Enable Multi Display in iMX8QM running Android Automotive OS 11.0.0_2.3.0

[swapnil]

Hello,

I am trying to enable multi display function in Android Automotive OS 11.0.0_2.3.0 running on iMX8QM. We want to enable HDMI_TX as the default display interface for the Android Automotive OS primary display rather than LVDS.

I have referred the Android User's Guide and have performed the steps mentioned in the document.
The steps are:

1. Into the uboot mode, entered the fastboot mode using fastboot 0.

2. Then, flashed the dtbo-imx8qm-md.img & vbmeta-imx8qm-md.img to their respective partitions.

Further, I am unable to see anything on the display connected through the HDMI_TX port.

Would appreciate the response to resolve this.

Thanks!!

[swapnil]

But the documentation suggest that Android Automotive OS 11 also support multi display functionality. However, with the above steps, the android system is not detecting the HDMI display.

[Bio_TICFSL]

Hi,

You may try android automotive 13 or 14, where the hdmi is working.

regards

[swapnil]

Hello,

I have tried with Android Automotive OS 14 also on NXP i.MX8QM. The results are still same - "unable to see anything on the display connected through HDMI". The android system doesn't detect the HDMI display. 

[Bio_TICFSL]

Hi,

Just tried to boot the MX8QM with Android and everything works ok on hdmi, maybe is a problem with the hardware of HDMI, I can see the HDMI-TX with J6.

Regards

[Bio_TICFSL]

Hello,

For android 11 does not include support for dual display, you may try android 13 or 14 however if you want to try, try this:

Please refer to it.

&mipi0_disp {
    compatible = "fsl,imx8mp-mipi-display";
    disp-type = "mipi-dsi";
    status = "okay";
    port@0 {
        endpoint {
            remote-endpoint = <&dpu1_mipi0>;
        };
    };
};

&lvds0_disp {
    compatible = "fsl,imx8mp-lvds-display";
    disp-type = "lvds";
    status = "okay";
    port@0 {
        endpoint {
            remote-endpoint = <&dpu1_lvds0>;
        };
    };
};

For more details please refer to the location given below.
Documentation/devicetree/bindings/display/

Regards