Message-ID: <CAAOTY_9ObwPwKt6nRc_qSu9JE3WbqeRDEpKObnxsfhENbkT+iw@mail.gmail.com>
Date:   Tue, 29 Dec 2020 00:38:05 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Yongqiang Niu <yongqiang.niu@...iatek.com>
Cc:     CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        DTML <devicetree@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3, 7/8] soc: mediatek: mmsys: Use function call for
 setting mmsys ovl mout register

Hi, Yongqiang:

Yongqiang Niu <yongqiang.niu@...iatek.com> 於 2020年12月28日 週一 下午4:38寫道：
>
> Use function call for setting mmsys ovl mout register
>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> ---
>  drivers/soc/mediatek/mmsys/mtk-mmsys.c | 20 ++++++++++++++++++++
>  include/linux/soc/mediatek/mtk-mmsys.h |  3 +++
>  2 files changed, 23 insertions(+)
>
> diff --git a/drivers/soc/mediatek/mmsys/mtk-mmsys.c b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> index dae665b..ea36a11 100644
> --- a/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> +++ b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> @@ -74,6 +74,17 @@ void mtk_mmsys_ddp_connect(struct device *dev,
>                 reg = readl_relaxed(mmsys->regs + addr) | value;
>                 writel_relaxed(reg, mmsys->regs + addr);
>         }
> +
> +       if (!funcs->ovl_mout_en)
> +               return;
> +
> +       if (funcs->ovl_mout_en) {
> +               value = funcs->ovl_mout_en(cur, next, &addr);
> +               if (value) {
> +                       reg = readl_relaxed(mmsys->regs + addr) | value;
> +                       writel_relaxed(reg, mmsys->regs + addr);
> +               }
> +       }

mtk_mmsys_ddp_mout_en() could write register inside it rather than
return value and write register in mtk_mmsys_ddp_connect(). So you
could do ovl_mout_en() in mtk_mmsys_ddp_mout_en().

Regards,
Chun-Kuang.

>  }
>  EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_connect);
>
> @@ -99,6 +110,15 @@ void mtk_mmsys_ddp_disconnect(struct device *dev,
>                 reg = readl_relaxed(mmsys->regs + addr) & ~value;
>                 writel_relaxed(reg, mmsys->regs + addr);
>         }
> +
> +       if (!funcs->ovl_mout_en)
> +               return;
> +
> +       value = funcs->ovl_mout_en(cur, next, &addr);
> +       if (value) {
> +               reg = readl_relaxed(mmsys->regs + addr) & ~value;
> +               writel_relaxed(reg, mmsys->regs + addr);
> +       }
>  }
>  EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_disconnect);
>
> diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
> index aa4f60e..220203d 100644
> --- a/include/linux/soc/mediatek/mtk-mmsys.h
> +++ b/include/linux/soc/mediatek/mtk-mmsys.h
> @@ -49,6 +49,9 @@ struct mtk_mmsys_conn_funcs {
>         u32 (*mout_en)(enum mtk_ddp_comp_id cur,
>                        enum mtk_ddp_comp_id next,
>                        unsigned int *addr);
> +       u32 (*ovl_mout_en)(enum mtk_ddp_comp_id cur,
> +                          enum mtk_ddp_comp_id next,
> +                          unsigned int *addr);
>         u32 (*sel_in)(enum mtk_ddp_comp_id cur,
>                       enum mtk_ddp_comp_id next,
>                       unsigned int *addr);
> --
> 1.8.1.1.dirty
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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