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[BUG] HDA DMA is blocking blcking PC3+ on Intel ACE platforms with context-save #10003

@kv2019i

Description

@kv2019i

Describe the bug
Regression in current main causing SOF to block deeper system sleep states due to HD DMA.

To Reproduce
Test normal playback, observe system package c-state.

Reproduction Rate
100%

Expected behavior
SOF allows system to reached lower (PC3...10) states.

Impact
What impact does this issue have on your progress (e.g., annoyance, showstopper)

Environment

  1. Branch name and commit hash of the 2 repositories: sof (firmware/topology) and linux (kernel driver).
    • Kernel: daily 2025-05-12
    • SOF: daily 2025-05-15
  2. Name of the topology file
    • Topology: any
  3. Name of the platform(s) on which the bug is observed.
    • Platform: lnl, ptl

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LNLApplies to Lunar Lake platformP2Critical bugs or normal featuresPTLIntel Panther Lake platformbugSomething isn't working as expected

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