On Wed, May 14, 2014 at 8:53 AM, Tushar Behera <tushar.beh...@linaro.org> wrote: > While playing back audio, pmc_dmaengine requests the DMA channel to > stop DMA transmission through DMA_PAUSE command. > > Currently PL330 driver doesn't support DMA pause command, leaving > the DMA state inconsistent when the system resumes. Instead, it would > be better to terminate the DMA transfer during suspend and restart > again during resume. > > Tested with audio playback across a suspend-resume cycle. > What is pmc_dmaengine? How does DMA_PAUSE help, when there is no DMA_RESUME?
DMA_PAUSE means freezing the transfer, not dropping it. DMA_RESUME then moves the transfer again from that point. Clubbing PAUSE with TERMINATE is plain wrong. Sorry. Regards Jassi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
