linux-kernel - [PATCH v2 3/3] dt-bindings: drm/msm/gpu: Document a5xx / a6xx zap shader region

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Message-Id: <1555703176-5499-4-git-send-email-jcrouse@codeaurora.org>
Date:   Fri, 19 Apr 2019 13:46:16 -0600
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     freedreno@...ts.freedesktop.org
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Sean Paul <sean@...rly.run>, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, Rob Herring <robh+dt@...nel.org>,
        Rob Clark <robdclark@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Mark Rutland <mark.rutland@....com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: [PATCH v2 3/3] dt-bindings: drm/msm/gpu: Document a5xx / a6xx zap shader region

Describe the zap-shader node that defines a reserved memory region
to store the zap shader.

Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
---

 Documentation/devicetree/bindings/display/msm/gpu.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/msm/gpu.txt b/Documentation/devicetree/bindings/display/msm/gpu.txt
index aad1aef..1e6d870 100644
--- a/Documentation/devicetree/bindings/display/msm/gpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/gpu.txt
@@ -25,6 +25,9 @@ Required properties:
 - qcom,gmu: For GMU attached devices a phandle to the GMU device that will
   control the power for the GPU. Applicable targets:
     - qcom,adreno-630.2
+- zap-shader: For a5xx and a6xx devices this node contains a memory-region that
+  points to reserved memory to store the zap shader that can be used to help
+  bring the GPU out of secure mode.
 
 Example 3xx/4xx/a5xx:
 
@@ -71,5 +74,9 @@ Example a6xx (with GMU):
 		operating-points-v2 = <&gpu_opp_table>;
 
 		qcom,gmu = <&gmu>;
+
+		zap-shader {
+			memory-region = <&zap_shader_region>;
+		};
 	};
 };
-- 
2.7.4