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authorIan Wisbon <ian.wisbon@timesys.com>2011-02-15 15:53:51 -0500
committerIan Wisbon <ian.wisbon@timesys.com>2011-02-15 15:53:51 -0500
commitdfdbf3f6e2d279f2a46ed95614cb4bf07657394d (patch)
tree2cc05669c5d3e47f7d4b28e31076b6dc6e771f36 /drivers/gpu/drm/drm_irq.c
parenteffff5718c380983788fe6c380671c18e15ac7c2 (diff)
Digi del-5.6 Complete2.6.31-digi-201102151558
Diffstat (limited to 'drivers/gpu/drm/drm_irq.c')
-rw-r--r--drivers/gpu/drm/drm_irq.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index f85aaf21e783..f298434e87c7 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -402,15 +402,21 @@ int drm_vblank_get(struct drm_device *dev, int crtc)
spin_lock_irqsave(&dev->vbl_lock, irqflags);
/* Going from 0->1 means we have to enable interrupts again */
- if (atomic_add_return(1, &dev->vblank_refcount[crtc]) == 1 &&
- !dev->vblank_enabled[crtc]) {
- ret = dev->driver->enable_vblank(dev, crtc);
- DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc, ret);
- if (ret)
+ if (atomic_add_return(1, &dev->vblank_refcount[crtc]) == 1) {
+ if (!dev->vblank_enabled[crtc]) {
+ ret = dev->driver->enable_vblank(dev, crtc);
+ DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc, ret);
+ if (ret)
+ atomic_dec(&dev->vblank_refcount[crtc]);
+ else {
+ dev->vblank_enabled[crtc] = 1;
+ drm_update_vblank_count(dev, crtc);
+ }
+ }
+ } else {
+ if (!dev->vblank_enabled[crtc]) {
atomic_dec(&dev->vblank_refcount[crtc]);
- else {
- dev->vblank_enabled[crtc] = 1;
- drm_update_vblank_count(dev, crtc);
+ ret = -EINVAL;
}
}
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
@@ -437,6 +443,18 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
}
EXPORT_SYMBOL(drm_vblank_put);
+void drm_vblank_off(struct drm_device *dev, int crtc)
+{
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&dev->vbl_lock, irqflags);
+ DRM_WAKEUP(&dev->vbl_queue[crtc]);
+ dev->vblank_enabled[crtc] = 0;
+ dev->last_vblank[crtc] = dev->driver->get_vblank_counter(dev, crtc);
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
+}
+EXPORT_SYMBOL(drm_vblank_off);
+
/**
* drm_vblank_pre_modeset - account for vblanks across mode sets
* @dev: DRM device