From: CK Hu <ck.hu@mediatek.com>
To: Jitao Shi <jitao.shi@mediatek.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, David Airlie <airlied@linux.ie>,
stonea168@163.com, dri-devel@lists.freedesktop.org,
yingjoe.chen@mediatek.com, Ajay Kumar <ajaykumar.rs@samsung.com>,
Vincent Palatin <vpalatin@chromium.org>,
cawa.cheng@mediatek.com, bibby.hsieh@mediatek.com,
Russell King <rmk+kernel@arm.linux.org.uk>,
Thierry Reding <treding@nvidia.com>,
linux-pwm@vger.kernel.org, Sascha Hauer <kernel@pengutronix.de>,
Pawel Moll <pawel.moll@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Inki Dae <inki.dae@samsung.com>, Rob Herring <robh+dt@kernel.org>,
linux-mediatek@lists.infradead.org,
Andy Yan <andy.yan@rock-chips.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
eddie.huang@mediatek.com, linux-arm-kernel@lists.infradead.org,
Rahul Sharma <rahul.sharma@samsung.com>,
srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org,
Philipp Zabel <p.zabel@pengutronix.de>,
Sean Paul <seanpaul@chromium.org>
Subject: Re: [PATCH v5 3/4] drm/mediatek: add mt8183 dpi clock factor
Date: Thu, 8 Aug 2019 15:14:35 +0800 [thread overview]
Message-ID: <1565248475.31636.0.camel@mtksdaap41> (raw)
In-Reply-To: <20190807060257.57007-4-jitao.shi@mediatek.com>
Hi, Jitao:
On Wed, 2019-08-07 at 14:02 +0800, Jitao Shi wrote:
> The factor depends on the divider of DPI in MT8183, therefore,
> we should fix this factor to the right and new one.
>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 743230864ba0..4f2700cbfdb7 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -672,6 +672,16 @@ static unsigned int mt2701_calculate_factor(int clock)
> return 1;
> }
>
> +static unsigned int mt8183_calculate_factor(int clock)
> +{
> + if (clock <= 27000)
> + return 8;
> + else if (clock <= 167000)
> + return 4;
> + else
> + return 2;
> +}
> +
> static const struct mtk_dpi_conf mt8173_conf = {
> .cal_factor = mt8173_calculate_factor,
> .reg_h_fre_con = 0xe0,
> @@ -683,6 +693,11 @@ static const struct mtk_dpi_conf mt2701_conf = {
> .edge_sel_en = true,
> };
>
> +static const struct mtk_dpi_conf mt8183_conf = {
> + .cal_factor = mt8183_calculate_factor,
> + .reg_h_fre_con = 0xe0,
> +};
> +
> static int mtk_dpi_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -779,6 +794,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
> { .compatible = "mediatek,mt8173-dpi",
> .data = &mt8173_conf,
> },
> + { .compatible = "mediatek,mt8183-dpi",
> + .data = &mt8183_conf,
> + },
> { },
> };
>
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next prev parent reply other threads:[~2019-08-08 7:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-07 6:02 [PATCH v5 0/4] add mt8183 dpi driver Jitao Shi
2019-08-07 6:02 ` [PATCH v5 1/4] dt-bindings: display: mediatek: update dpi supported chips Jitao Shi
2019-08-12 21:49 ` Rob Herring
2019-08-12 21:51 ` Rob Herring
2019-08-07 6:02 ` [PATCH v5 2/4] drm/mediatek: dpi dual edge support Jitao Shi
2019-08-07 6:02 ` [PATCH v5 3/4] drm/mediatek: add mt8183 dpi clock factor Jitao Shi
2019-08-08 7:14 ` CK Hu [this message]
2019-08-07 6:02 ` [PATCH v5 4/4] drm/mediatek: control dpi pins dpi or gpio mode in on or off Jitao Shi
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