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Commit 54e6becc authored by Vinod Koul's avatar Vinod Koul Committed by Mark Brown
Browse files

ASoC: Intel: add support for platform suspend 



This adds support for platform suspend and resume. We ensure all pcms are
suspended by invoking snd_soc_suspend() and then stop the DSP

Signed-off-by: default avatarSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fc9406ab

sound/soc/intel/sst-mfld-platform-pcm.c

+58 −0
Original line number Diff line number Diff line
@@ -667,6 +667,9 @@ static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd) 


static int sst_soc_probe(struct snd_soc_platform *platform)

{

	struct sst_data *drv = dev_get_drvdata(platform->dev);



	drv->soc_card = platform->component.card;

	return sst_dsp_init_v2_dpcm(platform);

}
@@ -729,9 +732,64 @@ static int sst_platform_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM_SLEEP



static int sst_soc_prepare(struct device *dev)

{

	struct sst_data *drv = dev_get_drvdata(dev);

	int i;



	/* suspend all pcms first */

	snd_soc_suspend(drv->soc_card->dev);

	snd_soc_poweroff(drv->soc_card->dev);



	/* set the SSPs to idle */

	for (i = 0; i < drv->soc_card->num_rtd; i++) {

		struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai;



		if (dai->active) {

			send_ssp_cmd(dai, dai->name, 0);

			sst_handle_vb_timer(dai, false);

		}

	}



	return 0;

}



static void sst_soc_complete(struct device *dev)

{

	struct sst_data *drv = dev_get_drvdata(dev);

	int i;



	/* restart SSPs */

	for (i = 0; i < drv->soc_card->num_rtd; i++) {

		struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai;



		if (dai->active) {

			sst_handle_vb_timer(dai, true);

			send_ssp_cmd(dai, dai->name, 1);

		}

	}

	snd_soc_resume(drv->soc_card->dev);

}



#else



#define sst_soc_prepare NULL

#define sst_soc_complete NULL



#endif





static const struct dev_pm_ops sst_platform_pm = {

	.prepare	= sst_soc_prepare,

	.complete	= sst_soc_complete,

};



static struct platform_driver sst_platform_driver = {

	.driver		= {

		.name		= "sst-mfld-platform",

		.pm             = &sst_platform_pm,

	},

	.probe		= sst_platform_probe,

	.remove		= sst_platform_remove,

sound/soc/intel/sst-mfld-platform.h

+1 −0
Original line number Diff line number Diff line
@@ -174,6 +174,7 @@ struct sst_data { 
	struct sst_platform_data *pdata;

	struct snd_sst_bytes_v2 *byte_stream;

	struct mutex lock;

	struct snd_soc_card *soc_card;

};

int sst_register_dsp(struct sst_device *sst);

int sst_unregister_dsp(struct sst_device *sst);