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media: v4l: async, fwnode: Improve module organisation

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The V4L2 async framework is generally used with the V4L2 fwnode, which
also depends on the former. There are a few exceptions but they are
relatively few.

At the same time there is a vast number of systems that need videodev
module, but have no use for v4l2-async that's now part of videodev.

In order to improve, split the v4l2-async into its own module. Selecting
V4L2_FWNODE also selects V4L2_ASYNC.

This also moves the initialisation of the debufs entries for async subdevs
to loading of the v4l2-async module. The directory is named as
"v4l2-async".

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Sakari Ailus 2021-03-05 18:38:39 +01:00 • committed by Mauro Carvalho Chehab
parent 1cb1361373
commit ff3cc65cad
5 changed files with 40 additions and 9 deletions
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23
drivers/media/v4l2-core/v4l2-async.c
View file

@ -854,8 +854,27 @@ static int pending_subdevs_show(struct seq_file *s, void *data)
}
DEFINE_SHOW_ATTRIBUTE(pending_subdevs);
void v4l2_async_debug_init(struct dentry *debugfs_dir)
static struct dentry *v4l2_async_debugfs_dir;
static int __init v4l2_async_init(void)
{
debugfs_create_file("pending_async_subdevices", 0444, debugfs_dir, NULL,
v4l2_async_debugfs_dir = debugfs_create_dir("v4l2-async", NULL);
debugfs_create_file("pending_async_subdevices", 0444,
v4l2_async_debugfs_dir, NULL,
&pending_subdevs_fops);
return 0;
}
static void __exit v4l2_async_exit(void)
{
debugfs_remove_recursive(v4l2_async_debugfs_dir);
}
subsys_initcall(v4l2_async_init);
module_exit(v4l2_async_exit);
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>");
MODULE_AUTHOR("Ezequiel Garcia <ezequiel@collabora.com>");
MODULE_LICENSE("GPL");