Hi Geert > > ----------------- > > ... > > [ 0.934996] ak4613-codec 2-0010: No cache used with register defaults > > set! > > => [ 0.945223] rcar_sound ec500000.sound: can't get dma channel > > => [ 0.950911] rcar_sound ec500000.sound: ssi[0] fallback to PIO mode > > => [ 0.957120] rcar_sound ec500000.sound: can't get dma channel > > => [ 0.962802] rcar_sound ec500000.sound: ssi[1] fallback to PIO mode > > [ 0.969000] rcar_sound ec500000.sound: probed > > ... > > ----------------- > > > > This patch seems breaks Sound DMA, is this known issue ? > > Due to probe deferral, the DMA controllers are initialized after the DMA > slaves. As the absence of a DMA channel is considered a soft failure, > drivers continue their initialization, but fall back to PIO mode. > > This is a known issue of v4 of the R-Car SYSC series, cfr. > http://www.spinics.net/lists/arm-kernel/msg495557.html > > Please try topic/gen3-latest instead, which is the integration of v6 of the > R-Car SYSC series and renesas-drivers-2016-04-12-v4.6-rc3, which doesn't > exhibit this problem.
Thanks !
