From patchwork Thu Mar 13 09:18:24 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 3823861 X-Patchwork-Delegate: vinod.koul@intel.com Return-Path: X-Original-To: patchwork-dmaengine@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 77A67BF540 for ; Thu, 13 Mar 2014 09:25:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B5D44201BF for ; Thu, 13 Mar 2014 09:25:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D873020176 for ; Thu, 13 Mar 2014 09:25:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753548AbaCMJT0 (ORCPT ); Thu, 13 Mar 2014 05:19:26 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:57391 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753540AbaCMJTX (ORCPT ); Thu, 13 Mar 2014 05:19:23 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id s2D9IsXS002363; Thu, 13 Mar 2014 04:18:54 -0500 Received: from DLEE70.ent.ti.com (dlemailx.itg.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s2D9IrsK030873; Thu, 13 Mar 2014 04:18:54 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.174.1; Thu, 13 Mar 2014 04:18:53 -0500 Received: from dflp32.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s2D9IfhX005531; Thu, 13 Mar 2014 04:18:50 -0500 From: Peter Ujfalusi To: , , , , CC: , , Mark Brown , Liam Girdwood , Tony Lindgren , , Jyri Sarha , , , Subject: [PATCH 02/18] dma: edma: Add support for DMA_PAUSE/RESUME operation Date: Thu, 13 Mar 2014 11:18:24 +0200 Message-ID: <1394702320-21743-3-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1394702320-21743-1-git-send-email-peter.ujfalusi@ti.com> References: <1394702320-21743-1-git-send-email-peter.ujfalusi@ti.com> MIME-Version: 1.0 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 cd04eb7b182e..b54cd2dedde0 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; }