[PATCH 6.1/9] drm/i915: don't queue PM events we won't process

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

On SNB/IVB/VLV we only call gen6_rps_irq_handler if one of the IIR
bits set is part of GEN6_PM_RPS_EVENTS, but at gen6_rps_irq_handler we
add all the enabled IIR bits to the work queue, not only the ones that
are part of GEN6_PM_RPS_EVENTS. But then gen6_pm_rps_work only
processes GEN6_PM_RPS_EVENTS, so it's useless to add anything that's
not GEN6_PM_RPS_EVENTS to the work queue.

As a bonus, gen6_rps_irq_handler looks more similar to
hsw_pm_irq_handler, so we may be able to merge them in the future.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 0f46d33..5b51c43 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -959,7 +959,7 @@ static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv,
 	 */
 
 	spin_lock(&dev_priv->irq_lock);
-	dev_priv->rps.pm_iir |= pm_iir;
+	dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
 	snb_set_pm_irq(dev_priv, dev_priv->rps.pm_iir);
 	spin_unlock(&dev_priv->irq_lock);
 
@@ -1128,7 +1128,7 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
 		if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
 			gmbus_irq_handler(dev);
 
-		if (pm_iir & GEN6_PM_RPS_EVENTS)
+		if (pm_iir)
 			gen6_rps_irq_handler(dev_priv, pm_iir);
 
 		I915_WRITE(GTIIR, gt_iir);
@@ -1433,7 +1433,7 @@ static irqreturn_t ironlake_irq_handler(int irq, void *arg)
 		if (pm_iir) {
 			if (IS_HASWELL(dev))
 				hsw_pm_irq_handler(dev_priv, pm_iir);
-			else if (pm_iir & GEN6_PM_RPS_EVENTS)
+			else
 				gen6_rps_irq_handler(dev_priv, pm_iir);
 			I915_WRITE(GEN6_PMIIR, pm_iir);
 			ret = IRQ_HANDLED;
-- 
1.8.1.2