openwrt/target/linux/bcm27xx/patches-6.1/950-0835-dtoverlays-Add-drm-option-to-piscreen-overlay.patch

From 5e54398e1b61335883dff1be46a6c8b3ca973926 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Wed, 30 Aug 2023 18:03:37 +0100
Subject: [PATCH] dtoverlays: Add drm option to piscreen overlay

Adds the option of selecting the DRM/KMS TinyDRM driver for
this panel, rather than the deprecated FBTFT one.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 arch/arm/boot/dts/overlays/README               |  3 +++
 arch/arm/boot/dts/overlays/piscreen-overlay.dts | 10 +++++++---
 2 files changed, 10 insertions(+), 3 deletions(-)

--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -3245,6 +3245,9 @@ Params: speed                   Display
 
         xohms                   Touchpanel sensitivity (X-plate resistance)
 
+        drm                     Select the DRM/KMS driver instead of the FBTFT
+                                one
+
 
 Name:   piscreen2r
 Info:   PiScreen 2 with resistive TP display by OzzMaker.com
--- a/arch/arm/boot/dts/overlays/piscreen-overlay.dts
+++ b/arch/arm/boot/dts/overlays/piscreen-overlay.dts
@@ -6,6 +6,8 @@
 /dts-v1/;
 /plugin/;
 
+#include <dt-bindings/gpio/gpio.h>
+
 / {
 	compatible = "brcm,bcm2835";
 
@@ -59,9 +61,9 @@
 				fps = <30>;
 				buswidth = <8>;
 				regwidth = <16>;
-				reset-gpios = <&gpio 25 1>;
-				dc-gpios = <&gpio 24 0>;
-				led-gpios = <&gpio 22 0>;
+				reset-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;
+				dc-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
+				led-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
 				debug = <0>;
 
 				init = <0x10000b0 0x00
@@ -98,5 +100,7 @@
 		fps =		<&piscreen>,"fps:0";
 		debug =		<&piscreen>,"debug:0";
 		xohms =		<&piscreen_ts>,"ti,x-plate-ohms;0";
+		drm =		<&piscreen>,"compatible=waveshare,rpi-lcd-35",
+				<&piscreen>,"reset-gpios:8=",<GPIO_ACTIVE_HIGH>;
 	};
 };