intel_link_bw_atomic_check(9)

🌸 NAME 🌸

Okay so bestie, this is the intel_link_bw_atomic_check(9) page from the Kernel API Manual — and yes, it’s giving “display link bandwidth check” energy 💅✨

intel_link_bw_atomic_check — check display link states and set a fallback config if needed 🫶

✨ SYNOPSIS ✨

int intel_link_bw_atomic_check (struct intel_atomic_state *state ,
       struct intel_link_bw_limits *new_limits );

🎀 ARGUMENTS 🎀

• state — atomic state, no cap 😌
• new_limits — link BW limits, fr fr 💖

💖 DESCRIPTION 💖

Okay so here’s the tea: this function checks the configuration of all shared display links in state, and if there’s a BW limitation, it sets new BW limits in new_limits. That’s the whole flex 🔥

🔥 RETURN 🔥

• 0 — the configuration is valid, slay ✅
• -EAGAIN — the configuration is invalid and new_limits got updated with fallback values; with those fallback values, the configuration of all CRTCs in state must be recomputed 😭🔁
• Other negative error — the configuration is invalid without a fallback possibility, or the check failed for another reason 💀

🦋 SEE ALSO 🦋

• Kernel file: ./drivers/gpu/drm/i915/display/intel_link_bw.c
• intel_link_bw_init_limits(9)
• __intel_link_bw_reduce_bpp(9)
• intel_link_bw_compute_pipe_bpp(9)
• intel_link_bw_set_bpp_limit_for_pipe(9)

Go read these if you’re in your Unix main character era 👑📚

signed off from the source/version ./drivers/gpu/drm/i915/display, dated October 2026, on the intel_link_bw_atomic_check(9) page — periodt 💖✨