Intel systems that need to have PCIe ports in D3 for low power idle
specify this by constraints on the ACPI PNP0D80 device. As this information
is queried by acpi_pci_bridge_d3(), limit the DMI BIOS year check to stop
at 2024. This will allow future systems to rely on the constraints check
and ACPI checks to set up policy like non-Intel systems do.
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
v13->v14:
* Use a variable instead
v12->v13:
* New patch
---
drivers/pci/pci.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index bfdad2eb36d13..c8787d898c377 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3037,16 +3037,22 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge)
return false;
/*
- * Allow Intel PCIe ports from 2015 onward to go into D3 to
+ * Allow Intel PCIe ports from 2015 to 2024 to go into D3 to
* achieve additional energy conservation on some platforms.
*
+ * Intel systems from 2025 onward that need this are expected
+ * to specify this in an LPS0 device constraint instead.
+ *
* This is only set for Intel PCIe ports as it causes problems
* on both AMD Rembrandt and Phoenix platforms where USB keyboards
* can not be used to wake the system from suspend.
*/
- if (bridge->vendor == PCI_VENDOR_ID_INTEL &&
- dmi_get_bios_year() >= 2015)
- return true;
+ if (bridge->vendor == PCI_VENDOR_ID_INTEL) {
+ int year = dmi_get_bios_year();
+
+ if (year >= 2015 && year <= 2024)
+ return true;
+ }
break;
}
--
2.34.1
