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Subject: media: Documentation: v4l: Document that link_validate op is valid for sink only Author: Sakari Ailus <[email protected]> Date: Mon Nov 30 14:46:06 2020 +0100 The link_validate pad op will only be called on sink pads. Document this. Signed-off-by: Sakari Ailus <[email protected]> Reviewed-by: Jacopo Mondi <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> Documentation/driver-api/media/v4l2-subdev.rst | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) --- diff --git a/Documentation/driver-api/media/v4l2-subdev.rst b/Documentation/driver-api/media/v4l2-subdev.rst index d4cba0d6c4ca..6d5c799c49fe 100644 --- a/Documentation/driver-api/media/v4l2-subdev.rst +++ b/Documentation/driver-api/media/v4l2-subdev.rst @@ -122,11 +122,12 @@ Don't forget to cleanup the media entity before the sub-device is destroyed: media_entity_cleanup(&sd->entity); -In that case, the subdev driver may set the link_validate field to provide -its own link validation function. The link validation function is called for -every link in the pipeline where both of the ends of the links are V4L2 -sub-devices. The driver is still responsible for validating the correctness -of the format configuration between sub-devices and video nodes. +If a sub-device driver implements sink pads, the subdev driver may set the +link_validate field in :c:type:`v4l2_subdev_pad_ops`to provide its own link +validation function. For every link in the pipeline, the link_validate pad +operation of the sink end of the link is called. In both cases the driver is +still responsible for validating the correctness of the format configuration +between sub-devices and video nodes. If link_validate op is not set, the default function :c:func:`v4l2_subdev_link_validate_default` is used instead. This function _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
