Add device tree overlays for the Raspberry Pi 5-inch and 7-inch MIPI-DSI panels (ILI9881C) on the Raspberry Pi 4 Model B.
Both panels share the same I2C-connected display MCU at 0x45 on i2c0_1, which provides GPIO and PWM for reset and backlight control. The common parts are in a shared dtsi. Each panel overlay includes it and adds only the panel-specific compatible string, physical dimensions, and timing. Signed-off-by: Maxime Ripard <[email protected]> --- arch/arm64/boot/dts/broadcom/Makefile | 8 +++ .../bcm2711-rpi-4-b-dsi-ili9881-5inch.dtso | 22 ++++++++ .../bcm2711-rpi-4-b-dsi-ili9881-7inch.dtso | 22 ++++++++ .../dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881.dtsi | 65 ++++++++++++++++++++++ 4 files changed, 117 insertions(+) diff --git a/arch/arm64/boot/dts/broadcom/Makefile b/arch/arm64/boot/dts/broadcom/Makefile index 01ecfa304184..d717dc8c4071 100644 --- a/arch/arm64/boot/dts/broadcom/Makefile +++ b/arch/arm64/boot/dts/broadcom/Makefile @@ -13,8 +13,16 @@ dtb-$(CONFIG_ARCH_BCM2835) += bcm2711-rpi-400.dtb \ bcm2837-rpi-3-b.dtb \ bcm2837-rpi-3-b-plus.dtb \ bcm2837-rpi-cm3-io3.dtb \ bcm2837-rpi-zero-2-w.dtb +dtb-$(CONFIG_ARCH_BCM2835) += bcm2711-rpi-4-b-dsi-ili9881-5inch.dtb +bcm2711-rpi-4-b-dsi-ili9881-5inch-dtbs := bcm2711-rpi-4-b.dtb \ + bcm2711-rpi-4-b-dsi-ili9881-5inch.dtbo + +dtb-$(CONFIG_ARCH_BCM2835) += bcm2711-rpi-4-b-dsi-ili9881-7inch.dtb +bcm2711-rpi-4-b-dsi-ili9881-7inch-dtbs := bcm2711-rpi-4-b.dtb \ + bcm2711-rpi-4-b-dsi-ili9881-7inch.dtbo + subdir-y += bcmbca subdir-y += northstar2 subdir-y += stingray diff --git a/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881-5inch.dtso b/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881-5inch.dtso new file mode 100644 index 000000000000..99aac1105ac6 --- /dev/null +++ b/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881-5inch.dtso @@ -0,0 +1,22 @@ +/dts-v1/; +/plugin/; + +#include "bcm2711-rpi-4-b-dsi-ili9881.dtsi" + +&panel { + compatible = "raspberrypi,dsi-5inch", "panel-mipi-dsi-bpf"; + width-mm = <62>; + height-mm = <110>; + + panel-timing { + clock-frequency = <83333000>; + hactive = <720>; + vactive = <1280>; + hfront-porch = <110>; + hsync-len = <12>; + hback-porch = <95>; + vfront-porch = <100>; + vsync-len = <2>; + vback-porch = <100>; + }; +}; diff --git a/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881-7inch.dtso b/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881-7inch.dtso new file mode 100644 index 000000000000..809d9b354b89 --- /dev/null +++ b/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881-7inch.dtso @@ -0,0 +1,22 @@ +/dts-v1/; +/plugin/; + +#include "bcm2711-rpi-4-b-dsi-ili9881.dtsi" + +&panel { + compatible = "raspberrypi,dsi-7inch", "panel-mipi-dsi-bpf"; + width-mm = <90>; + height-mm = <151>; + + panel-timing { + clock-frequency = <83330000>; + hactive = <720>; + vactive = <1280>; + hfront-porch = <239>; + hsync-len = <33>; + hback-porch = <50>; + vfront-porch = <20>; + vsync-len = <2>; + vback-porch = <30>; + }; +}; diff --git a/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881.dtsi b/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881.dtsi new file mode 100644 index 000000000000..bd08e22581a3 --- /dev/null +++ b/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b-dsi-ili9881.dtsi @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Common DSI infrastructure for Raspberry Pi ILI9881C panels + * (backlight, i2c mux, display MCU, DSI1 port wiring) + * + * Each panel overlay includes this and extends &panel with its own + * compatible, dimensions, and panel-timing. + */ + +#include <dt-bindings/gpio/gpio.h> + +&{/} { + panel_backlight: panel_backlight { + compatible = "pwm-backlight"; + brightness-levels = <0 31>; + num-interpolated-steps = <31>; + default-brightness-level = <15>; + pwms = <&display_mcu 0 200000 0>; + }; +}; + +&i2c0 { + status = "okay"; +}; + +&i2c0mux { + status = "okay"; +}; + +&i2c0_1 { + status = "okay"; + + display_mcu: display_mcu@45 { + compatible = "raspberrypi,touchscreen-panel-regulator-v2"; + reg = <0x45>; + gpio-controller; + #gpio-cells = <2>; + #pwm-cells = <3>; + }; +}; + +&dsi1 { + status = "okay"; + + panel: panel@0 { + reg = <0>; + reset-gpios = <&display_mcu 0 GPIO_ACTIVE_LOW>; + backlight = <&panel_backlight>; + dsi-lanes = <2>; + mode-video; + mode-lpm; + + port { + panel_in: endpoint { + remote-endpoint = <&dsi1_out>; + }; + }; + }; + + port { + dsi1_out: endpoint { + remote-endpoint = <&panel_in>; + }; + }; +}; -- 2.55.0
