linux-kernel - Re: [PATCH v1 0/6] arm64: qcom: sa8775p: add support for USB

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Date:   Thu, 27 Apr 2023 00:42:15 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Adrien Thierry <athierry@...hat.com>,
        Shazad Hussain <quic_shazhuss@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Wesley Cheng <quic_wcheng@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v1 0/6] arm64: qcom: sa8775p: add support for USB


On 4/24/23 23:35, 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@...8f8800.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@...8f8800.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@...8f8800.usb/a800000.usb/xhci-hcd.1.auto/usb1
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb2 -> ../../../devices/platform/soc@...8f8800.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@...8f8800.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@...8f8800.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@...4f8800.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@...8f8800.usb/a800000.usb/xhci-hcd.0.auto/usb1
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb2 -> ../../../devices/platform/soc@...8f8800.usb/a800000.usb/xhci-hcd.0.auto/usb2
>      lrwxrwxrwx 1 root root 0 Feb 27 00:00 usb3 -> ../../../devices/platform/soc@...4f8800.usb/a400000.usb/xhci-hcd.1.auto/usb3
>
> Have you also encountered this?

I've had some issues with QMPPHY not (sometimes?) probing in time on SM6115 only when built as a module.. perhaps it'd be worth checking out of it works fine with =y?


Konrad

>
> Best,
>
> Adrien
>