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| author |   Bjorn Helgaas <bhelgaas@google.com> | 2018-04-17 11:25:51 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-04-18 16:10:34 -0500 |
| commit | 9ab105deb60fa76d66cae5548819b4e8703d2056 (patch) | |
| tree | 95102cdf7aa3b3922c740b535a1286ef51376c82 /include/linux/pci.h | |
| parent | Linux 4.17-rc1 (diff) | |
| download | linux-dev-9ab105deb60fa76d66cae5548819b4e8703d2056.tar.xz linux-dev-9ab105deb60fa76d66cae5548819b4e8703d2056.zip | |
PCI/ASPM: Disable ASPM L1.2 Substate if we don't have LTR
When in the ASPM L1.0 state (but not the PCI-PM L1.0 state), the most
recent LTR value and the LTR_L1.2_THRESHOLD determines whether the link
enters the L1.2 substate.
If we don't have LTR enabled, prevent the use of ASPM L1.2.
PCI-PM L1.2 may still be used because it doesn't depend on
LTR_L1.2_THRESHOLD (see PCIe r4.0, sec 5.5.1).
Tested-by: Srinath Mannam <srinath.mannam@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/pci.h')
0 files changed, 0 insertions, 0 deletions