Hi team,
We have new updates.
The customer managed to use 4K@29Hz by forcing it through Uboot like suggested here. However, we get the following error:
Apalis iMX8 # setenv tdxargs video=HDMI-A-1:3840x2160@29
...
TorizonCore 5.7.2-devel-20230218+build.723 apalis-imx8-07279051 ttyLP1
apalis-imx8-07279051 login: [ 21.631161] [drm:cdns_hdmi_get_edid_block] *ERROR* get block[0] edid failed: -22
[ 21.638618] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
apalis-imx8-07279051 login: [ 43.385934] [drm:cdns_hdmi_get_edid_block] *ERROR* get block[0] edid failed: -22
[ 43.393389] [drm:cdns_hdmi_connector_get_modes] *ERROR* Invalid edid
Also, we don’t want to force the resolution but make EDID work.
Interestingly, we also have some discoveries on the HW side (all using EDID):
Ixora + Multimedia Image
=> HDMI 4k display does not display anything including 4K30fps.
=> Another display with HDMI 1920x1080 will display
Ixora + TorizonCore (I just burned TorizonCore 5.7.0+build.17 (dunfell) from EasyInstaller. I want the display, so With Evaluation Container version specification)
=> HDMI 4k display does not display 4K30fps, but displays at 1024x768 (60Hz).
(There are times when it is not displayed and there is a sense of instability)
Custom board (based in Apalis EVB) + MultimediaImage
=> HDMI 4k display does not display anything including 4K30fps.
=> Another display with HDMI 1920x1080 will display
Custom board + TorizonCore (just burned TorizonCore 5.7.0+build.17 (dunfell) from EasyInstaller.)
=> HDMI 4k display does not display 4K30fps, but displays at 1024x768 (60Hz).
Custom board + TorizonCore with our app (+ our device tree overlay, our app not started)
=> HDMI 4k display does not display anything including 4K30fps.
=> Display HDMI 1920x1080 display (Portainer login screen)
=> Display 1920x1080 with DVI input (using HDMI->DVI conversion connector)
It seems that it does not depend on the customer custom board, but also Ixora is affected as well. Ideally maybe we should want we to display HDMI 4k30fps display with Ixora for this display (Which we confirmed it works at 4K@30 connecting it to a computer).