linux-kernel - Re: [PATCH 11/18] drm/medaitek: add layer

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Date:   Thu, 27 Dec 2018 09:16:39 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Yongqiang Niu <yongqiang.niu@...iatek.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH 11/18] drm/medaitek: add layer_nr for ovl private data

Hi, Yongqiang:

On Mon, 2018-12-24 at 16:08 +0800, Yongqiang Niu wrote:
> This patch add layer_nr for ovl private data
> 

I think you do this because ovl-2l and ovl share the same driver and the
ovl layer is different, so this patch is a preparation for ovl-2l and
ovl share the same driver. Describe more information for this patch.

Regards,
CK

> Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index afb313c..a0ab760 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -60,6 +60,7 @@
>  struct mtk_disp_ovl_data {
>  	unsigned int addr;
>  	unsigned int gmc_bits;
> +	unsigned int layer_nr;
>  	bool fmt_rgb565_is_0;
>  };
>  
> @@ -137,7 +138,9 @@ static void mtk_ovl_config(struct mtk_ddp_comp *comp, unsigned int w,
>  
>  static unsigned int mtk_ovl_layer_nr(struct mtk_ddp_comp *comp)
>  {
> -	return 4;
> +	struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
> +
> +	return ovl->data->layer_nr;
>  }
>  
>  static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
> @@ -342,12 +345,14 @@ static int mtk_disp_ovl_remove(struct platform_device *pdev)
>  static const struct mtk_disp_ovl_data mt2701_ovl_driver_data = {
>  	.addr = DISP_REG_OVL_ADDR_MT2701,
>  	.gmc_bits = 8,
> +	.layer_nr = 4,
>  	.fmt_rgb565_is_0 = false,
>  };
>  
>  static const struct mtk_disp_ovl_data mt8173_ovl_driver_data = {
>  	.addr = DISP_REG_OVL_ADDR_MT8173,
>  	.gmc_bits = 8,
> +	.layer_nr = 4,
>  	.fmt_rgb565_is_0 = true,
>  };
>