Re: [PATCH v2 1/2] arm64: dts: qcom: sc7180: Disable SuperSpeed instances in park mode

[Dmitry Baryshkov]

On Tue, Jun 04, 2024 at 11:36:58AM +0530, Krishna Kurapati wrote:
> On SC7180, in host mode, it is observed that stressing out controller
> results in HC died error:
> 
>  xhci-hcd.12.auto: xHCI host not responding to stop endpoint command
>  xhci-hcd.12.auto: xHCI host controller not responding, assume dead
>  xhci-hcd.12.auto: HC died; cleaning up
> 
> And at this instant only restarting the host mode fixes it. Disable
> SuperSpeed instances in park mode for SC7180 to mitigate this issue.

Let me please repeat the question from v1:

Just out of curiosity, what is the park mode?

> 
> Reported-by: Doug Anderson <dianders@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Fixes: 0b766e7fe5a2 ("arm64: dts: qcom: sc7180: Add USB related nodes")
> Signed-off-by: Krishna Kurapati <quic_kriskura@xxxxxxxxxxx>
> ---
> Removed RB/TB tag from Doug as commit text was updated. 
> 
>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index 2b481e20ae38..cc93b5675d5d 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -3063,6 +3063,7 @@ usb_1_dwc3: usb@a600000 {
>  				iommus = <&apps_smmu 0x540 0>;
>  				snps,dis_u2_susphy_quirk;
>  				snps,dis_enblslpm_quirk;
> +				snps,parkmode-disable-ss-quirk;
>  				phys = <&usb_1_hsphy>, <&usb_1_qmpphy QMP_USB43DP_USB3_PHY>;
>  				phy-names = "usb2-phy", "usb3-phy";
>  				maximum-speed = "super-speed";
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry