[Bug 106188] Can't successfully set pstates in pp_od_clk_voltage - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 106188] Can't successfully set pstates in pp_od_clk_voltage
Date: Mon, 23 Apr 2018 12:49:36 +0000	[thread overview]
Message-ID: <bug-106188-502@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=106188

            Bug ID: 106188
           Summary: Can't successfully set pstates in pp_od_clk_voltage
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: tempel.julian@gmail.com

Hello,
I specified "amdgpu.ppfeaturemask=0xffffffff" as a boot parameter so I could
access "/sys/class/drm/card0/device/pp_od_clk_voltage".
The pstate table for source and memory clocks looks correct.

When I run "echo "s 7 1209 900" /sys/class/drm/card0/device/pp_od_clk_voltage",
it returns "s 7 1209 900 /sys/class/drm/card0/device/pp_od_clk_voltage".
When I run "echo "c" /sys/class/drm/card0/device/pp_od_clk_voltage" afterwards,
it returns "c /sys/class/drm/card0/device/pp_od_clk_voltage".

However, the change is not applied. When I do "cat
/sys/class/drm/card0/device/pp_od_clk_voltage", it still says "7:       1196Mhz
      1006 mV".
And when I run "watch -n 0.5  cat /sys/kernel/debug/dri/0/amdgpu_pm_info", it
reports
"       1196 MHz (SCLK)
        981 mV (VDDGFX)
".

Am I making a mistake somewhere or should it work like this?

I also tried "echo "manual" >
/sys/class/drm/card0/device/power_dpm_force_performance_level" and setting
pstates 5-7, but that didn't help either.
In the documentation, I read that pp_od_clk_voltage should also include
OD_range, but it's not there for me.

Linux drm-next-4.18-wip 4.16.1.52132fd03
MSI RX 560 Aero ITX

Thanks!

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