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From:   Chun-Kuang Hu <chunkuang.hu@kernel.org>
Date:   Fri, 21 Aug 2020 07:43:36 +0800
Message-ID: <CAAOTY_8LnY3Tbzhmeia5DS7o1WAxd0kz9oVCeKLvwNCn48j_Dg@mail.gmail.com>
Subject: Re: [PATCH v1 07/21] drm/mediatek: enable OVL_LAYER_SMI_ID_EN for
 multi-layer usecase
To:     Yongqiang Niu <yongqiang.niu@mediatek.com>
Cc:     CK Hu <ck.hu@mediatek.com>, Philipp Zabel <p.zabel@pengutronix.de>,
        Rob Herring <robh+dt@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Mark Rutland <mark.rutland@arm.com>,
        devicetree@vger.kernel.org, David Airlie <airlied@linux.ie>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        DRI Development <dri-devel@lists.freedesktop.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@lists.infradead.org>,
        Daniel Vetter <daniel@ffwll.ch>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
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HI, Yongqiang:

Yongqiang Niu <yongqiang.niu@mediatek.com> =E6=96=BC 2020=E5=B9=B48=E6=9C=
=8820=E6=97=A5 =E9=80=B1=E5=9B=9B =E4=B8=8B=E5=8D=882:06=E5=AF=AB=E9=81=93=
=EF=BC=9A
>
> enable OVL_LAYER_SMI_ID_EN for multi-layer usecase
>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/me=
diatek/mtk_disp_ovl.c
> index 8cf9f3b..427fe7f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -23,6 +23,7 @@
>  #define DISP_REG_OVL_RST                       0x0014
>  #define DISP_REG_OVL_ROI_SIZE                  0x0020
>  #define DISP_REG_OVL_DATAPATH_CON              0x0024
> +#define OVL_LAYER_SMI_ID_EN                            BIT(0)
>  #define OVL_BGCLR_SEL_IN                               BIT(2)
>  #define DISP_REG_OVL_ROI_BGCLR                 0x0028
>  #define DISP_REG_OVL_SRC_CON                   0x002c
> @@ -116,6 +117,8 @@ static void mtk_ovl_disable_vblank(struct mtk_ddp_com=
p *comp)
>  static void mtk_ovl_start(struct mtk_ddp_comp *comp)
>  {
>         writel_relaxed(0x1, comp->regs + DISP_REG_OVL_EN);
> +       mtk_ddp_write_mask(NULL, OVL_LAYER_SMI_ID_EN, comp,

writel_relaxed instead of mtk_ddp_write_mask.

> +                          DISP_REG_OVL_DATAPATH_CON, OVL_LAYER_SMI_ID_EN=
);

If this only should set in mt8192, add a private data to distinguish this.

Regards,
Chun-Kuang.

>  }
>
>  static void mtk_ovl_stop(struct mtk_ddp_comp *comp)
> --
> 1.8.1.1.dirty
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