Hi, Stu:

On Thu, 2018-08-09 at 10:15 +0800, Stu Hsieh wrote:
> This patch add the comment about color format setting for OVL
> 
> Signed-off-by: Stu Hsieh <stu.hs...@mediatek.com>

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

> ---
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c 
> b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index 978782a77629..0facd823c552 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -157,6 +157,11 @@ static void mtk_ovl_layer_off(struct mtk_ddp_comp *comp, 
> unsigned int idx)
>  
>  static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int 
> fmt)
>  {
> +     /* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX"
> +      * is defined in mediatek HW data sheet.
> +      * The alphabet order in XXX is no relation to data
> +      * arrangement in memory.
> +      */
>       switch (fmt) {
>       default:
>       case DRM_FORMAT_RGB565:


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