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Message-ID: <20190503204958.GA12532@kozik-lap>
Date:   Fri, 3 May 2019 22:49:58 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jules Maselbas <jmaselbas@...ray.eu>
Cc:     Minas Harutyunyan <hminas@...opsys.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: [BUG BISECT] USB on Exynos4412 fails after usb: dwc2: gadget:
 Replace phyif with phy_utmi_width

Hi,

Bisect pointed commit 707d80f0a3c5 ("usb: dwc2: gadget: Replace phyif
with phy_utmi_width") as reason for failures of USB on Exynos4412,
Odroid U3 board (ARMv7, exynos_defconfig, TFTP boot with nfsroot from
NFSv4):

[    4.333996] usb 1-2: new high-speed USB device number 3 using exynos-ehci
[    4.503942] usb 1-2: device descriptor read/64, error -71
[    4.793970] usb 1-2: device descriptor read/64, error -71
[    4.914748] usb usb1-port2: attempt power cycle
[    6.224267] usb 1-3: new high-speed USB device number 5 using exynos-ehci
[    6.393983] usb 1-3: device descriptor read/64, error -71
[    6.684243] usb 1-3: device descriptor read/64, error -71
[    6.954259] usb 1-3: new high-speed USB device number 6 using exynos-ehci
[    7.123980] usb 1-3: device descriptor read/64, error -71
[    7.413969] usb 1-3: device descriptor read/64, error -71
[    7.534778] usb usb1-port3: attempt power cycle

The boot failure is effect of lack of network adapter (USB, smsc95xx).
Expected:
[    4.285831] usb 1-3: New USB device found, idVendor=0424, idProduct=3503, bcdDevice=a1.a0
[    4.288986] usb 1-3: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    4.299596] hub 1-3:1.0: USB hub found
[    4.300027] hub 1-3:1.0: 3 ports detected
[    5.895541] smsc95xx 1-2:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1

Full kernel log is here:
https://krzk.eu/#/builders/25/builds/1330/steps/14/logs/serial0
https://krzk.eu/#/builders/25/builds/1330

Let me know if you need any more details.

Best regards,
Krzysztof

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