5680fe45d6
The media_entity_remote_pad_first() helper function returns the first remote pad it finds connected to a given pad. Beside being possibly non-deterministic (as it stops at the first enabled link), the fact that it returns the first match makes it unsuitable for drivers that need to guarantee that a single link is enabled, for instance when an entity can process data from one of multiple sources at a time. For those use cases, add a new helper function, media_entity_remote_pad_unique(), that operates on an entity and returns a remote pad, with a guarantee that only one link is enabled. To ease its use in drivers, also add an inline wrapper that locates source pads specifically. A wrapper that locates sink pads can easily be added when needed. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org> |
||
|---|---|---|
| .. | ||
| drivers | ||
| camera-sensor.rst | ||
| cec-core.rst | ||
| dtv-ca.rst | ||
| dtv-common.rst | ||
| dtv-core.rst | ||
| dtv-demux.rst | ||
| dtv-frontend.rst | ||
| dtv-net.rst | ||
| index.rst | ||
| maintainer-entry-profile.rst | ||
| mc-core.rst | ||
| rc-core.rst | ||
| tx-rx.rst | ||
| v4l2-async.rst | ||
| v4l2-common.rst | ||
| v4l2-controls.rst | ||
| v4l2-core.rst | ||
| v4l2-dev.rst | ||
| v4l2-device.rst | ||
| v4l2-dv-timings.rst | ||
| v4l2-event.rst | ||
| v4l2-fh.rst | ||
| v4l2-flash-led-class.rst | ||
| v4l2-fwnode.rst | ||
| v4l2-intro.rst | ||
| v4l2-mc.rst | ||
| v4l2-mediabus.rst | ||
| v4l2-mem2mem.rst | ||
| v4l2-rect.rst | ||
| v4l2-subdev.rst | ||
| v4l2-tuner.rst | ||
| v4l2-tveeprom.rst | ||
| v4l2-videobuf2.rst | ||
| v4l2-videobuf.rst | ||