Hi, On Mon, Mar 07, 2022 at 08:00:46PM +0530, Sanjay R Mehta wrote: > > > On 3/7/2022 7:05 PM, Mika Westerberg wrote: > > Hi Sanjay, > > > > On Mon, Mar 07, 2022 at 07:05:19AM -0600, Sanjay R Mehta wrote: > >> From: Sanjay R Mehta <sanju.mehta@xxxxxxx> > >> > >> Carry out runtime-resume of PCI tunnelled root port to handle > >> hotplug interrupts synchronously. > > > > What problem does this solve? > > > > Typically the root ports should be able to wake from D3 when the PCIe > > tunnel gets established. Is it not the case here? > > Yes Mika, its not waking from D3 in this case on our hardware. > > Hence I have kept a check to execute this code only if root port still > in D3 after PCIe tunnel is setup. OK, I see. > Do you think should this patch go as a quirk? I think in that case we should prevent the port from entering D3. Does it have the ACPI "HotPlugSupportInD3" property: https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports#identifying-pcie-root-ports-supporting-hot-plug-in-d3 If yes, then simply removing that should work.
