dc_dmub_srv...terrupt_dest(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dc_dmub_srv_ihc_set_dig_hdcp_interrupt_dest — like, the IHC interrupt destination glow-up

okay so bestie, welcome to the Kernel API Manual ✨ and specifically to this little function that handles where HDCP I2C interrupt requests get routed. it's giving "tiny function, very specific job" and honestly? we respect it. 🎀

🦋 NAME

dc_dmub_srv_ihc_set_dig_hdcp_interrupt_dest — configure the IHC interrupt destination, no cap.

✨ SYNOPSIS

bool dc_dmub_srv_ihc_set_dig_hdcp_interrupt_dest (struct dc_dmub_srv *dc_dmub_srv , uint8_t dig_id , bool to_dmu );

🌸 ARGUMENTS

  • dc_dmub_srv — the DMUB service handle, like your little all-access pass to the firmware 💖
  • dig_id — the DIG engine ID, and it's literally 0-3 (only those four, bestie, don't get creative)
  • to_dmu — route the interrupt to DMU when true, or don't when false 🙈

💜 DESCRIPTION

so what it does is: it sends a command to the DMUB firmware to configure the IHC interrupt routing for HDCP I2C transfer requests. that's the whole vibe. it's a messenger — it takes your request and hands it off to firmware to get the routing set up. 🧚

🔥 RETURN

true on success, false on failure. iconic binary behavior, honestly. 👑

🌈 SEE ALSO

the kernel file lives at ./drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h — go say hi to it 🫶

and here's the whole friend group, all at section (9):

ngl this one's short and sweet, which is exactly the energy we love. read the args, pass the args, get your bool, move on. slay. 💅

and that's the page!! mwah 💋 this came out of ./drivers/gpu/drm/amd/display/dc in October 2026 — catch you on the next one, bestie 🦋🌸

📦 where this page comes from