linux-kernel - Re: [linux-sunxi] [PATCH 1/2] ARM: sun8i: v3s: add device nodes for DE2 display pipeline

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Message-ID: <CAGb2v65bZ+VJYwcP24ipQ+4kuY28Babt-Cpm7uscjmWpcoeJ9g@mail.gmail.com>
Date:   Thu, 25 May 2017 16:37:31 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [linux-sunxi] [PATCH 1/2] ARM: sun8i: v3s: add device nodes for
 DE2 display pipeline

On Wed, May 24, 2017 at 7:17 PM, Icenowy Zheng <icenowy@...c.io> wrote:
> Allwinner V3s SoC features a "Display Engine 2.0" with only one mixer
> and only one TCON connected to this mixer, which have RGB LCD output.
>
> Add device nodes for this display pipeline.
>
> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> ---
>  arch/arm/boot/dts/sun8i-v3s.dtsi | 83 ++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 83 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi b/arch/arm/boot/dts/sun8i-v3s.dtsi
> index a49ebef53c91..3a06dc5b3746 100644
> --- a/arch/arm/boot/dts/sun8i-v3s.dtsi
> +++ b/arch/arm/boot/dts/sun8i-v3s.dtsi
> @@ -61,6 +61,12 @@
>                 };
>         };
>
> +       de: display-engine {
> +               compatible = "allwinner,sun8i-v3s-display-engine";
> +               allwinner,pipelines = <&mixer0>;
> +               status = "disabled";
> +       };
> +
>         timer {
>                 compatible = "arm,armv7-timer";
>                 interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> @@ -95,6 +101,83 @@
>                 #size-cells = <1>;
>                 ranges;
>
> +               display_clocks: clock@...0000 {
> +                       compatible = "allwinner,sun8i-v3s-de2-clk";
> +                       reg = <0x01000000 0x100000>;
> +                       clocks = <&ccu CLK_DE>,
> +                                <&ccu CLK_BUS_DE>;
> +                       clock-names = "mod",
> +                                     "bus";
> +                       resets = <&ccu RST_BUS_DE>;
> +                       #clock-cells = <1>;
> +                       #reset-cells = <1>;
> +               };
> +
> +               mixer0: mixer@...0000 {

Since there's only one, can you drop the numbering suffix?
Same with the TCON.

> +                       compatible = "allwinner,sun8i-v3s-de2-mixer";
> +                       reg = <0x01100000 0x100000>;

The display engine also has an interrupt. Please list it.

ChenYu