Messages in this thread | | | From | Jun Li <> | Subject | RE: [PATCH] arm64: dts: imx8mp-evk: add dual-role usb port1 support | Date | Mon, 27 Mar 2023 11:48:51 +0000 |
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> -----Original Message----- > From: Andreas Henriksson <andreas@fatal.se> > Sent: Monday, March 27, 2023 4:50 PM > To: Jun Li <jun.li@nxp.com>; Marco Felsch <m.felsch@pengutronix.de> > Cc: robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; > shawnguo@kernel.org; dl-linux-imx <linux-imx@nxp.com>; festevam@gmail.com; > linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org; > kernel@pengutronix.de; Xu Yang <xu.yang_2@nxp.com> > Subject: Re: [PATCH] arm64: dts: imx8mp-evk: add dual-role usb port1 support > > On Fri, Mar 24, 2023 at 10:18:17AM +0000, Jun Li wrote: > > > > > > > -----Original Message----- > > > From: Marco Felsch <m.felsch@pengutronix.de> > > > Sent: Thursday, March 23, 2023 6:58 PM > > > To: robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; > > > shawnguo@kernel.org; dl-linux-imx <linux-imx@nxp.com>; > > > festevam@gmail.com > > > Cc: linux-arm-kernel@lists.infradead.org; > > > linux-kernel@vger.kernel.org; kernel@pengutronix.de > > > 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.
Thanks for the advice.
*reuse* compatible = "gpio-sbu-mux"; can make the basic *function* work, but that's not the right direction, SBU has its own signal in typec connector, here what we need is the Super Speed signal switch, you can see iMX8MP EVK use 2 GPIOs control the SS for 3 states(normal orientation, reserve orientation, places all channels in high impedance state), but SBU will disable both channels at TYPEC_STATE_USB, this is not correct for USB data, so logically we cannot reuse SBU either. But I think this gpio-sbu-mux.c driver can be extended to add support super speed signal orientation.
Li Jun
> > #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
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