linux-kernel - Re: [PATCH] drm/mediatek: remove unnecessary conversion to bool

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Date:   Mon, 15 Jun 2020 22:00:52 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Bernard Zhao <bernard@...o.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        opensource.kernel@...o.com
Subject: Re: [PATCH] drm/mediatek: remove unnecessary conversion to bool

Joe Perches <joe@...ches.com> 於 2020年6月15日 週一 上午4:41寫道：
>
> On Fri, 2020-06-12 at 20:40 +0800, Bernard Zhao wrote:
> > In function mtk_dsi_clk_hs_state, remove unnecessary conversion
> > to bool return, this change is to make the code a bit readable.
> []
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> []
> > @@ -319,7 +319,7 @@ static bool mtk_dsi_clk_hs_state(struct mtk_dsi *dsi)
> >       u32 tmp_reg1;
> >
> >       tmp_reg1 = readl(dsi->regs + DSI_PHY_LCCON);
> > -     return ((tmp_reg1 & LC_HS_TX_EN) == 1) ? true : false;
> > +     return ((tmp_reg1 & LC_HS_TX_EN) == 1);
>
> Given:
>
> drivers/gpu/drm/mediatek/mtk_dsi.c:#define LC_HS_TX_EN                  BIT(0)
>
> This is likely clearer as
>
>         return tmp_reg1 & LC_HS_TX_EN;
>
> or even
>
> static bool mtk_dsi_clk_hs_state(struct mtk_dsi *dsi)
> {
>         return readl(dsi->regs + DSI_PHY_LCCON) & LC_HS_TX_EN;
> }

I like the second one.

>
>
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