On Tue, Oct 01, 2019 at 04:20:55PM +0200, Arnd Bergmann wrote:
> The ssc audio driver can call into both pdc and dma backends. With the
> latest rework, the logic to do this in a safe way avoiding link errors
> was removed, bringing back link errors that were fixed long ago in commit
> 061981ff8cc8 ("ASoC: atmel: properly select dma driver state") such as
>
> sound/soc/atmel/atmel_ssc_dai.o: In function `atmel_ssc_set_audio':
> atmel_ssc_dai.c:(.text+0xac): undefined reference to `atmel_pcm_pdc_platform_register'
>
> Fix it this time using Makefile hacks and a comment to prevent this
> from accidentally getting removed again rather than Kconfig hacks.
>
> Fixes: 18291410557f ("ASoC: atmel: enable SOC_SSC_PDC and SOC_SSC_DMA in Kconfig")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> sound/soc/atmel/Kconfig | 4 ++--
> sound/soc/atmel/Makefile | 10 ++++++++--
> 2 files changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig
> index f118c229ed82..25c31bf64936 100644
> --- a/sound/soc/atmel/Kconfig
> +++ b/sound/soc/atmel/Kconfig
> @@ -10,11 +10,11 @@ config SND_ATMEL_SOC
> if SND_ATMEL_SOC
>
> config SND_ATMEL_SOC_PDC
> - tristate
> + bool
> depends on HAS_DMA
>
> config SND_ATMEL_SOC_DMA
> - tristate
> + bool
> select SND_SOC_GENERIC_DMAENGINE_PCM
>
> config SND_ATMEL_SOC_SSC
> diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile
> index 1f6890ed3738..c7d2989791be 100644
> --- a/sound/soc/atmel/Makefile
> +++ b/sound/soc/atmel/Makefile
> @@ -6,8 +6,14 @@ snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
> snd-soc-atmel-i2s-objs := atmel-i2s.o
> snd-soc-mchp-i2s-mcc-objs := mchp-i2s-mcc.o
>
> -obj-$(CONFIG_SND_ATMEL_SOC_PDC) += snd-soc-atmel-pcm-pdc.o
> -obj-$(CONFIG_SND_ATMEL_SOC_DMA) += snd-soc-atmel-pcm-dma.o
> +# pdc and dma need to both be built-in if any user of
> +# ssc is built-in.
> +ifdef CONFIG_SND_ATMEL_SOC_PDC
> +obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel-pcm-pdc.o
> +endif
> +ifdef CONFIG_SND_ATMEL_SOC_DMA
> +obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel-pcm-dma.o
> +endif
> obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
> obj-$(CONFIG_SND_ATMEL_SOC_I2S) += snd-soc-atmel-i2s.o
> obj-$(CONFIG_SND_MCHP_SOC_I2S_MCC) += snd-soc-mchp-i2s-mcc.o
I was just exploring similar solution, using $(if X,Y) instead, but your
fix will work just as well.
Reviewed-by: Michał Mirosław <mirq-linux@xxxxxxxxxxxx>
Best Regards,
Michał Mirosław
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