STRUCT FIMC_LITE(9)

💅 struct fimc_lite(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ — today we're getting deep into the fimc lite structure and honestly? it's giving main character energy for the whole Exynos camera pipeline 📸💖

🌈 SYNOPSIS 🌈

like, here's the whole vibe of the struct, character for character, no notes:

struct fimc_lite {
    struct platform_device  *pdev;
    struct flite_drvdata    *dd;
    struct exynos_video_entity ve;
    struct v4l2_device      *v4l2_dev;
    struct v4l2_fh          fh;
    struct v4l2_subdev      subdev;
    struct media_pad        vd_pad;
    struct media_pad        subdev_pads[FLITE_SD_PADS_NUM];
    struct v4l2_subdev      *sensor;
    struct v4l2_ctrl_handler ctrl_handler;
    struct v4l2_ctrl        *test_pattern;
    int index;
    struct mutex            lock;
    spinlock_t slock;
    struct clk              *clock;
    void __iomem            *regs;
    wait_queue_head_t irq_queue;
    unsigned long           payload[FLITE_MAX_PLANES];
    struct flite_frame      inp_frame;
    struct flite_frame      out_frame;
    atomic_t out_path;
    unsigned int            source_subdev_grp_id;
    unsigned long           state;
    struct list_head        pending_buf_q;
    struct list_head        active_buf_q;
    struct vb2_queue        vb_queue;
    unsigned short          buf_index;
    unsigned int            frame_count;
    unsigned int            reqbufs_count;
    struct fimc_lite_events events;
    bool streaming;
 };

🎀 Members 🎀

• pdev — pointer to the FIMC-LITE platform device 🫶
• dd — the SoC specific driver data structure, iykyk
• ve — exynos video device entity structure ✨
• v4l2_dev — pointer to top the level v4l2_device (yes, "top the level", that's what it says, periodt)
• fh — v4l2 file handle 🎫
• subdev — the FIMC-LITE subdev 💅
• vd_pad — media (sink) pad for the capture video node
• subdev_pads — the subdev media pads, plural, we love an array
• sensor — sensor subdev attached to FIMC-LITE directly or through MIPI-CSIS 📷
• ctrl_handler — v4l2 control handler 🎛️
• test_pattern — test pattern controls 🧪
• index — FIMC-LITE platform device index
• lock — mutex serializing video device and the subdev operations 🔒
• slock — spinlock protecting this data structure and the hw registers, no cap, it's doing the most
• clock — FIMC-LITE gate clock ⏰
• regs — memory mapped io registers
• irq_queue — interrupt handler waitqueue 😴 (it waits, respectfully)
• payload — image size in bytes (w x h x bpp) 📏
• inp_frame — camera input frame structure 🎬
• out_frame — DMA output frame structure 📤
• out_path — output data path (DMA or FIFO)
• source_subdev_grp_id — source subdev group id 🆔
• state — driver state flags 🚩
• pending_buf_q — pending buffers queue head
• active_buf_q — the queue head of buffers scheduled in hardware 🔥
• vb_queue — vb2 buffers queue 📚
• buf_index — helps to keep track of the DMA start address register index
• frame_count — the captured frames counter 🔢
• reqbufs_count — the number of buffers requested with REQBUFS ioctl
• events — event info 🎉
• streaming — is streaming in progress? literally the whole question 💀

🦋 SEE ALSO 🦋

• Kernel file ./drivers/media/platform/samsung/exynos4-is/fimc-lite.h 📁
• struct flite_drvdata(9), struct flite_frame(9), struct flite_buffer(9) — go read these next bestie, they're iconic 👑

and that's the tea ☕💖 this page came from ./drivers/media/platform/samsu... and it's dated October 2026, so like, future vibes only 🌸🫶 slay, and remember: know your structs, know yourself ✨💅