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From:   Artur Petrosyan <arthur.petrosyan@synopsys.com>
To:     John Stultz <john.stultz@linaro.org>,
        Artur Petrosyan <arthur.petrosyan@synopsys.com>
CC:     Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>,
        lkml <linux-kernel@vger.kernel.org>,
        John Youn <John.Youn@synopsys.com>,
        "Felipe Balbi" <felipe.balbi@linux.intel.com>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Subject: Re: [PATCH] usb: dwc2: Fix HiKey regression caused by power_down
 feature
Thread-Topic: [PATCH] usb: dwc2: Fix HiKey regression caused by power_down
 feature
Thread-Index: AQHT7ws4O+8B/axYs0CeMD+6l4m0jQ==
Date:   Thu, 27 Sep 2018 12:33:13 +0000
Message-ID: <3AD91E696667BF4BA728303C178E8A63532ACAE6@am04wembxb.internal.synopsys.com>
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Hi John,=0A=
=0A=
On 9/25/2018 21:59, John Stultz wrote:=0A=
> On Tue, Sep 25, 2018 at 3:04 AM, Artur Petrosyan=0A=
> <arthur.petrosyan@synopsys.com> wrote:=0A=
>> Just a clarification by this commit "[PATCH] usb: dwc2: Fix HiKey=0A=
>> regression caused by power_down feature"=0A=
>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__marc.info_-3Fl-3D=
linux-2Dusb-26m-3D152669095513248-26w-3D2&d=3DDwIBaQ&c=3DDPL6_X_6JkXFx7AXWq=
B0tg&r=3D9hPBFKCJ_nBjJhGVrrlYOeOQjP_HlVzYqrC_D7niMJI&m=3D0lMkv7adFVwkzyaUzD=
6-pUG0iwg4fd6b1-aHQgbqvSI&s=3Dm8SZvo3J_Za08sMbo-S9EkhoA06YnzEN-SRm-uTPnbg&e=
=3D=0A=
>>=0A=
>> the power_down is disabled setting "p->power_down =3D false;" in=0A=
>> "dwc2_set_his_params" function.=0A=
>>=0A=
>> Could you please clarify that the testes done for those 3 patches were=
=0A=
>> done enabling "p->power_down =3D true;" in "dwc2_set_his_params" functio=
n.=0A=
> =0A=
> So if I remove the "power_down =3D true" initialization, USB does not=0A=
> seem to function.=0A=
> =0A=
> If I boot w/ the gadget port removed, the USB host ports do work, but=0A=
> plugging in the gadget cable results in a bunch of:=0A=
>     dwc2 f72c0000.usb: Waiting for Host Mode, Mode=3DPeripheral=0A=
> messages.=0A=
> =0A=
> If I boot w/ the gadget port plugged in, USB gadget mode doesn't seem=0A=
> to function at all, and when I remove the gadget cable nothing=0A=
> happens, it doesn't switch to host mode.=0A=
> =0A=
> thanks=0A=
> -john=0A=
> =0A=
=0A=
We would like to buy the HiKey board to perform testes.=0A=
We found this HiKey LeMaker to have USB 2.0 ports=0A=
https://www.ebay.com/itm/HiKey-LeMaker-version-2GB-Kirin-620-SoC-8-core-ARM=
-Cortex-A53-CPU-ARM-Mali-450/263958047308?hash=3Ditem3d75202a4c:g:aGsAAOSwO=
kxbqqot=0A=
on ebay.=0A=
=0A=
Could you please confirm that it is the right board to test the issues =0A=
you mention.=0A=
=0A=
Regards,=0A=
Artur=0A=