STRUCT DRM_DP_LINK(9)

💖 NAME 💖

struct drm_dp_link — the whole vibe of a DP link, like, its capabilities and its configuration, bestie 💅

okay so real talk, this is a page from the Kernel API Manual — yes, the drm_dp_link(9) one, you're in the right place 🫶

✨ SYNOPSIS ✨

struct drm_dp_link {
    unsigned char revision;
    unsigned int max_rate;
    unsigned int max_lanes;
    struct drm_dp_link_caps caps;
    struct {
      unsigned int cr;
      unsigned int ce;
    } aux_rd_interval;
    unsigned char edp;
    unsigned int rate;
    unsigned int lanes;
    unsigned long rates[DP_MAX_SUPPORTED_RATES];
    unsigned int num_rates;
    const struct drm_dp_link_ops *ops;
    struct drm_dp_aux *aux;
    struct drm_dp_link_train train;
};

like, that's the whole struct, no cap 🧚

🎀 Members 🎀

okay bestie, field-by-field, let's go 👑

• revision — the DP specification revision that's supported on the link 🔥
• max_rate — the maximum clock rate supported on the link, literally the ceiling ⭐
• max_lanes — the maximum number of lanes supported on the link 🌈
• caps — the capabilities supported on the link (peep drm_dp_link_caps for the deets) 💜
• aux_rd_interval — the AUX read interval to use for training, measured in microseconds ⏱️
  • aux_rd_interval.cr — the clock recovery read interval 🕐
  • aux_rd_interval.ce — the channel equalization read interval 🕑
• edp — the eDP revision (0x11: eDP 1.1, 0x12: eDP 1.2, ...) 🦋
• rate — the link rate that's currently configured 💫
• lanes — the number of lanes that's currently configured 🛣️
• rates — additional supported link rates in kHz (eDP 1.4) 📈
• num_rates — how many of those additional supported link rates there are (eDP 1.4) 🔢
• ops — the DP link operations 🛠️
• aux — the DP AUX channel 📡
• train — the DP link training state 🚂

ngl, rates and num_rates are a package deal — one's the array, one's the count, don't @ me 🙈

🌸 SEE ALSO 🌸

• Kernel file ./drivers/gpu/drm/tegra/dp.h
• struct drm_dp_link_caps(9)
• struct drm_dp_link_ops(9)
• struct drm_dp_link_train_set(9)
• struct drm_dp_link_train(9)

go read those too, iykyk 📚

that's the whole page, mwah 💋 — brought to you by the source at ./drivers/gpu/drm/tegra, version October 2026, and yes struct drm_dp_link(9) is still the main character 👑✨