STRUCT MTK_JPEG_DEV(9)

💖 NAME 💖

okay so bestie, this is struct mtk_jpeg_dev(9) from the Kernel API Manual, and it is literally the JPEG IP abstraction. main character energy for the JPEG situation, no cap. 🎀

✨ SYNOPSIS ✨

here's the whole struct, exactly as it is, no edits, no chaos:

struct mtk_jpeg_dev {
    struct mutex            lock;
    spinlock_t hw_lock;
    struct workqueue_struct *workqueue;
    struct device           *dev;
    struct v4l2_device      v4l2_dev;
    struct v4l2_m2m_dev     *m2m_dev;
    void *alloc_ctx;
    struct video_device     *vdev;
    void __iomem            *reg_base;
    struct delayed_work job_timeout_work;
    const struct mtk_jpeg_variant *variant;
    void __iomem *reg_encbase[MTK_JPEGENC_HW_MAX];
    struct mtk_jpegenc_comp_dev *enc_hw_dev[MTK_JPEGENC_HW_MAX];
    wait_queue_head_t hw_wq;
    atomic_t hw_rdy;
    void __iomem *reg_decbase[MTK_JPEGDEC_HW_MAX];
    struct mtk_jpegdec_comp_dev *dec_hw_dev[MTK_JPEGDEC_HW_MAX];
    atomic_t hw_index;
};

look at all those fields — she's booked and busy 💅

💅 Members 💅

• lock — the mutex protecting this structure. yes ma'am, mutual exclusion but make it fashion.
• hw_lock — the spinlock protecting the hw device resource. tiny, fierce, doing the most.
• workqueue — the decode work queue. periodt.
• dev — the JPEG device.
• v4l2_dev — the v4l2 device for mem2mem mode.
• m2m_dev — the v4l2 mem2mem device data.
• alloc_ctx — the videobuf2 memory allocator's context. the way that apostrophe is carrying the whole sentence 😭
• vdev — the video device node for jpeg mem2mem mode.
• reg_base — the JPEG registers mapping.
• job_timeout_work — the IRQ timeout structure. keeping track, bestie.
• variant — the driver variant to be used.
• reg_encbase — the jpg encode register base addr.
• enc_hw_dev — the jpg encode hardware device.
• hw_wq — the jpg wait queue.
• hw_rdy — the jpg hw ready flag.
• reg_decbase — the jpg decode register base addr.
• dec_hw_dev — the jpg decode hardware device.
• hw_index — the jpg hw index.

🔥 SEE ALSO 🔥

kernel file ./drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.h enum — and these references too, bestie, go read them:

• mtk_jpeg_ctx_state(9)
• struct mtk_jpeg_variant(9)
• struct mtk_jpegenc_clk(9)
• struct mtk_jpegdec_clk(9)
• struct mtk_jpegenc_comp_dev(9)
• struct mtk_jpegdec_comp_dev(9)
• struct mtk_jpeg_fmt(9)
• struct mtk_jpeg_q_data(9)
• struct mtk_jpeg_ctx(9)

signed off from ./drivers/media/platform/media..., dated October 2026 — still serving struct mtk_jpeg_dev(9), still iconic 💜