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-...@kernel-bugs.osdl.org
Reporter: har...@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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