STRUCT FBTFT_OPS(9)

💅 NAME 💅

Okay so this is struct fbtft_ops(9) — the FBTFT operations structure — straight out of the Kernel API Manual, bestie 💖. She's a struct full of function pointers and she is serving.

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✨ SYNOPSIS ✨

Picture the struct, and it's giving a whole lineup of function pointers 🫶:

struct fbtft_ops {
    int (*write)(struct fbtft_par *par, void *buf, size_t len);
    int (*read)(struct fbtft_par *par, void *buf, size_t len);
    int (*write_vmem)(struct fbtft_par *par, size_t offset, size_t len);
    void (*write_register)(struct fbtft_par *par, int len, ...);
    void (*set_addr_win)(struct fbtft_par *par, int xs, int ys, int xe,
int ye);
    void (*reset)(struct fbtft_par *par);
    void (*mkdirty)(struct fb_info *info, int from, int to);
    void (*update_display)(struct fbtft_par *par, unsigned int
start_line, unsigned int end_line);
    int (*init_display)(struct fbtft_par *par);
    int (*blank)(struct fbtft_par *par, bool on);
    unsigned long (*request_gpios_match)(struct fbtft_par *par, const
struct fbtft_gpio *gpio);
    int (*request_gpios)(struct fbtft_par *par);
    int (*verify_gpios)(struct fbtft_par *par);
    void (*register_backlight)(struct fbtft_par *par);
    void (*unregister_backlight)(struct fbtft_par *par);
    int (*set_var)(struct fbtft_par *par);
    int (*set_gamma)(struct fbtft_par *par, u32 *curves);
};

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💖 MEMBERS 💖

Here's the member-by-member vibe check, no skips, every single deet intact ✨:

• write — writes to interface bus, periodt 💅
• read — reads from interface bus, no cap 🫶
• write_vmem — writes video memory to display, slay ✨
• set_addr_win — set the GRAM update window, iconic 🎀
• reset — reset the LCD controller, main character energy 🔥
• mkdirty — marks display lines for update, lowkey useful 👑
• update_display — updates the display, obviously 💖
• init_display — initializes the display, the actual beginning 🌸
• blank — blank the display (optional), self-care mode 🧚
• request_gpios_match — do pinname to gpio matching, iykyk 🦋
• request_gpios — request gpios from the kernel, go ask nicely 💜
• verify_gpios — verify that necessary gpios is present (optional), vibe check ⭐
• register_backlight — used to register backlight device (optional), glow-up 💡
• unregister_backlight — unregister backlight device (optional), bye bestie 💀
• set_var — configure LCD with values from variables like rotate and bgr (optional), very demure 🌈
• set_gamma — set Gamma curve (optional), color me obsessed 🍓

Also write_register is right up there in the synopsis — the Members list doesn't give it its own description, so I'm not making one up, bestie 💀.

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🌸 DESCRIPTION 🌸

Most of these operations have default functions assigned to them in fbtft_framebuffer_alloc — that's the whole plot twist, fr fr 🌈.

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/staging/fbtft/fbtft.h — struct fbtft_gpio(9), struct fbtft_display(9), struct fbtft_platform_data(9), struct fbtft_par(9)

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Sign-off from ./drivers/staging/fbtft, dated October 2026 — this was struct fbtft_ops(9), and yes she ate 💅🎀🦋