drm/i915: Start WM computation from scratch on ILK-BDW
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Thu, 14 Jan 2016 12:53:34 +0000 (14:53 +0200)
committerMatt Roper <matthew.d.roper@intel.com>
Fri, 15 Jan 2016 02:33:25 +0000 (18:33 -0800)
commitf1ecaf8f9c9924badd4c8f690e39632d31edb500
tree386a94552b10ba3229c3b49451a9f0cd8db257a7
parent87ad321287ae99a8932af1a19ac99849284a62bd
drm/i915: Start WM computation from scratch on ILK-BDW

ilk_compute_pipe_wm() assumes as zeroed pipe_wm structure when it
starts. We used to pass such a zeroed struct in, but this got broken
when the pipe_wm structure got embedded in the crtc state.

To fix it without too much fuzz, we need to resort to a memset().

Fixes: 4e0963c7663b ("drm/i915: Calculate pipe watermarks into CRTC state (v3)")
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
drivers/gpu/drm/i915/intel_pm.c