linux-kernel - [PATCH v1 4/4] arm64: dts: sdm845: Add zap shader region for GPU

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Message-Id: <1552414422-9568-5-git-send-email-jcrouse@codeaurora.org>
Date:   Tue, 12 Mar 2019 12:13:42 -0600
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     freedreno@...ts.freedesktop.org
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andy Gross <andy.gross@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v1 4/4] arm64: dts: sdm845: Add zap shader region for GPU

Some Adreno GPU targets require a special zap shader to bring the GPU
out of secure mode. Define a region to allocate and store the zap
shader.

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

 arch/arm64/boot/dts/qcom/sdm845.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index fed7a29..526456d 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -100,6 +100,11 @@
 			no-map;
 		};
 
+		zap_shader_region: memory@...15000 {
+			reg = <0 0x8c415000 0 0x2000>;
+			no-map;
+		};
+
 		mpss_region: memory@...00000 {
 			reg = <0 0x8e000000 0 0x7800000>;
 			no-map;
@@ -109,6 +114,8 @@
 			reg = <0 0x96500000 0 0x200000>;
 			no-map;
 		};
+
+
 	};
 
 	cpus {
@@ -1514,6 +1521,10 @@
 
 			qcom,gmu = <&gmu>;
 
+			zap-shader {
+				memory-region = <&zap_shader_region>;
+			};
+
 			gpu_opp_table: opp-table {
 				compatible = "operating-points-v2";
 
-- 
2.7.4