Apalis IMX8 Evaluation board no video output (DVI or VGA)

Hi All,

I have an Apalis IMX8 Quad Plus with an apalis toradex evaluation carrier board. I am using Yocto, easy installer to write image

I am trying to get the VGA or DVI display but it dosnt work.

I followed the instructions according to
https://developer-archives.toradex.com/getting-started/module-1-from-the-box-to-the-shell/unboxing-and-setup-cables-apalis-evaluation-board-imx8-torizon?som=apalis-imx8&board=apalis-evaluation-board&os=torizon&desktop=linux

But,unfortunately I couldnt get any video on the display(monitor).

I even tried to use some monitor , but I see nothing there.
I have also tried the tdx-reference-mulitmedia image,but it also dosnt work and same results.

There is nothing displayed on the screen, during U-Boot or in Linux boot even recovery boot with easy installer.

thanks in advance

Could you please share a HW revision of your Apalis iMX8 board? Can you see a Toradex Easy GUI on your display?

Hi
Thank you for answering
Carrier board: Apalis Evaluation board Rev.1.1
Core board:Apalis IMX8QM 4GB WB
I said no
Unfortunately i cant see anything
But i have terminal debug CommandLine and can load easy installer using recovery mode But there inst any video display

when i load Toradex Easy Installer 5.7.1+build.13 () and plugin DVI connector to display
i face bellow messages

U-Boot 2020.04-5.7.1+git.33bb8e968332 (Sep 06 2022 - 15:34:09 +0000)

CPU:   NXP i.MX8QM RevB A53 at 1200 MHz

DRAM:  4 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
Loading Environment from MMC... OK
In:    serial
Out:   serial
Err:   serial
Model: Toradex Apalis iMX8 QuadMax 4GB Wi-Fi / BT IT V1.0B, Serial# 06540920

 BuildInfo: 
  - SCFW 216a2c2e, SECO-FW c9de51c0, IMX-MKIMAGE 6a315dbc, ATF 2fa8c63
  - U-Boot 2020.04-5.7.1+git.33bb8e968332 

switch to partitions #0, OK
mmc0(part 0) is current device
Detect USB boot. Will enter fastboot mode!
Net:   eth0: ethernet@5b040000
Fastboot: Normal
Boot from USB for mfgtools
*** Warning - Use default environment for 				 mfgtools
, using default environment

Run bootcmd_mfg: select_dt_from_module_version && fastboot 0
Hit any key to stop autoboot:  0 
We are in is_imx8
Getting phy ctrl
Detect USB boot. Will enter fastboot mode!
Starting download of 3246 bytes

downloading of 3246 bytes finished
Detect USB boot. Will enter fastboot mode!
Starting download of 43 bytes

downloading of 43 bytes finished
Detect USB boot. Will enter fastboot mode!
Starting download of 106496 bytes

downloading of 106496 bytes finished
Detect USB boot. Will enter fastboot mode!
Starting download of 48235620 bytes
..........................................................................
..........................................................................
..........................................................................
..........................................................................
........................................................................
downloading of 48235620 bytes finished
## Executing script at 82e00000
Loading hdp firmware from 0x000000009c000000 offset 0x0000000000002000
Loading hdp firmware Complete
Bootargs: quiet video=LVDS-1:d video=HDMI-A-1:640x480-16@60D initcall_blacklist=vpu_driver_init rootfstype=squashfs root=/dev/ram autoinstall clk_ignore_unused pci=nomsi
## Loading kernel from FIT Image at 8a000000 ...
   Using 'conf-imx8qm-apalis-eval.dtb' configuration
   Trying 'kernel-1' kernel subimage
     Description:  Linux kernel
     Type:         Kernel Image
     Compression:  gzip compressed
     Data Start:   0x8a000108
     Data Size:    10801175 Bytes = 10.3 MiB
     Architecture: AArch64
     OS:           Linux
     Load Address: 0x96000000
     Entry Point:  0x96000000
     Hash algo:    sha256
     Hash value:   6c4c20cd3c58a7eef0789a58148836db02bfe1e6b5946d3779a1d67e88f51d93
   Verifying Hash Integrity ... sha256+ OK
## Loading ramdisk from FIT Image at 8a000000 ...
   Using 'conf-imx8qm-apalis-eval.dtb' configuration
   Trying 'ramdisk-1' ramdisk subimage
     Description:  tezi-initramfs
     Type:         RAMDisk Image
     Compression:  uncompressed
     Data Start:   0x8ab9ca40
     Data Size:    36052992 Bytes = 34.4 MiB
     Architecture: AArch64
     OS:           Linux
     Load Address: 0xa0000000
     Entry Point:  unavailable
     Hash algo:    sha256
     Hash value:   17528c0a9da50e4511b5951bcad114877f44a6cfcfe60c1e3979e7b1ef955fbe
   Verifying Hash Integrity ... sha256+ OK
   Loading ramdisk from 0x8ab9ca40 to 0xa0000000
## Loading fdt from FIT Image at 8a000000 ...
   Using 'conf-imx8qm-apalis-eval.dtb' configuration
   Trying 'fdt-imx8qm-apalis-eval.dtb' fdt subimage
     Description:  Flattened Device Tree blob
     Type:         Flat Device Tree
     Compression:  uncompressed
     Data Start:   0x8aa4d238
     Data Size:    167627 Bytes = 163.7 KiB
     Architecture: AArch64
     Load Address: 0x87000000
     Hash algo:    sha256
     Hash value:   7329e3f897946b08753d339754887cb803bfb74780b091ea48eb6b6c96aaf40e
   Verifying Hash Integrity ... sha256+ OK
   Loading fdt from 0x8aa4d238 to 0x87000000
## Loading fdt from FIT Image at 8a000000 ...
   Using 'conf-apalis-imx8_hdmi_overlay.dtbo' configuration
   Trying 'fdt-apalis-imx8_hdmi_overlay.dtbo' fdt subimage
     Description:  Flattened Device Tree blob
     Type:         Flat Device Tree
     Compression:  uncompressed
     Data Start:   0x8ab9792c
     Data Size:    2177 Bytes = 2.1 KiB
     Architecture: AArch64
     Load Address: 0x870f0000
     Hash algo:    sha256
     Hash value:   75d00dae6d1d5de88ccd2ea8be1ba975496ee7a8d507eae6b5871089b4bd45f4
   Verifying Hash Integrity ... sha256+ OK
   Loading fdt from 0x8ab9792c to 0x870f0000
   Booting using the fdt blob at 0x87000000
   Uncompressing Kernel Image
   Loading Ramdisk to fb3ec000, end fd64e000 ... OK
   Loading Device Tree to 00000000fb3c0000, end 00000000fb3ebe8e ... OK

Starting kernel ...

[    0.146280] No BMan portals available!
[    0.147483] No QMan portals available!
[    0.776827] imx-audmix imx-audmix.0: failed to find SAI platform device
[    0.872457] imx6q-pcie 5f000000.pcie: pcie_ext clock source missing or invalid
[    0.879986] imx6q-pcie 5f010000.pcie: pcie_ext clock source missing or invalid
[    1.320592] debugfs: Directory '59050000.sai' with parent 'apalis-imx8qm-sgtl5000' already present!
[    1.342410] rtc-ds1307 4-0068: hctosys: unable to read the hardware clock
Running /etc/rc.local...
Toradex Easy Installer 5.7.1+build.13 () 
Starting udev
[    2.393466] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
[    2.778772] debugfs: Directory '59090000.sai' with parent 'imx-audio-hdmi-tx' already present!
[    2.787727] debugfs: File 'Capture' in directory 'dapm' already present!
System time was Thu Jan  1 00:00:02 UTC 1970.
Setting the System Clock using the Hardware Clock as reference...
hwclock: RTC_RD_TIME: Invalid argument
System Clock set. System local time is now Thu Jan  1 00:00:02 UTC 1970.
Tue Sep  6 15:47:08 UTC 2022
Saving the System Clock time to the Hardware Clock...
Hardware Clock updated to Tue Sep  6 15:47:08 UTC 2022.
[    3.154427] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid

Welcome to the Toradex Easy Installer

This is a Linux based installer for Toradex modules. Currently, the installer
does not have a serial console interface. You can use the Toradex Easy Installer
via any of the available display interfaces using USB mouse/keyboard or via a
network connection using VNC. Use:
  # ip addr show
to display the Ethernet IP address(es) or use USB RNDIS at IP 192.168.11.1.

Check our documentation at:
  https://developer.toradex.com/software/toradex-easy-installer
/ # [   97.847505] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
[   97.854812] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
[  106.795179] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
[  108.000015] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid

/ # 
/ # [  152.773679] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
[  152.781041] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
[  168.996458] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
[  169.003792] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid



Thnks

Hello @hhami
Please note that the iMX8 SoM’s don’t have a VGA output. See section 5.6.4 of the Apalis data sheet for more information.

Regarding the DVI output, what kind of monitor are you using. If it is a DVI-A monitor it will not work, because the DVI connector in the evaluation board does not have the analog signal pins connected.

Have you tried to use the HDMI connection to check if that works?

Best regards,
Josep

1 Like

Not sure if that helps, but for me the display worked when I connected the board to the monitor using a DVI-DVI cable, I initially tried with DVI-VGA cable but it didn’t work (same monitor).

Good luck

Hi
great,it worked.
appreciate that
we have to use DVI-D to HDMI convertor or DVI-DVI CAble
thank you for your help

Yes exactly,thank you for your help