linux-kernel - Re: [PATCH] ASoC: rt5677: Reintroduce I2C device IDs

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Date:   Fri, 25 Aug 2017 10:24:26 -0400
From:   Tom Rini <trini@...sulko.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, John Keeping <john@...anate.com>,
        Bard Liao <bardliao@...ltek.com>,
        Oder Chiou <oder_chiou@...ltek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        Mark Brown <broonie@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] ASoC: rt5677: Reintroduce I2C device IDs

On Fri, Aug 25, 2017 at 04:56:47PM +0300, Andy Shevchenko wrote:
> +John
> 
> On Tue, 2017-08-22 at 21:51 -0400, Tom Rini wrote:
> > Not all devices with ACPI and this combination of sound devices will
> > have the required information provided via ACPI.  Reintroduce the I2C
> > device ID to restore sound functionality on on the Chromebook 'Samus'
> > model.
> 
> Tom, one more question.
> 
> Apparently you are the one who tested the commit
> 	89128534f925 ("ASoC: rt5677: Add ACPI support")
> year ago.

Yes.

> The commit states that ACPI properties that are used in Chromebook Pixel
> 2015 is non-standard (not the same as for DT).
> 
> However, DSDT shows the opposite!

Interesting.  I'm not an ACPI person, I just tested what John came up
with.

> I would like to ask yuo and John what is the status of that currently?
> Do we have any publicly available laptop with non-standard properties?

Is there any sort of "build date" or similar in the dump I provided
yesterday?  Every once in a while my laptop accidentally books into
ChromeOS and then it might grab and apply some updates and it's not
impossible that Google updated things in the interim.

I'm quite happy to test patches or provide further dumps / etc from my
system.  You might want to start by talking with the person behind
https://github.com/raphael/linux-samus to see if they know more about
different versions of the hardware or at least point you towards more
testers.  Thanks!

-- 
Tom

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