On Wed, 2011-09-28 at 01:38 +0800, Rafael J. Wysocki wrote:
> Hi,
>
> On Tuesday, September 27, 2011, Lin Ming wrote:
> > Hi,
> >
> > I have a question about PCIe port runtime power management.
> >
> > 00:1c.0 PCI bridge: Intel Corporation Device 1e10 (rev c0)
> > Capabilities: [a0] Power Management version 2
> > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
> > PME(D0+,D1-,D2-,D3hot+,D3cold+)
> >
> > As above output, this PCIe port supports D3hot/D3cold.
> > But currently, PCIe port driver seems does not support runtime PM.
> >
> > As below, there is no runtime PM callbacks implemented.
> >
> > static const struct dev_pm_ops pcie_portdrv_pm_ops = {
> > .suspend = pcie_port_device_suspend,
> > .resume = pcie_port_device_resume,
> > .freeze = pcie_port_device_suspend,
> > .thaw = pcie_port_device_resume,
> > .poweroff = pcie_port_device_suspend,
> > .restore = pcie_port_device_resume,
> > .resume_noirq = pcie_port_resume_noirq,
> > };
> >
> > Is there some known reason why PCIe port runtime PM was not supported?
> > Or is it just that we have not implemented it yet?
>
> It hasn't been implemented.
Thanks.
BTW, AHCI sata controller runtime PM hasn't been implemented either.
>
> Thanks,
> Rafael
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
