Hi Peter,
On 10/30/2025 9:34 AM, Peter Chen wrote:
On Wed, Oct 29, 2025 at 6:32 PM Chaoyi Chen <[email protected]> wrote:
On 10/29/2025 6:21 PM, Chaoyi Chen wrote:
Hi Peter,
On 10/29/2025 5:45 PM, Peter Chen wrote:
+&i2c4 {
+ i2c-scl-rising-time-ns = <475>;
+ i2c-scl-falling-time-ns = <26>;
+ status = "okay";
+
+ usbc0: typec-portc@22 {
+ compatible = "fcs,fusb302";
+ reg = <0x22>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <RK_PA2 IRQ_TYPE_LEVEL_LOW>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&usbc0_int>;
+ vbus-supply = <&vbus_typec>;
+
+ usb_con: connector {
+ compatible = "usb-c-connector";
+ label = "USB-C";
+ data-role = "dual";
+ power-role = "dual";
+ try-power-role = "sink";
+ op-sink-microwatt = <1000000>;
+ sink-pdos =
+ <PDO_FIXED(5000, 2500, PDO_FIXED_USB_COMM)>;
+ source-pdos =
+ <PDO_FIXED(5000, 1500, PDO_FIXED_USB_COMM)>;
+
+ altmodes {
+ displayport {
+ svid = /bits/ 16 <0xff01>;
+ vdo = <0x00001c46>;
+ };
+ };
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ usbc_hs: endpoint {
+ remote-endpoint = <&u2phy0_typec_hs>;
+ };
+ };
+
Why USB2 PHY needs to be notified for Type-C connection?
I think the USB-connector binding require a port@0 for High Speed. So I filled
in USB2 PHY here. And I have looked up boards with the same usage, and some of
the results are as follows:
- rk3399-firefly.dts
- rk3399-pinebook-pro.dts
- rk3399-eaidk-610.dts
Okay. My question is basic: USB2 PHY supplies DP/DM, and the DP/DM is
short for Type-C connector,
and no control is needed for Type-C application.
Why is there a remote-endpoint connection between USB2 PHY and Type-C connector?
From the perspective of Type-C, this should not be added. Is the approach in
v2 correct [0] ?
[0]: https://lore.kernel.org/all/[email protected]/
Or is the following approach correct?
port@0 {
reg = <0>;
usbc_hs: endpoint {
remote-endpoint = <&tcphy0>;
};
};
port@1 {
reg = <1>;
usbc_ss: endpoint {
remote-endpoint = <&tcphy0>;
};
};
port@2 {
reg = <2>;
usbc_dp: endpoint {
remote-endpoint = <&tcphy0_typec_dp>;
};
};
+ port@1 {
+ reg = <1>;
+
+ usbc_ss: endpoint {
+ remote-endpoint = <&tcphy0_typec_ss>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ usbc_dp: endpoint {
+ remote-endpoint = <&tcphy0_typec_dp>;
+ };
+ };
+ };
+ };
+ };
+};
+
.....
&u2phy0 {
status = "okay";
+
+ port {
+ u2phy0_typec_hs: endpoint {
+ remote-endpoint = <&usbc_hs>;
+ };
+ };
};
There is no switch and mux, how to co-work with Type-C?
I checked the phy-rockchip-inno-usb2.c but did not find any switch or mux. Does
this mean that we need to implement them? Thank you.
Wait a minute, actually we have multiple hardware interfaces, one of which is
Type-C, eventually connected to USBDPPHY, and the other is micro-usb connected
to U2PHY.
I assume the Micro-USB connector does not use Type-C/PD IC, is it
right? Does it relate to this patch?
Best regards,
Peter
