Re: [PATCH v2 13/18] arm64: dts: qcom: sc7180: Add compat qcom,mdss-dsi-ctrl-sc7180

[Doug Anderson]

Hi,

On Mon, Nov 7, 2022 at 3:57 PM Bryan O'Donoghue
<bryan.odonoghue@xxxxxxxxxx> wrote:
>
> Add silicon specific compatible qcom,mdss-dsi-ctrl-sc7180 to the
> mdss-dsi-ctrl block. This allows us to differentiate the specific bindings
> for sc7180 against the yaml documentation.
>
> Cc: Andy Gross <agross@xxxxxxxxxx>
> Cc: Bjorn Andersson <andersson@xxxxxxxxxx>
> Cc: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
> Cc: linux-arm-msm@xxxxxxxxxxxxxxx
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Cc: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
> Cc: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index d2c374e9d8c03..07acb7f843d62 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -2985,7 +2985,8 @@ opp-460000000 {
>                         };
>
>                         dsi0: dsi@ae94000 {
> -                               compatible = "qcom,mdss-dsi-ctrl";
> +                               compatible = "qcom,mdss-dsi-ctrl-sc7180",
> +                                            "qcom,mdss-dsi-ctrl";

This seems fine, but I don't think it matches your bindings. Your
bindings says you can have one compatible string. It could be
"qcom,mdss-dsi-ctrl-sc7180" or it could be "qcom,mdss-dsi-ctrl".
...but your device tree has two compatible strings: the SoC specific
one and the fallback one. You need to change your bindings to make
this work.

-Doug