> However, unlike the Rockchip driver, spacemit_i2s_dai already has most
> of the playback
> and capture capabilities initialized statically. As a result,
> spacemit_i2s_init_dai() ends up
> assigning the same values again, for example channels_min, channels_max,
> rates,
> and formats, which seems redundant.
>
> If you think that makes sense, I can either remove those redundant
> assignments,
> or make it follow the Rockchip approach by keeping the static
> spacemit_i2s_dai
> minimal and initializing those fields only in spacemit_i2s_init_dai().

Nice catch. Please follow the Rockchip approach: keep the static
spacemit_i2s_dai minimal and initialize the playback and capture fields
conditionally in spacemit_i2s_init_dai().

Simply removing the assignments from spacemit_i2s_init_dai() would leave
channels_min nonzero for both directions in the static template.
snd_soc_dai_stream_valid() treats a direction with a nonzero channels_min
as supported, so the driver would continue advertising capture even for
a device with only a "tx" DMA. The binding permits such a configuration.

Please preserve rate_min and rate_max when moving the capability fields,
and send this change as a separate patch.

                                            - Troy