[PATCH v1 1/3] dt-bindings: display: rockchip: analogix-dp: Expose inherited properties

[Conor Dooley]

On Fri, May 15, 2026 at 11:57:58AM +0800, Damon Ding wrote:
> Hi Conor,
> 
> On 5/15/2026 2:16 AM, Conor Dooley wrote:
> > On Thu, May 14, 2026 at 03:01:31PM +0800, Damon Ding wrote:
> > > Expose the inherited properties from the base analogix-dp schema
> > > to satisfy unevaluatedProperties constraints.
> > > 
> > > Signed-off-by: Damon Ding <damon.ding at rock-chips.com>
> > 
> > Given it's unevaluatedProperties, not addtionalProperties, this patch
> > shouldn't be needed?
> > 
> 
> When I remove both the top-level data-lanes property and those explicit
> "xxx: true" property entries and run the dtbs check with:
> 
> make CHECK_DTBS=y CROSS_COMPILE=aarch64-linux-gnu- LT0=none LLVM=1
> LLVM_IAS=1 ARCH=arm64 rockchip/rk3588-evb1-v10.dtb
> rockchip/rk3588s-evb1-v10.dtb rockchip/rk3399-sapphire-excavator.dtb
> rockchip/rk3576-evb1-v10.dtb -j4
> 
> It results in validation errors like these:
> 
> /home/ding/drm-misc/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dtb:
> edp at 27dc0000: ports:port at 1:endpoint: Unevaluated properties are not allowed
> ('data-lanes' was unexpected)
>         from schema $id:
> http://devicetree.org/schemas/display/rockchip/rockchip,analogix-dp.yaml#
> /home/ding/drm-misc/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dtb:
> edp at 27dc0000: Unevaluated properties are not allowed ('force-hpd',
> 'interrupts', 'phy-names', 'phys', 'ports', 'reg' were unexpected)
>         from schema $id:
> http://devicetree.org/schemas/display/rockchip/rockchip,analogix-dp.yaml#
> 
> I suspect that the properties defined in the child binding are
> overriding/masking all the inherited properties from the parent Analogix DP
> schema.
> 
> Is there a better way to fix this issue without explicitly listing all
> inherited properties as true?

The example in this file uses most of the properties that you mention
above:
    dp at ff970000 {
      compatible = "rockchip,rk3288-dp";
      reg = <0xff970000 0x4000>;
      interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
      clocks = <&cru SCLK_EDP>, <&cru PCLK_EDP_CTRL>;
      clock-names = "dp", "pclk";
      phys = <&dp_phy>;
      phy-names = "dp";
      resets = <&cru 111>;
      reset-names = "dp";
      rockchip,grf = <&grf>;
      pinctrl-0 = <&edp_hpd>;
      pinctrl-names = "default";

dt_binding_check reports no problems with this node, so I think the
problem might lie elsewhere?
There's no edp node in the dts you mention above, so this looks like an
interaction with something that's not yet upstream.

If this is required for the rk3576 edp, then you should include this
patch in the rk3576 edp support series rather than this one anyway where
it can actually be evaluated alongside the node it apparently causes
problems with.

pw-bot: changes-requested

Thanks,
Conor.

> 
> Best regards,
> Damon
> 
> > > ---
> > >   .../bindings/display/rockchip/rockchip,analogix-dp.yaml    | 7 +++++++
> > >   1 file changed, 7 insertions(+)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
> > > index bb75d898a5c5..896ded87880f 100644
> > > --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
> > > +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
> > > @@ -50,6 +50,13 @@ properties:
> > >     aux-bus:
> > >       $ref: /schemas/display/dp-aux-bus.yaml#
> > > +  reg: true
> > > +  interrupts: true
> > > +  phys: true
> > > +  phy-names: true
> > > +  force-hpd: true
> > > +  ports: true
> > > +
> > >   required:
> > >     - compatible
> > >     - clocks
> > > -- 
> > > 2.34.1
> > > 
> > > 
> 
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