[PATCH] drm/vmwgfx: Fix overlay when using Screen Targets

[Ian Forbes]

This code was never updated to support Screen Targets.
Fixes a bug where Xv playback displays a green screen instead of actual
video contents when 3D acceleration is disabled in the guest.

Fixes: c8261a961ece ("vmwgfx: Major KMS refactoring / cleanup in preparation of screen targets")
Reported-by: Doug Brown <doug at schmorgal.com>
Closes: https://lore.kernel.org/all/bd9cb3c7-90e8-435d-bc28-0e38fee58977@schmorgal.com
Signed-off-by: Ian Forbes <ian.forbes at broadcom.com>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c
index c45b4724e4141..e20f64b67b266 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c
@@ -92,7 +92,7 @@ static int vmw_overlay_send_put(struct vmw_private *dev_priv,
 {
 	struct vmw_escape_video_flush *flush;
 	size_t fifo_size;
-	bool have_so = (dev_priv->active_display_unit == vmw_du_screen_object);
+	bool have_so = (dev_priv->active_display_unit != vmw_du_legacy);
 	int i, num_items;
 	SVGAGuestPtr ptr;
 
-- 
2.34.1