Re: [PATCH v2] arm64: dts: msm8996: Use dwc3-qcom glue driver for USB

From: Felipe Balbi <felipe.balbi@linux.intel.com>
To: Pierre LE MAGOUROU <plemagourou@softbankrobotics.com>,
	Vivek Gautam <vivek.gautam@codeaurora.org>
Cc: Julien Massot <jmassot@softbankrobotics.com>,
	Manu Gautam <mgautam@codeaurora.org>,
	andy.gross@linaro.org, linux-soc@vger.kernel.org,
	devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	dianders@chromium.org, linux-usb@vger.kernel.org,
	gregkh@linuxfoundation.org, bjorn.andersson@linaro.org
Subject: Re: [PATCH v2] arm64: dts: msm8996: Use dwc3-qcom glue driver for USB
Date: Wed, 27 Jun 2018 12:27:30 +0300	[thread overview]
Message-ID: <87r2ksshod.fsf@linux.intel.com> (raw)
In-Reply-To: <CADb+VZKtAspuvO64FVEBHUbcB0Nr57jWpBmpS5GfCE+QKD4CcA@mail.gmail.com>

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Hi,

Pierre LE MAGOUROU <plemagourou@softbankrobotics.com> writes:
>> > I have a branch that's based on 4.17. You can pick that.
>> > https://github.com/vivekgautam1/linux/commits/v4.17/db820c
>> >
>>
>> Thanks a lot,
>> I will test this branch.
>>
>>
> I just tested USB gadget with this branch on the db820c.
>
> If I activate a USB composite gadget device with EEM function, I can see
> the 'usb0' Ethernet interfaces on the device and on the host and I can ping
> the db820c from the host.
> When I create a USB composite gadget device with UAC2 function, I can see
> the audio cards on host and device but cannot play or record any sound.
>
> While looking at dwc3 traces with Ftrace, I noticed that the dwc3 driver is
> stuck on wait_event_lock_irq() in dwc3_gadget_ep_dequeue() function when I
> use UAC2 gadget.

can you share tracepoint data?

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-- 
balbi

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