drm/r600: fix rptr address along lines of previous fixes to radeon.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/r600_cp.c b/drivers/gpu/drm/radeon/r600_cp.c
index 54ea867..37249b2 100644 (file)
--- a/drivers/gpu/drm/radeon/r600_cp.c
+++ b/drivers/gpu/drm/radeon/r600_cp.c
@@ -1689,18 +1689,12 @@ static void r600_cp_init_ring_buffer(struct drm_device *dev,
        } else
 #endif
        {
-               struct drm_sg_mem *entry = dev->sg;
-               unsigned long tmp_ofs, page_ofs;
-
-               tmp_ofs = dev_priv->ring_rptr->offset -
-                         (unsigned long)dev->sg->virtual;
-               page_ofs = tmp_ofs >> PAGE_SHIFT;
+               RADEON_WRITE(R600_CP_RB_RPTR_ADDR,
+                            dev_priv->ring_rptr->offset
+                            - ((unsigned long) dev->sg->virtual)
+                            + dev_priv->gart_vm_start);
 
-               RADEON_WRITE(R600_CP_RB_RPTR_ADDR, entry->busaddr[page_ofs] >> 8);
                RADEON_WRITE(R600_CP_RB_RPTR_ADDR_HI, 0);
-               DRM_DEBUG("ring rptr: offset=0x%08lx handle=0x%08lx\n",
-                         (unsigned long)entry->busaddr[page_ofs],
-                         entry->handle + tmp_ofs);
        }
 
 #ifdef __BIG_ENDIAN