Re: [PATCH v6 6/8] MIPS: DTS: CI20: Add DT nodes for HDMI setup

[Paul Cercueil <paul@crapouillou.net>]

Hi Nikolaus, Thomas,

Le mer., nov. 10 2021 at 20:43:31 +0100, H. Nikolaus Schaller 
<hns@goldelico.com> a écrit :
> From: Paul Boddie <paul@boddie.org.uk>
> 
> We need to hook up
> * HDMI connector
> * HDMI power regulator
> * JZ4780_CLK_HDMI @ 27 MHz
> * DDC pinmux
> * HDMI and LCDC endpoint connections
> 
> Signed-off-by: Paul Boddie <paul@boddie.org.uk>
> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
> ---
>  arch/mips/boot/dts/ingenic/ci20.dts | 73 
> +++++++++++++++++++++++++++--
>  1 file changed, 70 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/mips/boot/dts/ingenic/ci20.dts 
> b/arch/mips/boot/dts/ingenic/ci20.dts
> index a688809beebca..a62557bede565 100644
> --- a/arch/mips/boot/dts/ingenic/ci20.dts
> +++ b/arch/mips/boot/dts/ingenic/ci20.dts
> @@ -78,6 +78,18 @@ eth0_power: fixedregulator@0 {
>  		enable-active-high;
>  	};
> 
> +	hdmi_out: connector {
> +		compatible = "hdmi-connector";
> +		label = "HDMI OUT";
> +		type = "a";
> +
> +		port {
> +			hdmi_con: endpoint {
> +				remote-endpoint = <&dw_hdmi_out>;
> +			};
> +		};
> +	};
> +
>  	ir: ir {
>  		compatible = "gpio-ir-receiver";
>  		gpios = <&gpe 3 GPIO_ACTIVE_LOW>;
> @@ -102,6 +114,17 @@ otg_power: fixedregulator@2 {
>  		gpio = <&gpf 14 GPIO_ACTIVE_LOW>;
>  		enable-active-high;
>  	};
> +
> +	hdmi_power: fixedregulator@3 {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "hdmi_power";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +
> +		gpio = <&gpa 25 GPIO_ACTIVE_LOW>;

Just use 0 instead of GPIO_ACTIVE_LOW, since the flag is simply ignored 
(I know the other regulators do use it, but I'll clean that up soon).

> +		enable-active-high;
> +	};
>  };
> 
>  &ext {
> @@ -113,9 +136,9 @@ &cgu {
>  	 * Use the 32.768 kHz oscillator as the parent of the RTC for a 
> higher
>  	 * precision.
>  	 */
> -	assigned-clocks = <&cgu JZ4780_CLK_OTGPHY>, <&cgu JZ4780_CLK_RTC>;
> -	assigned-clock-parents = <0>, <&cgu JZ4780_CLK_RTCLK>;
> -	assigned-clock-rates = <48000000>;
> +	assigned-clocks = <&cgu JZ4780_CLK_OTGPHY>, <&cgu JZ4780_CLK_RTC>, 
> <&cgu JZ4780_CLK_HDMI>;
> +	assigned-clock-parents = <0>, <&cgu JZ4780_CLK_RTCLK>, <0>;
> +	assigned-clock-rates = <48000000>, <0>, <27000000>;

So drm-misc-next is based on a slightly older version (not v5.16-rc1 
yet), and these lines changed in linux master.

I think it would make sense to merge the DT changes (+ doc) into the 
MIPS tree, and the driver changes into drm-misc-next.

@Thomas: Is that OK for you?

Cheers,
-Paul

>  };
> 
>  &tcu {
> @@ -506,6 +529,12 @@ pins_i2c4: i2c4 {
>  		bias-disable;
>  	};
> 
> +	pins_hdmi_ddc: hdmi_ddc {
> +		function = "hdmi-ddc";
> +		groups = "hdmi-ddc";
> +		bias-disable;
> +	};
> +
>  	pins_nemc: nemc {
>  		function = "nemc";
>  		groups = "nemc-data", "nemc-cle-ale", "nemc-rd-we", "nemc-frd-fwe";
> @@ -536,3 +565,41 @@ pins_mmc1: mmc1 {
>  		bias-disable;
>  	};
>  };
> +
> +&hdmi {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pins_hdmi_ddc>;
> +
> +	hdmi-5v-supply = <&hdmi_power>;
> +
> +	ports {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		port@0 {
> +			reg = <0>;
> +			dw_hdmi_in: endpoint {
> +				remote-endpoint = <&lcd_out>;
> +			};
> +		};
> +
> +		port@1 {
> +			reg = <1>;
> +			dw_hdmi_out: endpoint {
> +				remote-endpoint = <&hdmi_con>;
> +			};
> +		};
> +	};
> +};
> +
> +&lcdc0 {
> +	status = "okay";
> +
> +	port {
> +		lcd_out: endpoint {
> +			remote-endpoint = <&dw_hdmi_in>;
> +		};
> +	};
> +};
> --
> 2.33.0
>