Re: [PATCH] arm64: dts: imx8mp-evk: add dual-role usb port1 support

[Andreas Henriksson]

On Fri, Mar 24, 2023 at 10:18:17AM +0000, Jun Li wrote:
> 
> 
> > -----Original Message-----
> > From: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
> > Sent: Thursday, March 23, 2023 6:58 PM
> > To: robh+dt@xxxxxxxxxx; krzysztof.kozlowski+dt@xxxxxxxxxx;
> > shawnguo@xxxxxxxxxx; dl-linux-imx <linux-imx@xxxxxxx>; festevam@xxxxxxxxx
> > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> > kernel@xxxxxxxxxxxxxx
> > Subject: [PATCH] arm64: dts: imx8mp-evk: add dual-role usb port1 support
> > 
> > The i.MX8MP-EVK has a dual-role usb-type-c port marked as PORT1. By this
> > commit the dual-role support is added which allows the user-space to assign
> > usb-gadget functions to it via the configFS.
> 
> So just ignore the orientation switch will make this port cannot work
> at super speed, this is actually why this port is not enabled at upstream.
> I see the orientation switch via GPIO for SBU is already merged:
> drivers/usb/typec/mux/gpio-sbu-mux.c
> Do you have interest to expand this driver to support super speed
> switch for this case? 
[...]

FWIW This is what I ended up with (after backporting the gpio-sbu-mux patches)
a little while ago trying to get the usb-c ports going on imx8mp-evk. I've not
yet had the time to fully test this (only done host/device, not tested: SS,
orientation, etc), so beware that it might be completely wrong.

#include "dt-bindings/usb/pd.h"

&usb3_phy0 {
    vbus-power-supply = <&ptn5110>;
    status = "okay";
};

&usb3_0 {
    status = "okay";
};

&usb_dwc3_0 {
    dr_mode = "otg";
    hnp-disable;
    srp-disable;
    adp-disable;
    usb-role-switch;
    role-switch-default-mode = "peripheral";
    snps,dis-u1-entry-quirk;
    snps,dis-u2-entry-quirk;
    status = "okay";

    port {
        usb3_drd_sw: endpoint {
            remote-endpoint = <&typec_dr_sw>;
        };
    };
};

&i2c2 {
    clock-frequency = <100000>;
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_i2c2>;
    status = "okay";

    ptn5110: tcpc@50 {
        compatible = "nxp,ptn5110";
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_typec>;
        reg = <0x50>;

        interrupt-parent = <&gpio4>;
        interrupts = <19 IRQ_TYPE_LEVEL_LOW>;
        status = "okay";

        port {
            typec_dr_sw: endpoint {
                remote-endpoint = <&usb3_drd_sw>;
            };
        };

        usb_con: connector {
            compatible = "usb-c-connector";
            label = "USB-C";
            power-role = "dual";
            data-role = "dual";
            try-power-role = "sink";
            source-pdos = <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>;
            sink-pdos = <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)
                     PDO_VAR(5000, 20000, 3000)>;
            op-sink-microwatt = <15000000>;
            self-powered;

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

                port@1 {
                    reg = <1>;
                    typec_con_ss: endpoint {
                        remote-endpoint = <&usb3_data_ss>;
                    };
                };
            };
        };
    };

};

&iomuxc {
    pinctrl_typec: typec1grp {
        fsl,pins = <
            MX8MP_IOMUXC_SAI1_TXD7__GPIO4_IO19    0x1c4
        >;
    };

    pinctrl_typec_mux: typec1muxgrp {
        fsl,pins = <
            MX8MP_IOMUXC_SAI1_MCLK__GPIO4_IO20    0x16
            MX8MP_IOMUXC_SD2_WP__GPIO2_IO20        0x16
        >;
    };


    pinctrl_i2c2: i2c2grp {
        fsl,pins = <
            MX8MP_IOMUXC_I2C2_SCL__I2C2_SCL        0x400001c2
            MX8MP_IOMUXC_I2C2_SDA__I2C2_SDA        0x400001c2
        >;
    };
};

/ {
    gpio-sbu-mux {
        compatible = "gpio-sbu-mux";

        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_typec_mux>;
        select-gpios = <&gpio4 20 GPIO_ACTIVE_LOW>; // (PAD_)SAI1_MCLK -> USB1_SS_SEL
        enable-gpios = <&gpio2 20 GPIO_ACTIVE_LOW>; // (PAD_)SD2_WP -> USB1_TYPEC_EN_B -> TYPEC_EN_B

        //mode-switch;
        orientation-switch;

        port {
            usb3_data_ss: endpoint {
                remote-endpoint = <&typec_con_ss>;
            };
        };
    };
};

Hope it might help.

Regards,
Andreas Henriksson