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Message-ID: <1557214528.3498.3.camel@mtksdaap41>
Date: Tue, 7 May 2019 15:35:28 +0800
From: CK Hu <ck.hu@...iatek.com>
To: Jitao Shi <jitao.shi@...iatek.com>
CC: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
"Mark Rutland" <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>, <linux-pwm@...r.kernel.org>,
David Airlie <airlied@...ux.ie>,
"Matthias Brugger" <matthias.bgg@...il.com>,
Thierry Reding <treding@...dia.com>,
"Ajay Kumar" <ajaykumar.rs@...sung.com>,
Inki Dae <inki.dae@...sung.com>,
"Rahul Sharma" <rahul.sharma@...sung.com>,
Sean Paul <seanpaul@...omium.org>,
Vincent Palatin <vpalatin@...omium.org>,
Andy Yan <andy.yan@...k-chips.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
"Russell King" <rmk+kernel@....linux.org.uk>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<dri-devel@...ts.freedesktop.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<srv_heupstream@...iatek.com>,
Sascha Hauer <kernel@...gutronix.de>,
<yingjoe.chen@...iatek.com>, <eddie.huang@...iatek.com>,
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Subject: Re: [v3 2/3] drm/mediatek: dpi dual edge support
Hi, Jitao:
On Tue, 2019-04-16 at 13:52 +0800, Jitao Shi wrote:
Where is the commit message? I think you could introduce what is dual
edge (Maybe it's trivial for you, but not for me)
Regards,
CK
> Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 22e68a100e7b..66405159141a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -117,6 +117,7 @@ struct mtk_dpi_conf {
> unsigned int (*cal_factor)(int clock);
> u32 reg_h_fre_con;
> bool edge_sel_en;
> + bool dual_edge;
> };
>
> static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
> @@ -353,6 +354,13 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
> mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
> }
>
> +static void mtk_dpi_enable_dual_edge(struct mtk_dpi *dpi)
> +{
> + mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE,
> + DDR_EN | DDR_4PHASE);
> + mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, EDGE_SEL, EDGE_SEL);
> +}
> +
> static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> enum mtk_dpi_out_color_format format)
> {
> @@ -509,6 +517,8 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> mtk_dpi_config_color_format(dpi, dpi->color_format);
> mtk_dpi_config_2n_h_fre(dpi);
> mtk_dpi_config_disable_edge(dpi);
> + if (dpi->conf->dual_edge)
> + mtk_dpi_enable_dual_edge(dpi);
> mtk_dpi_sw_reset(dpi, false);
>
> return 0;
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