linux-kernel - [PATCH v3 2/2] media: i2c: imx219: Enable runtime PM autosuspend

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Message-Id: <20250305142117.29182-3-tarang.raval@siliconsignals.io>
Date: Wed,  5 Mar 2025 19:51:16 +0530
From: Tarang Raval <tarang.raval@...iconsignals.io>
To: sakari.ailus@...ux.intel.com
Cc: kieran.bingham@...asonboard.com,
	Tarang Raval <tarang.raval@...iconsignals.io>,
	Dave Stevenson <dave.stevenson@...pberrypi.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 2/2] media: i2c: imx219: Enable runtime PM autosuspend

Use pm_runtime_put_autosuspend() instead of pm_runtime_put()
to allow autosuspend. Set a 1000ms autosuspend delay in
imx219_probe() to improve power efficiency.

Signed-off-by: Tarang Raval <tarang.raval@...iconsignals.io>
---
 drivers/media/i2c/imx219.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index 12f1aa8824fe..fb18fdc0a834 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -779,7 +779,8 @@ static int imx219_enable_streams(struct v4l2_subdev *sd,
 	return 0;
 
 err_rpm_put:
-	pm_runtime_put(&client->dev);
+	pm_runtime_mark_last_busy(&client->dev);
+	pm_runtime_put_autosuspend(&client->dev);
 	return ret;
 }
 
@@ -803,7 +804,8 @@ static int imx219_disable_streams(struct v4l2_subdev *sd,
 	__v4l2_ctrl_grab(imx219->vflip, false);
 	__v4l2_ctrl_grab(imx219->hflip, false);
 
-	pm_runtime_put(&client->dev);
+	pm_runtime_mark_last_busy(&client->dev);
+	pm_runtime_put_autosuspend(&client->dev);
 
 	return ret;
 }
@@ -1275,6 +1277,8 @@ static int imx219_probe(struct i2c_client *client)
 	}
 
 	pm_runtime_idle(dev);
+	pm_runtime_set_autosuspend_delay(dev, 1000);
+	pm_runtime_use_autosuspend(dev);
 
 	return 0;
 
-- 
2.34.1