Re: [PATCH v2 0/2] Add memcpy support for tegra210-adma

[Jon Hunter]

On 06/09/16 13:03, Dmitry Osipenko wrote:
> 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.

Description from the Tegra TRM:

"The APB DMA Controller is placed between the AHB Bus and the APB Bus
and is a master on both buses.

The APB DMA Controller is used for block data transfers from a source
location to the destination location. The source may be
DRAM or IRAM, and the destination location could be devices placed on
APB Bus; or vice versa."

Cheers
Jon

-- 
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