On Mon, Dec 8, 2025 at 4:12 PM Alexandre Demers <[email protected]> wrote: > > I should have asked previously: were SI gpus based on SMU6 or are they > using SMU7?
Forget this question, I found the answer in the DPM IP block. > > On Mon, Dec 8, 2025 at 9:32 AM Alex Deucher <[email protected]> wrote: > > > > On Sat, Dec 6, 2025 at 11:30 AM Alexandre Demers > > <[email protected]> wrote: > > > > > > OK, I was hoping for a similar SMU7 implementation never completed. > > > > > > I see both VDDC and VDDCI (for Evergreen+) values available. When > > > looking at amdgpu_pm_info, VDDC would be reported as VDDGFX I suppose > > > (and inX_label under /sys/class/drm/cardX/device/hwmon/hwmonY/), isn't > > > it? > > > > Yes. > > > > > > > > What would VDDCI correspond to? I mean, how should it be displayed > > > (maybe it has its specific inX_label)? > > > > I don't recall off hand what voltage domain VDDCI was off hand. I > > think it may have been the memory interface. I'll see if I can dig it > > up. > > > > Alex > > Thanks > Alexandre > > > > > > > > Cheers, > > > Alexandre > > > > > > On Mon, Dec 1, 2025 at 10:26 AM Alex Deucher <[email protected]> > > > wrote: > > > > > > > > On Sat, Nov 29, 2025 at 8:44 PM Alexandre Demers > > > > <[email protected]> wrote: > > > > > > > > > > Hi, > > > > > > > > > > I was wondering if SI GPUs support reporting power and voltage values > > > > > at the hardware level? I read somewhere that it was supported from > > > > > GCN1.2 (Tonga and over), but I haven't found anything on prior > > > > > generations. Going through the register names, I wasn't able to > > > > > identify any who may correspond to power or voltage level. > > > > > > > > > > So I'm asking, just in case it is supported and I missed the > > > > > information while searching for it. > > > > > > > > Correct. There is no interface to query the power. For voltages you > > > > can look at mmTARGET_AND_CURRENT_PROFILE_INDEX to find out the current > > > > DPM level and then convert that into struct si_ps to look up the > > > > voltages, similar to what is done for sclk and mclk. See > > > > si_dpm_read_sensor(). > > > > > > > > Alex
