Re: [PATCH v11 20/21] dt-bindings: display: rockchip: dw-dp: Fix sound DAI cells

[Rob Herring <robh@kernel.org>]

On Thu, Aug 06, 2026 at 05:39:59PM +0000, sashiko-bot@kernel.org wrote:
> Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> - [Medium] Device Tree schema validation breakage for existing `rockchip,rk3588-dp` configurations.
> --
> 
> --- Patch [20]: [PATCH v11 20/21] dt-bindings: display: rockchip: dw-dp: Fix sound DAI cells ---
> commit 2c15bbfcf4dec184872abdf4c2e06063a52d1e2f
> Author: Sebastian Reichel <sebastian.reichel@collabora.com>
> 
> dt-bindings: display: rockchip: dw-dp: Fix sound DAI cells
> 
> The RK3588 and RK3576 DesignWare DisplayPort controllers both have two
> possible DAI interfaces: I2S and S/PDIF. Thus an argument is needed to
> to select the right interface.
> 
> > diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-dp.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-dp.yaml
> > index 2b0d9e23e9432..c4f8959dd65da 100644
> > --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-dp.yaml
> > +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-dp.yaml
> [ ... ]
> > @@ -83,7 +83,8 @@ properties:
> >      maxItems: 1
> >  
> >    "#sound-dai-cells":
> > -    const: 0
> > +    const: 1
> > +    description: 0 for I2S, 1 for S/PDIF
> 
> [Severity: Medium]
> Will this strict constraint update cause make dtbs_check validation to
> fail for existing in-tree device trees?
> 
> The mainline arch/arm64/boot/dts/rockchip/rk3588-base.dtsi still defines
> #sound-dai-cells = <0>; for DP nodes.
> 
> While the commit message notes this breakage is intentional and will be
> fixed up separately, could changing the schema without the accompanying
> DTS updates cause automated CI validation failures and break bisectability?

Yes, and I don't love the intermittent warnings introduced. As long as 
the warnings are on a downward trajectory, I won't notice...

Not saying you have to do something here, but this will get more 
strict...

Rob