drm_dp_link_train(9)

✨ drm_dp_link_train(9) ✨

okay so bestie, this one's from the Kernel API Manual and it's literally the glow-up moment for your DisplayPort link 🌈

💅 NAME

drm_dp_link_train — perform DisplayPort link training

🎀 SYNOPSIS

int drm_dp_link_train (struct drm_dp_link *link );

🦋 ARGUMENTS

• link — a DP link object 🫶 (yes that's it, she's the whole vibe)

🌸 DESCRIPTION

So what this does is it takes the context stored in that DP link object and uses it to perform link training. Periodt. 💅

Quick heads-up tho: drivers are expected to call drm_dp_link_probe first to obtain the link capabilities, and only then go ahead and do link training. Like, get the deets before you commit, y'know? 🙈

And here's the iconic part — if the sink supports fast link training (which is the no AUX CH handshake version, iykyk) and valid training settings are available, this function will try to do fast link training and then fall back to full link training on failure. She tries the shortcut first but she's got a backup plan, main character energy honestly 👑

⭐ RETURN

0 on success, or a negative error code on failure. That's the vibe check right there 😭

🔥 SEE ALSO

Kernel file ./drivers/gpu/drm/tegra/dp.c

• drm_dp_link_add_rate(9)
• 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)

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🫶 that's the whole page bestie, no cap. this icon lives in ./drivers/gpu/drm/tegra, dated October 2026, and she's page drm_dp_link_train(9) — slay 💖✨