tb_port_get_link_width(9)

💖 NAME 💖

okay so bestie, we're in the Kernel API Manual and this is the tb_port_get_link_width(9) page. Its name is literally Get current link width — that's the whole assignment, no cap. 💅

✨ SYNOPSIS ✨

int tb_port_get_link_width (struct tb_port *port );

that's the exact signature, character for character. slay. 🫶

🎀 ARGUMENTS 🎀

• port — the port you're checking (USB4 or CIO). this is the main character you pass in, bestie. 💖

🦋 RETURN 🦋

Link width encoded in enum tb_link_width, or a negative errno in case of failure. so: width when it works, negative errno when it doesn't. periodt. 😭

🌈 SEE ALSO 🌈

Kernel file ./drivers/thunderbolt/switch.c plus the entire Thunderbolt friend group: tb_switch_nvm_read(9), tb_port_state(9), tb_wait_for_port(9), tb_port_add_nfc_credits(9), tb_port_clear_counter(9), tb_port_unlock(9), tb_port_enable(9), tb_port_disable(9), tb_port_reset(9), tb_port_alloc_in_hopid(9), tb_port_alloc_out_hopid(9), tb_port_release_in_hopid(9), tb_port_release_out_hopid(9), tb_next_port_on_path(9), tb_port_get_link_speed(9), tb_port_get_link_generation(9), tb_port_width_supported(9), tb_port_set_link_width(9), tb_port_set_lane_bonding(9), tb_port_lane_bonding_enable(9), tb_port_lane_bonding_disable(9), tb_port_wait_for_link_width(9), tb_port_update_credits(9), tb_port_is_enabled(9), tb_usb3_port_is_enabled(9), tb_usb3_port_enable(9), tb_pci_port_is_enabled(9), tb_pci_port_enable(9), tb_dp_port_hpd_is_active(9), tb_dp_port_hpd_clear(9), tb_dp_port_set_hops(9), tb_dp_port_is_enabled(9), tb_dp_port_enable(9), tb_switch_reset(9), tb_switch_wait_for_bit(9), tb_switch_alloc(9), tb_switch_alloc_safe_mode(9), tb_switch_configure(9), tb_switch_configuration_valid(9), tb_switch_lane_bonding_enable(9), tb_switch_lane_bonding_disable(9), tb_switch_set_link_width(9), tb_switch_configure_link(9), tb_switch_unconfigure_link(9), tb_switch_add(9), tb_switch_remove(9), tb_sw_set_unplugged(9), tb_switch_resume(9), tb_switch_suspend(9), tb_switch_query_dp_resource(9), tb_switch_alloc_dp_resource(9), tb_switch_dealloc_dp_resource(9), tb_switch_find_by_link_depth(9), tb_switch_find_by_uuid(9), tb_switch_find_by_route(9), tb_switch_find_port(9), tb_switch_pcie_l1_enable(9), tb_switch_xhci_connect(9), tb_switch_xhci_disconnect(9)

byeee bestie 💖 this little page came from source/version ./drivers/thunderbolt, dated October 2026, and it's still the tb_port_get_link_width(9) page. mwah 💋✨