radeon: add support for vblank on crtc2

This adds support for CRTC2 vblank on radeon similiar to the i915.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c
index aac5db3a0eb0..7dd980055229 100644
--- a/drivers/char/drm/radeon_cp.c
+++ b/drivers/char/drm/radeon_cp.c
@@ -1420,6 +1420,10 @@ static int radeon_do_init_cp(drm_device_t * dev, drm_radeon_init_t * init)
                 return DRM_ERR(EINVAL);
         }
 
+        /* Enable vblank on CRTC1 for older X servers
+         */
+        dev_priv->vblank_crtc = DRM_RADEON_VBLANK_CRTC1;
+
         switch(init->func) {
         case RADEON_INIT_R200_CP:
                 dev_priv->microcode_version = UCODE_R200;