[PATCH v4 13/21] media: imx355: Use pm_runtime autosuspend_delay

[Dave Stevenson]

Avoid powering the sensor up and down unnecessarily by using
pm_runtime's autosuspend_delay feature.

Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
Reviewed-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
---
 drivers/media/i2c/imx355.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/imx355.c b/drivers/media/i2c/imx355.c
index 120eda46d982..17a2acc1152d 100644
--- a/drivers/media/i2c/imx355.c
+++ b/drivers/media/i2c/imx355.c
@@ -1074,7 +1074,7 @@ static int imx355_set_stream(struct v4l2_subdev *sd, int enable)
 			goto err_rpm_put;
 	} else {
 		imx355_stop_streaming(imx355);
-		pm_runtime_put(imx355->dev);
+		pm_runtime_put_autosuspend(imx355->dev);
 	}
 
 	/* vflip and hflip cannot change during streaming */
@@ -1086,7 +1086,7 @@ static int imx355_set_stream(struct v4l2_subdev *sd, int enable)
 	return ret;
 
 err_rpm_put:
-	pm_runtime_put(imx355->dev);
+	pm_runtime_put_autosuspend(imx355->dev);
 err_unlock:
 	mutex_unlock(&imx355->mutex);
 
@@ -1436,6 +1436,8 @@ static int imx355_probe(struct i2c_client *client)
 	 */
 	pm_runtime_set_active(imx355->dev);
 	pm_runtime_enable(imx355->dev);
+	pm_runtime_set_autosuspend_delay(imx355->dev, 1000);
+	pm_runtime_use_autosuspend(imx355->dev);
 
 	ret = v4l2_async_register_subdev_sensor(&imx355->sd);
 	if (ret < 0)
@@ -1448,6 +1450,7 @@ static int imx355_probe(struct i2c_client *client)
 error_media_entity_runtime_pm:
 	pm_runtime_disable(imx355->dev);
 	pm_runtime_set_suspended(imx355->dev);
+	pm_runtime_dont_use_autosuspend(imx355->dev);
 	media_entity_cleanup(&imx355->sd.entity);
 
 error_handler_free:
@@ -1478,6 +1481,8 @@ static void imx355_remove(struct i2c_client *client)
 		pm_runtime_set_suspended(imx355->dev);
 	}
 
+	pm_runtime_dont_use_autosuspend(imx355->dev);
+
 	mutex_destroy(&imx355->mutex);
 }
 

-- 
2.34.1