From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A558AEB64D7 for ; Mon, 26 Jun 2023 18:34:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232299AbjFZSeE (ORCPT ); Mon, 26 Jun 2023 14:34:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232304AbjFZSeC (ORCPT ); Mon, 26 Jun 2023 14:34:02 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B48CE72 for ; Mon, 26 Jun 2023 11:34:00 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8541760F24 for ; Mon, 26 Jun 2023 18:33:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A682C433C0; Mon, 26 Jun 2023 18:33:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687804439; bh=qM1zyWhIcnuGdrWVUOFioXZD/zskQZe1GJXMqbI3dQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dpxtZkl1sayadIny21lL6AQ/+XGp4tsNRofcX/FgN1o449JEKuoL1WcWgwHehwHOY ruIQXZIKnlV493hcRkf14cDgRWKqhLizvIO5bg56VVZ0Nneh5O8kzBATuPkhvjfG6r +x4Ys8Lrvu9Tyr0ZD9sch/WNWCPNmlLZdk43Pa/M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chancel Liu , Shengjiu Wang , Mark Brown , Sasha Levin Subject: [PATCH 6.1 157/170] ASoC: fsl_sai: Enable BCI bit if SAI works on synchronous mode with BYP asserted Date: Mon, 26 Jun 2023 20:12:06 +0200 Message-ID: <20230626180807.510546553@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180800.476539630@linuxfoundation.org> References: <20230626180800.476539630@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chancel Liu [ Upstream commit 32cf0046a652116d6a216d575f3049a9ff9dd80d ] There's an issue on SAI synchronous mode that TX/RX side can't get BCLK from RX/TX it sync with if BYP bit is asserted. It's a workaround to fix it that enable SION of IOMUX pad control and assert BCI. For example if TX sync with RX which means both TX and RX are using clk form RX and BYP=1. TX can get BCLK only if the following two conditions are valid: 1. SION of RX BCLK IOMUX pad is set to 1 2. BCI of TX is set to 1 Signed-off-by: Chancel Liu Acked-by: Shengjiu Wang Link: https://lore.kernel.org/r/20230530103012.3448838-1-chancel.liu@nxp.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/fsl/fsl_sai.c | 11 +++++++++-- sound/soc/fsl/fsl_sai.h | 1 + 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 6d88af5b287fe..b33104715c7ba 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -491,14 +491,21 @@ 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])); - if (savediv == 1) + if (savediv == 1) { regmap_update_bits(sai->regmap, reg, FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP, FSL_SAI_CR2_BYP); - else + if (fsl_sai_dir_is_synced(sai, adir)) + regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs), + FSL_SAI_CR2_BCI, FSL_SAI_CR2_BCI); + else + regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs), + FSL_SAI_CR2_BCI, 0); + } else { regmap_update_bits(sai->regmap, reg, FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP, savediv / 2 - 1); + } if (sai->soc_data->max_register >= FSL_SAI_MCTL) { /* SAI is in master mode at this point, so enable MCLK */ diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h index 697f6690068c8..c5423f81e4560 100644 --- a/sound/soc/fsl/fsl_sai.h +++ b/sound/soc/fsl/fsl_sai.h @@ -116,6 +116,7 @@ /* SAI Transmit and Receive Configuration 2 Register */ #define FSL_SAI_CR2_SYNC BIT(30) +#define FSL_SAI_CR2_BCI BIT(28) #define FSL_SAI_CR2_MSEL_MASK (0x3 << 26) #define FSL_SAI_CR2_MSEL_BUS 0 #define FSL_SAI_CR2_MSEL_MCLK1 BIT(26) -- 2.39.2