USB3.0 disconnect periodic on i.mx8mq

[wenfu]

Hardware: i.mx8mq

Software: linux 4.14.78

We connect a USB3.0 device but see this in kernel logs.

ernel: [ 9.641486] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
kernel: [ 170.699159] random: crng init done
kernel: [ 170.702630] random: 7 urandom warning(s) missed due to ratelimiting
kernel: [ 257.499218] usb 1-1: new high-speed USB device number 2 using xhci-hcd
kernel: [ 264.256682] usb 1-1: USB disconnect, device number 2
kernel: [ 264.662677] usb 1-1: new high-speed USB device number 3 using xhci-hcd
kernel: [ 295.271297] usb 1-1: USB disconnect, device number 3
kernel: [ 316.459202] usb 1-1: new high-speed USB device number 4 using xhci-hcd
kernel: [ 337.063656] usb 1-1: USB disconnect, device number 4
kernel: [ 337.447212] usb 1-1: new high-speed USB device number 5 using xhci-hcd
kernel: [ 339.886867] usb 1-1: USB disconnect, device number 5
kernel: [ 340.239200] usb 1-1: new high-speed USB device number 6 using xhci-hcd
kernel: [ 346.466165] usb 1-1: USB disconnect, device number 6
kernel: [ 351.131209] usb 1-1: new high-speed USB device number 7 using xhci-hcd
kernel: [ 357.310203] usb 1-1: USB disconnect, device number 7
kernel: [ 357.663205] usb 1-1: new high-speed USB device number 8 using xhci-hcd
kernel: [ 476.516573] usb 1-1: USB disconnect, device number 8
kernel: [ 476.919201] usb 1-1: new high-speed USB device number 9 using xhci-hcd
kernel: [ 533.111477] usb 1-1: USB disconnect, device number 9
kernel: [ 533.427208] usb 1-1: new high-speed USB device number 10 using xhci-hcd
kernel: [ 691.615466] fec 30be0000.ethernet eth0: Link is Down
kernel: [ 693.664569] fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
kernel: [ 7073.387881] usb 1-1: USB disconnect, device number 10
kernel: [ 7090.407200] usb 1-1: new high-speed USB device number 11 using xhci-hcd
kernel: [ 7096.574821] usb 1-1: USB disconnect, device number 11
kernel: [ 7097.143209] usb 1-1: new high-speed USB device number 12 using xhci-hcd
kernel: [ 7100.473479] usb 1-1: USB disconnect, device number 12
kernel: [ 7101.043194] usb 1-1: new high-speed USB device number 13 using xhci-hcd
kernel: [ 7101.981706] usb 1-1: USB disconnect, device number 13
kernel: [ 7102.511212] usb 1-1: new high-speed USB device number 14 using xhci-hcd
kernel: [11002.629922] usb 1-1: USB disconnect, device number 14
kernel: [11008.724654] usb 1-1: new high-speed USB device number 15 using xhci-hcd
kernel: [11209.819038] usb 1-1: USB disconnect, device number 15
kernel: [12612.914884] usb 1-1: new high-speed USB device number 16 using xhci-hcd
kernel: [12621.136986] usb 1-1: USB disconnect, device number 16
kernel: [12621.570908] usb 1-1: new high-speed USB device number 17 using xhci-hcd
kernel: [12623.102460] usb 1-1: USB disconnect, device number 17
kernel: [12623.510918] usb 1-1: new high-speed USB device number 18 using xhci-hcd
kernel: [20890.083286] usb 1-1: USB disconnect, device number 18
kernel: [20893.170309] usb 1-1: new high-speed USB device number 19 using xhci-hcd
kernel: [20922.935939] usb 1-1: USB disconnect, device number 19
kernel: [21140.670570] usb 1-1: new high-speed USB device number 20 using xhci-hcd
kernel: [21333.344087] usb 1-1: USB disconnect, device number 20
kernel: [21347.270068] usb 1-1: new high-speed USB device number 21 using xhci-hcd
kernel: [21351.767454] usb 1-1: USB disconnect, device number 21
kernel: [21373.714508] usb 1-1: new high-speed USB device number 22 using xhci-hcd
kernel: [21382.244658] usb 1-1: USB disconnect, device number 22
kernel: [21382.594674] usb 1-1: new high-speed USB device number 23 using xhci-hcd
kernel: [21383.865633] usb 1-1: USB disconnect, device number 23
kernel: [21384.214672] usb 1-1: new high-speed USB device number 24 using xhci-hcd
kernel: [21451.004141] usb 1-1: USB disconnect, device number 24
kernel: [21513.204871] usb 1-1: new high-speed USB device number 25 using xhci-hcd
kernel: [21542.594269] usb 1-1: USB disconnect, device number 25
kernel: [21565.697746] usb 1-1: new high-speed USB device number 26 using xhci-hcd
kernel: [21565.857055] usb-storage 1-1:1.1: USB Mass Storage device detected
kernel: [21565.865918] scsi host0: usb-storage 1-1:1.1
kernel: [21566.878836] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0310 PQ: 0 ANSI: 2
kernel: [21600.529409] usb 1-1: USB disconnect, device number 26
kernel: [21600.966353] usb 1-1: new high-speed USB device number 27 using xhci-hcd
kernel: [21601.133114] usb-storage 1-1:1.1: USB Mass Storage device detected
kernel: [21601.140141] scsi host0: usb-storage 1-1:1.1
kernel: [21602.175597] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0310 PQ: 0 ANSI: 2
kernel: [21696.615920] usb 1-1: USB disconnect, device number 27
kernel: [21738.236591] usb 1-1: new high-speed USB device number 28 using xhci-hcd
kernel: [21738.397015] hub 1-1:1.0: USB hub found
kernel: [21738.400844] hub 1-1:1.0: 4 ports detected
kernel: [21738.516756] usb 2-1: new SuperSpeed USB device number 2 using xhci-hcd
kernel: [21738.588974] hub 2-1:1.0: USB hub found
kernel: [21738.592910] hub 2-1:1.0: 4 ports detected
kernel: [21759.536999] usb 1-1.4: new high-speed USB device number 29 using xhci-hcd
kernel: [21788.892833] usb 1-1.4: USB disconnect, device number 29
kernel: [21793.457570] usb 1-1.4: new high-speed USB device number 30 using xhci-hcd
kernel: [21809.628836] usb 1-1.4: USB disconnect, device number 30
kernel: [21813.485944] usb 1-1: USB disconnect, device number 28
kernel: [21813.541440] usb 2-1: USB disconnect, device number 2
kernel: [21822.830072] usb 1-1: new high-speed USB device number 31 using xhci-hcd
kernel: [21853.018587] usb 1-1: USB disconnect, device number 31
kernel: [21856.862647] usb 2-1: new SuperSpeed USB device number 3 using xhci-hcd
kernel: [21856.924960] hub 2-1:1.0: USB hub found
kernel: [21856.928915] hub 2-1:1.0: 4 ports detected
kernel: [21857.014631] usb 1-1: new high-speed USB device number 32 using xhci-hcd
kernel: [21857.181014] hub 1-1:1.0: USB hub found
kernel: [21857.184838] hub 1-1:1.0: 4 ports detected
kernel: [21867.034794] usb 1-1.4: new high-speed USB device number 33 using xhci-hcd
kernel: [21899.629193] usb 1-1: USB disconnect, device number 32
kernel: [21899.634359] usb 1-1.4: USB disconnect, device number 33
kernel: [21899.795377] usb 2-1: USB disconnect, device number 3
kernel: [21908.343523] usb 2-1: new SuperSpeed USB device number 4 using xhci-hcd
kernel: [21908.412982] hub 2-1:1.0: USB hub found
kernel: [21908.416919] hub 2-1:1.0: 4 ports detected
kernel: [21908.495506] usb 1-1: new high-speed USB device number 34 using xhci-hcd
kernel: [21908.669000] hub 1-1:1.0: USB hub found
kernel: [21908.672846] hub 1-1:1.0: 4 ports detected
kernel: [21909.231510] usb 1-1.4: new high-speed USB device number 35 using xhci-hcd
kernel: [21909.327734] usb 1-1: USB disconnect, device number 34
kernel: [21909.340126] usb 1-1.4: device descriptor read/all, error -71
kernel: [21909.345958] usb 1-1-port4: attempt power cycle
kernel: [21909.455546] usb 2-1: USB disconnect, device number 4
kernel: [21913.499606] usb 2-1: new SuperSpeed USB device number 5 using xhci-hcd
kernel: [21913.564976] hub 2-1:1.0: USB hub found
kernel: [21913.568917] hub 2-1:1.0: 4 ports detected
kernel: [21913.659583] usb 1-1: new high-speed USB device number 39 using xhci-hcd
kernel: [21913.791555] usb 1-1: Device not responding to setup address.
kernel: [21913.887548] usb 2-1: USB disconnect, device number 5
kernel: [21914.003620] usb 1-1: Device not responding to setup address.
kernel: [21914.214994] usb 1-1: device not accepting address 39, error -71
kernel: [21914.347557] usb 2-1: new SuperSpeed USB device number 6 using xhci-hcd
kernel: [21914.412983] hub 2-1:1.0: USB hub found
kernel: [21914.416919] hub 2-1:1.0: 4 ports detected
kernel: [21914.707609] usb 1-1: new high-speed USB device number 40 using xhci-hcd
kernel: [21914.877018] hub 1-1:1.0: USB hub found
kernel: [21914.880847] hub 1-1:1.0: 4 ports detected
kernel: [21942.756018] usb 1-1.4: new high-speed USB device number 41 using xhci-hcd
kernel: [21942.935785] cdc_acm 1-1.4:1.1: ttyACM0: USB ACM device
kernel: [21942.942378] usbcore: registered new interface driver cdc_acm
kernel: [21942.948138] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
kernel: [21949.148367] usb 1-1.4: USB disconnect, device number 41
kernel: [21949.154363] cdc_acm 1-1.4:1.1: failed to set dtr/rts
kernel: [21950.764207] usb 1-1.4: new high-speed USB device number 42 using xhci-hcd
kernel: [21950.930352] cdc_acm 1-1.4:1.1: ttyACM0: USB ACM device
kernel: [21985.244845] usb 1-1.4: USB disconnect, device number 42
kernel: [21989.840891] usb 1-1: USB disconnect, device number 40
kernel: [21989.872911] usb 2-1: USB disconnect, device number 6
kernel: [21993.320912] usb 1-1: new high-speed USB device number 43 using xhci-hcd
kernel: [21993.521922] cdc_acm 1-1:1.1: ttyACM0: USB ACM device
kernel: [22123.428684] usb 1-1: USB disconnect, device number 43
kernel: [22129.698729] usb 2-1: new SuperSpeed USB device number 7 using xhci-hcd
kernel: [22129.772979] hub 2-1:1.0: USB hub found
kernel: [22129.776926] hub 2-1:1.0: 4 ports detected
kernel: [22129.851196] usb 1-1: new high-speed USB device number 44 using xhci-hcd
kernel: [22130.013005] hub 1-1:1.0: USB hub found
kernel: [22130.016835] hub 1-1:1.0: 4 ports detected
kernel: [22134.963268] usb 1-1.4: new high-speed USB device number 45 using xhci-hcd
kernel: [22135.119720] cdc_acm 1-1.4:1.1: ttyACM0: USB ACM device
kernel: [22346.204863] usb 1-1.4: USB disconnect, device number 45
kernel: [22347.546831] usb 1-1.4: new high-speed USB device number 46 using xhci-hcd
kernel: [22347.693973] cdc_acm 1-1.4:1.1: ttyACM0: USB ACM device
kernel: [22348.252874] usb 1-1.4: USB disconnect, device number 46
kernel: [22356.290970] usb 1-1.4: new high-speed USB device number 47 using xhci-hcd
kernel: [22423.772853] usb 1-1.4: USB disconnect, device number 47
kernel: [22443.928434] usb 1-1.4: new high-speed USB device number 48 using xhci-hcd
kernel: [22444.061673] usb-storage 1-1.4:1.1: USB Mass Storage device detected
kernel: [22444.069278] scsi host0: usb-storage 1-1.4:1.1
kernel: [22445.101020] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0310 PQ: 0 ANSI: 2
kernel: [22445.532854] usb 1-1.4: USB disconnect, device number 48
kernel: [22451.200502] usb 1-1.4: new high-speed USB device number 49 using xhci-hcd
kernel: [22453.468857] usb 1-1.4: USB disconnect, device number 49
kernel: [22459.148721] usb 2-1: USB disconnect, device number 7
kernel: [22459.154255] usb 1-1: USB disconnect, device number 44
kernel: [22465.628804] usb 1-1: new high-speed USB device number 50 using xhci-hcd
kernel: [22499.559398] usb 1-1: USB disconnect, device number 50
kernel: [22503.869438] usb 1-1: new high-speed USB device number 51 using xhci-hcd
kernel: [22547.683359] usb 1-1: USB disconnect, device number 51
kernel: [22556.830324] usb 1-1: new high-speed USB device number 52 using xhci-hcd
kernel: [22556.991124] usb-storage 1-1:1.1: USB Mass Storage device detected
kernel: [22556.998911] scsi host0: usb-storage 1-1:1.1
kernel: [22558.031906] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0310 PQ: 0 ANSI: 2
kernel: [22688.753033] usb 1-1: USB disconnect, device number 52
kernel: [22695.692278] usb 1-1: new high-speed USB device number 53 using xhci-hcd
kernel: [22722.114957] usb 1-1: USB disconnect, device number 53
kernel: [22722.469072] usb 1-1: new high-speed USB device number 54 using xhci-hcd
kernel: [22900.960267] usb 1-1: USB disconnect, device number 54
kernel: [22904.191018] usb 1-1: new high-speed USB device number 55 using xhci-hcd
kernel: [22904.349042] hub 1-1:1.0: USB hub found
kernel: [22904.352870] hub 1-1:1.0: 4 ports detected
kernel: [22904.474533] usb 2-1: new SuperSpeed USB device number 8 using xhci-hcd
kernel: [22904.540995] hub 2-1:1.0: USB hub found
kernel: [22904.544956] hub 2-1:1.0: 4 ports detected
kernel: [22911.183077] usb 1-1.4: new high-speed USB device number 56 using xhci-hcd
kernel: [22911.723127] usb 1-1.4: device no response, device descriptor read/64, error -71
kernel: [22952.156818] usb 1-1.4: USB disconnect, device number 56
kernel: [22956.087545] usb 1-1.4: new high-speed USB device number 57 using xhci-hcd
kernel: [22956.223319] usb-storage 1-1.4:1.1: USB Mass Storage device detected
kernel: [22956.231223] scsi host0: usb-storage 1-1.4:1.1
kernel: [22957.267551] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0310 PQ: 0 ANSI: 2
kernel: [22992.348301] usb 1-1.4: USB disconnect, device number 57
kernel: [22996.671372] usb 1-1.4: new high-speed USB device number 58 using xhci-hcd
kernel: [22996.798036] usb-storage 1-1.4:1.1: USB Mass Storage device detected
kernel: [22996.805141] scsi host0: usb-storage 1-1.4:1.1
kernel: [22997.813674] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0404 PQ: 0 ANSI: 2
kernel: [23070.875865] usb 1-1: USB disconnect, device number 55
kernel: [23070.880972] usb 1-1.4: USB disconnect, device number 58
kernel: [23071.056756] usb 2-1: USB disconnect, device number 8
kernel: [23077.708856] usb 1-1: new high-speed USB device number 59 using xhci-hcd
kernel: [23077.872080] usb-storage 1-1:1.1: USB Mass Storage device detected
kernel: [23077.878914] scsi host0: usb-storage 1-1:1.1
kernel: [23078.901524] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0404 PQ: 0 ANSI: 2
kernel: [23149.057864] usb 1-1: USB disconnect, device number 59
kernel: [23151.689234] usb 1-1: new high-speed USB device number 60 using xhci-hcd
kernel: [23151.869049] hub 1-1:1.0: USB hub found
kernel: [23151.872875] hub 1-1:1.0: 4 ports detected
kernel: [23151.969763] usb 2-1: new SuperSpeed USB device number 9 using xhci-hcd
kernel: [23152.029086] hub 2-1:1.0: USB hub found
kernel: [23152.032996] hub 2-1:1.0: 4 ports detected
kernel: [23155.833755] usb 1-1.4: new high-speed USB device number 61 using xhci-hcd
kernel: [23155.968453] usb-storage 1-1.4:1.1: USB Mass Storage device detected
kernel: [23155.976237] scsi host0: usb-storage 1-1.4:1.1
kernel: [23156.983844] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0404 PQ: 0 ANSI: 2
kernel: [23183.068385] usb 1-1.4: USB disconnect, device number 61
kernel: [23184.794126] usb 1-1.4: new high-speed USB device number 62 using xhci-hcd
kernel: [23184.925210] usb-storage 1-1.4:1.1: USB Mass Storage device detected
kernel: [23184.937158] scsi host0: usb-storage 1-1.4:1.1
kernel: [23185.975275] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0404 PQ: 0 ANSI: 2
kernel: [23220.188884] usb 1-1.4: USB disconnect, device number 62
kernel: [23447.613525] usb 1-1.4: new high-speed USB device number 63 using xhci-hcd
kernel: [23531.484329] usb 1-1.4: USB disconnect, device number 63
kernel: [23551.830965] usb 1-1.4: new high-speed USB device number 64 using xhci-hcd
kernel: [23565.532907] usb 1-1.4: USB disconnect, device number 64
kernel: [23565.787152] usb 1-1.4: new high-speed USB device number 65 using xhci-hcd
kernel: [23601.372911] usb 1-1.4: USB disconnect, device number 65
kernel: [23601.631659] usb 1-1.4: new high-speed USB device number 66 using xhci-hcd
kernel: [23715.548911] usb 1-1.4: USB disconnect, device number 66
kernel: [23855.935329] usb 1-1.4: new high-speed USB device number 67 using xhci-hcd
kernel: [23856.061180] usb-storage 1-1.4:1.1: USB Mass Storage device detected
kernel: [23856.068699] scsi host0: usb-storage 1-1.4:1.1
kernel: [23857.092051] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0401 PQ: 0 ANSI: 2
kernel: [23982.044912] usb 1-1.4: USB disconnect, device number 67
kernel: [23984.133279] usb 2-1: USB disconnect, device number 9
kernel: [23984.160731] usb 1-1: USB disconnect, device number 60
kernel: [23988.233295] usb 1-1: new high-speed USB device number 68 using xhci-hcd
kernel: [23988.399970] usb-storage 1-1:1.1: USB Mass Storage device detected
kernel: [23988.406806] scsi host0: usb-storage 1-1:1.1
kernel: [23989.443208] scsi 0:0:0:0: CD-ROM Linux File-CD Gadget 0401 PQ: 0 ANSI: 2
kernel: [24056.608917] usb 1-1: USB disconnect, device number 68
kernel: [24157.663840] usb 1-1: new high-speed USB device number 69 using xhci-hcd
kernel: [24162.588295] usb 1-1: USB disconnect, device number 69
kernel: [24177.120141] usb 1-1: new high-speed USB device number 70 using xhci-hcd
kernel: [24331.232944] usb 1-1: USB disconnect, device number 70
kernel: [24353.258845] usb 1-1: new high-speed USB device number 71 using xhci-hcd
kernel: [24355.015637] usb 1-1: USB disconnect, device number 71
kernel: [24361.890980] usb 2-1: new SuperSpeed USB device number 10 using xhci-hcd
kernel: [24361.964553] hub 2-1:1.0: USB hub found
kernel: [24361.968515] hub 2-1:1.0: 4 ports detected
kernel: [24362.042965] usb 1-1: new high-speed USB device number 72 using xhci-hcd
kernel: [24362.205158] hub 1-1:1.0: USB hub found
kernel: [24362.208991] hub 1-1:1.0: 4 ports detected
kernel: [24364.902500] usb 2-1: USB disconnect, device number 10
kernel: [24364.908231] usb 1-1: USB disconnect, device number 72
kernel: [24385.259320] usb 1-1: new high-speed USB device number 73 using xhci-hcd
kernel: [24393.799625] usb 1-1: USB disconnect, device number 73
kernel: [24394.151471] usb 1-1: new high-speed USB device number 74 using xhci-hcd
kernel: [24403.044723] usb 1-1: USB disconnect, device number 74
kernel: [24403.391591] usb 1-1: new high-speed USB device number 75 using xhci-hcd
kernel: [24404.192890] usb 1-1: USB disconnect, device number 75
kernel: [24404.579636] usb 1-1: new high-speed USB device number 76 using xhci-hcd
kernel: [24430.126183] usb 1-1: USB disconnect, device number 76
kernel: [24468.088596] usb 1-1: new high-speed USB device number 77 using xhci-hcd
kernel: [24468.253189] hub 1-1:1.0: USB hub found
kernel: [24468.257033] hub 1-1:1.0: 4 ports detected
kernel: [24468.368643] usb 2-1: new SuperSpeed USB device number 11 using xhci-hcd
kernel: [24468.445077] hub 2-1:1.0: USB hub found
kernel: [24468.449018] hub 2-1:1.0: 4 ports detected
kernel: [24472.557184] usb 2-1: Disable of device-initiated U1 failed.
kernel: [24472.562861] usb 2-1: Disable of device-initiated U2 failed.
kernel: [24473.196910] usb 2-1: reset SuperSpeed USB device number 11 using xhci-hcd
kernel: [24476.148722] usb 1-1.4: new high-speed USB device number 78 using xhci-hcd
kernel: [24511.457305] usb 1-1: USB disconnect, device number 77
kernel: [24511.462452] usb 1-1.4: USB disconnect, device number 78
kernel: [24511.592722] usb 2-1: USB disconnect, device number 11
kernel: [25422.512217] usb 2-1: new SuperSpeed USB device number 12 using xhci-hcd
kernel: [25422.572939] hub 2-1:1.0: USB hub found
kernel: [25422.576849] hub 2-1:1.0: 4 ports detected
kernel: [25422.664201] usb 1-1: new high-speed USB device number 79 using xhci-hcd
kernel: [25422.845135] hub 1-1:1.0: USB hub found
kernel: [25422.848962] hub 1-1:1.0: 4 ports detected
kernel: [25423.460205] usb 1-1.4: new high-speed USB device number 80 using xhci-hcd
kernel: [25425.904761] usb 1-1: USB disconnect, device number 79
kernel: [25425.910059] usb 1-1.4: USB disconnect, device number 80
kernel: [25426.100257] usb 2-1: USB disconnect, device number 12
kernel: [27771.962897] usb 2-1: new SuperSpeed USB device number 13 using xhci-hcd
kernel: [27772.029214] hub 2-1:1.0: USB hub found
kernel: [27772.033149] hub 2-1:1.0: 4 ports detected
kernel: [27772.114881] usb 1-1: new high-speed USB device number 81 using xhci-hcd
kernel: [27772.285233] hub 1-1:1.0: USB hub found
kernel: [27772.289057] hub 1-1:1.0: 4 ports detected
kernel: [27772.348966] hub 1-1:1.0: Using single TT (err -71)
kernel: [27772.353837] hub 1-1:1.0: config failed, can't get hub status (err -71)
kernel: [27772.378279] xhci-hcd xhci-hcd.3.auto: USB core suspending device not in U0/U1/U2.
kernel: [27772.386064] usb 1-1: Failed to suspend device, error -32
kernel: [27772.391487] usb 1-1: USB disconnect, device number 81
kernel: [27772.413127] usb 2-1: Disable of device-initiated U1 failed.
kernel: [27772.418869] usb 2-1: Disable of device-initiated U2 failed.
kernel: [27773.203384] usb 2-1: USB disconnect, device number 13

[gonewithwind-peter]

I have the same issue  in imx8mq (maaxboard),I have switched to 5.4.24_2.1.0​, but the issue is still there:

https://community.nxp.com/t5/i-MX-Processors/USB3-0-disconnect-issue-for-maaxboard/td-p/1337923

I guess this issue is for chip itself or PCB  USB wires layout issue to cause it. 

any help?

[wenfu]

Thank you igor,

You advise works.

I test it on i.mx8mq-evk board with 4.14.78, usb3.0 disconnet all the time, just like th log shows. Then I change to 5.4.24,everthing go normal.

It seems the usb3.0 driver for imx hardware has some bug. So is it possible to porting the new driver from 5.4.24 to 4.14.78? We have some reason to use the older kernel.

B.R.

Wen

[igorpadykov · Accepted solution]

Hi wenfu

linux 4.14.78 is very old kernel, may be recommended to try latest Linux 5.4.24_2.1.0​

https://source.codeaurora.org/external/imx/linux-imx/tree/?h=imx_5.4.24_2.1.0

Also disconnection may be caused by weak signal, one can check usb layout guidelines

provided in sect.3.7.1. USB routing recommendations  i.MX8M Hardware Developer’s Guide

Best regards
igor