Re: [PATCH v2] dmaengine: fsl-edma: add PM suspend/resume support

From: Li Yang
Date: Thu Aug 13 2015 - 16:58:09 EST

On Tue, Jul 21, 2015 at 3:56 AM, Yuan Yao <yao.yuan@xxxxxxxxxxxxx> wrote:
> This add power management suspend/resume support for the fsl-edma
> driver.
> eDMA acted as a basic function used by others. What it needs to do is
> the two steps below to support power management.
> In fsl_edma_suspend_late:
> Check whether the DMA chan is idle and if it is not idle, stop PM
> operation.

You should try to quiesce the device on suspend instead of depending
on itself to be happen in idle and failing if it is not.

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