[PATCH v2 05/10] ASoC: amd: acp: add pm ops support for acp pci driver

[Syed Saba Kareem <Syed.SabaKareem@xxxxxxx>]

Add pm ops support for common acp pci driver.

Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@xxxxxxx>
---
 sound/soc/amd/acp/acp-pci.c | 46 +++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/sound/soc/amd/acp/acp-pci.c b/sound/soc/amd/acp/acp-pci.c
index 4fedad1b740e..a32c14a109b7 100644
--- a/sound/soc/amd/acp/acp-pci.c
+++ b/sound/soc/amd/acp/acp-pci.c
@@ -16,6 +16,7 @@
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>
+#include <linux/pm_runtime.h>
 
 #include "amd.h"
 #include "../mach-config.h"
@@ -141,6 +142,11 @@ static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id
 		goto unregister_dmic_dev;
 	}
 	chip->chip_pdev = pdev;
+	dev_set_drvdata(&pci->dev, chip);
+	pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
+	pm_runtime_use_autosuspend(&pci->dev);
+	pm_runtime_put_noidle(&pci->dev);
+	pm_runtime_allow(&pci->dev);
 	return ret;
 
 unregister_dmic_dev:
@@ -153,12 +159,49 @@ static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id
 	return ret;
 };
 
+static int __maybe_unused snd_acp_suspend(struct device *dev)
+{
+	struct acp_chip_info *chip;
+	int ret;
+
+	chip = dev_get_drvdata(dev);
+	ret = acp_deinit(chip->base);
+	if (ret)
+		dev_err(dev, "ACP de-init failed\n");
+	return ret;
+}
+
+static int __maybe_unused snd_acp_resume(struct device *dev)
+{
+	struct acp_chip_info *chip;
+	struct acp_dev_data *adata;
+	struct device child;
+	int ret;
+
+	chip = dev_get_drvdata(dev);
+	ret = acp_init(chip);
+	if (ret)
+		dev_err(dev, "ACP init failed\n");
+	child = chip->chip_pdev->dev;
+	adata = dev_get_drvdata(&child);
+	if (adata)
+		acp_enable_interrupts(adata);
+	return ret;
+}
+
+static const struct dev_pm_ops acp_pm_ops = {
+	SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume)
+};
+
 static void acp_pci_remove(struct pci_dev *pci)
 {
 	struct acp_chip_info *chip;
 	int ret;
 
 	chip = pci_get_drvdata(pci);
+	pm_runtime_forbid(&pci->dev);
+	pm_runtime_get_noresume(&pci->dev);
 	if (dmic_dev)
 		platform_device_unregister(dmic_dev);
 	if (pdev)
@@ -181,6 +224,9 @@ static struct pci_driver snd_amd_acp_pci_driver = {
 	.id_table = acp_pci_ids,
 	.probe = acp_pci_probe,
 	.remove = acp_pci_remove,
+	.driver = {
+		.pm = &acp_pm_ops,
+	},
 };
 module_pci_driver(snd_amd_acp_pci_driver);
 
-- 
2.25.1