc/intel/tigerlake/acpi/tcss.asl
@@ -154,6 +154,12 @@ Scope (\_SB)
 				CDW1 |= UNRECOGNIZED_REVISION
 			}
 			Return (Arg3)
+#if CONFIG(CHROMEOS)
+		/*
+                 * Software Connection Manager doesn't work with Linux 5.13 or later and
+		 * results in TBT ports timing out. Not advertising this results in
+		 * Firmware Connection Manager being used and TBT works correctly.
+                 */
 		} ElseIf (Arg0 == ToUUID("23A0D13A-26AB-486C-9C5F-0FFA525A575A")) {
 			/*
 			 * Operating System Capabilities for USB4
@@ -185,6 +191,7 @@ Scope (\_SB)
 				INTER_DOMAIN_USB4_INTERNET_PROTOCOL
 			CDW3 = Local0
 			Return (Arg3)
+#endif
 		} Else {
 			CDW1 |= UNRECOGNIZED_UUID
 			Return (Arg3)