On 09/12/2017 03:41 PM, Sakari Ailus wrote:
> This is just like like v4l2_async_notifier_parse_fwnode_endpoints but it
> only parses endpoints on a single port. The behaviour is useful on devices
> that have both sinks and sources, in other words only some of these should
> be parsed.
I think it would be better to merge this patch with the preceding patch. It
does not make a lot of sense to have this separate IMHO.
That said:
Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Regards,
Hans
>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-fwnode.c | 59 ++++++++++++++++++++++++++++++++---
> include/media/v4l2-fwnode.h | 59 +++++++++++++++++++++++++++++++++++
> 2 files changed, 113 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
> index d978f2d714ca..44ee35f6aad5 100644
> --- a/drivers/media/v4l2-core/v4l2-fwnode.c
> +++ b/drivers/media/v4l2-core/v4l2-fwnode.c
> @@ -398,9 +398,9 @@ static int v4l2_async_notifier_fwnode_parse_endpoint(
> return ret == -ENOTCONN ? 0 : ret;
> }
>
> -int v4l2_async_notifier_parse_fwnode_endpoints(
> +static int __v4l2_async_notifier_parse_fwnode_endpoints(
> struct device *dev, struct v4l2_async_notifier *notifier,
> - size_t asd_struct_size,
> + size_t asd_struct_size, unsigned int port, bool has_port,
> int (*parse_endpoint)(struct device *dev,
> struct v4l2_fwnode_endpoint *vep,
> struct v4l2_async_subdev *asd))
> @@ -413,10 +413,25 @@ int v4l2_async_notifier_parse_fwnode_endpoints(
> return -EINVAL;
>
> for (fwnode = NULL; (fwnode = fwnode_graph_get_next_endpoint(
> - dev_fwnode(dev), fwnode)); )
> - if (fwnode_device_is_available(
> + dev_fwnode(dev), fwnode)); ) {
> + if (!fwnode_device_is_available(
> fwnode_graph_get_port_parent(fwnode)))
> - max_subdevs++;
> + continue;
> +
> + if (has_port) {
> + struct fwnode_endpoint ep;
> +
> + ret = fwnode_graph_parse_endpoint(fwnode, &ep);
> + if (ret) {
> + fwnode_handle_put(fwnode);
> + return ret;
> + }
> +
> + if (ep.port != port)
> + continue;
> + }
> + max_subdevs++;
> + }
>
> /* No subdevs to add? Return here. */
> if (max_subdevs == notifier->max_subdevs)
> @@ -437,6 +452,17 @@ int v4l2_async_notifier_parse_fwnode_endpoints(
> break;
> }
>
> + if (has_port) {
> + struct fwnode_endpoint ep;
> +
> + ret = fwnode_graph_parse_endpoint(fwnode, &ep);
> + if (ret)
> + break;
> +
> + if (ep.port != port)
> + continue;
> + }
> +
> ret = v4l2_async_notifier_fwnode_parse_endpoint(
> dev, notifier, fwnode, asd_struct_size, parse_endpoint);
> if (ret < 0)
> @@ -447,8 +473,31 @@ int v4l2_async_notifier_parse_fwnode_endpoints(
>
> return ret;
> }
> +
> +int v4l2_async_notifier_parse_fwnode_endpoints(
> + struct device *dev, struct v4l2_async_notifier *notifier,
> + size_t asd_struct_size,
> + int (*parse_endpoint)(struct device *dev,
> + struct v4l2_fwnode_endpoint *vep,
> + struct v4l2_async_subdev *asd))
> +{
> + return __v4l2_async_notifier_parse_fwnode_endpoints(
> + dev, notifier, asd_struct_size, 0, false, parse_endpoint);
> +}
> EXPORT_SYMBOL_GPL(v4l2_async_notifier_parse_fwnode_endpoints);
>
> +int v4l2_async_notifier_parse_fwnode_endpoints_by_port(
> + struct device *dev, struct v4l2_async_notifier *notifier,
> + size_t asd_struct_size, unsigned int port,
> + int (*parse_endpoint)(struct device *dev,
> + struct v4l2_fwnode_endpoint *vep,
> + struct v4l2_async_subdev *asd))
> +{
> + return __v4l2_async_notifier_parse_fwnode_endpoints(
> + dev, notifier, asd_struct_size, port, true, parse_endpoint);
> +}
> +EXPORT_SYMBOL_GPL(v4l2_async_notifier_parse_fwnode_endpoints_by_port);
> +
> MODULE_LICENSE("GPL");
> MODULE_AUTHOR("Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>");
> MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>");
> diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
> index 31fb77e470fa..b2eed4f33e6a 100644
> --- a/include/media/v4l2-fwnode.h
> +++ b/include/media/v4l2-fwnode.h
> @@ -257,4 +257,63 @@ int v4l2_async_notifier_parse_fwnode_endpoints(
> struct v4l2_fwnode_endpoint *vep,
> struct v4l2_async_subdev *asd));
>
> +/**
> + * v4l2_async_notifier_parse_fwnode_endpoints_by_port - Parse V4L2 fwnode
> + * endpoints of a port in a
> + * device node
> + * @dev: the device the endpoints of which are to be parsed
> + * @notifier: notifier for @dev
> + * @asd_struct_size: size of the driver's async sub-device struct, including
> + * sizeof(struct v4l2_async_subdev). The &struct
> + * v4l2_async_subdev shall be the first member of
> + * the driver's async sub-device struct, i.e. both
> + * begin at the same memory address.
> + * @port: port number where endpoints are to be parsed
> + * @parse_endpoint: Driver's callback function called on each V4L2 fwnode
> + * endpoint. Optional.
> + * Return: %0 on success
> + * %-ENOTCONN if the endpoint is to be skipped but this
> + * should not be considered as an error
> + * %-EINVAL if the endpoint configuration is invalid
> + *
> + * This function is just like @v4l2_async_notifier_parse_fwnode_endpoints with
> + * the exception that it only parses endpoints in a given port.
> + *
> + * Parse the fwnode endpoints of the @dev device on a given @port and populate
> + * the async sub-devices array of the notifier. The @parse_endpoint callback
> + * function is called for each endpoint with the corresponding async sub-device
> + * pointer to let the caller initialize the driver-specific part of the async
> + * sub-device structure.
> + *
> + * The notifier memory shall be zeroed before this function is called on the
> + * notifier.
> + *
> + * This function may not be called on a registered notifier and may be called on
> + * a notifier only once, per port.
> + *
> + * Do not change the notifier's subdevs array, take references to the subdevs
> + * array itself or change the notifier's num_subdevs field. This is because this
> + * function allocates and reallocates the subdevs array based on parsing
> + * endpoints.
> + *
> + * The @struct v4l2_fwnode_endpoint passed to the callback function
> + * @parse_endpoint is released once the function is finished. If there is a need
> + * to retain that configuration, the user needs to allocate memory for it.
> + *
> + * Any notifier populated using this function must be released with a call to
> + * v4l2_async_notifier_release() after it has been unregistered and the async
> + * sub-devices are no longer in use, even if the function returned an error.
> + *
> + * Return: %0 on success, including when no async sub-devices are found
> + * %-ENOMEM if memory allocation failed
> + * %-EINVAL if graph or endpoint parsing failed
> + * Other error codes as returned by @parse_endpoint
> + */
> +int v4l2_async_notifier_parse_fwnode_endpoints_by_port(
> + struct device *dev, struct v4l2_async_notifier *notifier,
> + size_t asd_struct_size, unsigned int port,
> + int (*parse_endpoint)(struct device *dev,
> + struct v4l2_fwnode_endpoint *vep,
> + struct v4l2_async_subdev *asd));
> +
> #endif /* _V4L2_FWNODE_H */
>
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