[PATCH v2 0/2] mt8395-radxa-nio-12l: Add overlay for Radxa 8HD panel

[PATCH v2 0/2] mt8395-radxa-nio-12l: Add overlay for Radxa 8HD panel

[Julien Massot]

Hi,
small series to enable a DSI panel on Radxa NIO 12L.

The first patch adds missing dts nodes to expose some
feature of the DSI0 port.

The second patch adds the Radxa 8 HD panel as an overlay.

Tested on top of linux-next tag:next-20250303

Signed-off-by: Julien Massot <julien.massot@collabora.com>
---
Changes in v2:
- Moved video pipeline enablement to the overlay (ovl0, vdosys0)
- Keep backlight disabled in the board dts, enabled in the panel overlay
- Test again on Linux next-20250303
- Link to v1: https://lore.kernel.org/r/20250226-radxa-panel-overlay-v1-0-9e8938dfbead@collabora.com

---
Julien Massot (2):
      arm64: dts: mediatek: mt8395-nio-12l: Prepare MIPI DSI port
      arm64: dts: mediatek: mt8395-radxa-nio-12l: Add Radxa 8 HD panel

 arch/arm64/boot/dts/mediatek/Makefile              |  2 +
 .../mediatek/mt8395-radxa-nio-12l-8-hd-panel.dtso  | 84 ++++++++++++++++++++++
 .../boot/dts/mediatek/mt8395-radxa-nio-12l.dts     | 45 ++++++++++++
 3 files changed, 131 insertions(+)
---
base-commit: cd3215bbcb9d4321def93fea6cfad4d5b42b9d1d
change-id: 20250226-radxa-panel-overlay-5424db95995c

Best regards,
-- 
Julien Massot <julien.massot@collabora.com>

[PATCH v2 1/2] arm64: dts: mediatek: mt8395-nio-12l: Prepare MIPI DSI port

[Julien Massot]

This board can use a MIPI-DSI panel on the DSI0 connector: in
preparation for adding an overlay for the Radxa Display 8HD,
add the backlight, and some definitions for pins available
through the DSI0 port.

Signed-off-by: Julien Massot <julien.massot@collabora.com>
---
 .../boot/dts/mediatek/mt8395-radxa-nio-12l.dts     | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts b/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
index 7184dc99296c7f5d749c7e6d378722677970b3b7..1c922e98441a1aadf0aa3cdd76583a70401a1fa3 100644
--- a/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
@@ -48,6 +48,18 @@ memory@40000000 {
 		reg = <0 0x40000000 0x1 0x0>;
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 1023>;
+		default-brightness-level = <576>;
+		enable-gpios = <&pio 107 GPIO_ACTIVE_HIGH>;
+		num-interpolated-steps = <1023>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&dsi0_backlight_pins>;
+		pwms = <&disp_pwm0 0 500000>;
+		status = "disabled";
+	};
+
 	wifi_vreg: regulator-wifi-3v3-en {
 		compatible = "regulator-fixed";
 		regulator-name = "wifi_3v3_en";
@@ -502,6 +514,13 @@ &mt6359_vsram_others_ldo_reg {
 &pio {
 	mediatek,rsel-resistance-in-si-unit;
 
+	dsi0_backlight_pins: dsi0-backlight-pins {
+		pins-backlight-en {
+			pinmux = <PINMUX_GPIO107__FUNC_GPIO107>;
+			output-high;
+		};
+	};
+
 	eth_default_pins: eth-default-pins {
 		pins-cc {
 			pinmux = <PINMUX_GPIO85__FUNC_GBE_TXC>,
@@ -699,6 +718,13 @@ pins-irq {
 		};
 	};
 
+	panel_default_pins: panel-pins {
+		pins-rst {
+			pinmux = <PINMUX_GPIO108__FUNC_GPIO108>;
+			bias-pull-up;
+		};
+	};
+
 	pcie0_default_pins: pcie0-default-pins {
 		pins-bus {
 			pinmux = <PINMUX_GPIO19__FUNC_WAKEN>,
@@ -717,6 +743,12 @@ pins-bus {
 		};
 	};
 
+	pwm0_default_pins: pwm0-pins {
+		pins-disp-pwm {
+			pinmux = <PINMUX_GPIO97__FUNC_DISP_PWM0>;
+		};
+	};
+
 	spi1_pins: spi1-default-pins {
 		pins-bus {
 			pinmux = <PINMUX_GPIO136__FUNC_SPIM1_CSB>,
@@ -737,6 +769,19 @@ pins-bus {
 		};
 	};
 
+	touch_pins: touch-pins {
+		pins-touch-int {
+			pinmux = <PINMUX_GPIO132__FUNC_GPIO132>;
+			input-enable;
+			bias-disable;
+		};
+
+		pins-touch-rst {
+			pinmux = <PINMUX_GPIO133__FUNC_GPIO133>;
+			output-high;
+		};
+	};
+
 	uart0_pins: uart0-pins {
 		pins-bus {
 			pinmux = <PINMUX_GPIO98__FUNC_UTXD0>,

-- 
2.48.1

[PATCH v2 2/2] arm64: dts: mediatek: mt8395-radxa-nio-12l: Add Radxa 8 HD panel

[Julien Massot]

The Radxa 8 HD touchscreen can be used with various Radxa board
and is sold appart from the Radxa NIO 12L development kit.

Add a DTS overlay for this panel.

Signed-off-by: Julien Massot <julien.massot@collabora.com>
---
 arch/arm64/boot/dts/mediatek/Makefile              |  2 +
 .../mediatek/mt8395-radxa-nio-12l-8-hd-panel.dtso  | 84 ++++++++++++++++++++++
 2 files changed, 86 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
index ae1147eca9a915f117487101e2ad4acead97adfe..58484e8300632edbdef24bbda33ccf00db9df937 100644
--- a/arch/arm64/boot/dts/mediatek/Makefile
+++ b/arch/arm64/boot/dts/mediatek/Makefile
@@ -100,9 +100,11 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-genio-1200-evk.dtb
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt8390-genio-700-evk.dtb
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-kontron-3-5-sbc-i1200.dtb
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-radxa-nio-12l.dtb
+dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-radxa-nio-12l-8-hd-panel.dtbo
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt8516-pumpkin.dtb
 
 # Device tree overlays support
 DTC_FLAGS_mt7986a-bananapi-bpi-r3 := -@
 DTC_FLAGS_mt7986a-bananapi-bpi-r3-mini := -@
 DTC_FLAGS_mt7988a-bananapi-bpi-r4 := -@
+DTC_FLAGS_mt8395-radxa-nio-12l := -@
diff --git a/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l-8-hd-panel.dtso b/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l-8-hd-panel.dtso
new file mode 100644
index 0000000000000000000000000000000000000000..0389c9cb8581c0bb50bb38fd35d1190de13feb6e
--- /dev/null
+++ b/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l-8-hd-panel.dtso
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Radxa Display 8 HD touchscreen module
+ * Copyright (C) 2025 Collabora Ltd.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+&backlight {
+	status = "okay";
+};
+
+&disp_pwm0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm0_default_pins>;
+	status = "okay";
+};
+
+&dsi0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	panel@0 {
+		compatible = "radxa,display-8hd-ad002", "jadard,jd9365da-h3";
+		reg = <0>;
+		backlight = <&backlight>;
+		vdd-supply = <&mt6359_vcn33_2_bt_ldo_reg>;
+		vccio-supply = <&mt6360_ldo2>;
+		reset-gpios = <&pio 108 GPIO_ACTIVE_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&panel_default_pins>;
+
+		port {
+			dsi_panel_in: endpoint {
+				remote-endpoint = <&dsi0_out>;
+			};
+		};
+	};
+};
+
+&dsi0_out {
+	remote-endpoint = <&dsi_panel_in>;
+};
+
+&i2c4 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	touchscreen@14 {
+		compatible = "goodix,gt911";
+		reg = <0x14>;
+		interrupts-extended = <&pio 132 IRQ_TYPE_EDGE_RISING>;
+		irq-gpios = <&pio 132 GPIO_ACTIVE_HIGH>;
+		reset-gpios = <&pio 133 GPIO_ACTIVE_HIGH>;
+		VDDIO-supply = <&mt6359_vcn33_2_bt_ldo_reg>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&touch_pins>;
+	};
+};
+
+&mipi_tx0 {
+	status = "okay";
+};
+
+&ovl0_in {
+	remote-endpoint = <&vdosys0_ep_main>;
+};
+
+&vdosys0 {
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		vdosys0_ep_main: endpoint@0 {
+			reg = <0>;
+			remote-endpoint = <&ovl0_in>;
+		};
+	};
+};

-- 
2.48.1

Re: [PATCH v2 2/2] arm64: dts: mediatek: mt8395-radxa-nio-12l: Add Radxa 8 HD panel

[AngeloGioacchino Del Regno]

Il 04/03/25 15:01, Julien Massot ha scritto:
> The Radxa 8 HD touchscreen can be used with various Radxa board
> and is sold appart from the Radxa NIO 12L development kit.
> 
> Add a DTS overlay for this panel.
> 
> Signed-off-by: Julien Massot <julien.massot@collabora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Re: [PATCH v2 1/2] arm64: dts: mediatek: mt8395-nio-12l: Prepare MIPI DSI port

[AngeloGioacchino Del Regno]

Il 04/03/25 15:01, Julien Massot ha scritto:
> This board can use a MIPI-DSI panel on the DSI0 connector: in
> preparation for adding an overlay for the Radxa Display 8HD,
> add the backlight, and some definitions for pins available
> through the DSI0 port.
> 
> Signed-off-by: Julien Massot <julien.massot@collabora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Re: [PATCH v2 0/2] mt8395-radxa-nio-12l: Add overlay for Radxa 8HD panel

[AngeloGioacchino Del Regno]

On Tue, 04 Mar 2025 15:01:54 +0100, Julien Massot wrote:
> small series to enable a DSI panel on Radxa NIO 12L.
> 
> The first patch adds missing dts nodes to expose some
> feature of the DSI0 port.
> 
> The second patch adds the Radxa 8 HD panel as an overlay.
> 
> [...]

Applied to v6.14-next/dts64, thanks!

[1/2] arm64: dts: mediatek: mt8395-nio-12l: Prepare MIPI DSI port
      commit: d4642e25bede20135d84e0ffdc234b72aaa1b6ba
[2/2] arm64: dts: mediatek: mt8395-radxa-nio-12l: Add Radxa 8 HD panel
      commit: 052cb5d105721a1bb517d278a005b0a100d27a62

Cheers,
Angelo