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media: ov9734: Enable runtime PM before registering async sub-device

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As the sensor device maybe accessible right after its async sub-device is
registered, such as ipu-bridge will try to power up sensor by sensor's
client device's runtime PM from the async notifier callback, if runtime PM
is not enabled, it will fail.

So runtime PM should be ready before its async sub-device is registered
and accessible by others.

Fixes: d3f863a63f ("media: i2c: Add ov9734 image sensor driver")
Cc: stable@vger.kernel.org
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Bingbu Cao 2023-11-22 17:46:09 +08:00 committed by Hans Verkuil
parent 7b0454cfd8
commit e242e9c144
1 changed files with 11 additions and 8 deletions
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19
drivers/media/i2c/ov9734.c
View file

@ -893,6 +893,7 @@ static void ov9734_remove(struct i2c_client *client)
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(sd->ctrl_handler);
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
mutex_destroy(&ov9734->mutex);
}
@ -938,13 +939,6 @@ static int ov9734_probe(struct i2c_client *client)
goto probe_error_v4l2_ctrl_handler_free;
}
ret = v4l2_async_register_subdev_sensor(&ov9734->sd);
if (ret < 0) {
dev_err(&client->dev, "failed to register V4L2 subdev: %d",
ret);
goto probe_error_media_entity_cleanup;
}
/*
* Device is already turned on by i2c-core with ACPI domain PM.
* Enable runtime PM and turn off the device.
@ -953,9 +947,18 @@ static int ov9734_probe(struct i2c_client *client)
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
ret = v4l2_async_register_subdev_sensor(&ov9734->sd);
if (ret < 0) {
dev_err(&client->dev, "failed to register V4L2 subdev: %d",
ret);
goto probe_error_media_entity_cleanup_pm;
}
return 0;
probe_error_media_entity_cleanup:
probe_error_media_entity_cleanup_pm:
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
media_entity_cleanup(&ov9734->sd.entity);
probe_error_v4l2_ctrl_handler_free: