From: Jitao Shi <jitao.shi@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>
Cc: jamesjj.liao@mediatek.com, Ryder Lee <ryder.lee@mediatek.com>,
bibby.hsieh@mediatek.com, srv_heupstream@mediatek.com,
chunhui dai <chunhui.dai@mediatek.com>,
Stephen Boyd <sboyd@kernel.org>,
--to=Michael Turquette <mturquette@baylibre.com>,
Sean Wang <sean.wang@mediatek.com>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
David Airlie <airlied@linux.ie>,
linux-mediatek@lists.infradead.org,
Philipp Zabel <p.zabel@pengutronix.de>,
CK Hu <ck.hu@mediatek.com>,
Colin Ian King <colin.king@canonical.com>,
linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 9/9] drm/mediatek: add dpi dual edge support
Date: Tue, 22 Jan 2019 15:03:18 +0800 [thread overview]
Message-ID: <1548140598.5648.1.camel@mszsdaap41> (raw)
In-Reply-To: <ae8eeb33-43cd-f4b8-a564-95eeecea7d31@gmail.com>
On Wed, 2019-01-09 at 17:58 +0100, Matthias Brugger wrote:
>
> On 04/01/2019 08:03, chunhui dai wrote:
> > DPI sample on rising and falling edge. It can reduce half data io.
> >
> > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> > Signed-off-by: chunhui dai <chunhui.dai@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_dpi.c | 30 ++++++++++++++++++++++++++++++
> > 1 file changed, 30 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > index 4a2f4a6..acb4f47 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 +354,15 @@ 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_config_dual_edge(struct mtk_dpi *dpi)
>
> I think it is clearer if you rename the function to something like:
> mtk_dpi_enable_dual_edge and call it in mtk_dpi_set_display_mode if
> dpi->conf->dual_edge is true.
>
> Regards,
> Matthias
>
I'll fix it in next patch.
Best Regards
Jitao
> > +{
> > + if (dpi->conf->dual_edge) {
> > + 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 +519,7 @@ 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);
> > + mtk_dpi_config_dual_edge(dpi);
> > mtk_dpi_sw_reset(dpi, false);
> >
> > return 0;
> > @@ -669,6 +680,16 @@ 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,
> > @@ -680,6 +701,12 @@ static unsigned int mt2701_calculate_factor(int clock)
> > .edge_sel_en = true,
> > };
> >
> > +static const struct mtk_dpi_conf mt8183_conf = {
> > + .cal_factor = mt8183_calculate_factor,
> > + .reg_h_fre_con = 0xe0,
> > + .dual_edge = true,
> > +};
> > +
> > static int mtk_dpi_probe(struct platform_device *pdev)
> > {
> > struct device *dev = &pdev->dev;
> > @@ -775,6 +802,9 @@ static int mtk_dpi_remove(struct platform_device *pdev)
> > { .compatible = "mediatek,mt8173-dpi",
> > .data = &mt8173_conf,
> > },
> > + { .compatible = "mediatek,mt8183-dpi",
> > + .data = &mt8183_conf,
> > + },
> > { },
> > };
> >
> >
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-01-22 7:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1546585439-30455-1-git-send-email-chunhui.dai@mediatek.com>
[not found] ` <1546585439-30455-5-git-send-email-chunhui.dai@mediatek.com>
2019-01-09 16:54 ` [PATCH 4/9] drm/mediatek: fix the rate and divder of hdmi phy for MT2701 Matthias Brugger
2019-01-17 8:34 ` Chunhui Dai
[not found] ` <1546585439-30455-2-git-send-email-chunhui.dai@mediatek.com>
2019-01-09 16:55 ` [PATCH 1/9] drm/mediatek: recalculate hdmi phy clock of MT2701 by querying hardware Matthias Brugger
2019-01-10 1:47 ` CK Hu
[not found] ` <1546585439-30455-10-git-send-email-chunhui.dai@mediatek.com>
2019-01-09 16:58 ` [PATCH 9/9] drm/mediatek: add dpi dual edge support Matthias Brugger
2019-01-22 7:03 ` Jitao Shi [this message]
[not found] ` <6021c8950c3146bb941ed1355391106d@mtkmbs01n1.mediatek.inc>
2019-01-22 6:41 ` Jitao Shi
[not found] ` <1546585439-30455-3-git-send-email-chunhui.dai@mediatek.com>
2019-01-10 8:28 ` [PATCH 2/9] drm/mediatek: move the setting of fixed divider CK Hu
2019-01-17 8:49 ` Chunhui Dai
[not found] ` <1546585439-30455-4-git-send-email-chunhui.dai@mediatek.com>
2019-01-16 6:37 ` [PATCH 3/9] drm/mediatek: using different flags of clk for HDMI phy CK Hu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1548140598.5648.1.camel@mszsdaap41 \
--to=jitao.shi@mediatek.com \
--cc=airlied@linux.ie \
--cc=bibby.hsieh@mediatek.com \
--cc=chunhui.dai@mediatek.com \
--cc=ck.hu@mediatek.com \
--cc=colin.king@canonical.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=jamesjj.liao@mediatek.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=matthias.bgg@gmail.com \
--cc=mturquette@baylibre.com \
--cc=p.zabel@pengutronix.de \
--cc=ryder.lee@mediatek.com \
--cc=sboyd@kernel.org \
--cc=sean.wang@mediatek.com \
--cc=srv_heupstream@mediatek.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).