drm_dp_mst_c...ate_register(9)

✨ drm_dp_mst_connector_late_register ✨

okay bestie so this is from the Kernel API Manual — yes we're doing kernel docs today, it's giving ✨low-level excellence✨ and honestly? iconic 💅

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🌸 NAME 🌸

drm_dp_mst_connector_late_register — the late MST connector registration 💖 (yes, "late", like showing up to the function call fashionably on time 🎀)

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🦋 SYNOPSIS 🦋

int drm_dp_mst_connector_late_register (struct drm_connector *connector
, struct drm_dp_mst_port *port );

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🎀 ARGUMENTS 🎀

• connector — the MST connector itself, the main character of this whole situation 👑
• port — the MST port that belongs to this connector, its lil bestie 🫶

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💜 DESCRIPTION 💜

So this is a helper that registers the remote aux device for this MST port — literally that's its whole job and it does it flawlessly 💅

Drivers should call this from their mst connector's late_register hook, which is the whole point: doing it there is what enables MST aux devices in the first place ✨ no cap.

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🔥 RETURN 🔥

0 on success 🎉 — and a negative error code on failure 😭 (so check it, bestie, fr fr).

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🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/display/drm_dp_mst_topology.c — that's where the magic lives 🧚 plus a whole friend group of related functions:

• dp mst helper(9)
• Branch device and port refcounting(9)
• drm_dp_mst_get_mstb_malloc(9)
• drm_dp_mst_put_mstb_malloc(9)
• drm_dp_mst_get_port_malloc(9)
• drm_dp_mst_put_port_malloc(9)
• drm_dp_mst_topology_try_get_mstb(9)
• drm_dp_mst_topology_get_mstb(9)
• drm_dp_mst_topology_put_mstb(9)
• drm_dp_mst_topology_try_get_port(9)
• drm_dp_mst_topology_get_port(9)
• drm_dp_mst_topology_put_port(9)
• drm_dp_mst_dpcd_read(9)
• drm_dp_mst_dpcd_write(9)
• drm_dp_mst_connector_early_unregister(9)
• drm_dp_add_payload_part1(9)
• drm_dp_remove_payload_part1(9)
• drm_dp_remove_payload_part2(9)
• drm_dp_add_payload_part2(9)
• drm_dp_get_vc_payload_bw(9)
• drm_dp_read_mst_cap(9)
• drm_dp_mst_topology_mgr_set_mst(9)
• drm_dp_mst_topology_queue_probe(9)
• drm_dp_mst_topology_mgr_suspend(9)
• drm_dp_mst_topology_mgr_resume(9)
• drm_dp_mst_hpd_irq_handle_event(9)
• drm_dp_mst_hpd_irq_send_new_request(9)
• drm_dp_mst_detect_port(9)
• drm_dp_mst_edid_read(9)
• drm_dp_mst_get_edid(9)
• drm_dp_atomic_find_time_slots(9)
• drm_dp_atomic_release_time_slots(9)
• drm_dp_mst_atomic_setup_commit(9)
• drm_dp_mst_atomic_wait_for_dependencies(9)
• drm_dp_mst_root_conn_atomic_check(9)
• drm_dp_mst_update_slots(9)
• drm_dp_check_act_status(9)
• drm_dp_calc_pbn_mode(9)
• drm_dp_mst_dump_topology(9)
• drm_dp_mst_port_downstream_of_parent(9)
• drm_dp_mst_add_affected_dsc_crtcs(9)
• drm_dp_mst_atomic_enable_dsc(9)
• drm_dp_mst_atomic_check_mgr(9)
• drm_dp_mst_atomic_check(9)
• drm_atomic_get_mst_topology_state(9)
• drm_atomic_get_old_mst_topology_state(9)
• drm_atomic_get_new_mst_topology_state(9)
• drm_dp_mst_topology_mgr_init(9)
• drm_dp_mst_topology_mgr_destroy(9)
• drm_dp_mst_register_i2c_bus(9)
• drm_dp_mst_unregister_i2c_bus(9)
• drm_dp_mst_is_virtual_dpcd(9)
• drm_dp_mst_aux_for_parent(9)
• drm_dp_mst_dsc_aux_for_port(9)

That's the whole squad, go read them all, iykyk 💀💖

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ok that's the page!! sourced from ./drivers/gpu/drm/display, dated October 2026 — ty for coming to my ted talk, mwah 🍓✨💅