Hi! > [ Upstream commit 8fea78029f5e6ed734ae1957bef23cfda1af4354 ] > > 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' > > Function atmel_pcm_dma_platform_register is defined under > CONFIG SND_ATMEL_SOC_DMA, so select SND_ATMEL_SOC_DMA in > CONFIG SND_ATMEL_SOC_SSC, same to CONFIG_SND_ATMEL_SOC_PDC. 4.19 code has significant differences from mainline in this area. 4.19: config SND_ATMEL_SOC_DMA tristate select SND_SOC_GENERIC_DMAENGINE_PCM default m if SND_ATMEL_SOC_SSC_DMA=m && SND_ATMEL_SOC_SSC=m ... mainline: config SND_ATMEL_SOC_DMA tristate select SND_SOC_GENERIC_DMAENGINE_PCM ... Extra 'default m if' line in 4.19 should already prevent this bug, additional select statements are not neccessary. Best regards, Pavel > +++ b/sound/soc/atmel/Kconfig > @@ -25,6 +25,8 @@ config SND_ATMEL_SOC_DMA > > config SND_ATMEL_SOC_SSC_DMA > tristate > + select SND_ATMEL_SOC_DMA > + select SND_ATMEL_SOC_PDC > > config SND_ATMEL_SOC_SSC > tristate -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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