Re: [PATCH v3 1/2] dt-bindings: display/msm: dsi-controller-main: Fix deprecated compatible

["Bryan O'Donoghue" <bryan.odonoghue@xxxxxxxxxx>]

On 04/03/2023 17:35, Konrad Dybcio wrote:
> > you'll see no error. However if you just do this
> >
> > diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> > index 0733c2f4f3798..829fbe05b5713 100644
> > --- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> > @@ -1094,8 +1094,7 @@ mdp5_intf1_out: endpoint {
> >                          };
> >
> >                          dsi0: dsi@1a98000 {
> > -                               compatible = "qcom,msm8916-dsi-ctrl",
> > -                                            "qcom,mdss-dsi-ctrl";
> > +                               compatible = "qcom,mdss-dsi-ctrl";
> >                                  reg = <0x01a98000 0x25c>;
> >                                  reg-names = "dsi_ctrl";
> >
> >
> > and run the same test you get
> Yes, correct. It's valid but it's deprecated, so the bindings are
> sane. Keep in mind there's an ABI-like aspect to this.
>
> Konrad

The _driver_ will still accept "qcom,mdss-dsi-ctrl" which is ABI 
compliant but, I don't see why the yaml should.

If you declare a new .dts with only "qcom,mdss-dsi-ctrl", that should 
throw a yaml check error.

---
bod