From patchwork Tue May 26 13:26:07 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 6481201 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 A73D2C0020 for ; Tue, 26 May 2015 13:35:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 354772042A for ; Tue, 26 May 2015 13:34:57 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id B75B9202F0 for ; Tue, 26 May 2015 13:34:55 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id D74CE2656FD; Tue, 26 May 2015 15:34:54 +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=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id 8B4CB26549B; Tue, 26 May 2015 15:29:13 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id C5E5226574E; Tue, 26 May 2015 15:29:11 +0200 (CEST) Received: from comal.ext.ti.com (comal.ext.ti.com [198.47.26.152]) by alsa0.perex.cz (Postfix) with ESMTP id 913E026549B for ; Tue, 26 May 2015 15:27:05 +0200 (CEST) Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id t4QDR3dl008795; Tue, 26 May 2015 08:27:03 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t4QDR3BH030810; Tue, 26 May 2015 08:27:03 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.224.2; Tue, 26 May 2015 08:27:02 -0500 Received: from dflp33.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id t4QDQ9bW027427; Tue, 26 May 2015 08:26:59 -0500 From: Peter Ujfalusi To: , Date: Tue, 26 May 2015 16:26:07 +0300 Message-ID: <1432646768-12532-13-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.3.5 In-Reply-To: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> References: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> MIME-Version: 1.0 Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, Laurent Pinchart , Mauro Carvalho Chehab , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-crypto@vger.kernel.org, linux-serial@vger.kernel.org, dmaengine@vger.kernel.org, dan.j.williams@intel.com, linux-omap@vger.kernel.org, linux-media@vger.kernel.org Subject: [alsa-devel] [PATCH 12/13] [media] omap3isp: Support for deferred probing when requesting DMA channel 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: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Switch to use ma_request_slave_channel_compat_reason() to request the DMA channel. Only fall back to pio mode if the error code returned is not -EPROBE_DEFER, otherwise return from the probe with the -EPROBE_DEFER. Signed-off-by: Peter Ujfalusi CC: Laurent Pinchart CC: Mauro Carvalho Chehab --- drivers/media/platform/omap3isp/isphist.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/omap3isp/isphist.c b/drivers/media/platform/omap3isp/isphist.c index 7138b043a4aa..e690ca13af0e 100644 --- a/drivers/media/platform/omap3isp/isphist.c +++ b/drivers/media/platform/omap3isp/isphist.c @@ -499,14 +499,20 @@ int omap3isp_hist_init(struct isp_device *isp) if (res) sig = res->start; - hist->dma_ch = dma_request_slave_channel_compat(mask, + hist->dma_ch = dma_request_slave_channel_compat_reason(mask, omap_dma_filter_fn, &sig, isp->dev, "hist"); - if (!hist->dma_ch) + if (IS_ERR(hist->dma_ch)) { + ret = PTR_ERR(hist->dma_ch); + if (ret == -EPROBE_DEFER) + return ret; + + hist->dma_ch = NULL; dev_warn(isp->dev, "hist: DMA channel request failed, using PIO\n"); - else + } else { dev_dbg(isp->dev, "hist: using DMA channel %s\n", dma_chan_name(hist->dma_ch)); + } } hist->ops = &hist_ops;