STRUCT HDCP_PORT_DATA(9)

🌸 struct hdcp_port_data(9) 🌸

okay bestie, welcome to the Kernel API Manual — this one's all about struct hdcp_port_data, aka the intel specific HDCP port data struct. it's giving very niche, very i915, very "you either know or you don't" 💅

✨ NAME ✨

struct hdcp_port_data — intel specific HDCP port data 🎀

🦋 SYNOPSIS 🦋

struct hdcp_port_data {
    enum hdcp_ddi hdcp_ddi;
    enum hdcp_transcoder hdcp_transcoder;
    u8 port_type;
    u8 protocol;
    u16 k;
    u32 seq_num_m;
    struct hdcp2_streamid_type *streams;
 };

no cap, that's the whole shape of it — copy it exactly, don't go editing field names, the compiler WILL notice 😭

👑 Members 👑

• hdcp_ddi — the ddi index, as per ME/GSC FW. fr fr, that's where the number comes from 🫶
• hdcp_transcoder — the transcoder index, also as per ME/GSC FW ✨
• port_type — the HDCP port type, classified as per ME/GSC FW 🌸
• protocol — the HDCP adaptation, as per ME/GSC FW 💜
• k — number of streams transmitted on a port. heads up: it's only on DP MST that this is != 1 👀
• seq_num_m — count of RepeaterAuth_Stream_Manage msgs propagated. it gets initialized to 0 on AKE_INIT, then incremented after every successful transmission of the RepeaterAuth_Stream_Manage message. and the second it rolls over? re-Auth has to be triggered 💀 don't sleep on that
• streams — struct hdcp2_streamid_type[k]. defines the type and id for the streams 🦋

🔥 SEE ALSO 🔥

• Kernel file ./include/drm/intel/i915_hdcp_interface.h
• enum hdcp_port_type(9)
• enum hdcp_wired_protocol(9)
• enum hdcp_transcoder(9)
• struct i915_hdcp_ops(9)
• struct i915_hdcp_arbiter(9)

like, go read those next, bestie, they're the whole friend group 👑

mwah 💋 this page lives at ./include/drm/intel, dated October 2026 — that's the source, the version and the date all in one cute little sign-off. now go forth and HDCP responsibly ✨🎀