linux-kernel - [PATCH 08/13] ASoC: amd: add acp6x pci driver pm ops

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Date:   Mon, 11 Oct 2021 11:26:16 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC:     <Alexander.Deucher@....com>, <Basavaraj.Hiregoudar@....com>,
        <Sunil-kumar.Dommati@....com>, <Mario.Limonciello@....com>,
        <Richard.Gong@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        "Liam Girdwood" <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        "Takashi Iwai" <tiwai@...e.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 08/13] ASoC: amd: add acp6x pci driver pm ops

Add acp6x pci driver pm ops.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/yc/acp6x.h     |  3 +++
 sound/soc/amd/yc/pci-acp6x.c | 40 ++++++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/sound/soc/amd/yc/acp6x.h b/sound/soc/amd/yc/acp6x.h
index 3f83de229409..b0d3f6a9d0ce 100644
--- a/sound/soc/amd/yc/acp6x.h
+++ b/sound/soc/amd/yc/acp6x.h
@@ -52,6 +52,9 @@
 #define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
 #define MIN_BUFFER MAX_BUFFER
 
+/* time in ms for runtime suspend delay */
+#define ACP_SUSPEND_DELAY_MS	2000
+
 enum acp_config {
 	ACP_CONFIG_0 = 0,
 	ACP_CONFIG_1,
diff --git a/sound/soc/amd/yc/pci-acp6x.c b/sound/soc/amd/yc/pci-acp6x.c
index 86b33f401e12..5f07db987cca 100644
--- a/sound/soc/amd/yc/pci-acp6x.c
+++ b/sound/soc/amd/yc/pci-acp6x.c
@@ -11,6 +11,7 @@
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
 
 #include "acp6x.h"
 
@@ -245,6 +246,11 @@ static int snd_acp6x_probe(struct pci_dev *pci,
 		dev_err(&pci->dev, "ACP PCI IRQ request failed\n");
 		goto unregister_devs;
 	}
+	pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&pci->dev);
+	pm_runtime_put_noidle(&pci->dev);
+	pm_runtime_allow(&pci->dev);
+
 	return 0;
 unregister_devs:
 	for (--index; index >= 0; index--)
@@ -260,6 +266,35 @@ static int snd_acp6x_probe(struct pci_dev *pci,
 	return ret;
 }
 
+static int __maybe_unused snd_acp6x_suspend(struct device *dev)
+{
+	struct acp6x_dev_data *adata;
+	int ret;
+
+	adata = dev_get_drvdata(dev);
+	ret = acp6x_deinit(adata->acp6x_base);
+	if (ret)
+		dev_err(dev, "ACP de-init failed\n");
+	return ret;
+}
+
+static int __maybe_unused snd_acp6x_resume(struct device *dev)
+{
+	struct acp6x_dev_data *adata;
+	int ret;
+
+	adata = dev_get_drvdata(dev);
+	ret = acp6x_init(adata->acp6x_base);
+	if (ret)
+		dev_err(dev, "ACP init failed\n");
+	return ret;
+}
+
+static const struct dev_pm_ops acp6x_pm = {
+	SET_RUNTIME_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume)
+};
+
 static void snd_acp6x_remove(struct pci_dev *pci)
 {
 	struct acp6x_dev_data *adata;
@@ -273,6 +308,8 @@ static void snd_acp6x_remove(struct pci_dev *pci)
 	ret = acp6x_deinit(adata->acp6x_base);
 	if (ret)
 		dev_err(&pci->dev, "ACP de-init failed\n");
+	pm_runtime_forbid(&pci->dev);
+	pm_runtime_get_noresume(&pci->dev);
 	pci_release_regions(pci);
 	pci_disable_device(pci);
 }
@@ -290,6 +327,9 @@ static struct pci_driver yc_acp6x_driver  = {
 	.id_table = snd_acp6x_ids,
 	.probe = snd_acp6x_probe,
 	.remove = snd_acp6x_remove,
+	.driver = {
+		.pm = &acp6x_pm,
+	}
 };
 
 module_pci_driver(yc_acp6x_driver);
-- 
2.25.1