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Subject: media: imx355: Enable runtime PM before registering async sub-device Author: Bingbu Cao bingbu.cao@intel.com Date: Wed Nov 22 17:46:06 2023 +0800

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: df0b5c4a7ddd ("media: add imx355 camera 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

drivers/media/i2c/imx355.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)

---

diff --git a/drivers/media/i2c/imx355.c b/drivers/media/i2c/imx355.c index e1b1d2fc79dd..8c995c58743a 100644 --- a/drivers/media/i2c/imx355.c +++ b/drivers/media/i2c/imx355.c @@ -1747,10 +1747,6 @@ static int imx355_probe(struct i2c_client *client) goto error_handler_free; }

- ret = v4l2_async_register_subdev_sensor(&imx355->sd); - if (ret < 0) - goto error_media_entity; - /* * Device is already turned on by i2c-core with ACPI domain PM. * Enable runtime PM and turn off the device. @@ -1759,9 +1755,15 @@ static int imx355_probe(struct i2c_client *client) pm_runtime_enable(&client->dev); pm_runtime_idle(&client->dev);

+ ret = v4l2_async_register_subdev_sensor(&imx355->sd); + if (ret < 0) + goto error_media_entity_runtime_pm; + return 0;

-error_media_entity: +error_media_entity_runtime_pm: + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); media_entity_cleanup(&imx355->sd.entity);

error_handler_free: