kernel/include/media/v4l2-async.h, branch 0x221E-v0.0.1-v6.19

media: v4l: async: Set owner for async sub-devices

2024-04-26T10:31:19Z

Set the owner field of the async sub-devices by making v4l2_async_register_subdev() a macro and obtaining THIS_MODULE that way. Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Set v4l2_device and subdev in async notifier init

2023-08-10T05:58:32Z

Set the v4l2_device already in async notifier init, so struct device related to it will be available before the notifier is registered. This requires separating notifier initialisation into two functions, one that takes v4l2_device as its argument, v4l2_async_nf_init and v4l2_async_subdev_nf_init, for sub-device notifiers. Registering the notifier will use a single function, v4l2_async_nf_register. This is done in order to make struct device available earlier, during construction of the async connections, for sensible debug prints. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Support fwnode endpoint list matching for subdevs

2023-07-28T08:53:41Z

Support matching V4L2 async sub-devices based on particular fwnode endpoint. This makes it possible to instantiate multiple V4L2 sub-devices based on given fwnode endpoints from a single device, based on driver needs. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Allow multiple connections between entities

2023-07-28T08:48:49Z

When the v4l2-async framework was introduced, the use case for it was to connect a camera sensor with a parallel receiver. Both tended to be rather simple devices with a single connection between them. The framework has been since improved in multiple ways but there are limitations that have remained, for instance the assumption an async sub-device is connected towards a single notifier and via a single link only. This patch enables connecting a sub-device to one or more notifiers simultaneously, with one or more connections per notifier. The notifier information is moved from the sub-device to the connection and the connections in sub-device are no longer a pointer but a linked list. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Obtain async connection based on sub-device

2023-07-28T08:47:56Z

Add v4l2_async_connection_unique() function for obtaining a struct v4l2_async_connection, typically allocated by drivers together with their own information on an external sub-device. The relation between connections and sub-devices still remains 1:1 but this code becomes more complex when the relation soon changes. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Rework internal lists

2023-07-28T08:46:32Z

This patch re-arranges internal V4L2 async lists for preparation of supporting multiple connections per sub-device as well as cleaning up used lists. The list of unbound V4L2 sub-devices shall be maintained for the purpose of listing those sub-devices only, not for their bindin status. Also, the V4L2 async connections now have, instead of two list entries, a single list entry in the notifier's list, be that either waiting or done lists, while the notifier's asc_list is removed. The one-to-one relation between a sub-device and a connection is still maintained in this patch. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Rename v4l2_async_subdev as v4l2_async_connection

2023-07-28T08:44:25Z

Rename v4l2_async_subdev as v4l2_async_connection, in order to differentiate between the sub-devices and their connections: one sub-device can have many connections but the V4L2 async framework has so far allowed just a single one. Connections in this context will later translate into either MC ancillary or data links. This patch prepares changing that relation by changing existing users of v4l2_async_subdev to switch to v4l2_async_connection. Async sub-devices themselves will not be needed anymore Additionally, __v4l2_async_nf_add_subdev() has been renamed __v4l2_async_nf_add_connection(). Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Clean up list heads and entries

2023-07-28T08:42:20Z

The naming of list heads and list entries is confusing as they're named similarly. Use _list for list head and _entry for list entries. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Rename V4L2_ASYNC_MATCH_ macros, add TYPE_

2023-07-28T08:40:45Z

The async match type is a struct field now, rename V4L2_ASYNC_MATCH_* macros as V4L2_ASYNC_MATCH_TYPE_* instead. This patch has been produced by: git grep -l V4L2_ASYNC_MATCH_ -- drivers/media/ drivers/staging/media/ \ include/ Documentation/|xargs perl -i -pe \ 's/V4L2_ASYNC_MATCH_\K/TYPE_/g' so it must be correct. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Reviewed-by: Laurent Pinchart Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab

media: v4l: async: Make V4L2 async match information a struct

2023-07-28T08:40:17Z

Make V4L2 async match information a struct, making it easier to use it elsewhere outside the scope of struct v4l2_async_subdev. Also remove an obsolete comment --- none of these fields are supposed to be touched by drivers. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Reviewed-by: Laurent Pinchart Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC Signed-off-by: Mauro Carvalho Chehab