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HDMI Output in i.MX 8QuadMax

Question asked by Cláudio Maia on May 14, 2020
Latest reply on May 26, 2020 by Cláudio Maia

Hello everyone,

 

I'm trying to get output via HDMI on a i.MX 8QuadMax but so far without any success. I've already followed the steps described here Getting an HDMI output on IMX8QMLPDDR4ARM2 for a similar problem and used two different monitors for the test: a PC monitor and a TV monitor.

 

The configurations I'm using are the following:

DISTRO=fsl-imx-xwayland

Yocto project image: fsl-image-qt5-validation-imx

 

Moreover, I tried already setting the bootargs in uboot as follows:

u-boot -> setenv mmcargs 'setenv bootargs console=${console} root=${mmcroot} video=HDMI-A-1:3840x2160-32@30'

 

Other errors that I noticed during boot which I'm not sure if they are indicators of other possible issues related to this problem:

 

During boot the following message shows up:

[FAILED] Failed to start Terminate Psplash Boot Screen.

 

and in dmesg:

 

[    2.429971] [drm] Cannot find any crtc or sizes
[    2.435001] [drm] Initialized imx-drm 1.0.0 20120507 for display-subsystem on minor 0

 

In addition, as this board has 8 LVDS outputs I'm not sure if I'm using the correct one. Should I use a specific one or can I plug the HDMI in any LVDS plug (obviously using the adapter)?

 

Can someone help me on this?

 

P.S. If needed I can provide more information (boot output,  uboot args, ...).

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