[PATCH 5/8] drm/i915/skl: Fail the flip if no FB for WM calculation

Mahesh Kumar mahesh1.kumar at intel.com
Thu Feb 9 08:40:25 UTC 2017


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

Signed-off-by: Mahesh Kumar <mahesh1.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 35665b69541e..5361d42f19a4 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3740,7 +3740,8 @@ 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]);
 
-- 
2.11.0



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