dcn32_assign...ve_candidate(9)

hiii bestie 💖 this is the dcn32_assign...ve_candidate(9) page from the Kernel API Manual, and we're about to make FPO + VActive make sense. no cap.

🌸 NAME 🌸

dcn32_assign_fpo_vactive_candidate — Assign the FPO stream candidate for FPO + VActive case ✨

🦋 SYNOPSIS 🦋

void dcn32_assign_fpo_vactive_candidate (struct dc *dc , const struct
       dc_state *context , struct dc_stream_state **fpo_candidate_stream );

🎀 ARGUMENTS 🎀

• dc — current dc state. like, the dc state you're working with rn.
• context — new dc state. the fresh new state, bestie.
• fpo_candidate_stream — pointer to FPO stream candidate if one is found. if we find one, this pointer points at it, iykyk.

🔥 DESCRIPTION 🔥

okay so this function chooses the FPO candidate stream for FPO + VActive cases (2 stream config). she's built for the two-stream situation, periodt.

For FPO + VAtive cases — yes, VAtive, literally the spelling in the source — the assumption is that one display has ActiveMargin > 0, and the other display has ActiveMargin <= 0. This function will choose the pipe/stream that has ActiveMargin <= 0 to be the FPO stream candidate if found. so it's giving "pick the low-margin pipe if it's there" 💅

💀 RETURN 💀

void. that's it — no return value, nothing to unwrap, just vibes. 🫶

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

• dcn32_helper_populate_phantom_dlg_params(9)
• dcn32_set_phantom_stream_timing(9)
• dcn32_get_num_free_pipes(9)
• dcn32_assign_subvp_pipe(9)
• dcn32_enough_pipes_for_subvp(9)
• subvp_subvp_schedulable(9)
• subvp_drr_schedulable(9)
• subvp_vblank_schedulable(9)
• subvp_subvp_admissable(9)
• subvp_validate_static_schedulability(9)
• dcn32_allow_subvp_high_refresh_rate(9)
• dcn32_determine_max_vratio_prefetch(9)
• dcn32_find_vactive_pipe(9)

okay bye bestie 🫶 quick footer vibe check: source/version ./drivers/gpu/drm/amd/display/..., date October 2026, page dcn32_assign...ve_candidate(9). that's the whole page, mwah 💋