[PATCH] arm64: dts: imx8mp: Add TC9595 bridge on DH electronics i.MX8M Plus DHCOM

[Alexander Stein]

Hello Marek,

Am Montag, 15. Mai 2023, 18:24:24 CEST schrieb Marek Vasut:
> Add TC9595 DSI-to-DPI and DSI-to-(e)DP bridge to
> DH electronics i.MX8M Plus DHCOM SoM . The bridge
> is populated on the SoM, but disabled by default
> unless used for display output.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>

Were you actually able to access the display? E.g. reading DPCD via AUX 
channel?

Best regards,
Alexander

> ---
> Cc: Conor Dooley <conor+dt at kernel.org>
> Cc: Fabio Estevam <festevam at gmail.com>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
> Cc: NXP Linux Team <linux-imx at nxp.com>
> Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
> Cc: Rob Herring <robh+dt at kernel.org>
> Cc: Sascha Hauer <s.hauer at pengutronix.de>
> Cc: Shawn Guo <shawnguo at kernel.org>
> Cc: devicetree at vger.kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> ---
>  .../boot/dts/freescale/imx8mp-dhcom-som.dtsi  | 55 +++++++++++++++++++
>  1 file changed, 55 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
> b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi index
> 98a11c31d7d45..9c0cb75386e36 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
> @@ -240,6 +240,36 @@ &i2c3 {
>  	sda-gpios = <&gpio5 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
>  	status = "okay";
> 
> +	tc_bridge: bridge at f {
> +		compatible = "toshiba,tc9595", "toshiba,tc358767";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_tc9595>;
> +		reg = <0xf>;
> +		clock-names = "ref";
> +		clocks = <&clk IMX8MP_CLK_CLKOUT2>;
> +		assigned-clocks = <&clk IMX8MP_CLK_CLKOUT2_SEL>,
> +				  <&clk IMX8MP_CLK_CLKOUT2>,
> +				  <&clk IMX8MP_AUDIO_PLL2_OUT>;
> +		assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL2_OUT>;
> +		assigned-clock-rates = <13000000>, <13000000>, 
<156000000>;
> +		reset-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
> +		status = "disabled";
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port at 0 {
> +				reg = <0>;
> +
> +				tc_bridge_in: endpoint {
> +					data-lanes = <1 2 3 4>;
> +					remote-endpoint = 
<&dsi_out>;
> +				};
> +			};
> +		};
> +	};
> +
>  	pmic: pmic at 25 {
>  		compatible = "nxp,pca9450c";
>  		reg = <0x25>;
> @@ -406,6 +436,22 @@ &i2c5 {	/* HDMI EDID bus */
>  	status = "okay";
>  };
> 
> +&mipi_dsi {
> +	samsung,burst-clock-frequency = <160000000>;
> +	samsung,esc-clock-frequency = <10000000>;
> +
> +	ports {
> +		port at 1 {
> +			reg = <1>;
> +
> +			dsi_out: endpoint {
> +				data-lanes = <1 2 3 4>;
> +				remote-endpoint = <&tc_bridge_in>;
> +			};
> +		};
> +	};
> +};
> +
>  &pwm1 {
>  	pinctrl-0 = <&pinctrl_pwm1>;
>  	pinctrl-names = "default";
> @@ -880,6 +926,15 @@ MX8MP_IOMUXC_SAI3_TXD__AUDIOMIX_SAI3_TX_DATA00	0xd6
> 
>  		>;
> 
>  	};
> 
> +	pinctrl_tc9595: dhcom-tc9595-grp {
> +		fsl,pins = <
> +			/* RESET_DSIBRIDGE */
> +			MX8MP_IOMUXC_SAI1_RXC__GPIO4_IO01		
0x40000146
> +			/* DSI-CONV_INT Interrupt */
> +			MX8MP_IOMUXC_SAI5_RXD0__GPIO3_IO21		
0x141
> +		>;
> +	};
> +
>  	pinctrl_touch: dhcom-touch-grp {
>  		fsl,pins = <
>  			/* #TOUCH_INT */


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