diff options
Diffstat (limited to 'bsd-core')
| -rw-r--r-- | bsd-core/drm_irq.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/bsd-core/drm_irq.c b/bsd-core/drm_irq.c index 57a70263..b76e96dd 100644 --- a/bsd-core/drm_irq.c +++ b/bsd-core/drm_irq.c @@ -72,23 +72,40 @@ static void vblank_disable_fn(void *arg) unsigned long irqflags; int i; + DRM_SPINLOCK_IRQSAVE(&dev->irq_lock, irqflags); + if (callout_pending(&dev->vblank_disable_timer)) { + /* callout was reset */ + DRM_SPINUNLOCK_IRQRESTORE(&dev->irq_lock, irqflags); + return; + } + if (!callout_active(&dev->vblank_disable_timer)) { + /* callout was stopped */ + DRM_SPINUNLOCK_IRQRESTORE(&dev->irq_lock, irqflags); + return; + } + callout_deactivate(&dev->vblank_disable_timer); + for (i = 0; i < dev->num_crtcs; i++) { - DRM_SPINLOCK_IRQSAVE(&dev->irq_lock, irqflags); if (atomic_read(&dev->vblank_refcount[i]) == 0 && dev->vblank_enabled[i]) { dev->driver.disable_vblank(dev, i); dev->vblank_enabled[i] = 0; } - DRM_SPINUNLOCK_IRQRESTORE(&dev->irq_lock, irqflags); } + DRM_SPINUNLOCK_IRQRESTORE(&dev->irq_lock, irqflags); } static void drm_vblank_cleanup(struct drm_device *dev) { + unsigned long irqflags; + /* Bail if the driver didn't call drm_vblank_init() */ if (dev->num_crtcs == 0) return; + DRM_SPINLOCK_IRQSAVE(&dev->irq_lock, irqflags); + callout_stop(&dev->vblank_disable_timer); + DRM_SPINUNLOCK_IRQRESTORE(&dev->irq_lock, irqflags); callout_drain(&dev->vblank_disable_timer); vblank_disable_fn((void *)dev); @@ -117,7 +134,7 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs) { int i, ret = -ENOMEM; - callout_init(&dev->vblank_disable_timer, 0); + callout_init_mtx(&dev->vblank_disable_timer, &dev->irq_lock, 1); atomic_set(&dev->vbl_signal_pending, 0); dev->num_crtcs = num_crtcs; @@ -374,11 +391,15 @@ int drm_vblank_get(struct drm_device *dev, int crtc) void drm_vblank_put(struct drm_device *dev, int crtc) { + unsigned long irqflags; + + DRM_SPINLOCK_IRQSAVE(&dev->irq_lock, irqflags); /* Last user schedules interrupt disable */ atomic_subtract_acq_int(&dev->vblank_refcount[crtc], 1); if (dev->vblank_refcount[crtc] == 0) callout_reset(&dev->vblank_disable_timer, jiffies + 5*DRM_HZ, (timeout_t *)vblank_disable_fn, (void *)dev); + DRM_SPINUNLOCK_IRQRESTORE(&dev->irq_lock, irqflags); } int drm_modeset_ctl(struct drm_device *dev, void *data, |