Re: [PATCH v2 0/2] Add Qualcomm MSM ADM DMAEngine driver

From: Ravi Kumar V
Date: Wed Feb 01 2012 - 03:38:49 EST

On 2/1/2012 1:59 PM, Vinod Koul wrote:
On Wed, 2012-02-01 at 11:46 +0530, Ravi Kumar V wrote:
On 1/31/2012 11:39 AM, Vinod Koul wrote:
On Tue, 2012-01-31 at 11:29 +0530, Ravi Kumar V wrote:

Yes if we follow the above RFC and add extra context parameter also
device_prep_dma_sg()& device_prep_interleaved_dma() then it supports
our hardware and our work will be completed.

can we follow above RFC and implement our driver.
Is above RFC finalized and included in mainline?
Alexandre will post an updated one soon, but the idea is same

Can we add extra parameter context to device_prep_dma_sg()&
device_prep_interleaved_dma() API's and implement our driver.
So what one are you going to use...

From the description sounds like you need interleaved API but with
changes to make it interleaved in both src and dtsn, right?
Then why prep_dma_sg?

Our hardware supports single transfer mode,scatter gather mode & box mode.

we are using these dmaengine API's for our HW
device_prep_memcpy() for single mode.
device_prep_dma_sg() for sg mode.
device_prep_interleaved_dma() for box mode.

We need to pass command configuration parameter to all of the above three modes and it can be possible if extra context parameter is added into these API's

Ravi Kumar

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