v4l_printk_ioctl(9)

🎀 v4l_printk_ioctl(9) 🎀

okay so this is the Kernel API Manual entry for v4l_printk_ioctl(9), and bestie, it's a tiny little helper with main-character energy. It prints an ioctl in a human-readable format, and we're gonna get into every detail. no cap. 💅

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🌸 NAME 🌸

v4l_printk_ioctl — an ancillary routine that prints the ioctl in a human-readable format.

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✨ SYNOPSIS ✨

void v4l_printk_ioctl (const char *prefix , unsigned int cmd );

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💖 ARGUMENTS 💖

• prefix — the prefix that gets added at the ioctl prints. 🎀
• cmd — the ioctl name. 🦋

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🦋 DESCRIPTION 🦋

So the whole vibe is: this routine prints the ioctl in a human-readable format. That's the job. It shows up, it makes the ioctl print make sense, it leaves. iconic behavior, honestly. ✨

NOTE: if prefix != NULL, then it will issue a printk(KERN_DEBUG "s: ", prefix) first. That's the literal note, bestie — don't skip it. 💀

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🔥 SEE ALSO 🔥

• Kernel file ./include/media/v4l2-ioctl.h struct v4l2_ioctl_ops(9)
• v4l2_norm_to_name(9)
• v4l2_video_std_frame_period(9)
• v4l2_video_std_construct(9)
• v4l_video_std_enumstd(9)
• var v4l2_field_names(9)
• var v4l2_type_names(9)
• v4l2_compat_ioctl32(9)
• v4l2_kioctl(9)
• video_usercopy(9)
• video_ioctl2(9)

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mwah 💋 source: ./include/media · version: v4l_printk_ioctl(9) · date: October 2026 — that's the cute little sign-off, footer folded and everything. 🫶