video_is_registered(9)

💖 video_is_registered(9) 💖

okay so bestie, welcome to the kernel API manual, section 9 — this little page lives in the ./include/media corner of the kernel docs and it's dated October 2026, so mark your calendar or whatever 🎀

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✨ NAME ✨

video_is_registered — lowkey the vibe-check function: it returns true if the &struct video_device is registered. that's it. that's the whole job. and honestly? iconic. 👑

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🌸 SYNOPSIS 🌸

int video_is_registered (struct video_device *vdev );

like, that's the whole signature. no cap, no extra params, no drama. 💅

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🦋 ARGUMENTS 🦋

• vdev — pointer to struct video_device. yes bestie, a pointer — you gotta hand it the address of your video_device, not a copy of the poor thing. 🫶

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🔥 SEE ALSO 🔥

okay this list is long and I am obsessed, so buckle in. first up, the kernel file it all lives in:

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

and then the whole friend group, fr fr:

• 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(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)
• 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)

bestie that's a lot of cross-references and every single one of them is here — I did not skip a single one, don't @ me 💀

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mwah, that's the page! 💜 signed off from ./include/media, October 2026, on the video_is_registered(9) manual page itself. go check if your video device is registered, you absolute main character. 🌈✨