linux-kernel - Re: [linux-sunxi] [PATCH 14/15] ARM: sun5i: a10s: Add the HDMI controller node

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Message-ID: <CAGb2v674TKUho1tsq6KSyWS_=+dn_8CFuM31uxR7akZSXAjeHA@mail.gmail.com>
Date:   Thu, 9 Mar 2017 19:10:37 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH 14/15] ARM: sun5i: a10s: Add the HDMI
 controller node

On Thu, Mar 9, 2017 at 6:59 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> 1;4601;0c
> On Wed, Mar 08, 2017 at 11:35:39AM +0800, Chen-Yu Tsai wrote:
>> Hi,
>>
>> On Tue, Mar 7, 2017 at 4:56 PM, Maxime Ripard
>> <maxime.ripard@...e-electrons.com> wrote:
>> > The A10s has an HDMI controller connected to the second TCON channel. Add
>> > it to our DT.
>> >
>> > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
>> > ---
>> >  arch/arm/boot/dts/sun5i-a10s.dtsi | 34 ++++++++++++++++++++++++++++++++-
>> >  arch/arm/boot/dts/sun5i.dtsi      |  1 +-
>> >  2 files changed, 35 insertions(+), 0 deletions(-)
>> >
>> > diff --git a/arch/arm/boot/dts/sun5i-a10s.dtsi b/arch/arm/boot/dts/sun5i-a10s.dtsi
>> > index 074485782a4a..3482c9d2b120 100644
>> > --- a/arch/arm/boot/dts/sun5i-a10s.dtsi
>> > +++ b/arch/arm/boot/dts/sun5i-a10s.dtsi
>> > @@ -72,7 +72,33 @@
>> >                 };
>> >         };
>> >
>> > +       display-engine {
>> > +               compatible = "allwinner,sun5i-a10s-display-engine",
>> > +                            "allwinner,sun5i-a13-display-engine";
>> > +               allwinner,pipelines = <&fe0>;
>> > +       };
>> > +
>> >         soc@...00000 {
>> > +               hdmi0: hdmi@...16000 {
>>
>> Nit: is the 0 suffix needed? I don't see any indication that there is
>> a second controller.
>>
>> > +                       compatible = "allwinner,sun5i-a10s-hdmi";
>> > +                       reg = <0x01c16000 0x1000>;
>> > +                       clocks = <&ccu CLK_AHB_HDMI>, <&ccu CLK_HDMI>,
>> > +                                <&ccu CLK_PLL_VIDEO0_2X>,
>> > +                                <&ccu CLK_PLL_VIDEO1_2X>;
>> > +                       clock-names = "ahb", "mod", "pll-0", "pll-1";
>> > +                       status = "disabled";
>> > +
>> > +                       port {
>> > +                               #address-cells = <1>;
>> > +                               #size-cells = <0>;
>> > +
>> > +                               hdmi0_in_tcon0: endpoint@0 {
>> > +                                       reg = <0>;
>> > +                                       remote-endpoint = <&tcon0_out_hdmi0>;
>> > +                               };
>> > +                       };
>> > +               };
>> > +
>> >                 pwm: pwm@...20e00 {
>> >                         compatible = "allwinner,sun5i-a10s-pwm";
>> >                         reg = <0x01c20e00 0xc>;
>> > @@ -129,3 +155,11 @@
>> >
>> >  &sram_a {
>> >  };
>> > +
>> > +&tcon0_out {
>> > +       tcon0_out_hdmi0: endpoint@2 {
>> > +               reg = <2>;
>> > +               remote-endpoint = <&hdmi0_in_tcon0>;
>> > +               allwinner,tcon-channel = <1>;
>> > +       };
>> > +};
>> > diff --git a/arch/arm/boot/dts/sun5i.dtsi b/arch/arm/boot/dts/sun5i.dtsi
>> > index f3b6e19244f9..3d009b2aa42a 100644
>> > --- a/arch/arm/boot/dts/sun5i.dtsi
>> > +++ b/arch/arm/boot/dts/sun5i.dtsi
>> > @@ -273,6 +273,7 @@
>> >                                         tcon0_out_tve0: endpoint@1 {
>> >                                                 reg = <1>;
>> >                                                 remote-endpoint = <&tve0_in_tcon0>;
>> > +                                               allwinner,tcon-channel = <1>;
>>
>> This looks like a separate patch, probably following the binding
>> change?
>
> I don't know, the binding says that without anything specified, reg
> would be used. I was assuming that we only needed it once we had the
> new endpoint to make it consistent, therefore it didn't need an extra
> patch.
>
> But I can definitely create one if you want.

It just seems a bit out of place, that's all. Mentioning it in the
commit message would be good enough for me.

ChenYu

> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com