Re: [PATCH v6 1/4] dt-bindings: display: mediatek: update dpi supported chips

[CK Hu <ck.hu@mediatek.com>]

Hi, Jitao:

On Fri, 2020-02-21 at 19:28 +0800, Jitao Shi wrote:
> Add decriptions about supported chips, including MT2701 & MT8173 &
> mt8183
> 
> 1. Add more chips support. ex. MT2701 & MT8173 & MT8183
> 2. Add property "dpi_pin_mode_swap" and "pinctrl-names" gpio mode dpi mode and
>    gpio oupput-low to avoid leakage current.
> 3. Add property "dpi_dual_edge" to config the dpi pin output mode dual edge or
>    single edge sample data.
> 
> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> ---
>  .../bindings/display/mediatek/mediatek,dpi.txt        | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
> index b6a7e7397b8b..cd6a1469c8b7 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
> @@ -7,6 +7,7 @@ output bus.
>  
>  Required properties:
>  - compatible: "mediatek,<chip>-dpi"
> +  the supported chips are mt2701 , mt8173 and mt8183.
>  - reg: Physical base address and length of the controller's registers
>  - interrupts: The interrupt signal from the function block.
>  - clocks: device clocks
> @@ -16,6 +17,11 @@ Required properties:
>    Documentation/devicetree/bindings/graph.txt. This port should be connected
>    to the input port of an attached HDMI or LVDS encoder chip.
>  
> +Optional properties:
> +- dpi_pin_mode_swap: Swap the pin mode between dpi mode and gpio mode.

When you have both pinctrl-name of "gpiomode" and "dpimode", it imply
that dpi_pin_mode_swap = true, isn't it? If so, I think this property is
redundant.

Regards,
CK

> +- pinctrl-names: Contain "gpiomode" and "dpimode".
> +- dpi_dual_edge: Control the RGB 24bit data on 12 pins or 24 pins.
> +
>  Example:
>  
>  dpi0: dpi@1401d000 {
> @@ -26,6 +32,11 @@ dpi0: dpi@1401d000 {
>  		 <&mmsys CLK_MM_DPI_ENGINE>,
>  		 <&apmixedsys CLK_APMIXED_TVDPLL>;
>  	clock-names = "pixel", "engine", "pll";
> +	dpi_dual_edge;
> +	dpi_pin_mode_swap;
> +	pinctrl-names = "gpiomode", "dpimode";
> +	pinctrl-0 = <&dpi_pin_gpio>;
> +	pinctrl-1 = <&dpi_pin_func>;
>  
>  	port {
>  		dpi0_out: endpoint {