[Bug 219556] New: AMDGPU monitoring is broken

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219556

            Bug ID: 219556
           Summary: AMDGPU monitoring is broken
           Product: Drivers
           Version: 2.5
    Kernel Version: 6.13-rc1
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: i.r.e.c.c.a.k.u.n+bugzilla.kernel.org@gmail.com
        Regression: Yes
           Bisected 831c1926ee728c3e747255f7c0f434762e8e863d
         commit-id:

In 6.13-rc1, AMDGPU monitoring is broken. Many sysfs knobs simply output
nothing. For example:

# cd /sys/class/drm/card1/device
# <gpu_busy_percent
# <pp_dpm_sclk
# <pp_od_clk_voltage
# <hwmon/hwmon6/temp1_input

Otherwise the kernel log seems to be totally fine and GPU itself appears to
work normally.

I tried AMD GPUs of different generations, so it doesn't appear to be
series/model specific.

I have done a bisection though.

first bad commit: [831c1926ee728c3e747255f7c0f434762e8e863d] Merge tag
'uml-for-linus-6.13-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

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