v4l2_subdev_unlock_states(9)

💅 v4l2_subdev_unlock_states(9) — like, the Kernel API Manual bestie ✨

okay so buckle up 🎀 you're reading a page from the Kernel API Manual, and this one's about letting go of locks — but like, two of them at once. main character energy fr fr 🦋

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✨ NAME ✨

v4l2_subdev_unlock_states — Unlock two sub-device states 🔓🔓

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🌸 SYNOPSIS 🌸

void v4l2_subdev_unlock_states (struct v4l2_subdev_state *state1 ,
struct v4l2_subdev_state *state2 );

so it returns void, meaning no little return value to obsess over 💜 — you call it, it does the thing, you move on. iconic.

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🎀 ARGUMENTS 🎀

• state1 — One subdevice state. that's it, that's the one 🫶
• state2 — The other subdevice state. yes the other one, we love a duo 👑

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💖 DESCRIPTION 💖

Unlocks the state of two sub-devices. literally just unlock unlock, done ✨

but here's the tea ☕ and it's the whole reason this function exists: it is not the same as calling v4l2_subdev_unlock_state on both states separately. the way that it differs is that if the states share the same lock, the lock is released only once 💀 imagine unlocking twice and the second one causing chaos — no ma'am, not on this function's watch. so if they're twins sharing one lock, it lets go exactly one time. periodt. 🔥

bestie pls don't just double-call v4l2_subdev_unlock_state and think you ate — that's the trap this function is here to save you from 🙈

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🦋 SEE ALSO 🦋

everything and everyone in the v4l2 cinematic universe, iykyk 🌈 — starting with the kernel file and its struct, then the whole extended friend group:

• 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_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_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)

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and that's the whole page bestie 🫶 go forth and unlock responsibly 💅

super cute sign-off time 🎀 this page lives out of ./include/media, it's dated October 2026, and it's part of the Kernel API Manual — the same glow-up energy as v4l2_subdev_unlock_states(9), no cap 🌸✨