Commit e342ac08 authored by Subhransu S. Prusty's avatar Subhransu S. Prusty Committed by Mark Brown
Browse files

ASoC: hdac_hdmi: Add PM support for HDMI 



Power up/down the AFG node during runtime resume/suspend.

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 18382ead

sound/soc/codecs/hdac_hdmi.c

+64 −0
Original line number Diff line number Diff line
@@ -60,6 +60,13 @@ struct hdac_hdmi_priv { 
	struct hdac_hdmi_dai_pin_map dai_map[3];

};



static inline struct hdac_ext_device *to_hda_ext_device(struct device *dev)

{

	struct hdac_device *hdac = container_of(dev, struct hdac_device, dev);



	return container_of(hdac, struct hdac_ext_device, hdac);

}



static int

hdac_hdmi_query_cvt_params(struct hdac_device *hdac, struct hdac_hdmi_cvt *cvt)

{
@@ -250,11 +257,28 @@ static int hdmi_codec_probe(struct snd_soc_codec *codec) 
	/* Imp: Store the card pointer in hda_codec */

	edev->card = dapm->card->snd_card;



	/*

	 * hdac_device core already sets the state to active and calls

	 * get_noresume. So enable runtime and set the device to suspend.

	 */

	pm_runtime_enable(&edev->hdac.dev);

	pm_runtime_put(&edev->hdac.dev);

	pm_runtime_suspend(&edev->hdac.dev);



	return 0;

}



static int hdmi_codec_remove(struct snd_soc_codec *codec)

{

	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);



	pm_runtime_disable(&edev->hdac.dev);

	return 0;

}



static struct snd_soc_codec_driver hdmi_hda_codec = {

	.probe		= hdmi_codec_probe,

	.remove		= hdmi_codec_remove,

	.idle_bias_off	= true,

};
@@ -307,6 +331,45 @@ static int hdac_hdmi_dev_remove(struct hdac_ext_device *edev) 
	return 0;

}



#ifdef CONFIG_PM

static int hdac_hdmi_runtime_suspend(struct device *dev)

{

	struct hdac_ext_device *edev = to_hda_ext_device(dev);

	struct hdac_device *hdac = &edev->hdac;



	dev_dbg(dev, "Enter: %s\n", __func__);



	/* Power down afg */

	if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D3))

		snd_hdac_codec_write(hdac, hdac->afg, 0,

			AC_VERB_SET_POWER_STATE, AC_PWRST_D3);



	return 0;

}



static int hdac_hdmi_runtime_resume(struct device *dev)

{

	struct hdac_ext_device *edev = to_hda_ext_device(dev);

	struct hdac_device *hdac = &edev->hdac;



	dev_dbg(dev, "Enter: %s\n", __func__);



	/* Power up afg */

	if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D0))

		snd_hdac_codec_write(hdac, hdac->afg, 0,

			AC_VERB_SET_POWER_STATE, AC_PWRST_D0);



	return 0;

}

#else

#define hdac_hdmi_runtime_suspend NULL

#define hdac_hdmi_runtime_resume NULL

#endif



static const struct dev_pm_ops hdac_hdmi_pm = {

	SET_RUNTIME_PM_OPS(hdac_hdmi_runtime_suspend, hdac_hdmi_runtime_resume, NULL)

};



static const struct hda_device_id hdmi_list[] = {

	HDA_CODEC_EXT_ENTRY(0x80862809, 0x100000, "Skylake HDMI", 0),

	{}
@@ -318,6 +381,7 @@ static struct hdac_ext_driver hdmi_driver = { 
	. hdac = {

		.driver = {

			.name   = "HDMI HDA Codec",

			.pm = &hdac_hdmi_pm,

		},

		.id_table       = hdmi_list,

	},