dc_get_host_router_index(9)

💅 dc_get_host_router_index(9) — the Kernel API Manual glow-up ✨

okay so bestie, this is a page from the Kernel API Manual (yes, section 9, the big-kid section) and it's literally all about dc_get_host_router_index. it's tiny, it's cute, it's giving "one job and it does it." let's get into it 🎀

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🌸 NAME 🌸

dc_get_host_router_index — get the index of a host router from a dpia link 💫

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✨ SYNOPSIS ✨

bool dc_get_host_router_index (const struct dc_link *link , unsigned int
*host_router_index );

that's the whole signature, no cap. returns a bool, takes two args, and one of them is a pointer-to-pointer situation (well, pointer-to-unsigned int, close enough). 🔥

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🦋 ARGUMENTS 🦋

• link — pointer to the target link. this one is input only, she's just here to be read from, main character energy but make it read-only. 👑
• host_router_index — pointer to where you want the host router index of the target link stashed. this one is output, so she's the one getting written to. 💖

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💜 DESCRIPTION 💜

so this function returns a host router index of the target link — and it does that when the target link is a dpia link. literally that's the vibe check. 🫶

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🍓 RETURN 🍓

true — if the host router index is found and valid. that's the slay condition, both boxes gotta be checked bestie ✅✨

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🧚 SEE ALSO 🧚

the friend group, the whole group chat, everybody's invited 💅:

• Kernel file ./drivers/gpu/drm/amd/display/dc/core/dc.c Overview(9)
• dc_stream_get_last_used_drr_vtotal(9)
• dc_stream_configure_crc(9)
• dc_stream_get_crc(9)
• dc_stream_adjust_vmin_vmax(9)
• dc_commit_state_no_check(9)
• dc_commit_streams(9)
• dc_check_state_update(9)
• dc_check_update_surfaces_for_stream(9)
• update_seamless_boot_flags(9)
• update_planes_and_stream_state(9)
• dc_check_address_only_update(9)
• build_dmub_cmd_list(9)
• could_mpcc_tree_change_for_active_pipes(9)
• commit_minimal_transition_state_in_dc_update(9)
• commit_minimal_transition_state(9)
• dc_update_state(9)
• dc_update_planes_and_stream(9)
• dc_enable_dcmode_clk_limit(9)
• dc_is_dmub_outbox_supported(9)
• dc_enable_dmub_notifications(9)
• dc_enable_dmub_outbox(9)
• dc_process_dmub_aux_transfer_async(9)
• dc_process_dmub_set_config_async(9)
• dc_process_dmub_set_mst_slots(9)
• dc_process_dmub_dpia_set_tps_notification(9)
• dc_process_dmub_dpia_hpd_int_enable(9)
• dc_print_dmub_diagnostic_data(9)
• dc_disable_accelerated_mode(9)
• dc_notify_vsync_int_state(9)
• dc_set_edp_power(9)
• dc_get_power_profile_for_dc_state(9)
• dc_get_det_buffer_size_from_state(9)
• should_commit_intermediate_context(9)
• dc_update_probes_prepare(9)
• dc_update_probes_execute(9)

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ok that's the entire page bestie, no filler, no lore, just vibes and a bool 🌈

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and that's a wrap!! 🎀 this iconic little page lives at ./drivers/gpu/drm/amd/display/..., dated October 2026, and it's filed under dc_get_host_router_index(9) in the Kernel API Manual. mwah, go read a dc_process_dmub_* page next, ily 💖