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Allow ACPI to set fan speeds #309

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Allow ACPI to set fan speeds #309

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@curiousercreative curiousercreative commented Oct 17, 2022 •
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  • Relays ACPI writes to ACPI fan variables
  • Fan speeds will be a smoothed maximum of what EC would set and what ACPI has requested.
  • Needs testing, ACPI requested speeds that differ when multiple fans present may override the EC fan syncing, which should be okay. If userspace wants control, allow them to control the fan speeds independently.

Futher discussion/consideration should be had on:

  • Should EC set fan speed floors or not spin fans at all? I currently have EC set floors.
  • Should EC be responsible for smoothing fan speeds when ACPI values are used? I currently have EC smoothing always, but this yields poor pwmconfig detection. A PR exists for not smoothing ACPI values here
  • Depending on the above, we should revisit the existing fan curves and perhaps make them far more conservative and push any fan speed "performance" concerns to userspace.

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@curiousercreative curiousercreative marked this pull request as ready for review October 17, 2022 17:31
This was referenced Oct 17, 2022
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@curiousercreative curiousercreative mentioned this pull request Oct 18, 2022
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@crawfxrd crawfxrd requested review from jackpot51 and a team January 19, 2023 16:24
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rebased and tested on my galp5

ilikenwf added a commit to ilikenwf/ec that referenced this pull request Sep 11, 2023
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https://github.com/system76/ec/pull/309
e42ae14
@curiousercreative
allow ACPI to set fan speeds
55bc539 
Smooth ACPI fan pwm values same as EC fan curve points
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