[PATCH 07/21] drm/i915/guc: Add status checks to enable/disable_guc_interrupts

[Sagar Arun Kamble]

GuC interrupts are currently enabled by Logging and disabled in different
scenarios. Make disabling check whether interrupts were already disabled
and similar for enable path. This will remove the state tracking for the
callers of these functions based on kernel parameters.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 05236b2..ee7d198 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -459,18 +459,22 @@ void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv)
 
 void gen9_enable_guc_interrupts(struct drm_i915_private *dev_priv)
 {
+	if (READ_ONCE(dev_priv->guc.interrupts_enabled))
+		return;
+
 	spin_lock_irq(&dev_priv->irq_lock);
-	if (!dev_priv->guc.interrupts_enabled) {
-		WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) &
-				       dev_priv->pm_guc_events);
-		dev_priv->guc.interrupts_enabled = true;
-		gen6_enable_pm_irq(dev_priv, dev_priv->pm_guc_events);
-	}
+	WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) &
+			       dev_priv->pm_guc_events);
+	dev_priv->guc.interrupts_enabled = true;
+	gen6_enable_pm_irq(dev_priv, dev_priv->pm_guc_events);
 	spin_unlock_irq(&dev_priv->irq_lock);
 }
 
 void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv)
 {
+	if (!READ_ONCE(dev_priv->guc.interrupts_enabled))
+		return;
+
 	spin_lock_irq(&dev_priv->irq_lock);
 	dev_priv->guc.interrupts_enabled = false;
 
-- 
1.9.1