On Mon, Aug 04, 2025 at 12:31:31PM +0800, Yongxing Mou wrote:
>
>
> On 2025/8/2 17:56, Dmitry Baryshkov wrote:
> > On Wed, Jul 30, 2025 at 05:42:28PM +0800, Yongxing Mou wrote:
> > > Document the MDSS hardware found on the Qualcomm QCS8300 platform.
> > >
> > > Signed-off-by: Yongxing Mou <quic_yong...@quicinc.com>
> > > ---
> > > .../bindings/display/msm/qcom,qcs8300-mdss.yaml | 284
> > > +++++++++++++++++++++
> > > 1 file changed, 284 insertions(+)
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/display/msm/qcom,qcs8300-mdss.yaml
> > > b/Documentation/devicetree/bindings/display/msm/qcom,qcs8300-mdss.yaml
> > > new file mode 100644
> > > index
> > > 0000000000000000000000000000000000000000..ae4bc16395326bffd6c9eff92778d9f207209526
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/display/msm/qcom,qcs8300-mdss.yaml
> > > @@ -0,0 +1,284 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/display/msm/qcom,qcs8300-mdss.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Qualcomm Technologies, Inc. QCS8300 Display MDSS
> > > +
> > > +maintainers:
> > > + - Yongxing Mou <quic_yong...@quicinc.com>
> > > +
> > > +description:
> > > + QCS8300 MSM Mobile Display Subsystem(MDSS), which encapsulates
> > > sub-blocks like
> > > + DPU display controller, DP interfaces and EDP etc.
> > > +
> > > +$ref: /schemas/display/msm/mdss-common.yaml#
> > > +
> > > +properties:
> > > + compatible:
> > > + const: qcom,qcs8300-mdss
> > > +
> > > + clocks:
> > > + items:
> > > + - description: Display AHB
> > > + - description: Display hf AXI
> > > + - description: Display core
> > > +
> > > + iommus:
> > > + maxItems: 1
> > > +
> > > + interconnects:
> > > + maxItems: 3
> > > +
> > > + interconnect-names:
> > > + maxItems: 3
> > > +
> > > +patternProperties:
> > > + "^display-controller@[0-9a-f]+$":
> > > + type: object
> > > + additionalProperties: true
> > > +
> > > + properties:
> > > + compatible:
> > > + items:
> > > + - const: qcom,qcs8300-dpu
> > > + - const: qcom,sa8775p-dpu
> >
> > Use contains: instead of listing both of them
> >
> Got it, thanks~ here we want to fallback qcs8300 to sa8775p.
> Should we update it to :
> + contains:
> + enum:
> + - qcom,qcs8300-dpu
> + - qcom,sa8775p-dpu
>
> above method can be validated using dt_binding_check.
_instead_ of listing both of them
So:
contains:
const: qcom,qcs8300-dpu
> > > +
> > > + "^displayport-controller@[0-9a-f]+$":
> > > + type: object
> > > + additionalProperties: true
> > > +
> > > + properties:
> > > + compatible:
> > > + items:
> > > + - const: qcom,qcs8300-dp
> > > +
> > > + "^phy@[0-9a-f]+$":
> > > + type: object
> > > + additionalProperties: true
> > > + properties:
> > > + compatible:
> > > + items:
> > > + - const: qcom,qcs8300-edp-phy
> > > + - const: qcom,sa8775p-edp-phy
> >
> > Use contains: instead of listing both of them
> >
> Same as above
> > > +
> > > +required:
> > > + - compatible
> > > +
> > > +unevaluatedProperties: false
> > > +
> >
>
--
With best wishes
Dmitry
