From 9dfe2e3ad375a9ba32a13888873ec4586be01ff7 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 28 Sep 2017 13:06:24 +0300 Subject: [PATCH] drm/i915/gen8+: Init/reset display interrupts only if i915 IRQs are enabled Only init / reset the display interrupts during power well enabling / disabling if the i915 interrupts are enabled. So far we did the init / reset during driver loading / resuming too, where initialization / enabling of the i915 interrupts happens only at a later point. This didn't cause a problem due to GEN8_MASTER_IRQ_CONTROL being cleared, but triggered gen3_assert_iir_is_zero() in GEN8_IRQ_INIT_NDX(). References: https://bugs.freedesktop.org/show_bug.cgi?id=102988 Cc: Chris Wilson Signed-off-by: Imre Deak Reviewed-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20170928100624.15533-1-imre.deak@intel.com --- drivers/gpu/drm/i915/i915_irq.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index efd7827..e5997e8 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -3163,10 +3163,17 @@ void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv, enum pipe pipe; spin_lock_irq(&dev_priv->irq_lock); + + if (!intel_irqs_enabled(dev_priv)) { + spin_unlock_irq(&dev_priv->irq_lock); + return; + } + for_each_pipe_masked(dev_priv, pipe, pipe_mask) GEN8_IRQ_INIT_NDX(DE_PIPE, pipe, dev_priv->de_irq_mask[pipe], ~dev_priv->de_irq_mask[pipe] | extra_ier); + spin_unlock_irq(&dev_priv->irq_lock); } @@ -3176,8 +3183,15 @@ void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv, enum pipe pipe; spin_lock_irq(&dev_priv->irq_lock); + + if (!intel_irqs_enabled(dev_priv)) { + spin_unlock_irq(&dev_priv->irq_lock); + return; + } + for_each_pipe_masked(dev_priv, pipe, pipe_mask) GEN8_IRQ_RESET_NDX(DE_PIPE, pipe); + spin_unlock_irq(&dev_priv->irq_lock); /* make sure we're done processing display irqs */ -- 2.7.4