On Mon, Jan 13, 2020 at 09:32:42PM +0800, Chen Zhou wrote:
> If CONFIG_SND_ATMEL_SOC_DMA=m, build error:
> 
> sound/soc/atmel/atmel_ssc_dai.o: In function `atmel_ssc_set_audio':
> (.text+0x7cd): undefined reference to `atmel_pcm_dma_platform_register'

You should make sure to CC maintainers on patches, that includes
driver-specific maintainers (as is the case for this one), it's
fine in this case so no need to resend but please bear this in
mind in future.