From: Emre Ucan <eucan@de.adit-jv.com>
Date: Mon, 30 Apr 2018 14:02:04 +0200
Subject: drm: rcar-du: Track dma-buf fences
Git-commit: b06078de418d6f77c81aa74516f787663f51a262
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
We have to check dma-buf reservation objects of our framebuffers before
we use them. Otherwise, another driver might be writing on the same
buffer which we are using. This would cause visible tearing effects
on display.
We can use existing atomic helper functions to solve this problem.
Signed-off-by: Emre Ucan <eucan@de.adit-jv.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -17,6 +17,7 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_plane_helper.h>
#include <linux/bitops.h>
@@ -233,6 +234,10 @@ static int rcar_du_vsp_plane_prepare_fb(
}
}
+ ret = drm_gem_fb_prepare_fb(plane, state);
+ if (ret)
+ goto fail;
+
return 0;
fail: