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

Shazad Hussain <quic_shazhuss@xxxxxxxxxxx> · Wed, 26 Apr 2023 17:35:40 +0530

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