vmwgfx: Add page flip support

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / vmwgfx / vmwgfx_scrn.c

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
index 4defdcf1c72e2023eaf23f8598c0b83f2803b289..97aca0bf94d0df19f050e757860bbf0fdab617c7 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
@@ -394,6 +394,7 @@ static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
        .gamma_set = vmw_du_crtc_gamma_set,
        .destroy = vmw_sou_crtc_destroy,
        .set_config = vmw_sou_crtc_set_config,
+       .page_flip = vmw_du_page_flip,
 };
 
 /*
@@ -535,3 +536,36 @@ int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
 
        return 0;
 }
+
+/**
+ * Returns if this unit can be page flipped.
+ * Must be called with the mode_config mutex held.
+ */
+bool vmw_kms_screen_object_flippable(struct vmw_private *dev_priv,
+                                    struct drm_crtc *crtc)
+{
+       struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
+
+       if (!sou->base.is_implicit)
+               return true;
+
+       if (dev_priv->sou_priv->num_implicit != 1)
+               return false;
+
+       return true;
+}
+
+/**
+ * Update the implicit fb to the current fb of this crtc.
+ * Must be called with the mode_config mutex held.
+ */
+void vmw_kms_screen_object_update_implicit_fb(struct vmw_private *dev_priv,
+                                             struct drm_crtc *crtc)
+{
+       struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
+
+       BUG_ON(!sou->base.is_implicit);
+
+       dev_priv->sou_priv->implicit_fb =
+               vmw_framebuffer_to_vfb(sou->base.crtc.fb);
+}