usb4_switch...ing_possible(9)

💅 usb4_switch_lane_bonding_possible — a Kernel API Manual moment (section 9, bestie)

okay so first things first, the manual name is usb4_switch...ing_possible(9) — yes the truncation is part of the aesthetic, we don't question it, we just roll with it 🎀

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✨ NAME ✨

usb4_switch_lane_bonding_possible — literally answers the question "are conditions met for lane bonding" 🫶

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🌸 SYNOPSIS 🌸

bool usb4_switch_lane_bonding_possible (struct tb_switch *sw );

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💖 ARGUMENTS 💖

• sw — the USB4 router. that's it, that's the argument, she's a whole USB4 router 👑

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🦋 DESCRIPTION 🦋

So what she does is: she checks whether the conditions are met so that lane bonding can be established with the upstream router. vibe check for lane bonding, basically ✨

⚠️ okay this part matters bestie — call only for device routers. not host routers, not your random little side routers, device routers. periodt 💅

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🔥 RETURN 🔥

• true if lane bonding is possible 👑
• false otherwise 💀

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🌈 SEE ALSO 🌈

Kernel file ./drivers/thunderbolt/usb4.c and honestly the entire extended friend group:

• usb4_switch_check_wakes(9)
• usb4_switch_setup(9)
• usb4_switch_configuration_valid(9)
• usb4_switch_read_uid(9)
• usb4_switch_drom_read(9)
• usb4_switch_set_wake(9)
• usb4_switch_set_sleep(9)
• usb4_switch_nvm_sector_size(9)
• usb4_switch_nvm_read(9)
• usb4_switch_nvm_set_offset(9)
• usb4_switch_nvm_write(9)
• usb4_switch_nvm_authenticate(9)
• usb4_switch_nvm_authenticate_status(9)
• usb4_switch_credits_init(9)
• usb4_switch_query_dp_resource(9)
• usb4_switch_alloc_dp_resource(9)
• usb4_switch_dealloc_dp_resource(9)
• usb4_port_index(9)
• usb4_switch_map_pcie_down(9)
• usb4_switch_map_usb3_down(9)
• usb4_switch_add_ports(9)
• usb4_switch_remove_ports(9)
• usb4_port_unlock(9)
• usb4_port_hotplug_enable(9)
• usb4_port_reset(9)
• usb4_port_configure(9)
• usb4_port_unconfigure(9)
• usb4_port_configure_xdomain(9)
• usb4_port_unconfigure_xdomain(9)
• usb4_port_sb_read(9)
• usb4_port_sb_write(9)
• usb4_port_router_offline(9)
• usb4_port_router_online(9)
• usb4_port_enumerate_retimers(9)
• usb4_port_clx_supported(9)
• usb4_port_asym_supported(9)
• usb4_port_asym_set_link_width(9)
• usb4_port_asym_start(9)
• usb4_port_margining_caps(9)
• usb4_port_hw_margin(9)
• usb4_port_sw_margin(9)
• usb4_port_sw_margin_errors(9)
• usb4_port_retimer_set_inbound_sbtx(9)
• usb4_port_retimer_unset_inbound_sbtx(9)
• usb4_port_retimer_is_last(9)
• usb4_port_retimer_is_cable(9)
• usb4_port_retimer_nvm_sector_size(9)
• usb4_port_retimer_nvm_set_offset(9)
• usb4_port_retimer_nvm_write(9)
• usb4_port_retimer_nvm_authenticate(9)
• usb4_port_retimer_nvm_authenticate_status(9)
• usb4_port_retimer_nvm_read(9)
• usb4_usb3_port_max_link_rate(9)
• usb4_usb3_port_allocated_bandwidth(9)
• usb4_usb3_port_allocate_bandwidth(9)
• usb4_usb3_port_release_bandwidth(9)
• usb4_dp_port_set_cm_id(9)
• usb4_dp_port_bandwidth_mode_supported(9)
• usb4_dp_port_bandwidth_mode_enabled(9)
• usb4_dp_port_set_cm_bandwidth_mode_supported(9)
• usb4_dp_port_group_id(9)
• usb4_dp_port_set_group_id(9)
• usb4_dp_port_nrd(9)
• usb4_dp_port_set_nrd(9)
• usb4_dp_port_granularity(9)
• usb4_dp_port_set_granularity(9)
• usb4_dp_port_set_estimated_bandwidth(9)
• usb4_dp_port_allocated_bandwidth(9)
• usb4_dp_port_allocate_bandwidth(9)
• usb4_dp_port_requested_bandwidth(9)
• usb4_pci_port_set_ext_encapsulation(9)
• usb4_pci_port_ltssm_state(9)

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okay that's the whole page, no cap, nothing skipped, every single function name preserved with her exact (9) crown on 🧚

signed off from ./drivers/thunderbolt, dated October 2026, living in the Kernel API Manual — mwah, go read some Thunderbolt source bestie 💜