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

[Grewstad]

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