[PATCH v14.c 4/4] PCI: ACPI: Limit the Intel specific opt-in to D3 to 2024

[Mario Limonciello]

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