Re: [PATCH v2 7/7] drm/msm/dpu: Make _dpu_plane_get_aspace void

[Sean Paul <sean-p7yTbzM4H96eqtR555YLDQ@public.gmane.org>]

On Thu, Sep 20, 2018 at 12:49:24PM -0400, Bruce Wang wrote:
> Remove unneeded checks from _dpu_plane_get_aspace. The function
> no longer needs to return anything so it is changed to void.
> 
> Signed-off-by: Bruce Wang <bzwang@chromium.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 25 ++++-------------------
>  1 file changed, 4 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> index f9e65acdf87e..59f019685658 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> @@ -434,23 +434,14 @@ static void _dpu_plane_set_qos_remap(struct drm_plane *plane)
>  /**
>   * _dpu_plane_get_aspace: gets the address space
>   */
> -static int _dpu_plane_get_aspace(
> +static void _dpu_plane_get_aspace(
>  		struct dpu_plane *pdpu,
>  		struct dpu_plane_state *pstate,
>  		struct msm_gem_address_space **aspace)
>  {
> -	struct dpu_kms *kms;
> -
> -	if (!pdpu || !pstate || !aspace) {
> -		DPU_ERROR("invalid parameters\n");
> -		return -EINVAL;
> -	}
> -
> -	kms = _dpu_plane_get_kms(&pdpu->base);
> +	struct dpu_kms *kms = _dpu_plane_get_kms(&pdpu->base);
>  
>  	*aspace = kms->base.aspace;

I think we could make this better by one of two ways.

1- Just use aspace = _dpu_plane_get_kms(&pdpu->base)->base.aspace; at the
   callsites.

2- Make the return value struct msm_gem_address_space * and return the value
   from the function.

Sean

> -
> -	return 0;
>  }
>  
>  static inline void _dpu_plane_set_scanout(struct drm_plane *plane,
> @@ -471,11 +462,7 @@ static inline void _dpu_plane_set_scanout(struct drm_plane *plane,
>  
>  	pdpu = to_dpu_plane(plane);
>  
> -	ret = _dpu_plane_get_aspace(pdpu, pstate, &aspace);
> -	if (ret) {
> -		DPU_ERROR_PLANE(pdpu, "Failed to get aspace %d\n", ret);
> -		return;
> -	}
> +	_dpu_plane_get_aspace(pdpu, pstate, &aspace);
>  
>  	ret = dpu_format_populate_layout(aspace, fb, &pipe_cfg->layout);
>  	if (ret == -EAGAIN)
> @@ -836,11 +823,7 @@ static int dpu_plane_prepare_fb(struct drm_plane *plane,
>  
>  	DPU_DEBUG_PLANE(pdpu, "FB[%u]\n", fb->base.id);
>  
> -	ret = _dpu_plane_get_aspace(pdpu, pstate, &aspace);
> -	if (ret) {
> -		DPU_ERROR_PLANE(pdpu, "Failed to get aspace\n");
> -		return ret;
> -	}
> +	_dpu_plane_get_aspace(pdpu, pstate, &aspace);
>  
>  	/* cache aspace */
>  	pstate->aspace = aspace;
> -- 
> 2.19.0.444.g18242da7ef-goog
> 
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-- 
Sean Paul, Software Engineer, Google / Chromium OS
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