From patchwork Mon Nov 25 11:13:40 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Pargmann X-Patchwork-Id: 3229641 Return-Path: X-Original-To: patchwork-linux-arm@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 8158AC045B for ; Mon, 25 Nov 2013 11:46:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6713020272 for ; Mon, 25 Nov 2013 11:46:25 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5CB8C2026D for ; Mon, 25 Nov 2013 11:46:20 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vku9x-0001hB-R0; Mon, 25 Nov 2013 11:16:59 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vku9C-0003Rz-Fz; Mon, 25 Nov 2013 11:16:10 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vku7s-0003J5-02 for linux-arm-kernel@lists.infradead.org; Mon, 25 Nov 2013 11:14:56 +0000 Received: from dude.hi.pengutronix.de ([2001:6f8:1178:2:21e:67ff:fe11:9c5c]) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1Vku75-0005UY-G2; Mon, 25 Nov 2013 12:13:59 +0100 Received: from mpa by dude.hi.pengutronix.de with local (Exim 4.80) (envelope-from ) id 1Vku73-0007tl-VV; Mon, 25 Nov 2013 12:13:57 +0100 From: Markus Pargmann To: Mark Brown , Liam Girdwood , Timur Tabi Subject: [PATCH v2 4/9] ASoC: fsl-ssi: Add offline_config flag Date: Mon, 25 Nov 2013 12:13:40 +0100 Message-Id: <1385378025-1262-5-git-send-email-mpa@pengutronix.de> X-Mailer: git-send-email 1.8.4.2 In-Reply-To: <1385378025-1262-1-git-send-email-mpa@pengutronix.de> References: <1385378025-1262-1-git-send-email-mpa@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: mpa@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131125_061448_273708_95245894 X-CRM114-Status: GOOD ( 16.99 ) X-Spam-Score: -1.9 (-) Cc: alsa-devel@alsa-project.org, kernel@pengutronix.de, Markus Pargmann , Shawn Guo , Fabio Estevam , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 imx50-ssi and later versions of this IP support online reconfiguration of all registers. The reference manual does not list any registers that can only be configured while the SSI unit is disabled. This patch introduces the flag for later use. Signed-off-by: Markus Pargmann --- sound/soc/fsl/fsl_ssi.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 5e95244..abe6172 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -151,6 +151,7 @@ struct fsl_ssi_private { bool ssi_on_imx; bool imx_ac97; bool use_dma; + bool offline_config; struct clk *clk; struct snd_dmaengine_dai_dma_data dma_params_tx; struct snd_dmaengine_dai_dma_data dma_params_rx; @@ -1030,6 +1031,24 @@ static int fsl_ssi_probe(struct platform_device *pdev) /* Older 8610 DTs didn't have the fifo-depth property */ ssi_private->fifo_depth = 8; + /* + * imx50 and later SoCs have a slightly different IP that allows the + * SSI configuration while the SSI unit is running. + * + * More important, it is necessary on those SoCs to configure the + * sperate TX/RX DMA bits just before starting the stream + * (fsl_ssi_trigger). The SDMA unit has to be configured before fsl_ssi + * sends any DMA requests to the SDMA unit, otherwise it is not defined + * how the SDMA unit handles the DMA request. + * + * SDMA units are present on devices starting at imx35 but the imx35 + * reference manual states that the DMA bits should not be changed + * while the SSI unit is running (SSIEN). So we support the necessary + * online configuration of fsl-ssi starting at imx50. + */ + if (hw_type != FSL_SSI_MX50) + ssi_private->offline_config = true; + if (hw_type == FSL_SSI_MX21 || hw_type == FSL_SSI_MX50) { u32 dma_events[2]; ssi_private->ssi_on_imx = true;