I have done some searching around and each of the OD_RANGE parameters,
as they appear in PP_OD_CLK_VOLTAGE seem to be defined in lines 4495 to
4506 of linux/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c as
follows:
linux/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
As copied from file:
""
case OD_RANGE:
if (hwmgr->od_enabled) {
size = sprintf(buf, "%s:\n", "OD_RANGE");
size += sprintf(buf + size, "SCLK: %7uMHz %10uMHz\n",
data->golden_dpm_table.sclk_table.dpm_levels[0].value/100,
hwmgr->platform_descriptor.overdriveLimit.engineClock/100);
size += sprintf(buf + size, "MCLK: %7uMHz %10uMHz\n",
data->golden_dpm_table.mclk_table.dpm_levels[0].value/100,
hwmgr->platform_descriptor.overdriveLimit.memoryClock/100);
size += sprintf(buf + size, "VDDC: %7umV %11umV\n",
data->odn_dpm_table.min_vddc,
data->odn_dpm_table.max_vddc);
""
Hope this helps
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu.
https://bugs.launchpad.net/bugs/1861633
Title:
Rx vega m gl undervolt and overclock pp_od_clk_voltage values cannot
be changed using echo
Status in Linux:
New
Status in linux package in Ubuntu:
New
Status in xserver-xorg-video-amdgpu package in Ubuntu:
New
Bug description:
GPU=Rx vega m gl
Release=Focal, 20.04 (development)
xserver-xorg-video-amdgpu version=19.1.0-1 (active development)
/sys/class/drm/card1/device/pp_od_clk_voltage cannot be change beyond
the parameters stated at the bottom of this file within the title
OD_RANGE, as follows:
OD_RANGE:
SCLK: 225MHz 1011MHz
MCLK: 300MHz 700MHz
VDDC: 750mV 750mV
The parameters in OD_RANGE are too constrictive and do not allow
practicable overclocking/undervolting. Please could these values be
changed to the following?:
OD_RANGE:
SCLK: 225MHz 1500MHz
MCLK: 300MHz 850MHz
VDDC: 300mV 1500mV
This bug was also found here;
https://gitlab.freedesktop.org/drm/amd/issues/574
The voltages and clock speeds cannot be amended above 1011Mhz, the
HBM2 cannot exceed 700MHz and all voltages can only equal 750mV.
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