linux-kernel - Re: [PATCH 19/21] drm/mediatek: dpi: add support for dpi clock

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Date:   Wed, 15 Mar 2023 22:17:11 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Alexandre Mergnat <amergnat@...libre.com>
Cc:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Daniel Vetter <daniel@...ll.ch>, CK Hu <ck.hu@...iatek.com>,
        Jitao Shi <jitao.shi@...iatek.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sam Ravnborg <sam@...nborg.org>,
        Rob Herring <robh+dt@...nel.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        David Airlie <airlied@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Xinlei Lee <xinlei.lee@...iatek.com>,
        Guillaume La Roque <glaroque@...libre.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org,
        Fabien Parent <fparent@...libre.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 19/21] drm/mediatek: dpi: add support for dpi clock

Hi, Alexandre:

Alexandre Mergnat <amergnat@...libre.com> 於 2023年3月15日 週三 下午5:36寫道：
>
> Le lun. 13 mars 2023 à 16:21, Chun-Kuang Hu <chunkuang.hu@...nel.org> a écrit :
> >
> > >
> > > +       dpi->dpi_clk = devm_clk_get_optional(dev, "dpi");
> >
> > For MT8365, DPI clock is not optional, so make sure that MT8365 DPI
> > should have this clock.
>
> This should be check and notified at build time thanks to the
> device-tree binding. Do you prefer this?:
> #IF MT8365_SOC
>     dpi->dpi_clk = devm_clk_get(dev, "dpi");

Add one member in struct mtk_dpi_conf for dpi_clk. In
mtk_dpi_of_ids[], add one item for mt8365

{ .compatible = "mediatek,mt8365-dpi",
 .data = &mt8365_conf,
},

Regards,
Chun-Kuang.

>
> Regards,
> Alex