linux-kernel - Re: [PATCH v2 07/12] ASoC: arizona-jack: Use arizona->dev for runtime-pm

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Date:   Fri, 22 Jan 2021 01:03:14 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        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>,
        Mark Brown <broonie@...nel.org>, patches@...nsource.cirrus.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        ALSA Development Mailing List <alsa-devel@...a-project.org>
Subject: Re: [PATCH v2 07/12] ASoC: arizona-jack: Use arizona->dev for
 runtime-pm

Hi,

On 1/18/21 1:02 PM, Andy Shevchenko wrote:
> On Sun, Jan 17, 2021 at 6:06 PM Hans de Goede <hdegoede@...hat.com> wrote:
>>
>> Use arizona->dev for runtime-pm as the main shared/libray code from
>> sound/soc/codecs/arizona.c does.
> 
> Can you elaborate switchings from get() to get_sync() in few places

Sorry, those 2 changes really should have been in a separate commit.
I've put the 2 get -> get_sync() changed in their own commit now
with the following commit-msg:

"""
extcon: arizona: Always use pm_runtime_get_sync() when we need the device to be awake

Before this commit the extcon-arizona code was mixing pm_runtime_get()
and pm_runtime_get_sync() in different places. In all cases where
either function is called we make use of the device immediately
afterwards. This means that we should always use pm_runtime_get_sync().
"""

> along with moving disable()?
The enable / disable calls are not moved, they are removed.

Here is a new commit msg which hopefully explains this better
which I plan to use for v3:

"""
Drivers for MFD child-devices such as the arizona codec drivers
and the arizona-extcon driver can choose to either make
runtime_pm_get/_put calls on their own child-device, which will
then be propagated to their parent; or they can make them directly
on their MFD parent-device.

The arizona-extcon code was using runtime_pm_get/_put calls on
its own child-device where as the codec drivers are using
runtime_pm_get/_put calls on their parent.

The arizona-extcon MFD cell/child-device has been removed and this
commit is part of refactoring the arizona-extcon code into a library
to be used directly from the codec drivers.

Specifically this commit moves the code over to make
runtime_pm_get/_put calls on the parent device (on arizona->dev)
bringing the code inline with how the codec drivers do this.

Note this also removes the pm_runtime_enable/_disable calls
as pm_runtime support has already been enabled on the parent-device
by the arizona MFD driver.
"""

Regards,

Hans