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[intel] Create functions to enable/disable interrupts 

This shares common code sequences for managing the interrupt register bits
main
Keith Packard 2008-06-24 13:08:04 -07:00
parent ce2effbe2d
commit e36da6a133
1 changed files with 26 additions and 22 deletions
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48
shared-core/i915_irq.c
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@ -40,6 +40,26 @@
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT)
static inline void
i915_enable_irq(drm_i915_private_t *dev_priv, uint32_t mask)
{
if ((dev_priv->irq_mask_reg & mask) != 0) {
dev_priv->irq_mask_reg &= ~mask;
I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
(void) I915_READ(I915REG_INT_MASK_R);
}
}
static inline void
i915_disable_irq(drm_i915_private_t *dev_priv, uint32_t mask)
{
if ((dev_priv->irq_mask_reg & mask) != mask) {
dev_priv->irq_mask_reg |= mask;
I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
(void) I915_READ(I915REG_INT_MASK_R);
}
}
/**
* i915_get_pipe - return the the pipe associated with a given plane
* @dev: DRM device
@ -541,29 +561,17 @@ int i915_emit_irq(struct drm_device *dev)
void i915_user_irq_on(drm_i915_private_t *dev_priv)
{
DRM_SPINLOCK(&dev_priv->user_irq_lock);
if (dev_priv->irq_enabled && (++dev_priv->user_irq_refcount == 1)){
if ((dev_priv->irq_mask_reg & I915_USER_INTERRUPT) != 0) {
dev_priv->irq_mask_reg &= ~I915_USER_INTERRUPT;
I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
I915_WRITE(I915REG_INT_IDENTITY_R, I915_USER_INTERRUPT);
(void) I915_READ (I915REG_INT_MASK_R);
}
}
if (dev_priv->irq_enabled && (++dev_priv->user_irq_refcount == 1))
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
}
void i915_user_irq_off(drm_i915_private_t *dev_priv)
{
DRM_SPINLOCK(&dev_priv->user_irq_lock);
BUG_ON(dev_priv->irq_enabled && dev_priv->user_irq_refcount <= 0);
if (dev_priv->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
if ((dev_priv->irq_mask_reg & I915_USER_INTERRUPT) == 0) {
dev_priv->irq_mask_reg |= I915_USER_INTERRUPT;
I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
(void) I915_READ(I915REG_INT_MASK_R);
}
}
if (dev_priv->irq_enabled && (--dev_priv->user_irq_refcount == 0))
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
}
@ -688,9 +696,7 @@ int i915_enable_vblank(struct drm_device *dev, int plane)
I915_WRITE(pipestat_reg, pipestat);
}
DRM_SPINLOCK(&dev_priv->user_irq_lock);
dev_priv->irq_mask_reg &= ~mask_reg;
I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
I915_READ(I915REG_INT_MASK_R);
i915_enable_irq(dev_priv, mask_reg);
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
return 0;
@ -720,9 +726,7 @@ void i915_disable_vblank(struct drm_device *dev, int plane)
}
DRM_SPINLOCK(&dev_priv->user_irq_lock);
dev_priv->irq_mask_reg |= mask_reg;
I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
(void) I915_READ (I915REG_INT_MASK_R);
i915_disable_irq(dev_priv, mask_reg);
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
if (pipestat_reg)
{