lkml.org 
[lkml]   [2016]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 0/2] Add memcpy support for tegra210-adma
From
Date
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

\
 
 \ /
  Last update: 2016-09-17 09:58    [W:0.086 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site