dcn60_smu_wait_for_response(9)

💅 dcn60_smu_wait_for_response(9)

okay so bestie, this is a page from the Kernel API Manual and honestly? it's a little niche but it's so useful once you get it. like, it's giving "small function, big responsibility" energy ✨

🎀 NAME 🎀

dcn60_smu_wait_for_response — literally just polls DAL_RESP_REG until it's non-zero. that's it. that's the whole vibe. no cap. 🫶

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🌸 SYNOPSIS 🌸

uint32_t dcn60_smu_wait_for_response (struct clk_mgr_internal *clk_mgr ,
unsigned int delay_us , unsigned int max_retries , unsigned int
*total_delay_us );

bestie look at that signature, four whole parameters, she's thorough 💅

🦋 ARGUMENTS 🦋

• clk_mgr — the clock manager instance, aka the main character of this whole operation 👑
• delay_us — how many microseconds to wait between each poll iteration. like a lil breather between "u up?" texts 😭
• max_retries — the maximum number of poll iterations before it gives up entirely. we all have our limits, and this is hers 🙈
• total_delay_us — if it's non-NULL, it accumulates the total poll delay. if it's NULL, she simply doesn't keep score, and honestly? respect ✨

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💖 DESCRIPTION 💖

okay so here's the thing. we cannot use REG_WAIT here, and the reason is lowkey iconic: the condition we're checking is "not equal to zero", and the translation in msg_if.h is simply incompatible with REG_WAIT. like they don't vibe. they can't sit at the same table. it's not happening 💀

so yeah, we poll manually. slay. 🔥

fr fr this is not a "use REG_WAIT and move on" situation — the incompatibility is real and you have to respect it.

⭐ RETURN ⭐

returns the RESP_REG value, bestie 💖

• non-zero on success (she ate 👑)
• 0 on timeout (and that's the sad part 😭)

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dcn60_clk_mgr_smu_msg.c — go read it, it's right there, iykyk 🧚
• dcn60_smu_send_msg_with_args(9) — her bestie, her partner in crime 🫶

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mwah 💋 this little page lives at ./drivers/gpu/drm/amd/display/... and it was dated October 2026 — so yeah, technically she's from the future, and we're obsessed ⭐🌸💜