linux-kernel - Re: [PATCH] ASoC: mediatek: mt8195-mt6359: Use snd_soc_pm

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Date:   Fri, 23 Sep 2022 12:39:54 +0800
From:   Trevor Wu <trevor.wu@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Mark Brown <broonie@...nel.org>,
        Tzung-Bi Shih <tzungbi@...nel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <tiwai@...e.com>, <lgirdwood@...il.com>,
        <linux-mediatek@...ts.infradead.org>, <matthias.bgg@...il.com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ASoC: mediatek: mt8195-mt6359: Use snd_soc_pm_ops
 instead of custom ops

On Thu, 2022-09-22 at 16:10 +0200, AngeloGioacchino Del Regno wrote:
> Il 22/09/22 15:30, Mark Brown ha scritto:
> > On Thu, Sep 22, 2022 at 07:26:21PM +0800, Tzung-Bi Shih wrote:
> > 
> > > snd_soc_pm_ops[1] sets some more fields.  I'm not quite sure
> > > whether
> > > it would introduce any side effect or not.  Perhaps Trevor could
> > > provide some suggestions.
> > 
> > If it does it should be to fix isues rather than introduce new
> > problems - I suspect the other operations just don't work
> > currently.
> 
>  From my upstream tests, this didn't introduce any issues, that's why
> I've
> sent this patch.
> 
> In any case, let's check with Trevor, just as to be extremely sure,
> but please
> use an upstream kernel for eventual tests, as there are quite a bit
> of changes
> between 5.10 and current upstream.
> 
> Cheers,
> Angelo

I think it's not a big risk if Angelo already did the test and
snd_soc_pm_ops is also used in MT8186.
I can help do more tests on 5.10 when the patch is back to chromium in
the future.
MTK also have a plan to support complete suspend/resume functionality
in MT8195. If Tzung-bi has concerns about the patch, I can help submit
the patch at the time.

Thanks,
Trevor