On 6/14/23 14:32, Leonard Göhrs wrote:
> Some MIPI DBI panels support a three wire mode (clock, chip select,
> bidirectional data) that can be used to ask the panel if it is already set
> up by e.g. the bootloader and can thus skip the initialization.
> This enables a flicker-free boot.
>
> Signed-off-by: Leonard Göhrs <l.goehrs@pengutronix.de>
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
> .../devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
> index c07da1a9e6288..2f0238b770eba 100644
> --- a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
> @@ -87,6 +87,8 @@ properties:
> Logic level supply for interface signals (Vddi).
> No need to set if this is the same as power-supply.
>
> + spi-3wire: true
> +
> required:
> - compatible
> - reg