[alsa-devel] [RESEND PATCH v2 7/7] ASoC: amd: Added ACP3x system resume and runtime pm ops

[Pierre-Louis Bossart]

On 11/7/19 8:36 AM, Ravulapati Vishnu vardhan rao wrote:
> When system wide suspend happens, ACP will be powered off
> and when system resumes,for audio usecase to continue,
> all the runtime configuration data needs to be programmed again.
> Added resume pm call back to ACP pm ops and
> also Added runtime PM operations for ACP3x PCM platform device.
> Device will enter into D3 state when there is no activity
> on audio I2S lines.

spaces after punctuation and use of capital letters at the start of a 
sentence?

> 
> Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati at amd.com>
> ---
>   sound/soc/amd/raven/pci-acp3x.c | 47 ++++++++++++++++++++++++++++++++++++++++-
>   1 file changed, 46 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/soc/amd/raven/pci-acp3x.c b/sound/soc/amd/raven/pci-acp3x.c
> index 7727c9d..d567585 100644
> --- a/sound/soc/amd/raven/pci-acp3x.c
> +++ b/sound/soc/amd/raven/pci-acp3x.c
> @@ -9,6 +9,9 @@
>   #include <linux/io.h>
>   #include <linux/platform_device.h>
>   #include <linux/interrupt.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/delay.h>
> +#include <sound/pcm.h>
>   
>   #include "acp3x.h"
>   
> @@ -247,6 +250,11 @@ static int snd_acp3x_probe(struct pci_dev *pci,
>   		}
>   		break;
>   	}
> +	pm_runtime_set_autosuspend_delay(&pci->dev, 10000);
> +	pm_runtime_use_autosuspend(&pci->dev);
> +	pm_runtime_set_active(&pci->dev);
> +	pm_runtime_put_noidle(&pci->dev);
> +	pm_runtime_enable(&pci->dev);
>   	return 0;
>   
>   unmap_mmio:
> @@ -268,6 +276,39 @@ static int snd_acp3x_probe(struct pci_dev *pci,
>   	return ret;
>   }
>   
> +static int  snd_acp3x_suspend(struct device *dev)
> +{
> +	int status;
> +	struct acp3x_dev_data *adata = dev_get_drvdata(dev);
> +
> +	status = acp3x_deinit(adata->acp3x_base);
> +	if (status)
> +		dev_err(dev, "ACP de-init failed\n");
> +	else
> +		dev_info(dev, "ACP de-initialized\n");
> +
> +	return 0;
> +}
> +static int  snd_acp3x_resume(struct device *dev)
> +{
> +	int status;
> +	struct acp3x_dev_data *adata = dev_get_drvdata(dev);
> +
> +	status = acp3x_init(adata->acp3x_base);
> +	if (status) {
> +		dev_err(dev, "ACP init failed\n");
> +		return status;
> +	}
> +
> +	return 0;
> +}
> +
> +static const struct dev_pm_ops acp3x_pm = {
> +	.runtime_suspend = snd_acp3x_suspend,
> +	.runtime_resume =  snd_acp3x_resume,
> +	.resume =       snd_acp3x_resume,
> +};

that should have been combined with the previous patch, you resume inits 
in the platform device resume and only add it to the PCI level here.

> +
>   static void snd_acp3x_remove(struct pci_dev *pci)
>   {
>   	int i, ret;
> @@ -283,7 +324,8 @@ static void snd_acp3x_remove(struct pci_dev *pci)
>   	else
>   		dev_info(&pci->dev, "ACP de-initialized\n");
>   	iounmap(adata->acp3x_base);
> -
> +	pm_runtime_disable(&pci->dev);
> +	pm_runtime_get_noresume(&pci->dev);
>   	pci_disable_msi(pci);
>   	pci_release_regions(pci);
>   	pci_disable_device(pci);
> @@ -302,6 +344,9 @@ static struct pci_driver acp3x_driver  = {
>   	.id_table = snd_acp3x_ids,
>   	.probe = snd_acp3x_probe,
>   	.remove = snd_acp3x_remove,
> +	.driver = {
> +		.pm = &acp3x_pm,
> +	}
>   };
>   
>   module_pci_driver(acp3x_driver);
>