drm_dp_mst_register_i2c_bus(9)

💅 drm_dp_mst_register_i2c_bus(9) ✨

okay bestie, so this is a page from the Kernel API Manual and it's literally about registering an I2C adapter for I2C-over-AUX 💖 yes it's as niche as it sounds and yes we're gonna get through it together, no cap.

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✨ NAME ✨

drm_dp_mst_register_i2c_bus — register an I2C adapter for I2C-over-AUX 🦋

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🎀 SYNOPSIS 🎀

int drm_dp_mst_register_i2c_bus (struct drm_dp_mst_port *port );

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🌸 ARGUMENTS 🌸

• port — the port you want to add the I2C bus on, periodt. that's the whole argument, she's lowkey simple 🫶

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💀 DESCRIPTION 💀

okay so here's the vibe check: this returns 0 on success, or a negative error code on failure 😭 that's it. that's the description. no lore, no backstory, just vibes and a return value.

ngl bestie, this one is short — but don't let the length fool you, an error code is an error code and you will be checking it 🙈

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🔥 SEE ALSO 🔥

the friend group, the whole group chat, the entire ensemble cast — literally everyone shows up here 👑

• Kernel file ./drivers/gpu/drm/display/drm_dp_mst_topology.c
• 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_late_register(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_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)

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and that's the whole page, bestie!! 🧚💜

cute little sign-off before you go: this gorgeous thing lives in ./drivers/gpu/drm/display and it's dated October 2026 ⭐ so when you're deep in the MST topology code and someone asks where you got your info, you can say a very loud, very confident manual page told you 💅 mwah 🍓