| Message ID | 20220831141357.1396081-22-tomi.valkeinen@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v14,01/34] media: Documentation: mc: add definitions for stream and pipeline | expand |
Moi, On Wed, Aug 31, 2022 at 05:13:44PM +0300, Tomi Valkeinen wrote: > 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> > --- > drivers/media/v4l2-core/v4l2-subdev.c | 31 +++++++++++++++++++++++++++ > include/media/v4l2-subdev.h | 17 +++++++++++++++ > 2 files changed, 48 insertions(+) > > diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c > index af1f53d99507..1ce9a7dc0c6e 100644 > --- a/drivers/media/v4l2-core/v4l2-subdev.c > +++ b/drivers/media/v4l2-core/v4l2-subdev.c > @@ -1045,6 +1045,37 @@ 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; > + unsigned int i; > + struct v4l2_subdev_state *state; Please declare i after state. > + > + 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) > diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h > index f38943932cfe..2d1509556ce0 100644 > --- a/include/media/v4l2-subdev.h > +++ b/include/media/v4l2-subdev.h > @@ -1235,6 +1235,23 @@ int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, > */ > int v4l2_subdev_link_validate(struct media_link *link); > > +/** > + * v4l2_subdev_has_pad_interdep - MC has_pad_interdep implementation for subdevs > + * > + * @entity: pointer to &struct media_entity > + * @pad0: pad number for the first pad > + * @pad1: pad number for the second pad > + * > + * This function is an implementation of the media_entity_operations.has_pad_interdep Please run $ scripts/checkpatch.pl --strict --max-line-length=80 on this. > + * operation for subdevs that implement the multiplexed streams API (as > + * indicated by the V4L2_SUBDEV_FL_STREAMS subdev flag). > + * > + * It considers two pads interdependent if there is an active route between pad0 > + * and pad1. > + */ > +bool v4l2_subdev_has_pad_interdep(struct media_entity *entity, > + unsigned int pad0, unsigned int pad1); > + > /** > * __v4l2_subdev_state_alloc - allocate v4l2_subdev_state > *
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index af1f53d99507..1ce9a7dc0c6e 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1045,6 +1045,37 @@ 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; + unsigned int i; + struct v4l2_subdev_state *state; + + 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) diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index f38943932cfe..2d1509556ce0 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1235,6 +1235,23 @@ int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, */ int v4l2_subdev_link_validate(struct media_link *link); +/** + * v4l2_subdev_has_pad_interdep - MC has_pad_interdep implementation for subdevs + * + * @entity: pointer to &struct media_entity + * @pad0: pad number for the first pad + * @pad1: pad number for the second pad + * + * This function is an implementation of the media_entity_operations.has_pad_interdep + * operation for subdevs that implement the multiplexed streams API (as + * indicated by the V4L2_SUBDEV_FL_STREAMS subdev flag). + * + * It considers two pads interdependent if there is an active route between pad0 + * and pad1. + */ +bool v4l2_subdev_has_pad_interdep(struct media_entity *entity, + unsigned int pad0, unsigned int pad1); + /** * __v4l2_subdev_state_alloc - allocate v4l2_subdev_state *
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> --- drivers/media/v4l2-core/v4l2-subdev.c | 31 +++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 17 +++++++++++++++ 2 files changed, 48 insertions(+)