If it wasn't never enabled by kernel parameter or platform default
we can avoid reading registers so many times in vain
Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a988862..afcc284 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -339,6 +339,12 @@ bool intel_fbc_enabled(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ /* If it wasn't never enabled by kernel parameter or platform default
+ * we can avoid reading registers so many times in vain
+ */
+ if (!i915.enable_fbc)
+ return false;
+
if (!dev_priv->display.fbc_enabled)
return false;
--
1.9.3
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