From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932151Ab2INMKd (ORCPT ); Fri, 14 Sep 2012 08:10:33 -0400 Received: from na3sys009aog109.obsmtp.com ([74.125.149.201]:54996 "EHLO na3sys009aog109.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759430Ab2INMFe (ORCPT ); Fri, 14 Sep 2012 08:05:34 -0400 From: Peter Ujfalusi To: Mark Brown , Liam Girdwood , Tony Lindgren , Russell King , Vinod Koul , Dan Williams , Jarkko Nikula Cc: alsa-devel@alsa-project.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Janusz Krzysztofik , Ricardo Neri , Lars-Peter Clausen Subject: [PATCH v3 01/15] dmaengine: omap: Support for element mode in cyclic DMA Date: Fri, 14 Sep 2012 15:05:44 +0300 Message-Id: <1347624358-25582-2-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.7.12 In-Reply-To: <1347624358-25582-1-git-send-email-peter.ujfalusi@ti.com> References: <1347624358-25582-1-git-send-email-peter.ujfalusi@ti.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When src_maxburst/dst_maxburst is set to 0 by the users of cyclic DMA (mostly audio) indicates that we should configure the omap DMA to element sync mode instead of packet mode. Signed-off-by: Peter Ujfalusi CC: Russell King --- drivers/dma/omap-dma.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index ae05618..b77a40d 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -413,7 +413,10 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( d->dev_addr = dev_addr; d->fi = burst; d->es = es; - d->sync_mode = OMAP_DMA_SYNC_PACKET; + if (burst) + d->sync_mode = OMAP_DMA_SYNC_PACKET; + else + d->sync_mode = OMAP_DMA_SYNC_ELEMENT; d->sync_type = sync_type; d->periph_port = OMAP_DMA_PORT_MPUI; d->sg[0].addr = buf_addr; -- 1.7.12