STRUCT S5P_JPEG(9)

💅 struct s5p_jpeg(9) — kernel API manual, but make it make sense

okay so bestie, we're in the Kernel API Manual and today's main character is struct s5p_jpeg — the whole JPEG IP abstraction situation. yes it's a struct, yes it's a lot of fields, no we're not skipping any of them. periodt. 🎀

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✨ NAME ✨

struct s5p_jpeg — literally the JPEG IP abstraction. that's it, that's the vibe. 🦋

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🌸 SYNOPSIS 🌸

here's the whole squad, exactly as declared, no edits no cap:

struct s5p_jpeg {
    struct mutex            lock;
    spinlock_t slock;
    struct v4l2_device      v4l2_dev;
    struct video_device     *vfd_encoder;
    struct video_device     *vfd_decoder;
    struct v4l2_m2m_dev     *m2m_dev;
    void __iomem            *regs;
    unsigned int            irq;
    enum exynos4_jpeg_result irq_ret;
    struct clk              *clocks[JPEG_MAX_CLOCKS];
    struct device           *dev;
    struct s5p_jpeg_variant *variant;
    u32 irq_status;
 };

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👑 Members 👑

• lock — the mutex that's out here protecting this entire structure. lowkey the bodyguard of the group chat. 🫶
• slock — spinlock doing security detail for the device contexts specifically. different job, same energy. 🔥
• v4l2_dev — the v4l2 device, but for mem2mem mode. iykyk.
• vfd_encoder — the video device node for encoder mem2mem mode. the encoder's whole moment. ✨
• vfd_decoder — the video device node for decoder mem2mem mode. twin sibling energy fr fr. 💜
• m2m_dev — v4l2 mem2mem device data. the receipts. 📝
• regs — the JPEG IP registers mapping. where the registers actually live. 🗺️
• irq — the JPEG IP irq. An unsigned int? yes babes. it's giving interrupt. 😭
• irq_ret — the JPEG IP irq result value, typed enum exynos4_jpeg_result. the tea after the interrupt. 🍓
• clocks — the JPEG IP clock(s). plural! an array! struct clk *clocks[JPEG_MAX_CLOCKS] — up to JPEG_MAX_CLOCKS of them bestie. ⏰
• dev — the JPEG IP struct device. the parent figure. 🧚
• variant — the driver variant to be used. pick your fighter. 💅
• irq_status — interrupt flags set during a single encode/decode operation. one (1) operation, one (1) set of flags. that's the deal. 🌈

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🦋 SEE ALSO 🦋

Kernel file ./drivers/media/platform/samsung/s5p-jpeg/jpeg-core.h, plus the whole extended universe:

• struct s5p_jpeg_fmt(9)
• struct s5p_jpeg_marker(9)
• struct s5p_jpeg_q_data(9)
• struct s5p_jpeg_ctx(9)
• struct s5p_jpeg_buffer(9)
• struct s5p_jpeg_addr(9)

go read them all, they're literally iconic. 🏆

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ngl if you're touching lock or slock without knowing which one you're supposed to be holding, put it down and back away slowly bestie 😭 the whole struct is trusting you.

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okay that's the page!! sourced from ./drivers/media/platform/samsu... and dated October 2026 — yes the future, we're ahead of schedule 💀✨ catch you in struct s5p_jpeg(9) again soon, mwah! 🫶🎀