STRUCT V4L2_SUBDEV_FRAME_INTERVAL_ENUM(9)

💅 struct v4l2_subdev_frame_interval_enum(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ — yes, the actual Kernel API Manual, and today's main character is struct v4l2_subdev_frame_interval_enum, which is literally the frame interval enumeration struct. it's giving "i enumerate frame intervals and i do it gorgeously" 🎀

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🌸 NAME 🌸

struct v4l2_subdev_frame_interval_enum — Frame interval enumeration. that's the whole vibe, no cap 💖

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🦋 SYNOPSIS 🦋

struct v4l2_subdev_frame_interval_enum {
    __u32 index;
    __u32 pad;
    __u32 code;
    __u32 width;
    __u32 height;
    struct v4l2_fract interval;
    __u32 which;
    __u32 stream;
    __u32 reserved[7];
 };

like, look at her. she's structured. she's organized. she's an icon 👑

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💅 Members 💅

get into the details, because every single field matters fr fr:

• index — frame interval index during enumeration. literally the number telling you which one you're looking at during the enumeration era 🍓
• pad — pad number, as reported by the media API. not us guessing, the media API said so 💁‍♀️
• code — format code (MEDIA_BUS_FMT_ definitions). keep it exact bestie, those definitions are named like that for a reason ✨
• width — frame width in pixels 📐
• height — frame height in pixels 📏
• interval — frame interval in seconds ⏱️ yes, seconds. don't come for me, that's what it says.
• which — interval type (from enum v4l2_subdev_format_whence). ikyk 😌
• stream — stream number, defined in subdev routing 🌈
• reserved — drivers and applications must zero this array. not "should", not "maybe", must. zero it. periodt 💀

🫶 real talk: that reserved array is not a suggestion, it's a rule. zero it out and everyone stays happy.

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👑 SEE ALSO 👑

where else to find her friends 💜:

• Kernel file ./include/uapi/linux/v4l2-subdev.h enum
• v4l2_subdev_format_whence(9)
• struct v4l2_subdev_format(9)
• struct v4l2_subdev_crop(9)
• struct v4l2_subdev_mbus_code_enum(9)
• struct v4l2_subdev_frame_size_enum(9)
• struct v4l2_subdev_frame_interval(9)
• struct v4l2_subdev_selection(9)
• struct v4l2_subdev_capability(9)
• struct v4l2_subdev_route(9)
• struct v4l2_subdev_routing(9)
• struct v4l2_subdev_client_capability(9)

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and that's the page, bestie 🧚💖 sign-off time: this little love letter lives in ./include/uapi/linux, dated October 2026, and it's filed under struct v4l2_...nterval_enum(9) in the Kernel API Manual. slay, go zero your reserved array, and stay iconic ⭐🔥👑