drm_dp_tunne...ble_bw_alloc(9)

💅 NAME 💅

Okay bestie, so this page is from the Kernel API Manual, and the star of the show is drm_dp_tunnel_disable_bw_alloc — literally the function you call to Disable DP tunnel BW allocation mode. That's it, that's the whole vibe. ✨

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🎀 SYNOPSIS 🎀

int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel);

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🌸 ARGUMENTS 🌸

• tunnel — the tunnel object, periodt. That's the thing you're passing in, no cap. 🫶

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🦋 DESCRIPTION 🦋

So what does it actually do? It disables the DP tunnel BW allocation mode on tunnel. Like, turns it off. Off-mode. Goodbye bandwidth-allocating era. 💀

And what does it hand back to you?

• Returns 0 in case of success — slay, we love a clean zero. 👑
• Returns a negative error code otherwise — so if it's negative, something went sideways, ngl. 😭

That's the whole deal, fr fr. No hidden tricks.

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🌈 SEE ALSO 🌈

The kernel file lives at ./drivers/gpu/drm/display/drm_dp_tunnel.c — go read it, it's giving main character energy. 📖✨

And here's the whole tunnel friend group, all of them iconic:

• 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_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_set_stream_bw(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)

💡 Pro bestie move: drm_dp_tunnel_enable_bw_alloc(9) is the opposite of this one, so if you ever need to turn the mode back on, that's your girl. iykyk.

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✨ okay that's the whole page, mwah ✨

This lil masterpiece comes to you from ./drivers/gpu/drm/display, dated October 2026, and it's filed under drm_dp_tunne...ble_bw_alloc(9) — yes the name is truncated in the corner, she's mysterious like that. 💜🎀🦋