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From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 205393] New: [amdgpu powerplay] vega10: custom pp_table, AVFS accidentally reenabled after display powersave
Date: Sat, 02 Nov 2019 21:26:42 +0000	[thread overview]
Message-ID: <bug-205393-2300@https.bugzilla.kernel.org/> (raw)

https://bugzilla.kernel.org/show_bug.cgi?id=205393

            Bug ID: 205393
           Summary: [amdgpu powerplay] vega10: custom pp_table, AVFS
                    accidentally reenabled after display powersave
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.4-rc5
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: haro41@gmx.de
        Regression: No

Created attachment 285755
  --> https://bugzilla.kernel.org/attachment.cgi?id=285755&action=edit
patch to prevent AVFS reenabling (against 5.4-rc5)

When uploading a customized powerplay table, AVFS feature becomes correctly
disabled.

But after a power save (blanc screen) event, AVFS becomes accidentally enabled
again. This results in unwanted gfx voltage changes.

Example:

vddc = 1.075V after pp table upload (correct).

vddc = 1.150V after power save event (set by smc because AVFS feature
reenabled).

I have debugged this issue and found a simple solution. There is a patch
attached, that solves the problem.

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             reply	other threads:[~2019-11-02 21:26 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-02 21:26 bugzilla-daemon [this message]
2019-11-04 13:58 ` [Bug 205393] [amdgpu powerplay] vega10: custom pp_table, AVFS accidentally reenabled after display powersave bugzilla-daemon
2019-11-04 14:02 ` bugzilla-daemon
2019-11-07 17:17 ` bugzilla-daemon
2019-11-07 18:18 ` bugzilla-daemon
2019-11-07 20:17 ` bugzilla-daemon
2019-11-07 20:39 ` bugzilla-daemon
2019-11-07 23:57 ` bugzilla-daemon
2019-11-08  0:00 ` bugzilla-daemon
2019-11-08 10:35 ` bugzilla-daemon
2019-11-08 10:49 ` bugzilla-daemon
2019-11-08 16:18 ` bugzilla-daemon
2019-11-08 17:16 ` bugzilla-daemon
2019-11-08 17:22 ` bugzilla-daemon
2019-11-08 17:25 ` bugzilla-daemon
2019-11-09  9:48 ` bugzilla-daemon

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