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

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Date:   Thu, 19 Jan 2023 10:40:31 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Mark Yacoub <markyacoub@...omium.org>
Cc:     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, robdclark@...il.com,
        quic_abhinavk@...cinc.com, 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, ville.syrjala@...ux.intel.com,
        stanislav.lisovskiy@...el.com, matthew.d.roper@...el.com,
        imre.deak@...el.com, lucas.demarchi@...el.com,
        manasi.d.navare@...el.com, swati2.sharma@...el.com,
        bhanuprakash.modem@...el.com, javierm@...hat.com,
        jose.souza@...el.com, lyude@...hat.com, hbh25y@...il.com,
        arun.r.murthy@...el.com, ashutosh.dixit@...el.com,
        ankit.k.nautiyal@...el.com, maxime@...no.tech, swboyd@...omium.org,
        christophe.jaillet@...adoo.fr, quic_sbillaka@...cinc.com,
        johan+linaro@...nel.org, dianders@...omium.org, 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

On Wed, 18 Jan 2023 at 21:30, Mark Yacoub <markyacoub@...omium.org> 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".

No change in compatibles, so patch description should be updated.

>
> 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

Again, this probably belongs to a cover letter

>
> 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>;

Is there any reason for adding these to the -trogdor instead of adding
them to the base dtsi? Does hardware differ between the sc7180.dtsi
and sc7180-trogdor.dtsi?

>  };
>
>  &pm6150_adc {
> --
> 2.39.0.246.g2a6d74b583-goog
>


-- 
With best wishes
Dmitry