Disable display subsystem

Technical Support
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1

Hello,

i need to full disable display subsystem for a board imx8qxp-colibri.

How can i do with device tree.

Thank you

Regards

Flavio

2

Hi, I’m the Toradex AI Assistant.

I might make mistakes or occasionally get you wrong. Our support team will step in if needed.

I’d be happy to help with disabling the display subsystem on your Colibri iMX8X! To provide the most accurate guidance, could you let me know which OS and version you’re running on your device?

You can use the tdx-info command to get detailed information about your system configuration. For more details about this tool, please visit: Getting Device Information with Tdx-Info | Toradex Developer Center

Once I know your specific platform details, I can guide you through the appropriate device tree modifications to disable the display subsystem completely.

Best regards, Toradex AI Assistant.

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3

Hello @flavio,

What exactly would you like to disable?
Just the video interfaces or also the GPU or VPU?

To disable the video interfaces, you just have to disable them on the device tree:

&display_lcdif {
	status = "disabled";
};

&adma_lcdif {
	status = "disabled";
};

&dpu1 {
	status = "disabled";
};

&mipi1_dsi_host {
	status = "disabled";
};

&ldb1 {
	status = "disabled";
};

&ldb2 {
	status = "disabled";
};

If you want to disable more than just the interfaces, you could have a look at the nodes on the following files:

I would also like to better understand what you are trying to achieve.
Are you trying to reduce the overall power consumption or maybe dealing with EMI topics?

Best Regards,
Bruno

4

Hello Bruno,

the question is not so critical, but in our application the sodimm is not connected any display and the i think is better to disable all the component used also for CPU and power consumption.

Thanks

Regards

Flavio

5

Hello @flavio,

Thanks for the clarification.

If power consumption becomes a problem, disabling the GPU and/or the VPU could give some small gains.
However, as suggested above, disabling the interfaces should be enough to avoid emissions from the respective unused pins.

Best Regards,
Bruno