From b55ee6b243bd2743b9cb20b6aa812091748c4304 Mon Sep 17 00:00:00 2001
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Fri, 19 Apr 2019 13:46:16 -0600
Subject: [PATCH] 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@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.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 c04614c63ea9e..2b8fd26c43b07 100644
--- a/Documentation/devicetree/bindings/display/msm/gpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/gpu.txt
@@ -27,6 +27,9 @@ 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:
@@ -75,5 +78,9 @@ Example a6xx (with GMU):
interconnects = <&rsc_hlos MASTER_GFX3D &rsc_hlos SLAVE_EBI1>;
qcom,gmu = <&gmu>;
+
+ zap-shader {
+ memory-region = <&zap_shader_region>;
+ };
};
};
--
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