Re: [PATCH v6 10/21] dt-bindings: display: renesas,rzg2l-du: Add support for RZ/G3E SoC

Laurent Pinchart
2026-04-08T12:24:40Z

On Wed, Apr 08, 2026 at 12:36:55PM +0200, Tommaso Merciai wrote:
> The RZ/G3E SoC has 2 LCD controllers (LCDC), each containing a Frame
> Compression Processor (FCPVD), a Video Signal Processor (VSPD), and a
> Display Unit (DU).
>
> - LCDC0 supports DSI and LVDS (single or dual-channel) outputs.
> - LCDC1 supports DSI, LVDS (single-channel), and RGB outputs.
>
> Add a new SoC-specific compatible string 'renesas,r9a09g047-du'.
>
> Extend patternProperties from "^port@[0-1]$" to "^port@[0-3]$" to
> allow up to four output ports, and explicitly disable port@2 and port@3
> for existing SoCs that do not expose them.
>
> Describe the four output ports of the RZ/G3E DU:
>
> - port@0: DSI (available on both LCDC instances)
> - port@1: DPAD / parallel RGB (LCDC1 only)
> - port@2: LVDS channel 0 (LCDC0 only)
> - port@3: LVDS channel 1 (available on both LCDC instances)
>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
> ---
> v5->v6:
> - Extend patternProperties from "^port@[0-1]$" to "^port@[0-3]$" and
> explicitly disable port@2 and port@3 for existing SoCs that do not expose
> them.
> - Reworked ports numbering + improved/fixed ports descriptions in the
> bindings documentation.
> - Improved commit body.
>
> v4->v5:
> - Dropped renesas,id property and updated bindings
> accordingly.
>
> v2->v3:
> - No changes.
>
> v2->v3:
> - No changes.
>
> v1->v2:
> - Use single compatible string instead of multiple compatible strings
> for the two DU instances, leveraging a 'renesas,id' property to
> differentiate between DU0 and DU1.
> - Updated commit message accordingly.
>
> .../bindings/display/renesas,rzg2l-du.yaml | 30 ++++++++++++++++++-
> 1 file changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml b/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml
> index 5add3b832eab..32da0b5ec88c 100644
> --- a/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml
> +++ b/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml
> @@ -20,6 +20,7 @@ properties:
> - enum:
> - renesas,r9a07g043u-du # RZ/G2UL
> - renesas,r9a07g044-du # RZ/G2{L,LC}
> + - renesas,r9a09g047-du # RZ/G3E
> - renesas,r9a09g057-du # RZ/V2H(P)
> - items:
> - enum:
> @@ -61,7 +62,7 @@ properties:
> model-dependent. Each port shall have a single endpoint.
>
> patternProperties:
> - "^port@[0-1]$":
> + "^port@[0-3]$":
> $ref: /schemas/graph.yaml#/properties/port
> unevaluatedProperties: false
>
> @@ -103,6 +104,8 @@ allOf:
> port@0:
> description: DPI
> port@1: false
> + port@2: false
> + port@3: false
>
> required:
> - port@0
> @@ -119,6 +122,8 @@ allOf:
> description: DSI
> port@1:
> description: DPI
> + port@2: false
> + port@3: false
>
> required:
> - port@0
> @@ -135,9 +140,32 @@ allOf:
> port@0:
> description: DSI
> port@1: false
> + port@2: false
> + port@3: false
>
> required:
> - port@0
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: renesas,r9a09g047-du
> + then:
> + properties:
> + ports:
> + properties:
> + port@0:
> + description: DSI
> + port@1:
> + description: DPAD
> + port@2:
> + description: LVDS, Channel 0
> + port@3:
> + description: LVDS, Channel 1
> +
> + required:
> + - port@0
> + - port@3

Why are ports 1 and 2 not required ?

>
> examples:
> # RZ/G2L DU

--
Regards,

Laurent Pinchart