STRUCT DMUB_SRV_FB_INFO(9)

📦 version 7.3.1, in nixpkgs unstable

🦋 struct dmub_srv_fb_info(9) — Kernel API Manual 💅

okay so this is the glow-up of the struct dmub_srv_fb_info(9) page from the Kernel API Manual, and honestly? it's giving "tiny struct, big responsibilities" ✨

🌸 NAME 🌸

struct dmub_srv_fb_info — the little output that hands your fb info back from the dmub service 🫶

✨ SYNOPSIS ✨

struct dmub_srv_fb_info {
    uint8_t num_fb;
    struct dmub_fb fb[DMUB_WINDOW_TOTAL];
 };

🎀 Members 🎀

so the struct literally has two things in it, and yes we're listing them exactly as-is, no skips:

  • uint8_t num_fb — yep, that's the count, bestie 🌈
  • struct dmub_fb fb[DMUB_WINDOW_TOTAL] — the whole array of fbs, sized by DMUB_WINDOW_TOTAL 💜

💖 Description 💖

okay so picture this: this struct is the output from the dmub service helper 🫶 and the driver uses it to prepare dmub_fb entries that can then be passed into the dmub hw init service. it's literally the handoff. the relay baton. main character energy 🔥

and here's the vibe check that matters — it assumes that all regions live inside the same framebuffer, and that they've been set up according to the region_info generated by the dmub service. no cap, if that assumption isn't holding, this isn't your girl 💀

fr fr, that "assumes" line is load-bearing. all regions in the same framebuffer, set up per the region_info from the dmub service. that's the deal. 🙈

👑 SEE ALSO 👑

everything below is exactly the reference crew — no additions, no dropouts, periodt 💅

that's the whole page, bestie, nothing left out 💖 and for the sign-off: this lil beauty comes from ./drivers/gpu/drm/amd/display/..., dated October 2026, and it's filed under struct dmub_srv_fb_info(9) 🎀 slay ✨

📦 where this page comes from