STRUCT CSIS_STATE(9)

💖 struct csis_state(9) 💖

okay so bestie, welcome to the Kernel API Manual, section 9 — this page is literally all about struct csis_state, which is the driver's internal state data structure. like, it's the main character of the whole s5p-mipi-csis situation. let's get into it 🎀

✨ SYNOPSIS ✨

here's the whole shape of it, bestie — every field, no skips:

struct csis_state {
    struct mutex lock;
    struct media_pad pads[CSIS_PADS_NUM];
    struct v4l2_subdev sd;
    u8 index;
    struct platform_device *pdev;
    struct phy *phy;
    void __iomem *regs;
    struct regulator_bulk_data supplies[CSIS_NUM_SUPPLIES];
    struct clk *clock[NUM_CSIS_CLOCKS];
    int irq;
    u32 interrupt_mask;
    u32 flags;
    u32 clk_frequency;
    u32 hs_settle;
    u32 num_lanes;
    u32 max_num_lanes;
    u8 wclk_ext;
    const struct csis_pix_format *csis_fmt;
    struct v4l2_mbus_framefmt format;
    spinlock_t slock;
    struct csis_pktbuf pkt_buf;
    struct s5pcsis_event events[S5PCSIS_NUM_EVENTS];
 };

🦋 no cap, that's the whole vibe right there.

🌸 Members 🌸

okay now the part you actually came for — member by member, let's go 👑

• lock — a mutex that serializes the subdev and power management operations, and it also protects the format and flags members. it's giving bouncer at the club 💅
• pads — the CSIS pads array. iconic.
• sd — the v4l2_subdev that's associated with this CSIS device instance.
• index — the hardware instance index. which one are we, bestie?
• pdev — the CSIS platform device.
• phy — pointer to the CSIS generic PHY.
• regs — the mmapped I/O registers memory. that's where the registers live 🏠
• supplies — the CSIS regulator supplies.
• clock — the CSIS clocks. plural, she's got a whole collection ⏰
• irq — the requested s5p-mipi-csis irq number.
• interrupt_mask — the interrupt mask of all the used interrupts.
• flags — the state variable for power and streaming control. very "am i on, am i streaming" of her.
• clk_frequency — the device bus clock frequency.
• hs_settle — the HS-RX settle time.
• num_lanes — number of MIPI-CSI data lanes used.
• max_num_lanes — maximum number of MIPI-CSI data lanes supported. yes she can do more, she's just choosing not to 🙈
• wclk_ext — CSI wrapper clock: 0 - bus clock, 1 - external SCLK_CAM. two options, pick your fighter ⭐
• csis_fmt — the current CSIS pixel format.
• format — the common media bus format for the source and sink pad.
• slock — a spinlock protecting the structure members below. she's the guard dog for the next few fields 💀
• pkt_buf — the frame embedded (non-image) data buffer.
• events — MIPI-CSIS event (error) counters. keeping receipts on every error 🔥

👀 SEE ALSO 👀

go touch grass in these files, iykyk:

• Kernel file ./drivers/media/platform/samsung/exynos4-is/mipi-csis.c
• struct csis_pix_format(9)

and that's the whole page, bestie 🫶 fr fr you ate that. this lil number came to you from the source path ./drivers/media/platform/samsu... and it's dated October 2026 — so like, future vibes only 💜✨🎀