linux-kernel - Re: [PATCH 01/14] mfd: arizona: Add jack pointer to struct arizona

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Date:   Tue, 29 Dec 2020 16:40:19 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Mark Brown <broonie@...nel.org>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        patches@...nsource.cirrus.com, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Re: [PATCH 01/14] mfd: arizona: Add jack pointer to struct arizona

Hi,

On 12/29/20 4:15 PM, Mark Brown wrote:
> On Tue, Dec 29, 2020 at 03:06:35PM +0000, Charles Keepax wrote:
> 
>> There is maybe more argument for porting the Arizona code across
>> anyways, since for a long time Android didn't properly support extcon
>> either. It supported the earlier out of tree switch stuff, extcon
> 
> Completely moving the driver doesn't cause the same problems as the
> current proposal (unless it drops functionality I guess, there were
> issues with adding new detection types into the input layer but I can't
> remember if this hardware was impacted by that or not).

The input-layer supports the following switches:

SW_HEADPHONE_INSERT
SW_MICROPHONE_INSERT
SW_LINEOUT_INSERT 
SW_JACK_PHYSICAL_INSERT

Which is a 1:1 mapping with the cable-types currently exported by
extcon-arizona.c .

I'm fine with fully moving extcon-arizona.c over to only using
sound/core/jack.c functionality and it no longer exporting an
extcon device.

I guess we should move it out of drivers/extcon then though.
I suggest using: sound/soc/cirrus/arizona-jack-detect.c
Note that sound/soc/cirrus is a new dir here. Would that work
for you ?

And I guess we probably also want to change the MFD instantiated
platform-dev's name to which it binds then?

I suggest using: "arizona-jack-detect" as new pdev name.

It will take me some time before I can make time to implement this,
but this is a plan which I can get behind.

Regards,

Hans