[PATCH] drm/mediatek: Find the cursor plane instead of hard coding it

[CK Hu]

Hi, Evan:

On Fri, 2020-02-07 at 15:23 +1100, Evan Benn wrote:
> The cursor and primary planes were hard coded.
> Now search for them for passing to drm_crtc_init_with_planes
> 

Reviewed-by: CK Hu <ck.hu at mediatek.com>

> Signed-off-by: Evan Benn <evanbenn at chromium.org>
> ---
> 
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 18 ++++++++++++------
>  1 file changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 7b392d6c71cc..935652990afa 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -658,10 +658,18 @@ static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
>  
>  static int mtk_drm_crtc_init(struct drm_device *drm,
>  			     struct mtk_drm_crtc *mtk_crtc,
> -			     struct drm_plane *primary,
> -			     struct drm_plane *cursor, unsigned int pipe)
> +			     unsigned int pipe)
>  {
> -	int ret;
> +	struct drm_plane *primary = NULL;
> +	struct drm_plane *cursor = NULL;
> +	int i, ret;
> +
> +	for (i = 0; i < mtk_crtc->layer_nr; i++) {
> +		if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_PRIMARY)
> +			primary = &mtk_crtc->planes[i];
> +		else if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_CURSOR)
> +			cursor = &mtk_crtc->planes[i];
> +	}
>  
>  	ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
>  					&mtk_crtc_funcs, NULL);
> @@ -830,9 +838,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  			return ret;
>  	}
>  
> -	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
> -				mtk_crtc->layer_nr > 1 ? &mtk_crtc->planes[1] :
> -				NULL, pipe);
> +	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
>  	if (ret < 0)
>  		return ret;
>