From 4ff116d0d5fd8a025604b0802d93a2d5f4e465d1 Mon Sep 17 00:00:00 2001 From: Vidya Sagar Date: Tue, 13 Sep 2022 18:48:22 +0530 Subject: PCI/ASPM: Save L1 PM Substates Capability for suspend/resume Previously the L1 PM Substates Control Registers (CTL1 and CTL2) weren't saved and restored during suspend/resume leading to the L1 PM Substates configuration being lost post-resume. Save the L1 PM Substates Control Registers so that the configuration is retained post-resume. [bhelgaas: drop pci_is_pcie() testing; we can rely on pci_configure_ltr() having already done that] Link: https://lore.kernel.org/r/20220913131822.16557-3-vidyas@nvidia.com Signed-off-by: Vidya Sagar Signed-off-by: Bjorn Helgaas --- drivers/pci/pci.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/pci/pci.h') diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 785f31086313..365a844ec430 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -561,10 +561,14 @@ bool pcie_wait_for_link(struct pci_dev *pdev, bool active); void pcie_aspm_init_link_state(struct pci_dev *pdev); void pcie_aspm_exit_link_state(struct pci_dev *pdev); void pcie_aspm_powersave_config_link(struct pci_dev *pdev); +void pci_save_aspm_l1ss_state(struct pci_dev *dev); +void pci_restore_aspm_l1ss_state(struct pci_dev *dev); #else static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { } static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { } static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { } +static inline void pci_save_aspm_l1ss_state(struct pci_dev *dev) { } +static inline void pci_restore_aspm_l1ss_state(struct pci_dev *dev) { } #endif #ifdef CONFIG_PCIE_ECRC -- cgit v1.2.3