STRUCT FIMC_MD(9)

💖 NAME 💖

okay so struct fimc_md — that's literally the fimc media device information struct, bestie. like, this is the big one that holds the whole media device's info together ✨ (and yes, we're in the Kernel API Manual, section 9, for all my fellow kernel girlies out there 🫶).

✨ SYNOPSIS ✨

no cap, here's the whole shape of it, character for character:

struct fimc_md {
    struct fimc_csis_info csis[CSIS_MAX_ENTITIES];
    struct fimc_sensor_info sensor[FIMC_MAX_SENSORS];
    int num_sensors;
    struct fimc_camclk_info camclk[FIMC_MAX_CAMCLKS];
    struct clk *wbclk[FIMC_MAX_WBCLKS];
    struct fimc_lite *fimc_lite[FIMC_LITE_MAX_DEVS];
    struct fimc_dev *fimc[FIMC_MAX_DEVS];
    struct fimc_is *fimc_is;
    bool use_isp;
    struct device *pmf;
    struct media_device media_dev;
    struct v4l2_device v4l2_dev;
    struct platform_device *pdev;
    struct cam_clk_provider {
      struct clk *clks[FIMC_MAX_CAMCLKS];
      struct clk_onecell_data clk_data;
      struct device_node *of_node;
      struct cam_clk camclk[FIMC_MAX_CAMCLKS];
      int num_clocks;
    } clk_provider;
    struct v4l2_async_notifier subdev_notifier;
    bool user_subdev_api;
    spinlock_t slock;
    struct list_head pipelines;
    struct media_graph link_setup_graph;
 };

like... look at her. she's giving main character energy 👑 (and yes, that nested struct cam_clk_provider { ... } clk_provider; is living inside her, we love a struct that contains a struct 💅).

🌸 MEMBERS 🌸

okay bestie, let's go member by member, because every single one of these matters, and I refuse to skip any 🎀

• csis — the MIPI CSIS subdevs data. that's the csis info, holding it down 💜
• sensor — array of registered sensor subdevs. all the sensors, registered, in an array, iconic.
• num_sensors — the actual number of registered sensors. like the real, lived count 🔥
• camclk — external sensor clock information. clock info for the external sensors, periodt.
• wbclk — external writeback clock information. writeback clocks, external, exactly what it says 🌸
• fimc_lite — array of registered fimc-lite devices. the lite ones, and yes they're still registered 🦋
• fimc — array of registered fimc devices. the full-size ones, same deal ✨
• fimc_is — the fimc-is data structure. it's right there, being a data structure.
• use_isp — set to true when the FIMC-IS subsystem is used. otherwise it's not true, and that's the whole vibe check 💅
• pmf — handle to the CAMCLK clock control FIMC helper device. a handle, bestie, a whole handle 🫶
• media_dev — top level media device. she's at the top, as she should be 👑
• v4l2_dev — the top level v4l2_device holding up the subdevs. literally holding them up 😭 carrying the whole team.
• pdev — the platform device this media device is hooked up into. hooked up. attached. committed 💖
• clk_provider — CAMCLK clock provider structure. the provider of the CAMCLK clocks, no notes.
• subdev_notifier — notifier for the subdevs. it notifies. about subdevs. we stan a straightforward queen 🌈
• user_subdev_api — true if the subdevs are not configured by the host driver. read that carefully ngl, it's a not situation 🙈
• slock — spinlock protecting the sensor array. do NOT forget the lock, I'm serious, that array is protected 🔒 (okay that's me being dramatic but it really is a spinlock protecting the sensor array 💀)
• pipelines — list of pipelines. a whole list, of pipelines ⭐
• link_setup_graph — the graph iterator. it iterates the graph, and honestly? slay.

🦋 SEE ALSO 🦋

• Kernel file ./drivers/media/platform/samsung/exynos4-is/media-dev.h — go read the header, iykyk 📖
• struct fimc_sensor_info(9) — the sensor info struct's very own page, go give her a visit 💖

lowkey important: everything above is exactly what the page says — I'm just the messenger with better emoji, fr fr 💅

that's the whole page bestie, you ate that 🍓 — source ./drivers/media/platform/samsu..., Kernel API Manual, dated October 2026, and that's a wrap, mwah 😘 🎀