Re: [PATCH v8 07/10] PCI: dwc: ep: Remove "core_init_notifier" flag

Manivannan Sadhasivam
2024-03-04T06:27:02Z

On Thu, Feb 29, 2024 at 12:23:16PM +0100, Niklas Cassel wrote:
> Hello Mani,
>
> On Sat, Feb 24, 2024 at 12:24:13PM +0530, Manivannan Sadhasivam wrote:
> > "core_init_notifier" flag is set by the glue drivers requiring refclk from
> > the host to complete the DWC core initialization. Also, those drivers will
> > send a notification to the EPF drivers once the initialization is fully
> > completed using the pci_epc_init_notify() API. Only then, the EPF drivers
> > will start functioning.
> >
> > For the rest of the drivers generating refclk locally, EPF drivers will
> > start functioning post binding with them. EPF drivers rely on the
> > 'core_init_notifier' flag to differentiate between the drivers.
> > Unfortunately, this creates two different flows for the EPF drivers.
> >
> > So to avoid that, let's get rid of the "core_init_notifier" flag and follow
> > a single initialization flow for the EPF drivers. This is done by calling
> > the dw_pcie_ep_init_notify() from all glue drivers after the completion of
> > dw_pcie_ep_init_registers() API. This will allow all the glue drivers to
> > send the notification to the EPF drivers once the initialization is fully
> > completed.
> >
> > Only difference here is that, the drivers requiring refclk from host will
> > send the notification once refclk is received, while others will send it
> > during probe time itself.
> >
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> > drivers/pci/controller/dwc/pci-dra7xx.c | 2 ++
> > drivers/pci/controller/dwc/pci-imx6.c | 2 ++
> > drivers/pci/controller/dwc/pci-keystone.c | 2 ++
> > drivers/pci/controller/dwc/pci-layerscape-ep.c | 2 ++
> > drivers/pci/controller/dwc/pcie-designware-plat.c | 2 ++
> > drivers/pci/controller/dwc/pcie-qcom-ep.c | 1 -
> > drivers/pci/controller/dwc/pcie-rcar-gen4.c | 2 ++
> > drivers/pci/controller/dwc/pcie-tegra194.c | 1 -
> > drivers/pci/controller/dwc/pcie-uniphier-ep.c | 2 ++
> > drivers/pci/endpoint/functions/pci-epf-test.c | 18 +++++-------------
> > include/linux/pci-epc.h | 3 ---
>
> pcie-artpec6.c:static const struct dw_pcie_ep_ops pcie_ep_ops = {
> pcie-keembay.c:static const struct dw_pcie_ep_ops keembay_pcie_ep_ops = {
>
> Where is the love for these drivers? ;)
>

Ah, my grep skills got exposed :(

Will fix them.

- Mani

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