linux-kernel - Re: [PATCH] usb: dwc3: Enable GBit Ethernet on Odroid XU4

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Date:   Fri, 8 Feb 2019 20:35:05 +0100
From:   Jochen Sprickerhof <jochen@...ickerhof.de>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     Roger Quadros <rogerq@...com>, Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH] usb: dwc3: Enable GBit Ethernet on Odroid XU4

Hi Marek,

* Marek Szyprowski <m.szyprowski@...sung.com> [2019-02-08 13:36]:
>>>> On 21/01/19 16:02, Jochen Sprickerhof wrote:
>>> [..]
>>>>> I'm not sure why this it only works with the driver compiled into the
>>>>> kernel nor why it needs a hard reset or why it was the line was dropped
>>>>> when the patch was accepted. Would be great to get some feedback of the
>>>>> authors.
>>>> When XHCI driver is compiled into the kernel are the relevant PHY drivers
>>>> compiled in as well?
>>> Only CONFIG_USB_PHY=y (I took the config from the linux-image-4.19.0-1-armmp_4.19.13-1_armhf.deb Debian package as a basis where this is the default).
>
>I confirm that on Odroid XU4 USB 3.0 works only when all related drivers
>(dwc3, xhci and exynos5 drd phy) are compiled into the kernel. If they
>are compiled as modules, USB 3.0 calibration doesn't work. The mentioned
>patch doesn't fix anything.

I've just tried Linux v5.0-rc5 with the Debian config and 
USB_XHCI_PLATFORM=y and it works, thanks!

Is there a way to make it work with xhci compiled as a module, so it 
would work in Debian out of the box?

Cheers Jochen

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