linux-kernel - Re: [PATCH v6 3/6] drm/msm: use drm_atomic_set_fence_for

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Message-ID: <20161028073416.ijkga3umleopkye4@phenom.ffwll.local>
Date:   Fri, 28 Oct 2016 09:34:16 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Gustavo Padovan <gustavo@...ovan.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Daniel Stone <daniels@...labora.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Rob Clark <robdclark@...il.com>,
        Greg Hackmann <ghackmann@...gle.com>,
        John Harrison <John.C.Harrison@...el.com>,
        laurent.pinchart@...asonboard.com, seanpaul@...gle.com,
        marcheu@...gle.com, m.chehab@...sung.com,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Brian Starkey <brian.starkey@....com>,
        Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: Re: [PATCH v6 3/6] drm/msm: use drm_atomic_set_fence_for_plane() to
 set the fence

On Thu, Oct 27, 2016 at 05:37:08PM -0200, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
> 
> drm_atomic_set_fence_for_plane() is smart and won't overwrite
> plane_state->fence if the user already set an explicit fence there.
> 
> Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>

Reviewed-by: Daniel Vetter <daniel.vetter@...ll.ch>

> ---
>  drivers/gpu/drm/msm/msm_atomic.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
> index db193f8..4e21e1d 100644
> --- a/drivers/gpu/drm/msm/msm_atomic.c
> +++ b/drivers/gpu/drm/msm/msm_atomic.c
> @@ -217,8 +217,9 @@ int msm_atomic_commit(struct drm_device *dev,
>  		if ((plane->state->fb != plane_state->fb) && plane_state->fb) {
>  			struct drm_gem_object *obj = msm_framebuffer_bo(plane_state->fb, 0);
>  			struct msm_gem_object *msm_obj = to_msm_bo(obj);
> +			struct dma_fence *fence = reservation_object_get_excl_rcu(msm_obj->resv);
>  
> -			plane_state->fence = reservation_object_get_excl_rcu(msm_obj->resv);
> +			drm_atomic_set_fence_for_plane(plane_state, fence);
>  		}
>  	}
>  
> -- 
> 2.5.5
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch