[PATCH v2 0/2] Add initial device tree support for the Xiaomi Mi Box 4 (MDZ-21-AA), an Amlogic S905L based TV box.

[PATCH v2 0/2] Add initial device tree support for the Xiaomi Mi Box 4 (MDZ-21-AA), an Amlogic S905L based TV box.

[YuChia-Kan]

The series adds the board device tree and enables the main on-board hardware, including eMMC, RTL8723DS Wi-Fi, HDMI output, HDMI CEC, USB host, IR receiver, power LED, audio, Mali GPU and the Amlogic video decoder.

Bluetooth is currently not described in the device tree. The device firmware uses the H4 UART protocol, while the current mainline RTL8723DS Bluetooth support expects H5.

Tested:

* SMP (4 CPU cores)
* 2 GiB RAM
* eMMC
* RTL8723DS Wi-Fi
* HDMI output
* HDMI CEC
* USB 2.0 host
* Power LED
* Mali GPU
* Amlogic VDEC

Also verified that the sound card and IR input device are correctly registered.

Not tested:

* CVBS / analog AV output, due to lack of compatible test equipment

Signed-off-by: YuChia-Kan <raspberrykan@stu.hqu.edu.cn>
---
Changes in v2:
- Drop the LED label and use the standard color property.
- Drop the redundant Mali GPU definition inherited from the common DTSI.
- Document the custom Mi Box 4 efuse layout.
- Link to v1: https://patch.msgid.link/20260903-mibox4-dt-v1-0-f29f1e828ca3@stu.hqu.edu.cn

To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Neil Armstrong <neil.armstrong@linaro.org>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: Jerome Brunet <jbrunet@baylibre.com>
To: Kevin Hilman <khilman@baylibre.com>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-amlogic@lists.infradead.org

---
YuChia-Kan (2):
      dt-bindings: arm: amlogic: add Xiaomi Mi Box 4
      arm64: dts: amlogic: add Xiaomi Mi Box 4 support

 Documentation/devicetree/bindings/arm/amlogic.yaml |   1 +
 arch/arm64/boot/dts/amlogic/Makefile               |   1 +
 arch/arm64/boot/dts/amlogic/meson-gxlx-mibox4.dts  | 339 +++++++++++++++++++++
 3 files changed, 341 insertions(+)
---
base-commit: ae77d827fb0e6fb2faf8186f075c6c337f2dcf08
change-id: 20260903-mibox4-dt-f64044d040ad

Best regards,
--  
YuChia-Kan <raspberrykan@stu.hqu.edu.cn>

[PATCH v2 1/2] dt-bindings: arm: amlogic: add Xiaomi Mi Box 4

[YuChia-Kan]

Add the Xiaomi Mi Box 4 (MDZ-21-AA), based on the Amlogic S905L
SoC, to the list of supported Amlogic boards.

Signed-off-by: YuChia-Kan <raspberrykan@stu.hqu.edu.cn>
---
 Documentation/devicetree/bindings/arm/amlogic.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/arm/amlogic.yaml b/Documentation/devicetree/bindings/arm/amlogic.yaml
index 9f73a0054fb2..96e207572d98 100644
--- a/Documentation/devicetree/bindings/arm/amlogic.yaml
+++ b/Documentation/devicetree/bindings/arm/amlogic.yaml
@@ -120,6 +120,7 @@ properties:
         items:
           - enum:
               - amlogic,p271
+              - xiaomi,mibox4
           - const: amlogic,s905l
           - const: amlogic,meson-gxlx
 

-- 
2.53.0

[PATCH v2 2/2] arm64: dts: amlogic: add Xiaomi Mi Box 4 support

[YuChia-Kan]

Add initial device tree support for the Xiaomi Mi Box 4
(MDZ-21-AA), based on the Amlogic S905L SoC.

Enable the main on-board peripherals including eMMC, Wi-Fi,
HDMI, CEC, USB, IR, audio, power LED, GPU and video decoder.

Signed-off-by: YuChia-Kan <raspberrykan@stu.hqu.edu.cn>
---
 arch/arm64/boot/dts/amlogic/Makefile              |   1 +
 arch/arm64/boot/dts/amlogic/meson-gxlx-mibox4.dts | 339 ++++++++++++++++++++++
 2 files changed, 340 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
index 57bc440fa55c..9f357df5fc54 100644
--- a/arch/arm64/boot/dts/amlogic/Makefile
+++ b/arch/arm64/boot/dts/amlogic/Makefile
@@ -72,6 +72,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-nexbox-a95x.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-p212.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-vero4k.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxlx-s905l-p271.dtb
+dtb-$(CONFIG_ARCH_MESON) += meson-gxlx-mibox4.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-gt1-ultimate.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-khadas-vim2.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-mecool-kiii-pro.dtb
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxlx-mibox4.dts b/arch/arm64/boot/dts/amlogic/meson-gxlx-mibox4.dts
new file mode 100644
index 000000000000..e715eae823fe
--- /dev/null
+++ b/arch/arm64/boot/dts/amlogic/meson-gxlx-mibox4.dts
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+// Copyright (c) 2026 YuChia-Kan <mail@raspberrykan.dev>
+
+/dts-v1/;
+
+#include "meson-gxl-s905x.dtsi"
+
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/sound/meson-aiu.h>
+
+/ {
+	compatible = "xiaomi,mibox4", "amlogic,s905l", "amlogic,meson-gxlx";
+	model = "Xiaomi Mi Box 4 (MDZ-21-AA)";
+
+	aliases {
+		serial0 = &uart_AO;
+		mmc0 = &sd_emmc_c;
+		mmc1 = &sd_emmc_a;
+		/delete-property/ mmc2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	av_mute: analog-audio-mute {
+		compatible = "simple-audio-amplifier";
+		sound-name-prefix = "AV";
+		enable-gpios = <&gpio GPIOH_5 GPIO_ACTIVE_HIGH>;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x80000000>;
+	};
+
+	hdmi_connector: hdmi-connector {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&hdmi_tx_tmds_out>;
+			};
+		};
+	};
+
+	cvbs_connector: cvbs-connector {
+		compatible = "composite-video-connector";
+
+		port {
+			cvbs_connector_in: endpoint {
+				remote-endpoint = <&cvbs_vdac_out>;
+			};
+		};
+	};
+
+	hdmi_usb_5v: regulator-hdmi-usb-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "HDMI_USB_5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio_ao GPIOAO_4 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	vddio_boot: regulator-vddio-boot {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIO_BOOT";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	vddao_3v3: regulator-vddao-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDAO_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	vddio_ao18: regulator-vddio-ao18 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIO_AO18";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	vcc_3v3: regulator-vcc-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	emmc_pwrseq: emmc-pwrseq {
+		compatible = "mmc-pwrseq-emmc";
+		reset-gpios = <&gpio BOOT_9 GPIO_ACTIVE_LOW>;
+	};
+
+	wifi32k: wifi32k {
+		compatible = "pwm-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		pwms = <&pwm_ef 0 30518 0>;
+	};
+
+	wifi_pwrseq: wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio GPIOX_9 GPIO_ACTIVE_LOW>;
+		clocks = <&wifi32k>;
+		clock-names = "ext_clock";
+		post-power-on-delay-ms = <200>;
+	};
+
+	leds: leds {
+		compatible = "gpio-leds";
+
+		power_led: power-led {
+			color = <LED_COLOR_ID_WHITE>;
+			function = LED_FUNCTION_POWER;
+			gpios = <&gpio GPIOX_6 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+	};
+
+	sound {
+		compatible = "amlogic,gx-sound-card";
+		model = "Xiaomi-Mi-Box-4";
+		audio-aux-devs = <&av_mute>;
+		audio-widgets = "Line", "Lineout";
+		audio-routing = "AV INL", "ACODEC LOLN",
+				"AV INR", "ACODEC LORN",
+				"Lineout", "AV OUTL",
+				"Lineout", "AV OUTR";
+
+		clocks = <&clkc CLKID_MPLL0>,
+			 <&clkc CLKID_MPLL1>,
+			 <&clkc CLKID_MPLL2>;
+		assigned-clocks = <&clkc CLKID_MPLL0>,
+				  <&clkc CLKID_MPLL1>,
+				  <&clkc CLKID_MPLL2>;
+		assigned-clock-rates = <294912000>, <270950400>, <393216000>;
+
+		dai-link-0 {
+			sound-dai = <&aiu AIU_CPU CPU_I2S_FIFO>;
+		};
+
+		dai-link-1 {
+			sound-dai = <&aiu AIU_CPU CPU_I2S_ENCODER>;
+			dai-format = "i2s";
+			mclk-fs = <256>;
+
+			codec-0 {
+				sound-dai = <&aiu AIU_HDMI CTRL_I2S>;
+			};
+
+			codec-1 {
+				sound-dai = <&aiu AIU_ACODEC CTRL_I2S>;
+			};
+		};
+
+		dai-link-2 {
+			sound-dai = <&aiu AIU_HDMI CTRL_OUT>;
+
+			codec-0 {
+				sound-dai = <&hdmi_tx>;
+			};
+		};
+
+		dai-link-3 {
+			sound-dai = <&aiu AIU_ACODEC CTRL_OUT>;
+
+			codec-0 {
+				sound-dai = <&acodec>;
+			};
+		};
+	};
+};
+
+&acodec {
+	AVDD-supply = <&vddio_ao18>;
+	status = "okay";
+};
+
+&aiu {
+	status = "okay";
+};
+
+&cec_AO {
+	status = "okay";
+	pinctrl-0 = <&ao_cec_pins>;
+	pinctrl-names = "default";
+	hdmi-phandle = <&hdmi_tx>;
+};
+
+&cvbs_vdac_port {
+	cvbs_vdac_out: endpoint {
+		remote-endpoint = <&cvbs_connector_in>;
+	};
+};
+
+/*
+ * The Mi Box 4 uses a custom efuse layout extracted from the
+ * original firmware.
+ */
+
+/delete-node/ &eth_mac;
+/delete-node/ &sn;
+/delete-node/ &bid;
+
+&efuse {
+	eth_mac: mac-address@0 {
+		reg = <0x00 0x06>;
+	};
+
+	bt_mac: mac-address@6 {
+		reg = <0x06 0x06>;
+	};
+
+	wifi_mac: mac-address@c {
+		reg = <0x0c 0x06>;
+	};
+
+	usid: serial-number@12 {
+		reg = <0x12 0x10>;
+	};
+};
+
+&ethmac {
+	status = "disabled";
+};
+
+&hdmi_tx {
+	status = "okay";
+	pinctrl-0 = <&hdmi_hpd_pins>, <&hdmi_i2c_pins>;
+	pinctrl-names = "default";
+	hdmi-supply = <&hdmi_usb_5v>;
+};
+
+&hdmi_tx_tmds_port {
+	hdmi_tx_tmds_out: endpoint {
+		remote-endpoint = <&hdmi_connector_in>;
+	};
+};
+
+&ir {
+	status = "okay";
+	pinctrl-0 = <&remote_input_ao_pins>;
+	pinctrl-names = "default";
+};
+
+&pwm_ef {
+	status = "okay";
+	pinctrl-0 = <&pwm_e_pins>;
+	pinctrl-names = "default";
+};
+
+&saradc {
+	compatible = "amlogic,meson-gxlx-saradc", "amlogic,meson-saradc";
+	status = "okay";
+	vref-supply = <&vddio_ao18>;
+};
+
+&sd_emmc_a {
+	status = "okay";
+	pinctrl-0 = <&sdio_pins>;
+	pinctrl-1 = <&sdio_clk_gate_pins>;
+	pinctrl-names = "default", "clk-gate";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	bus-width = <4>;
+	cap-sd-highspeed;
+	cap-sdio-irq;
+	max-frequency = <50000000>;
+	non-removable;
+	no-mmc;
+	no-sd;
+	disable-wp;
+	keep-power-in-suspend;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	vmmc-supply = <&vddao_3v3>;
+	vqmmc-supply = <&vddio_boot>;
+
+	rtl8723ds: wifi@1 {
+		reg = <1>;
+		nvmem-cells = <&wifi_mac>;
+		nvmem-cell-names = "mac-address";
+		interrupt-parent = <&gpio_intc>;
+		interrupts = <GPIOX_7 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "host-wake";
+	};
+};
+
+&sd_emmc_b {
+	status = "disabled";
+};
+
+&sd_emmc_c {
+	status = "okay";
+	pinctrl-0 = <&emmc_pins>, <&emmc_ds_pins>;
+	pinctrl-1 = <&emmc_clk_gate_pins>;
+	pinctrl-names = "default", "clk-gate";
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	max-frequency = <100000000>;
+	non-removable;
+	disable-wp;
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
+	mmc-pwrseq = <&emmc_pwrseq>;
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vddio_boot>;
+};
+
+&uart_AO {
+	status = "okay";
+	pinctrl-0 = <&uart_ao_a_pins>;
+	pinctrl-names = "default";
+};
+
+&usb {
+	status = "okay";
+	dr_mode = "host";
+};
+
+&usb2_phy0 {
+	phy-supply = <&hdmi_usb_5v>;
+};
+
+&vdec {
+	compatible = "amlogic,gxlx-vdec", "amlogic,gx-vdec";
+};

-- 
2.53.0

Re: [PATCH v2 2/2] arm64: dts: amlogic: add Xiaomi Mi Box 4 support

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] Makefile entries are not alphabetically sorted.
--

commit 70cc330a6bc43bd5cfd305fe463356587a2e4a7d
Author: YuChia-Kan <raspberrykan@stu.hqu.edu.cn>

arm64: dts: amlogic: add Xiaomi Mi Box 4 support

This patch adds initial device tree support for the Xiaomi Mi Box 4, which is
based on the Amlogic S905L SoC. It enables the main on-board peripherals
including eMMC, Wi-Fi, HDMI, USB, and audio.

> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index 57bc440fa55cc..9f357df5fc54e 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -72,6 +72,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-nexbox-a95x.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-p212.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-vero4k.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxlx-s905l-p271.dtb
> +dtb-$(CONFIG_ARCH_MESON) += meson-gxlx-mibox4.dtb

[Severity: Low]
Does this break the alphabetical sorting of the dtb list? It looks like
meson-gxlx-mibox4.dtb should be inserted before meson-gxlx-s905l-p271.dtb to
maintain the correct order in the Makefile.

[ ... ]

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260903-mibox4-dt-v2-0-fbe7c04472a7@stu.hqu.edu.cn?part=2

Re: [PATCH v2 2/2] arm64: dts: amlogic: add Xiaomi Mi Box 4 support

[neil.armstrong]

On 9/3/26 10:59, sashiko-bot@kernel.org wrote:
> Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> - [Low] Makefile entries are not alphabetically sorted.
> --
> 
> commit 70cc330a6bc43bd5cfd305fe463356587a2e4a7d
> Author: YuChia-Kan <raspberrykan@stu.hqu.edu.cn>
> 
> arm64: dts: amlogic: add Xiaomi Mi Box 4 support
> 
> This patch adds initial device tree support for the Xiaomi Mi Box 4, which is
> based on the Amlogic S905L SoC. It enables the main on-board peripherals
> including eMMC, Wi-Fi, HDMI, USB, and audio.
> 
>> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
>> index 57bc440fa55cc..9f357df5fc54e 100644
>> --- a/arch/arm64/boot/dts/amlogic/Makefile
>> +++ b/arch/arm64/boot/dts/amlogic/Makefile
>> @@ -72,6 +72,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-nexbox-a95x.dtb
>>   dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-p212.dtb
>>   dtb-$(CONFIG_ARCH_MESON) += meson-gxl-s905x-vero4k.dtb
>>   dtb-$(CONFIG_ARCH_MESON) += meson-gxlx-s905l-p271.dtb
>> +dtb-$(CONFIG_ARCH_MESON) += meson-gxlx-mibox4.dtb
> 
> [Severity: Low]
> Does this break the alphabetical sorting of the dtb list? It looks like
> meson-gxlx-mibox4.dtb should be inserted before meson-gxlx-s905l-p271.dtb to
> maintain the correct order in the Makefile.

And the name should probably align with the other dt names and align with the aquaman name (meson-gxl-s805y-xiaomi-aquaman.dts):

meson-gxlx-s905l-xiami-mibox4

Neil

> 
> [ ... ]
>