drm_dp_mst_t...ogy_put_mstb(9)

💅 drm_dp_mst_topology_put_mstb(9) — the "okay bestie, drop the ref" page

Hiii welcome to the Kernel API Manual, the corner of the kernel where DRM DisplayPort MST topology stuff lives ✨ (the running header up top is drm_dp_mst_t...ogy_put_mstb(9) because it got truncated at the function-name printer, iconic of it honestly 🎀)

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🌸 NAME

drm_dp_mst_topology_put_mstb — release a topology reference to a branch device 🦋

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✨ SYNOPSIS

void drm_dp_mst_topology_put_mstb(struct drm_dp_mst_branch *mstb);

Like, that's it. Void function, one argument, no return value, no drama 💅

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🎀 ARGUMENTS

• mstb — the struct drm_dp_mst_branch you want to release the topology reference from. That's the branch device in question, the main character of this whole operation 👑

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💖 DESCRIPTION

Okay so what this does: it releases a topology reference from mstb, and it does that by decrementing drm_dp_mst_branch.topology_kref. That's the whole vibe check. One reference handed back, the counter goes down, slay 🔥

And if you're sitting here like "wait, what about the other ref ops?" — yes bestie, the page literally says see also: drm_dp_mst_topology_try_get_mstb and drm_dp_mst_topology_get_mstb. Those are the getters, this is the putter. Balance. Periodt 💜

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🦋 SEE ALSO

The kernel file it lives in is ./drivers/gpu/drm/display/drm_dp_mst_topology.c — and here is the entire squad of related pages, every single one, no skips, because I would never do you like that 🫶

• 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_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_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)

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Ngl bestie, the only thing on this page is the decrement of drm_dp_mst_branch.topology_kref. That's the entire plot. No hidden twist, no unlisted behaviour, no secret extra params. If you were hoping for more lore, the SEE ALSO list above is where the lore is 📚💀

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Okay that's the page!! Mwah 💋 It shipped from ./drivers/gpu/drm/display, dated October 2026, and the whole thing is filed under drm_dp_mst_t...ogy_put_mstb(9) in your Kernel API Manual. Go put that reference back where it belongs, you absolute icon 👑🌈⭐