drm_dp_tunne...et_stream_bw(9)

💅 NAME 💅

drm_dp_tunnel_atomic_set_stream_bw — okay so this is the one that sets the BW (bandwidth, bestie) for a DP tunnel stream ✨ it lives in the Kernel API Manual, no cap

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🌸 SYNOPSIS 🌸

int drm_dp_tunnel_atomic_set_stream_bw (struct drm_atomic_commit *state
, struct drm_dp_tunnel *tunnel , u8 stream_id , int bw );

Like, that's the whole vibe right there 👑 it takes state, tunnel, stream_id and bw, and it hands you back an int. That's it. That's the function. 🎀

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🦋 ARGUMENTS 🦋

• state — the atomic state, literally the main character of this whole operation 💫
• tunnel — the DP tunnel that's holding the stream, it's giving container energy 🫶
• stream_id — the stream ID, the little name tag so we know which stream we're talking about 🏷️
• bw — the BW of the stream, iykyk 💅

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✨ DESCRIPTION ✨

So what it does: it sets a DP tunnel stream's required BW in the atomic state. That's the whole thing. Iconic, honestly. 🎀

It returns 0 when everything slays, and a negative error code otherwise 😭 so like, check that return value, bestie, don't just ignore it fr fr.

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🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/display/drm_dp_tunnel.c — go read it, it ate 💖

The whole friend group, no one left out:

• drm_dp_tunnel_get(9)
• drm_dp_tunnel_put(9)
• drm_dp_tunnel_set_io_error(9)
• drm_dp_tunnel_detect(9)
• drm_dp_tunnel_destroy(9)
• drm_dp_tunnel_enable_bw_alloc(9)
• drm_dp_tunnel_disable_bw_alloc(9)
• drm_dp_tunnel_bw_alloc_is_enabled(9)
• drm_dp_tunnel_pr_optimization_supported(9)
• drm_dp_tunnel_alloc_bw(9)
• drm_dp_tunnel_get_allocated_bw(9)
• drm_dp_tunnel_update_state(9)
• drm_dp_tunnel_128b132b_supported(9)
• drm_dp_tunnel_128b132b_lane0_mapping_supported(9)
• drm_dp_tunnel_128b132b_dprx_rates(9)
• drm_dp_tunnel_max_dprx_rate(9)
• drm_dp_tunnel_max_dprx_lane_count(9)
• drm_dp_tunnel_available_bw(9)
• drm_dp_tunnel_atomic_get_state(9)
• drm_dp_tunnel_atomic_get_old_state(9)
• drm_dp_tunnel_atomic_get_new_state(9)
• drm_dp_tunnel_atomic_get_required_bw(9)
• drm_dp_tunnel_atomic_get_group_streams_in_state(9)
• drm_dp_tunnel_atomic_check_stream_bws(9)
• drm_dp_tunnel_mgr_create(9)
• drm_dp_tunnel_mgr_destroy(9)

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🫶 and that's the page!! sourced from ./drivers/gpu/drm/display, dated October 2026, part of the Kernel API Manual — the header was stylin' as drm_dp_tunne...et_stream_bw(9) and the footer matched it exactly, so we keep that energy 💜 mwah, go set some bandwidth bestie 🧚‍♀️🌸