media_create_pad_link
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Name

media_create_pad_link — creates a link between two entities.

Synopsis

int media_create_pad_link (struct media_entity * source,
 u16 source_pad,
 struct media_entity * sink,
 u16 sink_pad,
 u32 flags);
 

Arguments

source

pointer to media_entity of the source pad.

source_pad

number of the source pad in the pads array

sink

pointer to media_entity of the sink pad.

sink_pad

number of the sink pad in the pads array.

flags

Link flags, as defined in include/uapi/linux/media.h.

Valid values for flags

A MEDIA_LNK_FL_ENABLED flag indicates that the link is enabled and can be used to transfer media data. When two or more links target a sink pad, only one of them can be enabled at a time.

A MEDIA_LNK_FL_IMMUTABLE flag indicates that the link enabled state can't be modified at runtime. If MEDIA_LNK_FL_IMMUTABLE is set, then MEDIA_LNK_FL_ENABLED must also be set since an immutable link is always enabled.

NOTE

Before calling this function, media_entity_pads_init and media_device_register_entity should be called previously for both ends.

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