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From:   Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@amd.com>
CC:     <Alexander.Deucher@amd.com>,
        Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@amd.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>,
        "Takashi Iwai" <tiwai@suse.com>,
        Vijendar Mukunda <Vijendar.Mukunda@amd.com>,
        "Maruthi Srinivas Bayyavarapu" <Maruthi.Bayyavarapu@amd.com>,
        Colin Ian King <colin.king@canonical.com>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@alsa-project.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: [PATCH 4/5] ASoC: amd: added pmops for pci driver
Date:   Fri, 27 Sep 2019 04:37:38 +0530
Message-ID: <1569539290-756-4-git-send-email-Vishnuvardhanrao.Ravulapati@amd.com>
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Runtime powermanagement is added for PCI driver.
When there is no activity for at least 10 secs driver
suspends automatically.Runtime- Suspend and resume Stub functions
are added.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
Reviewed-by: Vijendar Mukunda <vijendar.mukunda@amd.com>
---
 sound/soc/amd/raven/pci-acp3x.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/sound/soc/amd/raven/pci-acp3x.c b/sound/soc/amd/raven/pci-acp3x.c
index c0b8fad..6fbb720 100644
--- a/sound/soc/amd/raven/pci-acp3x.c
+++ b/sound/soc/amd/raven/pci-acp3x.c
@@ -170,6 +170,11 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 		ret = -ENODEV;
 		goto unmap_mmio;
 	}
+	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:
@@ -189,6 +194,23 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 	return -ENODEV;
 }
 
+static int  snd_acp3x_suspend(struct device *dev)
+{
+	return 0;
+}
+
+static int  snd_acp3x_resume(struct device *dev)
+{
+	return 0;
+}
+
+static const struct dev_pm_ops acp3x_pm = {
+	.runtime_suspend = snd_acp3x_suspend,
+	.runtime_resume =  snd_acp3x_resume,
+	.resume	=	snd_acp3x_resume,
+
+};
+
 static void snd_acp3x_remove(struct pci_dev *pci)
 {
 	struct acp3x_dev_data *adata = pci_get_drvdata(pci);
@@ -196,6 +218,8 @@ static void snd_acp3x_remove(struct pci_dev *pci)
 	kfree(adata->res);
 	kfree(adata->cell);
 	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);
@@ -214,6 +238,9 @@ 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);
-- 
2.7.4