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drm/i915/skl: Fail the flip if no FB for WM calculation

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Fail the flip if no FB is present but plane_state is set as visible.
Above is not a valid combination so instead of continue fail the flip.

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170517115831.13830-6-mahesh1.kumar@intel.com
This commit is contained in:
Kumar, Mahesh 2017-05-17 17:28:24 +05:30 committed by Matt Roper
parent 7084b50bdd
commit 7b75119c8b
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_pm.c
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@ -4408,7 +4408,8 @@ skl_compute_wm_level(const struct drm_i915_private *dev_priv,
if (!intel_pstate)
intel_pstate = to_intel_plane_state(plane->state);
WARN_ON(!intel_pstate->base.fb);
if (WARN_ON(!intel_pstate->base.fb))
return -EINVAL;
ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][intel_plane->id]);