On 09/12/2017 03:41 PM, Sakari Ailus wrote:
> From: Pavel Machek <pa...@ucw.cz>
>
> Parse async sub-devices by using
> v4l2_subdev_fwnode_reference_parse_sensor_common().
>
> These types devices aren't directly related to the sensor, but are
> nevertheless handled by the et8ek8 driver due to the relationship of these
> component to the main part of the camera module --- the sensor.
>
> [Sakari Ailus: Rename fwnode function, check for ret < 0 only.]
> Signed-off-by: Pavel Machek <pa...@ucw.cz>
> Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Acked-by: Hans Verkuil <hans.verk...@cisco.com>
Regards,
Hans
> ---
> drivers/media/i2c/et8ek8/et8ek8_driver.c | 21 ++++++++++++++++++++-
> 1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/et8ek8/et8ek8_driver.c
> b/drivers/media/i2c/et8ek8/et8ek8_driver.c
> index c14f0fd6ded3..0ef1b8025935 100644
> --- a/drivers/media/i2c/et8ek8/et8ek8_driver.c
> +++ b/drivers/media/i2c/et8ek8/et8ek8_driver.c
> @@ -34,10 +34,12 @@
> #include <linux/sort.h>
> #include <linux/v4l2-mediabus.h>
>
> +#include <media/v4l2-async.h>
> #include <media/media-entity.h>
> #include <media/v4l2-ctrls.h>
> #include <media/v4l2-device.h>
> #include <media/v4l2-subdev.h>
> +#include <media/v4l2-fwnode.h>
>
> #include "et8ek8_reg.h"
>
> @@ -46,6 +48,7 @@
> #define ET8EK8_MAX_MSG 8
>
> struct et8ek8_sensor {
> + struct v4l2_async_notifier notifier;
> struct v4l2_subdev subdev;
> struct media_pad pad;
> struct v4l2_mbus_framefmt format;
> @@ -1446,6 +1449,11 @@ static int et8ek8_probe(struct i2c_client *client,
> sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> sensor->subdev.internal_ops = &et8ek8_internal_ops;
>
> + ret = v4l2_async_notifier_parse_fwnode_sensor_common(
> + &client->dev, &sensor->notifier);
> + if (ret < 0)
> + goto err_release;
> +
> sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
> ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad);
> if (ret < 0) {
> @@ -1453,18 +1461,27 @@ static int et8ek8_probe(struct i2c_client *client,
> goto err_mutex;
> }
>
> + ret = v4l2_async_subdev_notifier_register(&sensor->subdev,
> + &sensor->notifier);
> + if (ret)
> + goto err_entity;
> +
> ret = v4l2_async_register_subdev(&sensor->subdev);
> if (ret < 0)
> - goto err_entity;
> + goto err_async;
>
> dev_dbg(dev, "initialized!\n");
>
> return 0;
>
> +err_async:
> + v4l2_async_notifier_unregister(&sensor->notifier);
> err_entity:
> media_entity_cleanup(&sensor->subdev.entity);
> err_mutex:
> mutex_destroy(&sensor->power_lock);
> +err_release:
> + v4l2_async_notifier_release(&sensor->notifier);
> return ret;
> }
>
> @@ -1480,6 +1497,8 @@ static int __exit et8ek8_remove(struct i2c_client
> *client)
> }
>
> v4l2_device_unregister_subdev(&sensor->subdev);
> + v4l2_async_notifier_unregister(&sensor->notifier);
> + v4l2_async_notifier_release(&sensor->notifier);
> device_remove_file(&client->dev, &dev_attr_priv_mem);
> v4l2_ctrl_handler_free(&sensor->ctrl_handler);
> v4l2_async_unregister_subdev(&sensor->subdev);
>
