Missing /dev/fb0 device on iMX6 sololite - Kernel 5.15.11

[abrahim]

Hi,

I can't get any /dev/fb0 device on my iMX. On the boot I have a NXP psplash image and after it turns off and nothing happens. I don't even have a log message error.

I have a LCD touch panel, connected to the iMX with LVDS. The hardware is OK as it works with an old LTIB distribution.

Please find attached :

• The kernel boot log
• The Device tree 5.15.11
• The .config of the kernel
• The Display datasheet
• The old LTIB configuration file which workson kernel 3.0

Thanks

[abrahim · Accepted solution]

It worked when I took the sabreauto device tree display configuration :

&ipu1_csi1_from_ipu1_csi1_mux {
 clock-lanes = <0>;
 data-lanes = <1 2>;
};

 mipi_xclk: mipi_xclk { /* I don't know if this block is relevant, I kept it anyway */
 compatible = "pwm-clock";
 #clock-cells = <0>;
 clock-frequency = <22000000>;
 clock-output-names = "mipi_pwm3";
 pwms = <&pwm3 0 45>; /* 1 / 45 ns = 22 MHz */
 status = "okay";
};

 backlight_lvds: backlight-lvds {
 compatible = "pwm-backlight";
 pwms = <&pwm4 0 50000>;
 brightness-levels = <0 4 8 16 32 64 128 255>;
 default-brightness-level = <7>;
 power-supply = <&reg_3p3v>;
 status = "okay";
};

&ldb {
 status = "okay";

 lvds-channel@0 {
 fsl,data-mapping = "spwg";
 fsl,data-width = <18>;
 status = "okay";

 display-timings {
 native-mode = <&timing0>;
 timing0: atm0700l6l {
 clock-frequency = <38000000>;
 hactive = <800>;
 vactive = <480>;
 hback-porch = <46>;
 hfront-porch = <210>;
 vback-porch = <23>;
 vfront-porch = <12>;
 hsync-len = <10>;
 vsync-len = <10>;
 };
 };
 };
};

[Bio_TICFSL]

hello,

Currently your version is not supported by NXP, You may download the official nxp version of the kernel 5.15.71 BSP, it works on ltib because it is from NXP.

Regards