linux-kernel - [PATCH] arm64: dts: qcom: qcm2290: Disable USB SS bus instances in park mode

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Message-Id: <20250708-topic-2290_usb-v1-1-661e70a63339@oss.qualcomm.com>
Date: Tue, 08 Jul 2025 12:28:42 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>, stable@...r.kernel.org, 
 Rob Clark <robin.clark@....qualcomm.com>
Subject: [PATCH] arm64: dts: qcom: qcm2290: Disable USB SS bus instances in
 park mode

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

2290 was found in the field to also require this quirk, as long &
high-bandwidth workloads (e.g. USB ethernet) are consistently able to
crash the controller otherwise.

The same change has been made for a number of SoCs in [1], but QCM2290
somehow escaped the list (even though the very closely related SM6115
was there).

Upon a controller crash, the log would read:

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

Add snps,parkmode-disable-ss-quirk to the DWC3 instance in order to
prevent the aforementioned breakage.

[1] https://lore.kernel.org/all/20240704152848.3380602-1-quic_kriskura@quicinc.com/

Cc: stable@...r.kernel.org
Reported-by: Rob Clark <robin.clark@....qualcomm.com>
Fixes: a64a0192b70c ("arm64: dts: qcom: Add initial QCM2290 device tree")
Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qcm2290.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/qcom/qcm2290.dtsi b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
index fa24b77a31a7504020390522fabb0b783d897366..6b7070dad3df946649660eac1d087c0e8b6fe26d 100644
--- a/arch/arm64/boot/dts/qcom/qcm2290.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
@@ -1454,6 +1454,7 @@ usb_dwc3: usb@...0000 {
 				snps,has-lpm-erratum;
 				snps,hird-threshold = /bits/ 8 <0x10>;
 				snps,usb3_lpm_capable;
+				snps,parkmode-disable-ss-quirk;
 				maximum-speed = "super-speed";
 				dr_mode = "otg";
 				usb-role-switch;

---
base-commit: 26ffb3d6f02cd0935fb9fa3db897767beee1cb2a
change-id: 20250708-topic-2290_usb-6632f12e5cd6

Best regards,
-- 
Konrad Dybcio <konrad.dybcio@....qualcomm.com>