drm/i915: Drop useless VLV_IIR writes from vlv_display_irq_postinstall()

The extra VLV_IIR writes at the end of vlv_display_irq_postinstall()
serve no purpose. Remove them.

The VLV_IMR/IER/IIR setup at the start of the function also seems a bit
pointless since it doesn't unmask/enable anything. But leave it be for
now.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 297c9b1246da99b35144c7febc490bc0ae75fab6..f2a45f14ab446b22b197865ae5eb26d007df0074 100644 (file)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3444,9 +3444,6 @@ static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
        if (dev_priv->display_irqs_enabled)
                valleyview_display_irqs_install(dev_priv);
        spin_unlock_irq(&dev_priv->irq_lock);
-
-       I915_WRITE(VLV_IIR, 0xffffffff);
-       I915_WRITE(VLV_IIR, 0xffffffff);
 }
 
 static int valleyview_irq_postinstall(struct drm_device *dev)