linux-kernel - dmaengine: dw-dmac: Custom cyclic API (Why?)

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Date:   Fri, 30 Dec 2016 11:32:39 +0000
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: dmaengine: dw-dmac: Custom cyclic API (Why?)

Hi All,

I am going to work with dw-dmac AHB controller and I wanted to
use SND_DMAENGINE_PCM. In order to use this, a standard DMA
driver with cyclic support is needed. I found out that dw-dmac is
capable of cyclic transfers but instead of using the DMA engine
standard cyclic API it uses a custom API. Is there any specific
reason for this? What is the effort to change the custom API to a
standard DMA engine cyclic API?

Best regards,

Jose Miguel Abreu