On Sat, Dec 04, 2021 at 05:37:09PM +0300, Dmitry Osipenko wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The DMA resource is never set up anywhere, and passing this as slave_id
> has not been the proper procedure in a long time.
> 
> As a preparation for removing all slave_id references from the ALSA code,
> remove this one.
> 
> According to Dmitry Osipenko, this driver has never been used and
> the mechanism for configuring DMA would not work as it is implemented,
> so this part will get rewritten when the driver gets put into use
> again in the future.
> 
> Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  sound/soc/tegra/tegra20_spdif.c | 1 -
>  1 file changed, 1 deletion(-)

In case you want to pick this up into the ASoC tree and Vinod removes it
from the DMA tree:

Acked-by: Thierry Reding <treding@nvidia.com>