From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nblzone-211-213.nblnetworks.fi ([83.145.211.213]:47270 "EHLO hillosipuli.retiisi.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932867AbdHVMa1 (ORCPT ); Tue, 22 Aug 2017 08:30:27 -0400 From: Sakari Ailus To: linux-media@vger.kernel.org Cc: niklas.soderlund@ragnatech.se, robh@kernel.org, hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, devicetree@vger.kernel.org Subject: [PATCH v4 3/3] v4l: fwnode: Support generic parsing of graph endpoints in a single port Date: Tue, 22 Aug 2017 15:30:23 +0300 Message-Id: <20170822123023.6149-4-sakari.ailus@linux.intel.com> In-Reply-To: <20170822123023.6149-1-sakari.ailus@linux.intel.com> References: <20170822123023.6149-1-sakari.ailus@linux.intel.com> Sender: linux-media-owner@vger.kernel.org List-ID: This is the preferred way to parse the endpoints. Signed-off-by: Sakari Ailus --- drivers/media/v4l2-core/v4l2-fwnode.c | 51 +++++++++++++++++++++++++++++++++++ include/media/v4l2-fwnode.h | 7 +++++ 2 files changed, 58 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index cb0fc4b4e3bf..961bcdf22d9a 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -508,6 +508,57 @@ int v4l2_fwnode_endpoints_parse( } EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoints_parse); +/** + * v4l2_fwnode_endpoint_parse - Parse V4L2 fwnode endpoints in a port node + * @dev: local struct device + * @notifier: async notifier related to @dev + * @port: port number + * @endpoint: endpoint number + * @asd_struct_size: size of the driver's async sub-device struct, including + * sizeof(struct v4l2_async_subdev) + * @parse_single: driver's callback function called on each V4L2 fwnode endpoint + * + * Parse all V4L2 fwnode endpoints related to a given port. This is + * the preferred interface over v4l2_fwnode_endpoints_parse() and + * should be used by new drivers. + */ +int v4l2_fwnode_endpoint_parse_port( + struct device *dev, struct v4l2_async_notifier *notifier, + unsigned int port, unsigned int endpoint, size_t asd_struct_size, + int (*parse_single)(struct device *dev, + struct v4l2_fwnode_endpoint *vep, + struct v4l2_async_subdev *asd)) +{ + struct fwnode_handle *fwnode; + struct v4l2_async_subdev *asd; + int ret; + + fwnode = fwnode_graph_get_remote_node(dev_fwnode(dev), port, endpoint); + if (!fwnode) + return -ENOENT; + + asd = devm_kzalloc(dev, asd_struct_size, GFP_KERNEL); + if (!asd) + return -ENOMEM; + + ret = notifier_realloc(dev, notifier, notifier->num_subdevs + 1); + if (ret) + goto out_free; + + ret = __v4l2_fwnode_endpoint_parse(dev, notifier, fwnode, asd, + parse_single); + if (ret) + goto out_free; + + return 0; + +out_free: + devm_kfree(dev, asd); + + return ret; +} +EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_parse_port); + MODULE_LICENSE("GPL"); MODULE_AUTHOR("Sakari Ailus "); MODULE_AUTHOR("Sylwester Nawrocki "); diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h index c75a768d4ef7..5adf28e7b070 100644 --- a/include/media/v4l2-fwnode.h +++ b/include/media/v4l2-fwnode.h @@ -131,4 +131,11 @@ int v4l2_fwnode_endpoints_parse( struct v4l2_fwnode_endpoint *vep, struct v4l2_async_subdev *asd)); +int v4l2_fwnode_endpoint_parse_port( + struct device *dev, struct v4l2_async_notifier *notifier, + unsigned int port, unsigned int endpoint, size_t asd_struct_size, + int (*parse_single)(struct device *dev, + struct v4l2_fwnode_endpoint *vep, + struct v4l2_async_subdev *asd)); + #endif /* _V4L2_FWNODE_H */ -- 2.11.0