USB gadget regression on i.MX7

[Marek Vasut]

On 6/18/21 3:42 PM, Fabio Estevam wrote:
> Hi Marek,

Hi,

> I noticed that USB  gadget does not work in U-Boot mainline on a warp7 board:
> 
> => ums 0 mmc 0
> UMS: LUN 0, dev mmc 0, hwpart 0, sector 0x0, count 0xe18000
> g_dnl_register: failed!, error: -2
> g_dnl_register failed
> 
> 2021.04 works fine. I bisected and it pointed to:
> 
> 4dcfa3bcbcbc5e0f7da145fff41e120392433062 is the first bad commit
> commit 4dcfa3bcbcbc5e0f7da145fff41e120392433062
> Author: Marek Vasut <marex at denx.de>
> Date:   Wed Mar 31 23:06:07 2021 +0200
> 
>      usb: ehci-mx6: Parse USB PHY and MISC offsets from DT
> 
>      In case DM and OF controler is enabled, but PHY support is disabled,
>      parse USB PHY and MISC component addresses from DT manually. Those
>      component addresses will be used in subsequent patches to access the
>      ANATOP, PHY and MISC registers matching the controller and thus get
>      rid of the ad-hoc controller sequence number mapping.

[...]

> fdtdec_get_alias_seq() fails inside mx6_parse_dt_addrs().
> 
> Any suggestions?

There is no fdtdec_get_alias_seq() in the above commit , and in fact, 
there shouldn't be, since all the sub-device addresses and offsets 
should be parsed out of DT now. So the only suggestion I can offer is, 
look into your DT and see whether the parsing can find all the props there.