Disable HDMI in u-boot for rk3399 boards
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Igor Pecovnik June 28, 2020 at 8:33 PM
Images are getting rebuild - from trunk with 20.05.6 version. Its too complicated to build from 20.05 branch …
Piotr Szczepanik June 28, 2020 at 6:40 PM
Let’s leave it disabled for v20.05 (as it always was in mainline u-boot).
I will integrate Jagan’s patch in master and try to test it with the people that were complaining in the forums.
One of the change in u-boot v2020.04 was the enablement of HDMI in u-boot.
I tested this scenario while upgrading u-boot with WQHD Dell u2719d which I have access to and it was working.
However since the switch to u-boot v2020.04 there are two reported cases already that users cannot boot with v20.05.x and HDMI cable connected during boot.
https://forum.armbian.com/topic/14289-nanopi-m4-v1-wont-boot-latest-versions/
https://forum.armbian.com/topic/13865-nanopc-t4-will-not-boot-image-made-with-current-build-script-bug/
Unplugging HDMI cable for boot and plugging it after boot helps.