From patchwork Thu Oct 15 01:36:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 7399901 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B937EBEEA4 for ; Thu, 15 Oct 2015 01:44:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E975E2076E for ; Thu, 15 Oct 2015 01:44:10 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id B8E362061C for ; Thu, 15 Oct 2015 01:44:09 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id C4BCA2665A8; Thu, 15 Oct 2015 03:44:08 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, UNPARSEABLE_RELAY,URIBL_BLACK autolearn=no version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id 43110266468; 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Thu, 15 Oct 2015 09:37:41 +0800 (CST) From: Shawn Lin To: Vinod Koul , Heiko Stuebner , Jaroslav Kysela , Takashi Iwai , Mark Brown Date: Thu, 15 Oct 2015 09:36:38 +0800 Message-Id: <1444872998-2548-1-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1444872865-2169-1-git-send-email-shawn.lin@rock-chips.com> References: <1444872865-2169-1-git-send-email-shawn.lin@rock-chips.com> Cc: Addy Ke , Lars-Peter Clausen , alsa-devel@alsa-project.org, Boojin Kim , Shawn Lin , Doug Anderson , linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Olof Johansson , linux-rockchip@lists.infradead.org, linux-spi@vger.kernel.org, Sonny Rao , linux-arm-kernel@lists.infradead.org Subject: [alsa-devel] [PATCH v6 09/10] snd: dmaengine-pcm: add snd_dmaengine_pcm_get_caps interface X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Add snd_dmaengine_pcm_get_caps for I2S devices to query dma controller's caps if they need it to make special limitation due to specific dma controller design Signed-off-by: Shawn Lin --- Changes in v6: - remove get quirks and add get slave caps Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None Changes in v1: None sound/soc/soc-generic-dmaengine-pcm.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c index 6fd1906..225c933 100644 --- a/sound/soc/soc-generic-dmaengine-pcm.c +++ b/sound/soc/soc-generic-dmaengine-pcm.c @@ -466,4 +466,28 @@ void snd_dmaengine_pcm_unregister(struct device *dev) } EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_unregister); + +/** + * snd_dmaengine_pcm_get_caps - Get slave dma caps based PCM device + * @dev: Parent device the PCM was register with + */ +int snd_dmaengine_pcm_get_caps(struct device *dev, struct dma_slave_caps *caps) +{ + struct snd_soc_platform *platform; + struct dmaengine_pcm *pcm; + int ret = -ENODEV; + + platform = snd_soc_lookup_platform(dev); + if (!platform) + return ret; + + pcm = soc_platform_to_pcm(platform); + + if (pcm->chan) + ret = dma_get_slave_caps(pcm->chan[0], caps); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_get_caps); + MODULE_LICENSE("GPL");