linux-kernel - Re: [PATCH] ASoC: fsl_asrc: Merge suspend/resume function to runtime

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Date:   Sun, 24 May 2020 23:18:27 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     Shengjiu Wang <shengjiu.wang@...il.com>
Cc:     Shengjiu Wang <shengjiu.wang@....com>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        Timur Tabi <timur@...nel.org>, Xiubo Li <Xiubo.Lee@...il.com>,
        linuxppc-dev@...ts.ozlabs.org, Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: fsl_asrc: Merge suspend/resume function to
 runtime_suspend/resume

On Mon, May 25, 2020 at 02:11:18PM +0800, Shengjiu Wang wrote:
> > > @@ -1135,6 +1137,24 @@ static int fsl_asrc_runtime_resume(struct device *dev)
> > >                       goto disable_asrck_clk;
> > >       }
> > >
> > > +     /* Stop all pairs provisionally */
> > > +     regmap_read(asrc->regmap, REG_ASRCTR, &asrctr);
> > > +     regmap_update_bits(asrc->regmap, REG_ASRCTR,
> > > +                        ASRCTR_ASRCEi_ALL_MASK, 0);
> > > +
> > > +     /* Restore all registers */
> > > +     regcache_cache_only(asrc->regmap, false);
> > > +     regcache_mark_dirty(asrc->regmap);
> >
> >
> > I see you doing regcache_mark_dirty() in the resume() now,
> > being different from previously doing in suspend()?

> Which is for probe -> runtime_resume case.
> After probe, the power may be disabled, so move mark_dirtry
> to runtime_resume, then regcache can re-write all the registers.

I see. Just noticed that you add a regcache_cache_only
in probe(). Acked already. Thanks.