could_mpcc_...active_pipes(9)

✨ could_mpcc_...active_pipes(9) ✨

okay so bestie, you've stumbled into the Kernel API Manual and landed on could_mpcc_...active_pipes(9) — honestly a whole mouthful, but she's iconic and she knows it 💅

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🎀 NAME 🎀

could_mpcc_tree_change_for_active_pipes — the vibe check that tells you whether an OPP associated with MPCC might change 👀

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🌸 SYNOPSIS 🌸

bool could_mpcc_tree_change_for_active_pipes (struct dc *dc , struct
dc_stream_state *stream , struct dc_surface_update *srf_updates , int
surface_count , bool *is_plane_addition );

like, that's the whole signature, no cap 🫶

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🦋 ARGUMENTS 🦋

• dc — used to get the current state status, she's the one holding the receipts 📋
• stream — the target stream, which we want to remove the attached planes from. yes, that stream bestie ✂️
• srf_updates — an array of surface updates, like a little stack of glow-ups 🌈
• surface_count — the number of surface update, one per update, we're counting 📊
• is_plane_addition — marked [in], and you fill it out with true if it's a plane addition case 💖

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💜 DESCRIPTION 💜

So here's the tea, bestie 🍵 — DCN32x and newer support a feature named Dynamic ODM, and she can conflict with the MPO if the two get used simultaneously in some specific configurations (e.g., 4k144). literally the worst pairing, giving enemies-to-lovers energy but in a bad way 😭

This function checks if the incoming context requires applying a transition state with unnecessary pipe splitting and ODM disabled — all so we can circumvent our hardware limitations and prevent this edge case from ruining the whole moment 🙈

And if the OPP associated with an MPCC might change due to plane additions? this function returns true. periodt 🔥

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⭐ RETURN ⭐

Return true if OPP and MPCC might change. Otherwise? return false. simple as that, slay 💅

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🌈 SEE ALSO 🌈

okay this list goes off, stay with me 👑

• the Kernel file ./drivers/gpu/drm/amd/display/dc/core/dc.c Overview(9)
• dc_stream_get_last_used_drr_vtotal(9)
• dc_stream_configure_crc(9)
• dc_stream_get_crc(9)
• dc_stream_adjust_vmin_vmax(9)
• dc_commit_state_no_check(9)
• dc_commit_streams(9)
• dc_check_state_update(9)
• dc_check_update_surfaces_for_stream(9)
• update_seamless_boot_flags(9)
• update_planes_and_stream_state(9)
• dc_check_address_only_update(9)
• build_dmub_cmd_list(9)
• commit_minimal_transition_state_in_dc_update(9)
• commit_minimal_transition_state(9)
• dc_update_state(9)
• dc_update_planes_and_stream(9)
• dc_enable_dcmode_clk_limit(9)
• dc_is_dmub_outbox_supported(9)
• dc_enable_dmub_notifications(9)
• dc_enable_dmub_outbox(9)
• dc_process_dmub_aux_transfer_async(9)
• dc_process_dmub_set_config_async(9)
• dc_process_dmub_set_mst_slots(9)
• dc_process_dmub_dpia_set_tps_notification(9)
• dc_process_dmub_dpia_hpd_int_enable(9)
• dc_print_dmub_diagnostic_data(9)
• dc_disable_accelerated_mode(9)
• dc_notify_vsync_int_state(9)
• dc_set_edp_power(9)
• dc_get_power_profile_for_dc_state(9)
• dc_get_det_buffer_size_from_state(9)
• dc_get_host_router_index(9)
• should_commit_intermediate_context(9)
• dc_update_probes_prepare(9)
• dc_update_probes_execute(9)

fr fr, go read them, iykyk 📚✨

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and that's the whole page bestie 🎀 big mwah to whoever shipped her from ./drivers/gpu/drm/amd/display/..., dated October 2026 — shoutout to the could_mpcc_...active_pipes(9) girlies, we love you, bye 👑💖