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drm/i915: streamline hsw_pm_irq_handler

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The if (pm_iir & ~GEN6_PM_RPS_EVENTS) check was redunandant. Otoh
adding a check for rps events allows us to avoid the spinlock grabbing
for VECS interrupts.

v2: Drop misplaced hunk which now moved to the right patch.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2013-07-04 23:35:26 +02:00
parent d0ecd7e221
commit 41a05a3a5c
1 changed files with 9 additions and 11 deletions
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20
drivers/gpu/drm/i915/i915_irq.c
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@ -963,25 +963,23 @@ static void dp_aux_irq_handler(struct drm_device *dev)
static void hsw_pm_irq_handler(struct drm_i915_private *dev_priv,
u32 pm_iir)
{
spin_lock(&dev_priv->rps.lock);
dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
if (dev_priv->rps.pm_iir) {
if (pm_iir & GEN6_PM_RPS_EVENTS) {
spin_lock(&dev_priv->rps.lock);
dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
/* never want to mask useful interrupts. (also posting read) */
WARN_ON(I915_READ_NOTRACE(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS);
/* TODO: if queue_work is slow, move it out of the spinlock */
queue_work(dev_priv->wq, &dev_priv->rps.work);
spin_unlock(&dev_priv->rps.lock);
}
spin_unlock(&dev_priv->rps.lock);
if (pm_iir & ~GEN6_PM_RPS_EVENTS) {
if (pm_iir & PM_VEBOX_USER_INTERRUPT)
notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
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);
}
}