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From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
To: Ruslan Bilovol <ruslan.bilovol@gmail.com>,
	Linux USB <linux-usb@vger.kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: RPi4 DWC2 gadget doesn't copy data to a buffer in ep0 SETUP + DATA OUT transaction
Date: Thu, 11 Feb 2021 11:21:15 +0000	[thread overview]
Message-ID: <2e068eea-605c-3f7f-904f-2a1d7279879f@synopsys.com> (raw)
In-Reply-To: <CAB=otbTVxa=nGWF4K1AYcYyPceYYRkC_1HYSb_Nhu6C9RMZEHA@mail.gmail.com>

Hi Ruslan,

On 2/1/2021 3:44 AM, Ruslan Bilovol wrote:
> Hi Minas and other USB experts,
> 
> I'm currently developing new features for UAC1/UAC2 audio gadgets
> like Volume/Mute controls which use Control SETUP + DATA OUT
> transactions through ep0.
> 
> While it works fine on BeagleBone black board with MUSB UDC,
> on Raspberry Pi 4 with DWC2 UDC there is an issue.
> 
> I found that when DWC2 receives ep0 SETUP + DATA OUT transaction,
> it doesn't copy data transferred from the host to EP0 in DATA OUT stage
> to the usb_request->buf buffer. This buffer contains unchanged data from
> previous transactions.
> 

Could you please send debug log with issue and usb trace.

Thanks,
Minas

  reply	other threads:[~2021-02-11 11:49 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-31 23:44 Ruslan Bilovol
2021-02-11 11:21 ` Minas Harutyunyan [this message]
2021-04-19 13:22   ` Pavel Hofman
2021-04-19 16:30     ` Minas Harutyunyan
2021-04-20  8:19       ` Pavel Hofman

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