usb4_dp_por...de_supported(9)

✨ usb4_dp_port_bandwidth_mode_supported(9) ✨

okay so bestie, we're deep in the Kernel API Manual today (like, the 9 section, kernel internals, very main character) and the star of the show is usb4_dp_port_bandwidth_mode_supported. real ones know 💅

---

🌸 NAME 🌸

usb4_dp_port_bandwidth_mode_supported — literally just answers "does this thing support bandwidth allocation mode or not" 💖

---

🦋 SYNOPSIS 🦋

bool usb4_dp_port_bandwidth_mode_supported(struct tb_port *port);

---

🎀 ARGUMENTS 🎀

• port — the DP IN adapter you wanna check, bestie 👀

---

⭐ DESCRIPTION ⭐

no cap, you can call this on any DP IN adapter. that's it, that's the whole vibe. 🫶

---

🔥 RETURN 🔥

• true — slay, the adapter supports USB4 bandwidth allocation mode ✨
• false — nope, it does not, we move on 💀

---

👑 SEE ALSO 👑

okay so this part is lowkey a whole friend group, and not me listing every single one because we do not gatekeep here:

• Kernel file ./drivers/thunderbolt/usb4.c
• 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_lane_bonding_possible(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_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)

---

💜 lowkey obsessed with the fact that they all live in ./drivers/thunderbolt. that's the whole neighborhood, periodt.

---

and that's the page bestie!! 🎀 brought to you by the fine people over at ./drivers/thunderbolt, stamped October 2026, from the Kernel API Manual — see u in section 9 fr fr 💅✨🦋