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Message-ID: <f051bfe8-e612-f54e-7729-7816591fa21c@quicinc.com>
Date:   Wed, 26 Apr 2023 17:35:40 +0530
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Subject: Re: [PATCH v1 0/6] arm64: qcom: sa8775p: add support for USB
To:     Adrien Thierry <athierry@redhat.com>
CC:     <agross@kernel.org>, <andersson@kernel.org>, <robh+dt@kernel.org>,
        <krzysztof.kozlowski+dt@linaro.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Vinod Koul <vkoul@kernel.org>,
        "Kishon Vijay Abraham I" <kishon@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Wesley Cheng <quic_wcheng@quicinc.com>,
        <linux-arm-msm@vger.kernel.org>, <linux-phy@lists.infradead.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-usb@vger.kernel.org>
References: <20230421133922.8520-1-quic_shazhuss@quicinc.com>
 <ZEcEGJiikEC2wIVE@fedora>
Content-Language: en-US
From:   Shazad Hussain <quic_shazhuss@quicinc.com>
In-Reply-To: <ZEcEGJiikEC2wIVE@fedora>
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Hi Adrien,

On 4/25/2023 4:05 AM, Adrien Thierry wrote:
> Hi Shazad,
> 
> On Fri, Apr 21, 2023 at 07:09:15PM +0530, Shazad Hussain wrote:
>> Update relavent DT bindings for USB, add new config to the phy driver,
>> add USB and PHY nodes to the .dtsi and enable them in the board .dts
>> for the sa8775p-ride platform.
>>
>> Shazad Hussain (6):
>>    dt-bindings: usb: qcom,dwc3: Add bindings for SA8775P
>>    dt-bindings: phy: qcom,usb-snps-femto-v2: Add bindings for SA8775P
>>    dt-bindings: phy: qcom,sc8280xp-qmp-usb3-uni: Add SA8775P USB PHY
>>      binding
>>    phy: qcom-qmp: Add SA8775P USB3 UNI phy
>>    arm64: dts: qcom: sa8775p: add USB nodes
>>    arm64: dts: qcom: sa8775p-ride: enable USB nodes
>>
>>   .../phy/qcom,sc8280xp-qmp-usb3-uni-phy.yaml   |   1 +
>>   .../bindings/phy/qcom,usb-snps-femto-v2.yaml  |   1 +
>>   .../devicetree/bindings/usb/qcom,dwc3.yaml    |   5 +
>>   arch/arm64/boot/dts/qcom/sa8775p-ride.dts     |  92 +++++++
>>   arch/arm64/boot/dts/qcom/sa8775p.dtsi         | 239 +++++++++++++++++-
>>   drivers/phy/qualcomm/phy-qcom-qmp-usb.c       |  45 ++++
>>   6 files changed, 381 insertions(+), 2 deletions(-)
>>
>> -- 
>> 2.17.1
>>
> 
> Thanks for posting this. I tested the series on the sa8775p, and it seems
> initialization for the controller at a400000 sometimes fails with a
> timeout (-110) error:
> 
>      dwc3 a400000.usb: Adding to iommu group 2
>      xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
>      xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 1
>      xhci-hcd xhci-hcd.0.auto: can't setup: -110
>      xhci-hcd xhci-hcd.0.auto: USB bus 1 deregistered
>      xhci-hcd: probe of xhci-hcd.0.auto failed with error -110
>      dwc3 a600000.usb: Adding to iommu group 3
>      dwc3 a800000.usb: Adding to iommu group 4
>      xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
>      xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 1
>      xhci-hcd xhci-hcd.1.auto: hcc params 0x0110ffc5 hci version 0x110 quirks 0x0000000000010010
>      xhci-hcd xhci-hcd.1.auto: irq 162, io mem 0x0a800000
>      xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
>      xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 2
>      xhci-hcd xhci-hcd.1.auto: Host supports USB 3.1 Enhanced SuperSpeed
>      hub 1-0:1.0: USB hub found
>      hub 1-0:1.0: 1 port detected
>      usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
>      hub 2-0:1.0: USB hub found
>      hub 2-0:1.0: 1 port detected
> 
> In this case, only usb devices for a800000 are showing:
> 
>      dracut:/# ls -alh /sys/bus/usb/devices
>      total 0
>      drwxr-xr-x 2 root root 0 Feb 27 00:00 .
>      drwxr-xr-x 4 root root 0 Feb 27 00:00 ..
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 1-0:1.0 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.1.auto/usb1/1-0:1.0
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 2-0:1.0 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.1.auto/usb2/2-0:1.0
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb1 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.1.auto/usb1
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb2 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.1.auto/usb2
> 
> This happens approximately 1 out of 2 reboots. Here's the kernel output
> when initialization succeeds:
> 
>      dwc3 a600000.usb: Adding to iommu group 2
>      dwc3 a800000.usb: Adding to iommu group 3
>      xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
>      xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 1
>      xhci-hcd xhci-hcd.0.auto: hcc params 0x0110ffc5 hci version 0x110 quirks 0x0000000000010010
>      xhci-hcd xhci-hcd.0.auto: irq 161, io mem 0x0a800000
>      xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
>      xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 2
>      xhci-hcd xhci-hcd.0.auto: Host supports USB 3.1 Enhanced SuperSpeed
>      hub 1-0:1.0: USB hub found
>      hub 1-0:1.0: 1 port detected
>      usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
>      hub 2-0:1.0: USB hub found
>      hub 2-0:1.0: 1 port detected
>      dwc3 a400000.usb: Adding to iommu group 4
>      xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
>      xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 3
>      xhci-hcd xhci-hcd.1.auto: USB3 root hub has no ports
>      xhci-hcd xhci-hcd.1.auto: hcc params 0x0220fe65 hci version 0x110 quirks 0x0000000000010010
>      xhci-hcd xhci-hcd.1.auto: irq 162, io mem 0x0a400000
>      hub 3-0:1.0: USB hub found
>      hub 3-0:1.0: 1 port detected
> 
> And the list of usb devices:
> 
>      dracut:/# ls -alh /sys/bus/usb/devices
>      total 0
>      drwxr-xr-x 2 root root 0 Feb 27 00:00 .
>      drwxr-xr-x 4 root root 0 Feb 27 00:00 ..
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 1-0:1.0 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.0.auto/usb1/1-0:1.0
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 2-0:1.0 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.0.auto/usb2/2-0:1.0
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 3-0:1.0 -> ../../../devices/platform/soc@0/a4f8800.usb/a400000.usb/xhci-hcd.1.auto/usb3/3-0:1.0
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb1 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.0.auto/usb1
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb2 -> ../../../devices/platform/soc@0/a8f8800.usb/a800000.usb/xhci-hcd.0.auto/usb2
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb3 -> ../../../devices/platform/soc@0/a4f8800.usb/a400000.usb/xhci-hcd.1.auto/usb3
> 
> Have you also encountered this?
> 

I did try 10 reboots and did not encounter this issue on my setup tough.

> Best,
> 
> Adrien
> 

---
-Shazad