On 10/26/2023 12:04, Rafael J. Wysocki wrote:
On Wednesday, October 25, 2023 4:05:42 AM CEST Mario Limonciello wrote:
The policy for whether PCI bridges are allowed to select D3 is dictated
by empirical results that are enumerated into pci_bridge_d3_possible().
In Windows this behaves differently in that Windows internal policy is
not used for devices when a power engine plugin driver provided by the
SOC vendor is installed. This driver is used to decide the policy in
those cases.
This series implements a system that lets drivers register such a policy
control as well. It isn't activated for any SOCs by default.
This is heavily leveraged from the work in [1]
[1] https://lore.kernel.org/platform-driver-x86/20230906184354.45846-1-mario.limonciello@xxxxxxx/
RFC v1->PATCH v1
* Simplify the logic, use pci_d3cold_enable()/pci_d3cold_disable() functions
* Roll https://lore.kernel.org/linux-pci/20231004144731.158342-1-mario.limonciello@xxxxxxx/ into series
* Updates for some typos
* Re-order series. Patches 1 and 2 can potentially apply to PCI tree, 3 and 4 to platform-x86 tree.
Mario Limonciello (4):
PCI: Make d3cold_allowed sysfs attribute read only
PCI: Refresh root ports in pci_bridge_d3_update()
ACPI: x86: s2idle: Export symbol for fetching constraints for module
use
platform/x86/amd: pmc: Add support for using constraints to decide D3
policy
Documentation/ABI/testing/sysfs-bus-pci | 4 +-
drivers/acpi/x86/s2idle.c | 1 +
drivers/pci/pci-acpi.c | 2 +-
drivers/pci/pci-sysfs.c | 14 +-----
drivers/pci/pci.c | 12 ++++--
drivers/platform/x86/amd/pmc/pmc.c | 57 +++++++++++++++++++++++++
include/linux/pci.h | 1 -
7 files changed, 72 insertions(+), 19 deletions(-)
Any chance to CC this series to linux-pm and linux-acpi?
Sure if it needs to spin again I'll send it to those lists as well.
Here's a lore link for you for now though if you want to respond to the
other patches.
https://lore.kernel.org/platform-driver-x86/0cd6648d-21f1-445d-95f6-20f580bbcfd1@xxxxxxx/T/
