STRUCT S3C_FB_VARIANT(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 struct s3c_fb_variant(9) 🌸

okay bestie, so this is a page from the Kernel API Manual, and we're talking about struct s3c_fb_variant — literally the vibe sheet for an fb variant. it's giving "here's everything you need to know about this particular screen controller situation" 💅

✨ NAME ✨

struct s3c_fb_variant — fb variant information 🎀

✨ SYNOPSIS ✨

struct s3c_fb_variant {
    unsigned int    is_2443:1;
    unsigned short  nr_windows;
    unsigned int    vidtcon;
    unsigned short  wincon;
    unsigned short  winmap;
    unsigned short  keycon;
    unsigned short  buf_start;
    unsigned short  buf_end;
    unsigned short  buf_size;
    unsigned short  osd;
    unsigned short  osd_stride;
    unsigned short  palette[S3C_FB_MAX_WIN];
    unsigned int    has_prtcon:1;
    unsigned int    has_shadowcon:1;
    unsigned int    has_blendcon:1;
    unsigned int    has_clksel:1;
    unsigned int    has_fixvclk:1;
};

no cap, that's the whole shape of it 🫶

✨ Members ✨

okay so each of these is a member, and honestly they're all little personality traits of the variant:

  • is_2443 — set if this is S3C2443/S3C2416 style hardware 🦋
  • nr_windows — the number of windows, bestie. how many we got.
  • vidtcon — the base for the VIDTCONx registers
  • wincon — the base for the WINxCON registers.
  • winmap — the base for the WINxMAP registers.
  • keycon — the abse for the WxKEYCON registers. (yes, "abse" — that's the original's typo era, we're keeping the info: it's the base 💀)
  • buf_start — offset of buffer start registers.
  • buf_end — offset of buffer end registers.
  • buf_size — offset of buffer size registers.
  • osd — the base for the OSD registers.
  • osd_stride — stride of osd
  • palette — address of palette memory, or 0 if none. 🎨 (iconic — zero means nope, no palette)
  • has_prtcon — set if has PRTCON register.
  • has_shadowcon — set if has SHADOWCON register.
  • has_blendcon — set if has BLENDCON register.
  • has_clksel — set if VIDCON0 register has CLKSEL bit.
  • has_fixvclk — set if VIDCON1 register has FIXVCLK bits.

✨ SEE ALSO ✨

Kernel file ./drivers/video/fbdev/s3c-fb.c 🌈 — and literally the whole friend group:

bestie reminder: palette being 0 means there's genuinely no palette memory, it's not a "we forgot to fill it in" situation. 🫶

that's the whole page, mwah 💖 this came from ./drivers/video/fbdev, dated October 2026, and it's still out here living as struct s3c_fb_variant(9) ✨👑

📦 where this page comes from