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media: v4l2: async: Add convenience functions to allocate and add asd's

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Add these convenience functions, which allocate an asd of match type
fwnode, i2c, or device-name, of size asd_struct_size, and then adds
them to the notifier asd_list.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Steve Longerbeam
2018-09-29 15:54:07 -04:00
committed by Mauro Carvalho Chehab
parent b47d7ff1ae
commit 23989b43f1
2 changed files with 138 additions and 0 deletions
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76
drivers/media/v4l2-core/v4l2-async.c
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@@ -650,6 +650,82 @@ unlock:
}
EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_subdev);
struct v4l2_async_subdev *
v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
struct fwnode_handle *fwnode,
unsigned int asd_struct_size)
{
struct v4l2_async_subdev *asd;
int ret;
asd = kzalloc(asd_struct_size, GFP_KERNEL);
if (!asd)
return ERR_PTR(-ENOMEM);
asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
asd->match.fwnode = fwnode;
ret = v4l2_async_notifier_add_subdev(notifier, asd);
if (ret) {
kfree(asd);
return ERR_PTR(ret);
}
return asd;
}
EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_fwnode_subdev);
struct v4l2_async_subdev *
v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
int adapter_id, unsigned short address,
unsigned int asd_struct_size)
{
struct v4l2_async_subdev *asd;
int ret;
asd = kzalloc(asd_struct_size, GFP_KERNEL);
if (!asd)
return ERR_PTR(-ENOMEM);
asd->match_type = V4L2_ASYNC_MATCH_I2C;
asd->match.i2c.adapter_id = adapter_id;
asd->match.i2c.address = address;
ret = v4l2_async_notifier_add_subdev(notifier, asd);
if (ret) {
kfree(asd);
return ERR_PTR(ret);
}
return asd;
}
EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_i2c_subdev);
struct v4l2_async_subdev *
v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier,
const char *device_name,
unsigned int asd_struct_size)
{
struct v4l2_async_subdev *asd;
int ret;
asd = kzalloc(asd_struct_size, GFP_KERNEL);
if (!asd)
return ERR_PTR(-ENOMEM);
asd->match_type = V4L2_ASYNC_MATCH_DEVNAME;
asd->match.device_name = device_name;
ret = v4l2_async_notifier_add_subdev(notifier, asd);
if (ret) {
kfree(asd);
return ERR_PTR(ret);
}
return asd;
}
EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_devname_subdev);
int v4l2_async_register_subdev(struct v4l2_subdev *sd)
{
struct v4l2_async_notifier *subdev_notifier;