From patchwork Thu Aug 26 04:02:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: sugar zhang X-Patchwork-Id: 502927 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2BCFC432BE for ; Thu, 26 Aug 2021 04:04:34 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 631A3610D1 for ; Thu, 26 Aug 2021 04:04:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 631A3610D1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-project.org 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 F31EA168A; Thu, 26 Aug 2021 06:03:42 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz F31EA168A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1629950673; bh=0sLueFxwn8iTHbh99ZkL1pTKQXw/acYMC7FLjsVRamA=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=HkGcQpBcr6H4iFsPo1PVp9rVJ+As+1nozOlPHbcXaCr93rKIibgkDJM+R9iqnOXHf yxSAD5bg1zFdcRBq3IP5JhB1G+LnCHDoTRBo3a4y5Ks/sf/oIZ2po7axjQMwoqidtX c8GnxYWTD3oIrCVajE7onHhJ/1XJaksQfPB1YUgE= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 8061FF804F2; Thu, 26 Aug 2021 06:02:58 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id C73B7F804F2; Thu, 26 Aug 2021 06:02:56 +0200 (CEST) Received: from lucky1.263xmail.com (lucky1.263xmail.com [211.157.147.130]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 83F20F804F1 for ; Thu, 26 Aug 2021 06:02:48 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 83F20F804F1 Received: from localhost (unknown [192.168.167.70]) by lucky1.263xmail.com (Postfix) with ESMTP id 53793D7683; Thu, 26 Aug 2021 12:02:46 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-SKE-CHECKED: 1 X-ANTISPAM-LEVEL: 2 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P22778T140142501164800S1629950564011175_; Thu, 26 Aug 2021 12:02:45 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: X-RL-SENDER: sugar.zhang@rock-chips.com X-SENDER: zxg@rock-chips.com X-LOGIN-NAME: sugar.zhang@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 6 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Sugar Zhang To: broonie@kernel.org, heiko@sntech.de Subject: [PATCH v3 06/14] ASoC: rockchip: i2s: Reset the controller if soft reset failed Date: Thu, 26 Aug 2021 12:02:34 +0800 Message-Id: <1629950562-14281-1-git-send-email-sugar.zhang@rock-chips.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1629950441-14118-1-git-send-email-sugar.zhang@rock-chips.com> References: <1629950441-14118-1-git-send-email-sugar.zhang@rock-chips.com> Cc: Sugar Zhang , linux-rockchip@lists.infradead.org, alsa-devel@alsa-project.org, devicetree@vger.kernel.org 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" This patch brings i2s back to normal by resetting i2s m/h when the soft reset failed. Signed-off-by: Sugar Zhang --- Changes in v3: None Changes in v2: None sound/soc/rockchip/rockchip_i2s.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index 0ba728f..78321ee 100644 --- a/sound/soc/rockchip/rockchip_i2s.c +++ b/sound/soc/rockchip/rockchip_i2s.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -40,6 +41,8 @@ struct rk_i2s_dev { struct regmap *regmap; struct regmap *grf; + struct reset_control *reset_m; + struct reset_control *reset_h; /* * Used to indicate the tx/rx status. @@ -92,6 +95,20 @@ static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai) return snd_soc_dai_get_drvdata(dai); } +static void rockchip_i2s_reset(struct rk_i2s_dev *i2s) +{ + dev_warn(i2s->dev, "Reset controller.\n"); + + reset_control_assert(i2s->reset_m); + reset_control_assert(i2s->reset_h); + udelay(1); + reset_control_deassert(i2s->reset_m); + reset_control_deassert(i2s->reset_h); + + regcache_mark_dirty(i2s->regmap); + regcache_sync(i2s->regmap); +} + static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) { unsigned int val = 0; @@ -132,7 +149,7 @@ static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) regmap_read(i2s->regmap, I2S_CLR, &val); retry--; if (!retry) { - dev_warn(i2s->dev, "fail to clear\n"); + rockchip_i2s_reset(i2s); break; } } @@ -181,7 +198,7 @@ static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) regmap_read(i2s->regmap, I2S_CLR, &val); retry--; if (!retry) { - dev_warn(i2s->dev, "fail to clear\n"); + rockchip_i2s_reset(i2s); break; } } @@ -629,6 +646,14 @@ static int rockchip_i2s_probe(struct platform_device *pdev) i2s->pins = of_id->data; } + i2s->reset_m = devm_reset_control_get_optional(&pdev->dev, "reset-m"); + if (IS_ERR(i2s->reset_m)) + return PTR_ERR(i2s->reset_m); + + i2s->reset_h = devm_reset_control_get_optional(&pdev->dev, "reset-h"); + if (IS_ERR(i2s->reset_h)) + return PTR_ERR(i2s->reset_h); + /* try to prepare related clocks */ i2s->hclk = devm_clk_get(&pdev->dev, "i2s_hclk"); if (IS_ERR(i2s->hclk)) {