blob: 5ea60eaae1227161ad43ed602dae75ae57297965 [file] [log] [blame]
From b7db2611a077dc0f1b04fe1d4c3f30bb0280286d Mon Sep 17 00:00:00 2001
From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Thu, 15 Aug 2013 11:51:32 -0300
Subject: drm/i915: merge HSW and SNB PM irq handlers
Because hsw_pm_irq_handler does exactly what gen6_rps_irq_handler does
and also processes the 2 additional VEBOX bits. So merge those
functions and wrap the VEBOX bits on a HAS_VEBOX check. This
check isn't really necessary since the bits are reserved on
SNB/IVB/VLV, but it's a good documentation on who uses them.
v2: - Change IS_HASWELL check to HAS_VEBOX
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 1403c0d4d46f2eed2ab13b89561c853988ad7513)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 50 ++++++++++-------------------------------
1 file changed, 12 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index aaad8c639a3a..9e2ea5b16233 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -942,28 +942,6 @@ static void snb_gt_irq_handler(struct drm_device *dev,
ivybridge_parity_error_irq_handler(dev);
}
-/* Legacy way of handling PM interrupts */
-static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv,
- u32 pm_iir)
-{
- /*
- * IIR bits should never already be set because IMR should
- * prevent an interrupt from being shown in IIR. The warning
- * displays a case where we've unsafely cleared
- * dev_priv->rps.pm_iir. Although missing an interrupt of the same
- * type is not a problem, it displays a problem in the logic.
- *
- * The mask bit in IMR is cleared by dev_priv->rps.work.
- */
-
- spin_lock(&dev_priv->irq_lock);
- dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
- snb_disable_pm_irq(dev_priv, pm_iir & GEN6_PM_RPS_EVENTS);
- spin_unlock(&dev_priv->irq_lock);
-
- queue_work(dev_priv->wq, &dev_priv->rps.work);
-}
-
#define HPD_STORM_DETECT_PERIOD 1000
#define HPD_STORM_THRESHOLD 5
@@ -1030,13 +1008,10 @@ static void dp_aux_irq_handler(struct drm_device *dev)
wake_up_all(&dev_priv->gmbus_wait_queue);
}
-/* Unlike gen6_rps_irq_handler() from which this function is originally derived,
- * we must be able to deal with other PM interrupts. This is complicated because
- * of the way in which we use the masks to defer the RPS work (which for
- * posterity is necessary because of forcewake).
- */
-static void hsw_pm_irq_handler(struct drm_i915_private *dev_priv,
- u32 pm_iir)
+/* The RPS events need forcewake, so we add them to a work queue and mask their
+ * IMR bits until the work is done. Other interrupts can be processed without
+ * the work queue. */
+static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
{
if (pm_iir & GEN6_PM_RPS_EVENTS) {
spin_lock(&dev_priv->irq_lock);
@@ -1047,12 +1022,14 @@ static void hsw_pm_irq_handler(struct drm_i915_private *dev_priv,
queue_work(dev_priv->wq, &dev_priv->rps.work);
}
- if (pm_iir & PM_VEBOX_USER_INTERRUPT)
- notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
+ if (HAS_VEBOX(dev_priv->dev)) {
+ if (pm_iir & PM_VEBOX_USER_INTERRUPT)
+ notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
- if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
- DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
- i915_handle_error(dev_priv->dev, false);
+ if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
+ DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
+ i915_handle_error(dev_priv->dev, false);
+ }
}
}
@@ -1427,10 +1404,7 @@ static irqreturn_t ironlake_irq_handler(int irq, void *arg)
if (INTEL_INFO(dev)->gen >= 6) {
u32 pm_iir = I915_READ(GEN6_PMIIR);
if (pm_iir) {
- if (IS_HASWELL(dev))
- hsw_pm_irq_handler(dev_priv, pm_iir);
- else
- gen6_rps_irq_handler(dev_priv, pm_iir);
+ gen6_rps_irq_handler(dev_priv, pm_iir);
I915_WRITE(GEN6_PMIIR, pm_iir);
ret = IRQ_HANDLED;
}
--
1.8.5.rc3