port-arm/60194: olimex olinuxino-a64: no display output over hdmi since netbsd-9

["nia%pkgsrc.org@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60194
>Category:       port-arm
>Synopsis:       olimex olinuxino-a64: no display output over hdmi since netbsd-9
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 16 13:55:00 +0000 2026
>Originator:     nia
>Release:        HEAD, netbsd-11, netbsd-10
>Organization:
The NetBSD Foundation
>Environment:
>Description:
full dmesg: https://dmesgd.nycbug.org/dmesgd?do=view&id=8914

The screen goes blank after u-boot.

It only works if the kernel is downgraded to netbsd-9.
>How-To-Repeat:

>Fix: