[Bug 95281] [ILK, BDW] Display stop working after resumed from S4 due to LP0 WM fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95281

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      i915 features|                            |watermark
      i915 platform|                            |ILK
            Summary|[BDW] Display stop working  |[ILK,BDW] Display stop
                   |after resumed from S4       |working after resumed from
                   |                            |S4 due to LP0 WM fail
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Ville Syrjala <ville.syrjala at linux.intel.com> ---

[   63.184167] [drm:ilk_validate_wm_level] Sprite WM0 too large 120 (max 0)
[   63.184168] [drm:ilk_validate_pipe_wm] LP0 watermark invalid
[   63.184168] [drm:intel_crtc_atomic_check] No valid intermediate pipe
watermarks are possible

I saw this on my ILK recently. Regression from some watermark work.

--- Comment #4 from Ville Syrjala <ville.syrjala at linux.intel.com> ---

[   63.184167] [drm:ilk_validate_wm_level] Sprite WM0 too large 120 (max 0)
[   63.184168] [drm:ilk_validate_pipe_wm] LP0 watermark invalid
[   63.184168] [drm:intel_crtc_atomic_check] No valid intermediate pipe
watermarks are possible

I saw this on my ILK recently. Regression from some watermark work.

--- Comment #5 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Shoukd be fixed by 
commit e3d5457c7caa ("drm/i915: Ignore stale wm register values on resume on
ilk-bdw (v2)")

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