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--- devices:amd_graphics [2018/12/14 22:19] – Sean Rhone
+++ devices:amd_graphics [2019/08/23 04:35] – [Set] Sean Rhone
@@ Line 1: / Line 1: @@
+====== Information ======
+  * Diagnostic commands for AMD graphics cards
+====== AMDGPU ======
+===== References =====
+  * https://wiki.archlinux.org/index.php/AMDGPU#Overclocking
+===== Query =====
+==== Power Info ====
+****
+  sudo watch --interval '0.5' cat '/sys/kernel/debug/dri/0/amdgpu_pm_info'
+==== Power Sates ====
+****
+  cat '/sys/class/drm/card0/device/pp_od_clk_voltage'
+===== Overclock =====
+==== SCLK ====
+  * ''7'' is the highest available ''PSTATE'' for ''SCLK''
+  * ''1386'' is the value for ''SCLK'' for that ''PSTATE''
+  * ''1155'' is the voltage/''VDDC'' for the specified ''SCLK'' for that ''PSTATE''
+  * When the highest ''PSTATE'' is used, the GPU Core will run at 1386MHz @ 1155mV
+  * :!: This does **not** take effect immediately
+  echo 's 7 1386 1155' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'
+==== MCLK ====
+  * ''2'' is the highest available ''PSTATE'' for ''MCLK''
+  * ''2025'' is the value for ''MCLK'' for that ''PSTATE''
+  * ''955'' is the voltage/''VDDC'' for the specified ''MCLK'' for that ''PSTATE''
+  * When the highest ''PSTATE'' is used, the GPU Memory will run at 2025MHz @ 955mV
+  * :!: This does **not** take effect immediately
+  echo 'm 2 2025 955' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'
+==== Verify Values ====
+  * :!: Check if the specified values look alright
+  cat '/sys/class/drm/card0/device/pp_od_clk_voltage'
+==== Commit ====
+  * :!: Be absolutely certain the values above looked alright
+  * :!: It is **very** well possible to destroy hardware with this if the values are too high
+  echo 'c' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'
+==== Verify Clocks ====
+  * Runs ''glxgears'' without VSync, thus allowing the GPU to enter the highest ''PSTATE'' automatically
+  * Queries power info live every 0.5s
+  vblank_mode='0' glxgears
+  sudo watch --interval '0.5' cat '/sys/kernel/debug/dri/0/amdgpu_pm_info'
+==== Reset Clocks ====
+  * Sets all CLKs and VDDCs to card defaults and commits it
+  echo 'r' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage' && echo 'c' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'
+===== PSTATE Control =====
+==== Manual Controls ====
+  * ''PSTATE'' will be manually controllable
+  * TODO: ''auto'' makes sense as the default for this?
+  echo 'manual' | sudo tee '/sys/class/drm/card0/device/power_dpm_force_performance_level'
+  cat '/sys/class/drm/card0/device/power_dpm_force_performance_level'
+==== SCLK ===
+  * Can allow either a single ''PSTATE'', or multiple to be automatically selected for ''SCLK'' based on GPU load
+  echo '7' | sudo tee '/sys/class/drm/card0/device/pp_dpm_sclk'
+  echo '5 6 7' | sudo tee '/sys/class/drm/card0/device/pp_dpm_sclk'
+==== MCLK ====
+  * Can allow either a single ''PSTATE'', or multiple to be automatically selected for ''MCLK'' based on GPU load
+  echo '2' | sudo tee '/sys/class/drm/card0/device/pp_dpm_mclk'
+  echo '1 2' | sudo tee '/sys/class/drm/card0/device/pp_dpm_mclk'
+===== Power Limit =====
+==== Query ====
+****
+  cat '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap'
+==== Get Max ====
+****
+  cat '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap_max'
+==== Set ====
+  * :!: This makes fun assumptions, but theoretically shouldn't allow the power cap to go above levels stated in the firmware; might not be dangerous
+  echo "$(cat '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap_max')" | sudo tee '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap' > '/dev/null'
+  echo "$(cat '/sys/class/drm/card1/device/hwmon/hwmon'*'/power1_cap_max')" | sudo tee '/sys/class/drm/card1/device/hwmon/hwmon'*'/power1_cap' > '/dev/null'