DALSMC_MSG_T...ableSmu2Dram(9)

💅 DALSMC_MSG_T...ableSmu2Dram(9) — Kernel API Manual 💅

okay bestie, welcome to the Kernel API Manual for DALSMC_MSG_T...ableSmu2Dram(9) — yes the title is truncated with ... because apparently even the kernel devs ran out of screen width, and honestly? iconic behavior. 🎀

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✨ NAME ✨

• DALSMC_MSG_TransferTableSmu2Dram — transfers a PMFW table into DRAM. Slay, data goes in. 💖
• DALSMC_MSG_TransferTableDram2Smu — transfers a DRAM buffer into PMFW. And the reverse, we love a two-way street. 🦋

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🌸 SYNOPSIS 🌸

DALSMC_MSG_TransferTableSmu2Dram

no cap, that's the whole synopsis up there. short and confident, main character energy fr fr. 👑

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💜 DESCRIPTION 💜

okay so both directions use the same argument layout — one layout to rule them all, we love efficiency. 🫶

but here's the catch, bestie: the DRAM address must be set beforehand 😭. AddrLow / AddrHigh are the GPU MC address bits [31:0] / [63:32]. like, set them first. before. don't come at it unprepared. 🙈

🦋 the supported tables, per direction

• Smu2Dram supported tables: TABLE_DAL_INIT — that's DPM clocks + UTM QoS + memory config. a whole little bundle, highkey a lot going on. ✨
• Dram2Smu supported tables: TABLE_SOC_UTM — a debug override of UTM QoS parameters. lowkey niche but we respect it. 🍓

🎀 the request fields

• TableId — table identifier (the TABLE_* defines below).
• AddrLow — GPU MC address bits [31:0] of the destination/source buffer.
• AddrHigh — GPU MC address bits [63:32] of the destination/source buffer.

⭐ the response

• (none beyond result code) — that's literally it. no extra tea, you just get your result code back and you move on. 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dalsmc.h — go read the source, iykyk 💅
• DALSMC_MSG_TestMessage(9)
• DALSMC_MSG_GetMsgHeaderVersion(9)
• DALSMC_MSG_SetHardMinByFreq(9)
• DALSMC_MSG_SetMinDeepSleepDcfclk(9)
• DALSMC_MSG_BacoAudioD3PME(9)
• DALSMC_MSG_ReturnHardMinStatus(9)
• DALSMC_MSG_IndicatePstateStatus(9)
• DALSMC_MSG_UpdateUTMQoSRequest(9)
• DALSMC_MSG_SetDisplayIdleOptimizations(9)
• DALSMC_MSG_SetStutterEfficiency(9)
• TABLE_SOC_UTM(9)
• TABLE_DAL_INIT(9)

like the whole friend group showed up to the function-call party 🧚💜

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ok and one tiny vibe-check footnote bestie: this page lives at ./drivers/gpu/drm/amd/display/..., it's dated October 2026, and it's part of the same Kernel API Manual whose name is literally DALSMC_MSG_T...ableSmu2Dram(9). periodt. 💅🔥👑