linux-kernel - [PATCH v6 08/10] dt-bindings: msm/dp: Add bindings for HDCP registers

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Message-Id: <20230118193015.911074-9-markyacoub@google.com>
Date:   Wed, 18 Jan 2023 19:30:13 +0000
From:   Mark Yacoub <markyacoub@...omium.org>
To:     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, quic_abhinavk@...cinc.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,
        markyacoub@...omium.org, 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,
        Rob Herring <robh@...nel.org>,
        Mark Yacoub <markyacoub@...omiu.org>
Subject: [PATCH v6 08/10] dt-bindings: msm/dp: Add bindings for HDCP registers

From: Sean Paul <seanpaul@...omium.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@...nel.org>
Cc: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Signed-off-by: Mark Yacoub <markyacoub@...omiu.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
Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-13-sean@poorly.run #v4
Link: https://patchwork.freedesktop.org/patch/msgid/20211115202153.117244-1-sean@poorly.run #v4.5
Link: https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-9-sean@poorly.run #v5

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
Changes in v4.5:
-Remove maxItems from reg (Rob)
-Remove leading zeros in example (Rob)
Changes in v5:
-None
Changes in v6:
-Rebased: modify minItems instead of adding it as new line.

---
 .../devicetree/bindings/display/msm/dp-controller.yaml    | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
index f2515af8256f..17d741f9af86 100644
--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
@@ -24,13 +24,15 @@ properties:
       - qcom,sm8350-dp
 
   reg:
-    minItems: 4
+    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
@@ -154,7 +156,9 @@ examples:
               <0xae90200 0x200>,
               <0xae90400 0xc00>,
               <0xae91000 0x400>,
-              <0xae91400 0x400>;
+              <0xae91400 0x400>,
+              <0xaed1000 0x174>,
+              <0xaee1000 0x2c>;
         interrupt-parent = <&mdss>;
         interrupts = <12>;
         clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
-- 
2.39.0.246.g2a6d74b583-goog