1 files changed, 39 insertions, 0 deletions
diff --git a/src/drivers/apple/hybrid_graphics/acpi/gmux.asl b/src/drivers/apple/hybrid_graphics/acpi/gmux.asl
new file mode 100644
index 0000000000..bf6c8f0e44
--- /dev/null
+++ b/src/drivers/apple/hybrid_graphics/acpi/gmux.asl
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (GMUX)
+{
+    Name (_HID, EisaId ("APP000B"))
+    Name (_CID, "gmux")
+    Name (_STA, 0x0B)
+    Name (_CRS, ResourceTemplate ()
+    {
+	IO (Decode16,
+	    0x0700, // Range Minimum
+	    0x07FF, // Range Maximum
+	    0x01,   // Alignment
+	    0xFF    // Length
+	    )
+    })
+    Name (_PRW, Package (0x02) { 0x16, 0x03 })
+    Scope (\_GPE)
+    {
+	Method (_L16, 0, NotSerialized)
+	{
+	    Notify (\_SB.PCI0.LPCB.GMUX, 0x80)
+	}
+    }
+
+    Name (GMGP, 0x16)
+    Method (GMSP, 1, NotSerialized)
+    {
+	If (Arg0 == 0)
+	{
+	    \GP06 |= Arg0
+	}
+    }
+
+    Method (GMLV, 0, NotSerialized)
+    {
+	Return (\GP06)
+    }
+}