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-rw-r--r--bsd-core/drmP.h1
-rw-r--r--bsd-core/drm_irq.c58
2 files changed, 36 insertions, 23 deletions
diff --git a/bsd-core/drmP.h b/bsd-core/drmP.h
index b0a23e9c..2f2ffb3c 100644
--- a/bsd-core/drmP.h
+++ b/bsd-core/drmP.h
@@ -787,6 +787,7 @@ struct drm_device {
atomic_t context_flag; /* Context swapping flag */
int last_context; /* Last current context */
+ int vblank_disable_allowed;
wait_queue_head_t *vbl_queue; /* vblank wait queue */
atomic_t *_vblank_count; /* number of VBLANK interrupts */
/* (driver must alloc the right number of counters) */
diff --git a/bsd-core/drm_irq.c b/bsd-core/drm_irq.c
index a066cfc9..4b515ad8 100644
--- a/bsd-core/drm_irq.c
+++ b/bsd-core/drm_irq.c
@@ -81,9 +81,15 @@ static void vblank_disable_fn(void *arg)
}
callout_deactivate(&dev->vblank_disable_timer);
+ if (!dev->vblank_disable_allowed)
+ return;
+
for (i = 0; i < dev->num_crtcs; i++) {
if (atomic_read(&dev->vblank_refcount[i]) == 0 &&
dev->vblank_enabled[i]) {
+ DRM_DEBUG("disabling vblank on crtc %d\n", i);
+ dev->last_vblank[i] =
+ dev->driver.get_vblank_counter(dev, i);
dev->driver.disable_vblank(dev, i);
dev->vblank_enabled[i] = 0;
}
@@ -181,6 +187,8 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs)
atomic_set(&dev->vblank_refcount[i], 0);
}
+ dev->vblank_disable_allowed = 0;
+
return 0;
err:
@@ -334,7 +342,6 @@ u32 drm_vblank_count(struct drm_device *dev, int crtc)
void drm_update_vblank_count(struct drm_device *dev, int crtc)
{
- unsigned long irqflags;
u32 cur_vblank, diff;
if (dev->vblank_suspend[crtc])
@@ -348,7 +355,6 @@ void drm_update_vblank_count(struct drm_device *dev, int crtc)
* a long time.
*/
cur_vblank = dev->driver.get_vblank_counter(dev, crtc);
- DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
if (cur_vblank < dev->last_vblank[crtc]) {
if (cur_vblank == dev->last_vblank[crtc] - 1) {
diff = 0;
@@ -364,7 +370,9 @@ void drm_update_vblank_count(struct drm_device *dev, int crtc)
diff = cur_vblank - dev->last_vblank[crtc];
}
dev->last_vblank[crtc] = cur_vblank;
- DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
+
+ DRM_DEBUG("enabling vblank interrupts on crtc %d, missed %d\n",
+ crtc, diff);
atomic_add(diff, &dev->_vblank_count[crtc]);
}
@@ -382,8 +390,10 @@ int drm_vblank_get(struct drm_device *dev, int crtc)
ret = dev->driver.enable_vblank(dev, crtc);
if (ret)
atomic_dec(&dev->vblank_refcount[crtc]);
- else
+ else {
dev->vblank_enabled[crtc] = 1;
+ drm_update_vblank_count(dev, crtc);
+ }
}
DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
@@ -407,6 +417,8 @@ int drm_modeset_ctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_modeset_ctl *modeset = data;
+ unsigned long irqflags;
+ u32 new, diff;
int crtc, ret = 0;
crtc = modeset->crtc;
@@ -417,27 +429,28 @@ int drm_modeset_ctl(struct drm_device *dev, void *data,
switch (modeset->cmd) {
case _DRM_PRE_MODESET:
- dev->vblank_premodeset[crtc] =
- dev->driver.get_vblank_counter(dev, crtc);
- dev->vblank_suspend[crtc] = 1;
+ DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
+ dev->vblank_disable_allowed = 1;
+ if (!dev->vblank_enabled[crtc]) {
+ dev->vblank_premodeset[crtc] =
+ dev->driver.get_vblank_counter(dev, crtc);
+ dev->vblank_suspend[crtc] = 1;
+ }
+ DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
break;
case _DRM_POST_MODESET:
- if (dev->vblank_suspend[crtc]) {
- u32 new = dev->driver.get_vblank_counter(dev, crtc);
-
- /* Compensate for spurious wraparound */
- if (new < dev->vblank_premodeset[crtc]) {
- atomic_sub(dev->max_vblank_count + new -
- dev->vblank_premodeset[crtc],
- &dev->_vblank_count[crtc]);
- DRM_DEBUG("vblank_premodeset[%d]=0x%x, new=0x%x"
- " => _vblank_count[%d]-=0x%x\n", crtc,
- dev->vblank_premodeset[crtc], new,
- crtc, dev->max_vblank_count + new -
- dev->vblank_premodeset[crtc]);
- }
+ DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
+ dev->vblank_disable_allowed = 1;
+ new = dev->driver.get_vblank_counter(dev, crtc);
+ if (dev->vblank_suspend[crtc] && !dev->vblank_enabled[crtc]) {
+ if (new > dev->vblank_premodeset[crtc])
+ diff = dev->vblank_premodeset[crtc] - new;
+ else
+ diff = new;
+ atomic_add(diff, &dev->_vblank_count[crtc]);
}
dev->vblank_suspend[crtc] = 0;
+ DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
break;
default:
ret = EINVAL;
@@ -471,7 +484,6 @@ int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_pr
if (crtc >= dev->num_crtcs)
return EINVAL;
- drm_update_vblank_count(dev, crtc);
seq = drm_vblank_count(dev, crtc);
switch (vblwait->request.type & _DRM_VBLANK_TYPES_MASK) {
@@ -569,7 +581,7 @@ void drm_vbl_send_signals(struct drm_device *dev, int crtc )
void drm_handle_vblank(struct drm_device *dev, int crtc)
{
- drm_update_vblank_count(dev, crtc);
+ atomic_inc(&dev->_vblank_count[crtc]);
DRM_WAKEUP(&dev->vbl_queue[crtc]);
drm_vbl_send_signals(dev, crtc);
}