GPU voltage control
spezi77 opened this issue · comments
This feature is currently only supported by Synapse. Would be nice to have it in KA-mod as well.
see:
https://github.com/apbaxel/UKM/blob/UKM-Enhanced/data/UKM/config.json.generate.gpu
Looks like the only part of that which is pertinent is:
`if [ -f "/sys/devices/system/cpu/cpu0/cpufreq/gpu_mv_table" ]; then
$BB echo '{ SPane:{
title:"GPU Voltages"
}},'
while read UVOLT UNIT; do
VOLTAGE=$(($VOLTAGE+1));
$BB echo '{ SSeekBar:{
default:'$UVOLT',
title:"Voltage '${VOLTAGE}'",
action:"voltage gpuvolt '${VOLTAGE}'",
unit:"' ${UNIT}'",'
if [ "$UVOLT" -ge "900000" ]; then
$BB echo 'min:900000, max:1200000, step:5000 }},'
else
$BB echo 'min:900, max:1200, step:5 }},'
fi;
done < /sys/devices/system/cpu/cpu0/cpufreq/gpu_mv_table
fi`
I'll see if I can't add it. Though, I'm not entirely sure exactly how I'm going to get it going reliably for all devices.
Also, I don't even know of any kernels that actually use this... and I'd also need an example of the sysfs node that this references.
Sorry for my late reply. I can provide an example of the sysfs node until the weekend. I have merged 'GPU voltage control' into my 'Revival kernel' for mako. ;)
Basically it is a nice addition for Snapdragon/adreno based devices with custom kernel. There are a few custom kernels out there with this feature, but I can't remember exactly which ones.
No worries. If you can provide the examples, I'll try to add it.
When I make an ouput of the sysfs node I get a vector with these defaults:
shell@:/ $ cat /sys/devices/system/cpu/cpu0/cpufreq/gpu_mv_table
945 mV
1050 mV
1150 mV
Do you need the max and min values, as well? I need to look into the source code to figure out..
Here we go. I couldn't find where they define the steps. So I assume that it can be defined as we need it (e.g.: 5mV).
#define GPU_MIN_VDD 900
#define GPU_MAX_VDD 1200