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Date: Tue, 17 Oct 2017 18:48:20 +0800
From: Chen-Yu Tsai <wens@...e.org>
To: Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc: Daniel Vetter <daniel.vetter@...el.com>,
David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Mark Rutland <mark.rutland@....com>,
Rob Herring <robh+dt@...nel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-clk <linux-clk@...r.kernel.org>,
Priit Laes <plaes@...es.org>, Icenowy Zheng <icenowy@...c.io>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
Quentin Schulz <quentin.schulz@...e-electrons.com>,
Mylene Josserand <mylene.josserand@...e-electrons.com>
Subject: Re: [PATCH 17/23] arm: dts: sun8i: a83t: Add display pipeline
On Tue, Oct 17, 2017 at 5:06 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> The display pipeline on the A83T is mainly composed of the mixers and
> TCONs, plus various encoders.
>
> Let's add the mixers and TCONs to the DTSI.
You are only adding half of them, i.e. only the first pipeline.
Please mention why.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> ---
> arch/arm/boot/dts/sun8i-a83t.dtsi | 80 ++++++++++++++++++++++++++++++++-
> 1 file changed, 80 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
> index ce6e887c8938..57feeb6fee8b 100644
> --- a/arch/arm/boot/dts/sun8i-a83t.dtsi
> +++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
> @@ -151,6 +151,12 @@
> };
> };
>
> + de: display-engine {
> + compatible = "allwinner,sun8i-a83t-display-engine";
> + allwinner,pipelines = <&mixer0>;
> + status = "disabled";
> + };
> +
> memory {
> reg = <0x40000000 0x80000000>;
> device_type = "memory";
> @@ -162,6 +168,46 @@
> #size-cells = <1>;
> ranges;
>
> + display_clocks: clock@...0000 {
> + compatible = "allwinner,sun8i-a83t-de2-clk";
> + reg = <0x01000000 0x100000>;
> + clocks = <&ccu CLK_PLL_DE>,
> + <&ccu CLK_BUS_DE>;
> + clock-names = "mod",
> + "bus";
> + resets = <&ccu RST_BUS_DE>;
> + #clock-cells = <1>;
> + #reset-cells = <1>;
> + };
> +
> + mixer0: mixer@...0000 {
> + compatible = "allwinner,sun8i-a83t-de2-mixer";
> + reg = <0x01100000 0x100000>;
> + clocks = <&display_clocks 0>,
> + <&display_clocks 6>;
> + clock-names = "bus",
> + "mod";
> + resets = <&display_clocks 0>;
> + assigned-clocks = <&display_clocks 6>;
You can use the header file macros now.
> + assigned-clock-rates = <150000000>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + mixer0_out: port@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <1>;
> +
> + mixer0_out_tcon0: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&tcon0_in_mixer0>;
> + };
> + };
> + };
> + };
> +
> syscon: syscon@...0000 {
> compatible = "allwinner,sun8i-a83t-system-controller",
> "syscon";
> @@ -177,6 +223,40 @@
> #dma-cells = <1>;
> };
>
> + tcon0: lcd-controller@...c000 {
> + compatible = "allwinner,sun8i-a83t-tcon";
> + reg = <0x01c0c000 0x1000>;
> + interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&ccu CLK_BUS_TCON0>, <&ccu CLK_TCON0>;
> + clock-names = "ahb", "tcon-ch0";
So I spotted that LVDS can use either TCON0 or MIPI-PLL as its clock parent.
See register TCON0_LVDS_IF_REG @ 0x084. Any chance this makes it into the
binding and device trees?
> + clock-output-names = "tcon-pixel-clock";
> + resets = <&ccu RST_BUS_TCON0>, <&ccu RST_BUS_LVDS>;
> + reset-names = "lcd", "lvds";
> + status = "disabled";
Any reason not to have this enabled by default?
ChenYu
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + tcon0_in: port@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0>;
> +
> + tcon0_in_mixer0: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&mixer0_out_tcon0>;
> + };
> + };
> +
> + tcon0_out: port@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <1>;
> + };
> + };
> + };
> +
> mmc0: mmc@...f000 {
> compatible = "allwinner,sun8i-a83t-mmc",
> "allwinner,sun7i-a20-mmc";
> --
> git-series 0.9.1
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