83 lines
3.6 KiB
Markdown
83 lines
3.6 KiB
Markdown
# PowerTools
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Steam Deck power tweaks for power users.
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This is generated from the template plugin for the [SteamOS Plugin Loader](https://github.com/SteamDeckHomebrew/PluginLoader).
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You will need that installed for this plugin to work.
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## What does it do?
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- Enable & disable CPU threads & SMT
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- Set CPU max frequency and toggle boost
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- Set some GPU power parameters (fastPPT & slowPPT)
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- Set the fan RPM (unsupported on SteamOS beta)
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- Display supplementary battery info
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## Cool, but that's too much work
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Fair enough.
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In case you still want some of the functionality, without the nice GUI, here's some equivalent commands.
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These should all be run as superuser, i.e. run `sudo su` and then run these commands in that.
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### Enable & Disable CPU threads
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Enable: `echo 1 > /sys/devices/system/cpu/cpu{cpu_number}/online` where `{cpu_number}` is a number from 1 to 7 (inclusive).
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Disable: `echo 0 > /sys/devices/system/cpu/cpu{cpu_number}/online` where `{cpu_number}` is a number from 1 to 7 (inclusive).
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NOTE: You cannot enable or disable cpu0, hence why there are only 7 in the range for 8 cpu threads.
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### Enable & Disable CPU boost
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Enable: `echo 1 > /sys/devices/system/cpu/cpufreq/boost` enables boost across all threads.
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Disable: `echo 0 > /sys/devices/system/cpu/cpufreq/boost` disables boost across all threads.
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### Set CPU frequency
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Use `cpupower` (usage: `cpupower --help`).
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This isn't strictly how PowerTools does it, but it's a multi-step process which can involve changing the CPU governor.
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All that can be done automatically by `cpupower frequency-set --freq {frequency}` where `{frequency}` is `1.7G`, `2.4G` or `2.8G`.
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### Set GPU Power
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Set Slow Powerplay Table (PPT):`echo {microwatts} > /sys/class/hwmon/hwmon4/power1_cap` where `{microwatts}` is a wattage in millionths of a Watt. This doesn't seem to do a lot.
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Set Fast Powerplay Table (PPT): `echo {microwatts} > /sys/class/hwmon/hwmon4/power2_cap` where `{microwatts}` is a wattage in millionths of a Watt.
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Get the entry limits for those two commands with `cat /sys/class/hwmon/hwmon4/power{number}_cap_max` where `{number}` is `1` (slowPPT) or `2` (fastPPT).
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### Set Fan speed
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Enable automatic control: `echo 0 > /sys/class/hwmon/hwmon5/recalculate` enables automatic fan control.
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Disable automatic control: `echo 1 > /sys/class/hwmon/hwmon5/recalculate` disables automatic (temperature-based) fan control and starts using the set fan target instead.
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Set the fan speed: `echo {rpm} > /sys/class/hwmon/hwmon5/fan1_target` where `{rpm}` is the RPM.
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Read the actual fan RPM: `cat /sys/class/hwmon/hwmon5/fan1_input` gives the fan speed.
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NOTE: There's a bug in the fan controller; if you enable automatic fan control it will forget any previously-set target despite it appearing to be set correctly (i.e. `cat /sys/class/hwmon/hwmon5/fan1_target` will display the correct value).
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When you disable automatic fan control, you will need to set the fan RPM again.
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### Battery stats
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Get the battery charge right now: `cat /sys/class/hwmon/hwmon2/device/charge_now` gives charge in uAh (uAh * 7.7/1000000 = charge in Wh).
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Get the maximum battery capacity: `cat /sys/class/hwmon/hwmon2/device/charge_full` gives charge in uAh.
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Get the design battery capacity: `cat /sys/class/hwmon/hwmon2/device/charge_full_design` gives charge in uAh.
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Get whether the deck is plugged in: `cat /sys/class/hwmon/hwmon5/curr1_input` gives the charger current in mA.
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### Steam Deck kernel patches
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This is how I figured out how the fan stuff works.
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I've only scratched the surface of what this code allows, I'm sure it has more useful information.
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https://lkml.org/lkml/2022/2/5/391
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## License
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This is licensed under GNU GPLv3.
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