Messages in this thread | | | Date | Mon, 11 Aug 2014 10:58:50 +0300 | From | Peter Ujfalusi <> | Subject | Re: [PATCH] ARM: edma: Fix configuration parsing for SoCs with multiple eDMA3 CC |
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On 08/05/2014 07:32 PM, Vinod Koul wrote: > On Mon, Aug 04, 2014 at 03:26:56PM +0300, Peter Ujfalusi wrote: >> The edma_setup_from_hw() should know about the CC number when parsing the >> CCCFG register - when it reads the register to be precise. The base >> addresses for CCs stored in an array and we need to provide the correct id >> to edma_read() in order to read the correct register. > > Just an othognal question: > > I still see lot of code for edma in arm/. What is the plan to re/move that > to dma/
Yes, there's still a big split. The code under arch/arm/common/ provides still the 'legacy' edma API. This is still used by audio sound/soc/davinci/davinci-pcm for older daVinci devices (AM335x. AM43xx uses the edma-pcm).
And it is not that simple to deprecate davinci-pcm: it can use so called ping-pong mode for audio data transfer. This mode is not possible via dmaengine AFAIK. I'm going to check if edma-pcm would work fine instead of the ping-pong mode. If it does I can remove davinci-pcm and we can start cleaning up the edma code.
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