diff options
| author | Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> | 2021-07-15 15:39:19 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-01-22 09:34:51 +0100 |
| commit | 33c0ddbe56905c98b43d7141f2fe67ae69afba3c (patch) | |
| tree | 3f923af797d660f4551ca9e7b132270f56b52324 /drivers/media/v4l2-core/v4l2-subdev.c | |
| parent | 8a54644571fed484d55b3807f25f64cba8a9ca77 (diff) | |
media: subdev: add v4l2_subdev_has_pad_interdep()
Add a v4l2_subdev_has_pad_interdep() helper function which can be used
for media_entity_operations.has_pad_interdep op.
It considers two pads interdependent if there is an active route between
pad0 and pad1.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-subdev.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-subdev.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 6cdb7a89f19c..dd67b4ae61d7 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1073,6 +1073,37 @@ int v4l2_subdev_link_validate(struct media_link *link) } EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate); +bool v4l2_subdev_has_pad_interdep(struct media_entity *entity, + unsigned int pad0, unsigned int pad1) +{ + struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); + struct v4l2_subdev_krouting *routing; + struct v4l2_subdev_state *state; + unsigned int i; + + state = v4l2_subdev_lock_and_get_active_state(sd); + + routing = &state->routing; + + for (i = 0; i < routing->num_routes; ++i) { + struct v4l2_subdev_route *route = &routing->routes[i]; + + if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) + continue; + + if ((route->sink_pad == pad0 && route->source_pad == pad1) || + (route->source_pad == pad0 && route->sink_pad == pad1)) { + v4l2_subdev_unlock_state(state); + return true; + } + } + + v4l2_subdev_unlock_state(state); + + return false; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_has_pad_interdep); + struct v4l2_subdev_state * __v4l2_subdev_state_alloc(struct v4l2_subdev *sd, const char *lock_name, struct lock_class_key *lock_key) |