[PATCH] Upstream fix for Raven Ridge

[Luya Tshimbalanga]

Hello team,

Upstream provided several bug fix related to AMD APU Raven Ridge which 
hangs when using some applications like radeontop to read its interface 
[1]. Test model was 2018 HP Envy x360 Ryzen 2500U (device id 15dd):

drm/amdgpu: disable gfxoff when using register read interface
------------------------------------------------------------------------------------------

https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-fixes-5.4&id=...

Original Raven Ridge (15d8) becomes unstable when using gfxoff. The test 
model  Ryzen 2500U with id 15dd and above is unaffected

drm/amdgpu: disable gfxoff on original raven
-----------------------------------------------------------------

https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-fixes-5.4&id=...


Revert "drm/amd/display: enable S/G for RAVEN chip"

----------------------------------------------------------------------------

https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-fixes-5.4&id=...


It will be nice to backport for the current kernel 5.3. Thanks in advance.


Reference:

---------------

[1]https://bugzilla.kernel.org/show_bug.cgi?id=205497

-- 
Luya Tshimbalanga
Fedora Design Team
Fedora Design Suite maintainer

[Laura Abbott]

On 11/24/19 12:38 AM, Luya Tshimbalanga wrote:
>  Hello team,
>  
>  Upstream provided several bug fix related to AMD APU Raven Ridge which hangs when using
> some applications like radeontop to read its interface [1]. Test model was 2018 HP Envy
> x360 Ryzen 2500U (device id 15dd):
>  
>  drm/amdgpu: disable gfxoff when using register read interface
>
> ------------------------------------------------------------------------------------------
>  
>
> https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-fixes-5.4&id=...
>  
>  Original Raven Ridge (15d8) becomes unstable when using gfxoff. The test model  Ryzen
> 2500U with id 15dd and above is unaffected
>  
>  drm/amdgpu: disable gfxoff on original raven
>  -----------------------------------------------------------------
>  
>
> https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-fixes-5.4&id=...
>  
>  
>  Revert "drm/amd/display: enable S/G for RAVEN chip"
>  
>  ----------------------------------------------------------------------------
>  
>
> https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-fixes-5.4&id=...
>  
>  
>  It will be nice to backport for the current kernel 5.3. Thanks in advance.
>   
Do the fixes apply cleanly to 5.3? I saw they are tagged for stable
so it may just be easier to wait until they show up there. Given the
time frame, it may end up about the same as waiting for 5.4 anyway.

[Luya Tshimbalanga]

Yes, the fixes apply cleaning on 5.3 except the revert change. Here is an extract:

Applying: drm/amdgpu: disable gfxoff on original raven
Applying: drm/amdgpu: disable gfxoff when using register read interface
Applying: Revert "drm/amd/display: enable S/G for RAVEN chip"
error: patch failed: drivers/gpu/drm/amd/amdgpu/amdgpu_display.c:511
error: drivers/gpu/drm/amd/amdgpu/amdgpu_display.c: patch does not apply
error: patch failed: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c:688
error: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c: patch does not apply
Patch failed at 0094 Revert "drm/amd/display: enable S/G for RAVEN chip"

[Luya Tshimbalanga]

I tested kernel-5.4.0-2.fc32 for rawhide with the fix which works as intended and solved
the freezing issue related on AMD Raven Ridge running radeontop. The kernel regression
test passed as well.