Hi Morimoto-san, On Tuesday 28 October 2014 17:04:01 Kuninori Morimoto wrote: > Hi Laurent, Simon > > > > On Lager board + SDHI > > > > > > Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> > > > > Thank you. > > > > > Current SDHI driver + DMAC is working, but super slow, > > > especially, write case.... > > > > *sigh* I'll test that. > > Maybe this is SDHI side issue (?) > Buswidth/clock/setting etc etc etc... > No one used SDHI + DMA in DT and in R-Car Gen2 today. I've performed my tests using a 2 bytes bus width. Using a 4 bytes bus width I get similar performances for PIO and DMA. 16 bytes and 32 bytes bus widths don't work out of the box, they would need more work. > So, I guess it is very safety if we can ignore SDHI + DMA in upstream > -> Simon ? -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
