[Letux-kernel] musb otg/y-cable regressions, OTG support removal

[H. Nikolaus Schaller]

Hi,

> Am 18.02.2019 um 07:58 schrieb Andreas Kemnade <andreas at kemnade.info>:
> 
> Hi,
> 
> after quite some searching why b_host mode only works very randomly, I found
> out that
> - musb: disable b_host wait timeout for y-cable usage
>  is missing in >= letux-4.18. Seems to be forgotten in a conflict resolution.

Ok. Do you have a reference to the original patch?

> - and them we have this one
> commit 0a9134bd733bbb99bd18f5520a488960170271f2
> Author: Bin Liu <b-liu at ti.com>
> Date:   Mon May 21 08:42:19 2018 -0500
> 
>    usb: musb: disable otg protocol support
> 
>    As decided in the discussion [1] we are deleting the otg protocol
>    support from the musb drivers.
> 
>    First this patch disables the flags for enabling the otg protocols. We
>    will later gradually delete the otg protocol code from the musb drivers.
> 
>    [1] https://www.spinics.net/lists/linux-usb/msg167003.html
> 
>    Signed-off-by: Bin Liu <b-liu at ti.com>
>    Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> 
> that seems also to influence things.

Hm. What are the effects of this? Does it influcence OTG operation on GTA04?

Well, we never had a really OTG compatible socket, just the OTG mode.

BR,
Nikolaus