Re: [PATCH v5 1/2] dt-bindings: phy: qcom: Add CSI2 C-PHY/DPHY schema

Rob Herring (Arm)
2026-03-26T02:31:43Z

On Thu, 26 Mar 2026 01:04:43 +0000, Bryan O'Donoghue wrote:
> Add a base schema initially compatible with x1e80100 to describe MIPI CSI2
> PHY devices.
>
> The hardware can support both CPHY, DPHY and a special split-mode DPHY. We
> capture those modes as:
>
> - PHY_QCOM_CSI2_MODE_DPHY
> - PHY_QCOM_CSI2_MODE_CPHY
> - PHY_QCOM_CSI2_MODE_SPLIT_DPHY
>
> The CSIPHY devices have their own pinouts on the SoC as well as their own
> individual voltage rails.
>
> The need to model voltage rails on a per-PHY basis leads us to define
> CSIPHY devices as individual nodes.
>
> Two nice outcomes in terms of schema and DT arise from this change.
>
> 1. The ability to define on a per-PHY basis voltage rails.
> 2. The ability to require those voltage.
>
> We have had a complete bodge upstream for this where a single set of
> voltage rail for all CSIPHYs has been buried inside of CAMSS.
>
> Much like the I2C bus which is dedicated to Camera sensors - the CCI bus in
> CAMSS parlance, the CSIPHY devices should be individually modelled.
>
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> ---
> .../bindings/phy/qcom,x1e80100-csi2-phy.yaml | 130 +++++++++++++++++++++
> include/dt-bindings/phy/phy-qcom-mipi-csi2.h | 15 +++
> 2 files changed, 145 insertions(+)
>

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/phy/qcom,x1e80100-csi2-phy.example.dts:75.21-77.11: Warning (unit_address_vs_reg): /example-0/isp@acb7000: node has a unit name, but no reg or ranges property

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260326-x1e-csi2-phy-v5-1-0c0fc7f5c01b@linaro.org

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.