+static int i915_enable_interrupt (drm_device_t *dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ u16 flag;
+
+ flag = 0;
+ if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_A)
+ flag |= VSYNC_PIPEA_FLAG;
+ if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_B)
+ flag |= VSYNC_PIPEB_FLAG;
+ if (dev_priv->vblank_pipe & ~(DRM_I915_VBLANK_PIPE_A|DRM_I915_VBLANK_PIPE_B)) {
+ DRM_ERROR("%s called with invalid pipe 0x%x\n",
+ __FUNCTION__, dev_priv->vblank_pipe);
+ return DRM_ERR(EINVAL);
+ }
+ I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | flag);
+ return 0;
+}
+
+/* Set the vblank monitor pipe
+ */
+int i915_vblank_pipe_set(DRM_IOCTL_ARGS)
+{
+ DRM_DEVICE;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ drm_i915_vblank_pipe_t pipe;
+
+ if (!dev_priv) {
+ DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+ return DRM_ERR(EINVAL);
+ }
+
+ DRM_COPY_FROM_USER_IOCTL(pipe, (drm_i915_vblank_pipe_t __user *) data,
+ sizeof(pipe));
+
+ dev_priv->vblank_pipe = pipe.pipe;
+ return i915_enable_interrupt (dev);
+}
+
+int i915_vblank_pipe_get(DRM_IOCTL_ARGS)
+{
+ DRM_DEVICE;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ drm_i915_vblank_pipe_t pipe;
+ u16 flag;
+
+ if (!dev_priv) {
+ DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+ return DRM_ERR(EINVAL);
+ }
+
+ flag = I915_READ(I915REG_INT_ENABLE_R);
+ pipe.pipe = 0;
+ if (flag & VSYNC_PIPEA_FLAG)
+ pipe.pipe |= DRM_I915_VBLANK_PIPE_A;
+ if (flag & VSYNC_PIPEB_FLAG)
+ pipe.pipe |= DRM_I915_VBLANK_PIPE_B;
+ DRM_COPY_TO_USER_IOCTL((drm_i915_vblank_pipe_t __user *) data, pipe,
+ sizeof(pipe));
+ return 0;
+}
+