[PATCH v1 3/4] dt-bindings: drm/msm/gpu: Document a5xx / a6xx zap shader region

Jordan Crouse
2019-03-12T18:13:41Z

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

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.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>;
+ };
};
};