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?
