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drm/i915: don't disable/reenable IVB error interrupts when not needed

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If the error interrupts are already disabled, don't disable and
reenable them. This is going to be needed when we're in PC8+, where
all the interrupts are disabled so we won't risk re-enabling
DE_ERR_INT_IVB.

v2: Use dev_priv->irq_mask (Chris)

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2013-08-06 18:57:16 -03:00 committed by Daniel Vetter
parent 605cd25b1f
commit 333a820416
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/i915/i915_irq.c
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@ -1373,6 +1373,7 @@ static irqreturn_t ironlake_irq_handler(int irq, void *arg)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 de_iir, gt_iir, de_ier, sde_ier = 0;
irqreturn_t ret = IRQ_NONE;
bool err_int_reenable = false;
atomic_inc(&dev_priv->irq_received);
@ -1401,7 +1402,9 @@ static irqreturn_t ironlake_irq_handler(int irq, void *arg)
* handler. */
if (IS_HASWELL(dev)) {
spin_lock(&dev_priv->irq_lock);
ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
err_int_reenable = ~dev_priv->irq_mask & DE_ERR_INT_IVB;
if (err_int_reenable)
ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
spin_unlock(&dev_priv->irq_lock);
}
@ -1437,7 +1440,7 @@ static irqreturn_t ironlake_irq_handler(int irq, void *arg)
}
}
if (IS_HASWELL(dev)) {
if (err_int_reenable) {
spin_lock(&dev_priv->irq_lock);
if (ivb_can_enable_err_int(dev))
ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);