ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 464 drivers/gpu/drm/amd/include/amd_acpi.h #define ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 0x4 ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 445 drivers/gpu/drm/radeon/radeon_acpi.h #define ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 0x4