[05/13] media: st-mipid02: Use v4l2_async_notifier_add_fwnode_remote_subdev helpers
Commit Message
The use of v4l2_async_notifier_add_subdev is discouraged.
Drivers are instead encouraged to use a helper such as
v4l2_async_notifier_add_fwnode_remote_subdev.
This fixes a misuse of the API, as v4l2_async_notifier_add_subdev
should get a kmalloc'ed struct v4l2_async_subdev,
removing some boilerplate code while at it.
Use the appropriate helper v4l2_async_notifier_add_fwnode_remote_subdev,
which handles the needed setup, instead of open-coding it.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
drivers/media/i2c/st-mipid02.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
Comments
Hi Ezequiel,
On Tue, Jan 12, 2021 at 10:23:31AM -0300, Ezequiel Garcia wrote:
> The use of v4l2_async_notifier_add_subdev is discouraged.
> Drivers are instead encouraged to use a helper such as
> v4l2_async_notifier_add_fwnode_remote_subdev.
>
> This fixes a misuse of the API, as v4l2_async_notifier_add_subdev
> should get a kmalloc'ed struct v4l2_async_subdev,
> removing some boilerplate code while at it.
>
> Use the appropriate helper v4l2_async_notifier_add_fwnode_remote_subdev,
> which handles the needed setup, instead of open-coding it.
>
> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
I don't have hw to test this, but it looks good!
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Thanks
j
> ---
> drivers/media/i2c/st-mipid02.c | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
> index 003ba22334cd..9e04ff02257c 100644
> --- a/drivers/media/i2c/st-mipid02.c
> +++ b/drivers/media/i2c/st-mipid02.c
> @@ -92,7 +92,6 @@ struct mipid02_dev {
> u64 link_frequency;
> struct v4l2_fwnode_endpoint tx;
> /* remote source */
> - struct v4l2_async_subdev asd;
> struct v4l2_async_notifier notifier;
> struct v4l2_subdev *s_subdev;
> /* registers */
> @@ -844,6 +843,7 @@ static int mipid02_parse_rx_ep(struct mipid02_dev *bridge)
> {
> struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY };
> struct i2c_client *client = bridge->i2c_client;
> + struct v4l2_async_subdev *asd;
> struct device_node *ep_node;
> int ret;
>
> @@ -875,17 +875,17 @@ static int mipid02_parse_rx_ep(struct mipid02_dev *bridge)
> bridge->rx = ep;
>
> /* register async notifier so we get noticed when sensor is connected */
> - bridge->asd.match.fwnode =
> - fwnode_graph_get_remote_port_parent(of_fwnode_handle(ep_node));
> - bridge->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
> + v4l2_async_notifier_init(&bridge->notifier);
> + asd = v4l2_async_notifier_add_fwnode_remote_subdev(
> + &bridge->notifier,
> + of_fwnode_handle(ep_node),
> + sizeof(*asd));
> of_node_put(ep_node);
>
> - v4l2_async_notifier_init(&bridge->notifier);
> - ret = v4l2_async_notifier_add_subdev(&bridge->notifier, &bridge->asd);
> - if (ret) {
> + if (IS_ERR(asd)) {
> + ret = PTR_ERR(asd);
> dev_err(&client->dev, "fail to register asd to notifier %d",
> ret);
> - fwnode_handle_put(bridge->asd.match.fwnode);
> return ret;
> }
> bridge->notifier.ops = &mipid02_notifier_ops;
> --
> 2.29.2
>
@@ -92,7 +92,6 @@ struct mipid02_dev {
u64 link_frequency;
struct v4l2_fwnode_endpoint tx;
/* remote source */
- struct v4l2_async_subdev asd;
struct v4l2_async_notifier notifier;
struct v4l2_subdev *s_subdev;
/* registers */
@@ -844,6 +843,7 @@ static int mipid02_parse_rx_ep(struct mipid02_dev *bridge)
{
struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY };
struct i2c_client *client = bridge->i2c_client;
+ struct v4l2_async_subdev *asd;
struct device_node *ep_node;
int ret;
@@ -875,17 +875,17 @@ static int mipid02_parse_rx_ep(struct mipid02_dev *bridge)
bridge->rx = ep;
/* register async notifier so we get noticed when sensor is connected */
- bridge->asd.match.fwnode =
- fwnode_graph_get_remote_port_parent(of_fwnode_handle(ep_node));
- bridge->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
+ v4l2_async_notifier_init(&bridge->notifier);
+ asd = v4l2_async_notifier_add_fwnode_remote_subdev(
+ &bridge->notifier,
+ of_fwnode_handle(ep_node),
+ sizeof(*asd));
of_node_put(ep_node);
- v4l2_async_notifier_init(&bridge->notifier);
- ret = v4l2_async_notifier_add_subdev(&bridge->notifier, &bridge->asd);
- if (ret) {
+ if (IS_ERR(asd)) {
+ ret = PTR_ERR(asd);
dev_err(&client->dev, "fail to register asd to notifier %d",
ret);
- fwnode_handle_put(bridge->asd.match.fwnode);
return ret;
}
bridge->notifier.ops = &mipid02_notifier_ops;