From patchwork Tue Apr 1 13:06:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 3922501 Return-Path: X-Original-To: patchwork-davinci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 35F70BF549 for ; Tue, 1 Apr 2014 13:09:17 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2635320221 for ; Tue, 1 Apr 2014 13:09:16 +0000 (UTC) Received: from bear.ext.ti.com (bear.ext.ti.com [192.94.94.41]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F16C1201F9 for ; Tue, 1 Apr 2014 13:09:14 +0000 (UTC) Received: from dflxv15.itg.ti.com ([128.247.5.124]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id s31D8AV9008549; Tue, 1 Apr 2014 08:08:10 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id s31D89JK020926; Tue, 1 Apr 2014 08:08:09 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.174.1; Tue, 1 Apr 2014 08:08:09 -0500 Received: from linux.omap.com (dlelxs01.itg.ti.com [157.170.227.31]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s31D89qU015703; Tue, 1 Apr 2014 08:08:09 -0500 Received: from linux.omap.com (localhost [127.0.0.1]) by linux.omap.com (Postfix) with ESMTP id 65A4E8062C; Tue, 1 Apr 2014 07:08:09 -0600 (CST) X-Original-To: davinci-linux-open-source@linux.davincidsp.com Delivered-To: davinci-linux-open-source@linux.davincidsp.com Received: from dflxv15.itg.ti.com (dflxv15.itg.ti.com [128.247.5.124]) by linux.omap.com (Postfix) with ESMTP id 6862A8062C for ; Tue, 1 Apr 2014 07:06:31 -0600 (CST) Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id s31D6Sjs018691; Tue, 1 Apr 2014 08:06:31 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.174.1; Tue, 1 Apr 2014 08:06:28 -0500 Received: from dflp33.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s31D6Hfd012538; Tue, 1 Apr 2014 08:06:26 -0500 From: Peter Ujfalusi To: , , Subject: [PATCH v2 03/14] dma: edma: Add support for DMA_PAUSE/RESUME operation Date: Tue, 1 Apr 2014 16:06:04 +0300 Message-ID: <1396357575-30585-4-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1396357575-30585-1-git-send-email-peter.ujfalusi@ti.com> References: <1396357575-30585-1-git-send-email-peter.ujfalusi@ti.com> MIME-Version: 1.0 CC: , , , , , , X-BeenThere: davinci-linux-open-source@linux.davincidsp.com X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: Errors-To: davinci-linux-open-source-bounces@linux.davincidsp.com X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Pause/Resume can be used by the audio stack when the stream is paused/resumed The edma platform code has support for this and the legacy audio stack used this. Signed-off-by: Peter Ujfalusi --- drivers/dma/edma.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 2742867fd1e6..7891378a03f0 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -240,6 +240,26 @@ static int edma_slave_config(struct edma_chan *echan, return 0; } +static int edma_dma_pause(struct edma_chan *echan) +{ + /* Pause/Resume only allowed with cyclic mode */ + if (!echan->edesc->cyclic) + return -EINVAL; + + edma_pause(echan->ch_num); + return 0; +} + +static int edma_dma_resume(struct edma_chan *echan) +{ + /* Pause/Resume only allowed with cyclic mode */ + if (!echan->edesc->cyclic) + return -EINVAL; + + edma_resume(echan->ch_num); + return 0; +} + static int edma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long arg) { @@ -255,6 +275,14 @@ static int edma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, config = (struct dma_slave_config *)arg; ret = edma_slave_config(echan, config); break; + case DMA_PAUSE: + ret = edma_dma_pause(echan); + break; + + case DMA_RESUME: + ret = edma_dma_resume(echan); + break; + default: ret = -ENOSYS; }