drm_dp_read_lttpr_phy_caps(9)

📦 version 7.3.1, in nixpkgs unstable

💖 drm_dp_read_lttpr_phy_caps(9) — Kernel API Manual 💖

okay bestie, welcome to the group chat for this page from the Kernel API Manual ✨ it's giving kernel display-helper realness, and we're here to read the capabilities for one specific LTTPR PHY. no cap.

✨ NAME ✨

drm_dp_read_lttpr_phy_caps — read the capabilities for a given LTTPR PHY 💅

🌸 SYNOPSIS 🌸

int drm_dp_read_lttpr_phy_caps (struct drm_dp_aux *aux , const u8
dpcd[DP_RECEIVER_CAP_SIZE] , enum drm_dp_phy dp_phy , u8
caps[DP_LTTPR_PHY_CAP_SIZE] );

🎀 ARGUMENTS 🎀

  • aux — DisplayPort AUX channel. literally the AUX channel, bestie 💫
  • dpcd — DisplayPort configuration data. the config data, periodt.
  • dp_phy — LTTPR PHY to read the capabilities for. this is the one we're reading about 👑
  • caps — buffer to return the capability info in. it's where the capability info goes, slay 🫶

🦋 DESCRIPTION 🦋

Read the capabilities for the given LTTPR PHY. that's the whole quest 💖

It returns 0 on success or a negative error code on failure. so yes: success is 0, failure is a negative error code, and there is no in-between main-character nonsense here 😭

🌈 SEE ALSO 🌈

the whole squad of related pages, no cap:

okay that's the page, bestie 💖 source/version vibes: ./drivers/gpu/drm/display, dated October 2026, and the page is drm_dp_read_lttpr_phy_caps(9). bye and slay ✨🦋

📦 where this page comes from