[PATCH v9 4/5] ARM: dts: stm32: add display support on stm32f769-disco

[Dario Binacchi]

The patch adds display support on the stm32f769-disco board.

Signed-off-by: Dario Binacchi <dario.binacchi at amarulasolutions.com>

---

Changes in v9:
- Rename panel-dsi at 0 to panel at 0 to fix yaml warnings

Changes in v8:
- Remove unit name from 'ltdc/port/endpoint at 0' to fix the compiling
  warning:
  ../arch/arm/boot/dts/st/stm32f769-disco.dts:189.28-191.5: Warning
  (unit_address_vs_reg): /soc/display-controller at 40016800/port/endpoint at 0: node
  has a unit name, but no reg or ranges property

 arch/arm/boot/dts/st/stm32f769-disco.dts | 72 +++++++++++++++++++++++-
 1 file changed, 71 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/st/stm32f769-disco.dts b/arch/arm/boot/dts/st/stm32f769-disco.dts
index 660f85984164..43479b0804c2 100644
--- a/arch/arm/boot/dts/st/stm32f769-disco.dts
+++ b/arch/arm/boot/dts/st/stm32f769-disco.dts
@@ -41,7 +41,7 @@
  */
 
 /dts-v1/;
-#include "stm32f746.dtsi"
+#include "stm32f769.dtsi"
 #include "stm32f769-pinctrl.dtsi"
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/gpio/gpio.h>
@@ -60,6 +60,19 @@ memory at c0000000 {
 		reg = <0xC0000000 0x1000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		linux,dma {
+			compatible = "shared-dma-pool";
+			linux,dma-default;
+			no-map;
+			size = <0x100000>;
+		};
+	};
+
 	aliases {
 		serial0 = &usart1;
 	};
@@ -85,6 +98,13 @@ button-0 {
 		};
 	};
 
+	panel_backlight: panel-backlight {
+		compatible = "gpio-backlight";
+		gpios = <&gpioi 14 GPIO_ACTIVE_HIGH>;
+		default-on;
+		status = "okay";
+	};
+
 	usbotg_hs_phy: usb-phy {
 		#phy-cells = <0>;
 		compatible = "usb-nop-xceiv";
@@ -114,6 +134,46 @@ &clk_hse {
 	clock-frequency = <25000000>;
 };
 
+&dsi {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port at 0 {
+			reg = <0>;
+			dsi_in: endpoint {
+				remote-endpoint = <&ltdc_out_dsi>;
+			};
+		};
+
+		port at 1 {
+			reg = <1>;
+			dsi_out: endpoint {
+				remote-endpoint = <&dsi_panel_in>;
+			};
+		};
+	};
+
+	panel0: panel at 0 {
+		compatible = "orisetech,otm8009a";
+		reg = <0>; /* dsi virtual channel (0..3) */
+		reset-gpios = <&gpioj 15 GPIO_ACTIVE_LOW>;
+		power-supply = <&vcc_3v3>;
+		backlight = <&panel_backlight>;
+		status = "okay";
+
+		port {
+			dsi_panel_in: endpoint {
+				remote-endpoint = <&dsi_out>;
+			};
+		};
+	};
+};
+
 &i2c1 {
 	pinctrl-0 = <&i2c1_pins_b>;
 	pinctrl-names = "default";
@@ -122,6 +182,16 @@ &i2c1 {
 	status = "okay";
 };
 
+&ltdc {
+	status = "okay";
+
+	port {
+		ltdc_out_dsi: endpoint {
+			remote-endpoint = <&dsi_in>;
+		};
+	};
+};
+
 &rtc {
 	status = "okay";
 };
-- 
2.43.0