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path: root/drivers/gpu/drm/i915/i915_irq.c
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Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
-rw-r--r--drivers/gpu/drm/i915/i915_irq.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 0cadafb..87b6b60 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -174,6 +174,19 @@ u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
return count;
}
+u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ int reg = pipe ? PIPEB_FRMCOUNT_GM45 : PIPEA_FRMCOUNT_GM45;
+
+ if (!i915_pipe_enabled(dev, pipe)) {
+ DRM_ERROR("trying to get vblank count for disabled pipe %d\n", pipe);
+ return 0;
+ }
+
+ return I915_READ(reg);
+}
+
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
@@ -370,12 +383,13 @@ int i915_irq_emit(struct drm_device *dev, void *data,
drm_i915_irq_emit_t *emit = data;
int result;
- RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
-
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
+
+ RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
+
mutex_lock(&dev->struct_mutex);
result = i915_emit_irq(dev);
mutex_unlock(&dev->struct_mutex);
@@ -411,6 +425,12 @@ int i915_enable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
+ int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
+ u32 pipeconf;
+
+ pipeconf = I915_READ(pipeconf_reg);
+ if (!(pipeconf & PIPEACONF_ENABLE))
+ return -EINVAL;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
if (IS_I965G(dev))
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