| Message ID | 20220301161156.1119557-29-tomi.valkeinen@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | v4l: routing and streams support | expand |
Hi Tomi, On Tue, Mar 01, 2022 at 06:11:48PM +0200, Tomi Valkeinen wrote: > Add two helper functions to make dealing with streams easier: > > v4l2_subdev_routing_find_opposite_end - given a routing table and a pad > + stream, return the pad + stream on the opposite side of the subdev. > > v4l2_subdev_state_get_opposite_stream_format - return a pointer to the > format on the pad + stream on the opposite side from the given pad + > stream. > > Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> > Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> > --- > drivers/media/v4l2-core/v4l2-subdev.c | 48 +++++++++++++++++++++++++++ > include/media/v4l2-subdev.h | 36 ++++++++++++++++++++ > 2 files changed, 84 insertions(+) > > diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c > index 091b854e00d0..e65f802fe2aa 100644 > --- a/drivers/media/v4l2-core/v4l2-subdev.c > +++ b/drivers/media/v4l2-core/v4l2-subdev.c > @@ -1459,6 +1459,54 @@ v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, > } > EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_stream_format); > > +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, > + u32 pad, u32 stream, u32 *other_pad, > + u32 *other_stream) > +{ > + unsigned int i; > + > + for (i = 0; i < routing->num_routes; ++i) { > + struct v4l2_subdev_route *route = &routing->routes[i]; > + Is it intentional to include routes that might be active ? If that's the case Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Thanks j > + if (route->source_pad == pad && > + route->source_stream == stream) { > + if (other_pad) > + *other_pad = route->sink_pad; > + if (other_stream) > + *other_stream = route->sink_stream; > + return 0; > + } > + > + if (route->sink_pad == pad && route->sink_stream == stream) { > + if (other_pad) > + *other_pad = route->source_pad; > + if (other_stream) > + *other_stream = route->source_stream; > + return 0; > + } > + } > + > + return -EINVAL; > +} > +EXPORT_SYMBOL_GPL(v4l2_subdev_routing_find_opposite_end); > + > +struct v4l2_mbus_framefmt * > +v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, > + u32 pad, u32 stream) > +{ > + u32 other_pad, other_stream; > + int ret; > + > + ret = v4l2_subdev_routing_find_opposite_end(&state->routing, pad, stream, > + &other_pad, &other_stream); > + if (ret) > + return NULL; > + > + return v4l2_subdev_state_get_stream_format(state, other_pad, > + other_stream); > +} > +EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_opposite_stream_format); > + > #endif /* CONFIG_MEDIA_CONTROLLER */ > > void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) > diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h > index 2a40ad273cf8..ed3fe21637e6 100644 > --- a/include/media/v4l2-subdev.h > +++ b/include/media/v4l2-subdev.h > @@ -1445,6 +1445,42 @@ struct v4l2_mbus_framefmt * > v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, > unsigned int pad, u32 stream); > > +/** > + * v4l2_subdev_routing_find_opposite_end() - Find the opposite stream > + * @routing: routing used to find the opposite side > + * @pad: pad id > + * @stream: stream id > + * @other_pad: pointer used to return the opposite pad > + * @other_stream: pointer used to return the opposite stream > + * > + * This function uses the routing table to find the pad + stream which is > + * opposite the given pad + stream. > + * > + * @other_pad and/or @other_stream can be NULL if the caller does not need the > + * value. > + * > + * Returns 0 on success, or -EINVAL if no matching route is found. > + */ > +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, > + u32 pad, u32 stream, u32 *other_pad, > + u32 *other_stream); > + > +/** > + * v4l2_subdev_state_get_opposite_stream_format() - Get pointer to opposite > + * stream format > + * @state: subdevice state > + * @pad: pad id > + * @stream: stream id > + * > + * This returns a pointer to &struct v4l2_mbus_framefmt for the pad + stream > + * that is opposite the given pad + stream in the subdev state. > + * > + * If the state does not contain the given pad + stream, NULL is returned. > + */ > +struct v4l2_mbus_framefmt * > +v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, > + u32 pad, u32 stream); > + > #endif /* CONFIG_MEDIA_CONTROLLER */ > > /** > -- > 2.25.1 >
On 16/03/2022 12:50, Jacopo Mondi wrote: > Hi Tomi, > > On Tue, Mar 01, 2022 at 06:11:48PM +0200, Tomi Valkeinen wrote: >> Add two helper functions to make dealing with streams easier: >> >> v4l2_subdev_routing_find_opposite_end - given a routing table and a pad >> + stream, return the pad + stream on the opposite side of the subdev. >> >> v4l2_subdev_state_get_opposite_stream_format - return a pointer to the >> format on the pad + stream on the opposite side from the given pad + >> stream. >> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> >> Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> >> --- >> drivers/media/v4l2-core/v4l2-subdev.c | 48 +++++++++++++++++++++++++++ >> include/media/v4l2-subdev.h | 36 ++++++++++++++++++++ >> 2 files changed, 84 insertions(+) >> >> diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c >> index 091b854e00d0..e65f802fe2aa 100644 >> --- a/drivers/media/v4l2-core/v4l2-subdev.c >> +++ b/drivers/media/v4l2-core/v4l2-subdev.c >> @@ -1459,6 +1459,54 @@ v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, >> } >> EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_stream_format); >> >> +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, >> + u32 pad, u32 stream, u32 *other_pad, >> + u32 *other_stream) >> +{ >> + unsigned int i; >> + >> + for (i = 0; i < routing->num_routes; ++i) { >> + struct v4l2_subdev_route *route = &routing->routes[i]; >> + > > Is it intentional to include routes that might be active ? You mean not active? I don't see why this function should only consider active routes. So yes, I guess you could call it intentional. Tomi
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 091b854e00d0..e65f802fe2aa 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1459,6 +1459,54 @@ v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, } EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_stream_format); +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, + u32 pad, u32 stream, u32 *other_pad, + u32 *other_stream) +{ + unsigned int i; + + for (i = 0; i < routing->num_routes; ++i) { + struct v4l2_subdev_route *route = &routing->routes[i]; + + if (route->source_pad == pad && + route->source_stream == stream) { + if (other_pad) + *other_pad = route->sink_pad; + if (other_stream) + *other_stream = route->sink_stream; + return 0; + } + + if (route->sink_pad == pad && route->sink_stream == stream) { + if (other_pad) + *other_pad = route->source_pad; + if (other_stream) + *other_stream = route->source_stream; + return 0; + } + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_routing_find_opposite_end); + +struct v4l2_mbus_framefmt * +v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, + u32 pad, u32 stream) +{ + u32 other_pad, other_stream; + int ret; + + ret = v4l2_subdev_routing_find_opposite_end(&state->routing, pad, stream, + &other_pad, &other_stream); + if (ret) + return NULL; + + return v4l2_subdev_state_get_stream_format(state, other_pad, + other_stream); +} +EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_opposite_stream_format); + #endif /* CONFIG_MEDIA_CONTROLLER */ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 2a40ad273cf8..ed3fe21637e6 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1445,6 +1445,42 @@ struct v4l2_mbus_framefmt * v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, unsigned int pad, u32 stream); +/** + * v4l2_subdev_routing_find_opposite_end() - Find the opposite stream + * @routing: routing used to find the opposite side + * @pad: pad id + * @stream: stream id + * @other_pad: pointer used to return the opposite pad + * @other_stream: pointer used to return the opposite stream + * + * This function uses the routing table to find the pad + stream which is + * opposite the given pad + stream. + * + * @other_pad and/or @other_stream can be NULL if the caller does not need the + * value. + * + * Returns 0 on success, or -EINVAL if no matching route is found. + */ +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, + u32 pad, u32 stream, u32 *other_pad, + u32 *other_stream); + +/** + * v4l2_subdev_state_get_opposite_stream_format() - Get pointer to opposite + * stream format + * @state: subdevice state + * @pad: pad id + * @stream: stream id + * + * This returns a pointer to &struct v4l2_mbus_framefmt for the pad + stream + * that is opposite the given pad + stream in the subdev state. + * + * If the state does not contain the given pad + stream, NULL is returned. + */ +struct v4l2_mbus_framefmt * +v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, + u32 pad, u32 stream); + #endif /* CONFIG_MEDIA_CONTROLLER */ /**