Re: [PATCH v2 3/4] dt-bindings: exynos-dp: update ports node binding for panel

[Rob Herring <robh@kernel.org>]

On Mon, Dec 07, 2015 at 09:52:37PM +0900, Inki Dae wrote:
> This patch updates a ports node binding for panel.
> 
> With this, dp node can have a ports node which describes
> a remote endpoint node that can be connected to panel or bridge
> node.
> 
> Changelog v2:
> - remove unnecessary properties and numbering.
> - update description about eDP device.
> 
> Signed-off-by: Inki Dae <inki.dae@samsung.com>
> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

Acked-by: Rob Herring <robh@kernel.org>

> ---
>  .../bindings/display/exynos/exynos_dp.txt          | 41 +++++++++++++++++++---
>  1 file changed, 37 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt b/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
> index 64693f2..22efeba 100644
> --- a/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
> +++ b/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
> @@ -1,3 +1,20 @@
> +Device-Tree bindings for Samsung Exynos Embedded DisplayPort Transmitter(eDP)
> +
> +DisplayPort is industry standard to accommodate the growing board adoption
> +of digital display technology within the PC and CE industries.
> +It consolidates the internal and external connection methods to reduce device
> +complexity and cost. It also supports necessary features for important cross
> +industry applications and provides performance scalability to enable the next
> +generation of displays that feature higher color depths, refresh rates, and
> +display resolutions.
> +
> +eDP (embedded display port) device is compliant with Embedded DisplayPort
> +standard as follows,
> +- DisplayPort standard 1.1a for Exynos5250 and Exynos5260.
> +- DisplayPort standard 1.3 for Exynos5422s and Exynos5800.
> +
> +eDP resides between FIMD and panel or FIMD and bridge such as LVDS.
> +
>  The Exynos display port interface should be configured based on
>  the type of panel connected to it.
>  
> @@ -66,8 +83,15 @@ Optional properties for dp-controller:
>  		Hotplug detect GPIO.
>  			Indicates which GPIO should be used for hotplug
>  			detection
> -	-video interfaces: Device node can contain video interface port
> -			    nodes according to [1].
> +Video interfaces:
> +  Device node can contain video interface port nodes according to [1].
> +  The following are properties specific to those nodes:
> +
> +  endpoint node connected to bridge or panel node:
> +   - remote-endpoint: specifies the endpoint in panel or bridge node.
> +		      This node is required in all kinds of exynos dp
> +		      to represent the connection between dp and bridge
> +		      or dp and panel.
>  
>  [1]: Documentation/devicetree/bindings/media/video-interfaces.txt
>  
> @@ -111,9 +135,18 @@ Board Specific portion:
>  		};
>  
>  		ports {
> -			port@0 {
> +			port {
>  				dp_out: endpoint {
> -					remote-endpoint = <&bridge_in>;
> +					remote-endpoint = <&dp_in>;
> +				};
> +			};
> +		};
> +
> +		panel {
> +			...
> +			port {
> +				dp_in: endpoint {
> +					remote-endpoint = <&dp_out>;
>  				};
>  			};
>  		};
> -- 
> 1.9.1
> 
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