Hi,
the function `rpi_vc_fdt_parse` in
arch/arm/boards/raspberry-pi/rpi-common.c registers multiple fixups that
take over nodes from the video core device tree. These fixups make use
of the `of_copy_property` function to copy the properties of the
respective node. In the case of already existing nodes (and properties),
this function duplicates the properties instead of updating them.
If the intention is to not override existing properties, one should
probably check for the existence of each property before copying to
avoid kernel warnings and misconfiguration due to duplicate properties.
If existing properties are supposed to be updated, this could be
achieved by switching to `of_set_property` (or something similar). Note
that this notion of overriding properties also exists in video core, see
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/broadcom/bcm2711.dtsi?h=v6.8#n412
for an example.
I would be glad to submit a patch for either case.
Regards,
Jonas
