[PATCH 1/2] dt-bindings: drm: bridge: adi,adv7533: Document adi,disable-lanes-override property

[Krzysztof Kozlowski]

On 09/03/2022 16:11, Biju Das wrote:
> On Renesas RZ/{G2L,V2L} platforms changing the lanes from 4 to 3 at
> lower frequencies causes display instability. On such platforms, it
> is better to avoid switching lanes from 4 to 3 as it needs different
> set of PLL parameter constraints to make the display stable with 3
> lanes.
> 
> This patch introduces 'adi,disable-lanes-override' property to disable
> lane switching at lower frequencies.
> 
> Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
> ---
>  .../devicetree/bindings/display/bridge/adi,adv7533.yaml      | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
> index f36209137c8a..2dc378039d21 100644
> --- a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
> @@ -84,6 +84,11 @@ properties:
>        timings for HDMI output.
>      type: boolean
>  
> +  adi,disable-lanes-override:
> +    description:
> +      Disables the overriding lanes at lower frequencies.
> +    type: boolean

The bindings should not focus on desired feature/functionality of
driver, but hardware. You are now encoding the driver behavior in the
bindings.

Best regards,
Krzysztof