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

[Ravi Kumar V]

On 2/1/2012 2:16 PM, Vinod Koul wrote:
> On Wed, 2012-02-01 at 14:07 +0530, Ravi Kumar V wrote:
> > 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
> but again, is this static fr channel for each transfer. Would you be
> able to derive these for non box modes?

Command configuration parameter has this information which is used be our HW
1.Device Id for Synchronization & acknowledgment with slow clock devices.
2.Endian type.
3.Blocking/unblocking channel after/before transfer.

Command configuration parameter should be passed in all the three modes 
and per transfer so this parameter is dynamic keep changing for each 
transfer.

--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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