[Bug 67526] [HSW ULT/desktop bisected] I-G-T testdisplay -a causes screen black

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67526

--- Comment #6 from Rodrigo Vivi <rodrigo.vivi at gmail.com> ---
Created attachment 83550
  --> https://bugs.freedesktop.org/attachment.cgi?id=83550&action=edit
drm/i915: remove intel_dp NULL deref on psr_update.

I couldn't find any crtc null deref and to be honest have no idea what can be
happening here.

But this null deref at intel_dp shouldn't be here, so this is my best guess for
now.

Please test and let me know if this fix the issue.

btw: I'm going to work on a psr rework to let it tied to pipe_config now.

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