Re: [PATCH v6 08/10] PCI: imx6: Use dwc common suspend resume method

Manivannan Sadhasivam
2024-11-22T16:57:19Z

On Fri, Nov 15, 2024 at 12:38:33PM -0500, Frank Li wrote:
> On Fri, Nov 15, 2024 at 12:39:32PM +0530, Manivannan Sadhasivam wrote:
> > On Fri, Nov 01, 2024 at 03:06:08PM +0800, Richard Zhu wrote:
> > > From: Frank Li <Frank.Li@nxp.com>
> > >
> > > Call common dwc suspend/resume function. Use dwc common iATU method to
> > > send out PME_TURN_OFF message. In Old DWC implementations,
> > > PCIE_ATU_INHIBIT_PAYLOAD bit in iATU Ctrl2 register is reserved. So the
> > > generic DWC implementation of sending the PME_Turn_Off message using a
> > > dummy MMIO write cannot be used. Use previouse method to kick off
> > > PME_TURN_OFF MSG for these platforms.
> > >
> > > Replace the imx_pcie_stop_link() and imx_pcie_host_exit() by
> > > dw_pcie_suspend_noirq() in imx_pcie_suspend_noirq().
> > >
> > > Since dw_pcie_suspend_noirq() already does these, see below call stack:
> > > dw_pcie_suspend_noirq()
> > > dw_pcie_stop_link();
> > > imx_pcie_stop_link();
> > > pci->pp.ops->deinit();
> > > imx_pcie_host_exit();
> > >
> > > Replace the imx_pcie_host_init(), dw_pcie_setup_rc() and
> > > imx_pcie_start_link() by dw_pcie_resume_noirq() in
> > > imx_pcie_resume_noirq().
> > >
> > > Since dw_pcie_resume_noirq() already does these, see below call stack:
> > > dw_pcie_resume_noirq()
> > > pci->pp.ops->init();
> > > imx_pcie_host_init();
> > > dw_pcie_setup_rc();
> > > dw_pcie_start_link();
> > > imx_pcie_start_link();
> > >
> >
> > Are these two changes (dw_pcie_suspend_noirq(), dw_pcie_resume_noirq()) related
> > to this patch? If not, these should be in a separate patch.
>
>
> Sorry, this patch have not touch dw_pcie_suspend_noirq() and
> dw_pcie_resume_noirq()'s implement, just call it. I have not understood
> what's your means.
>

Sorry, I got confused. Please ignore above comment.

- Mani

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