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overlays: Rebuild 5inch display from the 7inch

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Reimplement the vc4-kms-dsi-ili9881-5inch display overlay by applying a
few changes to the vc4-kms-dsi-ili9881-7inch version. In doing so, it
inherits the rotation parameter that was previously absent, which then
needs documenting.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
This commit is contained in:
Phil Elwell
2025-08-26 14:13:09 +01:00
parent f63cbc6a4e
commit b07d612aae
2 changed files with 9 additions and 116 deletions
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1
arch/arm/boot/dts/overlays/README
View File

@@ -5595,6 +5595,7 @@ Params: sizex Touchscreen size x (default 720)
invy Touchscreen inverted y axis
swapxy Touchscreen swapped x y axis
disable_touch Disables the touch screen overlay driver
rotation Display rotation {0,90,180,270} (default 0)
dsi0 Use DSI0 and i2c_csi_dsi0 (rather than
the default DSI1 and i2c_csi_dsi).

114
arch/arm/boot/dts/overlays/vc4-kms-dsi-ili9881-5inch-overlay.dts
View File

@@ -2,121 +2,13 @@
* vc4-kms-dsi-ili9881-5inch-overlay.dts
*/
/dts-v1/;
/plugin/;
#include "vc4-kms-dsi-ili9881-7inch-overlay.dts"
#include <dt-bindings/gpio/gpio.h>
/ {
compatible = "brcm,bcm2835";
i2c_frag: fragment@0 {
target = <&i2c_csi_dsi>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
display_mcu: display_mcu@45
{
compatible = "raspberrypi,v2-touchscreen-panel-regulator";
reg = <0x45>;
gpio-controller;
#gpio-cells = <2>;
};
gt911: gt911@5d {
compatible = "goodix,gt911";
reg = <0x5d>;
AVDD28-supply = <&touch_reg>;
touchscreen-size-x = <720>;
touchscreen-size-y = <1280>;
&gt911 {
touchscreen-x-mm = <62>;
touchscreen-y-mm = <110>;
};
};
};
dsi_frag: fragment@1 {
target = <&dsi1>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
port {
dsi_out: endpoint {
remote-endpoint = <&panel_in>;
};
};
dsi_panel: dsi_panel@0 {
reg = <0>;
&dsi_panel {
compatible = "raspberrypi,dsi-5inch";
reset-gpio = <&display_mcu 0 GPIO_ACTIVE_LOW>;
backlight = <&display_mcu>;
port {
panel_in: endpoint {
remote-endpoint = <&dsi_out>;
};
};
};
};
};
fragment@2 {
target = <&i2c0if>;
__overlay__ {
status = "okay";
};
};
fragment@3 {
target = <&i2c0mux>;
__overlay__ {
status = "okay";
};
};
fragment@4 {
target-path = "/";
__overlay__ {
touch_reg: touch_reg@1 {
reg = <1>;
compatible = "regulator-fixed";
regulator-name = "touch_reg_1";
gpio = <&display_mcu 1 GPIO_ACTIVE_HIGH>;
startup-delay-us = <50000>;
enable-active-high;
};
};
};
fragment@10 {
target = <&gt911>;
__dormant__ {
touchscreen-inverted-x;
};
};
fragment@11 {
target = <&gt911>;
__dormant__ {
touchscreen-inverted-y;
};
};
__overrides__ {
dsi0 = <&dsi_frag>, "target:0=",<&dsi0>,
<&i2c_frag>, "target:0=",<&i2c_csi_dsi0>,
<&touch_reg>, "reg:0=0",
<&touch_reg>, "regulator-name=touch_reg_0";
sizex = <&gt911>,"touchscreen-size-x:0";
sizey = <&gt911>,"touchscreen-size-y:0";
invx = <0>, "+10";
invy = <0>, "+11";
swapxy = <&gt911>,"touchscreen-swapped-x-y?";
disable_touch = <&gt911>, "status=disabled";
};
};