linux-kernel - Re: [PATCH v6 09/10] arm64: dts: qcom: sc7180: Add support for HDCP in dp-controller

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Message-ID: <3bbd070a-6739-db35-79a4-141f738b2d8c@quicinc.com>
Date:   Wed, 18 Jan 2023 17:32:41 -0800
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Mark Yacoub <markyacoub@...omium.org>, <quic_khsieh@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <intel-gfx@...ts.freedesktop.org>
CC:     <robdclark@...il.com>, <dmitry.baryshkov@...aro.org>,
        <sean@...rly.run>, <airlied@...il.com>, <daniel@...ll.ch>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...ainline.org>, <jani.nikula@...ux.intel.com>,
        <joonas.lahtinen@...ux.intel.com>, <rodrigo.vivi@...el.com>,
        <tvrtko.ursulin@...ux.intel.com>, <tzimmermann@...e.de>,
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        <marex@...x.de>, <quic_jesszhan@...cinc.com>,
        <bjorn.andersson@...aro.org>, <abhinavk@...eaurora.org>,
        <seanpaul@...omium.org>
Subject: Re: [PATCH v6 09/10] arm64: dts: qcom: sc7180: Add support for HDCP
 in dp-controller

Hi Mark

On 1/18/2023 11:30 AM, Mark Yacoub wrote:
> From: Sean Paul <seanpaul@...omium.org>
> 
> This patch adds the register ranges required for HDCP key injection and
> HDCP TrustZone interaction as described in the dt-bindings for the
> sc7180 dp controller. Now that these are supported, change the
> compatible string to "dp-hdcp".
> 
> Signed-off-by: Sean Paul <seanpaul@...omium.org>
> Signed-off-by: Mark Yacoub <markyacoub@...omium.org>
> Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-15-sean@poorly.run #v1
> Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-14-sean@poorly.run #v2
> Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-14-sean@poorly.run #v3
> Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-14-sean@poorly.run #v4
> Link: https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-10-sean@poorly.run #v5
> 
> Changes in v3:
> -Split off into a new patch containing just the dts change (Stephen)
> -Add hdcp compatible string (Stephen)
> Changes in v4:
> -Rebase on Bjorn's multi-dp patchset
> Changes in v5:
> -Put the tz register offsets in trogdor dtsi (Rob C)
> Changes in v6:
> -Rebased: Removed modifications in sc7180.dtsi as it's already upstream
> 
> ---
>   arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> index 178efaaa89ec..6f6fe5cb6563 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> @@ -817,6 +817,14 @@ &mdss_dp {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&dp_hot_plug_det>;
>   	data-lanes = <0 1>;
> +
> +	reg = <0 0x0ae90000 0 0x200>,
> +	      <0 0x0ae90200 0 0x200>,
> +	      <0 0x0ae90400 0 0xc00>,
> +	      <0 0x0ae91000 0 0x400>,
> +	      <0 0x0ae91400 0 0x400>,
> +	      <0 0x0aed1000 0 0x175>,
> +	      <0 0x0aee1000 0 0x2c>;
>   };

Can you pls point me to which tree you rebased this on top of?

The mdss_dp node looks different here: 
https://gitlab.com/linux-kernel/linux-next/-/blob/master/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi#L815

For the TZ regs the second entry is fine but any reason for the size of 
the first register space to be 0x175 instead of 0x174?



>   
>   &pm6150_adc {