Re: [PATCH v2] ASoC: fsl_ssi: Fix channel swap on playback start

From: Caleb Crome <caleb@crome.org>
To: Fabio Estevam <festevam@gmail.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
	Arnaud Mouiche <arnaud.mouiche@invoxia.com>,
	Timur Tabi <timur@tabi.org>,
	Nicolin Chen <nicoleotsuka@gmail.com>,
	Mark Brown <broonie@kernel.org>,
	Max Krummenacher <max.krummenacher@toradex.com>,
	Fabio Estevam <fabio.estevam@nxp.com>,
	Sascha Hauer <kernel@pengutronix.de>
Subject: Re: [PATCH v2] ASoC: fsl_ssi: Fix channel swap on playback start
Date: Mon, 3 Apr 2017 16:42:25 -0700	[thread overview]
Message-ID: <CAG5mAdzKuWHMQLiDOzabdp9Xxs1z5sYNdkt17kGge-4wop5nFA@mail.gmail.com> (raw)
In-Reply-To: <CAOMZO5DzNqKdOHOb_SXQwzEDfD1B4yQVjYxYaHhFHzWNUSE-ig@mail.gmail.com>

On Mon, Apr 3, 2017 at 4:40 PM, Fabio Estevam <festevam@gmail.com> wrote:
> Hi Caleb,
>
> On Mon, Apr 3, 2017 at 8:22 PM, Caleb Crome <caleb@crome.org> wrote:
>
>> With a vanilla kernel, it works perfectly with the pinctrl patch.
>> In this case, I ran a cable from the wandboard over to my computer and
>> recorded with audacity, using your wile true script above.
>> Here you can see that with 4.11-rc5 plus the pinctrl patch, there is
>> no channel swapping:
>>
>> http://imgur.com/od0LoJP
>
> Which wandboard type do you have? mx6solo,dl or quad?
>
> I am using  imx6dl-wandboard.
>
> I am surprised that the channel swap does not happen on your case.
> Maybe you need to run the test for an extended period of time?

Running on a quad.

>
> On my case I usually get the swap in 1/10 of times. Max uses a Toradex
> MX6DL Colibri board and sees the swap in 3-4% of the times.

I'll run it for a much longer time and see what happens.