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,
Rafael
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