[RFC] drivers/staging/axis-fifo: Looking for users

Hi,
The AXI Stream FIFO driver has been in staging since 2018. I was trying to
understand whether there are real in-tree users of this hardware today, and
what the expected direction for graduating the driver out of staging might be.

The only in tree reference to this driver that i found is
drivers/ethernet/xilinx/xilinx_axienet_main.c, which states:

 * TODO:
 *  - Add Axi Fifo support.

From this, it appears AXI Stream FIFO support may be used for some AXI
Ethernet hardware configurations. However, I’m not sure whether there are
any other in-tree users of the AXI Stream FIFO IP besides Ethernet, or
whether Ethernet is the primary intended consumer.

If there are no other in-tree users, it’s unclear whether this driver should
remain a standalone staging driver or be integrated into a specific subsystem
like networking.

Can you let me know if there are any known in-tree users for this driver,
whether it has a large enough user base to justify its existence in
the kernel tree,
and what the hardware's real use cases are?

Thanks,
Arihan Bhor