R-Car H3 and M3 with KF environment has two HDMI display port, one of the HDMI port directly out form SoC, another one of the DRGB-HDMI port using ADV7513.

In DRGB-HDMI port has resolution issue. That can use under 1920x1080@30fps. On the other hand, IC reference environment want to use 1920x720@60fps or 1920x1080@60fps.

If I use these resolution, displaying image will break.

I success to fix this issue.

But, this patch is only workaround.

https://github.com/agl-ic-eg/meta-agl-devel/commit/23088fd1298f4a2b6e178d862cc543351d02e160

This patch require to modify in kernel source code not only dtb.

In other R-Car Gen3 AGL official board such as h3sk/m3sk without KF and refhw was not using DRGB display output.

This topic discussed in last SAT meetings. This issue aim to share information.