Mallow + AM62S + Capacitive Touch Display 10.1" DSI

Technical Support
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1

Hello,

We recently purchased a Mallow Carrier Board with an AM62S SOM and a Capacitive Touch Display DSI from Toradex to evaluate the SOM.

I’ve connected the ribbon cable from the display to the Mallow board and flashed the Multimedia Reference Image (7.0). I can successfully SSH into the SOM, but nothing is showing up on the display.

Is there something additional I need to do to enable the display? I was expecting to see a default QT application, but nothing is appearing.

Thanks so much for your help.

root@verdin-am62-15479281:~# tdx-info

Software summary
------------------------------------------------------------
Bootloader:               U-Boot
Kernel version:           6.11.1-7.0.0-00004-gb145011318c6 #1 SMP PREEMPT Mon Sep 30 14:31:09 UTC 2024
Kernel command line:      root=PARTUUID=38c18e39-02 ro rootwait console=tty1 console=ttyS2,115200
Distro name:              NAME="TDX Wayland with XWayland Upstream"
Distro version:           VERSION_ID=7.0.0-build.1
Hostname:                 verdin-am62-15479281
------------------------------------------------------------

Hardware info
------------------------------------------------------------
HW model:                 Toradex Verdin AM62 on Verdin Development Board
Toradex version:          0071 V1.2A
Serial number:            15479281
Processor arch:           aarch64
------------------------------------------------------------

image
image1870×2196 266 KB

2

Hi, I’m the Toradex AI Assistant. The Toradex Support team will follow up with you shortly!

Did you like my answer?

:+1: :-1:

Based on the context provided, it seems you are using a Mallow Carrier Board with an AM62S SOM and a Capacitive Touch Display 10.1" DSI. You have successfully flashed the Multimedia Reference Image and can SSH into the SOM, but the display is not showing any output.

Here are a few steps you can take to troubleshoot and potentially resolve the issue:

  1. Check Display Connections: Ensure that the ribbon cable is securely connected to both the display and the Mallow Carrier Board. Double-check the orientation and seating of the cable.

  2. Verify Compatibility: Make sure that the display is compatible with the Mallow Carrier Board and the AM62S SOM. The context mentions that a Verdin DSI Display Adapter might be required for certain configurations. Ensure that you have all necessary adapters and that they are properly connected.

  3. Kernel and Device Tree Configuration: Verify that the kernel and device tree are configured to support the DSI display. You may need to modify the device tree to enable the DSI interface and configure the display settings.

  4. Check for Display Initialization: Look for any error messages related to display initialization in the boot logs. You can check the logs using dmesg or by reviewing the boot output.

  5. Ensure Correct Image: Confirm that the Multimedia Reference Image you flashed is intended for use with the DSI display and supports the necessary drivers and configurations.

  6. Consult Documentation: Refer to the datasheet and any available documentation for the Capacitive Touch Display 10.1" DSI to ensure all setup steps have been followed.

  7. Contact Technical Support: If the issue persists, consider reaching out to Toradex technical support for further assistance. They can provide more specific guidance based on your hardware and software setup.

If these steps do not resolve the issue, it may be necessary to provide more detailed logs or configuration files to technical support for further analysis.

Please, also check if these links can help you solve your problem:

Easy Installer problem on AM62 D, IT with Mallow V1.1 board.

3

Hello @Fide,

Unfortunately the Verdin AM62 Solo modules do not support a DSI output.
This information is listed on section 1.5.3 Interfaces of the Verdin AM62 datasheet: Verdin AM62 | Toradex Developer Center

I recommend that you use this display with one of the other Verdin AM62 modules.

Best Regards,
Bruno

4

Hi @bruno.tx,

Thanks for the answer. Ok this is noted.
But I have just replaced the SoM with iMX8M-Plus v1.0B on the same Mallow board.
Still there is nothing on the display with the Multimedia Reference Image.

Is this normal also for iMX8M-Plus v1.0B?

root@verdin-imx8mp-06848982:/# tdx-info

Software summary
------------------------------------------------------------
Bootloader:               U-Boot
Kernel version:           6.11.1-7.0.0-00004-gb145011318c6 #1 SMP PREEMPT Mon Sep 30 14:31:09 UTC 2024
Kernel command line:      root=PARTUUID=7fa5cb02-02 ro rootwait console=tty1 console=ttymxc2
Distro name:              NAME="TDX Wayland with XWayland Upstream"
Distro version:           VERSION_ID=7.0.0-build.1
Hostname:                 verdin-imx8mp-06848982
------------------------------------------------------------

Hardware info
------------------------------------------------------------
HW model:                 Toradex Verdin iMX8M Plus WB on Verdin Development Board
Toradex version:          0058 V1.0B
Serial number:            06848982
Processor arch:           aarch64
------------------------------------------------------------
5

Hello @Fide,

You should be able to use the DSI display with the Verdin iMX8M Plus.
The issue you are facing is likely due to a missing device tree overlay for this display.

To enable the overlay, you need to edit the /boot/overlays.txt file to include the correct overlay file. Please look at this page to check the correct name of this file on BSP 7.0.0 and also remove the DSI to HDMI adapter overlay.

Best Regards,
Bruno

6

Hi @bruno.tx ,

Updating overlays.txt in the boot folder as fdt_overlays=verdin-imx8mp_panel-cap-touch-10inch-dsi_overlay.dtbo worked fine for iMX8M-Plus.

At least I could verify the hardware.

Thanks for your help.

1 Like
7

Thanks for the update!

Best Regards,
Bruno