netdev - Re: Regression: supported_interfaces filling enforcement

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Message-ID: <CABikg9zfGVEJsWf7eq=K5oKQozt86LLn-rzMaVmycekXkQEa8Q@mail.gmail.com>
Date: Mon, 10 Jul 2023 17:35:35 +0300
From: Sergei Antonov <saproj@...il.com>
To: Vladimir Oltean <olteanv@...il.com>
Cc: netdev@...r.kernel.org, rmk+kernel@...linux.org.uk
Subject: Re: Regression: supported_interfaces filling enforcement

On Mon, 10 Jul 2023 at 15:35, Vladimir Oltean <olteanv@...il.com> wrote:
> > +static void mv88e6060_get_caps(struct dsa_switch *ds, int port,
> > +                              struct phylink_config *config)
> > +{
> > +       __set_bit(PHY_INTERFACE_MODE_INTERNAL, config->supported_interfaces);
> > +       __set_bit(PHY_INTERFACE_MODE_GMII, config->supported_interfaces);
>
> This is enough to fix phylink generic validation on the front-facing
> ports with internal PHYs. But it is possible (and encouraged) to use
> phylink on the CPU port too (rev-mii, rev-rmii); currently that's not
> enforced for mv88e6060 because it's in the dsa_switches_apply_workarounds[]
> array.
>
> Could you please modify your device tree to add a fixed-link and
> phy-mode property on your CPU port so that phylink does get used

I already have fixed-link and phy-mode on CPU port. See below.

> , and
> populate supported_interfaces and mac_capabilities properly on the MII
> ports (4 and 5) as well (so that it doesn't fail validation)?

By setting bits in .phylink_get_caps function?

Should I remove mv88e6060 from dsa_switches_apply_workarounds too?

&mdio1 {
        status = "okay";

        #address-cells = <1>;
        #size-cells = <0>;

        switch@10 {
                compatible = "marvell,mv88e6060";
                reg = <0x10>;

                ports {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        port@0 {
                                reg = <0>;
                                label = "lan2";
                        };

                        port@1 {
                                reg = <1>;
                                label = "lan3";
                        };

                        port@2 {
                                reg = <2>;
                                label = "lan1";
                        };

                        port@5 {
                                reg = <5>;
                                label = "cpu";
                                ethernet = <&mac1>;
                                phy-mode = "mii";

                                fixed-link {
                                        speed = <100>;
                                        full-duplex;
                                };
                        };
                };
        };
};