Re: [PATCH v22 3/8] dt-bindings: display: bridge: Add Cadence MHDP8501

Laurentiu Palcu
2026-04-24T14:38:05Z

On Fri, Apr 24, 2026 at 07:31:54AM -0500, Rob Herring (Arm) wrote:
>
> On Fri, 24 Apr 2026 11:07:16 +0000, Laurentiu Palcu wrote:
> > From: Sandor Yu <Sandor.yu@nxp.com>
> >
> > Add bindings for Cadence MHDP8501 DisplayPort/HDMI bridge.
> >
> > Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
> > Signed-off-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
> > ---
> > .../bindings/display/bridge/cdns,mhdp8501.yaml | 135 +++++++++++++++++++++
> > 1 file changed, 135 insertions(+)
> >
>
> My bot found errors running 'make dt_binding_check' on your patch:
>
> yamllint warnings/errors:
>
> dtschema/dtc warnings/errors:
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.yaml: Unresolvable reference: /schemas/phy/fsl,imx8mq-hdptx-phy.yaml#
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.example.dtb: display-bridge@32c00000 (fsl,imx8mq-mhdp8501): phy: False schema does not allow {'compatible': ['fsl,imx8mq-hdptx-phy'], '#phy-cells': 0, 'clocks': [[4294967295], [4294967295, 248]], 'clock-names': ['ref', 'apb'], 'phandle': 2}
> from schema $id: http://devicetree.org/schemas/display/bridge/cdns,mhdp8501.yaml
> Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.example.dtb: /example-0/display-bridge@32c00000/phy: failed to match any schema with compatible: ['fsl,imx8mq-hdptx-phy']
>
> doc reference errors (make refcheckdocs):
>
> See https://patchwork.kernel.org/project/devicetree/patch/20260424-dcss-hdmi-upstreaming-v22-3-30a28f89298d@oss.nxp.com
>
> The base for the series is generally the latest rc1. A different dependency
> should be noted in *this* patch.
>
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:
>
> pip3 install dtschema --upgrade
>
> Please check and re-submit after running the above command yourself. Note
> that DT_SCHEMA_FILES can be set to your schema file to speed up checking
> your schema. However, it must be unset to test all examples with your schema.
>

It appears the problem is triggered by the fact that the dt-binding
patch adding fsl,imx8mq-hdptx-phy.yaml comes later than this patch... I
only tested with dt_binding_check after all patches were applied. :/
I'll reorder the patches in the next version.

--
Thanks,
Laurentiu