ioctl MEDIA_IOC_SETUP_LINK
&manvol;
MEDIA_IOC_SETUP_LINKModify the properties of a linkint ioctlint fdint requeststruct media_link_desc *argpArgumentsfdFile descriptor returned by
open().requestMEDIA_IOC_SETUP_LINKargpDescriptionTo change link properties applications fill a &media-link-desc; with
link identification information (source and sink pad) and the new requested
link flags. They then call the MEDIA_IOC_SETUP_LINK ioctl with a pointer to
that structure.The only configurable property is the ENABLED
link flag to enable/disable a link. Links marked with the
IMMUTABLE link flag can not be enabled or disabled.
Link configuration has no side effect on other links. If an enabled
link at the sink pad prevents the link from being enabled, the driver
returns with an &EBUSY;.Only links marked with the DYNAMIC link flag can
be enabled/disabled while streaming media data. Attempting to enable or
disable a streaming non-dynamic link will return an &EBUSY;.If the specified link can't be found the driver returns with an
&EINVAL;.
&return-value;
EINVALThe &media-link-desc; references a non-existing link, or the
link is immutable and an attempt to modify its configuration was made.