Re: [PATCH v4 12/14] dt-bindings: msm/dp: Add bindings for HDCP registers

[Rob Herring <robh@kernel.org>]

On Thu, Nov 04, 2021 at 11:04:29PM -0400, Sean Paul wrote:
> From: Sean Paul <seanpaul@chromium.org>
> 
> This patch adds the bindings for the MSM DisplayPort HDCP registers
> which are required to write the HDCP key into the display controller as
> well as the registers to enable HDCP authentication/key
> exchange/encryption.
> 
> We'll use a new compatible string for this since the fields are optional.
> 
> Cc: Rob Herring <robh@kernel.org>
> Cc: Stephen Boyd <swboyd@chromium.org>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-13-sean@poorly.run #v1
> Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-13-sean@poorly.run #v2
> Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-13-sean@poorly.run #v3
> 
> Changes in v2:
> -Drop register range names (Stephen)
> -Fix yaml errors (Rob)
> Changes in v3:
> -Add new compatible string for dp-hdcp
> -Add descriptions to reg
> -Add minItems/maxItems to reg
> -Make reg depend on the new hdcp compatible string
> Changes in v4:
> -Rebase on Bjorn's multi-dp patchset
> ---
>  .../devicetree/bindings/display/msm/dp-controller.yaml    | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> index b36d74c1da7c..f6e4b102373a 100644
> --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> @@ -21,12 +21,16 @@ properties:
>        - qcom,sc8180x-edp
>  
>    reg:
> +    minItems: 5
> +    maxItems: 7

This should be a warning. Not sure why the bot didn't run. You just need 
'minItems: 5'

>      items:
>        - description: ahb register block
>        - description: aux register block
>        - description: link register block
>        - description: p0 register block
>        - description: p1 register block
> +      - description: (Optional) Registers for HDCP device key injection
> +      - description: (Optional) Registers for HDCP TrustZone interaction
>  
>    interrupts:
>      maxItems: 1
> @@ -111,7 +115,9 @@ examples:
>                <0xae90200 0x200>,
>                <0xae90400 0xc00>,
>                <0xae91000 0x400>,
> -              <0xae91400 0x400>;
> +              <0xae91400 0x400>,
> +              <0x0aed1000 0x174>,
> +              <0x0aee1000 0x2c>;

Be consistent and drop the leading 0.

>          interrupt-parent = <&mdss>;
>          interrupts = <12>;
>          clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
> -- 
> Sean Paul, Software Engineer, Google / Chromium OS
> 
>