drm_dp_tunn...ams_in_state(9)

💖 drm_dp_tunn...ams_in_state(9) — Kernel API Manual 💖

okay so bestie, welcome to the glow-up edition of the kernel API manual ✨ this one lives in the DRM department and the star of the show is drm_dp_tunnel_atomic_get_group_streams_in_state — iconic name, i know, the header up top had to abbreviate it because it's literally too long to fit 😭 anyway. she's a real function, she's in the kernel, and we're gonna get you acquainted 🫶

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✨ NAME ✨

drm_dp_tunnel_atomic_get_group_streams_in_state — get the mask of stream IDs in a group 💅

like, that's it. that's the whole job. she fetches you the mask. no cap.

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🌸 SYNOPSIS 🌸

int drm_dp_tunnel_atomic_get_group_streams_in_state (struct
       drm_atomic_commit *state , const struct drm_dp_tunnel *tunnel , u32
       *stream_mask );

three (3) little parameters, one big slay ⭐

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🎀 ARGUMENTS 🎀

• state — the atomic state. yep, the commit state, she's coming along for the ride 💫
• tunnel — the tunnel object. your main character, fr fr 🚇
• stream_mask — the mask of streams in the tunnel's group. this is the output, she's the one you're here for 👑

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💜 DESCRIPTION 💜

okay so here's the tea 🍓 — this function gets you the mask of all the stream IDs in the tunnel group of tunnel. that's the whole vibe. group streams → mask → you. simple, clean, no drama.

and on the return tip: you get 0 in case of success — with the stream IDs dropped right into stream_mask for you 💖 — or a negative error code in case of failure 😭. that's it. that's the contract. success gives you 0 and the goods, failure gives you a negative number and no goods.

lowkey important: the stream IDs only land in stream_mask when it works. negative error code means check yourself before you wreck yourself 🫶

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🦋 SEE ALSO 🦋

the whole friend group, honestly. go say hi to all of them 💅:

• Kernel file ./drivers/gpu/drm/display/drm_dp_tunnel.c
• 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_set_stream_bw(9)
• drm_dp_tunnel_atomic_get_required_bw(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 whole page bestie, you ate that 💅✨ this lil number lives over in ./drivers/gpu/drm/display and she's dated October 2026 — so she's serving future-vibes only 🌈👑 mwah, go read the kernel file, ily 🫶💖