From patchwork Wed Mar 2 08:34:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 12765676 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C962CC433F5 for ; Wed, 2 Mar 2022 09:05:09 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 083842805; Wed, 2 Mar 2022 10:04:18 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 083842805 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1646211908; bh=NxYN1oordxpdXD0Ik2hAvGSyeoB6n/Vgs9LHQeQsUHk=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=XLxzcEHG6tB/9EYXT2p/MwN5CZJk4FdPQbegFfP7m7UTmR4IAojEE1Vf20bw6m5Fe Ht7OTMcNWCWu+FeFijiWY3D3aVU7QiRS1C6o9h1gooU+4hh7bPmYDE4lVMYM4VUaF5 CVikJxh7dKCn1uh1fbWV7H4fSruw1uNJelyu84Q8= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 73F01F896F0; Wed, 2 Mar 2022 09:34:56 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 4952AF80CB5; Wed, 2 Mar 2022 09:34:45 +0100 (CET) Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 2A22CF8087A for ; Wed, 2 Mar 2022 09:34:32 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 2A22CF8087A Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nPKRL-0005uY-F5; Wed, 02 Mar 2022 09:34:31 +0100 Received: from sha by dude02.hi.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1nPKRK-00Fxnj-FQ; Wed, 02 Mar 2022 09:34:30 +0100 From: Sascha Hauer To: alsa-devel@alsa-project.org Subject: [PATCH 7/7] ASoC: fsl_sai: implement 1:1 bclk:mclk ratio support Date: Wed, 2 Mar 2022 09:34:28 +0100 Message-Id: <20220302083428.3804687-8-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220302083428.3804687-1-s.hauer@pengutronix.de> References: <20220302083428.3804687-1-s.hauer@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: alsa-devel@alsa-project.org Cc: Ahmad Fatoum , kernel@pengutronix.de, Xiubo Li , Sascha Hauer , Nicolin Chen , Mark Brown , Viorel Suman X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 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" From: Ahmad Fatoum With higher channel counts, we may need higher clock rates. Starting with SAI v3.1 (i.MX8MM), we can bypass the divider and get a 1:1 bclk:mclk ratio. Add the necessary support. Signed-off-by: Viorel Suman Signed-off-by: Ahmad Fatoum Signed-off-by: Sascha Hauer --- sound/soc/fsl/fsl_sai.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 818bb982427f8..0845f50735248 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -347,6 +347,7 @@ static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) int adir = tx ? RX : TX; int dir = tx ? TX : RX; u32 id; + bool support_1_1_ratio = sai->verid.version >= 0x0301; /* Don't apply to consumer mode */ if (sai->is_consumer_mode) @@ -367,7 +368,11 @@ static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) continue; ratio = DIV_ROUND_CLOSEST(clk_rate, freq); - if (!ratio || ratio > 512 || ratio & 1) + if (!ratio || ratio > 512) + continue; + if (ratio == 1 && !support_1_1_ratio) + continue; + else if (ratio & 1) continue; diff = abs((long)clk_rate - ratio * freq); @@ -422,7 +427,15 @@ static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) regmap_update_bits(sai->regmap, reg, FSL_SAI_CR2_MSEL_MASK, FSL_SAI_CR2_MSEL(sai->mclk_id[tx])); - regmap_update_bits(sai->regmap, reg, FSL_SAI_CR2_DIV_MASK, savediv / 2 - 1); + + if (savediv == 1) + regmap_update_bits(sai->regmap, reg, + FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP, + FSL_SAI_CR2_BYP); + else + regmap_update_bits(sai->regmap, reg, + FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP, + savediv / 2 - 1); return 0; }