diff options
| -rw-r--r-- | src/soc/intel/common/block/pcie/rtd3/rtd3.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/src/soc/intel/common/block/pcie/rtd3/rtd3.c b/src/soc/intel/common/block/pcie/rtd3/rtd3.c index f99ae44650..7a64734b6e 100644 --- a/src/soc/intel/common/block/pcie/rtd3/rtd3.c +++ b/src/soc/intel/common/block/pcie/rtd3/rtd3.c @@ -143,10 +143,30 @@ static void pcie_rtd3_acpi_method_srck(unsigned int pcie_rp, static void pcie_rtd3_acpi_method_on(unsigned int pcie_rp, const struct soc_intel_common_block_pcie_rtd3_config *config, - enum pcie_rp_type rp_type) + enum pcie_rp_type rp_type, + const struct device *dev) { + const struct device *parent = dev->bus->dev; + acpigen_write_method_serialized("_ON", 0); + /* The _STA returns current power status of device, so we can skip _ON + * if _STA returns 1 + * Example: + * Local0 = \_SB.PCI0.RP01.RTD3._STA () + * If ((Local0 == One)) + * { + * Return (One) + * } + */ + acpigen_write_store(); + acpigen_emit_namestring(acpi_device_path_join(parent, "RTD3._STA")); + acpigen_emit_byte(LOCAL0_OP); + acpigen_write_if_lequal_op_int(LOCAL0_OP, ONE_OP); + acpigen_write_return_op(ONE_OP); + acpigen_write_if_end(); + + /* When this feature is enabled, ONSK indicates if the previous _OFF was * skipped. If so, since the device was not in Off state, and the current * _ON can be skipped as well. @@ -448,7 +468,7 @@ static void pcie_rtd3_acpi_fill_ssdt(const struct device *dev) } pcie_rtd3_acpi_method_status(config); - pcie_rtd3_acpi_method_on(pcie_rp, config, rp_type); + pcie_rtd3_acpi_method_on(pcie_rp, config, rp_type, dev); pcie_rtd3_acpi_method_off(pcie_rp, config, rp_type); acpigen_pop_len(); /* PowerResource */ |