On Wed, Jun 11, 2014 at 10:23 PM, [email protected] <[email protected]> wrote: > On Wed, Jun 11, 2014 at 10:17 AM, Chen-Yu Tsai <[email protected]> wrote: >> On Wed, Jun 11, 2014 at 10:05 PM, [email protected] <[email protected]> >> wrote: >>> Is there a DMAEngine implementation for the A20? >>> Audio drivers will want that. >> >> Emilio (CC-ed) has been working on one, and he pushed out a branch I think. >> >> Depending on how much time it would take to implement the audio drivers, >> I think it'd be a good device to stress test it. EMAC is another. > > How is this stmmac GbE driver Cubietruck is using now doing DMA? Or is > it using DMA?
Like some of the other IP blocks (EHCI/OHCI, AHCI, MMC), GMAC has it's own hardware DMA engine. >>> I hope there is DMAEngine support around somewhere. Last time I tried >>> doing one (LPC3130) I worked on it for two months and then gave up. >>> It's not that implementing DMAEngine is that difficult, the switch to >>> DMAEngine had the side effect of forcing almost every LPC3130 device >>> driver to be rewritten and that was too much for me to do alone. >> >> Most drivers are generic I think. Most of the devices really needing DMA >> don't have mainline drivers at all. That includes display, HDMI and audio. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
