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author | Vidya Sagar <vidyas@nvidia.com> | 2022-09-13 18:48:22 +0530 |
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committer | Bjorn Helgaas <bhelgaas@google.com> | 2022-10-04 20:35:40 -0500 |
commit | 4ff116d0d5fd8a025604b0802d93a2d5f4e465d1 (patch) | |
tree | a9578e55a122e03ebec0354dd08f88a5d1abdf3c /drivers/pci/pci.h | |
parent | 5e85eba6f50dc288c22083a7e213152bcc4b8208 (diff) | |
download | linux-4ff116d0d5fd8a025604b0802d93a2d5f4e465d1.tar.gz linux-4ff116d0d5fd8a025604b0802d93a2d5f4e465d1.tar.bz2 linux-4ff116d0d5fd8a025604b0802d93a2d5f4e465d1.zip |
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 <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pci.h')
-rw-r--r-- | drivers/pci/pci.h | 4 |
1 files changed, 4 insertions, 0 deletions
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 |