From patchwork Thu Oct 26 15:05:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Binding X-Patchwork-Id: 13437652 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 7B51CC25B6E for ; Thu, 26 Oct 2023 15:06:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345399AbjJZPGj (ORCPT ); Thu, 26 Oct 2023 11:06:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55842 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345380AbjJZPGe (ORCPT ); Thu, 26 Oct 2023 11:06:34 -0400 Received: from mx0b-001ae601.pphosted.com (mx0a-001ae601.pphosted.com [67.231.149.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 982D61B2; Thu, 26 Oct 2023 08:06:32 -0700 (PDT) Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 39Q5GUrf011654; Thu, 26 Oct 2023 10:06:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= PODMain02222019; bh=wdJIvP71kd5paaffy0gTBO9L9MC9c1x6VHLNrVDIlu8=; b= aoy8gLob0n1gsE5hx65kSnrRIzX7GY+l4uEKFt50502Nn3zHqPNsbTlVTlJedENh yXFqXGjsowQumsR8up5m9R8Quv82AVNPLJaA0ZUeJsJz0YFB6PQGZB+/U1kVlsHh okgtgrORXOsL9ujKuRmKgo2eDDUeCQMqepQJpqLPpkhy+9SvR0EAYQzg0mWcuZcF tcz02AZmTfCJcWQeTSfFhCfPMrdLceKJ+tYKDU+/cXKsxYMd9675duCu12lWNbv6 dEEwr++VX4jfICoZ4bQaG2Nf8fAUSJ49NDD15CAWGlNxOx3/WfMIeyddJeoU3tf9 fQ2C2wEnZVrv9GQGuJTAkA== Received: from ediex02.ad.cirrus.com ([84.19.233.68]) by mx0a-001ae601.pphosted.com (PPS) with ESMTPS id 3tvc1x94k9-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Oct 2023 10:06:11 -0500 (CDT) Received: from ediex02.ad.cirrus.com (198.61.84.81) by ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.37; Thu, 26 Oct 2023 16:06:07 +0100 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by anon-ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server id 15.2.1118.37 via Frontend Transport; Thu, 26 Oct 2023 16:06:07 +0100 Received: from sbinding-cirrus-dsktp2.ad.cirrus.com (unknown [198.90.238.177]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 99D1A2A1; Thu, 26 Oct 2023 15:06:07 +0000 (UTC) From: Stefan Binding To: Jaroslav Kysela , Takashi Iwai , "Mark Brown" CC: , , , , "Stefan Binding" Subject: [PATCH v1 2/8] ALSA: hda: cs35l41: Assert reset before system suspend Date: Thu, 26 Oct 2023 16:05:52 +0100 Message-ID: <20231026150558.2105827-3-sbinding@opensource.cirrus.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231026150558.2105827-1-sbinding@opensource.cirrus.com> References: <20231026150558.2105827-1-sbinding@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-GUID: PrOE1fxLidsnV9ZeqmoNDjFQsX_MJZuV X-Proofpoint-ORIG-GUID: PrOE1fxLidsnV9ZeqmoNDjFQsX_MJZuV X-Proofpoint-Spam-Reason: safe Precedence: bulk List-ID: X-Mailing-List: linux-sound@vger.kernel.org Some system suspend modes may remove power supplies. To ensure we are not running during this time, we should assert reset. Note: since the amps use a shared reset, asserting reset prior to system suspend only works if the amps are suspended in the reverse order to probe. Signed-off-by: Stefan Binding --- sound/pci/hda/cs35l41_hda.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c index 28cb10ddd191..919e38213975 100644 --- a/sound/pci/hda/cs35l41_hda.c +++ b/sound/pci/hda/cs35l41_hda.c @@ -813,14 +813,17 @@ static int cs35l41_system_suspend(struct device *dev) /* Shutdown DSP before system suspend */ ret = cs35l41_ready_for_reset(cs35l41); - if (ret) dev_err(dev, "System Suspend Failed, not ready for Reset: %d\n", ret); - /* - * Reset GPIO may be shared, so cannot reset here. - * However beyond this point, amps may be powered down. - */ + if (cs35l41->reset_gpio) { + dev_info(cs35l41->dev, "Asserting Reset\n"); + gpiod_set_value_cansleep(cs35l41->reset_gpio, 0); + usleep_range(2000, 2100); + } + + dev_dbg(cs35l41->dev, "System Suspended\n"); + return ret; }