2024-02-01 06:28 AM
Hi,
I am using an STM32MP157_SOM interfaced with an LCD-OLinuXino-7TS screen. I have activated the splash screen for U-Boot and psplash in the kernel. The U-Boot splash screen works correctly. However, after the 'Starting kernel...' message, the screen goes black until the psplash is launched (17 seconds with the splash screen). I have included parts of the DTS for U-Boot and the kernel. Is there a way to keep the U-Boot screen displayed until the psplash launches?
LCD power enable and backlight stay enabled.
u-boot dts :
backlight: backlight {
compatible = "gpio-backlight";
gpios = <&gpiod 13 GPIO_ACTIVE_LOW>;
default-on;
status = "okay";
power-supply = <&vdd>;
};
panel-rgb@0 {
compatible = "simple-panel";
backlight = <&backlight>;
reset-gpios = <&gpioa 14 GPIO_ACTIVE_HIGH>;
enable-gpios = <&gpiof 13 GPIO_ACTIVE_HIGH>;
status = "okay";
port {
lcd_panel_in: endpoint {
remote-endpoint = <&lcd_display_out>;
};
};
display-timings {
timing@0 {
clock-frequency = <33300000>;//OK
hsync-len = <20>;
hback-porch = <26>;
hactive = <800>;
hfront-porch = <210>;
hsync-active = <0>;
vsync-active = <0>;
vsync-len = <10>;
vback-porch = <13>;
vactive = <480>;
vfront-porch = <22>;
de-active = <1>;
pixelclk-active = <0>;
};
};
kernel dts :
2024-02-05 02:51 AM
I checked the LCD clock. The clock is disabled after the 'starting kernel...' Is there a way to maintain this clock?
2024-06-13 02:24 AM
Hello, Have you sloved this problem?
2024-06-25 05:20 PM
Hello,
I want to solve this problem, too.
thanks, reply.