radeonsi: Export signalled sync file instead of -1.

-1 is considered an error for EGL_ANDROID_native_fence_sync, so
we need to actually create a sync file.

Fixes: f536f45250 "radeonsi: implement sync_file import/export"
Reviewed-by: Dave Airlie <[email protected]>

2 files changed, 7 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeon/radeon_winsys.h b/src/gallium/drivers/radeon/radeon_winsys.h
index d1c761f4eea..307f8efaec0 100644
--- a/src/gallium/drivers/radeon/radeon_winsys.h
+++ b/src/gallium/drivers/radeon/radeon_winsys.h
@@ -611,6 +611,11 @@ struct radeon_winsys {
 				  struct pipe_fence_handle *fence);
 
     /**
+     * Return a sync file FD that is already signalled.
+     */
+    int (*export_signalled_sync_file)(struct radeon_winsys *ws);
+
+    /**
      * Initialize surface
      *
      * \param ws        The winsys this function is called from.
diff --git a/src/gallium/drivers/radeonsi/si_fence.c b/src/gallium/drivers/radeonsi/si_fence.c
index 5f320803aae..47d68dbc337 100644
--- a/src/gallium/drivers/radeonsi/si_fence.c
+++ b/src/gallium/drivers/radeonsi/si_fence.c
@@ -356,6 +356,8 @@ static int si_fence_get_fd(struct pipe_screen *screen,
 
 	/* If we don't have FDs at this point, it means we don't have fences
 	 * either. */
+	if (sdma_fd == -1 && gfx_fd == -1)
+		return ws->export_signalled_sync_file(ws);
 	if (sdma_fd == -1)
 		return gfx_fd;
 	if (gfx_fd == -1)