Messages in this thread | | | Date | Fri, 25 May 2012 18:30:06 +0900 | Subject | Re: [PATCH v5] sound/soc/lapis: add platform driver for ML7213 | From | Tomoya MORINAGA <> |
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On Thu, May 24, 2012 at 7:07 PM, Mark Brown <broonie@opensource.wolfsonmicro.com> wrote: >> > Nobody seems to be working on it as far as I can tell, I've certainly >> > not seen any patches. > >> If so, could you accept current platform/machine driver ? > > Ideally what would be happening here is that you or other people who > have such systems would be working to add the required support to the > core code, there's clearly a need for common code here as there are a > number of different systems that don't have cyclic DMA and it wouldn't > be great to end up with duplicated code. > > Is there some great difficulty in factoring out the support for > non-cyclic audio DMA on dmaengine - it seems like if there is we must > have a serious problem in dmaengine which we should fix? If there is a > substantial difficulty then that's different but it doesn't feel like > we've tried doing common code yet, if there's problems doing that I'd > like to understand what they are before we jump ahead of ourselves.
I'm not so familiar with Linux's DMA idea. So we don't know whether non-cyclic dmaengine has problem or not.
Until now, we've developed device drivers use DMA driver like UART, SPI. These drivers are implemented using the same way, you called "non-cyclic", and already applied.
As you said, common code for DMA code can be best solution. However, currently, the code is nothing. So, I want you to accept our driver as first step. Because I think supporting new device is more important for linux than dmaengine common.
thanks -- ROHM Co., Ltd. tomoya -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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