Messages in this thread | | | Date | Tue, 7 Aug 2012 15:21:26 +0300 | From | Felipe Balbi <> | Subject | Re: [PATCH] spi: omap2-mcspi: In case of dma errors fall back to pio |
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Hi,
On Tue, Aug 07, 2012 at 05:02:27AM -0700, Tony Lindgren wrote: > * Shubhrajyoti <shubhrajyoti@ti.com> [120807 04:21]: > > On Tuesday 07 August 2012 01:17 PM, Tony Lindgren wrote: > > >> }; > > > Don't you need to check separately for rx and tx dma? There's a slight > > > chance that you get a channel for one but not for the other.. > > In that case I treat it as non usable and fall back to pio. > > OK that should work too. > > > Are you suggesting that let one channel be dma and only the failed one pio? > > I guess both are doable. For reduced CPU load using DMA where possible > of course is the best way to go.
indeed. if you can get DMA for TX but not for RX, then at least TX can go via DMA ;-)
-- balbi [unhandled content-type:application/pgp-signature] | |