[PATCH 04/10] ARM: dts: Augment VGA connector bridge on Realview PBX

[Liviu Dudau]

On Sun, Mar 11, 2018 at 02:53:01PM +0100, Linus Walleij wrote:
> The PL111 in the ARM reference platforms are connected to
> "panels" that are actually dumb VGA DAC connector bridges.
> Now that we can support the proper bridges in the DRM driver,
> fix this up.
> 
> Cc: Liviu Dudau <liviu.dudau at arm.com>
> Cc: Mali DP Maintainers <malidp at foss.arm.com>
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>

Reviewed-by: Liviu Dudau <liviu.dudau at arm.com>

> ---
>  arch/arm/boot/dts/arm-realview-pbx.dtsi | 82 ++++++++++++++++++++++-----------
>  1 file changed, 55 insertions(+), 27 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/arm-realview-pbx.dtsi b/arch/arm/boot/dts/arm-realview-pbx.dtsi
> index aeb49c4bd773..10868ba3277f 100644
> --- a/arch/arm/boot/dts/arm-realview-pbx.dtsi
> +++ b/arch/arm/boot/dts/arm-realview-pbx.dtsi
> @@ -34,7 +34,8 @@
>  		serial1 = &serial1;
>  		serial2 = &serial2;
>  		serial3 = &serial3;
> -		i2c0 = &i2c;
> +		i2c0 = &i2c0;
> +		i2c1 = &i2c1;
>  	};
>  
>  	memory {
> @@ -158,6 +159,49 @@
>  		port1-otg;
>  	};
>  
> +	bridge {
> +		compatible = "ti,ths8134a", "ti,ths8134";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port at 0 {
> +				reg = <0>;
> +
> +				vga_bridge_in: endpoint {
> +					remote-endpoint = <&clcd_pads>;
> +				};
> +			};
> +
> +			port at 1 {
> +				reg = <1>;
> +
> +				vga_bridge_out: endpoint {
> +					remote-endpoint = <&vga_con_in>;
> +				};
> +			};
> +		};
> +	};
> +
> +	vga {
> +		/*
> +		 * This DDC I2C is connected directly to the DVI portions
> +		 * of the connector, so it's not really working when the
> +		 * monitor is connected to the VGA connector.
> +		 */
> +		compatible = "vga-connector";
> +		ddc-i2c-bus = <&i2c1>;
> +
> +		port {
> +			vga_con_in: endpoint {
> +				remote-endpoint = <&vga_bridge_out>;
> +			};
> +		};
> +	};
> +
>  	soc: soc at 0 {
>  		compatible = "arm,realview-pbx-soc", "simple-bus";
>  		#address-cells = <1>;
> @@ -285,7 +329,7 @@
>  					       <&timclk>;
>  		};
>  
> -		i2c: i2c at 10002000 {
> +		i2c0: i2c at 10002000 {
>  			#address-cells = <1>;
>  			#size-cells = <0>;
>  			compatible = "arm,versatile-i2c";
> @@ -396,7 +440,12 @@
>  			clock-names = "apb_pclk";
>  		};
>  
> -		/* DVI serial bus control is at 10016000 */
> +		i2c1: i2c at 10016000 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			compatible = "arm,versatile-i2c";
> +			reg = <0x10016000 0x1000>;
> +		};
>  
>  		rtc: rtc at 10017000 {
>  			compatible = "arm,pl031", "arm,primecell";
> @@ -506,36 +555,15 @@
>  			interrupt-names = "combined";
>  			clocks = <&oscclk4>, <&pclk>;
>  			clock-names = "clcdclk", "apb_pclk";
> +			/* 1024x768 16bpp @65MHz works fine */
> +			max-memory-bandwidth = <95000000>;
>  
>  			port {
>  				clcd_pads: endpoint {
> -					remote-endpoint = <&clcd_panel>;
> +					remote-endpoint = <&vga_bridge_in>;
>  					arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
>  				};
>  			};
> -
> -			panel {
> -				compatible = "panel-dpi";
> -
> -				port {
> -					clcd_panel: endpoint {
> -						remote-endpoint = <&clcd_pads>;
> -					};
> -				};
> -
> -				/* Standard 640x480 VGA timings */
> -				panel-timing {
> -					clock-frequency = <25175000>;
> -					hactive = <640>;
> -					hback-porch = <48>;
> -					hfront-porch = <16>;
> -					hsync-len = <96>;
> -					vactive = <480>;
> -					vback-porch = <33>;
> -					vfront-porch = <10>;
> -					vsync-len = <2>;
> -				};
> -			};
>  		};
>  	};
>  };
> -- 
> 2.14.3
> 
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