DALSMC_MSG_U...TMQoSRequest(9)

💖 NAME 💖

Okay bestie, welcome to the DALSMC_MSG_U...TMQoSRequest(9) page from the Kernel API Manual — the main character here is DALSMC_MSG_UpdateUTMQoSRequest, and its whole job is: Update the active UTM QoS bandwidth/latency request. slay 🎀

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✨ SYNOPSIS ✨

DALSMC_MSG_UpdateUTMQoSRequest

Literally just that in the synopsis, no extra args shown — it’s giving minimal icon behavior 💅.

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🦋 DESCRIPTION 🦋

So here’s the tea, bestie: DALSMC_MSG_UpdateUTMQoSRequest passes the current display bandwidth and latency requirements to PMFW so it can select the appropriate SoC operating point (UCLK/FCLK level) from the UTM table. Highkey important: it’s called whenever the display configuration changes. 🔥

The QoS requirement must take effect before PMFW sends its response. No cap — that ordering is serious, fr fr. ⏳

Request:

• LatencySopIndex — index into the UTM SOP table that satisfies latency
• NominalBandwidthKBps — required nominal (average) bandwidth in KB/s
• UrgentBandwidthKBps — required urgent bandwidth in KB/s
• LsdmaBandwidthKBps — required LSDMA bandwidth in KB/s

Response: (none beyond result code) — nothing extra comes back beyond the result code, periodt. 🙈

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🌈 SEE ALSO 🌈

The related bestie squad, iykyk:

• Kernel file ./drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dalsmc.h
• DALSMC_MSG_TestMessage(9)
• DALSMC_MSG_GetMsgHeaderVersion(9)
• DALSMC_MSG_TransferTableSmu2Dram(9)
• DALSMC_MSG_SetHardMinByFreq(9)
• DALSMC_MSG_SetMinDeepSleepDcfclk(9)
• DALSMC_MSG_BacoAudioD3PME(9)
• DALSMC_MSG_ReturnHardMinStatus(9)
• DALSMC_MSG_IndicatePstateStatus(9)
• DALSMC_MSG_SetDisplayIdleOptimizations(9)
• DALSMC_MSG_SetStutterEfficiency(9)
• TABLE_SOC_UTM(9)
• TABLE_DAL_INIT(9)

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And that’s the page, bestie 🫶 — footer energy: source/version is ./drivers/gpu/drm/amd/display/..., date is October 2026, and the footer page name is DALSMC_MSG_U...TMQoSRequest(9). Byeee 💖✨