Messages in this thread | | | Subject | Re: [PATCH v2 0/2] Add memcpy support for tegra210-adma | From | Dmitry Osipenko <> | Date | Tue, 6 Sep 2016 15:03:43 +0300 |
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On 06.09.2016 14:33, Jon Hunter wrote: > > On 03/09/16 01:32, Nicolin Chen wrote: >> This series of patches add memcpy support for tegra210 ADMA engine. > > Thanks. Any reason you choose this DMA and not the APB DMA? The APB DMA > is more of a generic DMA and so for memcpy it would seem to be a good > choice and it is available on all Tegras not just Tegra210. >
Just a small clarification:
If I'm not mistaken, APB DMA is mem-to-device, while AHB DMA is mem-to-mem. So, you probably meant AHB and not the APB.
> Furthermore, from a power standpoint the ADMA is in the audio power > domain and so using it for memcpy would mean the audio power domain is > turned on. It may not be a big deal for some, but given the APB is in > the CORE domain (always on when not in low-power) it seems like a better > choice for power as well. >
-- Dmitry
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