boards: st: add pllsai for ltdc & mipi-dsi support on stm32f469 disco
Extension of support of pllsai for display configuration of stm32f469
discovery board. Enable Display panel through LTDC & DSI-HOST
blocks. Enable Touch screen. Enable FMC/SDRAM for Framebuffer.
Signed-off-by: Philippe Peurichard <p.peurichard@gmail.com>
diff --git a/boards/st/stm32f469i_disco/Kconfig.defconfig b/boards/st/stm32f469i_disco/Kconfig.defconfig
index e8f2fd5..edca9a3 100644
--- a/boards/st/stm32f469i_disco/Kconfig.defconfig
+++ b/boards/st/stm32f469i_disco/Kconfig.defconfig
@@ -9,5 +9,36 @@
default y
depends on SPI
+if LVGL
+# Double frame buffer maintained by lvgl.
+config STM32_LTDC_FB_NUM
+ default 0
+
+config LV_Z_DOUBLE_VDB
+ default y
+
+config LV_Z_VDB_ZEPHYR_REGION
+ default y
+
+config LV_Z_VDB_ZEPHYR_REGION_NAME
+ default "SDRAM1"
+
+config LV_Z_FULL_REFRESH
+ default y
+
+config LV_Z_BITS_PER_PIXEL
+ default 32
+
+config LV_DPI_DEF
+ default 128
+
+config LV_Z_FLUSH_THREAD
+ default y
+
+choice LV_COLOR_DEPTH
+ default LV_COLOR_DEPTH_32
+endchoice
+
+endif #LVGL
endif # BOARD_STM32F469I_DISCO
diff --git a/boards/st/stm32f469i_disco/stm32f469i_disco.conf b/boards/st/stm32f469i_disco/stm32f469i_disco.conf
new file mode 100644
index 0000000..cbb43ea
--- /dev/null
+++ b/boards/st/stm32f469i_disco/stm32f469i_disco.conf
@@ -0,0 +1,5 @@
+# Copyright (c) 2025 Philippe Peurichard <p.peurichard@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+# Initialize after LTDC and MIPI-DSI
+CONFIG_DISPLAY_OTM8009A_INIT_PRIORITY=87
diff --git a/boards/st/stm32f469i_disco/stm32f469i_disco.dts b/boards/st/stm32f469i_disco/stm32f469i_disco.dts
index f248df2..ac535a6 100644
--- a/boards/st/stm32f469i_disco/stm32f469i_disco.dts
+++ b/boards/st/stm32f469i_disco/stm32f469i_disco.dts
@@ -20,6 +20,8 @@
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,ccm = &ccm0;
+ zephyr,display = <dc;
+ zephyr,touch = &ft5336;
};
sdram1: sdram@c0000000 {
@@ -53,6 +55,12 @@
};
};
+ lvgl_pointer {
+ compatible = "zephyr,lvgl-pointer-input";
+ input = <&ft5336>;
+ invert-y;
+ };
+
gpio_keys {
compatible = "gpio-keys";
@@ -86,6 +94,17 @@
mul-n = <336>;
div-p = <2>;
div-q = <7>;
+ div-r = <6>;
+ clocks = <&clk_hse>;
+ status = "okay";
+};
+
+&pllsai {
+ div-m = <8>;
+ mul-n = <266>;
+ div-p = <2>;
+ div-r = <5>;
+ div-divr = <2>;
clocks = <&clk_hse>;
status = "okay";
};
@@ -116,6 +135,13 @@
pinctrl-0 = <&i2c1_scl_pb8 &i2c1_sda_pb9>;
pinctrl-names = "default";
status = "okay";
+
+ ft5336: ft5336@2a {
+ compatible = "focaltech,ft5336";
+ reg = <0x2a>;
+ int-gpios = <&gpioj 5 0>;
+ status = "okay";
+ };
};
&spi2 {
@@ -174,7 +200,6 @@
sdram {
compatible = "st,stm32-fmc-sdram";
- status = "okay";
power-up-delay = <100>;
num-auto-refresh = <8>;
mode-register = <0x230>;
@@ -184,6 +209,7 @@
* Note: SDRAM_CLK_MHZ = HCLK_MHZ / 2
*/
refresh-rate = <1292>;
+ status = "okay";
bank@0 {
reg = <0>;
@@ -199,3 +225,56 @@
};
};
};
+
+&mipi_dsi {
+ /* DSI HOST dedicated PLL
+ * F_VCO = CLK_IN / pll-idf * 2 * pll-ndiv
+ * PHI = F_VCO / 2 / (1 << pll-odf) = lane_byte_clk
+ * = 8 MHz / 2 * 2 * 125 / 2 / (1<<0) / 8 = 62.5 MHz
+ */
+ pll-ndiv = <125>;
+ pll-idf = <2>;
+ pll-odf = <0>;
+ vs-active-high;
+ hs-active-high;
+ de-active-high;
+ status = "okay";
+
+ otm8009a: otm8009a@0 {
+ compatible = "orisetech,otm8009a";
+ reg = <0x0>;
+ height = <800>;
+ width = <480>;
+ reset-gpios = <&gpioh 7 0>;
+ bl-gpios = <&gpioa 3 0>;
+ data-lanes = <2>;
+ pixel-format = <MIPI_DSI_PIXFMT_RGB888>;
+ rotation = <90>;
+ status = "okay";
+ };
+};
+
+<dc {
+ width = <800>;
+ height = <480>;
+ pixel-format = <PANEL_PIXEL_FORMAT_RGB_888>;
+ ext-sdram = <&sdram1>;
+ def-back-color-red = <0>;
+ def-back-color-green = <0>;
+ def-back-color-blue = <0>;
+ status = "okay";
+ /* orisetech, otm8009a */
+ display-timings {
+ compatible = "zephyr,panel-timing";
+ hsync-active = <0>;
+ vsync-active = <0>;
+ de-active = <0>;
+ pixelclk-active = <0>;
+ hsync-len = <2>;
+ vsync-len = <1>;
+ hback-porch = <34>;
+ vback-porch = <15>;
+ hfront-porch = <34>;
+ vfront-porch = <16>;
+ };
+};
diff --git a/boards/st/stm32f469i_disco/stm32f469i_disco_defconfig b/boards/st/stm32f469i_disco/stm32f469i_disco_defconfig
index 51eadcb..35e38b4 100644
--- a/boards/st/stm32f469i_disco/stm32f469i_disco_defconfig
+++ b/boards/st/stm32f469i_disco/stm32f469i_disco_defconfig
@@ -14,3 +14,9 @@
# enable GPIO
CONFIG_GPIO=y
+
+# Enable External Memory
+CONFIG_MEMC=y
+
+# Configure Display
+CONFIG_STM32_LTDC_ARGB8888=y
