linux-kernel - [PATCH] arm64: dts: Add no-hpd property for all ti-sn65dsi86 bridge consumers

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Message-ID: <20250529112423.484232-1-j-choudhary@ti.com>
Date: Thu, 29 May 2025 16:54:23 +0530
From: Jayesh Choudhary <j-choudhary@...com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <neil.armstrong@...aro.org>, <khilman@...libre.com>,
        <devicetree@...r.kernel.org>
CC: <jbrunet@...libre.com>, <martin.blumenstingl@...glemail.com>,
        <shawnguo@...nel.org>, <s.hauer@...gutronix.de>,
        <kernel@...gutronix.de>, <festevam@...il.com>,
        <cros-qcom-dts-watchers@...omium.org>, <andersson@...nel.org>,
        <konradybcio@...nel.org>, <geert+renesas@...der.be>,
        <magnus.damm@...il.com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-amlogic@...ts.infradead.org>, <imx@...ts.linux.dev>,
        <linux-arm-msm@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
        <dianders@...omium.org>, <linux-kernel@...r.kernel.org>,
        <max.krummenacher@...adex.com>, <j-choudhary@...com>,
        <ernestvanhoecke@...il.com>
Subject: [PATCH] arm64: dts: Add no-hpd property for all ti-sn65dsi86 bridge consumers

In the SN65DSI86 DSI-2-eDP bridge, HPD is not supported as of now.
But DisplayPort connector_type usecases does need hpd to be enabled.
In order not to break any platform from those driver changes, add
"no-hpd" property to all the existing sn65dsi86 nodes (that don't
have it already) as hpd is not being used there anyways.

Signed-off-by: Jayesh Choudhary <j-choudhary@...com>
---

Upcoming driver changes that will break platforms if we do not have this
property in all the existing sn65dsi86 nodes that assumes hpd is disabled:
<https://lore.kernel.org/all/20250529110418.481756-1-j-choudhary@ti.com/>

(sc7180-trogdor-ti-sn65dsi86.dtsi, sdm850-lenovo-yoga-c630.dts and
sdm845-cheza.dtsi already have this property.)

NOTE: Grouping the logical changes together in a single patch even though
we have multiple vendor dts. I hope that is not an issue.

 .../boot/dts/amlogic/meson-g12b-bananapi-cm4-mnt-reform2.dts     | 1 +
 arch/arm64/boot/dts/freescale/imx8mq-mnt-reform2.dts             | 1 +
 arch/arm64/boot/dts/qcom/sc7180-acer-aspire1.dts                 | 1 +
 arch/arm64/boot/dts/renesas/r8a779a0-falcon-cpu.dtsi             | 1 +
 arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts            | 1 +
 arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts        | 1 +
 arch/arm64/boot/dts/renesas/white-hawk-cpu-common.dtsi           | 1 +
 7 files changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-bananapi-cm4-mnt-reform2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-bananapi-cm4-mnt-reform2.dts
index 0f48c32bec97..6a7d7db3ef8f 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-bananapi-cm4-mnt-reform2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-bananapi-cm4-mnt-reform2.dts
@@ -292,6 +292,7 @@ edp_bridge: bridge@2c {
 		vpll-supply = <&reg_main_1v8>;
 		vcca-supply = <&reg_main_1v2>;
 		vcc-supply = <&reg_main_1v2>;
+		no-hpd;
 
 		ports {
 			#address-cells = <1>;
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-mnt-reform2.dts b/arch/arm64/boot/dts/freescale/imx8mq-mnt-reform2.dts
index 3ae3824be027..599a53969326 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-mnt-reform2.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-mnt-reform2.dts
@@ -147,6 +147,7 @@ edp_bridge: bridge@2c {
 		vpll-supply = <&reg_main_1v8>;
 		vcca-supply = <&reg_main_1v2>;
 		vcc-supply = <&reg_main_1v2>;
+		no-hpd;
 
 		ports {
 			#address-cells = <1>;
diff --git a/arch/arm64/boot/dts/qcom/sc7180-acer-aspire1.dts b/arch/arm64/boot/dts/qcom/sc7180-acer-aspire1.dts
index 672ac4c3afa3..8fa18273684f 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-acer-aspire1.dts
+++ b/arch/arm64/boot/dts/qcom/sc7180-acer-aspire1.dts
@@ -384,6 +384,7 @@ sn65dsi86_bridge: bridge@2c {
 
 		clocks = <&rpmhcc RPMH_LN_BB_CLK3>;
 		clock-names = "refclk";
+		no-hpd;
 
 		ports {
 			#address-cells = <1>;
diff --git a/arch/arm64/boot/dts/renesas/r8a779a0-falcon-cpu.dtsi b/arch/arm64/boot/dts/renesas/r8a779a0-falcon-cpu.dtsi
index 0916fd57d1f1..a115e3fc4cb9 100644
--- a/arch/arm64/boot/dts/renesas/r8a779a0-falcon-cpu.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779a0-falcon-cpu.dtsi
@@ -214,6 +214,7 @@ bridge@2c {
 		vpll-supply = <&reg_1p8v>;
 		vcca-supply = <&reg_1p2v>;
 		vcc-supply = <&reg_1p2v>;
+		no-hpd;
 
 		ports {
 			#address-cells = <1>;
diff --git a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts
index 6955eafd8d6a..fcc2d8edd464 100644
--- a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts
+++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts
@@ -349,6 +349,7 @@ bridge@2c {
 				vpll-supply = <&reg_1p8v>;
 				vcca-supply = <&reg_1p2v>;
 				vcc-supply = <&reg_1p2v>;
+				no-hpd;
 
 				ports {
 					#address-cells = <1>;
diff --git a/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts b/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
index 4d890e0617af..8b9592b87366 100644
--- a/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
+++ b/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
@@ -460,6 +460,7 @@ bridge@2c {
 		vpll-supply = <&reg_1p8v>;
 		vcca-supply = <&reg_1p2v>;
 		vcc-supply = <&reg_1p2v>;
+		no-hpd;
 
 		ports {
 			#address-cells = <1>;
diff --git a/arch/arm64/boot/dts/renesas/white-hawk-cpu-common.dtsi b/arch/arm64/boot/dts/renesas/white-hawk-cpu-common.dtsi
index b4024e85ae5a..686a37a8680f 100644
--- a/arch/arm64/boot/dts/renesas/white-hawk-cpu-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/white-hawk-cpu-common.dtsi
@@ -256,6 +256,7 @@ bridge@2c {
 		vpll-supply = <&reg_1p8v>;
 		vcca-supply = <&reg_1p2v>;
 		vcc-supply = <&reg_1p2v>;
+		no-hpd;
 
 		ports {
 			#address-cells = <1>;
-- 
2.34.1