Re: [PATCH v7 16/23] drm/mediatek: Start/Stop components with function pointers

["CK Hu (胡俊光)" <ck.hu@mediatek.com>]

Hi, Hsiao-chien:

On Fri, 2023-10-06 at 15:38 +0800, Hsiao Chien Sung wrote:
> By registering component related functions to the pointers,
> we can easily manage them within a for-loop and simplify the
> logic of component start/stop process.

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

> 
> Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
> ---
>  .../gpu/drm/mediatek/mtk_disp_ovl_adaptor.c   | 20
> +++++++++++++++++--
>  1 file changed, 18 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> index 84133303a6ec..812a1df9732f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> @@ -72,6 +72,8 @@ static const char * const
> private_comp_stem[OVL_ADAPTOR_TYPE_NUM] = {
>  static const struct mtk_ddp_comp_funcs _ethdr = {
>  	.clk_enable = mtk_ethdr_clk_enable,
>  	.clk_disable = mtk_ethdr_clk_disable,
> +	.start = mtk_ethdr_start,
> +	.stop = mtk_ethdr_stop,
>  };
>  
>  static const struct mtk_ddp_comp_funcs _merge = {
> @@ -189,16 +191,30 @@ void mtk_ovl_adaptor_config(struct device *dev,
> unsigned int w,
>  
>  void mtk_ovl_adaptor_start(struct device *dev)
>  {
> +	int i;
>  	struct mtk_disp_ovl_adaptor *ovl_adaptor =
> dev_get_drvdata(dev);
>  
> -	mtk_ethdr_start(ovl_adaptor-
> >ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]);
> +	for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
> +		if (!ovl_adaptor->ovl_adaptor_comp[i] ||
> +		    !comp_matches[i].funcs->start)
> +			continue;
> +
> +		comp_matches[i].funcs->start(ovl_adaptor-
> >ovl_adaptor_comp[i]);
> +	}
>  }
>  
>  void mtk_ovl_adaptor_stop(struct device *dev)
>  {
> +	int i;
>  	struct mtk_disp_ovl_adaptor *ovl_adaptor =
> dev_get_drvdata(dev);
>  
> -	mtk_ethdr_stop(ovl_adaptor-
> >ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]);
> +	for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
> +		if (!ovl_adaptor->ovl_adaptor_comp[i] ||
> +		    !comp_matches[i].funcs->stop)
> +			continue;
> +
> +		comp_matches[i].funcs->stop(ovl_adaptor-
> >ovl_adaptor_comp[i]);
> +	}
>  }
>  
>  int mtk_ovl_adaptor_clk_enable(struct device *dev)