Bug 111584 - "pp_od_clk_voltage" unavailable on Hawaii GPU (R9 390)
Summary: "pp_od_clk_voltage" unavailable on Hawaii GPU (R9 390)
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/AMDgpu (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: not set enhancement
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2019-09-07 15:43 UTC by Jonas del Campo
Modified: 2019-11-19 09:51 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Description Jonas del Campo 2019-09-07 15:43:15 UTC
I have recently tried to overclock/undervolt my GPU (R9 390) within Linux thanks to the "amdgpu.ppfeaturemask=0xffffffff" boot parameter, but unfortunately the file "pp_od_clk_voltage" is not available after a reboot.

Files "pp_dpm_mclk" and "pp_dpm_sclk" however show correct states and MHz, except that they don't show voltage information. Changing "power_dpm_force_performance_level" to manual allows me to make changes to these files, I can force a state to be used and overclock it, but voltages aren't showed and can't be modified.

I have read that Southern Island GPUs were not expected to get this feature working, and I know Vega is compatible, but I can't find anywhere if Hawaii (CIK) hardware should be able to expose this feature. I might be missing something.

Is there any way to undervolt my GPU under Linux at the moment?

OS: Arch Linux
Kernel: 5.2.11.arch1-1
Mesa: 19.1.6-1
Xorg: 1.20.5-2
Boot parameters: radeon.cik_support=0 amdgpu.cik_support=1 amdgpu.dpm=1 amdgpu.dc=1 amdgpu.ppfeaturemask=0xffffffff
GPU: [AMD/ATI] Hawaii PRO [Radeon R9 290/390] (rev 80)

Feel free to ask for more details and output if needed.

Thank you for your time.
Comment 1 Martin Peres 2019-11-19 09:51:04 UTC
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