On Mon, Apr 09, 2018 at 12:59:15PM +0200, Peter Rosin wrote:
> Useful for beating cases where an output mode selection heuristic
> fails.
> 
> Signed-off-by: Peter Rosin <p...@axentia.se>
> ---
>  Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt 
> b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt
> index 82f2acb3d374..dc478455b883 100644
> --- a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt
> +++ b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt
> @@ -10,6 +10,10 @@ Required properties:
>   - #address-cells: should be set to 1.
>   - #size-cells: should be set to 0.
>  
> +Optional properties:
> + - output-mode: override any output mode selection hueristic and force a
> +   particular output mode. One of "rgb444", "rgb565", "rgb666" and "rgb888".
> +

This needs to be generic, not just added to some random display 
controller binding.

It also belongs in the port or endpoint node as is done for camera 
interfaces.

Rob
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