boards: arm: stm32h750b_dk: add support for display

ltdc devicetree definition

Signed-off-by: Toon Stegen <[email protected]>

Author: toonst

boards/arm/stm32h750b_dk/Kconfig.defconfig

@@ -8,4 +8,13 @@ if BOARD_STM32H750B_DK
 config BOARD
 	default "stm32h750b_dk"
 
+if DISPLAY
+
+# MEMC needs to be enabled in order to store
+# display buffer to external SDRAM connected to FMC
+config MEMC
+	default y
+
+endif # DISPLAY
+
 endif # BOARD_STM32H750B_DK

boards/arm/stm32h750b_dk/stm32h750b_dk.dts

@@ -19,6 +19,7 @@
 		zephyr,sram = &sram0;
 		zephyr,flash = &flash0;
 		zephyr,flash-controller = &mt25ql512ab1;
+		zephyr,display = &ltdc;
 	};
 
 	sdram1: sdram@c0000000 {
@@ -165,3 +166,38 @@
 		};
 	};
 };
+
+&ltdc {
+	pinctrl-0 = <&ltdc_r0_pi15 &ltdc_r1_pj0 &ltdc_r2_pj1 &ltdc_r3_ph9
+		&ltdc_r4_pj3 &ltdc_r5_pj4 &ltdc_r6_pj5 &ltdc_r7_pj6
+		&ltdc_g0_pj7 &ltdc_g1_pj8 &ltdc_g2_pj9 &ltdc_g3_pj10
+		&ltdc_g4_pj11 &ltdc_g5_pi0 &ltdc_g6_pi1 &ltdc_g7_pk2
+		&ltdc_b0_pj12 &ltdc_b1_pj13 &ltdc_b2_pj14 &ltdc_b3_pj15
+		&ltdc_b4_pk3 &ltdc_b5_pk4 &ltdc_b6_pk5 &ltdc_b7_pk6
+		&ltdc_de_pk7 &ltdc_clk_pi14 &ltdc_hsync_pi12 &ltdc_vsync_pi9>;
+	pinctrl-names = "default";
+	/* disp-on-gpios = <&gpioi 12 GPIO_ACTIVE_HIGH>; */
+	/* bl-ctrl-gpios = <&gpiok 3 GPIO_ACTIVE_HIGH>; */
+	ext-sdram = <&sdram1>;
+	status = "okay";
+
+	width = <480>;
+	height = <272>;
+	pixel-format = <PANEL_PIXEL_FORMAT_RGB_565>;
+	display-timings {
+		compatible = "zephyr,panel-timing";
+		de-active = <0>;
+		pixelclk-active = <0>;
+		hsync-active = <0>;
+		vsync-active = <0>;
+		hsync-len = <1>;
+		vsync-len = <10>;
+		hback-porch = <43>;
+		vback-porch = <12>;
+		hfront-porch = <8>;
+		vfront-porch = <4>;
+	};
+	def-back-color-red = <0xFF>;
+	def-back-color-green = <0xFF>;
+	def-back-color-blue = <0xFF>;
+};