[PATCH v2] arm64: dts: qcom: monaco-arduino-monza: Add Waveshare 8" DSI touch overlay

[PATCH v2] arm64: dts: qcom: monaco-arduino-monza: Add Waveshare 8" DSI touch overlay

[Vishnu Saini]

The JMEDIA carrier card can be mounted on the Qualcomm Monaco Arduino
Monza platform and provides a 22-pin DSI0 connector. Add an overlay to
enable the Waveshare 8" DSI TOUCH-A kit on DSI0: the Waveshare GPIO
expander for panel supplies, resets and backlight, the Goodix GT9271
touch controller, supply regulators and the JD9365DA-based panel.

The expander and touch controller are on the CCI0 I2C bus, so enable
cci0 for them.

DSI0 is shared with the on-board HDMI path, so disable adv7535, the HDMI
connector and the hdmi-mi2s-playback-dai-link sound node, which would
otherwise wait for the disabled adv7535 codec. HDMI audio is therefore
unavailable while the overlay is applied. Add the hdmi_connector and
hdmi_mi2s_playback_dai_link labels to the base DTS for this.

Co-developed-by: Shashank Maurya <shashank.maurya@oss.qualcomm.com>
Signed-off-by: Shashank Maurya <shashank.maurya@oss.qualcomm.com>
Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
---
Changes in v2:
- Corrected removed redundent mdss_dsi supplies [Sashiko AI]
- Updated commit msg as 22-pin connector is on JMEDIA carrier mounted on main board.
- Link to v1: https://lore.kernel.org/r/20261114-monza_waveshare_dtso-v1-1-4b7c80e90e08@oss.qualcomm.com
---
 arch/arm64/boot/dts/qcom/Makefile                  |  5 ++
 ...naco-arduino-monza-waveshare-8-dsi-touch-a.dtso | 94 ++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts  |  4 +-
 3 files changed, 101 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 8329c06b60a3..331ae62494e5 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -83,6 +83,11 @@ dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza.dtb
 monaco-arduino-monza-el2-dtbs	:= monaco-arduino-monza.dtb monaco-el2.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza-el2.dtb
+
+monaco-arduino-monza-waveshare-8-dsi-touch-a-dtbs	:= monaco-arduino-monza.dtb monaco-el2.dtbo monaco-arduino-monza-waveshare-8-dsi-touch-a.dtbo
+dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza-waveshare-8-dsi-touch-a.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza-waveshare-8-dsi-touch-a.dtbo
+
 dtb-$(CONFIG_ARCH_QCOM)	+= monaco-ac-evk.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= monaco-evk.dtb
 
diff --git a/arch/arm64/boot/dts/qcom/monaco-arduino-monza-waveshare-8-dsi-touch-a.dtso b/arch/arm64/boot/dts/qcom/monaco-arduino-monza-waveshare-8-dsi-touch-a.dtso
new file mode 100644
index 000000000000..67fbff063955
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/monaco-arduino-monza-waveshare-8-dsi-touch-a.dtso
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	panel_avdd: regulator-panel-avdd {
+		compatible = "regulator-fixed";
+		regulator-name = "panel-avdd";
+		gpios = <&wsgpio 0 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	panel_iovcc: regulator-panel-iovcc {
+		compatible = "regulator-fixed";
+		regulator-name = "panel-iovcc";
+		gpios = <&wsgpio 4 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	regulator-panel-vcc {
+		compatible = "regulator-fixed";
+		regulator-name = "panel-vcc";
+		gpios = <&wsgpio 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+	};
+};
+
+&adv7535 {
+	status = "disabled";
+};
+
+&cci0 {
+	pinctrl-0 = <&cci0_0_default>;
+	pinctrl-1 = <&cci0_0_sleep>;
+	pinctrl-names = "default", "sleep";
+	status = "okay";
+};
+
+&cci0_i2c0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	wsgpio: gpio@45 {
+		compatible = "waveshare,dsi-touch-gpio";
+		reg = <0x45>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	touchscreen@5d {
+		compatible = "goodix,gt9271";
+		reg = <0x5d>;
+		reset-gpios = <&wsgpio 9 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+&hdmi_connector {
+	status = "disabled";
+};
+
+&hdmi_mi2s_playback_dai_link {
+	status = "disabled";
+};
+
+&mdss_dsi0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	panel@0 {
+		compatible = "waveshare,8.0-dsi-touch-a", "jadard,jd9365da-h3";
+		reg = <0>;
+		backlight = <&wsgpio>;
+		reset-gpios = <&wsgpio 1 GPIO_ACTIVE_LOW>;
+		vccio-supply = <&panel_iovcc>;
+		vdd-supply = <&panel_avdd>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&mdss_dsi0_out>;
+			};
+		};
+	};
+};
+
+&mdss_dsi0_out {
+	remote-endpoint = <&panel_in>;
+};
diff --git a/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts b/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
index 9ac2a04b302d..f518db091092 100644
--- a/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
+++ b/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
@@ -51,7 +51,7 @@ button-home {
 		};
 	};
 
-	hdmi-connector {
+	hdmi_connector: hdmi-connector {
 		compatible = "hdmi-connector";
 		label = "hdmi";
 		type = "a";
@@ -113,7 +113,7 @@ platform {
 			};
 		};
 
-		hdmi-mi2s-playback-dai-link {
+		hdmi_mi2s_playback_dai_link: hdmi-mi2s-playback-dai-link {
 			link-name = "HDMI Playback";
 
 			codec {

---
base-commit: aaa2f954c21b205a0bcd0961e5b2be4e82e58455
change-id: 20261112-monza_waveshare_dtso-9f9934f7aa77

Best regards,
-- 
Vishnu Saini <vishnu.saini@oss.qualcomm.com>

Re: [PATCH v2] arm64: dts: qcom: monaco-arduino-monza: Add Waveshare 8" DSI touch overlay

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential
issue to consider:
- [High] arm64: dts: qcom: Makefile: monaco-el2.dtbo applied to non-EL2
  Waveshare DTB
--

commit fb42e57888d978dabeca7a2682d11658ae75d3e6
Author: Vishnu Saini <vishnu.saini@oss.qualcomm.com>

arm64: dts: qcom: monaco-arduino-monza: Add Waveshare 8" DSI touch overlay

This commit adds a device tree overlay to support the Waveshare 8" DSI
TOUCH-A display and touchscreen on the Qualcomm Monaco Arduino Monza
platform via the JMEDIA carrier card.

> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index 8329c06b60a3f..331ae62494e57 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -83,6 +83,11 @@ dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza.dtb
>  monaco-arduino-monza-el2-dtbs	:= monaco-arduino-monza.dtb monaco-el2.dtbo
>  
>  dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza-el2.dtb
> +
> +monaco-arduino-monza-waveshare-8-dsi-touch-a-dtbs	:= monaco-arduino-monza.dtb monaco-el2.dtbo monaco-arduino-monza-waveshare-8-dsi-touch-a.dtbo
> +dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza-waveshare-8-dsi-touch-a.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= monaco-arduino-monza-waveshare-8-dsi-touch-a.dtbo

[Severity: High]
Should monaco-arduino-monza-waveshare-8-dsi-touch-a-dtbs omit
monaco-el2.dtbo?

monaco-arduino-monza.dtb boots at EL1 under the Gunyah hypervisor by
default, whereas monaco-el2.dtbo is only for the explicit -el2 target.
Merging monaco-el2.dtbo into the non-EL2 composite DTB disables
gpu_zap_shader and iris and attaches EL2-only apps_smmu IOMMU stream
mappings to remoteproc_adsp, remoteproc_cdsp, and remoteproc_gpdsp:

arch/arm64/boot/dts/qcom/monaco-el2.dtso:
&gpu_zap_shader {
	status = "disabled";
};

&iris {
	status = "disabled";
};

&remoteproc_adsp {
	iommus = <&apps_smmu 0x2000 0x0>;
};

When booting monaco-arduino-monza-waveshare-8-dsi-touch-a.dtb in the
default EL1 mode, GPU zap shader loading and Iris video acceleration are
disabled and the direct IOMMU mappings on the remoteprocs conflict with
Gunyah PAS management.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20261114-monza_waveshare_dtso-v2-1-d35703f59832@oss.qualcomm.com?part=1