linux-kernel - Re: [PATCH v28 05/11] soc: mediatek: refine code to use mtk_mmsys_update

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Date:   Tue, 27 Dec 2022 07:54:15 +0000
From:   Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>
To:     "wenst@...omium.org" <wenst@...omium.org>
CC:     "llvm@...ts.linux.dev" <llvm@...ts.linux.dev>,
        Yongqiang Niu (牛永强) 
        <yongqiang.niu@...iatek.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        Singo Chang (張興國) 
        <Singo.Chang@...iatek.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "nathan@...nel.org" <nathan@...nel.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
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        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
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Subject: Re: [PATCH v28 05/11] soc: mediatek: refine code to use
 mtk_mmsys_update_bits API

Dear Chen-Yu,

Sorry for late response and thanks for the review.

On Thu, 2022-12-01 at 19:44 +0800, Chen-Yu Tsai wrote:
> On Mon, Nov 7, 2022 at 3:23 PM Nancy.Lin <nancy.lin@...iatek.com>
> wrote:
> > 
> > Simplify code for update  mmsys reg.
> > 
> > Signed-off-by: Nancy.Lin <nancy.lin@...iatek.com>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@...labora.com>
> > Reviewed-by: CK Hu <ck.hu@...iatek.com>
> > Tested-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@...labora.com>
> > Tested-by: Bo-Chen Chen <rex-bc.chen@...iatek.com>
> > Reviewed-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
> > ---
> >  drivers/soc/mediatek/mtk-mmsys.c | 45 ++++++++++++--------------
> > ------
> >  1 file changed, 16 insertions(+), 29 deletions(-)
> > 
> > diff --git a/drivers/soc/mediatek/mtk-mmsys.c
> > b/drivers/soc/mediatek/mtk-mmsys.c
> > index 9a327eb5d9d7..73c8bd27e6ae 100644
> > --- a/drivers/soc/mediatek/mtk-mmsys.c
> > +++ b/drivers/soc/mediatek/mtk-mmsys.c
> 
> [...]
> 
> > @@ -124,27 +129,14 @@ void mtk_mmsys_ddp_disconnect(struct device
> > *dev,
> >  {
> >         struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
> >         const struct mtk_mmsys_routes *routes = mmsys->data-
> > >routes;
> > -       u32 reg;
> >         int i;
> > 
> >         for (i = 0; i < mmsys->data->num_routes; i++)
> > -               if (cur == routes[i].from_comp && next ==
> > routes[i].to_comp) {
> > -                       reg = readl_relaxed(mmsys->regs +
> > routes[i].addr);
> > -                       reg &= ~routes[i].mask;
> > -                       writel_relaxed(reg, mmsys->regs +
> > routes[i].addr);
> > -               }
> > +               if (cur == routes[i].from_comp && next ==
> > routes[i].to_comp)
> > +                       mtk_mmsys_update_bits(mmsys,
> > routes[i].addr, routes[i].mask, 0);
> >  }
> >  EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_disconnect);
> > 
> > -static void mtk_mmsys_update_bits(struct mtk_mmsys *mmsys, u32
> > offset, u32 mask, u32 val)
> > -{
> > -       u32 tmp;
> > -
> > -       tmp = readl_relaxed(mmsys->regs + offset);
> > -       tmp = (tmp & ~mask) | val;
> > -       writel_relaxed(tmp, mmsys->regs + offset);
> > -}
> > -
> >  void mtk_mmsys_ddp_dpi_fmt_config(struct device *dev, u32 val)
> >  {
> >         if (val)
> 
> This hunk now doesn't apply due to
> 
>     soc: mediatek: Add all settings to mtk_mmsys_ddp_dpi_fmt_config
> func
> 
> touching mtk_mmsys_ddp_dpi_fmt_config() as well. It's trivial to
> resolve
> though.
> 
> ChenYu

I will update next revision base on next-20221226 which include the
patch you mentioned.

Regards,
Nancy