intel_gt_mcr_unicast_write(9)

💅 intel_gt_mcr_unicast_write(9) 💅

okay so welcome to the Kernel API Manual page for intel_gt_mcr_unicast_write(9), bestie. This is the little function that writes one specific instance of an MCR register, and it is lowkey iconic for knowing exactly which group/instance it wants. ✨

💖 NAME 💖

intel_gt_mcr_unicast_write — write a specific instance of an MCR register. That’s the whole assignment: one register instance, unicast mode, no cap. 🎀

✨ SYNOPSIS ✨

void intel_gt_mcr_unicast_write (struct intel_gt *gt , i915_mcr_reg_t
reg , u32 value , int group , int instance );

🌸 ARGUMENTS 🌸

• gt — the GT structure. Bestie, this is the context object you’re handing over. 🫶
• reg — the MCR register to write. The main character register, fr fr. 👑
• value — value to write. Yep, the actual value going in. 💅
• group — the MCR group. Gotta know your group. 🎀
• instance — the MCR instance. And gotta know your instance too. ✨

🦋 DESCRIPTION 🦋

Write an MCR register in unicast mode after steering toward a specific group/instance. That’s it — that’s the vibe. It knows exactly which group/instance it’s steering toward, then does the write. Slay. 💖

🔥 CONTEXT 🔥

Heads up: calls a function that takes and releases gt->mcr_lock. So yes, the lock is part of the situation — not you doing it manually, the called function handles the take-and-release. 🫡

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/i915/gt/intel_gt_mcr.c
• GT Multicast/Replicated (MCR) Register Support(9)
• intel_gt_mcr_lock(9)
• intel_gt_mcr_unlock(9)
• intel_gt_mcr_lock_sanitize(9)
• intel_gt_mcr_read(9)
• intel_gt_mcr_multicast_write(9)
• intel_gt_mcr_multicast_write_fw(9)
• intel_gt_mcr_multicast_rmw(9)
• intel_gt_mcr_get_nonterminated_steering(9)
• intel_gt_mcr_read_any_fw(9)
• intel_gt_mcr_read_any(9)
• intel_gt_mcr_get_ss_steering(9)
• intel_gt_mcr_wait_for_reg(9)

mwah 💋 — source/version: ./drivers/gpu/drm/i915/gt; date: October 2026; page: intel_gt_mcr_unicast_write(9). 🎀✨