linux-kernel - Re: [PATCH v4 2/2] ASoC: qcom: Add support for playback recover after resume

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Date:   Mon, 30 Nov 2020 10:26:31 -0600
From:   Steev Klimaszewski <steev@...i.org>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
        bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
        srinivas.kandagatla@...aro.org, rohitkr@...eaurora.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     V Sujith Kumar Reddy <vsujithk@...eaurora.org>
Subject: Re: [PATCH v4 2/2] ASoC: qcom: Add support for playback recover after
 resume


On 11/27/20 10:59 PM, Srinivasa Rao Mandadapu wrote:
> To support playback continuation after hard suspend(bypass powerd)
> and resume add component driver ops and do regcache sync.
>
> Signed-off-by: V Sujith Kumar Reddy <vsujithk@...eaurora.org>
> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
> ---
>  sound/soc/qcom/lpass-platform.c | 35 +++++++++++++++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
>
> diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
> index 0e71899..12764a8 100644
> --- a/sound/soc/qcom/lpass-platform.c
> +++ b/sound/soc/qcom/lpass-platform.c
> @@ -827,6 +827,39 @@ static void lpass_platform_pcm_free(struct snd_soc_component *component,
>  	}
>  }
>  
> +static int lpass_platform_pcmops_suspend(struct snd_soc_component *component)
> +{
> +	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
> +	struct regmap *map;
> +	unsigned int dai_id = component->id;
> +
> +	if (dai_id == LPASS_DP_RX)
> +		map = drvdata->hdmiif_map;
> +	else
> +		map = drvdata->lpaif_map;
> +
> +	regcache_cache_only(map, true);
> +	regcache_mark_dirty(map);
> +
> +	return 0;
> +}
> +
> +static int lpass_platform_pcmops_resume(struct snd_soc_component *component)
> +{
> +	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
> +	struct regmap *map;
> +	unsigned int dai_id = component->id;
> +
> +	if (dai_id == LPASS_DP_RX)
> +		map = drvdata->hdmiif_map;
> +	else
> +		map = drvdata->lpaif_map;
> +
> +	regcache_cache_only(map, false);
> +	return regcache_sync(map);
> +}
> +
> +
>  static const struct snd_soc_component_driver lpass_component_driver = {
>  	.name		= DRV_NAME,
>  	.open		= lpass_platform_pcmops_open,
> @@ -839,6 +872,8 @@ static const struct snd_soc_component_driver lpass_component_driver = {
>  	.mmap		= lpass_platform_pcmops_mmap,
>  	.pcm_construct	= lpass_platform_pcm_new,
>  	.pcm_destruct	= lpass_platform_pcm_free,
> +	.suspend		= lpass_platform_pcmops_suspend,
> +	.resume			= lpass_platform_pcmops_resume,
>  
>  };
>  

Tested this series on a Lenovo Yoga C630

Tested-by: Steev Klimaszewski <steev@...i.org>