diff options
| -rw-r--r-- | linux-core/drmP.h | 2 | ||||
| -rw-r--r-- | linux-core/drm_irq.c | 18 |
2 files changed, 17 insertions, 3 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h index 6e4d6dda..19168cd7 100644 --- a/linux-core/drmP.h +++ b/linux-core/drmP.h @@ -848,6 +848,8 @@ struct drm_device { atomic_t *vblank_refcount; /* number of users of vblank interrupts per crtc */ u32 *last_vblank; /* protected by dev->vbl_lock, used */ /* for wraparound handling */ + int *vblank_enabled; /* so we don't call enable more than + once per disable */ int *vblank_inmodeset; /* Display driver is setting mode */ struct timer_list vblank_disable_timer; diff --git a/linux-core/drm_irq.c b/linux-core/drm_irq.c index 7c056114..d0d6f987 100644 --- a/linux-core/drm_irq.c +++ b/linux-core/drm_irq.c @@ -82,11 +82,13 @@ static void vblank_disable_fn(unsigned long arg) for (i = 0; i < dev->num_crtcs; i++) { spin_lock_irqsave(&dev->vbl_lock, irqflags); - if (atomic_read(&dev->vblank_refcount[i]) == 0) { + 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; } spin_unlock_irqrestore(&dev->vbl_lock, irqflags); } @@ -110,6 +112,8 @@ static void drm_vblank_cleanup(struct drm_device *dev) dev->num_crtcs, DRM_MEM_DRIVER); drm_free(dev->vblank_refcount, sizeof(*dev->vblank_refcount) * dev->num_crtcs, DRM_MEM_DRIVER); + drm_free(dev->vblank_enabled, sizeof(*dev->vblank_enabled) * + dev->num_crtcs, DRM_MEM_DRIVER); drm_free(dev->last_vblank, sizeof(*dev->last_vblank) * dev->num_crtcs, DRM_MEM_DRIVER); drm_free(dev->vblank_inmodeset, sizeof(*dev->vblank_inmodeset) * @@ -148,6 +152,11 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs) if (!dev->vblank_refcount) goto err; + dev->vblank_enabled = drm_calloc(num_crtcs, sizeof(int), + DRM_MEM_DRIVER); + if (!dev->vblank_enabled) + goto err; + dev->last_vblank = drm_calloc(num_crtcs, sizeof(u32), DRM_MEM_DRIVER); if (!dev->last_vblank) goto err; @@ -387,12 +396,15 @@ 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) { + if (atomic_add_return(1, &dev->vblank_refcount[crtc]) == 1 && + !dev->vblank_enabled[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); + } } spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |