linux-kernel - Re: [PATCH 13/27] drm/sun4i: Add support for H6 DE3 mixer 0

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Message-ID: <CAGb2v65LzGgXORTx7PR+udZsrgGgmnXeaOW-jb=KMjHjTg7bRg@mail.gmail.com>
Date:   Sat, 22 Sep 2018 21:47:03 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Jernej Skrabec <jernej.skrabec@...l.net>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Mark Rutland <mark.rutland@....com>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH 13/27] drm/sun4i: Add support for H6 DE3 mixer 0

On Sat, Sep 22, 2018 at 9:23 PM Chen-Yu Tsai <wens@...e.org> wrote:
>
> On Sun, Sep 2, 2018 at 3:27 PM Jernej Skrabec <jernej.skrabec@...l.net> wrote:
> >
> > Mixer 0 has 1 VI and 3 UI planes, scaler on all planes and can output
> > 4K image @60Hz. It also support 10 bit colors.
>
> AFAICT 10 bit color support is not implemented? Please mention this.
>
> >
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
> > ---
> >  drivers/gpu/drm/sun4i/sun8i_mixer.c | 13 +++++++++++++
> >  1 file changed, 13 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > index a9218abf0935..54eca2dd4b33 100644
> > --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > @@ -540,6 +540,15 @@ static int sun8i_mixer_remove(struct platform_device *pdev)
> >         return 0;
> >  }
> >
> > +static const struct sun8i_mixer_cfg sun50i_h6_mixer0_cfg = {
>
> Please sort the per-compatible structures according to "version sort" rules.
>
> > +       .ccsc           = 0,
> > +       .is_de3         = true,
> > +       .mod_rate       = 600000000,
> > +       .scaler_mask    = 0xf,
> > +       .ui_num         = 3,
> > +       .vi_num         = 1,
> > +};
> > +
> >  static const struct sun8i_mixer_cfg sun8i_a83t_mixer0_cfg = {
> >         .ccsc           = 0,
> >         .scaler_mask    = 0xf,
> > @@ -587,6 +596,10 @@ static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
> >  };
> >
> >  static const struct of_device_id sun8i_mixer_of_table[] = {
> > +       {
> > +               .compatible = "allwinner,sun50i-h6-de3-mixer-0",
> > +               .data = &sun50i_h6_mixer0_cfg,
> > +       },
>
> Same here.
>
> ChenYu

BTW, DE 3.0 includes a register in DE TOP called "DE IP configure register",
which gives the number of IP blocks per class, per mixer. If we retrieve the
configuration from this register, then we shouldn't need to differentiate
between mixer-0 and mixer-1 with compatible strings.

What do you think?

ChenYu