I’m trying to connect HDMI display running at 1280x720@60 resolution on: Hikey620 board with Android 9.0 image - Kernel 4.14.77
Hikey 620: https://www.96boards.org/product/hikey/
The problem is that the HDMI display interface seems to be disabled:
$ cat /sys/class/drm/card0-HDMI-A-1/enabled
I added this line to
$ vi device/linaro/hikey/hikey/BoardConfig.mk
BOARD_KERNEL_CMDLINE += video=HDMI-A-1:1280x720@60.
However, HDMI didn’t display on Hikey620 board.
What do I need to do to enable the external HDMI interface?