v4l2_subdev_...pad_interdep(9)

💅 v4l2_subdev_has_pad_interdep 💅

okay bestie, welcome to the Kernel API Manual entry for v4l2_subdev_...pad_interdep(9) — yes the title is abridged with dots, that's just how it's printed, no cap. this is the whole vibe, let's go ✨

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🌸 NAME 🌸

v4l2_subdev_has_pad_interdep — literally the MC has_pad_interdep implementation for subdevs. that's it, that's the name 🎀

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🦋 SYNOPSIS 🦋

bool v4l2_subdev_has_pad_interdep (struct media_entity *entity ,
unsigned int pad0 , unsigned int pad1 );

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💖 ARGUMENTS 💖

• entity — pointer to struct media_entity. it's giving "here's the entity we're checking", iconic.
• pad0 — pad number for the first pad. the first one. the main character of the two 🫶
• pad1 — pad number for the second pad. the other one. also important.

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👑 DESCRIPTION 👑

okay so here's the tea 🍓 — this function is an implementation of the media_entity_operations.has_pad_interdep operation, specifically for subdevs that implement the multiplexed streams API. and how do you know a subdev is in that club? it's indicated by the V4L2_SUBDEV_FL_STREAMS subdev flag. iykyk 💅

and what does it actually do? simple, bestie: it considers two pads interdependent if there is an active route between pad0 and pad1. that's the whole vibe check — active route = interdependent, periodt. ✨

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🔥 SEE ALSO 🔥

start with the kernel file, obviously:

• Kernel file ./include/media/v4l2-subdev.h

then the whole extended friend group 🌈 — every single one, in order, because we do not skip anyone:

• struct v4l2_decode_vbi_line(9)
• enum v4l2_subdev_io_pin_bits(9)
• struct v4l2_subdev_io_pin_config(9)
• struct v4l2_subdev_core_ops(9)
• struct v4l2_subdev_tuner_ops(9)
• struct v4l2_subdev_audio_ops(9)
• struct v4l2_mbus_frame_desc_entry_csi2(9)
• enum v4l2_mbus_frame_desc_flags(9)
• struct v4l2_mbus_frame_desc_entry(9)
• enum v4l2_mbus_frame_desc_type(9)
• struct v4l2_mbus_frame_desc(9)
• enum v4l2_subdev_pre_streamon_flags(9)
• struct v4l2_subdev_video_ops(9)
• struct v4l2_subdev_vbi_ops(9)
• struct v4l2_subdev_sensor_ops(9)
• enum v4l2_subdev_ir_mode(9)
• struct v4l2_subdev_ir_parameters(9)
• struct v4l2_subdev_ir_ops(9)
• struct v4l2_subdev_pad_config(9)
• struct v4l2_subdev_stream_configs(9)
• struct v4l2_subdev_krouting(9)
• struct v4l2_subdev_state(9)
• struct v4l2_subdev_pad_ops(9)
• struct v4l2_subdev_ops(9)
• struct v4l2_subdev_internal_ops(9)
• struct v4l2_subdev_platform_data(9)
• struct v4l2_subdev(9)
• media_entity_to_v4l2_subdev(9)
• vdev_to_v4l2_subdev(9)
• struct v4l2_subdev_fh(9)
• to_v4l2_subdev_fh(9)
• v4l2_set_subdevdata(9)
• v4l2_get_subdevdata(9)
• v4l2_set_subdev_hostdata(9)
• v4l2_get_subdev_hostdata(9)
• v4l2_subdev_get_fwnode_pad_1_to_1(9)
• v4l2_subdev_link_validate_default(9)
• v4l2_subdev_link_validate(9)
• __v4l2_subdev_state_alloc(9)
• __v4l2_subdev_state_free(9)
• v4l2_subdev_init_finalize(9)
• v4l2_subdev_cleanup(9)
• v4l2_subdev_state_get_format(9)
• v4l2_subdev_state_get_crop(9)
• v4l2_subdev_state_get_compose(9)
• v4l2_subdev_state_get_interval(9)
• v4l2_subdev_get_fmt(9)
• v4l2_subdev_get_frame_interval(9)
• v4l2_subdev_set_routing(9)
• for_each_active_route(9)
• v4l2_subdev_set_routing_with_fmt(9)
• v4l2_subdev_routing_find_opposite_end(9)
• v4l2_subdev_state_get_opposite_stream_format(9)
• v4l2_subdev_state_xlate_streams(9)
• enum v4l2_subdev_routing_restriction(9)
• v4l2_subdev_routing_validate(9)
• v4l2_subdev_enable_streams(9)
• v4l2_subdev_disable_streams(9)
• v4l2_subdev_s_stream_helper(9)
• __v4l2_subdev_get_frame_desc_passthrough(9)
• v4l2_subdev_get_frame_desc_passthrough(9)
• v4l2_subdev_lock_state(9)
• v4l2_subdev_unlock_state(9)
• v4l2_subdev_lock_states(9)
• v4l2_subdev_unlock_states(9)
• v4l2_subdev_get_unlocked_active_state(9)
• v4l2_subdev_get_locked_active_state(9)
• v4l2_subdev_lock_and_get_active_state(9)
• v4l2_subdev_init(9)
• v4l2_subdev_call(9)
• v4l2_subdev_call_state_active(9)
• v4l2_subdev_call_state_try(9)
• v4l2_subdev_has_op(9)
• v4l2_subdev_notify_event(9)
• v4l2_subdev_is_streaming(9)

like, that's a lot of friends but we love them all 💜

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🧚 tiny reminder bestie: this one only makes sense for subdevs using the multiplexed streams API, flagged by V4L2_SUBDEV_FL_STREAMS. if your subdev isn't in that club, this function's whole personality doesn't apply. keep that in mind fr fr 💀

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and that's a wrap, babe 🎀 this page lives under ./include/media and it's dated October 2026, rocking the v4l2_subdev_...pad_interdep(9) manual name all the way through. slay, go read some v4l2_subdev docs now ✨💖