linux-kernel - [RFC PATCH v2 2/2] ASoC: SOF: Use multi PM domains helpers

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Message-Id: <20200304121943.28989-3-daniel.baluta@oss.nxp.com>
Date:   Wed,  4 Mar 2020 14:19:43 +0200
From:   Daniel Baluta <daniel.baluta@....nxp.com>
To:     rjw@...ysocki.net, len.brown@...el.com,
        ranjani.sridharan@...ux.intel.com
Cc:     daniel.baluta@....nxp.com, aisheng.dong@....com,
        ulf.hansson@...aro.org, festevam@...il.com,
        alsa-devel@...a-project.org, linux-pm@...r.kernel.org,
        gregkh@...uxfoundation.org, s.hauer@...gutronix.de,
        khilman@...nel.org, linux-kernel@...r.kernel.org,
        daniel.baluta@....com, pierre-louis.bossart@...ux.intel.com,
        paul.olaru@....com, linux-imx@....com, kernel@...gutronix.de,
        shawnguo@...nel.org, shengjiu.wang@....com,
        linux-arm-kernel@...ts.infradead.org
Subject: [RFC PATCH v2 2/2] ASoC: SOF: Use multi PM domains helpers

From: Daniel Baluta <daniel.baluta@....com>

Use dev_multi_pm_attach / dev_multi_pm_detach instead of the hardcoded
version.

Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 sound/soc/sof/imx/imx8.c | 60 ++++++----------------------------------
 1 file changed, 9 insertions(+), 51 deletions(-)

diff --git a/sound/soc/sof/imx/imx8.c b/sound/soc/sof/imx/imx8.c
index b692752b2178..2e7635b697cf 100644
--- a/sound/soc/sof/imx/imx8.c
+++ b/sound/soc/sof/imx/imx8.c
@@ -51,10 +51,7 @@ struct imx8_priv {
 	struct imx_sc_ipc *sc_ipc;
 
 	/* Power domain handling */
-	int num_domains;
-	struct device **pd_dev;
-	struct device_link **link;
-
+	struct dev_multi_pm_domain_data *mpd;
 };
 
 static void imx8_get_reply(struct snd_sof_dev *sdev)
@@ -207,7 +204,6 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 	struct resource res;
 	u32 base, size;
 	int ret = 0;
-	int i;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -218,45 +214,15 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 	priv->sdev = sdev;
 
 	/* power up device associated power domains */
-	priv->num_domains = of_count_phandle_with_args(np, "power-domains",
-						       "#power-domain-cells");
-	if (priv->num_domains < 0) {
-		dev_err(sdev->dev, "no power-domains property in %pOF\n", np);
-		return priv->num_domains;
-	}
-
-	priv->pd_dev = devm_kmalloc_array(&pdev->dev, priv->num_domains,
-					  sizeof(*priv->pd_dev), GFP_KERNEL);
-	if (!priv->pd_dev)
-		return -ENOMEM;
-
-	priv->link = devm_kmalloc_array(&pdev->dev, priv->num_domains,
-					sizeof(*priv->link), GFP_KERNEL);
-	if (!priv->link)
-		return -ENOMEM;
-
-	for (i = 0; i < priv->num_domains; i++) {
-		priv->pd_dev[i] = dev_pm_domain_attach_by_id(&pdev->dev, i);
-		if (IS_ERR(priv->pd_dev[i])) {
-			ret = PTR_ERR(priv->pd_dev[i]);
-			goto exit_unroll_pm;
-		}
-		priv->link[i] = device_link_add(&pdev->dev, priv->pd_dev[i],
-						DL_FLAG_STATELESS |
-						DL_FLAG_PM_RUNTIME |
-						DL_FLAG_RPM_ACTIVE);
-		if (!priv->link[i]) {
-			ret = -ENOMEM;
-			dev_pm_domain_detach(priv->pd_dev[i], false);
-			goto exit_unroll_pm;
-		}
-	}
+	priv->mpd = dev_multi_pm_attach(&pdev->dev);
+	if (IS_ERR(priv->mpd))
+		return PTR_ERR(priv->mpd);
 
 	ret = imx_scu_get_handle(&priv->sc_ipc);
 	if (ret) {
 		dev_err(sdev->dev, "Cannot obtain SCU handle (err = %d)\n",
 			ret);
-		goto exit_unroll_pm;
+		goto exit_detach_pm;
 	}
 
 	priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
@@ -264,7 +230,7 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 						      pdev, sizeof(*pdev));
 	if (IS_ERR(priv->ipc_dev)) {
 		ret = PTR_ERR(priv->ipc_dev);
-		goto exit_unroll_pm;
+		goto exit_detach_pm;
 	}
 
 	priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
@@ -328,26 +294,18 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 
 exit_pdev_unregister:
 	platform_device_unregister(priv->ipc_dev);
-exit_unroll_pm:
-	while (--i >= 0) {
-		device_link_del(priv->link[i]);
-		dev_pm_domain_detach(priv->pd_dev[i], false);
-	}
-
+exit_detach_pm:
+	dev_multi_pm_detach(priv->mpd);
 	return ret;
 }
 
 static int imx8_remove(struct snd_sof_dev *sdev)
 {
 	struct imx8_priv *priv = (struct imx8_priv *)sdev->private;
-	int i;
 
 	platform_device_unregister(priv->ipc_dev);
 
-	for (i = 0; i < priv->num_domains; i++) {
-		device_link_del(priv->link[i]);
-		dev_pm_domain_detach(priv->pd_dev[i], false);
-	}
+	dev_multi_pm_detach(priv->mpd);
 
 	return 0;
 }
-- 
2.17.1