[U-Boot] Bisected broken Ethernet support on ODROID-X (Exynos4412 board)

[Simon Glass]

Hi,

On 20 October 2015 at 08:13, Siarhei Siamashka
<siarhei.siamashka at gmail.com> wrote:
> Hello,
>
> Ethernet support does not work anymore when using the current U-Boot
> (version v2014.10) on the ODROID-X board. Bisecting shows that this
> happened starting from commit 874dde80169e0a0c00020e2e0bbcd380c61097e3
> ("dm: usb: exynos: Use driver model for USB"):
>     http://git.denx.de/?p=u-boot.git;a=commitdiff;h=874dde80169e0a0c00020e2e0bbcd380c61097e3
>
> Below are the logs from the serial console.
>
> === works properly ==
>
> U-Boot 2015.04-00271-g52e6935-dirty (Oct 20 2015 - 16:38:09)
>
> CPU:    Exynos4412 at 1000MHz
> Model: Odroid based on Exynos4412
> DRAM:  1 GiB
> Board PMIC init
> MMC:   SAMSUNG SDHCI: 0, EXYNOS DWMMC: 1
> Net:   No ethernet found.
> Hit any key to stop autoboot:  0
> reading boot.scr
> 129 bytes read in 11 ms (10.7 KiB/s)
> ## Executing script at 40408000
> starting USB...
> USB0:   USB EHCI 1.00
> scanning bus 0 for devices... 4 USB Device(s) found
>        scanning usb for storage devices... 0 Storage Device(s) found
>        scanning usb for ethernet devices... 1 Ethernet Device(s) found
>
> === fails ==
>
> U-Boot 2015.04-00273-g78ab40b-dirty (Oct 20 2015 - 16:41:11)
>
> CPU:    Exynos4412 at 1000MHz
> Model: Odroid based on Exynos4412
> DRAM:  1 GiB
> Board PMIC init
> MMC:   SAMSUNG SDHCI: 0, EXYNOS DWMMC: 1
> Net:   No ethernet found.
> Hit any key to stop autoboot:  0
> reading boot.scr
> 129 bytes read in 12 ms (9.8 KiB/s)
> ## Executing script at 40408000
> starting USB...
> USB-1:   USB EHCI 1.00
> scanning bus 0 for devices... 1 USB Device(s) found
>        scanning usb for ethernet devices... 0 Ethernet Device(s) found
>
> ===
>
> As a test, reverting f56da290b8df14a058b43735494dbbb0f8521a89 ("Drop
> the code that doesn't use driver model for USB.") and disabling
> CONFIG_DM_USB in odroid_defconfig makes it work again.

Does this problem happen on the XU3?

Are you able to debug this? You can use 'dm tree' to see what devices
are present before and after the 'usb start'.

Regards,
Simon