#!/bin/bash
# script for tuned AMDGPU clock control
# configures GPU power/clock characteristics
# clocks/power in 3D are dynamic based on need/usage
#
# rendered by Ansible with environment-appropriate values:
#   card #, eg: card0
#   path to discovered sysfs device files (power/clock/voltage control)
#
# this sets the minimums / maximums for a specific generation of GPU
# settings may need adjusted
#
# AMDGPU driver/sysfs references:
#   https://01.org/linuxgraphics/gfx-docs/drm/gpu/amdgpu.html
#   https://docs.kernel.org/gpu/amdgpu/thermal.html

{% if 'default' in item.0.name %}
# set power state transition heuristics to default
echo '{{ item.0.value }}' | tee /sys/class/drm/{{ card }}/device/pp_power_profile_mode

# set control mode back to auto
# attempts to dynamically set optimal power profile for conditions
echo 'auto' | tee /sys/class/drm/{{ card }}/device/power_dpm_force_performance_level

# reset any existing profile clock changes
echo 'r' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage

# give default profile {{ power_max_default_multi * 100.0 |int }}% of the max power capability
# {{ power_cap_default|int/1000000 }} Watts of {{ power_max|int/1000000 }} total
echo '{{ power_cap_default }}' | tee {{ powercap_set.files.0.path }}
{% elif 'custom' in item.0.name %}
# set manual control mode
# allow control via 'pp_dpm_mclk', 'pp_dpm_sclk', 'pp_dpm_pcie', and 'pp_power_profile_mode' files
echo 'manual' | tee /sys/class/drm/{{ card }}/device/power_dpm_force_performance_level

# set power state transition heuristics to custom/manual
# looked up from amdgpu_profiles variable using 'with_nested' loop in task
echo '{{ item.0.value }}' | tee /sys/class/drm/{{ card }}/device/pp_power_profile_mode

# give this profile {{ power_max_custom_multi * 100.0 |int }}% of the max power capability
# {{ power_cap_custom|int/1000000 }} Watts of {{ power_max|int/1000000 }} total
echo '{{ power_cap_custom }}' | tee {{ powercap_set.files.0.path }}

# set the minimum GPU clock
echo 's 0 {{ gpu_clock_min }}' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage

# set the maximum GPU clock
echo 's 1 {{ gpu_clock_max }}' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage

# set the maximum GPU *memory* clock
echo 'm 1 {{ gpumem_clock_max }}' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
{% if gpu_mv_offset is defined %}

# offset GPU voltage {{ gpu_mv_offset }}mV
echo 'vo {{ gpu_mv_offset }}' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
{% endif %}

# commit the changes
echo 'c' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage

# force GPU memory into highest profile
echo '3' | tee /sys/class/drm/{{ card }}/device/pp_dpm_mclk
{% endif %}