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xhci: Enable RPM on controllers that support low-power states

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Use the low-power states of the underlying platform to enable runtime PM.
If the platform doesn't support runtime D3, then enabling default RPM will
result in the controller malfunctioning, as in the case of hotplug devices
not being detected because of a failed interrupt generation.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20231019102924.2797346-16-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Basavaraj Natikar 2023-10-19 13:29:20 +03:00 committed by Greg Kroah-Hartman
parent 4baf121815
commit a5d6264b63
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/host/xhci-pci.c
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@ -695,7 +695,9 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
/* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */
pm_runtime_put_noidle(&dev->dev);
if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
if (pci_choose_state(dev, PMSG_SUSPEND) == PCI_D0)
pm_runtime_forbid(&dev->dev);
else if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
pm_runtime_allow(&dev->dev);
dma_set_max_seg_size(&dev->dev, UINT_MAX);