linux-kernel - [PATCH v2 2/2] arm64: dts: qcom: sc7280: Disable SuperSpeed instances in park mode

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Date: Tue, 4 Jun 2024 11:36:59 +0530
From: Krishna Kurapati <quic_kriskura@...cinc.com>
To: <cros-qcom-dts-watchers@...omium.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Rob Herring <robh@...nel.org>, Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "Conor
 Dooley" <conor+dt@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        "Greg
 Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Matthias Kaehlcke
	<mka@...omium.org>
CC: <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <quic_ppratap@...cinc.com>,
        <quic_jackp@...cinc.com>, Krishna Kurapati <quic_kriskura@...cinc.com>,
        "Doug
 Anderson" <dianders@...gle.com>, <stable@...r.kernel.org>
Subject: [PATCH v2 2/2] arm64: dts: qcom: sc7280: Disable SuperSpeed instances in park mode

On SC7280, 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 SC7280 to mitigate this issue.

Reported-by: Doug Anderson <dianders@...gle.com>
Cc: <stable@...r.kernel.org>
Fixes: bb9efa59c665 ("arm64: dts: qcom: sc7280: Add USB related nodes")
Signed-off-by: Krishna Kurapati <quic_kriskura@...cinc.com>
---
Removed RB/TB tag from Doug as commit text was updated.

 arch/arm64/boot/dts/qcom/sc7280.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index 41f51d326111..e0d3eeb6f639 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -4131,6 +4131,7 @@ usb_1_dwc3: usb@...0000 {
 				iommus = <&apps_smmu 0xe0 0x0>;
 				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