On 24-12-06 18:24:02, Johan Hovold wrote:
> This reverts commit 1a48dd7b9ac809d1bd0fd2fef509abba83433846.
>
> A recent change enabling OTG mode on the Lenovo ThinkPad T14s USB-C
> ports can break SuperSpeed device hotplugging. The host controller is
> enumerated, but the device is not:
>
> xhci-hcd xhci-hcd.5.auto: xHCI Host Controller
> xhci-hcd xhci-hcd.5.auto: new USB bus registered, assigned bus number 3
> xhci-hcd xhci-hcd.5.auto: hcc params 0x0110ffc5 hci version 0x110 quirks 0x000080a000000810
> xhci-hcd xhci-hcd.5.auto: irq 247, io mem 0x0a800000
> xhci-hcd xhci-hcd.5.auto: xHCI Host Controller
> xhci-hcd xhci-hcd.5.auto: new USB bus registered, assigned bus number 4
> xhci-hcd xhci-hcd.5.auto: Host supports USB 3.1 Enhanced SuperSpeed
> hub 3-0:1.0: USB hub found
> hub 3-0:1.0: 1 port detected
> hub 4-0:1.0: USB hub found
> hub 4-0:1.0: 1 port detected
>
> Once this happens on either of the two ports, no amount of disconnecting
> and reconnecting makes the SuperSpeed device be enumerated, while
> FullSpeed device enumeration still works.
>
> With retimer (and orientation detection) support not even merged yet,
> let's revert at least until we have stable host mode in mainline.
>
> Fixes: 1a48dd7b9ac8 ("arm64: dts: qcom: x1e78100-t14s: enable otg on usb-c ports")
> Cc: Jonathan Marek <jonathan@xxxxxxxx>
> Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Reviewed-by: Abel Vesa <abel.vesa@xxxxxxxxxx>
> ---
>
> I have not been able to reproduce this on the (third port of) the CRD,
> but I hit this constantly with the T14s so let's start with reverting
> there.
>
> Note that Stephan has already identified another problem with the
> offending commit here:
>
> https://lore.kernel.org/all/ZxZO6Prrm2ITUZMQ@xxxxxxxxxx/
>
> Johan
>
>
> #regzbot introduced: 1a48dd7b9ac8
>
>
>
> .../arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
> index 5a4a72a030d4..b4b6260c670c 100644
> --- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
> +++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
> @@ -1515,6 +1515,10 @@ &usb_1_ss0 {
> status = "okay";
> };
>
> +&usb_1_ss0_dwc3 {
> + dr_mode = "host";
> +};
> +
> &usb_1_ss0_dwc3_hs {
> remote-endpoint = <&pmic_glink_ss0_hs_in>;
> };
> @@ -1543,6 +1547,10 @@ &usb_1_ss1 {
> status = "okay";
> };
>
> +&usb_1_ss1_dwc3 {
> + dr_mode = "host";
> +};
> +
> &usb_1_ss1_dwc3_hs {
> remote-endpoint = <&pmic_glink_ss1_hs_in>;
> };
> --
> 2.45.2
>
