video_register_device(9)

💖 video_register_device(9) 💖

okay so bestie, welcome to the Kernel API Manual page for video_register_device ✨ buckle up, this one's short but it has ✨lore✨

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🌸 NAME 🌸

video_register_device — register video4linux devices 🎥💅

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🦋 SYNOPSIS 🦋

int video_register_device (struct video_device *vdev , enum
vfl_devnode_type type , int nr );

like, that's the whole vibe. int in, registration out, slay 🫶

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🎀 ARGUMENTS 🎀

• vdev — the struct video_device you want to register. this is your main character struct, okurrr 👑
• type — what kind of device you're registering, as defined by enum vfl_devnode_type. pick your fighter wisely 🧚
• nr — which device node number you're manifesting: 0 == /dev/video0, 1 == /dev/video1, ..., and -1 == first free. lowkey -1 is the "you pick, universe" option ✨🙈

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💜 DESCRIPTION 💜

so internally? it calls __video_register_device. that's it, that's the plot. please see its documentation for more details, because this one is just the friendly front desk 🫶

NOTE: if video_register_device fails, the release callback of the struct video_device structure is *not* called 😭 so the caller is responsible for freeing any data. usually that means video_device_release should be called on failure. no cap, don't forget this part or you WILL leak, and leaking is not giving main character energy 💀

literally remember: failure = you clean up. the kernel is not doing it for you, bestie 🧹✨

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🌈 SEE ALSO 🌈

Kernel file ./include/media/v4l2-dev.h and also, like, the entire extended universe:

• enum vfl_devnode_type(9)
• enum vfl_devnode_direction(9)
• enum v4l2_video_device_flags(9)
• struct v4l2_prio_state(9)
• v4l2_prio_init(9)
• v4l2_prio_change(9)
• v4l2_prio_open(9)
• v4l2_prio_close(9)
• v4l2_prio_max(9)
• v4l2_prio_check(9)
• struct v4l2_file_operations(9)
• struct video_device(9)
• media_entity_to_video_device(9)
• to_video_device(9)
• __video_register_device(9)
• video_register_device_no_warn(9)
• video_unregister_device(9)
• video_device_alloc(9)
• video_device_release(9)
• video_device_release_empty(9)
• v4l2_disable_ioctl(9)
• video_get_drvdata(9)
• video_set_drvdata(9)
• video_devdata(9)
• video_drvdata(9)
• video_device_node_name(9)
• video_is_registered(9)
• v4l2_debugfs_root(9)
• video_device_pipeline_start(9)
• __video_device_pipeline_start(9)
• video_device_pipeline_stop(9)
• __video_device_pipeline_stop(9)
• video_device_pipeline_alloc_start(9)
• video_device_pipeline(9)

like yes that's a lot of cross-references but that's the friend group, we travel together 💅🔥

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and that's the page!! 🎀 this gem lives in ./include/media, and the version/date energy is October 2026 — so yes, this manual page is from the future, and it ate. periodt. 🦋💖⭐