Ubuntu
linux package

  1. Bug #1488719
  2. Comment #67

Comment 67 for bug 1488719

Revision history for this message
In , Ville-syrjala-e (ville-syrjala-e) wrote :

Random idea:

--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2345,6 +2345,7 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg)
                u32 pch_iir = I915_READ(SDEIIR);
                if (pch_iir) {
                        I915_WRITE(SDEIIR, pch_iir);
+ POSTING_READ(SDEIIR);
                        ret = IRQ_HANDLED;