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From 6e1ccf7cfe1b758963743b88fa1b078b011c77b3 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Fri, 14 Apr 2023 13:57:52 +0100
Subject: [PATCH] dtoverlays: Add an overlay for the Waveshare DSI
screens
They come in varying sizes, but all have the same MCU for
power control and touch controller.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 28 ++++
.../vc4-kms-dsi-waveshare-panel-overlay.dts | 123 ++++++++++++++++++
3 files changed, 152 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/vc4-kms-dsi-waveshare-panel-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -272,6 +272,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
vc4-kms-dsi-7inch.dtbo \
vc4-kms-dsi-lt070me05000.dtbo \
vc4-kms-dsi-lt070me05000-v2.dtbo \
+ vc4-kms-dsi-waveshare-panel.dtbo \
vc4-kms-kippah-7inch.dtbo \
vc4-kms-v3d.dtbo \
vc4-kms-v3d-pi4.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -4493,6 +4493,34 @@ Load: dtoverlay=vc4-kms-dsi-lt070me050
Params: <None>
+Name: vc4-kms-dsi-waveshare-panel
+Info: Enable a Waveshare DSI touchscreen
+ Includes the Goodix driver for the touchscreen element.
+ The default is for the display to be using the I2C0 option for control.
+ Use the i2c1 override if using the I2C1 wiring with jumper wires from
+ GPIOs 2&3 (pins 3&5).
+ invx/invy/swapxy should be used with caution as the panel specifier will
+ set the default inversions for that panel. Always use them after the
+ panel specifier, and be aware that you may need to set them as =0, not
+ just adding it.
+ Requires vc4-kms-v3d to be loaded.
+Load: dtoverlay=vc4-kms-dsi-waveshare-panel,<param>=<val>
+Params: 2_8_inch 2.8" 480x640
+ 3_4_inch 3.4" 800x800 round
+ 4_0_inch 4.0" 480x800
+ 7_0_inchC 7.0" C 1024x600
+ 7_9_inch 7.9" 400x1280
+ 8_0_inch 8.0" 1280x800
+ 10_1_inch 10.1" 1280x800
+ 11_9_inch 11.9" 320x1480
+ i2c1 Use i2c-1 with jumper wires from GPIOs 2&3
+ disable_touch Disable the touch controller
+ rotation Set the panel orientation property
+ invx Touchscreen inverted x axis
+ invy Touchscreen inverted y axis
+ swapxy Touchscreen swapped x y axis
+
+
Name: vc4-kms-kippah-7inch
Info: This overlay is now deprecated - see vc4-kms-dpi-panel,kippah-7inch
Load: <Deprecated>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/vc4-kms-dsi-waveshare-panel-overlay.dts
@@ -0,0 +1,123 @@
+/*
+ * Device Tree overlay for Waveshare DSI Touchscreens
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&dsi1>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+ port {
+ dsi_out: endpoint {
+ remote-endpoint = <&panel_in>;
+ };
+ };
+ };
+ };
+
+ fragment@1 {
+ target-path = "/";
+ __overlay__ {
+ };
+ };
+
+ frag2: fragment@2 {
+ target = <&i2c_csi_dsi>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ panel: panel_disp1@45 {
+ reg = <0x45>;
+ compatible = "waveshare,10.1inch-panel";
+
+ port {
+ panel_in: endpoint {
+ remote-endpoint = <&dsi_out>;
+ };
+ };
+ };
+
+ touch: goodix@14 {
+ reg = <0x14>;
+ compatible = "goodix,gt911";
+ };
+ };
+ };
+
+ fragment@3 {
+ target = <&i2c0if>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@4 {
+ target = <&i2c0mux>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@5 {
+ target = <&i2c_arm>;
+ __dormant__ {
+ status = "okay";
+ };
+ };
+
+ __overrides__ {
+ 2_8_inch = <&panel>, "compatible=waveshare,2.8inch-panel",
+ <&touch>, "touchscreen-size-x:0=640",
+ <&touch>, "touchscreen-size-y:0=480",
+ <&touch>, "touchscreen-inverted-y?",
+ <&touch>, "touchscreen-swapped-x-y?";
+ 3_4_inch = <&panel>, "compatible=waveshare,3.4inch-panel",
+ <&touch>, "touchscreen-size-x:0=800",
+ <&touch>, "touchscreen-size-y:0=800";
+ 4_0_inch = <&panel>, "compatible=waveshare,4.0inch-panel",
+ <&touch>, "touchscreen-size-x:0=800",
+ <&touch>, "touchscreen-size-y:0=480",
+ <&touch>, "touchscreen-inverted-x?",
+ <&touch>, "touchscreen-swapped-x-y?";
+ 7_0_inchC = <&panel>, "compatible=waveshare,7.0inch-c-panel",
+ <&touch>, "touchscreen-size-x:0=800",
+ <&touch>, "touchscreen-size-y:0=480";
+ 7_9_inch = <&panel>, "compatible=waveshare,7.9inch-panel",
+ <&touch>, "touchscreen-size-x:0=400",
+ <&touch>, "touchscreen-size-y:0=1280",
+ <&touch>, "touchscreen-inverted-x?",
+ <&touch>, "touchscreen-inverted-y?";
+ 8_0_inch = <&panel>, "compatible=waveshare,8.0inch-panel",
+ <&touch>, "touchscreen-size-x:0=800",
+ <&touch>, "touchscreen-size-y:0=1280",
+ <&touch>, "touchscreen-inverted-x?",
+ <&touch>, "touchscreen-swapped-x-y?";
+ 10_1_inch = <&panel>, "compatible=waveshare,10.1inch-panel",
+ <&touch>, "touchscreen-size-x:0=800",
+ <&touch>, "touchscreen-size-y:0=1280",
+ <&touch>, "touchscreen-inverted-x?",
+ <&touch>, "touchscreen-swapped-x-y?";
+ 11_9_inch = <&panel>, "compatible=waveshare,11.9inch-panel",
+ <&touch>, "touchscreen-size-x:0=320",
+ <&touch>, "touchscreen-size-y:0=1480",
+ <&touch>, "touchscreen-inverted-x?",
+ <&touch>, "touchscreen-swapped-x-y?";
+ i2c1 = <&frag2>, "target:0=",<&i2c1>,
+ <0>, "-3-4+5";
+ disable_touch = <&touch>, "status=disabled";
+ rotation = <&panel>, "rotation:0";
+ invx = <&touch>,"touchscreen-inverted-x?";
+ invy = <&touch>,"touchscreen-inverted-y?";
+ swapxy = <&touch>,"touchscreen-swapped-x-y?";
+ };
+};
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