drm_of_get_data_lanes_count(9)

hiii bestie 💖 okay so this is drm_of_get_data_lanes_count(9) from the Kernel API Manual — the lil helper that gets your DSI/(e)DP data lane count. no cap, it’s giving “count the DT property and check for validity”. let’s get into it ✨

🌟 NAME 🌟

drm_of_get_data_lanes_count - Get DSI/(e)DP data lane count

✨ SYNOPSIS ✨

int drm_of_get_data_lanes_count (const struct device_node *endpoint ,
       const unsigned int min , const unsigned int max );

🎀 ARGUMENTS 🎀

• endpoint — DT endpoint node of the DSI/(e)DP source or sink. that’s the node, bestie.
• min — minimum supported number of data lanes. the lower limit, periodt.
• max — maximum supported number of data lanes. the upper limit, slay.

🦋 DESCRIPTION 🦋

okay so the actual job is: count DT "data-lanes" property elements and check for validity. that’s the whole plot 🎬

💅 RETURN 💅

• min..max — positive integer count of "data-lanes" elements. slay ✨
• -ve — the "data-lanes" property is missing or invalid. oof 😭
• -EINVAL — the "data-lanes" property is unsupported. 💀

🔥 SEE ALSO 🔥

go read these too, bestie 🫶

• Kernel file ./drivers/gpu/drm/drm_of.c overview(9)
• drm_of_crtc_port_mask(9)
• drm_of_find_possible_crtcs(9)
• drm_of_component_match_add(9)
• drm_of_component_probe(9)
• drm_of_get_panel_orientation(9)
• drm_of_find_panel_or_bridge(9)
• drm_of_lvds_get_dual_link_pixel_order(9)
• drm_of_lvds_get_dual_link_pixel_order_sink(9)
• drm_of_lvds_get_data_mapping(9)
• drm_of_get_data_lanes_count_ep(9)
• drm_of_get_data_lanes_count_remote(9)
• drm_of_get_dsi_bus(9)

byeee bestie 🫶 mwah 💋 this page’s source/version is ./drivers/gpu/drm, it’s dated October 2026, and the manual is drm_of_get_data_lanes_count(9). periodt ✨