[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

            Bug ID: 108613
           Summary: amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU
                    upscaling resolution resets pp_dpm_mclk
           Product: DRI
           Version: DRI git
          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

My display doesn't offer upscaling resolutions. However, amdgpu.dc=1 +
xf86-video-amdgpu does.
When I change the resolution from native (2560x1440) to one of those
automatically offered upscaling resolutions (e.g. 1920x1080), the value in
"/sys/class/drm/card0/device/pp_dpm_mclk" gets set to default.

I changed it before like this (to prevent flickering with 75Hz with my
display):

echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level
echo "2" >  /sys/class/drm/card0/device/pp_dpm_mclk

The VRAM runs with its maximum clock as long as I don't change resolution. When
I change the resolution like described above, the VRAM clock again gets
dynamically changed according to load, which introduces nasty flickering in my
case.

The desired behavior would be that the change done to pp_dpm_mclk remains
untouched when changing to a GPU upscaling resolution.

I haven't checked if pp_dpm_sclk is affected as well. Other
powerplay/overdrive/fan settings remain untouched by resolution change.

Using latest linux-amd-staging-drm-next-wip-git kernel.
Xorg session

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Please attach the corresponding Xorg log file and output of dmesg.

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

--- Comment #2 from tempel.julian@gmail.com ---
Created attachment 142327
  --> https://bugs.freedesktop.org/attachment.cgi?id=142327&action=edit
dmesg.log

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

--- Comment #3 from tempel.julian@gmail.com ---
Created attachment 142328
  --> https://bugs.freedesktop.org/attachment.cgi?id=142328&action=edit
xorg.log

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #142327|text/x-log                  |text/plain
          mime type|                            |

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #142328|text/x-log                  |text/plain
          mime type|                            |

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

--- Comment #4 from dwagner <jb5sgc1n.nya@20mm.eu> ---
This is most certainly a duplicate of bug
https://bugs.freedesktop.org/show_bug.cgi?id=107141 (which I would really
really like to be fixed one day...)

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

--- Comment #5 from tempel.julian@gmail.com ---
Yeah, looks like that. It also happens when changing ttys.

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|NEW                         |RESOLVED

--- Comment #6 from Michel Dänzer <michel@daenzer.net> ---


*** This bug has been marked as a duplicate of bug 107141 ***

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[Bug 108613] amdgpu.dc=1 + xf86-video-amdgpu: changing to a GPU upscaling resolution resets pp_dpm_mclk

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https://bugs.freedesktop.org/show_bug.cgi?id=108613

--- Comment #7 from bmilreu@gmail.com ---
I gave up trying to use my monitor at it's supported 75hz. Locking mclk to fix
flickering works only temporarily because it resets at certain events
(sleep/wake, resolution changes). Why is this resolved?

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