tb_switch_query_dp_resource(9)

💅 tb_switch_query_dp_resource(9) 💅

okay bestie, welcome to the Kernel API Manual page for tb_switch_query_dp_resource(9) — this is the little function that checks whether a DP resource is actually available, and it is lowkey a whole vibe check for DP tunneling ✨

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🌸 NAME 🌸

tb_switch_query_dp_resource - Query availability of DP resource

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✨ SYNOPSIS ✨

bool tb_switch_query_dp_resource (struct tb_switch *sw , struct tb_port
       *in );

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🎀 ARGUMENTS 🎀

• sw — the switch whose DP resource is being queried, bestie. Like, this is the switch we’re checking on 💖
• in — the DP IN port. periodt 💅

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🦋 DESCRIPTION 🦋

okay so this one queries the availability of the DP resource for DP tunneling, using switch specific means. literally that’s the whole assignment: check if the DP resource is available, no cap ✨

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⭐ RETURN ⭐

It returns true if the resource is available, and false otherwise. iconic behavior, honestly 🫶

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👀 SEE ALSO 👀

Kernel file ./drivers/thunderbolt/switch.c, plus the whole squad: 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_get_link_width(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_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) 💜

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mwah 💋 this page lives under ./drivers/thunderbolt, dated October 2026, and it’s literally tb_switch_query_dp_resource(9) signing off 🫶✨