__v4l2_subdev_state_free(9)

💖 __v4l2_subdev_state_free 💖

okay so real talk — this is a page from the Kernel API Manual, and it's about one (1) little function with a big job: freeing a v4l2_subdev_state. that's it. that's the whole vibe. but she's important, so let's get into it 🫶

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✨ NAME ✨

__v4l2_subdev_state_free — free a v4l2_subdev_state 🎀

like literally what it says on the tin bestie. it frees the state. no cap.

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🌸 SYNOPSIS 🌸

void __v4l2_subdev_state_free (struct v4l2_subdev_state *state );

so it returns void (nothing comes back, it's giving silent and mysterious 💅) and it takes exactly one thing:

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🦋 ARGUMENTS 🦋

• state — the v4l2_subdev_state that's getting freed. that's the one. she's the main character of this function call ✨

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⭐ DESCRIPTION ⭐

okay so listen — not to be called directly by the drivers. 🚨

that's it, that's the entire description, and honestly it's the whole personality of this page. this function is internal. it's not for you, it's not for me, it's not for your driver — some other part of the kernel calls it, and drivers are supposed to keep their hands to themselves 🙈

like, the audacity of a __-prefixed function to tell you not to call it, and yet — respect. she knows her boundaries. 👑

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🔥 SEE ALSO 🔥

okay this list is long long, so buckle up bestie, we're going on a little tour of the entire subdev header 🌈 and every single one of these is right here, nothing skipped, fr fr:

• the Kernel file ./include/media/v4l2-subdev.h 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_has_pad_interdep(9)
• __v4l2_subdev_state_alloc(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)

ngl the way this SEE ALSO section just keeps going — it ate and left no crumbs 🍓 and yes, if you're wondering, that's every last one of them. iykyk 💜

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🧚 sign-off 🧚

this little page lives in ./include/media, and it's dated October 2026 — marking it in your calendar as we speak 📅✨ she's part of the Kernel API Manual and yes she's short, but she's iconic, and honestly? she did what needed to be done. slay. periodt. 🌈💅