linux-kernel - [PATCH v9 08/10] dt-bindings: msm/dp: Add bindings for HDCP registers

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Date:   Tue, 11 Apr 2023 15:21:32 -0400
From:   Mark Yacoub <markyacoub@...omium.org>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>
Cc:     seanpaul@...omium.org, suraj.kandpal@...el.com,
        dianders@...omium.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        Rob Herring <robh@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Mark Yacoub <markyacoub@...omium.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v9 08/10] dt-bindings: msm/dp: Add bindings for HDCP registers

From: Sean Paul <seanpaul@...omium.org>

Add 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.

Cc: Rob Herring <robh@...nel.org>
Cc: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Douglas Anderson <dianders@...omium.org>
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Signed-off-by: Mark Yacoub <markyacoub@...omium.org>

---
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.
Changes in v7:
-Revert the change to minItems
-Added the maxItems to Reg

 .../devicetree/bindings/display/msm/dp-controller.yaml     | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
index 0e8d8df686dc9..4763a2ff12fb7 100644
--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
@@ -34,6 +34,8 @@ properties:
       - 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
@@ -159,6 +161,7 @@ allOf:
         aux-bus: false
         reg:
           minItems: 5
+          maxItems: 7
       required:
         - "#sound-dai-cells"
 
@@ -176,7 +179,9 @@ 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>,
-- 
2.40.0.577.gac1e443424-goog