drm: i915: Add ioctl for scheduling buffer swaps at vertical blanks.

This uses the core facility to schedule a driver callback that will be called
ASAP after the given vertical blank interrupt with the HW lock held.

Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/char/drm/i915_drm.h b/drivers/char/drm/i915_drm.h
index 6af83e613f27..8926beb5a61f 100644
--- a/drivers/char/drm/i915_drm.h
+++ b/drivers/char/drm/i915_drm.h
@@ -132,6 +132,7 @@ typedef struct _drm_i915_sarea {
 #define DRM_I915_DESTROY_HEAP   0x0c
 #define DRM_I915_SET_VBLANK_PIPE        0x0d
 #define DRM_I915_GET_VBLANK_PIPE        0x0e
+#define DRM_I915_VBLANK_SWAP    0x0f
 
 #define DRM_IOCTL_I915_INIT             DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
 #define DRM_IOCTL_I915_FLUSH            DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
@@ -243,4 +244,12 @@ typedef struct drm_i915_vblank_pipe {
         int pipe;
 } drm_i915_vblank_pipe_t;
 
+/* Schedule buffer swap at given vertical blank:
+ */
+typedef struct drm_i915_vblank_swap {
+        drm_drawable_t drawable;
+        unsigned int pipe;
+        unsigned int sequence;
+} drm_i915_vblank_swap_t;
+
 #endif                          /* _I915_DRM_H_ */