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| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-05-16 13:36:24 -0700 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-05-18 15:42:04 -0700 |
| commit | e3567d2c15a7a8e2f992a5f7c7683453ca406d82 (patch) | |
| tree | 2442117f7358e50f49cfecd030a6017d392f474c /drivers/usb/host/xhci-pci.c | |
| parent | 3b3db026414bba1c8f45c49d5eeaefd48d66e1ae (diff) | |
| download | blackbird-op-linux-e3567d2c15a7a8e2f992a5f7c7683453ca406d82.tar.gz blackbird-op-linux-e3567d2c15a7a8e2f992a5f7c7683453ca406d82.zip | |
xhci: Add Intel U1/U2 timeout policy.
All Intel xHCI host controllers support USB 3.0 Link Power Management.
The Panther Point xHCI host controller needs the xHCI driver to
calculate the U1 and U2 timeout values, because it will blindly accept a
MEL that would cause scheduling issues.
The Lynx Point xHCI host controller will reject MEL values that are too
high, but internally it implements the same algorithm that is needed for
Panther Point xHCI.
Simplify the code paths by just having the xHCI driver calculate what
the U1/U2 timeouts should be. Comments on the policy are in the code.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/host/xhci-pci.c')
| -rw-r--r-- | drivers/usb/host/xhci-pci.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 890ba735dee7..18b231b0c5d3 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -84,6 +84,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) /* AMD PLL quirk */ if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info()) xhci->quirks |= XHCI_AMD_PLL_FIX; + if (pdev->vendor == PCI_VENDOR_ID_INTEL) { + xhci->quirks |= XHCI_LPM_SUPPORT; + xhci->quirks |= XHCI_INTEL_HOST; + } if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) { xhci->quirks |= XHCI_SPURIOUS_SUCCESS; |
