[Intel-gfx] [PATCH] drm/i915: Revert "drm/i915: Enable PSR2 by default"

[Chris Wilson]

Quoting Rodrigo Vivi (2019-07-11 12:02:01)
> On Thu, Jul 11, 2019 at 10:22:54AM +0100, Chris Wilson wrote:
> > Multiple users are reporting black screens upon boot, after resume, or
> > frozen after a short period of idleness. A black screen on boot is a
> > critical issue so disable psr2 again until resolved.
> > 
> > This reverts commit 8f6e87d6d561f10cfa48a687345512419839b6d8.
> > 
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111088
> 
> I agree it is critical, but unfortunately this revert won't solve the issue.
> 
> [    1.954886] [drm:intel_psr_init_dpcd [i915]] eDP panel supports PSR version 1
> [    2.003686] [drm:intel_psr_enable_locked [i915]] Enabling PSR1
> 
> Users are claiming the regression is only on 5.2 with 5.1 working well
> and PSR1 is enabled by default since 5.0.

Hmm, which panels are psr2 and is it being accurately reported?

If you suspect psr1, just revert both for now.
-Chris