diff options
Diffstat (limited to 'shared-core')
| -rw-r--r-- | shared-core/radeon_irq.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/shared-core/radeon_irq.c b/shared-core/radeon_irq.c index 7b170389..d652f1d2 100644 --- a/shared-core/radeon_irq.c +++ b/shared-core/radeon_irq.c @@ -163,6 +163,45 @@ int radeon_emit_and_wait_irq(drm_device_t *dev) } +int radeon_vblank_wait(drm_device_t *dev, unsigned int *sequence) +{ + drm_radeon_private_t *dev_priv = + (drm_radeon_private_t *)dev->dev_private; + unsigned int cur_vblank; + int ret = 0; + + if ( !dev_priv ) { + DRM_ERROR( "%s called with no initialization\n", __func__ ); + return DRM_ERR(EINVAL); + } + + /* Assume that the user has missed the current sequence number by about + * a day rather than she wants to wait for years using vertical blanks :) + */ + while ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) ) + + ~*sequence + 1 ) > (1<<23) ) { + dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE; +#ifdef __linux__ + interruptible_sleep_on( &dev->vbl_queue ); + + if (signal_pending(current)) { + ret = -EINTR; + break; + } +#endif /* __linux__ */ +#ifdef __FreeBSD__ + ret = tsleep( &dev_priv->vbl_queue, 3*hz, "rdnvbl", PZERO | PCATCH); + if (ret) + break; +#endif /* __FreeBSD__ */ + } + + *sequence = cur_vblank; + + return ret; +} + + /* Needs the lock as it touches the ring. */ int radeon_irq_emit( DRM_IOCTL_ARGS ) |