diff options
| author | Vidya Sagar <vidyas@nvidia.com> | 2020-10-24 21:04:42 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-11-20 18:17:44 +0100 |
| commit | 4257f7e008ea394fcecc050f1569c3503b8bcc15 (patch) | |
| tree | 08477e23d2d204d8f7b9081f3df3df1e2760891e /drivers/pci/pci.h | |
| parent | Linux 5.10-rc3 (diff) | |
| download | linux-4257f7e008ea394fcecc050f1569c3503b8bcc15.tar.xz linux-4257f7e008ea394fcecc050f1569c3503b8bcc15.zip | |
PCI/ASPM: Save/restore L1SS Capability for suspend/resume
Previously ASPM L1 Substates control registers (CTL1 and CTL2) weren't
saved and restored during suspend/resume leading to L1 Substates
configuration being lost post-resume.
Save the L1 Substates control registers so that the configuration is
retained post-resume.
Link: https://lore.kernel.org/r/20201024190442.871-1-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 f86cae9aa1f4..60308cd1cffc 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -564,11 +564,15 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev); void pcie_aspm_exit_link_state(struct pci_dev *pdev); void pcie_aspm_pm_state_change(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_pm_state_change(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 |