drm_of_lvds..._pixel_order(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 drm_of_lvds..._pixel_order(9) 🌸

okay bestie, welcome to the Kernel API Manual 💖 this one's about drm_of_lvds_get_dual_link_pixel_order and honestly? it's giving "matchmaker for pixels" energy and i'm obsessed.

✨ NAME ✨

drm_of_lvds_get_dual_link_pixel_order — get the LVDS dual-link source pixel order, no cap 🎀

✨ SYNOPSIS ✨

int drm_of_lvds_get_dual_link_pixel_order (const struct device_node
*port1 , const struct device_node *port2 );

✨ ARGUMENTS ✨

  • port1 — the first DT port node of the Dual-link LVDS source, bestie 🫶
  • port2 — the second DT port node of the Dual-link LVDS source, its literal partner in crime 💅

✨ DESCRIPTION ✨

so. an LVDS dual-link connection is made of two links, right? and the way it works is: even pixels transit on one link, and odd pixels transit on the other link. that's just the vibe 🌈

this function returns, for two ports of an LVDS dual-link source, which port shall transmit the even and odd pixels, based on the requirements of the connected sink. it's literally doing a vibe check on behalf of the sink 👑

the pixel order is determined from the dual-lvds-even-pixels and dual-lvds-odd-pixels properties in the sink's DT port nodes. if those properties are not present, or if their usage is not valid, this function returns -EINVAL 😭

if either port is not connected, this function returns -EPIPE. not me crying in pipe error 💀

port1 and port2 are typically DT sibling nodes, but may have different parents when, for instance, two separate LVDS encoders carry the even and odd pixels. found family fr fr 🧚

✨ RETURN ✨

  • DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS — port1 carries even pixels and port2 carries odd pixels ✨
  • DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS — port1 carries odd pixels and port2 carries even pixels 🔥
  • -EINVAL — port1 and port2 are not connected to a dual-link LVDS sink, or the sink configuration is invalid 🙈
  • -EPIPE — when port1 or port2 are not connected 💀

✨ SEE ALSO ✨

go check out the Kernel file ./drivers/gpu/drm/drm_of.c overview(9) for the whole lore, plus these iconic siblings 💜

🎀 tiny heads-up bestie: if you're getting -EINVAL or -EPIPE back, that's the function telling you the sink config or the connection isn't it. read the return values again, don't come for me 💅

and that's the whole page, periodt 🌟 this icon lives in ./drivers/gpu/drm, and the date on this masterpiece is October 2026 — screenshot it, frame it, it's iconic 👑💖

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