linux-kernel - [PATCH] media: i2c: dw9768: Use runtime PM autosuspend

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Message-ID: <20241012032805.23545-1-zhi.mao@mediatek.com>
Date: Sat, 12 Oct 2024 11:25:53 +0800
From: Zhi Mao <zhi.mao@...iatek.com>
To: <fshao@...omium.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>, "Mauro
 Carvalho Chehab" <mchehab@...nel.org>, Matthias Brugger
	<matthias.bgg@...il.com>
CC: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	<linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<shengnan.wang@...iatek.com>, <yaya.chang@...iatek.com>,
	<teddy.chen@...iatek.com>, <yunkec@...omium.org>, <10572168@...com>,
	<ot_xiaofeiw.wang@...iatek.com>, Zhi Mao <zhi.mao@...iatek.com>
Subject: [PATCH] media: i2c: dw9768: Use runtime PM autosuspend

Use runtime PM autosuspend function to avoid rapid power state bouncing.

Signed-off-by: Zhi Mao <zhi.mao@...iatek.com>
---
 drivers/media/i2c/dw9768.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/dw9768.c b/drivers/media/i2c/dw9768.c
index 18ef2b35c9aa..9d39198a9ad4 100644
--- a/drivers/media/i2c/dw9768.c
+++ b/drivers/media/i2c/dw9768.c
@@ -374,7 +374,8 @@ static int dw9768_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 
 static int dw9768_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 {
-	pm_runtime_put(sd->dev);
+	pm_runtime_mark_last_busy(sd->dev);
+	pm_runtime_put_autosuspend(sd->dev);
 
 	return 0;
 }
@@ -490,6 +491,8 @@ static int dw9768_probe(struct i2c_client *client)
 		goto err_power_off;
 	}
 
+	pm_runtime_set_autosuspend_delay(dev, 1000);
+	pm_runtime_use_autosuspend(dev);
 	pm_runtime_idle(dev);
 
 	return 0;
-- 
2.46.0