Hi
>
>
> 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.
>
> Signed-off-by: Shengjiu Wang <[email protected]>
> ---
> Changes in v2
> -refine the commit comments.
> -move regcache_mark_dirty to runtime suspend.
>
> sound/soc/fsl/fsl_esai.c | 141 ++++++++++++++++++++++++++--------------------
> -
> 1 file changed, 77 insertions(+), 64 deletions(-)
>
> 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>
>
> @@ -466,30 +467,6 @@ static int fsl_esai_startup(struct
> snd_pcm_substream *substream,
> struct snd_soc_dai *dai) {
> struct fsl_esai *esai_priv = 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 safety
> - */
> - ret = clk_prepare_enable(esai_priv->coreclk);
> - if (ret)
> - return ret;
> - if (!IS_ERR(esai_priv->spbaclk)) {
> - ret = clk_prepare_enable(esai_priv->spbaclk);
> - if (ret)
> - goto err_spbaclk;
> - }
> - if (!IS_ERR(esai_priv->extalclk)) {
> - ret = clk_prepare_enable(esai_priv->extalclk);
> - if (ret)
> - goto err_extalck;
> - }
> - if (!IS_ERR(esai_priv->fsysclk)) {
> - ret = clk_prepare_enable(esai_priv->fsysclk);
> - if (ret)
> - goto err_fsysclk;
> - }
>
> if (!dai->active) {
> /* Set synchronous mode */ @@ -506,16 +483,6 @@ static int
> fsl_esai_startup(struct snd_pcm_substream *substream,
>
> return 0;
>
> -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;
> }
>
> 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;
> }
>
> -static void fsl_esai_shutdown(struct snd_pcm_substream *substream,
> - struct snd_soc_dai *dai)
> -{
> - struct fsl_esai *esai_priv = 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,
>
> static const struct snd_soc_dai_ops fsl_esai_dai_ops = {
> .startup = fsl_esai_startup,
> - .shutdown = fsl_esai_shutdown,
> .trigger = fsl_esai_trigger,
> .hw_params = fsl_esai_hw_params,
> .set_sysclk = fsl_esai_set_dai_sysclk, @@ -947,6 +899,10 @@ static int
> fsl_esai_probe(struct platform_device *pdev)
> return ret;
> }
>
> + pm_runtime_enable(&pdev->dev);
> +
I just have a question, do I need to add pm_runtime_idle(&pdev->dev)?
Best regards
Wang shengjiu
On Fri, Apr 19, 2019 at 11:01:21AM +0000, S.j. Wang wrote:
> > fsl_esai_probe(struct platform_device *pdev)
> > return ret;
> > }
> >
> > + pm_runtime_enable(&pdev->dev);
> > +
> I just have a question, do I need to add pm_runtime_idle(&pdev->dev)?
It gets used to help drivers get into the correct state on startup, if
you're unsure if it's 100% required it shouldn't hurt.