drm_dp_link_add_rate(9)

💅 drm_dp_link_add_rate(9) 💅

okay bestie, so this one lives in the Kernel API Manual and honestly? it's giving "tiny but crucial". let's get into it ✨

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🌸 NAME 🌸

drm_dp_link_add_rate — bestie, this is the function that adds a rate to the list of supported rates. that's it, that's the whole vibe. 🎀

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🦋 SYNOPSIS 🦋

int drm_dp_link_add_rate (struct drm_dp_link *link , unsigned long rate );

like yes, two args, one int back. iconic, lowkey minimal. 🫶

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💜 ARGUMENTS 💜

• link — the link you're adding the rate to. this is the main character of the operation ngl 🎀
• rate — the rate itself, the thing being added. the little guest of honour ✨

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🔥 DESCRIPTION 🔥

okay so the move here is simple and gorgeous: you take a link rate and you add it to the list of supported link rates. that's the whole function, no cap. 💅

see also: drm_dp_link_remove_rate — yeah that's the opposite one, the "actually nevermind" counterpart 💀

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👑 RETURN 👑

so on success you get 0, slay. but if things go sideways you get one of these negative error codes, and you will be told about it:

• ENOSPC — this happens if the maximum number of supported rates has been reached. like the list is full, the club is at capacity, no more entries bestie 😭
• EEXISTS — this one fires if the link already supports this rate. girl it's already there, we been knew 🙈

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🌈 SEE ALSO 🌈

kernel file ./drivers/gpu/drm/tegra/dp.c — yeah, that's where the magic lives, go look 🧚

and the whole friend group:

• drm_dp_link_remove_rate(9)
• drm_dp_link_update_rates(9)
• drm_dp_link_probe(9)
• drm_dp_link_configure(9)
• drm_dp_link_choose(9)
• Link training(9)
• drm_dp_link_train_init(9)
• drm_dp_link_train(9)

they all hang out together, iykyk 💖

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and that's the page!! brought to you by the source at ./drivers/gpu/drm/tegra, dated October 2026 — mwah, love u, go add those rates responsibly ⭐🍓💜