vmwgfx: Add page flip support

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 24efcae3e2f5..2286d47e5022 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1681,6 +1681,70 @@ int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
         return 0;
 }
 
+int vmw_du_page_flip(struct drm_crtc *crtc,
+                     struct drm_framebuffer *fb,
+                     struct drm_pending_vblank_event *event)
+{
+        struct vmw_private *dev_priv = vmw_priv(crtc->dev);
+        struct drm_framebuffer *old_fb = crtc->fb;
+        struct vmw_framebuffer *vfb = vmw_framebuffer_to_vfb(fb);
+        struct drm_file *file_priv = event->base.file_priv;
+        struct vmw_fence_obj *fence = NULL;
+        struct drm_clip_rect clips;
+        int ret;
+
+        /* require ScreenObject support for page flipping */
+        if (!dev_priv->sou_priv)
+                return -ENOSYS;
+
+        if (!vmw_kms_screen_object_flippable(dev_priv, crtc))
+                return -EINVAL;
+
+        crtc->fb = fb;
+
+        /* do a full screen dirty update */
+        clips.x1 = clips.y1 = 0;
+        clips.x2 = fb->width;
+        clips.y2 = fb->height;
+
+        if (vfb->dmabuf)
+                ret = do_dmabuf_dirty_sou(file_priv, dev_priv, vfb,
+                                          0, 0, &clips, 1, 1, &fence);
+        else
+                ret = do_surface_dirty_sou(dev_priv, file_priv, vfb,
+                                           0, 0, &clips, 1, 1, &fence);
+
+
+        if (ret != 0)
+                goto out_no_fence;
+        if (!fence) {
+                ret = -EINVAL;
+                goto out_no_fence;
+        }
+
+        ret = vmw_event_fence_action_queue(file_priv, fence,
+                                           &event->base,
+                                           &event->event.tv_sec,
+                                           &event->event.tv_usec,
+                                           true);
+
+        /*
+         * No need to hold on to this now. The only cleanup
+         * we need to do if we fail is unref the fence.
+         */
+        vmw_fence_obj_unreference(&fence);
+
+        if (vmw_crtc_to_du(crtc)->is_implicit)
+                vmw_kms_screen_object_update_implicit_fb(dev_priv, crtc);
+
+        return ret;
+
+out_no_fence:
+        crtc->fb = old_fb;
+        return ret;
+}
+
+
 void vmw_du_crtc_save(struct drm_crtc *crtc)
 {
 }