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-rw-r--r--shared-core/i915_irq.c46
1 files changed, 24 insertions, 22 deletions
diff --git a/shared-core/i915_irq.c b/shared-core/i915_irq.c
index cfa9320e..58781a4a 100644
--- a/shared-core/i915_irq.c
+++ b/shared-core/i915_irq.c
@@ -440,7 +440,7 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 iir;
- u32 pipea_stats, pipeb_stats;
+ u32 pipea_stats = 0, pipeb_stats = 0;
int vblank = 0;
iir = I915_READ(I915REG_INT_IDENTITY_R);
@@ -463,31 +463,19 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
*/
if (iir & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT) {
pipea_stats = I915_READ(I915REG_PIPEASTAT);
- if (pipea_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
- I915_VBLANK_INTERRUPT_STATUS))
- {
- vblank++;
- drm_handle_vblank(dev, i915_get_plane(dev, 0));
- }
I915_WRITE(I915REG_PIPEASTAT, pipea_stats);
}
if (iir & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT) {
pipeb_stats = I915_READ(I915REG_PIPEBSTAT);
- if (pipeb_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
- I915_VBLANK_INTERRUPT_STATUS))
- {
- vblank++;
- drm_handle_vblank(dev, i915_get_plane(dev, 1));
- }
I915_WRITE(I915REG_PIPEBSTAT, pipeb_stats);
}
+ I915_WRITE(I915REG_INT_IDENTITY_R, iir);
+ (void) I915_READ(I915REG_INT_IDENTITY_R); /* Flush posted writes */
+
if (dev_priv->sarea_priv)
dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
- I915_WRITE(I915REG_INT_IDENTITY_R, iir);
- (void) I915_READ(I915REG_INT_IDENTITY_R); /* Flush posted write */
-
if (iir & I915_USER_INTERRUPT) {
DRM_WAKEUP(&dev_priv->irq_queue);
#ifdef I915_HAVE_FENCE
@@ -495,6 +483,16 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
#endif
}
+ if (pipea_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
+ I915_VBLANK_INTERRUPT_STATUS)) {
+ vblank = 1;
+ drm_handle_vblank(dev, i915_get_plane(dev, 0));
+ }
+ if (pipeb_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
+ I915_VBLANK_INTERRUPT_STATUS)) {
+ vblank = 1;
+ drm_handle_vblank(dev, i915_get_plane(dev, 1));
+ }
if (vblank) {
if (dev_priv->swaps_pending > 0)
drm_locked_tasklet(dev, i915_vblank_tasklet);
@@ -526,9 +524,11 @@ 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)){
- dev_priv->irq_mask_reg &= ~I915_USER_INTERRUPT;
- I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
- (void) I915_READ (I915REG_INT_ENABLE_R);
+ 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);
+ }
}
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
@@ -539,9 +539,11 @@ 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)) {
- 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_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);
+ }
}
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
}