Input HDMI into AGX Xavier

How is it possible to input HDMI output into j509 camera port?

Are there any converters or any other devices?

hello ucha.dzodzuashvili,

you’ll need HDMI2CSI hardware device for converting the signaling as MIPI signaling.
you might access Jetson AGX Xavier OEM Product Design Guide and check the [Jetson AGX Xavier CSI Pin Descriptions] session for details.
we also had driver included, please also refer to kernel sources for HDMI-CSI bridge driver.
for example,
$l4t-r32.2/public_sources/kernel/nvidia/drivers/media/i2c/tc358840.c