linux-kernel - [PATCH v2 3/4] arm64: dts: qcom: Disable MDSS by default for 8916/8016 devices

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Date:   Sat, 30 Jan 2021 11:57:12 +0100
From:   Vincent Knecht <vincent.knecht@...loo.org>
To:     phone-devel@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        Vincent Knecht <vincent.knecht@...loo.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>, Arnd Bergmann <arnd@...db.de>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Daniel Palmer <daniel@...f.com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Max Merchel <Max.Merchel@...group.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        allen <allen.chen@....com.tw>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: [PATCH v2 3/4] arm64: dts: qcom: Disable MDSS by default for 8916/8016 devices

Disable MDSS (Mobile Display Subsystem) by default in msm8916.dtsi
and only explicitly enable it in devices' DT which actually use it.

This leads to faster boot and cleaner logs for other devices,
which also won't have to explicitly disable MDSS to use framebuffer.

Signed-off-by: Vincent Knecht <vincent.knecht@...loo.org>
---
 arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi                  | 4 ++++
 arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi | 4 ++++
 arch/arm64/boot/dts/qcom/msm8916.dtsi                      | 1 +
 3 files changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi b/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
index 3a9538e1ec97..6aef0c2e4f0a 100644
--- a/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
@@ -301,6 +301,10 @@ &lpass {
 	status = "okay";
 };
 
+&mdss {
+	status = "okay";
+};
+
 &pm8916_resin {
 	status = "okay";
 	linux,code = <KEY_VOLUMEDOWN>;
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
index f1af798abd74..230ba3ce3277 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
@@ -132,6 +132,10 @@ &dsi0 {
 	pinctrl-1 = <&mdss_sleep>;
 };
 
+&mdss {
+	status = "okay";
+};
+
 &pm8916_resin {
 	status = "okay";
 	linux,code = <KEY_VOLUMEDOWN>;
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 402e891a84ab..8f9a651d3827 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -913,6 +913,7 @@ tcsr: syscon@...7000 {
 		};
 
 		mdss: mdss@...0000 {
+			status = "disabled";
 			compatible = "qcom,mdss";
 			reg = <0x01a00000 0x1000>,
 			      <0x01ac8000 0x3000>;
-- 
2.29.2