On Thu, May 22, 2014 at 10:35 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote: > On Thursday 22 May 2014 20:52:38 Linus Walleij wrote: >> On Thu, May 22, 2014 at 5:49 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote: >> > On Thursday 22 May 2014 15:45:03 Catalin Marinas wrote: >> >> >> Anyway, I don't think we have any streaming DMA used on these RealView >> >> boards. >> > >> > Yes, I think that is correct. MMCI, SSP and serial could all use >> > DMA but are not configured to do it. >> >> PB1176 has no working DMA (borked DMA hardware), the PB11MPCore >> actually has working DMA but only on UART TX and maybe AACI >> (haven't tested) no clue about the Cortex boards PBA8 and PBX though. > > I don't see any DMA data passed to the pl011 driver for PB11MPCore > or any other realview board, so even if it works, we don't use it. No I was more saying it works in theory... and we actually have patches to enable it for e.g. memcpy on Versatile and PB11MP that I floated at times, Russell also experimented around with it. > The AACI driver doesn't seem to support DMA. Nope, but the hardware does. > PBA8 and PBX don't need the hack because they don't have a broken > l2x0. True! Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
