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drm: rcar-du: Track dma-buf fences

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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>
This commit is contained in:
Emre Ucan 2018-04-30 14:02:04 +02:00 committed by Laurent Pinchart
parent f1e9a22ac3
commit b06078de41
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/rcar-du/rcar_du_vsp.c
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@ -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>
@ -237,6 +238,10 @@ static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
}
}
ret = drm_gem_fb_prepare_fb(plane, state);
if (ret)
goto fail;
return 0;
fail: