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[87.10.175.32]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e3eb8f305sm27766389f8f.3.2026.10.28.12.44.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 28 Oct 2026 12:44:24 -0700 (PDT) Message-ID: Date: Wed, 28 Oct 2026 20:44:21 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] arm64: dts: imx8qm-ss-conn: add usbotg3 iommu information To: Frank.Li@oss.nxp.com, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Xu Yang , Frank Li , "regressions@lists.linux.dev" , Francesco Dolcini References: <20260720-qm_smmu-v1-0-3689fbd8b516@nxp.com> <20260720-qm_smmu-v1-1-3689fbd8b516@nxp.com> Content-Language: en-US From: Emanuele Ghidoli In-Reply-To: <20260720-qm_smmu-v1-1-3689fbd8b516@nxp.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/20/26 23:10, Frank.Li@oss.nxp.com wrote: > From: Frank Li > > Add usbotg3 iommu information. > > Signed-off-by: Frank Li > --- > arch/arm64/boot/dts/freescale/imx8qm-ss-conn.dtsi | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx8qm-ss-conn.dtsi b/arch/arm64/boot/dts/freescale/imx8qm-ss-conn.dtsi > index ccf9f510e0f88..1370a571153a5 100644 > --- a/arch/arm64/boot/dts/freescale/imx8qm-ss-conn.dtsi > +++ b/arch/arm64/boot/dts/freescale/imx8qm-ss-conn.dtsi > @@ -32,3 +32,7 @@ &usdhc3 { > compatible = "fsl,imx8qm-usdhc", "fsl,imx8qxp-usdhc", "fsl,imx7d-usdhc"; > iommus = <&smmu 0x11 0x7f80>; > }; > + > +&usbotg3_cdns3 { > + iommus = <&smmu 0x4 0x7f80>; > +}; > Hello Frank, this patch, now in mainline as 73c3b40e536d, breaks USB 3.0 on Apalis iMX8QM (both on Ixora and on the Apalis Evaluation Board). Right after xHCI starts: xhci-hcd xhci-hcd.1.auto: Host supports USB 3.0 SuperSpeed xhci-hcd xhci-hcd.1.auto: WARNING: Host System Error ... xhci-hcd xhci-hcd.1.auto: xHCI host controller not responding, assume dead xhci-hcd xhci-hcd.1.auto: HC died; cleaning up SuperSpeed devices no longer enumerate, and no SMMU fault is reported. Reverting only this commit on top of current master fixes it. The other commit seems fine. Adding the same property to the parent as well, like the NXP downstream tree does, also fixes it: &usbotg3 { iommus = <&smmu 0x4 0x7f80>; }; With that, SuperSpeed devices enumerate again. Could you please take care of a fix? Otherwise I think we should revert this patch. #regzbot introduced: 73c3b40e536d Thanks, Emanuele