Re: [PATCH v2 3/6] dmaengine: dw: Set DMA device max segment size parameter

* Re: [PATCH v2 3/6] dmaengine: dw: Set DMA device max segment size parameter
       [not found]     ` <20200508112152.GI185537@smile.fi.intel.com>
@ 2020-05-08 18:49       ` Vineet Gupta
  0 siblings, 0 replies; only message in thread
From: Vineet Gupta @ 2020-05-08 18:49 UTC (permalink / raw)
  To: Andy Shevchenko, Serge Semin
  Cc: devicetree, Thomas Bogendoerfer, Arnd Bergmann, Paul Burton,
	Viresh Kumar, linux-mips, Serge Semin, Alexey Malahov,
	Vinod Koul, Rob Herring, Ralf Baechle, dmaengine, Dan Williams,
	arcml, linux-kernel

On 5/8/20 4:21 AM, Andy Shevchenko wrote:
> Yeah, I have locally something like this and I didn't dare to upstream because
> there is an issue. We have this information per DMA controller, while we
> actually need this on per DMA channel basis.
>
> Above will work only for synthesized DMA with all channels having same block
> size. That's why above conditional is not needed anyway.
>
> OTOH, I never saw the DesignWare DMA to be synthesized differently (I remember
> that Intel Medfield has interesting settings, but I don't remember if DMA
> channels are different inside the same controller).
>
> Vineet, do you have any information that Synopsys customers synthesized DMA
> controllers with different channel characteristics inside one DMA IP?

The IP drivers are done by different teams, but I can try and ask around.
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