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Date: Thu, 27 Apr 2023 08:35:33 +0530
From: Shazad Hussain <quic_shazhuss@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@...aro.org>,
Adrien Thierry <athierry@...hat.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 4/27/2023 5:12 AM, Konrad Dybcio wrote:
>
> 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?
>
In my setup I tried keeping QMPPHY as =y only and did not see the issue
with 10 reboots.
>
> Konrad
>
>>
>> Best,
>>
>> Adrien
>>
---
Shazad
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