On Wed, Jun 08, 2011 at 09:35:34AM +0530, Jassi Brar wrote: > In real life, I saw that with the Samsung's SPDIF controller which has > fifo depth only for a few samples and it gets very demanding if pro > quality is expected. Aggravate that with high irq-latency under system > load. > And in such cases, it is much more preferable to employ system timers > to generate period_elapsed updates and queue the whole ring buffer as > one transfer item to be iterated endlessly by dma. Ex, PL330 doesn't > lend to LLI but can be programmed endlessly looping one transfer item. So you're talking about the _hardware_ circular buffer case which I mentioned in my email. No problem with the DMA engine API as has already been said - it supports preparation of circular buffers. So, from everything discussed so far, there's nothing lacking from the DMA engine API for your purposes. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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