1 files changed, 25 insertions, 0 deletions
diff --git a/src/soc/amd/common/acpi/dptc.asl b/src/soc/amd/common/acpi/dptc.asl
new file mode 100644
index 0000000000..611024cb02
--- /dev/null
+++ b/src/soc/amd/common/acpi/dptc.asl
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+External(\_SB.DDEF, MethodObj)
+External(\_SB.DTAB, MethodObj)
+
+Scope (\_SB)
+{
+    Method (DPTC, 0, Serialized)
+    {
+        /* If _SB.DDEF is not present, DPTC is not enabled so return early. */
+        If (!CondRefOf (\_SB.DDEF))
+        {
+            Return (Zero)
+        }
+
+        If (CondRefOf (\_SB.DTAB) && (\_SB.PCI0.LPCB.EC0.TBMD == One))
+        {
+            \_SB.DTAB()
+            Return (Zero)
+        }
+
+        \_SB.DDEF()
+        Return (Zero)
+    }
+}