Regressions in amd-staging-4.12 and amd-staging-drm-next

[Deucher, Alexander]

> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Martin Babutzka
> Sent: Friday, September 29, 2017 2:00 PM
> To: amd-gfx at lists.freedesktop.org
> Subject: Regressions in amd-staging-4.12 and amd-staging-drm-next
> 
> Hello,
> 
> At first congrats for submitting the pull request. I hope the dc code
> is accepted and included in the 4.15 kernel.
> 
> Me and some other users of my kernel builds (https://github.com/M-Bab/l
> inux-kernel-amdgpu-binaries) found further regressions in builds based
> on amd-staging-4.12 and amd-staging-drm-next. I can confirm these
> regressions affecting my PC with R9 380 GPU, running on Xubuntu 17.04
> with mesa 17.2 stable:
> 
> amd-staging-4.12: When the GPU needs to wake up there is a significant
> chance that the display freezes (black screen, login screen or crazy
> pattern). Can't tell if the whole system is frozen as well. This can
> happen either after wake-up from standby or after resuming from
> lockscreen (where the GPU seams to be shut off as well).
> 
> amd-staging-drm-next: Considering it is the latest codebase the
> performance is a bit underwhelming: It starts with trace messages in
> dmesg during boot (attached). Later on running anything graphical
> results in full-screen flicker and flickering black lines.
> 
> Are these issues known already? I can try to git bisect any of them if
> you are interested.
> How should dc-kernel users proceed? Is the amd-staging-drm-next the
> recommended branch until the dc-code is merged?

drm-next-4.15-dc has the latest dc code for upstream.  It has some additional fixes for dc against the latest core drm changes in drm-next that are not in amd-staging-drm-next yet.

Alex