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drivers: i2c: imx477: Use pm_runtime_use_autosuspend()

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Switch the power management in the imx477 device driver to use auto-
suspend with a 5s timeout.

This improves mode switching time that avoids additional regulator
switch-on delays and common register I2C writes.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
This commit is contained in:
Naushir Patuck
2025-11-03 13:30:40 +00:00
committed by Dom Cobley
parent 2618cc99f4
commit 6efb02ee78
1 changed files with 22 additions and 13 deletions
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35
drivers/media/i2c/imx477.c
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@@ -1268,7 +1268,8 @@ static int imx477_set_ctrl(struct v4l2_ctrl *ctrl)
break;
}
pm_runtime_put(&client->dev);
pm_runtime_mark_last_busy(&client->dev);
pm_runtime_put_autosuspend(&client->dev);
return ret;
}
@@ -1694,22 +1695,23 @@ static int imx477_set_stream(struct v4l2_subdev *sd, int enable)
}
if (enable) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0)
goto err_unlock;
}
/*
* Apply default & customized values
* and then start streaming.
*/
ret = imx477_start_streaming(imx477);
if (ret)
goto err_rpm_put;
if (ret) {
pm_runtime_put_sync(&client->dev);
goto err_unlock;
}
} else {
imx477_stop_streaming(imx477);
pm_runtime_put(&client->dev);
pm_runtime_mark_last_busy(&client->dev);
pm_runtime_put_autosuspend(&client->dev);
}
imx477->streaming = enable;
@@ -1722,8 +1724,6 @@ static int imx477_set_stream(struct v4l2_subdev *sd, int enable)
return ret;
err_rpm_put:
pm_runtime_put(&client->dev);
err_unlock:
mutex_unlock(&imx477->mutex);
@@ -2183,10 +2183,16 @@ static int imx477_probe(struct i2c_client *client)
/* Initialize default format */
imx477_set_default_format(imx477);
/* Enable runtime PM and turn off the device */
/*
* Enable runtime PM with 5s autosuspend. As the device has been powered
* manually, mark it as active, and increase the usage count without
* resuming the device.
*/
pm_runtime_set_active(dev);
pm_runtime_get_noresume(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
pm_runtime_set_autosuspend_delay(dev, 5000);
pm_runtime_use_autosuspend(dev);
/* This needs the pm runtime to be registered. */
ret = imx477_init_controls(imx477);
@@ -2215,6 +2221,9 @@ static int imx477_probe(struct i2c_client *client)
goto error_media_entity;
}
pm_runtime_mark_last_busy(&client->dev);
pm_runtime_put_autosuspend(&client->dev);
return 0;
error_media_entity:
@@ -2225,7 +2234,7 @@ error_handler_free:
error_power_off:
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
imx477_power_off(&client->dev);
return ret;