Integrate custom EDID binary to connect through HDMI a Display

davidgut — Wed, 28 Jul 2021 16:00:40 GMT

Dear Community,

I am trying to connect a TFT Display to a Wandboard Solo via HDMI. I have all the necessary information from the TFT Display at hand including the EDID binary, unfortunately, I have not been able to make it work.

I tried modifying the xorg.conf file as follows:

Section "Device"
Identifier "i.MX Accelerated Framebuffer Device"
Driver "vivante"
Option "fbdev" "/dev/fb0"
Option "vivante_fbdev" "/dev/fb0"
Option "HWcursor" "false"

Option "CustomEDID" "DFP-0:/etc/X11/edid.bin"      %% Added
Option "IgnoreEDID" "false"                                       %% Added
Option "UseEDID" "true"                                            %% Added
EndSection

Section "ServerFlags"
Option "BlankTime" "0"
Option "StandbyTime" "0"
Option "SuspendTime" "0"
Option "OffTime" "0"
EndSection

The Wandboard is running on a Yocto image provided by technexion at: ftp.technexion.net/demo_software/WANDBOARD/wandboard-imx6/wandboard-imx6_yocto-2.0_qt5.5_20170508.zip

I would very greatly appreciate any help!

Best regards,

David

Additional Info:

root@wandboard:/etc/X11# uname -r
4.1.15-134094-gd28f9da-dirty

Re: Integrate custom EDID binary to connect through HDMI a Display

Zhiming_Liu — Mon, 02 Aug 2021 01:52:37 GMT

Hi @davidgut

Is there any kernel error log that you can provide?

Re: Integrate custom EDID binary to connect through HDMI a Display

davidgut — Wed, 04 Aug 2021 08:57:33 GMT

Hi,

Attached are the logs. Thank you for your support!

Regards

Re: Integrate custom EDID binary to connect through HDMI a Display

Zhiming_Liu — Thu, 05 Aug 2021 02:12:18 GMT

Hi @davidgut

I think you can use xrandr to debug the dispaly device.

I see that there is no output in last log ‘starting autohdmi:’

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