- 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]) {