STRUCT JPU(9)

✨ struct jpu — JPEG IP abstraction ✨

okay bestie, welcome to the struct jpu(9) page from the Kernel API Manual 💖 this is the main character struct for the JPEG IP, and we're gonna walk through every single field together, no cap.

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🌸 NAME 🌸

struct jpu — the JPEG IP abstraction, periodt. it's giving "one struct to hold the whole device together" energy 👑

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🦋 SYNOPSIS 🦋

struct jpu {
    struct mutex    mutex;
    spinlock_t lock;
    struct v4l2_device      v4l2_dev;
    struct video_device     vfd_encoder;
    struct video_device     vfd_decoder;
    struct v4l2_m2m_dev     *m2m_dev;
    struct jpu_ctx          *curr;
    void __iomem            *regs;
    unsigned int            irq;
    struct clk              *clk;
    struct device           *dev;
    int ref_count;
 };

literally the whole vibe of the JPEG IP in one little block 🎀

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💅 Members 💅

so here's the member-by-member breakdown, and yes we're doing all of them, iykyk:

• mutex — the mutex protecting this structure. big "don't touch my stuff while i'm working" energy 🔒
• lock — spinlock protecting the device contexts. tiny, fast, spicy 🌶️
• v4l2_dev — v4l2 device for mem2mem mode ✨
• vfd_encoder — video device node for encoder mem2mem mode 🎬
• vfd_decoder — video device node for decoder mem2mem mode 🎥
• m2m_dev — v4l2 mem2mem device data, the pointer that holds it all together 🫶
• curr — pointer to current context. whoever's on stage right now 👑
• regs — JPEG IP registers mapping. the void __iomem * we all know and love 💜
• irq — JPEG IP irq. the interrupt, unsigned int style ⚡
• clk — JPEG IP clock 🕰️
• dev — JPEG IP struct device 🧚
• ref_count — reference counter. counting refs like it's going out of style 🔥

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🎀 SEE ALSO 🎀

• Kernel file ./drivers/media/platform/renesas/rcar_jpu.c
• struct jpu_buffer(9)
• struct jpu_fmt(9)
• struct jpu_q_data(9)
• struct jpu_ctx(9)

go read those too bestie, they're literally the supporting cast 💖

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and that's the whole page!! slay 💅 this gem comes to you from ./drivers/media/platform/renesas, dated October 2026 — catch you in the next manpage, mwah 🦋🌈⭐