linux-kernel - Re: [PATCH RESEND v4 07/15] PCI: tegra194: Drop manual DW PCIe controller version setup

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Message-ID: <20220627223141.qzi4unrloj23v5jt@mobilestation>
Date:   Tue, 28 Jun 2022 01:31:41 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Frank Li <Frank.Li@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH RESEND v4 07/15] PCI: tegra194: Drop manual DW PCIe
 controller version setup

On Mon, Jun 27, 2022 at 01:29:33PM +0530, Vidya Sagar wrote:
> 
> 
> On 6/24/2022 8:09 PM, Serge Semin wrote:
> > External email: Use caution opening links or attachments
> > 
> > 
> > Since the DW PCIe common code now supports the IP-core version
> > auto-detection there is no point in manually setting the version up for the
> > controllers newer than v4.70a. Seeing Tegra 194 PCIe Host and EP
> > controllers are based on the DW PCIe v4.90a IP-core we can freely drop the
> > dw_pcie.version field initialization.
> > 
> > Suggested-by: Rob Herring <robh@...nel.org>
> > Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> > 
> > ---
> > 
> > Folks, I don't have Tegra 194 PCIe hw instance to test it out. Could you
> > please make sure this patch doesn't brake anything?
> 

> Hi,
> I tried to apply the series
> https://patchwork.kernel.org/project/linux-pci/list/?series=653624 on top of
> linux-next and ran into conflicts. Could you please tell me the minimum set
> of patches to be taken?

Hi.
As the cover letter says it is supposed to be applied on top of the
next series *:
https://lore.kernel.org/linux-pci/20220624143428.8334-1-Sergey.Semin@baikalelectronics.ru/
* Currently latest patchset version is v5.

Then - the resent series what you are referring to.

-Sergey

> 
> Thanks,
> Vidya Sagar
> 
> > 
> > Changelog v3:
> > - This is a new patch create as a result of the discussion:
> >    https://lore.kernel.org/linux-pci/20220503214638.1895-6-Sergey.Semin@baikalelectronics.ru/
> > ---
> >   drivers/pci/controller/dwc/pcie-tegra194.c | 1 -
> >   1 file changed, 1 deletion(-)
> > 
> > diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
> > index f24b30b7454f..e497e6de8d15 100644
> > --- a/drivers/pci/controller/dwc/pcie-tegra194.c
> > +++ b/drivers/pci/controller/dwc/pcie-tegra194.c
> > @@ -1979,7 +1979,6 @@ static int tegra194_pcie_probe(struct platform_device *pdev)
> >          pci->ops = &tegra_dw_pcie_ops;
> >          pci->n_fts[0] = N_FTS_VAL;
> >          pci->n_fts[1] = FTS_VAL;
> > -       pci->version = DW_PCIE_VER_490A;
> > 
> >          pp = &pci->pp;
> >          pp->num_vectors = MAX_MSI_IRQS;
> > --
> > 2.35.1
> >