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From:   "S.j. Wang" <shengjiu.wang@nxp.com>
To:     "S.j. Wang" <shengjiu.wang@nxp.com>,
        "timur@kernel.org" <timur@kernel.org>,
        "nicoleotsuka@gmail.com" <nicoleotsuka@gmail.com>,
        "Xiubo.Lee@gmail.com" <Xiubo.Lee@gmail.com>,
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CC:     "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [alsa-devel] [PATCH V2] ASoC: fsl_esai: Add pm runtime function
Thread-Topic: [alsa-devel] [PATCH V2] ASoC: fsl_esai: Add pm runtime function
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Date:   Fri, 19 Apr 2019 11:01:21 +0000
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Hi

>=20
>=20
> Add pm runtime support and move clock handling there.
> fsl_esai_suspend is replaced by pm_runtime_force_suspend.
> fsl_esai_resume is replaced by pm_runtime_force_resume.
>=20
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> ---
> Changes in v2
> -refine the commit comments.
> -move regcache_mark_dirty to runtime suspend.
>=20
>  sound/soc/fsl/fsl_esai.c | 141 ++++++++++++++++++++++++++---------------=
-----
> -
>  1 file changed, 77 insertions(+), 64 deletions(-)
>=20
> diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index
> bad0dfed6b68..10d2210c91ef 100644
> --- a/sound/soc/fsl/fsl_esai.c
> +++ b/sound/soc/fsl/fsl_esai.c
> @@ -9,6 +9,7 @@
>  #include <linux/module.h>
>  #include <linux/of_irq.h>
>  #include <linux/of_platform.h>
> +#include <linux/pm_runtime.h>
>  #include <sound/dmaengine_pcm.h>
>  #include <sound/pcm_params.h>
>=20
> @@ -466,30 +467,6 @@ static int fsl_esai_startup(struct
> snd_pcm_substream *substream,
>                             struct snd_soc_dai *dai)  {
>         struct fsl_esai *esai_priv =3D snd_soc_dai_get_drvdata(dai);
> -       int ret;
> -
> -       /*
> -        * Some platforms might use the same bit to gate all three or two=
 of
> -        * clocks, so keep all clocks open/close at the same time for saf=
ety
> -        */
> -       ret =3D clk_prepare_enable(esai_priv->coreclk);
> -       if (ret)
> -               return ret;
> -       if (!IS_ERR(esai_priv->spbaclk)) {
> -               ret =3D clk_prepare_enable(esai_priv->spbaclk);
> -               if (ret)
> -                       goto err_spbaclk;
> -       }
> -       if (!IS_ERR(esai_priv->extalclk)) {
> -               ret =3D clk_prepare_enable(esai_priv->extalclk);
> -               if (ret)
> -                       goto err_extalck;
> -       }
> -       if (!IS_ERR(esai_priv->fsysclk)) {
> -               ret =3D clk_prepare_enable(esai_priv->fsysclk);
> -               if (ret)
> -                       goto err_fsysclk;
> -       }
>=20
>         if (!dai->active) {
>                 /* Set synchronous mode */ @@ -506,16 +483,6 @@ static in=
t
> fsl_esai_startup(struct snd_pcm_substream *substream,
>=20
>         return 0;
>=20
> -err_fsysclk:
> -       if (!IS_ERR(esai_priv->extalclk))
> -               clk_disable_unprepare(esai_priv->extalclk);
> -err_extalck:
> -       if (!IS_ERR(esai_priv->spbaclk))
> -               clk_disable_unprepare(esai_priv->spbaclk);
> -err_spbaclk:
> -       clk_disable_unprepare(esai_priv->coreclk);
> -
> -       return ret;
>  }
>=20
>  static int fsl_esai_hw_params(struct snd_pcm_substream *substream, @@
> -576,20 +543,6 @@ static int fsl_esai_hw_params(struct
> snd_pcm_substream *substream,
>         return 0;
>  }
>=20
> -static void fsl_esai_shutdown(struct snd_pcm_substream *substream,
> -                             struct snd_soc_dai *dai)
> -{
> -       struct fsl_esai *esai_priv =3D snd_soc_dai_get_drvdata(dai);
> -
> -       if (!IS_ERR(esai_priv->fsysclk))
> -               clk_disable_unprepare(esai_priv->fsysclk);
> -       if (!IS_ERR(esai_priv->extalclk))
> -               clk_disable_unprepare(esai_priv->extalclk);
> -       if (!IS_ERR(esai_priv->spbaclk))
> -               clk_disable_unprepare(esai_priv->spbaclk);
> -       clk_disable_unprepare(esai_priv->coreclk);
> -}
> -
>  static int fsl_esai_trigger(struct snd_pcm_substream *substream, int cmd=
,
>                             struct snd_soc_dai *dai)  { @@ -658,7 +611,6 =
@@ static int
> fsl_esai_trigger(struct snd_pcm_substream *substream, int cmd,
>=20
>  static const struct snd_soc_dai_ops fsl_esai_dai_ops =3D {
>         .startup =3D fsl_esai_startup,
> -       .shutdown =3D fsl_esai_shutdown,
>         .trigger =3D fsl_esai_trigger,
>         .hw_params =3D fsl_esai_hw_params,
>         .set_sysclk =3D fsl_esai_set_dai_sysclk, @@ -947,6 +899,10 @@ sta=
tic int
> fsl_esai_probe(struct platform_device *pdev)
>                 return ret;
>         }
>=20
> +       pm_runtime_enable(&pdev->dev);
> +

I just have a question, do I need to add pm_runtime_idle(&pdev->dev)?

Best regards
Wang shengjiu