Hello, I'm trying to upstream Designware USB3 host driver present in the Actions Semi S900 SoC. It can successfully detect the USB hub but when any of the USB device got plugged in, it fails with following error: [ 4.365566] usb usb1-port1: connect-debounce failed Full log can be found here: https://pastebin.ubuntu.com/p/PNff5fZkn6/ Below is the output of, lsusb -v: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 3.00 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 3 bMaxPacketSize0 9 idVendor 0x1d6b Linux Foundation idProduct 0x0003 3.0 root hub bcdDevice 5.02 iManufacturer 3 Linux 5.2.0-rc3-00032-gbd970cfc7a82-dirty xhci-hcd iProduct 2 xHCI Host Controller iSerial 1 xhci-hcd.0.auto bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 31 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 0mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 Unused bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0004 1x 4 bytes bInterval 12 bMaxBurst 0 Hub Descriptor: bLength 12 bDescriptorType 42 nNbrPorts 1 wHubCharacteristic 0x000a No power switching (usb 1.0) Per-port overcurrent protection bPwrOn2PwrGood 10 * 2 milli seconds bHubContrCurrent 0 milli Ampere bHubDecLat 0.0 micro seconds wHubDelay 0 nano seconds DeviceRemovable 0x00 Hub Port Status: Port 1: 0000.02a0 5Gbps power Rx.Detect Binary Object Store Descriptor: bLength 5 bDescriptorType 15 wTotalLength 15 bNumDeviceCaps 1 SuperSpeed USB Device Capability: bLength 10 bDescriptorType 16 bDevCapabilityType 3 bmAttributes 0x02 Latency Tolerance Messages (LTM) Supported wSpeedsSupported 0x0008 Device can operate at SuperSpeed (5Gbps) bFunctionalitySupport 3 Lowest fully-functional device speed is SuperSpeed (5Gbps) bU1DevExitLat 0 micro seconds bU2DevExitLat 0 micro seconds Device Status: 0x0001 Self Powered Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Devicetree snippet: usbdrd3_0: usb@e0400000 { compatible = "actions,s900-dwc3"; clocks = <&cmu CLK_USB3_480MPLL0>, <&cmu CLK_USB3_480MPHY0>, <&cmu CLK_USB3_5GPHY>, <&cmu CLK_USB3_CCE>, <&cmu CLK_USB3_MAC>; clock-names = "usb3_480mpll0", "usb3_480mphy0", "usb3_5gphy", "usb3_cce", "usb3_mac"; resets = <&cmu RESET_USB3>; reset-names = "usb3"; power-domains = <&sps S900_PD_USB3>; #address-cells = <2>; #size-cells = <2>; ranges; usbdrd_dwc3_0: dwc3 { compatible = "snps,dwc3"; reg = <0x0 0xe0400000 0x0 0x100000>; interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>; usb-phy = <&usb2_phy>, <&usb3_phy>; dr_mode = "host"; power-domains = <&sps S900_PD_USB3>; snps,hsphy_interface = "utmi"; }; }; After going through the mailing list looking for similar issue, found that some host controllers works with following quirk: snps,dis_u3_susphy_quirk; I tried that also but it didn't work. Can anyone shed some light on this? PS: USB3 is working fine with vendor kernel 3.10. Thanks, Mani
