diff options
Diffstat (limited to 'src/soc/amd')
| -rw-r--r-- | src/soc/amd/common/acpi/pci_root.asl | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/soc/amd/common/acpi/pci_root.asl b/src/soc/amd/common/acpi/pci_root.asl new file mode 100644 index 0000000000..46d15b7b8d --- /dev/null +++ b/src/soc/amd/common/acpi/pci_root.asl @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#define ROOT_BRIDGE(acpi_name) \ + Device(acpi_name) { \ + Name(_HID, EISAID("PNP0A08")) /* PCI Express Root Bridge */ \ + Name(_CID, EISAID("PNP0A03")) /* PCI Root Bridge */ \ + Method (_OSC, 4, NotSerialized) { \ + /* Check for proper PCI/PCIe UUID */ \ + If (Arg0 == ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766")) \ + { \ + /* Let OS control everything */ \ + Return(Arg3) \ + } Else { \ + CreateDWordField(Arg3, 0, CDW1) \ + CDW1 = CDW1 | 4 /* Unrecognized UUID, so set bit 2 to 1 */ \ + Return(Arg3) \ + } \ + } \ + } |